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gecko-dev/dom/base/nsContentUtils.cpp
Emilio Cobos Álvarez 2e05768081 Bug 1578379 - Make pageshow / pagehide during frame loader swaps not mess with document visibility. r=bzbarsky 
Also while doing it:

 * Ensure activity observers get notified after visibility is computed already.
This is how we notify all other activity observers already, and we are
double-notifying in the case we actually get a page show _and_ a visibility
change, but this is a pre-existing problem.

 * Remove special-cases for InFrameSwap() from MediaRecorder. Now that pagehide
doesn't mess up with our visibility state the regular check just works. I
ensured I didn't regress bug 1444541.

 * Had to fix a UITour test that relied on the visibility changing back and
forth for the detached tab. It seems there's no real place in UITour that
listens to that event so we should be good.

 * Added tests, verifying that they both fail without the patch.

After this we can remove nsDocShell::InFrameSwap(), as the only caller is the
assertion, but I wanted to keep it regardless, at least for now, until this
patch has been in for a bit.

Differential Revision: https://phabricator.services.mozilla.com/D45906

--HG--
extra : moz-landing-system : lando
2019-09-23 10:16:44 +00:00

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* A namespace class for static layout utilities. */
#include "nsContentUtils.h"
#include <algorithm>
#include <math.h>
#include "DecoderTraits.h"
#include "harfbuzz/hb.h"
#include "imgICache.h"
#include "imgIContainer.h"
#include "imgINotificationObserver.h"
#include "imgLoader.h"
#include "imgRequestProxy.h"
#include "jsapi.h"
#include "jsfriendapi.h"
#include "js/ArrayBuffer.h" // JS::{GetArrayBufferData,IsArrayBufferObject,NewArrayBuffer}
#include "js/JSON.h"
#include "js/RegExp.h" // JS::ExecuteRegExpNoStatics, JS::NewUCRegExpObject, JS::RegExpFlags
#include "js/Value.h"
#include "Layers.h"
#include "nsAppRunner.h"
// nsNPAPIPluginInstance must be included before mozilla/dom/Document.h, which
// is included in mozAutoDocUpdate.h.
#include "nsNPAPIPluginInstance.h"
#include "gfxDrawable.h"
#include "ImageOps.h"
#include "mozAutoDocUpdate.h"
#include "mozilla/AntiTrackingCommon.h"
#include "mozilla/ArrayUtils.h"
#include "mozilla/Attributes.h"
#include "mozilla/AutoRestore.h"
#include "mozilla/AutoTimelineMarker.h"
#include "mozilla/BackgroundHangMonitor.h"
#include "mozilla/Base64.h"
#include "mozilla/BasePrincipal.h"
#include "mozilla/CheckedInt.h"
#include "mozilla/Components.h"
#include "mozilla/DebugOnly.h"
#include "mozilla/LoadInfo.h"
#include "mozilla/dom/BlobURLProtocolHandler.h"
#include "mozilla/dom/ContentParent.h"
#include "mozilla/dom/ContentChild.h"
#include "mozilla/dom/CustomElementRegistry.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/DocumentInlines.h"
#include "mozilla/dom/MessageBroadcaster.h"
#include "mozilla/dom/DocumentFragment.h"
#include "mozilla/dom/DOMException.h"
#include "mozilla/dom/DOMExceptionBinding.h"
#include "mozilla/dom/DOMTypes.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/ElementInlines.h"
#include "mozilla/dom/Event.h"
#include "mozilla/dom/FileSystemSecurity.h"
#include "mozilla/dom/FileBlobImpl.h"
#include "mozilla/dom/FontTableURIProtocolHandler.h"
#include "mozilla/dom/HTMLInputElement.h"
#include "mozilla/dom/HTMLSlotElement.h"
#include "mozilla/dom/HTMLTemplateElement.h"
#include "mozilla/dom/HTMLTextAreaElement.h"
#include "mozilla/dom/IDTracker.h"
#include "mozilla/dom/MouseEventBinding.h"
#include "mozilla/dom/KeyboardEventBinding.h"
#include "mozilla/dom/IPCBlobUtils.h"
#include "mozilla/dom/NodeBinding.h"
#include "mozilla/dom/Promise.h"
#include "mozilla/dom/BrowserBridgeChild.h"
#include "mozilla/dom/ScriptSettings.h"
#include "mozilla/dom/BrowserParent.h"
#include "mozilla/dom/Text.h"
#include "mozilla/dom/TouchEvent.h"
#include "mozilla/dom/ShadowRoot.h"
#include "mozilla/dom/XULCommandEvent.h"
#include "mozilla/dom/UserActivation.h"
#include "mozilla/dom/WorkerCommon.h"
#include "mozilla/dom/WorkerPrivate.h"
#include "mozilla/net/CookieSettings.h"
#include "mozilla/EventDispatcher.h"
#include "mozilla/EventListenerManager.h"
#include "mozilla/EventStateManager.h"
#include "mozilla/gfx/DataSurfaceHelpers.h"
#include "mozilla/HTMLEditor.h"
#include "mozilla/IMEStateManager.h"
#include "mozilla/InternalMutationEvent.h"
#include "mozilla/Likely.h"
#include "mozilla/ManualNAC.h"
#include "mozilla/MouseEvents.h"
#include "mozilla/Preferences.h"
#include "mozilla/PresShell.h"
#include "mozilla/ResultExtensions.h"
#include "mozilla/dom/Selection.h"
#include "mozilla/Services.h"
#include "mozilla/StaticPrefs_dom.h"
#include "mozilla/StaticPrefs_full_screen_api.h"
#ifdef FUZZING
# include "mozilla/StaticPrefs_fuzzing.h"
#endif
#include "mozilla/StaticPrefs_privacy.h"
#include "mozilla/StaticPrefs_test.h"
#include "mozilla/StaticPrefs_ui.h"
#include "mozilla/TextEditor.h"
#include "mozilla/TextEvents.h"
#include "nsArrayUtils.h"
#include "nsAString.h"
#include "nsAttrName.h"
#include "nsAttrValue.h"
#include "nsAttrValueInlines.h"
#include "nsBindingManager.h"
#include "nsCanvasFrame.h"
#include "nsCaret.h"
#include "nsCCUncollectableMarker.h"
#include "nsCharSeparatedTokenizer.h"
#include "nsCOMPtr.h"
#include "nsContentCreatorFunctions.h"
#include "nsContentDLF.h"
#include "nsContentList.h"
#include "nsContentPolicyUtils.h"
#include "nsContentSecurityManager.h"
#include "nsCRT.h"
#include "nsCycleCollectionParticipant.h"
#include "nsCycleCollector.h"
#include "nsDataHashtable.h"
#include "nsDocShellCID.h"
#include "nsDOMCID.h"
#include "mozilla/dom/DataTransfer.h"
#include "nsDOMJSUtils.h"
#include "nsDOMMutationObserver.h"
#include "nsError.h"
#include "nsFocusManager.h"
#include "nsFrameLoaderOwner.h"
#include "nsGenericHTMLElement.h"
#include "nsGenericHTMLFrameElement.h"
#include "nsGkAtoms.h"
#include "nsHtml5Module.h"
#include "nsHtml5StringParser.h"
#include "nsHTMLDocument.h"
#include "nsHTMLTags.h"
#include "nsIAddonPolicyService.h"
#include "nsIAnonymousContentCreator.h"
#include "nsIAsyncVerifyRedirectCallback.h"
#include "nsICategoryManager.h"
#include "nsIChannelEventSink.h"
#include "nsICharsetDetectionObserver.h"
#include "nsIChromeRegistry.h"
#include "nsIConsoleService.h"
#include "nsIContent.h"
#include "nsIContentInlines.h"
#include "nsIContentSecurityPolicy.h"
#include "nsIContentSink.h"
#include "nsIContentViewer.h"
#include "nsIDocShell.h"
#include "nsIDocShellTreeOwner.h"
#include "mozilla/dom/Document.h"
#include "nsIDocumentEncoder.h"
#include "nsIDOMChromeWindow.h"
#include "nsIDOMWindowUtils.h"
#include "nsIDragService.h"
#include "nsIFormControl.h"
#include "nsIForm.h"
#include "nsIFragmentContentSink.h"
#include "nsContainerFrame.h"
#include "nsIHttpChannelInternal.h"
#include "nsIIdleService.h"
#include "nsIImageLoadingContent.h"
#include "nsIInterfaceRequestor.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsIIOService.h"
#include "nsILoadContext.h"
#include "nsILoadGroup.h"
#include "nsIMemoryReporter.h"
#include "nsIMIMEHeaderParam.h"
#include "nsIMIMEService.h"
#include "nsINode.h"
#include "mozilla/dom/NodeInfo.h"
#include "mozilla/NullPrincipal.h"
#include "nsIObjectLoadingContent.h"
#include "nsIObserver.h"
#include "nsIObserverService.h"
#include "nsIOfflineCacheUpdate.h"
#include "nsIParser.h"
#include "nsIParserUtils.h"
#include "nsIPermissionManager.h"
#include "nsIPluginHost.h"
#include "nsIRequest.h"
#include "nsIRunnable.h"
#include "nsIScriptContext.h"
#include "nsIScriptError.h"
#include "nsIScriptGlobalObject.h"
#include "nsIScriptObjectPrincipal.h"
#include "nsIScriptSecurityManager.h"
#include "nsIScrollable.h"
#include "nsIStreamConverter.h"
#include "nsIStreamConverterService.h"
#include "nsIStringBundle.h"
#include "nsIURI.h"
#include "nsIURIMutator.h"
#include "nsIURIWithSpecialOrigin.h"
#include "nsIURL.h"
#include "nsIWebNavigation.h"
#include "nsIWidget.h"
#include "nsIWindowMediator.h"
#include "nsIXPConnect.h"
#include "nsJSUtils.h"
#include "nsMappedAttributes.h"
#include "nsNetCID.h"
#include "nsNetUtil.h"
#include "nsNodeInfoManager.h"
#include "nsParserCIID.h"
#include "nsParserConstants.h"
#include "nsPIDOMWindow.h"
#include "nsPresContext.h"
#include "nsPrintfCString.h"
#include "nsQueryObject.h"
#include "nsSandboxFlags.h"
#include "nsScriptSecurityManager.h"
#include "nsSerializationHelper.h"
#include "nsStreamUtils.h"
#include "nsTextEditorState.h"
#include "nsTextFragment.h"
#include "nsTextNode.h"
#include "nsThreadUtils.h"
#include "nsTreeSanitizer.h"
#include "nsUnicodeProperties.h"
#include "nsURLHelper.h"
#include "nsViewManager.h"
#include "nsViewportInfo.h"
#include "nsWidgetsCID.h"
#include "nsIWindowProvider.h"
#include "nsWrapperCacheInlines.h"
#include "nsXULPopupManager.h"
#include "xpcprivate.h" // nsXPConnect
#include "HTMLSplitOnSpacesTokenizer.h"
#include "InProcessBrowserChildMessageManager.h"
#include "nsContentTypeParser.h"
#include "nsICookiePermission.h"
#include "nsICookieService.h"
#include "ThirdPartyUtil.h"
#include "mozilla/EnumSet.h"
#include "mozilla/BloomFilter.h"
#include "BrowserChild.h"
#include "mozilla/dom/DocGroup.h"
#include "mozilla/dom/TabGroup.h"
#include "nsIWebNavigationInfo.h"
#include "nsPluginHost.h"
#include "nsIBrowser.h"
#include "mozilla/HangAnnotations.h"
#include "mozilla/Encoding.h"
#include "nsXULElement.h"
#include "mozilla/RecordReplay.h"
#include "nsThreadManager.h"
#include "nsIBidiKeyboard.h"
#include "ReferrerInfo.h"
#if defined(XP_WIN)
// Undefine LoadImage to prevent naming conflict with Windows.
# undef LoadImage
#endif
extern "C" int MOZ_XMLTranslateEntity(const char* ptr, const char* end,
const char** next, char16_t* result);
extern "C" int MOZ_XMLCheckQName(const char* ptr, const char* end, int ns_aware,
const char** colon);
class imgLoader;
class nsAtom;
using namespace mozilla::dom;
using namespace mozilla::ipc;
using namespace mozilla::gfx;
using namespace mozilla::layers;
using namespace mozilla::widget;
using namespace mozilla;
const char kLoadAsData[] = "loadAsData";
nsIXPConnect* nsContentUtils::sXPConnect;
nsIScriptSecurityManager* nsContentUtils::sSecurityManager;
nsIPrincipal* nsContentUtils::sSystemPrincipal;
nsIPrincipal* nsContentUtils::sNullSubjectPrincipal;
nsNameSpaceManager* nsContentUtils::sNameSpaceManager;
nsIIOService* nsContentUtils::sIOService;
nsIUUIDGenerator* nsContentUtils::sUUIDGenerator;
nsIConsoleService* nsContentUtils::sConsoleService;
nsDataHashtable<nsRefPtrHashKey<nsAtom>, EventNameMapping>*
nsContentUtils::sAtomEventTable = nullptr;
nsDataHashtable<nsStringHashKey, EventNameMapping>*
nsContentUtils::sStringEventTable = nullptr;
nsTArray<RefPtr<nsAtom>>* nsContentUtils::sUserDefinedEvents = nullptr;
nsIStringBundleService* nsContentUtils::sStringBundleService;
nsIStringBundle* nsContentUtils::sStringBundles[PropertiesFile_COUNT];
nsIContentPolicy* nsContentUtils::sContentPolicyService;
bool nsContentUtils::sTriedToGetContentPolicy = false;
RefPtr<mozilla::intl::LineBreaker> nsContentUtils::sLineBreaker;
RefPtr<mozilla::intl::WordBreaker> nsContentUtils::sWordBreaker;
StaticRefPtr<nsIBidiKeyboard> nsContentUtils::sBidiKeyboard;
uint32_t nsContentUtils::sScriptBlockerCount = 0;
uint32_t nsContentUtils::sDOMNodeRemovedSuppressCount = 0;
AutoTArray<nsCOMPtr<nsIRunnable>, 8>* nsContentUtils::sBlockedScriptRunners =
nullptr;
uint32_t nsContentUtils::sRunnersCountAtFirstBlocker = 0;
nsIInterfaceRequestor* nsContentUtils::sSameOriginChecker = nullptr;
bool nsContentUtils::sIsHandlingKeyBoardEvent = false;
nsString* nsContentUtils::sShiftText = nullptr;
nsString* nsContentUtils::sControlText = nullptr;
nsString* nsContentUtils::sMetaText = nullptr;
nsString* nsContentUtils::sOSText = nullptr;
nsString* nsContentUtils::sAltText = nullptr;
nsString* nsContentUtils::sModifierSeparator = nullptr;
bool nsContentUtils::sInitialized = false;
#ifndef RELEASE_OR_BETA
bool nsContentUtils::sBypassCSSOMOriginCheck = false;
#endif
nsCString* nsContentUtils::sJSBytecodeMimeType = nullptr;
nsContentUtils::UserInteractionObserver*
nsContentUtils::sUserInteractionObserver = nullptr;
nsHtml5StringParser* nsContentUtils::sHTMLFragmentParser = nullptr;
nsIParser* nsContentUtils::sXMLFragmentParser = nullptr;
nsIFragmentContentSink* nsContentUtils::sXMLFragmentSink = nullptr;
bool nsContentUtils::sFragmentParsingActive = false;
mozilla::LazyLogModule nsContentUtils::sDOMDumpLog("Dump");
int32_t nsContentUtils::sInnerOrOuterWindowCount = 0;
uint32_t nsContentUtils::sInnerOrOuterWindowSerialCounter = 0;
template int32_t nsContentUtils::ComparePoints(
const RangeBoundary& aFirstBoundary, const RangeBoundary& aSecondBoundary,
bool* aDisconnected);
template int32_t nsContentUtils::ComparePoints(
const RangeBoundary& aFirstBoundary,
const RawRangeBoundary& aSecondBoundary, bool* aDisconnected);
template int32_t nsContentUtils::ComparePoints(
const RawRangeBoundary& aFirstBoundary,
const RangeBoundary& aSecondBoundary, bool* aDisconnected);
template int32_t nsContentUtils::ComparePoints(
const RawRangeBoundary& aFirstBoundary,
const RawRangeBoundary& aSecondBoundary, bool* aDisconnected);
// Subset of
// http://www.whatwg.org/specs/web-apps/current-work/#autofill-field-name
enum AutocompleteUnsupportedFieldName : uint8_t {
#define AUTOCOMPLETE_UNSUPPORTED_FIELD_NAME(name_, value_) \
eAutocompleteUnsupportedFieldName_##name_,
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_UNSUPPORTED_FIELD_NAME
};
enum AutocompleteNoPersistFieldName : uint8_t {
#define AUTOCOMPLETE_NO_PERSIST_FIELD_NAME(name_, value_) \
eAutocompleteNoPersistFieldName_##name_,
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_NO_PERSIST_FIELD_NAME
};
enum AutocompleteUnsupportFieldContactHint : uint8_t {
#define AUTOCOMPLETE_UNSUPPORTED_FIELD_CONTACT_HINT(name_, value_) \
eAutocompleteUnsupportedFieldContactHint_##name_,
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_UNSUPPORTED_FIELD_CONTACT_HINT
};
enum AutocompleteFieldName : uint8_t {
#define AUTOCOMPLETE_FIELD_NAME(name_, value_) eAutocompleteFieldName_##name_,
#define AUTOCOMPLETE_CONTACT_FIELD_NAME(name_, value_) \
AUTOCOMPLETE_FIELD_NAME(name_, value_)
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_FIELD_NAME
#undef AUTOCOMPLETE_CONTACT_FIELD_NAME
};
enum AutocompleteFieldHint : uint8_t {
#define AUTOCOMPLETE_FIELD_HINT(name_, value_) eAutocompleteFieldHint_##name_,
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_FIELD_HINT
};
enum AutocompleteFieldContactHint : uint8_t {
#define AUTOCOMPLETE_FIELD_CONTACT_HINT(name_, value_) \
eAutocompleteFieldContactHint_##name_,
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_FIELD_CONTACT_HINT
};
enum AutocompleteCategory {
#define AUTOCOMPLETE_CATEGORY(name_, value_) eAutocompleteCategory_##name_,
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_CATEGORY
};
static const nsAttrValue::EnumTable kAutocompleteUnsupportedFieldNameTable[] = {
#define AUTOCOMPLETE_UNSUPPORTED_FIELD_NAME(name_, value_) \
{value_, eAutocompleteUnsupportedFieldName_##name_},
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_UNSUPPORTED_FIELD_NAME
{nullptr, 0}};
static const nsAttrValue::EnumTable kAutocompleteNoPersistFieldNameTable[] = {
#define AUTOCOMPLETE_NO_PERSIST_FIELD_NAME(name_, value_) \
{value_, eAutocompleteNoPersistFieldName_##name_},
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_NO_PERSIST_FIELD_NAME
{nullptr, 0}};
static const nsAttrValue::EnumTable
kAutocompleteUnsupportedContactFieldHintTable[] = {
#define AUTOCOMPLETE_UNSUPPORTED_FIELD_CONTACT_HINT(name_, value_) \
{value_, eAutocompleteUnsupportedFieldContactHint_##name_},
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_UNSUPPORTED_FIELD_CONTACT_HINT
{nullptr, 0}};
static const nsAttrValue::EnumTable kAutocompleteFieldNameTable[] = {
#define AUTOCOMPLETE_FIELD_NAME(name_, value_) \
{value_, eAutocompleteFieldName_##name_},
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_FIELD_NAME
{nullptr, 0}};
static const nsAttrValue::EnumTable kAutocompleteContactFieldNameTable[] = {
#define AUTOCOMPLETE_CONTACT_FIELD_NAME(name_, value_) \
{value_, eAutocompleteFieldName_##name_},
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_CONTACT_FIELD_NAME
{nullptr, 0}};
static const nsAttrValue::EnumTable kAutocompleteFieldHintTable[] = {
#define AUTOCOMPLETE_FIELD_HINT(name_, value_) \
{value_, eAutocompleteFieldHint_##name_},
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_FIELD_HINT
{nullptr, 0}};
static const nsAttrValue::EnumTable kAutocompleteContactFieldHintTable[] = {
#define AUTOCOMPLETE_FIELD_CONTACT_HINT(name_, value_) \
{value_, eAutocompleteFieldContactHint_##name_},
#include "AutocompleteFieldList.h"
#undef AUTOCOMPLETE_FIELD_CONTACT_HINT
{nullptr, 0}};
namespace {
static NS_DEFINE_CID(kCParserCID, NS_PARSER_CID);
static PLDHashTable* sEventListenerManagersHash;
class DOMEventListenerManagersHashReporter final : public nsIMemoryReporter {
MOZ_DEFINE_MALLOC_SIZE_OF(MallocSizeOf)
~DOMEventListenerManagersHashReporter() = default;
public:
NS_DECL_ISUPPORTS
NS_IMETHOD CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) override {
// We don't measure the |EventListenerManager| objects pointed to by the
// entries because those references are non-owning.
int64_t amount =
sEventListenerManagersHash
? sEventListenerManagersHash->ShallowSizeOfIncludingThis(
MallocSizeOf)
: 0;
MOZ_COLLECT_REPORT(
"explicit/dom/event-listener-managers-hash", KIND_HEAP, UNITS_BYTES,
amount, "Memory used by the event listener manager's hash table.");
return NS_OK;
}
};
NS_IMPL_ISUPPORTS(DOMEventListenerManagersHashReporter, nsIMemoryReporter)
class EventListenerManagerMapEntry : public PLDHashEntryHdr {
public:
explicit EventListenerManagerMapEntry(const void* aKey) : mKey(aKey) {}
~EventListenerManagerMapEntry() {
NS_ASSERTION(!mListenerManager, "caller must release and disconnect ELM");
}
protected: // declared protected to silence clang warnings
const void* mKey; // must be first, to look like PLDHashEntryStub
public:
RefPtr<EventListenerManager> mListenerManager;
};
static void EventListenerManagerHashInitEntry(PLDHashEntryHdr* entry,
const void* key) {
// Initialize the entry with placement new
new (entry) EventListenerManagerMapEntry(key);
}
static void EventListenerManagerHashClearEntry(PLDHashTable* table,
PLDHashEntryHdr* entry) {
EventListenerManagerMapEntry* lm =
static_cast<EventListenerManagerMapEntry*>(entry);
// Let the EventListenerManagerMapEntry clean itself up...
lm->~EventListenerManagerMapEntry();
}
class SameOriginCheckerImpl final : public nsIChannelEventSink,
public nsIInterfaceRequestor {
~SameOriginCheckerImpl() = default;
NS_DECL_ISUPPORTS
NS_DECL_NSICHANNELEVENTSINK
NS_DECL_NSIINTERFACEREQUESTOR
};
} // namespace
/**
* This class is used to determine whether or not the user is currently
* interacting with the browser. It listens to observer events to toggle the
* value of the sUserActive static.
*
* This class is an internal implementation detail.
* nsContentUtils::GetUserIsInteracting() should be used to access current
* user interaction status.
*/
class nsContentUtils::UserInteractionObserver final
: public nsIObserver,
public BackgroundHangAnnotator {
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIOBSERVER
void Init();
void Shutdown();
void AnnotateHang(BackgroundHangAnnotations& aAnnotations) override;
static Atomic<bool> sUserActive;
private:
~UserInteractionObserver() {}
};
/* static */
TimeDuration nsContentUtils::HandlingUserInputTimeout() {
return TimeDuration::FromMilliseconds(
StaticPrefs::dom_event_handling_user_input_time_limit());
}
// static
nsresult nsContentUtils::Init() {
if (sInitialized) {
NS_WARNING("Init() called twice");
return NS_OK;
}
nsHTMLTags::AddRefTable();
sNameSpaceManager = nsNameSpaceManager::GetInstance();
NS_ENSURE_TRUE(sNameSpaceManager, NS_ERROR_OUT_OF_MEMORY);
sXPConnect = nsXPConnect::XPConnect();
// We hold a strong ref to sXPConnect to ensure that it does not go away until
// nsLayoutStatics::Shutdown is happening. Otherwise ~nsXPConnect can be
// triggered by xpcModuleDtor late in shutdown and cause crashes due to
// various stuff already being torn down by then. Note that this means that
// we are effectively making sure that if we leak nsLayoutStatics then we also
// leak nsXPConnect.
NS_ADDREF(sXPConnect);
sSecurityManager = nsScriptSecurityManager::GetScriptSecurityManager();
if (!sSecurityManager) return NS_ERROR_FAILURE;
NS_ADDREF(sSecurityManager);
sSecurityManager->GetSystemPrincipal(&sSystemPrincipal);
MOZ_ASSERT(sSystemPrincipal);
RefPtr<NullPrincipal> nullPrincipal =
NullPrincipal::CreateWithoutOriginAttributes();
if (!nullPrincipal) {
return NS_ERROR_FAILURE;
}
nullPrincipal.forget(&sNullSubjectPrincipal);
nsresult rv = CallGetService(NS_IOSERVICE_CONTRACTID, &sIOService);
if (NS_FAILED(rv)) {
// This makes life easier, but we can live without it.
sIOService = nullptr;
}
sLineBreaker = mozilla::intl::LineBreaker::Create();
sWordBreaker = mozilla::intl::WordBreaker::Create();
if (!InitializeEventTable()) return NS_ERROR_FAILURE;
if (!sEventListenerManagersHash) {
static const PLDHashTableOps hash_table_ops = {
PLDHashTable::HashVoidPtrKeyStub, PLDHashTable::MatchEntryStub,
PLDHashTable::MoveEntryStub, EventListenerManagerHashClearEntry,
EventListenerManagerHashInitEntry};
sEventListenerManagersHash =
new PLDHashTable(&hash_table_ops, sizeof(EventListenerManagerMapEntry));
RegisterStrongMemoryReporter(new DOMEventListenerManagersHashReporter());
}
sBlockedScriptRunners = new AutoTArray<nsCOMPtr<nsIRunnable>, 8>;
#ifndef RELEASE_OR_BETA
sBypassCSSOMOriginCheck = getenv("MOZ_BYPASS_CSSOM_ORIGIN_CHECK");
#endif
nsDependentCString buildID(mozilla::PlatformBuildID());
sJSBytecodeMimeType =
new nsCString(NS_LITERAL_CSTRING("javascript/moz-bytecode-") + buildID);
Element::InitCCCallbacks();
Unused << nsRFPService::GetOrCreate();
nsCOMPtr<nsIUUIDGenerator> uuidGenerator =
do_GetService("@mozilla.org/uuid-generator;1", &rv);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
uuidGenerator.forget(&sUUIDGenerator);
if (XRE_IsParentProcess()) {
AsyncPrecreateStringBundles();
}
RefPtr<UserInteractionObserver> uio = new UserInteractionObserver();
uio->Init();
uio.forget(&sUserInteractionObserver);
sInitialized = true;
return NS_OK;
}
void nsContentUtils::GetShiftText(nsAString& text) {
if (!sShiftText) InitializeModifierStrings();
text.Assign(*sShiftText);
}
void nsContentUtils::GetControlText(nsAString& text) {
if (!sControlText) InitializeModifierStrings();
text.Assign(*sControlText);
}
void nsContentUtils::GetMetaText(nsAString& text) {
if (!sMetaText) InitializeModifierStrings();
text.Assign(*sMetaText);
}
void nsContentUtils::GetOSText(nsAString& text) {
if (!sOSText) {
InitializeModifierStrings();
}
text.Assign(*sOSText);
}
void nsContentUtils::GetAltText(nsAString& text) {
if (!sAltText) InitializeModifierStrings();
text.Assign(*sAltText);
}
void nsContentUtils::GetModifierSeparatorText(nsAString& text) {
if (!sModifierSeparator) InitializeModifierStrings();
text.Assign(*sModifierSeparator);
}
void nsContentUtils::InitializeModifierStrings() {
// load the display strings for the keyboard accelerators
nsCOMPtr<nsIStringBundleService> bundleService =
mozilla::services::GetStringBundleService();
nsCOMPtr<nsIStringBundle> bundle;
DebugOnly<nsresult> rv = NS_OK;
if (bundleService) {
rv = bundleService->CreateBundle(
"chrome://global-platform/locale/platformKeys.properties",
getter_AddRefs(bundle));
}
NS_ASSERTION(
NS_SUCCEEDED(rv) && bundle,
"chrome://global/locale/platformKeys.properties could not be loaded");
nsAutoString shiftModifier;
nsAutoString metaModifier;
nsAutoString osModifier;
nsAutoString altModifier;
nsAutoString controlModifier;
nsAutoString modifierSeparator;
if (bundle) {
// macs use symbols for each modifier key, so fetch each from the bundle,
// which also covers i18n
bundle->GetStringFromName("VK_SHIFT", shiftModifier);
bundle->GetStringFromName("VK_META", metaModifier);
bundle->GetStringFromName("VK_WIN", osModifier);
bundle->GetStringFromName("VK_ALT", altModifier);
bundle->GetStringFromName("VK_CONTROL", controlModifier);
bundle->GetStringFromName("MODIFIER_SEPARATOR", modifierSeparator);
}
// if any of these don't exist, we get an empty string
sShiftText = new nsString(shiftModifier);
sMetaText = new nsString(metaModifier);
sOSText = new nsString(osModifier);
sAltText = new nsString(altModifier);
sControlText = new nsString(controlModifier);
sModifierSeparator = new nsString(modifierSeparator);
}
mozilla::EventClassID nsContentUtils::GetEventClassIDFromMessage(
EventMessage aEventMessage) {
switch (aEventMessage) {
#define MESSAGE_TO_EVENT(name_, message_, type_, struct_) \
case message_: \
return struct_;
#include "mozilla/EventNameList.h"
#undef MESSAGE_TO_EVENT
default:
MOZ_ASSERT_UNREACHABLE("Invalid event message?");
return eBasicEventClass;
}
}
static nsAtom* GetEventTypeFromMessage(EventMessage aEventMessage) {
switch (aEventMessage) {
#define MESSAGE_TO_EVENT(name_, message_, type_, struct_) \
case message_: \
return nsGkAtoms::on##name_;
#include "mozilla/EventNameList.h"
#undef MESSAGE_TO_EVENT
default:
return nullptr;
}
}
// Because of SVG/SMIL we have several atoms mapped to the same
// id, but we can rely on MESSAGE_TO_EVENT to map id to only one atom.
static bool ShouldAddEventToStringEventTable(const EventNameMapping& aMapping) {
MOZ_ASSERT(aMapping.mAtom);
return GetEventTypeFromMessage(aMapping.mMessage) == aMapping.mAtom;
}
bool nsContentUtils::InitializeEventTable() {
NS_ASSERTION(!sAtomEventTable, "EventTable already initialized!");
NS_ASSERTION(!sStringEventTable, "EventTable already initialized!");
static const EventNameMapping eventArray[] = {
#define EVENT(name_, _message, _type, _class) \
{nsGkAtoms::on##name_, _type, _message, _class, false},
#define WINDOW_ONLY_EVENT EVENT
#define DOCUMENT_ONLY_EVENT EVENT
#define NON_IDL_EVENT EVENT
#include "mozilla/EventNameList.h"
#undef WINDOW_ONLY_EVENT
#undef NON_IDL_EVENT
#undef EVENT
{nullptr}};
sAtomEventTable =
new nsDataHashtable<nsRefPtrHashKey<nsAtom>, EventNameMapping>(
ArrayLength(eventArray));
sStringEventTable = new nsDataHashtable<nsStringHashKey, EventNameMapping>(
ArrayLength(eventArray));
sUserDefinedEvents = new nsTArray<RefPtr<nsAtom>>(64);
// Subtract one from the length because of the trailing null
for (uint32_t i = 0; i < ArrayLength(eventArray) - 1; ++i) {
MOZ_ASSERT(!sAtomEventTable->Lookup(eventArray[i].mAtom),
"Double-defining event name; fix your EventNameList.h");
sAtomEventTable->Put(eventArray[i].mAtom, eventArray[i]);
if (ShouldAddEventToStringEventTable(eventArray[i])) {
sStringEventTable->Put(
Substring(nsDependentAtomString(eventArray[i].mAtom), 2),
eventArray[i]);
}
}
return true;
}
void nsContentUtils::InitializeTouchEventTable() {
static bool sEventTableInitialized = false;
if (!sEventTableInitialized && sAtomEventTable && sStringEventTable) {
sEventTableInitialized = true;
static const EventNameMapping touchEventArray[] = {
#define EVENT(name_, _message, _type, _class)
#define TOUCH_EVENT(name_, _message, _type, _class) \
{nsGkAtoms::on##name_, _type, _message, _class},
#include "mozilla/EventNameList.h"
#undef TOUCH_EVENT
#undef EVENT
{nullptr}};
// Subtract one from the length because of the trailing null
for (uint32_t i = 0; i < ArrayLength(touchEventArray) - 1; ++i) {
sAtomEventTable->Put(touchEventArray[i].mAtom, touchEventArray[i]);
sStringEventTable->Put(
Substring(nsDependentAtomString(touchEventArray[i].mAtom), 2),
touchEventArray[i]);
}
}
}
static bool Is8bit(const nsAString& aString) {
static const char16_t EIGHT_BIT = char16_t(~0x00FF);
for (nsAString::const_char_iterator start = aString.BeginReading(),
end = aString.EndReading();
start != end; ++start) {
if (*start & EIGHT_BIT) {
return false;
}
}
return true;
}
nsresult nsContentUtils::Btoa(const nsAString& aBinaryData,
nsAString& aAsciiBase64String) {
if (!Is8bit(aBinaryData)) {
aAsciiBase64String.Truncate();
return NS_ERROR_DOM_INVALID_CHARACTER_ERR;
}
return Base64Encode(aBinaryData, aAsciiBase64String);
}
nsresult nsContentUtils::Atob(const nsAString& aAsciiBase64String,
nsAString& aBinaryData) {
if (!Is8bit(aAsciiBase64String)) {
aBinaryData.Truncate();
return NS_ERROR_DOM_INVALID_CHARACTER_ERR;
}
const char16_t* start = aAsciiBase64String.BeginReading();
const char16_t* cur = start;
const char16_t* end = aAsciiBase64String.EndReading();
bool hasWhitespace = false;
while (cur < end) {
if (nsContentUtils::IsHTMLWhitespace(*cur)) {
hasWhitespace = true;
break;
}
cur++;
}
nsresult rv;
if (hasWhitespace) {
nsString trimmedString;
if (!trimmedString.SetCapacity(aAsciiBase64String.Length(), fallible)) {
return NS_ERROR_DOM_INVALID_CHARACTER_ERR;
}
trimmedString.Append(start, cur - start);
while (cur < end) {
if (!nsContentUtils::IsHTMLWhitespace(*cur)) {
trimmedString.Append(*cur);
}
cur++;
}
rv = Base64Decode(trimmedString, aBinaryData);
} else {
rv = Base64Decode(aAsciiBase64String, aBinaryData);
}
if (NS_FAILED(rv) && rv == NS_ERROR_INVALID_ARG) {
return NS_ERROR_DOM_INVALID_CHARACTER_ERR;
}
return rv;
}
bool nsContentUtils::IsAutocompleteEnabled(
mozilla::dom::HTMLInputElement* aInput) {
MOZ_ASSERT(aInput, "aInput should not be null!");
nsAutoString autocomplete;
aInput->GetAutocomplete(autocomplete);
if (autocomplete.IsEmpty()) {
auto* form = aInput->GetForm();
if (!form) {
return true;
}
form->GetAutocomplete(autocomplete);
}
return !autocomplete.EqualsLiteral("off");
}
nsContentUtils::AutocompleteAttrState
nsContentUtils::SerializeAutocompleteAttribute(
const nsAttrValue* aAttr, nsAString& aResult,
AutocompleteAttrState aCachedState) {
if (!aAttr ||
aCachedState == nsContentUtils::eAutocompleteAttrState_Invalid) {
return aCachedState;
}
if (aCachedState == nsContentUtils::eAutocompleteAttrState_Valid) {
uint32_t atomCount = aAttr->GetAtomCount();
for (uint32_t i = 0; i < atomCount; i++) {
if (i != 0) {
aResult.Append(' ');
}
aResult.Append(nsDependentAtomString(aAttr->AtomAt(i)));
}
nsContentUtils::ASCIIToLower(aResult);
return aCachedState;
}
aResult.Truncate();
mozilla::dom::AutocompleteInfo info;
AutocompleteAttrState state =
InternalSerializeAutocompleteAttribute(aAttr, info);
if (state == eAutocompleteAttrState_Valid) {
// Concatenate the info fields.
aResult = info.mSection;
if (!info.mAddressType.IsEmpty()) {
if (!aResult.IsEmpty()) {
aResult += ' ';
}
aResult += info.mAddressType;
}
if (!info.mContactType.IsEmpty()) {
if (!aResult.IsEmpty()) {
aResult += ' ';
}
aResult += info.mContactType;
}
if (!info.mFieldName.IsEmpty()) {
if (!aResult.IsEmpty()) {
aResult += ' ';
}
aResult += info.mFieldName;
}
}
return state;
}
nsContentUtils::AutocompleteAttrState
nsContentUtils::SerializeAutocompleteAttribute(
const nsAttrValue* aAttr, mozilla::dom::AutocompleteInfo& aInfo,
AutocompleteAttrState aCachedState, bool aGrantAllValidValue) {
if (!aAttr ||
aCachedState == nsContentUtils::eAutocompleteAttrState_Invalid) {
return aCachedState;
}
return InternalSerializeAutocompleteAttribute(aAttr, aInfo,
aGrantAllValidValue);
}
/**
* Helper to validate the @autocomplete tokens.
*
* @return {AutocompleteAttrState} The state of the attribute (invalid/valid).
*/
nsContentUtils::AutocompleteAttrState
nsContentUtils::InternalSerializeAutocompleteAttribute(
const nsAttrValue* aAttrVal, mozilla::dom::AutocompleteInfo& aInfo,
bool aGrantAllValidValue) {
// No autocomplete attribute so we are done
if (!aAttrVal) {
return eAutocompleteAttrState_Invalid;
}
uint32_t numTokens = aAttrVal->GetAtomCount();
if (!numTokens) {
return eAutocompleteAttrState_Invalid;
}
uint32_t index = numTokens - 1;
nsString tokenString = nsDependentAtomString(aAttrVal->AtomAt(index));
AutocompleteCategory category;
nsAttrValue enumValue;
bool unsupported = false;
if (!aGrantAllValidValue) {
unsupported = enumValue.ParseEnumValue(
tokenString, kAutocompleteUnsupportedFieldNameTable, false);
if (unsupported) {
return eAutocompleteAttrState_Invalid;
}
}
nsAutoString str;
bool result =
enumValue.ParseEnumValue(tokenString, kAutocompleteFieldNameTable, false);
if (result) {
// Off/Automatic/Normal categories.
if (enumValue.Equals(NS_LITERAL_STRING("off"), eIgnoreCase) ||
enumValue.Equals(NS_LITERAL_STRING("on"), eIgnoreCase)) {
if (numTokens > 1) {
return eAutocompleteAttrState_Invalid;
}
enumValue.ToString(str);
ASCIIToLower(str);
aInfo.mFieldName.Assign(str);
aInfo.mCanAutomaticallyPersist =
!enumValue.Equals(NS_LITERAL_STRING("off"), eIgnoreCase);
return eAutocompleteAttrState_Valid;
}
// Only allow on/off if form autofill @autocomplete values aren't enabled
// and it doesn't grant all valid values.
if (!StaticPrefs::dom_forms_autocomplete_formautofill() &&
!aGrantAllValidValue) {
return eAutocompleteAttrState_Invalid;
}
// Normal category
if (numTokens > 3) {
return eAutocompleteAttrState_Invalid;
}
category = eAutocompleteCategory_NORMAL;
} else { // Check if the last token is of the contact category instead.
// Only allow on/off if form autofill @autocomplete values aren't enabled
// and it doesn't grant all valid values.
if (!StaticPrefs::dom_forms_autocomplete_formautofill() &&
!aGrantAllValidValue) {
return eAutocompleteAttrState_Invalid;
}
result = enumValue.ParseEnumValue(
tokenString, kAutocompleteContactFieldNameTable, false);
if (!result || numTokens > 4) {
return eAutocompleteAttrState_Invalid;
}
category = eAutocompleteCategory_CONTACT;
}
enumValue.ToString(str);
ASCIIToLower(str);
aInfo.mFieldName.Assign(str);
aInfo.mCanAutomaticallyPersist = !enumValue.ParseEnumValue(
tokenString, kAutocompleteNoPersistFieldNameTable, false);
// We are done if this was the only token.
if (numTokens == 1) {
return eAutocompleteAttrState_Valid;
}
--index;
tokenString = nsDependentAtomString(aAttrVal->AtomAt(index));
if (category == eAutocompleteCategory_CONTACT) {
if (!aGrantAllValidValue) {
unsupported = enumValue.ParseEnumValue(
tokenString, kAutocompleteUnsupportedContactFieldHintTable, false);
if (unsupported) {
return eAutocompleteAttrState_Invalid;
}
}
nsAttrValue contactFieldHint;
result = contactFieldHint.ParseEnumValue(
tokenString, kAutocompleteContactFieldHintTable, false);
if (result) {
nsAutoString contactFieldHintString;
contactFieldHint.ToString(contactFieldHintString);
ASCIIToLower(contactFieldHintString);
aInfo.mContactType.Assign(contactFieldHintString);
if (index == 0) {
return eAutocompleteAttrState_Valid;
}
--index;
tokenString = nsDependentAtomString(aAttrVal->AtomAt(index));
}
}
// Check for billing/shipping tokens
nsAttrValue fieldHint;
if (fieldHint.ParseEnumValue(tokenString, kAutocompleteFieldHintTable,
false)) {
nsString fieldHintString;
fieldHint.ToString(fieldHintString);
ASCIIToLower(fieldHintString);
aInfo.mAddressType.Assign(fieldHintString);
if (index == 0) {
return eAutocompleteAttrState_Valid;
}
--index;
tokenString = nsDependentAtomString(aAttrVal->AtomAt(index));
}
// Check for section-* token
const nsDependentSubstring& section = Substring(tokenString, 0, 8);
if (section.LowerCaseEqualsASCII("section-")) {
ASCIIToLower(tokenString);
aInfo.mSection.Assign(tokenString);
if (index == 0) {
return eAutocompleteAttrState_Valid;
}
}
// Clear the fields as the autocomplete attribute is invalid.
aInfo.mSection.Truncate();
aInfo.mAddressType.Truncate();
aInfo.mContactType.Truncate();
aInfo.mFieldName.Truncate();
return eAutocompleteAttrState_Invalid;
}
// Parse an integer according to HTML spec
int32_t nsContentUtils::ParseHTMLInteger(const nsAString& aValue,
ParseHTMLIntegerResultFlags* aResult) {
int result = eParseHTMLInteger_NoFlags;
nsAString::const_iterator iter, end;
aValue.BeginReading(iter);
aValue.EndReading(end);
while (iter != end && nsContentUtils::IsHTMLWhitespace(*iter)) {
result |= eParseHTMLInteger_NonStandard;
++iter;
}
if (iter == end) {
result |= eParseHTMLInteger_Error | eParseHTMLInteger_ErrorNoValue;
*aResult = (ParseHTMLIntegerResultFlags)result;
return 0;
}
int sign = 1;
if (*iter == char16_t('-')) {
sign = -1;
result |= eParseHTMLInteger_Negative;
++iter;
} else if (*iter == char16_t('+')) {
result |= eParseHTMLInteger_NonStandard;
++iter;
}
bool foundValue = false;
CheckedInt32 value = 0;
// Check for leading zeros first.
uint64_t leadingZeros = 0;
while (iter != end) {
if (*iter != char16_t('0')) {
break;
}
++leadingZeros;
foundValue = true;
++iter;
}
while (iter != end) {
if (*iter >= char16_t('0') && *iter <= char16_t('9')) {
value = (value * 10) + (*iter - char16_t('0')) * sign;
++iter;
if (!value.isValid()) {
result |= eParseHTMLInteger_Error | eParseHTMLInteger_ErrorOverflow;
break;
}
foundValue = true;
} else {
break;
}
}
if (!foundValue) {
result |= eParseHTMLInteger_Error | eParseHTMLInteger_ErrorNoValue;
}
if (value.isValid() &&
((leadingZeros > 1 || (leadingZeros == 1 && !(value == 0))) ||
(sign == -1 && value == 0))) {
result |= eParseHTMLInteger_NonStandard;
}
if (iter != end) {
result |= eParseHTMLInteger_DidNotConsumeAllInput;
}
*aResult = (ParseHTMLIntegerResultFlags)result;
return value.isValid() ? value.value() : 0;
}
#define SKIP_WHITESPACE(iter, end_iter, end_res) \
while ((iter) != (end_iter) && nsCRT::IsAsciiSpace(*(iter))) { \
++(iter); \
} \
if ((iter) == (end_iter)) { \
return (end_res); \
}
#define SKIP_ATTR_NAME(iter, end_iter) \
while ((iter) != (end_iter) && !nsCRT::IsAsciiSpace(*(iter)) && \
*(iter) != '=') { \
++(iter); \
}
bool nsContentUtils::GetPseudoAttributeValue(const nsString& aSource,
nsAtom* aName, nsAString& aValue) {
aValue.Truncate();
const char16_t* start = aSource.get();
const char16_t* end = start + aSource.Length();
const char16_t* iter;
while (start != end) {
SKIP_WHITESPACE(start, end, false)
iter = start;
SKIP_ATTR_NAME(iter, end)
if (start == iter) {
return false;
}
// Remember the attr name.
const nsDependentSubstring& attrName = Substring(start, iter);
// Now check whether this is a valid name="value" pair.
start = iter;
SKIP_WHITESPACE(start, end, false)
if (*start != '=') {
// No '=', so this is not a name="value" pair. We don't know
// what it is, and we have no way to handle it.
return false;
}
// Have to skip the value.
++start;
SKIP_WHITESPACE(start, end, false)
char16_t q = *start;
if (q != kQuote && q != kApostrophe) {
// Not a valid quoted value, so bail.
return false;
}
++start; // Point to the first char of the value.
iter = start;
while (iter != end && *iter != q) {
++iter;
}
if (iter == end) {
// Oops, unterminated quoted string.
return false;
}
// At this point attrName holds the name of the "attribute" and
// the value is between start and iter.
if (aName->Equals(attrName)) {
// We'll accumulate as many characters as possible (until we hit either
// the end of the string or the beginning of an entity). Chunks will be
// delimited by start and chunkEnd.
const char16_t* chunkEnd = start;
while (chunkEnd != iter) {
if (*chunkEnd == kLessThan) {
aValue.Truncate();
return false;
}
if (*chunkEnd == kAmpersand) {
aValue.Append(start, chunkEnd - start);
const char16_t* afterEntity = nullptr;
char16_t result[2];
uint32_t count = MOZ_XMLTranslateEntity(
reinterpret_cast<const char*>(chunkEnd),
reinterpret_cast<const char*>(iter),
reinterpret_cast<const char**>(&afterEntity), result);
if (count == 0) {
aValue.Truncate();
return false;
}
aValue.Append(result, count);
// Advance to after the entity and begin a new chunk.
start = chunkEnd = afterEntity;
} else {
++chunkEnd;
}
}
// Append remainder.
aValue.Append(start, iter - start);
return true;
}
// Resume scanning after the end of the attribute value (past the quote
// char).
start = iter + 1;
}
return false;
}
bool nsContentUtils::IsJavaScriptLanguage(const nsString& aName) {
return aName.LowerCaseEqualsLiteral("javascript") ||
aName.LowerCaseEqualsLiteral("livescript") ||
aName.LowerCaseEqualsLiteral("mocha") ||
aName.LowerCaseEqualsLiteral("javascript1.0") ||
aName.LowerCaseEqualsLiteral("javascript1.1") ||
aName.LowerCaseEqualsLiteral("javascript1.2") ||
aName.LowerCaseEqualsLiteral("javascript1.3") ||
aName.LowerCaseEqualsLiteral("javascript1.4") ||
aName.LowerCaseEqualsLiteral("javascript1.5");
}
void nsContentUtils::SplitMimeType(const nsAString& aValue, nsString& aType,
nsString& aParams) {
aType.Truncate();
aParams.Truncate();
int32_t semiIndex = aValue.FindChar(char16_t(';'));
if (-1 != semiIndex) {
aType = Substring(aValue, 0, semiIndex);
aParams =
Substring(aValue, semiIndex + 1, aValue.Length() - (semiIndex + 1));
aParams.StripWhitespace();
} else {
aType = aValue;
}
aType.StripWhitespace();
}
nsresult nsContentUtils::IsUserIdle(uint32_t aRequestedIdleTimeInMS,
bool* aUserIsIdle) {
nsresult rv;
nsCOMPtr<nsIIdleService> idleService =
do_GetService("@mozilla.org/widget/idleservice;1", &rv);
NS_ENSURE_SUCCESS(rv, rv);
uint32_t idleTimeInMS;
rv = idleService->GetIdleTime(&idleTimeInMS);
NS_ENSURE_SUCCESS(rv, rv);
*aUserIsIdle = idleTimeInMS >= aRequestedIdleTimeInMS;
return NS_OK;
}
/**
* A helper function that parses a sandbox attribute (of an <iframe> or a CSP
* directive) and converts it to the set of flags used internally.
*
* @param aSandboxAttr the sandbox attribute
* @return the set of flags (SANDBOXED_NONE if aSandboxAttr is
* null)
*/
uint32_t nsContentUtils::ParseSandboxAttributeToFlags(
const nsAttrValue* aSandboxAttr) {
if (!aSandboxAttr) {
return SANDBOXED_NONE;
}
uint32_t out = SANDBOX_ALL_FLAGS;
#define SANDBOX_KEYWORD(string, atom, flags) \
if (aSandboxAttr->Contains(nsGkAtoms::atom, eIgnoreCase)) { \
out &= ~(flags); \
}
#include "IframeSandboxKeywordList.h"
#undef SANDBOX_KEYWORD
return out;
}
/**
* A helper function that checks if a string matches a valid sandbox flag.
*
* @param aFlag the potential sandbox flag.
* @return true if the flag is a sandbox flag.
*/
bool nsContentUtils::IsValidSandboxFlag(const nsAString& aFlag) {
#define SANDBOX_KEYWORD(string, atom, flags) \
if (EqualsIgnoreASCIICase(nsDependentAtomString(nsGkAtoms::atom), aFlag)) { \
return true; \
}
#include "IframeSandboxKeywordList.h"
#undef SANDBOX_KEYWORD
return false;
}
/**
* A helper function that returns a string attribute corresponding to the
* sandbox flags.
*
* @param aFlags the sandbox flags
* @param aString the attribute corresponding to the flags (null if aFlags
* is zero)
*/
void nsContentUtils::SandboxFlagsToString(uint32_t aFlags, nsAString& aString) {
if (!aFlags) {
SetDOMStringToNull(aString);
return;
}
aString.Truncate();
#define SANDBOX_KEYWORD(string, atom, flags) \
if (!(aFlags & (flags))) { \
if (!aString.IsEmpty()) { \
aString.AppendLiteral(u" "); \
} \
aString.Append(nsDependentAtomString(nsGkAtoms::atom)); \
}
#include "IframeSandboxKeywordList.h"
#undef SANDBOX_KEYWORD
}
nsIBidiKeyboard* nsContentUtils::GetBidiKeyboard() {
if (!sBidiKeyboard) {
sBidiKeyboard = nsIWidget::CreateBidiKeyboard();
}
return sBidiKeyboard;
}
/**
* This is used to determine whether a character is in one of the classes
* which CSS says should be part of the first-letter. Currently, that is
* all punctuation classes (P*). Note that this is a change from CSS2
* which excluded Pc and Pd.
*
* https://www.w3.org/TR/css-pseudo-4/#first-letter-pseudo
* "Punctuation (i.e, characters that belong to the Punctuation (P*) Unicode
* general category [UAX44]) [...]"
*/
// static
bool nsContentUtils::IsFirstLetterPunctuation(uint32_t aChar) {
switch (mozilla::unicode::GetGeneralCategory(aChar)) {
case HB_UNICODE_GENERAL_CATEGORY_CONNECT_PUNCTUATION: /* Pc */
case HB_UNICODE_GENERAL_CATEGORY_DASH_PUNCTUATION: /* Pd */
case HB_UNICODE_GENERAL_CATEGORY_CLOSE_PUNCTUATION: /* Pe */
case HB_UNICODE_GENERAL_CATEGORY_FINAL_PUNCTUATION: /* Pf */
case HB_UNICODE_GENERAL_CATEGORY_INITIAL_PUNCTUATION: /* Pi */
case HB_UNICODE_GENERAL_CATEGORY_OTHER_PUNCTUATION: /* Po */
case HB_UNICODE_GENERAL_CATEGORY_OPEN_PUNCTUATION: /* Ps */
return true;
default:
return false;
}
}
// static
bool nsContentUtils::IsAlphanumeric(uint32_t aChar) {
nsUGenCategory cat = mozilla::unicode::GetGenCategory(aChar);
return (cat == nsUGenCategory::kLetter || cat == nsUGenCategory::kNumber);
}
// static
bool nsContentUtils::IsAlphanumericAt(const nsTextFragment* aFrag,
uint32_t aOffset) {
char16_t h = aFrag->CharAt(aOffset);
if (!IS_SURROGATE(h)) {
return IsAlphanumeric(h);
}
if (NS_IS_HIGH_SURROGATE(h) && aOffset + 1 < aFrag->GetLength()) {
char16_t l = aFrag->CharAt(aOffset + 1);
if (NS_IS_LOW_SURROGATE(l)) {
return IsAlphanumeric(SURROGATE_TO_UCS4(h, l));
}
}
return false;
}
/* static */
bool nsContentUtils::IsHTMLWhitespace(char16_t aChar) {
return aChar == char16_t(0x0009) || aChar == char16_t(0x000A) ||
aChar == char16_t(0x000C) || aChar == char16_t(0x000D) ||
aChar == char16_t(0x0020);
}
/* static */
bool nsContentUtils::IsHTMLWhitespaceOrNBSP(char16_t aChar) {
return IsHTMLWhitespace(aChar) || aChar == char16_t(0xA0);
}
/* static */
bool nsContentUtils::IsHTMLBlockLevelElement(nsIContent* aContent) {
return aContent->IsAnyOfHTMLElements(
nsGkAtoms::address, nsGkAtoms::article, nsGkAtoms::aside,
nsGkAtoms::blockquote, nsGkAtoms::center, nsGkAtoms::dir, nsGkAtoms::div,
nsGkAtoms::dl, // XXX why not dt and dd?
nsGkAtoms::fieldset,
nsGkAtoms::figure, // XXX shouldn't figcaption be on this list
nsGkAtoms::footer, nsGkAtoms::form, nsGkAtoms::h1, nsGkAtoms::h2,
nsGkAtoms::h3, nsGkAtoms::h4, nsGkAtoms::h5, nsGkAtoms::h6,
nsGkAtoms::header, nsGkAtoms::hgroup, nsGkAtoms::hr, nsGkAtoms::li,
nsGkAtoms::listing, nsGkAtoms::menu, nsGkAtoms::nav, nsGkAtoms::ol,
nsGkAtoms::p, nsGkAtoms::pre, nsGkAtoms::section, nsGkAtoms::table,
nsGkAtoms::ul, nsGkAtoms::xmp);
}
/* static */
bool nsContentUtils::ParseIntMarginValue(const nsAString& aString,
nsIntMargin& result) {
nsAutoString marginStr(aString);
marginStr.CompressWhitespace(true, true);
if (marginStr.IsEmpty()) {
return false;
}
int32_t start = 0, end = 0;
for (int count = 0; count < 4; count++) {
if ((uint32_t)end >= marginStr.Length()) return false;
// top, right, bottom, left
if (count < 3)
end = Substring(marginStr, start).FindChar(',');
else
end = Substring(marginStr, start).Length();
if (end <= 0) return false;
nsresult ec;
int32_t val = nsString(Substring(marginStr, start, end)).ToInteger(&ec);
if (NS_FAILED(ec)) return false;
switch (count) {
case 0:
result.top = val;
break;
case 1:
result.right = val;
break;
case 2:
result.bottom = val;
break;
case 3:
result.left = val;
break;
}
start += end + 1;
}
return true;
}
// static
int32_t nsContentUtils::ParseLegacyFontSize(const nsAString& aValue) {
nsAString::const_iterator iter, end;
aValue.BeginReading(iter);
aValue.EndReading(end);
while (iter != end && nsContentUtils::IsHTMLWhitespace(*iter)) {
++iter;
}
if (iter == end) {
return 0;
}
bool relative = false;
bool negate = false;
if (*iter == char16_t('-')) {
relative = true;
negate = true;
++iter;
} else if (*iter == char16_t('+')) {
relative = true;
++iter;
}
if (iter == end || *iter < char16_t('0') || *iter > char16_t('9')) {
return 0;
}
// We don't have to worry about overflow, since we can bail out as soon as
// we're bigger than 7.
int32_t value = 0;
while (iter != end && *iter >= char16_t('0') && *iter <= char16_t('9')) {
value = 10 * value + (*iter - char16_t('0'));
if (value >= 7) {
break;
}
++iter;
}
if (relative) {
if (negate) {
value = 3 - value;
} else {
value = 3 + value;
}
}
return clamped(value, 1, 7);
}
/* static */
void nsContentUtils::GetOfflineAppManifest(Document* aDocument, nsIURI** aURI) {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aDocument);
*aURI = nullptr;
if (aDocument->GetController().isSome()) {
return;
}
Element* docElement = aDocument->GetRootElement();
if (!docElement) {
return;
}
nsAutoString manifestSpec;
docElement->GetAttr(kNameSpaceID_None, nsGkAtoms::manifest, manifestSpec);
// Manifest URIs can't have fragment identifiers.
if (manifestSpec.IsEmpty() || manifestSpec.Contains('#')) {
return;
}
nsContentUtils::NewURIWithDocumentCharset(aURI, manifestSpec, aDocument,
aDocument->GetDocBaseURI());
}
/* static */
bool nsContentUtils::OfflineAppAllowed(nsIURI* aURI) {
nsCOMPtr<nsIOfflineCacheUpdateService> updateService =
components::OfflineCacheUpdate::Service();
if (!updateService) {
return false;
}
bool allowed;
nsresult rv = updateService->OfflineAppAllowedForURI(aURI, &allowed);
return NS_SUCCEEDED(rv) && allowed;
}
/* static */
bool nsContentUtils::OfflineAppAllowed(nsIPrincipal* aPrincipal) {
nsCOMPtr<nsIOfflineCacheUpdateService> updateService =
components::OfflineCacheUpdate::Service();
if (!updateService) {
return false;
}
bool allowed;
nsresult rv = updateService->OfflineAppAllowed(aPrincipal, &allowed);
return NS_SUCCEEDED(rv) && allowed;
}
/* static */
bool nsContentUtils::PrincipalAllowsL10n(nsIPrincipal* aPrincipal) {
// The system principal is always allowed.
if (IsSystemPrincipal(aPrincipal)) {
return true;
}
nsCOMPtr<nsIURI> uri;
nsresult rv = aPrincipal->GetURI(getter_AddRefs(uri));
NS_ENSURE_SUCCESS(rv, false);
bool hasFlags;
// Allow access to uris that cannot be loaded by web content.
rv = NS_URIChainHasFlags(uri, nsIProtocolHandler::URI_DANGEROUS_TO_LOAD,
&hasFlags);
NS_ENSURE_SUCCESS(rv, false);
if (hasFlags) {
return true;
}
// UI resources also get access.
rv = NS_URIChainHasFlags(uri, nsIProtocolHandler::URI_IS_UI_RESOURCE,
&hasFlags);
NS_ENSURE_SUCCESS(rv, false);
return hasFlags;
}
// static
void nsContentUtils::Shutdown() {
sInitialized = false;
nsHTMLTags::ReleaseTable();
NS_IF_RELEASE(sContentPolicyService);
sTriedToGetContentPolicy = false;
uint32_t i;
for (i = 0; i < PropertiesFile_COUNT; ++i) NS_IF_RELEASE(sStringBundles[i]);
NS_IF_RELEASE(sStringBundleService);
NS_IF_RELEASE(sConsoleService);
NS_IF_RELEASE(sXPConnect);
NS_IF_RELEASE(sSecurityManager);
NS_IF_RELEASE(sSystemPrincipal);
NS_IF_RELEASE(sNullSubjectPrincipal);
NS_IF_RELEASE(sIOService);
NS_IF_RELEASE(sUUIDGenerator);
sLineBreaker = nullptr;
sWordBreaker = nullptr;
sBidiKeyboard = nullptr;
delete sAtomEventTable;
sAtomEventTable = nullptr;
delete sStringEventTable;
sStringEventTable = nullptr;
delete sUserDefinedEvents;
sUserDefinedEvents = nullptr;
if (sEventListenerManagersHash) {
NS_ASSERTION(sEventListenerManagersHash->EntryCount() == 0,
"Event listener manager hash not empty at shutdown!");
// See comment above.
// However, we have to handle this table differently. If it still
// has entries, we want to leak it too, so that we can keep it alive
// in case any elements are destroyed. Because if they are, we need
// their event listener managers to be destroyed too, or otherwise
// it could leave dangling references in DOMClassInfo's preserved
// wrapper table.
if (sEventListenerManagersHash->EntryCount() == 0) {
delete sEventListenerManagersHash;
sEventListenerManagersHash = nullptr;
}
}
NS_ASSERTION(!sBlockedScriptRunners || sBlockedScriptRunners->Length() == 0,
"How'd this happen?");
delete sBlockedScriptRunners;
sBlockedScriptRunners = nullptr;
delete sShiftText;
sShiftText = nullptr;
delete sControlText;
sControlText = nullptr;
delete sMetaText;
sMetaText = nullptr;
delete sOSText;
sOSText = nullptr;
delete sAltText;
sAltText = nullptr;
delete sModifierSeparator;
sModifierSeparator = nullptr;
delete sJSBytecodeMimeType;
sJSBytecodeMimeType = nullptr;
NS_IF_RELEASE(sSameOriginChecker);
if (sUserInteractionObserver) {
sUserInteractionObserver->Shutdown();
NS_RELEASE(sUserInteractionObserver);
}
HTMLInputElement::Shutdown();
nsMappedAttributes::Shutdown();
}
/**
* Checks whether two nodes come from the same origin. aTrustedNode is
* considered 'safe' in that a user can operate on it.
*/
// static
nsresult nsContentUtils::CheckSameOrigin(const nsINode* aTrustedNode,
const nsINode* unTrustedNode) {
MOZ_ASSERT(aTrustedNode);
MOZ_ASSERT(unTrustedNode);
/*
* Get hold of each node's principal
*/
nsIPrincipal* trustedPrincipal = aTrustedNode->NodePrincipal();
nsIPrincipal* unTrustedPrincipal = unTrustedNode->NodePrincipal();
if (trustedPrincipal == unTrustedPrincipal) {
return NS_OK;
}
bool equal;
// XXXbz should we actually have a Subsumes() check here instead? Or perhaps
// a separate method for that, with callers using one or the other?
if (NS_FAILED(trustedPrincipal->Equals(unTrustedPrincipal, &equal)) ||
!equal) {
return NS_ERROR_DOM_PROP_ACCESS_DENIED;
}
return NS_OK;
}
// static
bool nsContentUtils::CanCallerAccess(nsIPrincipal* aSubjectPrincipal,
nsIPrincipal* aPrincipal) {
bool subsumes;
nsresult rv = aSubjectPrincipal->Subsumes(aPrincipal, &subsumes);
NS_ENSURE_SUCCESS(rv, false);
if (subsumes) {
return true;
}
// The subject doesn't subsume aPrincipal. Allow access only if the subject
// is chrome.
return IsCallerChrome();
}
// static
bool nsContentUtils::CanCallerAccess(const nsINode* aNode) {
nsIPrincipal* subject = SubjectPrincipal();
if (IsSystemPrincipal(subject)) {
return true;
}
if (aNode->ChromeOnlyAccess()) {
return false;
}
return CanCallerAccess(subject, aNode->NodePrincipal());
}
// static
bool nsContentUtils::CanCallerAccess(nsPIDOMWindowInner* aWindow) {
nsCOMPtr<nsIScriptObjectPrincipal> scriptObject = do_QueryInterface(aWindow);
NS_ENSURE_TRUE(scriptObject, false);
return CanCallerAccess(SubjectPrincipal(), scriptObject->GetPrincipal());
}
// static
bool nsContentUtils::PrincipalHasPermission(nsIPrincipal* aPrincipal,
const nsAtom* aPerm) {
// Chrome gets access by default.
if (IsSystemPrincipal(aPrincipal)) {
return true;
}
// Otherwise, only allow if caller is an addon with the permission.
return BasePrincipal::Cast(aPrincipal)->AddonHasPermission(aPerm);
}
// static
bool nsContentUtils::CallerHasPermission(JSContext* aCx, const nsAtom* aPerm) {
return PrincipalHasPermission(SubjectPrincipal(aCx), aPerm);
}
// static
nsIPrincipal* nsContentUtils::GetAttrTriggeringPrincipal(
nsIContent* aContent, const nsAString& aAttrValue,
nsIPrincipal* aSubjectPrincipal) {
nsIPrincipal* contentPrin = aContent ? aContent->NodePrincipal() : nullptr;
// If the subject principal is the same as the content principal, or no
// explicit subject principal was provided, we don't need to do any further
// checks. Just return the content principal.
if (contentPrin == aSubjectPrincipal || !aSubjectPrincipal) {
return contentPrin;
}
// Only use the subject principal if the URL string we are going to end up
// fetching is under the control of that principal, which is never the case
// for relative URLs.
if (aAttrValue.IsEmpty() ||
!IsAbsoluteURL(NS_ConvertUTF16toUTF8(aAttrValue))) {
return contentPrin;
}
// Only use the subject principal as the attr triggering principal if it
// should override the CSP of the node's principal.
if (BasePrincipal::Cast(aSubjectPrincipal)->OverridesCSP(contentPrin)) {
return aSubjectPrincipal;
}
return contentPrin;
}
// static
bool nsContentUtils::IsAbsoluteURL(const nsACString& aURL) {
nsAutoCString scheme;
if (NS_FAILED(net_ExtractURLScheme(aURL, scheme))) {
// If we can't extract a scheme, it's not an absolute URL.
return false;
}
// If it parses as an absolute StandardURL, it's definitely an absolute URL,
// so no need to check with the IO service.
if (net_IsAbsoluteURL(aURL)) {
return true;
}
uint32_t flags;
if (NS_SUCCEEDED(sIOService->GetProtocolFlags(scheme.get(), &flags))) {
return flags & nsIProtocolHandler::URI_NORELATIVE;
}
return false;
}
// static
bool nsContentUtils::InProlog(nsINode* aNode) {
MOZ_ASSERT(aNode, "missing node to nsContentUtils::InProlog");
nsINode* parent = aNode->GetParentNode();
if (!parent || !parent->IsDocument()) {
return false;
}
Document* doc = parent->AsDocument();
nsIContent* root = doc->GetRootElement();
return !root || doc->ComputeIndexOf(aNode) < doc->ComputeIndexOf(root);
}
bool nsContentUtils::IsCallerChrome() {
MOZ_ASSERT(NS_IsMainThread());
if (SubjectPrincipal() == sSystemPrincipal) {
return true;
}
// If the check failed, look for UniversalXPConnect on the cx compartment.
return xpc::IsUniversalXPConnectEnabled(GetCurrentJSContext());
}
#ifdef FUZZING
bool nsContentUtils::IsFuzzingEnabled() {
return StaticPrefs::fuzzing_enabled();
}
#endif
/* static */
bool nsContentUtils::IsCallerChromeOrElementTransformGettersEnabled(
JSContext* aCx, JSObject*) {
return ThreadsafeIsSystemCaller(aCx) ||
StaticPrefs::dom_element_transform_getters_enabled();
}
/* static */
bool nsContentUtils::ShouldResistFingerprinting() {
return StaticPrefs::privacy_resistFingerprinting();
}
bool nsContentUtils::ShouldResistFingerprinting(nsIDocShell* aDocShell) {
if (!aDocShell) {
return false;
}
return ShouldResistFingerprinting(aDocShell->GetDocument());
}
/* static */
bool nsContentUtils::ShouldResistFingerprinting(const Document* aDoc) {
if (!aDoc) {
return false;
}
bool isChrome = nsContentUtils::IsChromeDoc(aDoc);
return !isChrome && ShouldResistFingerprinting();
}
/* static */
bool nsContentUtils::ShouldResistFingerprinting(nsIPrincipal* aPrincipal) {
if (!aPrincipal) {
return false;
}
bool isChrome = nsContentUtils::IsSystemPrincipal(aPrincipal);
return !isChrome && ShouldResistFingerprinting();
}
/* static */
bool nsContentUtils::ShouldResistFingerprinting(WorkerPrivate* aWorkerPrivate) {
if (!aWorkerPrivate) {
// We may be on a non-worker thread!
return ShouldResistFingerprinting();
}
bool isChrome = aWorkerPrivate->UsesSystemPrincipal();
return !isChrome && ShouldResistFingerprinting();
}
/* static */
bool nsContentUtils::UseStandinsForNativeColors() {
return ShouldResistFingerprinting() ||
StaticPrefs::ui_use_standins_for_native_colors();
}
/* static */
void nsContentUtils::CalcRoundedWindowSizeForResistingFingerprinting(
int32_t aChromeWidth, int32_t aChromeHeight, int32_t aScreenWidth,
int32_t aScreenHeight, int32_t aInputWidth, int32_t aInputHeight,
bool aSetOuterWidth, bool aSetOuterHeight, int32_t* aOutputWidth,
int32_t* aOutputHeight) {
MOZ_ASSERT(aOutputWidth);
MOZ_ASSERT(aOutputHeight);
int32_t availContentWidth = 0;
int32_t availContentHeight = 0;
availContentWidth = std::min(StaticPrefs::privacy_window_maxInnerWidth(),
aScreenWidth - aChromeWidth);
#ifdef MOZ_WIDGET_GTK
// In the GTK window, it will not report outside system decorations
// when we get available window size, see Bug 581863. So, we leave a
// 40 pixels space for them when calculating the available content
// height. It is not necessary for the width since the content width
// is usually pretty much the same as the chrome width.
availContentHeight = std::min(StaticPrefs::privacy_window_maxInnerHeight(),
(-40 + aScreenHeight) - aChromeHeight);
#else
availContentHeight = std::min(StaticPrefs::privacy_window_maxInnerHeight(),
aScreenHeight - aChromeHeight);
#endif
// Ideally, we'd like to round window size to 1000x1000, but the
// screen space could be too small to accommodate this size in some
// cases. If it happens, we would round the window size to the nearest
// 200x100.
availContentWidth = availContentWidth - (availContentWidth % 200);
availContentHeight = availContentHeight - (availContentHeight % 100);
// If aIsOuter is true, we are setting the outer window. So we
// have to consider the chrome UI.
int32_t chromeOffsetWidth = aSetOuterWidth ? aChromeWidth : 0;
int32_t chromeOffsetHeight = aSetOuterHeight ? aChromeHeight : 0;
int32_t resultWidth = 0, resultHeight = 0;
// if the original size is greater than the maximum available size, we set
// it to the maximum size. And if the original value is less than the
// minimum rounded size, we set it to the minimum 200x100.
if (aInputWidth > (availContentWidth + chromeOffsetWidth)) {
resultWidth = availContentWidth + chromeOffsetWidth;
} else if (aInputWidth < (200 + chromeOffsetWidth)) {
resultWidth = 200 + chromeOffsetWidth;
} else {
// Otherwise, we round the window to the nearest upper rounded 200x100.
resultWidth = NSToIntCeil((aInputWidth - chromeOffsetWidth) / 200.0) * 200 +
chromeOffsetWidth;
}
if (aInputHeight > (availContentHeight + chromeOffsetHeight)) {
resultHeight = availContentHeight + chromeOffsetHeight;
} else if (aInputHeight < (100 + chromeOffsetHeight)) {
resultHeight = 100 + chromeOffsetHeight;
} else {
resultHeight =
NSToIntCeil((aInputHeight - chromeOffsetHeight) / 100.0) * 100 +
chromeOffsetHeight;
}
*aOutputWidth = resultWidth;
*aOutputHeight = resultHeight;
}
bool nsContentUtils::ThreadsafeIsCallerChrome() {
return NS_IsMainThread() ? IsCallerChrome()
: IsCurrentThreadRunningChromeWorker();
}
bool nsContentUtils::IsCallerContentXBL() {
JSContext* cx = GetCurrentJSContext();
if (!cx) return false;
JS::Realm* realm = JS::GetCurrentRealmOrNull(cx);
if (!realm) return false;
// For remote XUL, we run XBL in the XUL scope. Given that we care about
// compat and not security for remote XUL, just always claim to be XBL.
if (!xpc::AllowContentXBLScope(realm)) {
MOZ_ASSERT(
nsContentUtils::AllowXULXBLForPrincipal(xpc::GetRealmPrincipal(realm)));
return true;
}
return xpc::IsContentXBLScope(realm);
}
bool nsContentUtils::IsCallerUAWidget() {
JSContext* cx = GetCurrentJSContext();
if (!cx) {
return false;
}
JS::Realm* realm = JS::GetCurrentRealmOrNull(cx);
if (!realm) {
return false;
}
return xpc::IsUAWidgetScope(realm);
}
bool nsContentUtils::IsSystemCaller(JSContext* aCx) {
// Note that SubjectPrincipal() assumes we are in a compartment here.
return SubjectPrincipal(aCx) == sSystemPrincipal;
}
bool nsContentUtils::ThreadsafeIsSystemCaller(JSContext* aCx) {
CycleCollectedJSContext* ccjscx = CycleCollectedJSContext::Get();
MOZ_ASSERT(ccjscx->Context() == aCx);
return ccjscx->IsSystemCaller();
}
// static
bool nsContentUtils::LookupBindingMember(
JSContext* aCx, nsIContent* aContent, JS::Handle<jsid> aId,
JS::MutableHandle<JS::PropertyDescriptor> aDesc) {
nsXBLBinding* binding = aContent->GetXBLBinding();
if (!binding) return true;
return binding->LookupMember(aCx, aId, aDesc);
}
// static
nsINode* nsContentUtils::GetCrossDocParentNode(nsINode* aChild) {
MOZ_ASSERT(aChild, "The child is null!");
nsINode* parent = aChild->GetParentNode();
if (parent && parent->IsContent() && aChild->IsContent()) {
parent = aChild->AsContent()->GetFlattenedTreeParent();
}
if (parent || !aChild->IsDocument()) {
return parent;
}
Document* doc = aChild->AsDocument();
Document* parentDoc = doc->GetInProcessParentDocument();
return parentDoc ? parentDoc->FindContentForSubDocument(doc) : nullptr;
}
bool nsContentUtils::ContentIsHostIncludingDescendantOf(
const nsINode* aPossibleDescendant, const nsINode* aPossibleAncestor) {
MOZ_ASSERT(aPossibleDescendant, "The possible descendant is null!");
MOZ_ASSERT(aPossibleAncestor, "The possible ancestor is null!");
do {
if (aPossibleDescendant == aPossibleAncestor) return true;
if (aPossibleDescendant->IsDocumentFragment()) {
aPossibleDescendant =
aPossibleDescendant->AsDocumentFragment()->GetHost();
} else {
aPossibleDescendant = aPossibleDescendant->GetParentNode();
}
} while (aPossibleDescendant);
return false;
}
// static
bool nsContentUtils::ContentIsCrossDocDescendantOf(nsINode* aPossibleDescendant,
nsINode* aPossibleAncestor) {
MOZ_ASSERT(aPossibleDescendant, "The possible descendant is null!");
MOZ_ASSERT(aPossibleAncestor, "The possible ancestor is null!");
do {
if (aPossibleDescendant == aPossibleAncestor) return true;
aPossibleDescendant = GetCrossDocParentNode(aPossibleDescendant);
} while (aPossibleDescendant);
return false;
}
// static
bool nsContentUtils::ContentIsFlattenedTreeDescendantOf(
const nsINode* aPossibleDescendant, const nsINode* aPossibleAncestor) {
MOZ_ASSERT(aPossibleDescendant, "The possible descendant is null!");
MOZ_ASSERT(aPossibleAncestor, "The possible ancestor is null!");
do {
if (aPossibleDescendant == aPossibleAncestor) {
return true;
}
aPossibleDescendant = aPossibleDescendant->GetFlattenedTreeParentNode();
} while (aPossibleDescendant);
return false;
}
// static
bool nsContentUtils::ContentIsFlattenedTreeDescendantOfForStyle(
const nsINode* aPossibleDescendant, const nsINode* aPossibleAncestor) {
MOZ_ASSERT(aPossibleDescendant, "The possible descendant is null!");
MOZ_ASSERT(aPossibleAncestor, "The possible ancestor is null!");
do {
if (aPossibleDescendant == aPossibleAncestor) {
return true;
}
aPossibleDescendant =
aPossibleDescendant->GetFlattenedTreeParentNodeForStyle();
} while (aPossibleDescendant);
return false;
}
// static
nsINode* nsContentUtils::Retarget(nsINode* aTargetA, nsINode* aTargetB) {
while (true && aTargetA) {
// If A's root is not a shadow root...
nsINode* root = aTargetA->SubtreeRoot();
if (!root->IsShadowRoot()) {
// ...then return A.
return aTargetA;
}
// or A's root is a shadow-including inclusive ancestor of B...
if (aTargetB->IsShadowIncludingInclusiveDescendantOf(root)) {
// ...then return A.
return aTargetA;
}
aTargetA = ShadowRoot::FromNode(root)->GetHost();
}
return nullptr;
}
// static
nsresult nsContentUtils::GetAncestors(nsINode* aNode,
nsTArray<nsINode*>& aArray) {
while (aNode) {
aArray.AppendElement(aNode);
aNode = aNode->GetParentNode();
}
return NS_OK;
}
// static
nsresult nsContentUtils::GetAncestorsAndOffsets(
nsINode* aNode, int32_t aOffset, nsTArray<nsIContent*>* aAncestorNodes,
nsTArray<int32_t>* aAncestorOffsets) {
NS_ENSURE_ARG_POINTER(aNode);
if (!aNode->IsContent()) {
return NS_ERROR_FAILURE;
}
nsIContent* content = aNode->AsContent();
if (!aAncestorNodes->IsEmpty()) {
NS_WARNING("aAncestorNodes is not empty");
aAncestorNodes->Clear();
}
if (!aAncestorOffsets->IsEmpty()) {
NS_WARNING("aAncestorOffsets is not empty");
aAncestorOffsets->Clear();
}
// insert the node itself
aAncestorNodes->AppendElement(content);
aAncestorOffsets->AppendElement(aOffset);
// insert all the ancestors
nsIContent* child = content;
nsIContent* parent = child->GetParent();
while (parent) {
aAncestorNodes->AppendElement(parent);
aAncestorOffsets->AppendElement(parent->ComputeIndexOf(child));
child = parent;
parent = parent->GetParent();
}
return NS_OK;
}
template <typename Node, typename GetParentFunc>
static Node* GetCommonAncestorInternal(Node* aNode1, Node* aNode2,
GetParentFunc aGetParentFunc) {
MOZ_ASSERT(aNode1 != aNode2);
// Build the chain of parents
AutoTArray<Node*, 30> parents1, parents2;
do {
parents1.AppendElement(aNode1);
aNode1 = aGetParentFunc(aNode1);
} while (aNode1);
do {
parents2.AppendElement(aNode2);
aNode2 = aGetParentFunc(aNode2);
} while (aNode2);
// Find where the parent chain differs
uint32_t pos1 = parents1.Length();
uint32_t pos2 = parents2.Length();
Node* parent = nullptr;
uint32_t len;
for (len = std::min(pos1, pos2); len > 0; --len) {
Node* child1 = parents1.ElementAt(--pos1);
Node* child2 = parents2.ElementAt(--pos2);
if (child1 != child2) {
break;
}
parent = child1;
}
return parent;
}
/* static */
nsINode* nsContentUtils::GetCommonAncestorHelper(nsINode* aNode1,
nsINode* aNode2) {
return GetCommonAncestorInternal(
aNode1, aNode2, [](nsINode* aNode) { return aNode->GetParentNode(); });
}
/* static */
nsIContent* nsContentUtils::GetCommonFlattenedTreeAncestorHelper(
nsIContent* aContent1, nsIContent* aContent2) {
return GetCommonAncestorInternal(
aContent1, aContent2,
[](nsIContent* aContent) { return aContent->GetFlattenedTreeParent(); });
}
/* static */
Element* nsContentUtils::GetCommonFlattenedTreeAncestorForStyle(
Element* aElement1, Element* aElement2) {
return GetCommonAncestorInternal(aElement1, aElement2, [](Element* aElement) {
return aElement->GetFlattenedTreeParentElementForStyle();
});
}
/* static */
bool nsContentUtils::PositionIsBefore(nsINode* aNode1, nsINode* aNode2,
int32_t* aNode1Index,
int32_t* aNode2Index) {
// Note, CompareDocumentPosition takes the latter params in different order.
return (aNode2->CompareDocumentPosition(*aNode1, aNode2Index, aNode1Index) &
(Node_Binding::DOCUMENT_POSITION_PRECEDING |
Node_Binding::DOCUMENT_POSITION_DISCONNECTED)) ==
Node_Binding::DOCUMENT_POSITION_PRECEDING;
}
/* static */
int32_t nsContentUtils::ComparePoints(const nsINode* aParent1, int32_t aOffset1,
const nsINode* aParent2, int32_t aOffset2,
bool* aDisconnected,
ComparePointsCache* aParent1Cache) {
if (aParent1 == aParent2) {
// XXX This is odd. aOffset1 and/or aOffset2 may be -1, e.g., it's result
// of nsINode::ComputeIndexOf(), but this compares such invalid
// offset with valid offset.
return aOffset1 < aOffset2 ? -1 : aOffset1 > aOffset2 ? 1 : 0;
}
AutoTArray<const nsINode*, 32> parents1, parents2;
const nsINode* node1 = aParent1;
const nsINode* node2 = aParent2;
do {
parents1.AppendElement(node1);
node1 = node1->GetParentNode();
} while (node1);
do {
parents2.AppendElement(node2);
node2 = node2->GetParentNode();
} while (node2);
uint32_t pos1 = parents1.Length() - 1;
uint32_t pos2 = parents2.Length() - 1;
bool disconnected = parents1.ElementAt(pos1) != parents2.ElementAt(pos2);
if (aDisconnected) {
*aDisconnected = disconnected;
}
if (disconnected) {
NS_ASSERTION(aDisconnected, "unexpected disconnected nodes");
return 1;
}
// Find where the parent chains differ
const nsINode* parent = parents1.ElementAt(pos1);
uint32_t len;
for (len = std::min(pos1, pos2); len > 0; --len) {
const nsINode* child1 = parents1.ElementAt(--pos1);
const nsINode* child2 = parents2.ElementAt(--pos2);
if (child1 != child2) {
int32_t child1index = aParent1Cache
? aParent1Cache->ComputeIndexOf(parent, child1)
: parent->ComputeIndexOf(child1);
return child1index < parent->ComputeIndexOf(child2) ? -1 : 1;
}
parent = child1;
}
// The parent chains never differed, so one of the nodes is an ancestor of
// the other
NS_ASSERTION(!pos1 || !pos2,
"should have run out of parent chain for one of the nodes");
if (!pos1) {
const nsINode* child2 = parents2.ElementAt(--pos2);
// XXX aOffset1 may be -1 as mentioned above. So, why does this return
// it's *before* of the valid DOM point?
return aOffset1 <= parent->ComputeIndexOf(child2) ? -1 : 1;
}
const nsINode* child1 = parents1.ElementAt(--pos1);
// XXX aOffset2 may be -1 as mentioned above. So, why does this return it's
// *after* of the valid DOM point?
int32_t child1index = aParent1Cache
? aParent1Cache->ComputeIndexOf(parent, child1)
: parent->ComputeIndexOf(child1);
return child1index < aOffset2 ? -1 : 1;
}
// static
nsINode* nsContentUtils::GetCommonAncestorUnderInteractiveContent(
nsINode* aNode1, nsINode* aNode2) {
if (!aNode1 || !aNode2) {
return nullptr;
}
if (aNode1 == aNode2) {
return aNode1;
}
// Build the chain of parents
AutoTArray<nsINode*, 30> parents1;
do {
parents1.AppendElement(aNode1);
if (aNode1->IsElement() &&
aNode1->AsElement()->IsInteractiveHTMLContent(true)) {
break;
}
aNode1 = aNode1->GetFlattenedTreeParentNode();
} while (aNode1);
AutoTArray<nsINode*, 30> parents2;
do {
parents2.AppendElement(aNode2);
if (aNode2->IsElement() &&
aNode2->AsElement()->IsInteractiveHTMLContent(true)) {
break;
}
aNode2 = aNode2->GetFlattenedTreeParentNode();
} while (aNode2);
// Find where the parent chain differs
uint32_t pos1 = parents1.Length();
uint32_t pos2 = parents2.Length();
nsINode* parent = nullptr;
for (uint32_t len = std::min(pos1, pos2); len > 0; --len) {
nsINode* child1 = parents1.ElementAt(--pos1);
nsINode* child2 = parents2.ElementAt(--pos2);
if (child1 != child2) {
break;
}
parent = child1;
}
return parent;
}
/* static */
template <typename FPT, typename FRT, typename SPT, typename SRT>
int32_t nsContentUtils::ComparePoints(
const RangeBoundaryBase<FPT, FRT>& aFirstBoundary,
const RangeBoundaryBase<SPT, SRT>& aSecondBoundary, bool* aDisconnected) {
if (NS_WARN_IF(!aFirstBoundary.IsSet()) ||
NS_WARN_IF(!aSecondBoundary.IsSet())) {
return -1;
}
// XXX Re-implement this without calling `Offset()` as far as possible,
// and the other overload should be an alias of this.
return ComparePoints(aFirstBoundary.Container(), aFirstBoundary.Offset(),
aSecondBoundary.Container(), aSecondBoundary.Offset(),
aDisconnected);
}
inline bool IsCharInSet(const char* aSet, const char16_t aChar) {
char16_t ch;
while ((ch = *aSet)) {
if (aChar == char16_t(ch)) {
return true;
}
++aSet;
}
return false;
}
/**
* This method strips leading/trailing chars, in given set, from string.
*/
// static
const nsDependentSubstring nsContentUtils::TrimCharsInSet(
const char* aSet, const nsAString& aValue) {
nsAString::const_iterator valueCurrent, valueEnd;
aValue.BeginReading(valueCurrent);
aValue.EndReading(valueEnd);
// Skip characters in the beginning
while (valueCurrent != valueEnd) {
if (!IsCharInSet(aSet, *valueCurrent)) {
break;
}
++valueCurrent;
}
if (valueCurrent != valueEnd) {
for (;;) {
--valueEnd;
if (!IsCharInSet(aSet, *valueEnd)) {
break;
}
}
++valueEnd; // Step beyond the last character we want in the value.
}
// valueEnd should point to the char after the last to copy
return Substring(valueCurrent, valueEnd);
}
/**
* This method strips leading and trailing whitespace from a string.
*/
// static
template <bool IsWhitespace(char16_t)>
const nsDependentSubstring nsContentUtils::TrimWhitespace(const nsAString& aStr,
bool aTrimTrailing) {
nsAString::const_iterator start, end;
aStr.BeginReading(start);
aStr.EndReading(end);
// Skip whitespace characters in the beginning
while (start != end && IsWhitespace(*start)) {
++start;
}
if (aTrimTrailing) {
// Skip whitespace characters in the end.
while (end != start) {
--end;
if (!IsWhitespace(*end)) {
// Step back to the last non-whitespace character.
++end;
break;
}
}
}
// Return a substring for the string w/o leading and/or trailing
// whitespace
return Substring(start, end);
}
// Declaring the templates we are going to use avoid linking issues without
// inlining the method. Considering there is not so much spaces checking
// methods we can consider this to be better than inlining.
template const nsDependentSubstring
nsContentUtils::TrimWhitespace<nsCRT::IsAsciiSpace>(const nsAString&, bool);
template const nsDependentSubstring nsContentUtils::TrimWhitespace<
nsContentUtils::IsHTMLWhitespace>(const nsAString&, bool);
template const nsDependentSubstring nsContentUtils::TrimWhitespace<
nsContentUtils::IsHTMLWhitespaceOrNBSP>(const nsAString&, bool);
static inline void KeyAppendSep(nsACString& aKey) {
if (!aKey.IsEmpty()) {
aKey.Append('>');
}
}
static inline void KeyAppendString(const nsAString& aString, nsACString& aKey) {
KeyAppendSep(aKey);
// Could escape separator here if collisions happen. > is not a legal char
// for a name or type attribute, so we should be safe avoiding that extra
// work.
AppendUTF16toUTF8(aString, aKey);
}
static inline void KeyAppendString(const nsACString& aString,
nsACString& aKey) {
KeyAppendSep(aKey);
// Could escape separator here if collisions happen. > is not a legal char
// for a name or type attribute, so we should be safe avoiding that extra
// work.
aKey.Append(aString);
}
static inline void KeyAppendInt(int32_t aInt, nsACString& aKey) {
KeyAppendSep(aKey);
aKey.AppendInt(aInt);
}
static inline bool IsAutocompleteOff(const nsIContent* aContent) {
return aContent->IsElement() &&
aContent->AsElement()->AttrValueIs(
kNameSpaceID_None, nsGkAtoms::autocomplete,
NS_LITERAL_STRING("off"), eIgnoreCase);
}
/*static*/
void nsContentUtils::GenerateStateKey(nsIContent* aContent, Document* aDocument,
nsACString& aKey) {
MOZ_ASSERT(aContent);
aKey.Truncate();
uint32_t partID = aDocument ? aDocument->GetPartID() : 0;
// Don't capture state for anonymous content
if (aContent->IsInAnonymousSubtree()) {
return;
}
if (IsAutocompleteOff(aContent)) {
return;
}
RefPtr<Document> doc = aContent->GetUncomposedDoc();
KeyAppendInt(partID, aKey); // first append a partID
bool generatedUniqueKey = false;
if (doc && doc->IsHTMLOrXHTML()) {
nsHTMLDocument* htmlDoc = doc->AsHTMLDocument();
// If we have a form control and can calculate form information, use that
// as the key - it is more reliable than just recording position in the
// DOM.
// XXXbz Is it, really? We have bugs on this, I think...
// Important to have a unique key, and tag/type/name may not be.
//
// The format of the key depends on whether the control has a form,
// and whether the element was parser inserted:
//
// [Has Form, Parser Inserted]:
// fp>type>FormNum>IndOfControlInForm>FormName>name
//
// [No Form, Parser Inserted]:
// dp>type>ControlNum>name
//
// [Has Form, Not Parser Inserted]:
// fn>type>IndOfFormInDoc>IndOfControlInForm>FormName>name
//
// [No Form, Not Parser Inserted]:
// dn>type>IndOfControlInDoc>name
//
// XXX We don't need to use index if name is there
// XXXbz We don't? Why not? I don't follow.
//
nsCOMPtr<nsIFormControl> control(do_QueryInterface(aContent));
if (control) {
// Get the control number if this was a parser inserted element from the
// network.
int32_t controlNumber =
control->GetParserInsertedControlNumberForStateKey();
bool parserInserted = controlNumber != -1;
RefPtr<nsContentList> htmlForms;
RefPtr<nsContentList> htmlFormControls;
if (!parserInserted) {
// Getting these lists is expensive, as we need to keep them up to date
// as the document loads, so we avoid it if we don't need them.
htmlDoc->GetFormsAndFormControls(getter_AddRefs(htmlForms),
getter_AddRefs(htmlFormControls));
}
// Append the control type
KeyAppendInt(control->ControlType(), aKey);
// If in a form, add form name / index of form / index in form
HTMLFormElement* formElement = control->GetFormElement();
if (formElement) {
if (IsAutocompleteOff(formElement)) {
aKey.Truncate();
return;
}
// Append the form number, if this is a parser inserted control, or
// the index of the form in the document otherwise.
bool appendedForm = false;
if (parserInserted) {
MOZ_ASSERT(formElement->GetFormNumberForStateKey() != -1,
"when generating a state key for a parser inserted form "
"control we should have a parser inserted <form> element");
KeyAppendString(NS_LITERAL_CSTRING("fp"), aKey);
KeyAppendInt(formElement->GetFormNumberForStateKey(), aKey);
appendedForm = true;
} else {
KeyAppendString(NS_LITERAL_CSTRING("fn"), aKey);
int32_t index = htmlForms->IndexOf(formElement, false);
if (index <= -1) {
//
// XXX HACK this uses some state that was dumped into the document
// specifically to fix bug 138892. What we are trying to do is
// *guess* which form this control's state is found in, with the
// highly likely guess that the highest form parsed so far is the
// one. This code should not be on trunk, only branch.
//
index = htmlDoc->GetNumFormsSynchronous() - 1;
}
if (index > -1) {
KeyAppendInt(index, aKey);
appendedForm = true;
}
}
if (appendedForm) {
// Append the index of the control in the form
int32_t index = formElement->IndexOfControl(control);
if (index > -1) {
KeyAppendInt(index, aKey);
generatedUniqueKey = true;
}
}
// Append the form name
nsAutoString formName;
formElement->GetAttr(kNameSpaceID_None, nsGkAtoms::name, formName);
KeyAppendString(formName, aKey);
} else {
// Not in a form. Append the control number, if this is a parser
// inserted control, or the index of the control in the document
// otherwise.
if (parserInserted) {
KeyAppendString(NS_LITERAL_CSTRING("dp"), aKey);
KeyAppendInt(control->GetParserInsertedControlNumberForStateKey(),
aKey);
generatedUniqueKey = true;
} else {
KeyAppendString(NS_LITERAL_CSTRING("dn"), aKey);
int32_t index = htmlFormControls->IndexOf(aContent, true);
if (index > -1) {
KeyAppendInt(index, aKey);
generatedUniqueKey = true;
}
}
// Append the control name
nsAutoString name;
aContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::name,
name);
KeyAppendString(name, aKey);
}
}
}
if (!generatedUniqueKey) {
// Either we didn't have a form control or we aren't in an HTML document so
// we can't figure out form info. Append the tag name if it's an element
// to avoid restoring state for one type of element on another type.
if (aContent->IsElement()) {
KeyAppendString(nsDependentAtomString(aContent->NodeInfo()->NameAtom()),
aKey);
} else {
// Append a character that is not "d" or "f" to disambiguate from
// the case when we were a form control in an HTML document.
KeyAppendString(NS_LITERAL_CSTRING("o"), aKey);
}
// Now start at aContent and append the indices of it and all its ancestors
// in their containers. That should at least pin down its position in the
// DOM...
nsINode* parent = aContent->GetParentNode();
nsINode* content = aContent;
while (parent) {
KeyAppendInt(parent->ComputeIndexOf(content), aKey);
content = parent;
parent = content->GetParentNode();
}
}
}
// static
nsIPrincipal* nsContentUtils::SubjectPrincipal(JSContext* aCx) {
MOZ_ASSERT(NS_IsMainThread());
// As opposed to SubjectPrincipal(), we do in fact assume that
// we're in a realm here; anyone who calls this function in
// situations where that's not the case is doing it wrong.
JS::Realm* realm = js::GetContextRealm(aCx);
MOZ_ASSERT(realm);
JSPrincipals* principals = JS::GetRealmPrincipals(realm);
return nsJSPrincipals::get(principals);
}
// static
nsIPrincipal* nsContentUtils::SubjectPrincipal() {
MOZ_ASSERT(IsInitialized());
MOZ_ASSERT(NS_IsMainThread());
JSContext* cx = GetCurrentJSContext();
if (!cx) {
MOZ_CRASH(
"Accessing the Subject Principal without an AutoJSAPI on the stack is "
"forbidden");
}
JS::Realm* realm = js::GetContextRealm(cx);
// When an AutoJSAPI is instantiated, we are in a null realm until the
// first JSAutoRealm, which is kind of a purgatory as far as permissions
// go. It would be nice to just hard-abort if somebody does a security check
// in this purgatory zone, but that would be too fragile, since it could be
// triggered by random IsCallerChrome() checks 20-levels deep.
//
// So we want to return _something_ here - and definitely not the System
// Principal, since that would make an AutoJSAPI a very dangerous thing to
// instantiate.
//
// The natural thing to return is a null principal. Ideally, we'd return a
// different null principal each time, to avoid any unexpected interactions
// when the principal accidentally gets inherited somewhere. But
// SubjectPrincipal doesn't return strong references, so there's no way to
// sanely manage the lifetime of multiple null principals.
//
// So we use a singleton null principal. To avoid it being accidentally
// inherited and becoming a "real" subject or object principal, we do a
// release-mode assert during realm creation against using this principal on
// an actual global.
if (!realm) {
return sNullSubjectPrincipal;
}
return SubjectPrincipal(cx);
}
// static
nsIPrincipal* nsContentUtils::ObjectPrincipal(JSObject* aObj) {
MOZ_ASSERT(NS_IsMainThread());
#ifdef DEBUG
JS::AssertObjectBelongsToCurrentThread(aObj);
#endif
MOZ_DIAGNOSTIC_ASSERT(!js::IsCrossCompartmentWrapper(aObj));
JS::Realm* realm = js::GetNonCCWObjectRealm(aObj);
JSPrincipals* principals = JS::GetRealmPrincipals(realm);
return nsJSPrincipals::get(principals);
}
// static
nsresult nsContentUtils::NewURIWithDocumentCharset(nsIURI** aResult,
const nsAString& aSpec,
Document* aDocument,
nsIURI* aBaseURI) {
if (aDocument) {
return NS_NewURI(aResult, aSpec, aDocument->GetDocumentCharacterSet(),
aBaseURI);
}
return NS_NewURI(aResult, aSpec, nullptr, aBaseURI);
}
// static
bool nsContentUtils::IsNameWithDash(nsAtom* aName) {
// A valid custom element name is a sequence of characters name which
// must match the PotentialCustomElementName production:
// PotentialCustomElementName ::= [a-z] (PCENChar)* '-' (PCENChar)*
const char16_t* name = aName->GetUTF16String();
uint32_t len = aName->GetLength();
bool hasDash = false;
if (!len || name[0] < 'a' || name[0] > 'z') {
return false;
}
uint32_t i = 1;
while (i < len) {
if (NS_IS_HIGH_SURROGATE(name[i]) && i + 1 < len &&
NS_IS_LOW_SURROGATE(name[i + 1])) {
// Merged two 16-bit surrogate pairs into code point.
char32_t code = SURROGATE_TO_UCS4(name[i], name[i + 1]);
if (code < 0x10000 || code > 0xEFFFF) {
return false;
}
i += 2;
} else {
if (name[i] == '-') {
hasDash = true;
}
if (name[i] != '-' && name[i] != '.' && name[i] != '_' &&
name[i] != 0xB7 && (name[i] < '0' || name[i] > '9') &&
(name[i] < 'a' || name[i] > 'z') &&
(name[i] < 0xC0 || name[i] > 0xD6) &&
(name[i] < 0xF8 || name[i] > 0x37D) &&
(name[i] < 0x37F || name[i] > 0x1FFF) &&
(name[i] < 0x200C || name[i] > 0x200D) &&
(name[i] < 0x203F || name[i] > 0x2040) &&
(name[i] < 0x2070 || name[i] > 0x218F) &&
(name[i] < 0x2C00 || name[i] > 0x2FEF) &&
(name[i] < 0x3001 || name[i] > 0xD7FF) &&
(name[i] < 0xF900 || name[i] > 0xFDCF) &&
(name[i] < 0xFDF0 || name[i] > 0xFFFD)) {
return false;
}
i++;
}
}
return hasDash;
}
// static
bool nsContentUtils::IsCustomElementName(nsAtom* aName, uint32_t aNameSpaceID) {
// Allow non-dashed names in XUL for XBL to Custom Element migrations.
if (aNameSpaceID == kNameSpaceID_XUL) {
return true;
}
bool hasDash = IsNameWithDash(aName);
if (!hasDash) {
return false;
}
// The custom element name must not be one of the following values:
// annotation-xml
// color-profile
// font-face
// font-face-src
// font-face-uri
// font-face-format
// font-face-name
// missing-glyph
return aName != nsGkAtoms::annotation_xml_ &&
aName != nsGkAtoms::colorProfile && aName != nsGkAtoms::font_face &&
aName != nsGkAtoms::font_face_src &&
aName != nsGkAtoms::font_face_uri &&
aName != nsGkAtoms::font_face_format &&
aName != nsGkAtoms::font_face_name && aName != nsGkAtoms::missingGlyph;
}
// static
nsresult nsContentUtils::CheckQName(const nsAString& aQualifiedName,
bool aNamespaceAware,
const char16_t** aColon) {
const char* colon = nullptr;
const char16_t* begin = aQualifiedName.BeginReading();
const char16_t* end = aQualifiedName.EndReading();
int result = MOZ_XMLCheckQName(reinterpret_cast<const char*>(begin),
reinterpret_cast<const char*>(end),
aNamespaceAware, &colon);
if (!result) {
if (aColon) {
*aColon = reinterpret_cast<const char16_t*>(colon);
}
return NS_OK;
}
return NS_ERROR_DOM_INVALID_CHARACTER_ERR;
}
// static
nsresult nsContentUtils::SplitQName(const nsIContent* aNamespaceResolver,
const nsString& aQName, int32_t* aNamespace,
nsAtom** aLocalName) {
const char16_t* colon;
nsresult rv = nsContentUtils::CheckQName(aQName, true, &colon);
NS_ENSURE_SUCCESS(rv, rv);
if (colon) {
const char16_t* end;
aQName.EndReading(end);
nsAutoString nameSpace;
rv = aNamespaceResolver->LookupNamespaceURIInternal(
Substring(aQName.get(), colon), nameSpace);
NS_ENSURE_SUCCESS(rv, rv);
*aNamespace = NameSpaceManager()->GetNameSpaceID(
nameSpace, nsContentUtils::IsChromeDoc(aNamespaceResolver->OwnerDoc()));
if (*aNamespace == kNameSpaceID_Unknown) return NS_ERROR_FAILURE;
*aLocalName = NS_AtomizeMainThread(Substring(colon + 1, end)).take();
} else {
*aNamespace = kNameSpaceID_None;
*aLocalName = NS_AtomizeMainThread(aQName).take();
}
NS_ENSURE_TRUE(aLocalName, NS_ERROR_OUT_OF_MEMORY);
return NS_OK;
}
// static
nsresult nsContentUtils::GetNodeInfoFromQName(
const nsAString& aNamespaceURI, const nsAString& aQualifiedName,
nsNodeInfoManager* aNodeInfoManager, uint16_t aNodeType,
mozilla::dom::NodeInfo** aNodeInfo) {
const nsString& qName = PromiseFlatString(aQualifiedName);
const char16_t* colon;
nsresult rv = nsContentUtils::CheckQName(qName, true, &colon);
NS_ENSURE_SUCCESS(rv, rv);
int32_t nsID;
sNameSpaceManager->RegisterNameSpace(aNamespaceURI, nsID);
if (colon) {
const char16_t* end;
qName.EndReading(end);
RefPtr<nsAtom> prefix = NS_AtomizeMainThread(Substring(qName.get(), colon));
rv = aNodeInfoManager->GetNodeInfo(Substring(colon + 1, end), prefix, nsID,
aNodeType, aNodeInfo);
} else {
rv = aNodeInfoManager->GetNodeInfo(aQualifiedName, nullptr, nsID, aNodeType,
aNodeInfo);
}
NS_ENSURE_SUCCESS(rv, rv);
return nsContentUtils::IsValidNodeName((*aNodeInfo)->NameAtom(),
(*aNodeInfo)->GetPrefixAtom(),
(*aNodeInfo)->NamespaceID())
? NS_OK
: NS_ERROR_DOM_NAMESPACE_ERR;
}
// static
void nsContentUtils::SplitExpatName(const char16_t* aExpatName,
nsAtom** aPrefix, nsAtom** aLocalName,
int32_t* aNameSpaceID) {
/**
* Expat can send the following:
* localName
* namespaceURI<separator>localName
* namespaceURI<separator>localName<separator>prefix
*
* and we use 0xFFFF for the <separator>.
*
*/
const char16_t* uriEnd = nullptr;
const char16_t* nameEnd = nullptr;
const char16_t* pos;
for (pos = aExpatName; *pos; ++pos) {
if (*pos == 0xFFFF) {
if (uriEnd) {
nameEnd = pos;
} else {
uriEnd = pos;
}
}
}
const char16_t* nameStart;
if (uriEnd) {
if (sNameSpaceManager) {
sNameSpaceManager->RegisterNameSpace(
nsDependentSubstring(aExpatName, uriEnd), *aNameSpaceID);
} else {
*aNameSpaceID = kNameSpaceID_Unknown;
}
nameStart = (uriEnd + 1);
if (nameEnd) {
const char16_t* prefixStart = nameEnd + 1;
*aPrefix = NS_AtomizeMainThread(Substring(prefixStart, pos)).take();
} else {
nameEnd = pos;
*aPrefix = nullptr;
}
} else {
*aNameSpaceID = kNameSpaceID_None;
nameStart = aExpatName;
nameEnd = pos;
*aPrefix = nullptr;
}
*aLocalName = NS_AtomizeMainThread(Substring(nameStart, nameEnd)).take();
}
// static
PresShell* nsContentUtils::GetPresShellForContent(const nsIContent* aContent) {
Document* doc = aContent->GetComposedDoc();
if (!doc) {
return nullptr;
}
return doc->GetPresShell();
}
// static
nsPresContext* nsContentUtils::GetContextForContent(
const nsIContent* aContent) {
PresShell* presShell = GetPresShellForContent(aContent);
if (!presShell) {
return nullptr;
}
return presShell->GetPresContext();
}
// static
bool nsContentUtils::CanLoadImage(nsIURI* aURI, nsINode* aNode,
Document* aLoadingDocument,
nsIPrincipal* aLoadingPrincipal) {
MOZ_ASSERT(aURI, "Must have a URI");
MOZ_ASSERT(aLoadingDocument, "Must have a document");
MOZ_ASSERT(aLoadingPrincipal, "Must have a loading principal");
nsresult rv;
auto appType = nsIDocShell::APP_TYPE_UNKNOWN;
{
nsCOMPtr<nsIDocShellTreeItem> docShellTreeItem =
aLoadingDocument->GetDocShell();
if (docShellTreeItem) {
nsCOMPtr<nsIDocShellTreeItem> root;
docShellTreeItem->GetInProcessRootTreeItem(getter_AddRefs(root));
nsCOMPtr<nsIDocShell> docShell(do_QueryInterface(root));
if (docShell) {
appType = docShell->GetAppType();
}
}
}
if (appType != nsIDocShell::APP_TYPE_EDITOR) {
// Editor apps get special treatment here, editors can load images
// from anywhere. This allows editor to insert images from file://
// into documents that are being edited.
rv = sSecurityManager->CheckLoadURIWithPrincipal(
aLoadingPrincipal, aURI, nsIScriptSecurityManager::ALLOW_CHROME);
if (NS_FAILED(rv)) {
return false;
}
}
nsCOMPtr<nsILoadInfo> secCheckLoadInfo = new mozilla::net::LoadInfo(
aLoadingPrincipal,
aLoadingPrincipal, // triggering principal
aNode, nsILoadInfo::SEC_ONLY_FOR_EXPLICIT_CONTENTSEC_CHECK,
nsIContentPolicy::TYPE_INTERNAL_IMAGE);
int16_t decision = nsIContentPolicy::ACCEPT;
rv = NS_CheckContentLoadPolicy(aURI, secCheckLoadInfo,
EmptyCString(), // mime guess
&decision, GetContentPolicy());
return NS_FAILED(rv) ? false : NS_CP_ACCEPTED(decision);
}
// static
mozilla::OriginAttributes nsContentUtils::GetOriginAttributes(
Document* aDocument) {
if (!aDocument) {
return mozilla::OriginAttributes();
}
nsCOMPtr<nsILoadGroup> loadGroup = aDocument->GetDocumentLoadGroup();
if (loadGroup) {
return GetOriginAttributes(loadGroup);
}
mozilla::OriginAttributes attrs;
nsCOMPtr<nsIChannel> channel = aDocument->GetChannel();
if (channel) {
NS_GetOriginAttributes(channel, attrs);
}
return attrs;
}
// static
mozilla::OriginAttributes nsContentUtils::GetOriginAttributes(
nsILoadGroup* aLoadGroup) {
if (!aLoadGroup) {
return mozilla::OriginAttributes();
}
mozilla::OriginAttributes attrs;
nsCOMPtr<nsIInterfaceRequestor> callbacks;
aLoadGroup->GetNotificationCallbacks(getter_AddRefs(callbacks));
if (callbacks) {
nsCOMPtr<nsILoadContext> loadContext = do_GetInterface(callbacks);
if (loadContext) {
loadContext->GetOriginAttributes(attrs);
}
}
return attrs;
}
// static
bool nsContentUtils::IsInPrivateBrowsing(Document* aDoc) {
if (!aDoc) {
return false;
}
nsCOMPtr<nsILoadGroup> loadGroup = aDoc->GetDocumentLoadGroup();
if (loadGroup) {
nsCOMPtr<nsIInterfaceRequestor> callbacks;
loadGroup->GetNotificationCallbacks(getter_AddRefs(callbacks));
if (callbacks) {
nsCOMPtr<nsILoadContext> loadContext = do_GetInterface(callbacks);
if (loadContext) {
return loadContext->UsePrivateBrowsing();
}
}
}
nsCOMPtr<nsIChannel> channel = aDoc->GetChannel();
return channel && NS_UsePrivateBrowsing(channel);
}
// static
bool nsContentUtils::IsInPrivateBrowsing(nsILoadGroup* aLoadGroup) {
if (!aLoadGroup) {
return false;
}
bool isPrivate = false;
nsCOMPtr<nsIInterfaceRequestor> callbacks;
aLoadGroup->GetNotificationCallbacks(getter_AddRefs(callbacks));
if (callbacks) {
nsCOMPtr<nsILoadContext> loadContext = do_GetInterface(callbacks);
isPrivate = loadContext && loadContext->UsePrivateBrowsing();
}
return isPrivate;
}
bool nsContentUtils::DocumentInactiveForImageLoads(Document* aDocument) {
if (aDocument && !IsChromeDoc(aDocument) && !aDocument->IsResourceDoc()) {
nsCOMPtr<nsPIDOMWindowInner> win =
do_QueryInterface(aDocument->GetScopeObject());
return !win || !win->GetDocShell();
}
return false;
}
imgLoader* nsContentUtils::GetImgLoaderForDocument(Document* aDoc) {
NS_ENSURE_TRUE(!DocumentInactiveForImageLoads(aDoc), nullptr);
if (!aDoc) {
return imgLoader::NormalLoader();
}
bool isPrivate = IsInPrivateBrowsing(aDoc);
return isPrivate ? imgLoader::PrivateBrowsingLoader()
: imgLoader::NormalLoader();
}
// static
imgLoader* nsContentUtils::GetImgLoaderForChannel(nsIChannel* aChannel,
Document* aContext) {
NS_ENSURE_TRUE(!DocumentInactiveForImageLoads(aContext), nullptr);
if (!aChannel) {
return imgLoader::NormalLoader();
}
nsCOMPtr<nsILoadContext> context;
NS_QueryNotificationCallbacks(aChannel, context);
return context && context->UsePrivateBrowsing()
? imgLoader::PrivateBrowsingLoader()
: imgLoader::NormalLoader();
}
// static
bool nsContentUtils::IsImageInCache(nsIURI* aURI, Document* aDocument) {
imgILoader* loader = GetImgLoaderForDocument(aDocument);
nsCOMPtr<imgICache> cache = do_QueryInterface(loader);
// If something unexpected happened we return false, otherwise if props
// is set, the image is cached and we return true
nsCOMPtr<nsIProperties> props;
nsresult rv =
cache->FindEntryProperties(aURI, aDocument, getter_AddRefs(props));
return (NS_SUCCEEDED(rv) && props);
}
// static
int32_t nsContentUtils::CORSModeToLoadImageFlags(mozilla::CORSMode aMode) {
switch (aMode) {
case CORS_ANONYMOUS:
return imgILoader::LOAD_CORS_ANONYMOUS;
case CORS_USE_CREDENTIALS:
return imgILoader::LOAD_CORS_USE_CREDENTIALS;
default:
return 0;
}
}
// static
nsresult nsContentUtils::LoadImage(
nsIURI* aURI, nsINode* aContext, Document* aLoadingDocument,
nsIPrincipal* aLoadingPrincipal, uint64_t aRequestContextID,
nsIReferrerInfo* aReferrerInfo, imgINotificationObserver* aObserver,
int32_t aLoadFlags, const nsAString& initiatorType,
imgRequestProxy** aRequest, uint32_t aContentPolicyType,
bool aUseUrgentStartForChannel) {
MOZ_ASSERT(aURI, "Must have a URI");
MOZ_ASSERT(aContext, "Must have a context");
MOZ_ASSERT(aLoadingDocument, "Must have a document");
MOZ_ASSERT(aLoadingPrincipal, "Must have a principal");
MOZ_ASSERT(aRequest, "Null out param");
imgLoader* imgLoader = GetImgLoaderForDocument(aLoadingDocument);
if (!imgLoader) {
// nothing we can do here
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsILoadGroup> loadGroup = aLoadingDocument->GetDocumentLoadGroup();
nsIURI* documentURI = aLoadingDocument->GetDocumentURI();
NS_ASSERTION(loadGroup || IsFontTableURI(documentURI),
"Could not get loadgroup; onload may fire too early");
// XXXbz using "documentURI" for the initialDocumentURI is not quite
// right, but the best we can do here...
return imgLoader->LoadImage(aURI, /* uri to load */
documentURI, /* initialDocumentURI */
aReferrerInfo, /* referrerInfo */
aLoadingPrincipal, /* loading principal */
aRequestContextID, /* request context ID */
loadGroup, /* loadgroup */
aObserver, /* imgINotificationObserver */
aContext, /* loading context */
aLoadingDocument, /* uniquification key */
aLoadFlags, /* load flags */
nullptr, /* cache key */
aContentPolicyType, /* content policy type */
initiatorType, /* the load initiator */
aUseUrgentStartForChannel, /* urgent-start flag */
aRequest);
}
// static
already_AddRefed<imgIContainer> nsContentUtils::GetImageFromContent(
nsIImageLoadingContent* aContent, imgIRequest** aRequest) {
if (aRequest) {
*aRequest = nullptr;
}
NS_ENSURE_TRUE(aContent, nullptr);
nsCOMPtr<imgIRequest> imgRequest;
aContent->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
getter_AddRefs(imgRequest));
if (!imgRequest) {
return nullptr;
}
nsCOMPtr<imgIContainer> imgContainer;
imgRequest->GetImage(getter_AddRefs(imgContainer));
if (!imgContainer) {
return nullptr;
}
if (aRequest) {
imgRequest.swap(*aRequest);
}
return imgContainer.forget();
}
// static
already_AddRefed<imgRequestProxy> nsContentUtils::GetStaticRequest(
Document* aLoadingDocument, imgRequestProxy* aRequest) {
NS_ENSURE_TRUE(aRequest, nullptr);
RefPtr<imgRequestProxy> retval;
aRequest->GetStaticRequest(aLoadingDocument, getter_AddRefs(retval));
return retval.forget();
}
// static
bool nsContentUtils::ContentIsDraggable(nsIContent* aContent) {
MOZ_ASSERT(aContent);
if (auto htmlElement = nsGenericHTMLElement::FromNode(aContent)) {
if (htmlElement->Draggable()) {
return true;
}
if (htmlElement->AttrValueIs(kNameSpaceID_None, nsGkAtoms::draggable,
nsGkAtoms::_false, eIgnoreCase)) {
return false;
}
}
// special handling for content area image and link dragging
return IsDraggableImage(aContent) || IsDraggableLink(aContent);
}
// static
bool nsContentUtils::IsDraggableImage(nsIContent* aContent) {
MOZ_ASSERT(aContent, "Must have content node to test");
nsCOMPtr<nsIImageLoadingContent> imageContent(do_QueryInterface(aContent));
if (!imageContent) {
return false;
}
nsCOMPtr<imgIRequest> imgRequest;
imageContent->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
getter_AddRefs(imgRequest));
// XXXbz It may be draggable even if the request resulted in an error. Why?
// Not sure; that's what the old nsContentAreaDragDrop/nsFrame code did.
return imgRequest != nullptr;
}
// static
bool nsContentUtils::IsDraggableLink(const nsIContent* aContent) {
nsCOMPtr<nsIURI> absURI;
return aContent->IsLink(getter_AddRefs(absURI));
}
// static
nsresult nsContentUtils::QNameChanged(mozilla::dom::NodeInfo* aNodeInfo,
nsAtom* aName,
mozilla::dom::NodeInfo** aResult) {
nsNodeInfoManager* niMgr = aNodeInfo->NodeInfoManager();
*aResult = niMgr
->GetNodeInfo(aName, nullptr, aNodeInfo->NamespaceID(),
aNodeInfo->NodeType(), aNodeInfo->GetExtraName())
.take();
return NS_OK;
}
static bool TestSitePerm(nsIPrincipal* aPrincipal, const nsACString& aType,
uint32_t aPerm, bool aExactHostMatch) {
if (!aPrincipal) {
// We always deny (i.e. don't allow) the permission if we don't have a
// principal.
return aPerm != nsIPermissionManager::ALLOW_ACTION;
}
nsCOMPtr<nsIPermissionManager> permMgr = services::GetPermissionManager();
NS_ENSURE_TRUE(permMgr, false);
uint32_t perm;
nsresult rv;
if (aExactHostMatch) {
rv = permMgr->TestExactPermissionFromPrincipal(aPrincipal, aType, &perm);
} else {
rv = permMgr->TestPermissionFromPrincipal(aPrincipal, aType, &perm);
}
NS_ENSURE_SUCCESS(rv, false);
return perm == aPerm;
}
bool nsContentUtils::IsSitePermAllow(nsIPrincipal* aPrincipal,
const nsACString& aType) {
return TestSitePerm(aPrincipal, aType, nsIPermissionManager::ALLOW_ACTION,
false);
}
bool nsContentUtils::IsSitePermDeny(nsIPrincipal* aPrincipal,
const nsACString& aType) {
return TestSitePerm(aPrincipal, aType, nsIPermissionManager::DENY_ACTION,
false);
}
bool nsContentUtils::IsExactSitePermAllow(nsIPrincipal* aPrincipal,
const nsACString& aType) {
return TestSitePerm(aPrincipal, aType, nsIPermissionManager::ALLOW_ACTION,
true);
}
bool nsContentUtils::IsExactSitePermDeny(nsIPrincipal* aPrincipal,
const nsACString& aType) {
return TestSitePerm(aPrincipal, aType, nsIPermissionManager::DENY_ACTION,
true);
}
static const char* gEventNames[] = {"event"};
static const char* gSVGEventNames[] = {"evt"};
// for b/w compat, the first name to onerror is still 'event', even though it
// is actually the error message
static const char* gOnErrorNames[] = {"event", "source", "lineno", "colno",
"error"};
// static
void nsContentUtils::GetEventArgNames(int32_t aNameSpaceID, nsAtom* aEventName,
bool aIsForWindow, uint32_t* aArgCount,
const char*** aArgArray) {
#define SET_EVENT_ARG_NAMES(names) \
*aArgCount = sizeof(names) / sizeof(names[0]); \
*aArgArray = names;
// JSEventHandler is what does the arg magic for onerror, and it does
// not seem to take the namespace into account. So we let onerror in all
// namespaces get the 3 arg names.
if (aEventName == nsGkAtoms::onerror && aIsForWindow) {
SET_EVENT_ARG_NAMES(gOnErrorNames);
} else if (aNameSpaceID == kNameSpaceID_SVG) {
SET_EVENT_ARG_NAMES(gSVGEventNames);
} else {
SET_EVENT_ARG_NAMES(gEventNames);
}
}
// Note: The list of content bundles in nsStringBundle.cpp should be updated
// whenever entries are added or removed from this list.
static const char* gPropertiesFiles[nsContentUtils::PropertiesFile_COUNT] = {
// Must line up with the enum values in |PropertiesFile| enum.
"chrome://global/locale/css.properties",
"chrome://global/locale/xbl.properties",
"chrome://global/locale/xul.properties",
"chrome://global/locale/layout_errors.properties",
"chrome://global/locale/layout/HtmlForm.properties",
"chrome://global/locale/printing.properties",
"chrome://global/locale/dom/dom.properties",
"chrome://global/locale/layout/htmlparser.properties",
"chrome://global/locale/svg/svg.properties",
"chrome://branding/locale/brand.properties",
"chrome://global/locale/commonDialogs.properties",
"chrome://global/locale/mathml/mathml.properties",
"chrome://global/locale/security/security.properties",
"chrome://necko/locale/necko.properties",
"chrome://global/locale/layout/HtmlForm.properties",
"resource://gre/res/locale/layout/HtmlForm.properties"};
/* static */
nsresult nsContentUtils::EnsureStringBundle(PropertiesFile aFile) {
if (!sStringBundles[aFile]) {
if (!sStringBundleService) {
nsresult rv =
CallGetService(NS_STRINGBUNDLE_CONTRACTID, &sStringBundleService);
NS_ENSURE_SUCCESS(rv, rv);
}
nsIStringBundle* bundle;
nsresult rv =
sStringBundleService->CreateBundle(gPropertiesFiles[aFile], &bundle);
NS_ENSURE_SUCCESS(rv, rv);
sStringBundles[aFile] = bundle; // transfer ownership
}
return NS_OK;
}
/* static */
void nsContentUtils::AsyncPrecreateStringBundles() {
// We only ever want to pre-create bundles in the parent process.
//
// All nsContentUtils bundles are shared between the parent and child
// precesses, and the shared memory regions that back them *must* be created
// in the parent, and then sent to all children.
//
// If we attempt to create a bundle in the child before its memory region is
// available, we need to create a temporary non-shared bundle, and later
// replace that with the shared memory copy. So attempting to pre-load in the
// child is wasteful and unnecessary.
MOZ_ASSERT(XRE_IsParentProcess());
for (uint32_t bundleIndex = 0; bundleIndex < PropertiesFile_COUNT;
++bundleIndex) {
nsresult rv = NS_DispatchToCurrentThreadQueue(
NS_NewRunnableFunction("AsyncPrecreateStringBundles",
[bundleIndex]() {
PropertiesFile file =
static_cast<PropertiesFile>(bundleIndex);
EnsureStringBundle(file);
nsIStringBundle* bundle = sStringBundles[file];
bundle->AsyncPreload();
}),
EventQueuePriority::Idle);
Unused << NS_WARN_IF(NS_FAILED(rv));
}
}
static bool SpoofLocaleEnglish() {
// 0 - will prompt
// 1 - don't spoof
// 2 - spoof
return StaticPrefs::privacy_spoof_english() == 2;
}
/* static */
nsresult nsContentUtils::GetLocalizedString(PropertiesFile aFile,
const char* aKey,
nsAString& aResult) {
// When we spoof English, use en-US default strings in HTML forms.
if (aFile == eFORMS_PROPERTIES_MAYBESPOOF && SpoofLocaleEnglish()) {
aFile = eFORMS_PROPERTIES_en_US;
}
nsresult rv = EnsureStringBundle(aFile);
NS_ENSURE_SUCCESS(rv, rv);
nsIStringBundle* bundle = sStringBundles[aFile];
return bundle->GetStringFromName(aKey, aResult);
}
/* static */
nsresult nsContentUtils::FormatLocalizedString(
PropertiesFile aFile, const char* aKey, const nsTArray<nsString>& aParams,
nsAString& aResult) {
// When we spoof English, use en-US default strings in HTML forms.
if (aFile == eFORMS_PROPERTIES_MAYBESPOOF && SpoofLocaleEnglish()) {
aFile = eFORMS_PROPERTIES_en_US;
}
nsresult rv = EnsureStringBundle(aFile);
NS_ENSURE_SUCCESS(rv, rv);
nsIStringBundle* bundle = sStringBundles[aFile];
if (aParams.IsEmpty()) {
return bundle->GetStringFromName(aKey, aResult);
}
return bundle->FormatStringFromName(aKey, aParams, aResult);
}
/* static */
void nsContentUtils::LogSimpleConsoleError(const nsAString& aErrorText,
const char* classification,
bool aFromPrivateWindow,
bool aFromChromeContext) {
nsCOMPtr<nsIScriptError> scriptError =
do_CreateInstance(NS_SCRIPTERROR_CONTRACTID);
if (scriptError) {
nsCOMPtr<nsIConsoleService> console =
do_GetService(NS_CONSOLESERVICE_CONTRACTID);
if (console && NS_SUCCEEDED(scriptError->Init(
aErrorText, EmptyString(), EmptyString(), 0, 0,
nsIScriptError::errorFlag, classification,
aFromPrivateWindow, aFromChromeContext))) {
console->LogMessage(scriptError);
}
}
}
/* static */
nsresult nsContentUtils::ReportToConsole(
uint32_t aErrorFlags, const nsACString& aCategory,
const Document* aDocument, PropertiesFile aFile, const char* aMessageName,
const nsTArray<nsString>& aParams, nsIURI* aURI,
const nsString& aSourceLine, uint32_t aLineNumber, uint32_t aColumnNumber) {
nsresult rv;
nsAutoString errorText;
if (!aParams.IsEmpty()) {
rv = FormatLocalizedString(aFile, aMessageName, aParams, errorText);
} else {
rv = GetLocalizedString(aFile, aMessageName, errorText);
}
NS_ENSURE_SUCCESS(rv, rv);
return ReportToConsoleNonLocalized(errorText, aErrorFlags, aCategory,
aDocument, aURI, aSourceLine, aLineNumber,
aColumnNumber);
}
/* static */
void nsContentUtils::ReportEmptyGetElementByIdArg(const Document* aDoc) {
ReportToConsole(nsIScriptError::warningFlag, NS_LITERAL_CSTRING("DOM"), aDoc,
nsContentUtils::eDOM_PROPERTIES, "EmptyGetElementByIdParam");
}
/* static */
nsresult nsContentUtils::ReportToConsoleNonLocalized(
const nsAString& aErrorText, uint32_t aErrorFlags,
const nsACString& aCategory, const Document* aDocument, nsIURI* aURI,
const nsString& aSourceLine, uint32_t aLineNumber, uint32_t aColumnNumber,
MissingErrorLocationMode aLocationMode) {
uint64_t innerWindowID = 0;
if (aDocument) {
if (!aURI) {
aURI = aDocument->GetDocumentURI();
}
innerWindowID = aDocument->InnerWindowID();
}
return ReportToConsoleByWindowID(aErrorText, aErrorFlags, aCategory,
innerWindowID, aURI, aSourceLine,
aLineNumber, aColumnNumber, aLocationMode);
}
/* static */
nsresult nsContentUtils::ReportToConsoleByWindowID(
const nsAString& aErrorText, uint32_t aErrorFlags,
const nsACString& aCategory, uint64_t aInnerWindowID, nsIURI* aURI,
const nsString& aSourceLine, uint32_t aLineNumber, uint32_t aColumnNumber,
MissingErrorLocationMode aLocationMode) {
nsresult rv;
if (!sConsoleService) { // only need to bother null-checking here
rv = CallGetService(NS_CONSOLESERVICE_CONTRACTID, &sConsoleService);
NS_ENSURE_SUCCESS(rv, rv);
}
nsAutoString spec;
if (!aLineNumber && aLocationMode == eUSE_CALLING_LOCATION) {
JSContext* cx = GetCurrentJSContext();
if (cx) {
nsJSUtils::GetCallingLocation(cx, spec, &aLineNumber, &aColumnNumber);
}
}
nsCOMPtr<nsIScriptError> errorObject =
do_CreateInstance(NS_SCRIPTERROR_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
if (!spec.IsEmpty()) {
rv = errorObject->InitWithWindowID(aErrorText,
spec, // file name
aSourceLine, aLineNumber, aColumnNumber,
aErrorFlags, aCategory, aInnerWindowID);
} else {
rv = errorObject->InitWithSourceURI(aErrorText, aURI, aSourceLine,
aLineNumber, aColumnNumber, aErrorFlags,
aCategory, aInnerWindowID);
}
NS_ENSURE_SUCCESS(rv, rv);
return sConsoleService->LogMessage(errorObject);
}
void nsContentUtils::LogMessageToConsole(const char* aMsg) {
if (!sConsoleService) { // only need to bother null-checking here
CallGetService(NS_CONSOLESERVICE_CONTRACTID, &sConsoleService);
if (!sConsoleService) {
return;
}
}
sConsoleService->LogStringMessage(NS_ConvertUTF8toUTF16(aMsg).get());
}
bool nsContentUtils::IsChildOfSameType(Document* aDoc) {
nsCOMPtr<nsIDocShellTreeItem> docShellAsItem(aDoc->GetDocShell());
nsCOMPtr<nsIDocShellTreeItem> sameTypeParent;
if (docShellAsItem) {
docShellAsItem->GetInProcessSameTypeParent(getter_AddRefs(sameTypeParent));
}
return sameTypeParent != nullptr;
}
bool nsContentUtils::IsPlainTextType(const nsACString& aContentType) {
// NOTE: if you add a type here, add it to the CONTENTDLF_CATEGORIES
// define in nsContentDLF.h as well.
return aContentType.EqualsLiteral(TEXT_PLAIN) ||
aContentType.EqualsLiteral(TEXT_CSS) ||
aContentType.EqualsLiteral(TEXT_CACHE_MANIFEST) ||
aContentType.EqualsLiteral(TEXT_VTT) ||
aContentType.EqualsLiteral(APPLICATION_JAVASCRIPT) ||
aContentType.EqualsLiteral(APPLICATION_XJAVASCRIPT) ||
aContentType.EqualsLiteral(TEXT_ECMASCRIPT) ||
aContentType.EqualsLiteral(APPLICATION_ECMASCRIPT) ||
aContentType.EqualsLiteral(TEXT_JAVASCRIPT) ||
aContentType.EqualsLiteral(APPLICATION_JSON) ||
aContentType.EqualsLiteral(TEXT_JSON);
}
bool nsContentUtils::IsUtf8OnlyPlainTextType(const nsACString& aContentType) {
// NOTE: This must be a subset of the list in IsPlainTextType().
return aContentType.EqualsLiteral(TEXT_CACHE_MANIFEST) ||
aContentType.EqualsLiteral(APPLICATION_JSON) ||
aContentType.EqualsLiteral(TEXT_JSON) ||
aContentType.EqualsLiteral(TEXT_VTT);
}
// static
nsIContentPolicy* nsContentUtils::GetContentPolicy() {
if (!sTriedToGetContentPolicy) {
CallGetService(NS_CONTENTPOLICY_CONTRACTID, &sContentPolicyService);
// It's OK to not have a content policy service
sTriedToGetContentPolicy = true;
}
return sContentPolicyService;
}
// static
bool nsContentUtils::IsEventAttributeName(nsAtom* aName, int32_t aType) {
const char16_t* name = aName->GetUTF16String();
if (name[0] != 'o' || name[1] != 'n' ||
(aName == nsGkAtoms::onformdata &&
!mozilla::StaticPrefs::dom_formdata_event_enabled())) {
return false;
}
EventNameMapping mapping;
return (sAtomEventTable->Get(aName, &mapping) && mapping.mType & aType);
}
// static
EventMessage nsContentUtils::GetEventMessage(nsAtom* aName) {
MOZ_ASSERT(NS_IsMainThread(), "sAtomEventTable is not threadsafe");
if (aName) {
EventNameMapping mapping;
if (sAtomEventTable->Get(aName, &mapping)) {
return mapping.mMessage;
}
}
return eUnidentifiedEvent;
}
// static
mozilla::EventClassID nsContentUtils::GetEventClassID(const nsAString& aName) {
EventNameMapping mapping;
if (sStringEventTable->Get(aName, &mapping)) return mapping.mEventClassID;
return eBasicEventClass;
}
nsAtom* nsContentUtils::GetEventMessageAndAtom(
const nsAString& aName, mozilla::EventClassID aEventClassID,
EventMessage* aEventMessage) {
MOZ_ASSERT(NS_IsMainThread(), "Our hashtables are not threadsafe");
EventNameMapping mapping;
if (sStringEventTable->Get(aName, &mapping)) {
*aEventMessage = mapping.mEventClassID == aEventClassID
? mapping.mMessage
: eUnidentifiedEvent;
return mapping.mAtom;
}
// If we have cached lots of user defined event names, clear some of them.
if (sUserDefinedEvents->Length() > 127) {
while (sUserDefinedEvents->Length() > 64) {
nsAtom* first = sUserDefinedEvents->ElementAt(0);
sStringEventTable->Remove(Substring(nsDependentAtomString(first), 2));
sUserDefinedEvents->RemoveElementAt(0);
}
}
*aEventMessage = eUnidentifiedEvent;
RefPtr<nsAtom> atom = NS_AtomizeMainThread(NS_LITERAL_STRING("on") + aName);
sUserDefinedEvents->AppendElement(atom);
mapping.mAtom = atom;
mapping.mMessage = eUnidentifiedEvent;
mapping.mType = EventNameType_None;
mapping.mEventClassID = eBasicEventClass;
// This is a slow hashtable call, but at least we cache the result for the
// following calls. Because GetEventMessageAndAtomForListener utilizes
// sStringEventTable, it needs to know in which cases sStringEventTable
// doesn't contain the information it needs so that it can use
// sAtomEventTable instead.
mapping.mMaybeSpecialSVGorSMILEvent =
GetEventMessage(atom) != eUnidentifiedEvent;
sStringEventTable->Put(aName, mapping);
return mapping.mAtom;
}
// static
EventMessage nsContentUtils::GetEventMessageAndAtomForListener(
const nsAString& aName, nsAtom** aOnName) {
MOZ_ASSERT(NS_IsMainThread(), "Our hashtables are not threadsafe");
// Because of SVG/SMIL sStringEventTable contains a subset of the event names
// comparing to the sAtomEventTable. However, usually sStringEventTable
// contains the information we need, so in order to reduce hashtable
// lookups, start from it.
EventNameMapping mapping;
EventMessage msg = eUnidentifiedEvent;
RefPtr<nsAtom> atom;
if (sStringEventTable->Get(aName, &mapping)) {
if (mapping.mMaybeSpecialSVGorSMILEvent) {
// Try the atom version so that we should get the right message for
// SVG/SMIL.
atom = NS_AtomizeMainThread(NS_LITERAL_STRING("on") + aName);
msg = GetEventMessage(atom);
} else {
atom = mapping.mAtom;
msg = mapping.mMessage;
}
atom.forget(aOnName);
return msg;
}
// GetEventMessageAndAtom will cache the event type for the future usage...
GetEventMessageAndAtom(aName, eBasicEventClass, &msg);
// ...and then call this method recursively to get the message and atom from
// now updated sStringEventTable.
return GetEventMessageAndAtomForListener(aName, aOnName);
}
static nsresult GetEventAndTarget(Document* aDoc, nsISupports* aTarget,
const nsAString& aEventName,
CanBubble aCanBubble, Cancelable aCancelable,
Composed aComposed, Trusted aTrusted,
Event** aEvent, EventTarget** aTargetOut) {
nsCOMPtr<EventTarget> target(do_QueryInterface(aTarget));
NS_ENSURE_TRUE(aDoc && target, NS_ERROR_INVALID_ARG);
ErrorResult err;
RefPtr<Event> event =
aDoc->CreateEvent(NS_LITERAL_STRING("Events"), CallerType::System, err);
if (NS_WARN_IF(err.Failed())) {
return err.StealNSResult();
}
event->InitEvent(aEventName, aCanBubble, aCancelable, aComposed);
event->SetTrusted(aTrusted == Trusted::eYes);
event->SetTarget(target);
event.forget(aEvent);
target.forget(aTargetOut);
return NS_OK;
}
// static
nsresult nsContentUtils::DispatchTrustedEvent(
Document* aDoc, nsISupports* aTarget, const nsAString& aEventName,
CanBubble aCanBubble, Cancelable aCancelable, Composed aComposed,
bool* aDefaultAction) {
MOZ_ASSERT(!aEventName.EqualsLiteral("input"),
"Use DispatchInputEvent() instead");
return DispatchEvent(aDoc, aTarget, aEventName, aCanBubble, aCancelable,
aComposed, Trusted::eYes, aDefaultAction);
}
// static
nsresult nsContentUtils::DispatchUntrustedEvent(
Document* aDoc, nsISupports* aTarget, const nsAString& aEventName,
CanBubble aCanBubble, Cancelable aCancelable, bool* aDefaultAction) {
return DispatchEvent(aDoc, aTarget, aEventName, aCanBubble, aCancelable,
Composed::eDefault, Trusted::eNo, aDefaultAction);
}
// static
nsresult nsContentUtils::DispatchEvent(Document* aDoc, nsISupports* aTarget,
const nsAString& aEventName,
CanBubble aCanBubble,
Cancelable aCancelable,
Composed aComposed, Trusted aTrusted,
bool* aDefaultAction,
ChromeOnlyDispatch aOnlyChromeDispatch) {
RefPtr<Event> event;
nsCOMPtr<EventTarget> target;
nsresult rv = GetEventAndTarget(
aDoc, aTarget, aEventName, aCanBubble, aCancelable, aComposed, aTrusted,
getter_AddRefs(event), getter_AddRefs(target));
NS_ENSURE_SUCCESS(rv, rv);
event->WidgetEventPtr()->mFlags.mOnlyChromeDispatch =
aOnlyChromeDispatch == ChromeOnlyDispatch::eYes;
ErrorResult err;
bool doDefault = target->DispatchEvent(*event, CallerType::System, err);
if (aDefaultAction) {
*aDefaultAction = doDefault;
}
return err.StealNSResult();
}
// static
nsresult nsContentUtils::DispatchEvent(Document* aDoc, nsISupports* aTarget,
WidgetEvent& aEvent,
EventMessage aEventMessage,
CanBubble aCanBubble,
Cancelable aCancelable, Trusted aTrusted,
bool* aDefaultAction,
ChromeOnlyDispatch aOnlyChromeDispatch) {
MOZ_ASSERT_IF(aOnlyChromeDispatch == ChromeOnlyDispatch::eYes,
aTrusted == Trusted::eYes);
nsCOMPtr<EventTarget> target(do_QueryInterface(aTarget));
aEvent.mTime = PR_Now();
aEvent.mSpecifiedEventType = GetEventTypeFromMessage(aEventMessage);
aEvent.SetDefaultComposed();
aEvent.SetDefaultComposedInNativeAnonymousContent();
aEvent.mFlags.mBubbles = aCanBubble == CanBubble::eYes;
aEvent.mFlags.mCancelable = aCancelable == Cancelable::eYes;
aEvent.mFlags.mOnlyChromeDispatch =
aOnlyChromeDispatch == ChromeOnlyDispatch::eYes;
aEvent.mTarget = target;
nsEventStatus status = nsEventStatus_eIgnore;
nsresult rv = EventDispatcher::DispatchDOMEvent(target, &aEvent, nullptr,
nullptr, &status);
if (aDefaultAction) {
*aDefaultAction = (status != nsEventStatus_eConsumeNoDefault);
}
return rv;
}
nsContentUtils::InputEventOptions::InputEventOptions(
DataTransfer* aDataTransfer)
: mDataTransfer(aDataTransfer) {
MOZ_ASSERT(mDataTransfer);
MOZ_ASSERT(mDataTransfer->IsReadOnly());
}
// static
nsresult nsContentUtils::DispatchInputEvent(Element* aEventTargetElement,
EditorInputType aEditorInputType,
TextEditor* aTextEditor,
const InputEventOptions& aOptions) {
if (NS_WARN_IF(!aEventTargetElement)) {
return NS_ERROR_INVALID_ARG;
}
// If this is called from editor, the instance should be set to aTextEditor.
// Otherwise, we need to look for an editor for aEventTargetElement.
// However, we don't need to do it for HTMLEditor since nobody shouldn't
// dispatch "input" event for HTMLEditor except HTMLEditor itself.
bool useInputEvent = false;
if (aTextEditor) {
useInputEvent = true;
} else if (HTMLTextAreaElement* textAreaElement =
HTMLTextAreaElement::FromNode(aEventTargetElement)) {
aTextEditor = textAreaElement->GetTextEditorWithoutCreation();
useInputEvent = true;
} else if (HTMLInputElement* inputElement =
HTMLInputElement::FromNode(aEventTargetElement)) {
if (inputElement->IsInputEventTarget()) {
aTextEditor = inputElement->GetTextEditorWithoutCreation();
useInputEvent = true;
}
}
#ifdef DEBUG
else {
nsCOMPtr<nsITextControlElement> textControlElement =
do_QueryInterface(aEventTargetElement);
MOZ_ASSERT(!textControlElement,
"The event target may have editor, but we've not known it yet.");
}
#endif // #ifdef DEBUG
// If the event target is an <input> element, we need to update
// validationMessage value before dispatching "input" event because
// "input" event listener may need to check it.
HTMLInputElement* inputElement =
HTMLInputElement::FromNode(aEventTargetElement);
if (inputElement) {
MOZ_KnownLive(inputElement)->MaybeUpdateAllValidityStates(true);
// XXX Should we stop dispatching "input" event if the target is removed
// from the DOM tree?
}
if (!useInputEvent) {
MOZ_ASSERT(aEditorInputType == EditorInputType::eUnknown);
// Dispatch "input" event with Event instance.
WidgetEvent widgetEvent(true, eUnidentifiedEvent);
widgetEvent.mSpecifiedEventType = nsGkAtoms::oninput;
widgetEvent.mFlags.mCancelable = false;
// Using same time as nsContentUtils::DispatchEvent() for backward
// compatibility.
widgetEvent.mTime = PR_Now();
(new AsyncEventDispatcher(aEventTargetElement, widgetEvent))
->RunDOMEventWhenSafe();
return NS_OK;
}
nsCOMPtr<nsIWidget> widget;
if (aTextEditor) {
widget = aTextEditor->GetWidget();
if (NS_WARN_IF(!widget)) {
return NS_ERROR_FAILURE;
}
} else {
Document* document = aEventTargetElement->OwnerDoc();
if (NS_WARN_IF(!document)) {
return NS_ERROR_FAILURE;
}
// If we're running xpcshell tests, we fail to get presShell here.
// Even in such case, we need to dispatch "input" event without widget.
PresShell* presShell = document->GetPresShell();
if (presShell) {
nsPresContext* presContext = presShell->GetPresContext();
if (NS_WARN_IF(!presContext)) {
return NS_ERROR_FAILURE;
}
widget = presContext->GetRootWidget();
if (NS_WARN_IF(!widget)) {
return NS_ERROR_FAILURE;
}
}
}
// Dispatch "input" event with InputEvent instance.
InternalEditorInputEvent inputEvent(true, eEditorInput, widget);
// Using same time as old event dispatcher in EditorBase for backward
// compatibility.
inputEvent.mTime = static_cast<uint64_t>(PR_Now() / 1000);
// If there is an editor, set isComposing to true when it has composition.
// Note that EditorBase::IsIMEComposing() may return false even when we
// need to set it to true.
// Otherwise, i.e., editor hasn't been created for the element yet,
// we should set isComposing to false since the element can never has
// composition without editor.
inputEvent.mIsComposing =
aTextEditor ? !!aTextEditor->GetComposition() : false;
if (!aTextEditor || !aTextEditor->AsHTMLEditor()) {
if (IsDataAvailableOnTextEditor(aEditorInputType)) {
inputEvent.mData = aOptions.mData;
MOZ_ASSERT(!inputEvent.mData.IsVoid(),
"inputEvent.mData shouldn't be void");
}
#ifdef DEBUG
else {
MOZ_ASSERT(inputEvent.mData.IsVoid(), "inputEvent.mData should be void");
}
#endif // #ifdef DEBUG
} else {
MOZ_ASSERT(aTextEditor->AsHTMLEditor());
if (IsDataAvailableOnHTMLEditor(aEditorInputType)) {
inputEvent.mData = aOptions.mData;
MOZ_ASSERT(!inputEvent.mData.IsVoid(),
"inputEvent.mData shouldn't be void");
} else {
MOZ_ASSERT(inputEvent.mData.IsVoid(), "inputEvent.mData should be void");
if (IsDataTransferAvailableOnHTMLEditor(aEditorInputType)) {
inputEvent.mDataTransfer = aOptions.mDataTransfer;
MOZ_ASSERT(inputEvent.mDataTransfer,
"inputEvent.mDataTransfer shouldn't be nullptr");
MOZ_ASSERT(inputEvent.mDataTransfer->IsReadOnly(),
"inputEvent.mDataTransfer should be read only");
}
#ifdef DEBUG
else {
MOZ_ASSERT(!inputEvent.mDataTransfer,
"inputEvent.mDataTransfer should be nullptr");
}
#endif // #ifdef DEBUG
}
}
inputEvent.mInputType = aEditorInputType;
(new AsyncEventDispatcher(aEventTargetElement, inputEvent))
->RunDOMEventWhenSafe();
return NS_OK;
}
nsresult nsContentUtils::DispatchChromeEvent(
Document* aDoc, nsISupports* aTarget, const nsAString& aEventName,
CanBubble aCanBubble, Cancelable aCancelable, bool* aDefaultAction) {
RefPtr<Event> event;
nsCOMPtr<EventTarget> target;
nsresult rv = GetEventAndTarget(
aDoc, aTarget, aEventName, aCanBubble, aCancelable, Composed::eDefault,
Trusted::eYes, getter_AddRefs(event), getter_AddRefs(target));
NS_ENSURE_SUCCESS(rv, rv);
NS_ASSERTION(aDoc, "GetEventAndTarget lied?");
if (!aDoc->GetWindow()) return NS_ERROR_INVALID_ARG;
EventTarget* piTarget = aDoc->GetWindow()->GetParentTarget();
if (!piTarget) return NS_ERROR_INVALID_ARG;
ErrorResult err;
bool defaultActionEnabled =
piTarget->DispatchEvent(*event, CallerType::System, err);
if (aDefaultAction) {
*aDefaultAction = defaultActionEnabled;
}
return err.StealNSResult();
}
void nsContentUtils::RequestFrameFocus(Element& aFrameElement, bool aCanRaise) {
RefPtr<Element> target = &aFrameElement;
bool defaultAction = true;
if (aCanRaise) {
DispatchEventOnlyToChrome(
target->OwnerDoc(), target, NS_LITERAL_STRING("framefocusrequested"),
CanBubble::eYes, Cancelable::eYes, &defaultAction);
}
if (!defaultAction) {
return;
}
nsCOMPtr<nsIFocusManager> fm = nsFocusManager::GetFocusManager();
if (!fm) {
return;
}
uint32_t flags = nsIFocusManager::FLAG_NOSCROLL;
if (aCanRaise) {
flags |= nsIFocusManager::FLAG_RAISE;
}
fm->SetFocus(target, flags);
}
nsresult nsContentUtils::DispatchEventOnlyToChrome(
Document* aDoc, nsISupports* aTarget, const nsAString& aEventName,
CanBubble aCanBubble, Cancelable aCancelable, bool* aDefaultAction) {
return DispatchEvent(aDoc, aTarget, aEventName, aCanBubble, aCancelable,
Composed::eDefault, Trusted::eYes, aDefaultAction,
ChromeOnlyDispatch::eYes);
}
/* static */
Element* nsContentUtils::MatchElementId(nsIContent* aContent,
const nsAtom* aId) {
for (nsIContent* cur = aContent; cur; cur = cur->GetNextNode(aContent)) {
if (aId == cur->GetID()) {
return cur->AsElement();
}
}
return nullptr;
}
/* static */
Element* nsContentUtils::MatchElementId(nsIContent* aContent,
const nsAString& aId) {
MOZ_ASSERT(!aId.IsEmpty(), "Will match random elements");
// ID attrs are generally stored as atoms, so just atomize this up front
RefPtr<nsAtom> id(NS_Atomize(aId));
if (!id) {
// OOM, so just bail
return nullptr;
}
return MatchElementId(aContent, id);
}
/* static */
Document* nsContentUtils::GetSubdocumentWithOuterWindowId(
Document* aDocument, uint64_t aOuterWindowId) {
if (!aDocument || !aOuterWindowId) {
return nullptr;
}
RefPtr<nsGlobalWindowOuter> window =
nsGlobalWindowOuter::GetOuterWindowWithId(aOuterWindowId);
if (!window) {
return nullptr;
}
RefPtr<Document> foundDoc = window->GetDoc();
if (nsContentUtils::ContentIsCrossDocDescendantOf(foundDoc, aDocument)) {
// Note that ContentIsCrossDocDescendantOf will return true if
// foundDoc == aDocument.
return foundDoc;
}
return nullptr;
}
/* static */
void nsContentUtils::RegisterShutdownObserver(nsIObserver* aObserver) {
nsCOMPtr<nsIObserverService> observerService =
mozilla::services::GetObserverService();
if (observerService) {
observerService->AddObserver(aObserver, NS_XPCOM_SHUTDOWN_OBSERVER_ID,
false);
}
}
/* static */
void nsContentUtils::UnregisterShutdownObserver(nsIObserver* aObserver) {
nsCOMPtr<nsIObserverService> observerService =
mozilla::services::GetObserverService();
if (observerService) {
observerService->RemoveObserver(aObserver, NS_XPCOM_SHUTDOWN_OBSERVER_ID);
}
}
/* static */
bool nsContentUtils::HasNonEmptyAttr(const nsIContent* aContent,
int32_t aNameSpaceID, nsAtom* aName) {
static Element::AttrValuesArray strings[] = {nsGkAtoms::_empty, nullptr};
return aContent->IsElement() &&
aContent->AsElement()->FindAttrValueIn(aNameSpaceID, aName, strings,
eCaseMatters) ==
Element::ATTR_VALUE_NO_MATCH;
}
/* static */
bool nsContentUtils::HasMutationListeners(nsINode* aNode, uint32_t aType,
nsINode* aTargetForSubtreeModified) {
Document* doc = aNode->OwnerDoc();
// global object will be null for documents that don't have windows.
nsPIDOMWindowInner* window = doc->GetInnerWindow();
// This relies on EventListenerManager::AddEventListener, which sets
// all mutation bits when there is a listener for DOMSubtreeModified event.
if (window && !window->HasMutationListeners(aType)) {
return false;
}
if (aNode->ChromeOnlyAccess() || aNode->IsInShadowTree()) {
return false;
}
doc->MayDispatchMutationEvent(aTargetForSubtreeModified);
// If we have a window, we can check it for mutation listeners now.
if (aNode->IsInUncomposedDoc()) {
nsCOMPtr<EventTarget> piTarget(do_QueryInterface(window));
if (piTarget) {
EventListenerManager* manager = piTarget->GetExistingListenerManager();
if (manager && manager->HasMutationListeners()) {
return true;
}
}
}
// If we have a window, we know a mutation listener is registered, but it
// might not be in our chain. If we don't have a window, we might have a
// mutation listener. Check quickly to see.
while (aNode) {
EventListenerManager* manager = aNode->GetExistingListenerManager();
if (manager && manager->HasMutationListeners()) {
return true;
}
if (aNode->IsContent()) {
nsIContent* insertionPoint = aNode->AsContent()->GetXBLInsertionPoint();
if (insertionPoint) {
aNode = insertionPoint->GetParent();
MOZ_ASSERT(aNode);
continue;
}
}
aNode = aNode->GetParentNode();
}
return false;
}
/* static */
bool nsContentUtils::HasMutationListeners(Document* aDocument, uint32_t aType) {
nsPIDOMWindowInner* window =
aDocument ? aDocument->GetInnerWindow() : nullptr;
// This relies on EventListenerManager::AddEventListener, which sets
// all mutation bits when there is a listener for DOMSubtreeModified event.
return !window || window->HasMutationListeners(aType);
}
void nsContentUtils::MaybeFireNodeRemoved(nsINode* aChild, nsINode* aParent) {
MOZ_ASSERT(aChild, "Missing child");
MOZ_ASSERT(aChild->GetParentNode() == aParent, "Wrong parent");
MOZ_ASSERT(aChild->OwnerDoc() == aParent->OwnerDoc(), "Wrong owner-doc");
// Having an explicit check here since it's an easy mistake to fall into,
// and there might be existing code with problems. We'd rather be safe
// than fire DOMNodeRemoved in all corner cases. We also rely on it for
// nsAutoScriptBlockerSuppressNodeRemoved.
if (!IsSafeToRunScript()) {
// This checks that IsSafeToRunScript is true since we don't want to fire
// events when that is false. We can't rely on EventDispatcher to assert
// this in this situation since most of the time there are no mutation
// event listeners, in which case we won't even attempt to dispatch events.
// However this also allows for two exceptions. First off, we don't assert
// if the mutation happens to native anonymous content since we never fire
// mutation events on such content anyway.
// Second, we don't assert if sDOMNodeRemovedSuppressCount is true since
// that is a know case when we'd normally fire a mutation event, but can't
// make that safe and so we suppress it at this time. Ideally this should
// go away eventually.
if (!(aChild->IsContent() &&
aChild->AsContent()->IsInNativeAnonymousSubtree()) &&
!sDOMNodeRemovedSuppressCount) {
NS_ERROR("Want to fire DOMNodeRemoved event, but it's not safe");
WarnScriptWasIgnored(aChild->OwnerDoc());
}
return;
}
if (HasMutationListeners(aChild, NS_EVENT_BITS_MUTATION_NODEREMOVED,
aParent)) {
InternalMutationEvent mutation(true, eLegacyNodeRemoved);
mutation.mRelatedNode = aParent;
mozAutoSubtreeModified subtree(aParent->OwnerDoc(), aParent);
EventDispatcher::Dispatch(aChild, nullptr, &mutation);
}
}
void nsContentUtils::UnmarkGrayJSListenersInCCGenerationDocuments() {
if (!sEventListenerManagersHash) {
return;
}
for (auto i = sEventListenerManagersHash->Iter(); !i.Done(); i.Next()) {
auto entry = static_cast<EventListenerManagerMapEntry*>(i.Get());
nsINode* n = static_cast<nsINode*>(entry->mListenerManager->GetTarget());
if (n && n->IsInComposedDoc() &&
nsCCUncollectableMarker::InGeneration(
n->OwnerDoc()->GetMarkedCCGeneration())) {
entry->mListenerManager->MarkForCC();
}
}
}
/* static */
void nsContentUtils::TraverseListenerManager(
nsINode* aNode, nsCycleCollectionTraversalCallback& cb) {
if (!sEventListenerManagersHash) {
// We're already shut down, just return.
return;
}
auto entry = static_cast<EventListenerManagerMapEntry*>(
sEventListenerManagersHash->Search(aNode));
if (entry) {
CycleCollectionNoteChild(cb, entry->mListenerManager.get(),
"[via hash] mListenerManager");
}
}
EventListenerManager* nsContentUtils::GetListenerManagerForNode(
nsINode* aNode) {
if (!sEventListenerManagersHash) {
// We're already shut down, don't bother creating an event listener
// manager.
return nullptr;
}
auto entry = static_cast<EventListenerManagerMapEntry*>(
sEventListenerManagersHash->Add(aNode, fallible));
if (!entry) {
return nullptr;
}
if (!entry->mListenerManager) {
entry->mListenerManager = new EventListenerManager(aNode);
aNode->SetFlags(NODE_HAS_LISTENERMANAGER);
}
return entry->mListenerManager;
}
EventListenerManager* nsContentUtils::GetExistingListenerManagerForNode(
const nsINode* aNode) {
if (!aNode->HasFlag(NODE_HAS_LISTENERMANAGER)) {
return nullptr;
}
if (!sEventListenerManagersHash) {
// We're already shut down, don't bother creating an event listener
// manager.
return nullptr;
}
auto entry = static_cast<EventListenerManagerMapEntry*>(
sEventListenerManagersHash->Search(aNode));
if (entry) {
return entry->mListenerManager;
}
return nullptr;
}
/* static */
void nsContentUtils::RemoveListenerManager(nsINode* aNode) {
if (sEventListenerManagersHash) {
auto entry = static_cast<EventListenerManagerMapEntry*>(
sEventListenerManagersHash->Search(aNode));
if (entry) {
RefPtr<EventListenerManager> listenerManager;
listenerManager.swap(entry->mListenerManager);
// Remove the entry and *then* do operations that could cause further
// modification of sEventListenerManagersHash. See bug 334177.
sEventListenerManagersHash->RawRemove(entry);
if (listenerManager) {
listenerManager->Disconnect();
}
}
}
}
/* static */
bool nsContentUtils::IsValidNodeName(nsAtom* aLocalName, nsAtom* aPrefix,
int32_t aNamespaceID) {
if (aNamespaceID == kNameSpaceID_Unknown) {
return false;
}
if (!aPrefix) {
// If the prefix is null, then either the QName must be xmlns or the
// namespace must not be XMLNS.
return (aLocalName == nsGkAtoms::xmlns) ==
(aNamespaceID == kNameSpaceID_XMLNS);
}
// If the prefix is non-null then the namespace must not be null.
if (aNamespaceID == kNameSpaceID_None) {
return false;
}
// If the namespace is the XMLNS namespace then the prefix must be xmlns,
// but the localname must not be xmlns.
if (aNamespaceID == kNameSpaceID_XMLNS) {
return aPrefix == nsGkAtoms::xmlns && aLocalName != nsGkAtoms::xmlns;
}
// If the namespace is not the XMLNS namespace then the prefix must not be
// xmlns.
// If the namespace is the XML namespace then the prefix can be anything.
// If the namespace is not the XML namespace then the prefix must not be xml.
return aPrefix != nsGkAtoms::xmlns &&
(aNamespaceID == kNameSpaceID_XML || aPrefix != nsGkAtoms::xml);
}
already_AddRefed<DocumentFragment> nsContentUtils::CreateContextualFragment(
nsINode* aContextNode, const nsAString& aFragment,
bool aPreventScriptExecution, ErrorResult& aRv) {
if (!aContextNode) {
aRv.Throw(NS_ERROR_INVALID_ARG);
return nullptr;
}
// If we don't have a document here, we can't get the right security context
// for compiling event handlers... so just bail out.
RefPtr<Document> document = aContextNode->OwnerDoc();
bool isHTML = document->IsHTMLDocument();
if (isHTML) {
RefPtr<DocumentFragment> frag =
new DocumentFragment(document->NodeInfoManager());
nsCOMPtr<nsIContent> contextAsContent = do_QueryInterface(aContextNode);
if (contextAsContent && !contextAsContent->IsElement()) {
contextAsContent = contextAsContent->GetParent();
if (contextAsContent && !contextAsContent->IsElement()) {
// can this even happen?
contextAsContent = nullptr;
}
}
if (contextAsContent && !contextAsContent->IsHTMLElement(nsGkAtoms::html)) {
aRv = ParseFragmentHTML(
aFragment, frag, contextAsContent->NodeInfo()->NameAtom(),
contextAsContent->GetNameSpaceID(),
(document->GetCompatibilityMode() == eCompatibility_NavQuirks),
aPreventScriptExecution);
} else {
aRv = ParseFragmentHTML(
aFragment, frag, nsGkAtoms::body, kNameSpaceID_XHTML,
(document->GetCompatibilityMode() == eCompatibility_NavQuirks),
aPreventScriptExecution);
}
return frag.forget();
}
AutoTArray<nsString, 32> tagStack;
nsAutoString uriStr, nameStr;
nsCOMPtr<nsIContent> content = do_QueryInterface(aContextNode);
// just in case we have a text node
if (content && !content->IsElement()) content = content->GetParent();
while (content && content->IsElement()) {
nsString& tagName = *tagStack.AppendElement();
tagName = content->NodeInfo()->QualifiedName();
// see if we need to add xmlns declarations
uint32_t count = content->AsElement()->GetAttrCount();
bool setDefaultNamespace = false;
if (count > 0) {
uint32_t index;
for (index = 0; index < count; index++) {
const BorrowedAttrInfo info =
content->AsElement()->GetAttrInfoAt(index);
const nsAttrName* name = info.mName;
if (name->NamespaceEquals(kNameSpaceID_XMLNS)) {
info.mValue->ToString(uriStr);
// really want something like nsXMLContentSerializer::SerializeAttr
tagName.AppendLiteral(" xmlns"); // space important
if (name->GetPrefix()) {
tagName.Append(char16_t(':'));
name->LocalName()->ToString(nameStr);
tagName.Append(nameStr);
} else {
setDefaultNamespace = true;
}
tagName.AppendLiteral(R"(=")");
tagName.Append(uriStr);
tagName.Append('"');
}
}
}
if (!setDefaultNamespace) {
mozilla::dom::NodeInfo* info = content->NodeInfo();
if (!info->GetPrefixAtom() && info->NamespaceID() != kNameSpaceID_None) {
// We have no namespace prefix, but have a namespace ID. Push
// default namespace attr in, so that our kids will be in our
// namespace.
info->GetNamespaceURI(uriStr);
tagName.AppendLiteral(R"( xmlns=")");
tagName.Append(uriStr);
tagName.Append('"');
}
}
content = content->GetParent();
}
RefPtr<DocumentFragment> frag;
aRv = ParseFragmentXML(aFragment, document, tagStack, aPreventScriptExecution,
getter_AddRefs(frag));
return frag.forget();
}
/* static */
void nsContentUtils::DropFragmentParsers() {
NS_IF_RELEASE(sHTMLFragmentParser);
NS_IF_RELEASE(sXMLFragmentParser);
NS_IF_RELEASE(sXMLFragmentSink);
}
/* static */
void nsContentUtils::XPCOMShutdown() { nsContentUtils::DropFragmentParsers(); }
/* static */
nsresult nsContentUtils::ParseFragmentHTML(const nsAString& aSourceBuffer,
nsIContent* aTargetNode,
nsAtom* aContextLocalName,
int32_t aContextNamespace,
bool aQuirks,
bool aPreventScriptExecution) {
AutoTimelineMarker m(aTargetNode->OwnerDoc()->GetDocShell(), "Parse HTML");
if (nsContentUtils::sFragmentParsingActive) {
MOZ_ASSERT_UNREACHABLE("Re-entrant fragment parsing attempted.");
return NS_ERROR_DOM_INVALID_STATE_ERR;
}
mozilla::AutoRestore<bool> guard(nsContentUtils::sFragmentParsingActive);
nsContentUtils::sFragmentParsingActive = true;
if (!sHTMLFragmentParser) {
NS_ADDREF(sHTMLFragmentParser = new nsHtml5StringParser());
// Now sHTMLFragmentParser owns the object
}
nsIContent* target = aTargetNode;
// If this is a chrome-privileged document, create a fragment first, and
// sanitize it before insertion.
RefPtr<DocumentFragment> fragment;
if (IsSystemPrincipal(aTargetNode->NodePrincipal())) {
fragment = new DocumentFragment(aTargetNode->OwnerDoc()->NodeInfoManager());
target = fragment;
}
nsresult rv = sHTMLFragmentParser->ParseFragment(
aSourceBuffer, target, aContextLocalName, aContextNamespace, aQuirks,
aPreventScriptExecution);
NS_ENSURE_SUCCESS(rv, rv);
if (fragment) {
// Don't fire mutation events for nodes removed by the sanitizer.
nsAutoScriptBlockerSuppressNodeRemoved scriptBlocker;
nsTreeSanitizer sanitizer(nsIParserUtils::SanitizerAllowStyle |
nsIParserUtils::SanitizerAllowComments |
nsIParserUtils::SanitizerDropForms |
nsIParserUtils::SanitizerLogRemovals);
sanitizer.Sanitize(fragment);
ErrorResult error;
aTargetNode->AppendChild(*fragment, error);
rv = error.StealNSResult();
}
return rv;
}
/* static */
nsresult nsContentUtils::ParseDocumentHTML(
const nsAString& aSourceBuffer, Document* aTargetDocument,
bool aScriptingEnabledForNoscriptParsing) {
AutoTimelineMarker m(aTargetDocument->GetDocShell(), "Parse HTML");
if (nsContentUtils::sFragmentParsingActive) {
MOZ_ASSERT_UNREACHABLE("Re-entrant fragment parsing attempted.");
return NS_ERROR_DOM_INVALID_STATE_ERR;
}
mozilla::AutoRestore<bool> guard(nsContentUtils::sFragmentParsingActive);
nsContentUtils::sFragmentParsingActive = true;
if (!sHTMLFragmentParser) {
NS_ADDREF(sHTMLFragmentParser = new nsHtml5StringParser());
// Now sHTMLFragmentParser owns the object
}
nsresult rv = sHTMLFragmentParser->ParseDocument(
aSourceBuffer, aTargetDocument, aScriptingEnabledForNoscriptParsing);
return rv;
}
/* static */
nsresult nsContentUtils::ParseFragmentXML(const nsAString& aSourceBuffer,
Document* aDocument,
nsTArray<nsString>& aTagStack,
bool aPreventScriptExecution,
DocumentFragment** aReturn) {
AutoTimelineMarker m(aDocument->GetDocShell(), "Parse XML");
if (nsContentUtils::sFragmentParsingActive) {
MOZ_ASSERT_UNREACHABLE("Re-entrant fragment parsing attempted.");
return NS_ERROR_DOM_INVALID_STATE_ERR;
}
mozilla::AutoRestore<bool> guard(nsContentUtils::sFragmentParsingActive);
nsContentUtils::sFragmentParsingActive = true;
if (!sXMLFragmentParser) {
nsCOMPtr<nsIParser> parser = do_CreateInstance(kCParserCID);
parser.forget(&sXMLFragmentParser);
// sXMLFragmentParser now owns the parser
}
if (!sXMLFragmentSink) {
NS_NewXMLFragmentContentSink(&sXMLFragmentSink);
// sXMLFragmentSink now owns the sink
}
nsCOMPtr<nsIContentSink> contentsink = do_QueryInterface(sXMLFragmentSink);
MOZ_ASSERT(contentsink, "Sink doesn't QI to nsIContentSink!");
sXMLFragmentParser->SetContentSink(contentsink);
sXMLFragmentSink->SetTargetDocument(aDocument);
sXMLFragmentSink->SetPreventScriptExecution(aPreventScriptExecution);
nsresult rv = sXMLFragmentParser->ParseFragment(aSourceBuffer, aTagStack);
if (NS_FAILED(rv)) {
// Drop the fragment parser and sink that might be in an inconsistent state
NS_IF_RELEASE(sXMLFragmentParser);
NS_IF_RELEASE(sXMLFragmentSink);
return rv;
}
rv = sXMLFragmentSink->FinishFragmentParsing(aReturn);
sXMLFragmentParser->Reset();
NS_ENSURE_SUCCESS(rv, rv);
// If this is a chrome-privileged document, sanitize the fragment before
// returning.
if (IsSystemPrincipal(aDocument->NodePrincipal())) {
// Don't fire mutation events for nodes removed by the sanitizer.
nsAutoScriptBlockerSuppressNodeRemoved scriptBlocker;
nsTreeSanitizer sanitizer(nsIParserUtils::SanitizerAllowStyle |
nsIParserUtils::SanitizerAllowComments |
nsIParserUtils::SanitizerDropForms |
nsIParserUtils::SanitizerLogRemovals);
sanitizer.Sanitize(*aReturn);
}
return rv;
}
/* static */
nsresult nsContentUtils::ConvertToPlainText(const nsAString& aSourceBuffer,
nsAString& aResultBuffer,
uint32_t aFlags,
uint32_t aWrapCol) {
nsCOMPtr<nsIURI> uri;
NS_NewURI(getter_AddRefs(uri), "about:blank");
nsCOMPtr<nsIPrincipal> principal =
NullPrincipal::CreateWithoutOriginAttributes();
RefPtr<Document> document;
nsresult rv = NS_NewDOMDocument(getter_AddRefs(document), EmptyString(),
EmptyString(), nullptr, uri, uri, principal,
true, nullptr, DocumentFlavorHTML);
NS_ENSURE_SUCCESS(rv, rv);
rv = nsContentUtils::ParseDocumentHTML(
aSourceBuffer, document,
!(aFlags & nsIDocumentEncoder::OutputNoScriptContent));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIDocumentEncoder> encoder = do_createDocumentEncoder("text/plain");
rv = encoder->Init(document, NS_LITERAL_STRING("text/plain"), aFlags);
NS_ENSURE_SUCCESS(rv, rv);
encoder->SetWrapColumn(aWrapCol);
return encoder->EncodeToString(aResultBuffer);
}
/* static */
nsresult nsContentUtils::SetNodeTextContent(nsIContent* aContent,
const nsAString& aValue,
bool aTryReuse) {
// Fire DOMNodeRemoved mutation events before we do anything else.
nsCOMPtr<nsIContent> owningContent;
// Batch possible DOMSubtreeModified events.
mozAutoSubtreeModified subtree(nullptr, nullptr);
// Scope firing mutation events so that we don't carry any state that
// might be stale
{
// We're relying on mozAutoSubtreeModified to keep a strong reference if
// needed.
Document* doc = aContent->OwnerDoc();
// Optimize the common case of there being no observers
if (HasMutationListeners(doc, NS_EVENT_BITS_MUTATION_NODEREMOVED)) {
subtree.UpdateTarget(doc, nullptr);
owningContent = aContent;
nsCOMPtr<nsINode> child;
bool skipFirst = aTryReuse;
for (child = aContent->GetFirstChild();
child && child->GetParentNode() == aContent;
child = child->GetNextSibling()) {
if (skipFirst && child->IsText()) {
skipFirst = false;
continue;
}
nsContentUtils::MaybeFireNodeRemoved(child, aContent);
}
}
}
// Might as well stick a batch around this since we're performing several
// mutations.
mozAutoDocUpdate updateBatch(aContent->GetComposedDoc(), true);
nsAutoMutationBatch mb;
if (aTryReuse && !aValue.IsEmpty()) {
// Let's remove nodes until we find a eTEXT.
while (aContent->HasChildren()) {
nsIContent* child = aContent->GetFirstChild();
if (child->IsText()) {
break;
}
aContent->RemoveChildNode(child, true);
}
// If we have a node, it must be a eTEXT and we reuse it.
if (aContent->HasChildren()) {
nsIContent* child = aContent->GetFirstChild();
nsresult rv = child->AsText()->SetText(aValue, true);
NS_ENSURE_SUCCESS(rv, rv);
// All the following nodes, if they exist, must be deleted.
while (nsIContent* nextChild = child->GetNextSibling()) {
aContent->RemoveChildNode(nextChild, true);
}
}
if (aContent->HasChildren()) {
return NS_OK;
}
} else {
mb.Init(aContent, true, false);
while (aContent->HasChildren()) {
aContent->RemoveChildNode(aContent->GetFirstChild(), true);
}
}
mb.RemovalDone();
if (aValue.IsEmpty()) {
return NS_OK;
}
RefPtr<nsTextNode> textContent =
new nsTextNode(aContent->NodeInfo()->NodeInfoManager());
textContent->SetText(aValue, true);
nsresult rv = aContent->AppendChildTo(textContent, true);
mb.NodesAdded();
return rv;
}
static bool AppendNodeTextContentsRecurse(nsINode* aNode, nsAString& aResult,
const fallible_t& aFallible) {
for (nsIContent* child = aNode->GetFirstChild(); child;
child = child->GetNextSibling()) {
if (child->IsElement()) {
bool ok = AppendNodeTextContentsRecurse(child, aResult, aFallible);
if (!ok) {
return false;
}
} else if (Text* text = child->GetAsText()) {
bool ok = text->AppendTextTo(aResult, aFallible);
if (!ok) {
return false;
}
}
}
return true;
}
/* static */
bool nsContentUtils::AppendNodeTextContent(nsINode* aNode, bool aDeep,
nsAString& aResult,
const fallible_t& aFallible) {
if (Text* text = aNode->GetAsText()) {
return text->AppendTextTo(aResult, aFallible);
}
if (aDeep) {
return AppendNodeTextContentsRecurse(aNode, aResult, aFallible);
}
for (nsIContent* child = aNode->GetFirstChild(); child;
child = child->GetNextSibling()) {
if (Text* text = child->GetAsText()) {
bool ok = text->AppendTextTo(aResult, fallible);
if (!ok) {
return false;
}
}
}
return true;
}
bool nsContentUtils::HasNonEmptyTextContent(
nsINode* aNode, TextContentDiscoverMode aDiscoverMode) {
for (nsIContent* child = aNode->GetFirstChild(); child;
child = child->GetNextSibling()) {
if (child->IsText() && child->TextLength() > 0) {
return true;
}
if (aDiscoverMode == eRecurseIntoChildren &&
HasNonEmptyTextContent(child, aDiscoverMode)) {
return true;
}
}
return false;
}
/* static */
bool nsContentUtils::IsInSameAnonymousTree(const nsINode* aNode,
const nsIContent* aContent) {
MOZ_ASSERT(aNode, "Must have a node to work with");
MOZ_ASSERT(aContent, "Must have a content to work with");
if (!aNode->IsContent()) {
/**
* The root isn't an nsIContent, so it's a document or attribute. The only
* nodes in the same anonymous subtree as it will have a null
* bindingParent.
*
* XXXbz strictly speaking, that's not true for attribute nodes.
*/
return aContent->GetBindingParent() == nullptr;
}
return aNode->AsContent()->GetBindingParent() == aContent->GetBindingParent();
}
/* static */
bool nsContentUtils::IsInInteractiveHTMLContent(const Element* aElement,
const Element* aStop) {
const Element* element = aElement;
while (element && element != aStop) {
if (element->IsInteractiveHTMLContent(true)) {
return true;
}
element = element->GetFlattenedTreeParentElement();
}
return false;
}
/* static */
void nsContentUtils::NotifyInstalledMenuKeyboardListener(bool aInstalling) {
IMEStateManager::OnInstalledMenuKeyboardListener(aInstalling);
}
/* static */
bool nsContentUtils::SchemeIs(nsIURI* aURI, const char* aScheme) {
nsCOMPtr<nsIURI> baseURI = NS_GetInnermostURI(aURI);
NS_ENSURE_TRUE(baseURI, false);
return baseURI->SchemeIs(aScheme);
}
bool nsContentUtils::IsSystemPrincipal(nsIPrincipal* aPrincipal) {
// Some consumers call us with a null aPrincipal and expect a false return
// value...
return aPrincipal && aPrincipal->IsSystemPrincipal();
}
bool nsContentUtils::IsExpandedPrincipal(nsIPrincipal* aPrincipal) {
nsCOMPtr<nsIExpandedPrincipal> ep = do_QueryInterface(aPrincipal);
return !!ep;
}
nsIPrincipal* nsContentUtils::GetSystemPrincipal() {
MOZ_ASSERT(IsInitialized());
return sSystemPrincipal;
}
bool nsContentUtils::CombineResourcePrincipals(
nsCOMPtr<nsIPrincipal>* aResourcePrincipal, nsIPrincipal* aExtraPrincipal) {
if (!aExtraPrincipal) {
return false;
}
if (!*aResourcePrincipal) {
*aResourcePrincipal = aExtraPrincipal;
return true;
}
if (*aResourcePrincipal == aExtraPrincipal) {
return false;
}
bool subsumes;
if (NS_SUCCEEDED(
(*aResourcePrincipal)->Subsumes(aExtraPrincipal, &subsumes)) &&
subsumes) {
return false;
}
*aResourcePrincipal = sSystemPrincipal;
return true;
}
/* static */
void nsContentUtils::TriggerLink(nsIContent* aContent, nsIURI* aLinkURI,
const nsString& aTargetSpec, bool aClick,
bool aIsTrusted) {
MOZ_ASSERT(aLinkURI, "No link URI");
if (aContent->IsEditable() || !aContent->OwnerDoc()->LinkHandlingEnabled()) {
return;
}
nsCOMPtr<nsIDocShell> docShell = aContent->OwnerDoc()->GetDocShell();
if (!docShell) {
return;
}
if (!aClick) {
nsDocShell::Cast(docShell)->OnOverLink(aContent, aLinkURI, aTargetSpec);
return;
}
// Check that this page is allowed to load this URI.
nsresult proceed = NS_OK;
if (sSecurityManager) {
uint32_t flag = static_cast<uint32_t>(nsIScriptSecurityManager::STANDARD);
proceed = sSecurityManager->CheckLoadURIWithPrincipal(
aContent->NodePrincipal(), aLinkURI, flag);
}
// Only pass off the click event if the script security manager says it's ok.
// We need to rest aTargetSpec for forced downloads.
if (NS_SUCCEEDED(proceed)) {
// A link/area element with a download attribute is allowed to set
// a pseudo Content-Disposition header.
// For security reasons we only allow websites to declare same-origin
// resources as downloadable. If this check fails we will just do the normal
// thing (i.e. navigate to the resource).
nsAutoString fileName;
if ((!aContent->IsHTMLElement(nsGkAtoms::a) &&
!aContent->IsHTMLElement(nsGkAtoms::area) &&
!aContent->IsSVGElement(nsGkAtoms::a)) ||
!aContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::download,
fileName) ||
NS_FAILED(
aContent->NodePrincipal()->CheckMayLoad(aLinkURI, false, true))) {
fileName.SetIsVoid(true); // No actionable download attribute was found.
}
nsCOMPtr<nsIPrincipal> triggeringPrincipal = aContent->NodePrincipal();
nsCOMPtr<nsIContentSecurityPolicy> csp = aContent->GetCsp();
nsDocShell::Cast(docShell)->OnLinkClick(
aContent, aLinkURI, fileName.IsVoid() ? aTargetSpec : EmptyString(),
fileName, nullptr, nullptr, UserActivation::IsHandlingUserInput(),
aIsTrusted, triggeringPrincipal, csp);
}
}
/* static */
void nsContentUtils::GetLinkLocation(Element* aElement,
nsString& aLocationString) {
nsCOMPtr<nsIURI> hrefURI = aElement->GetHrefURI();
if (hrefURI) {
nsAutoCString specUTF8;
nsresult rv = hrefURI->GetSpec(specUTF8);
if (NS_SUCCEEDED(rv)) CopyUTF8toUTF16(specUTF8, aLocationString);
}
}
/* static */
nsIWidget* nsContentUtils::GetTopLevelWidget(nsIWidget* aWidget) {
if (!aWidget) return nullptr;
return aWidget->GetTopLevelWidget();
}
/* static */
const nsDependentString nsContentUtils::GetLocalizedEllipsis() {
static char16_t sBuf[4] = {0, 0, 0, 0};
if (!sBuf[0]) {
if (!SpoofLocaleEnglish()) {
nsAutoString tmp;
Preferences::GetLocalizedString("intl.ellipsis", tmp);
uint32_t len =
std::min(uint32_t(tmp.Length()), uint32_t(ArrayLength(sBuf) - 1));
CopyUnicodeTo(tmp, 0, sBuf, len);
}
if (!sBuf[0]) sBuf[0] = char16_t(0x2026);
}
return nsDependentString(sBuf);
}
/* static */
void nsContentUtils::AddScriptBlocker() {
MOZ_ASSERT(NS_IsMainThread());
if (!sScriptBlockerCount) {
MOZ_ASSERT(sRunnersCountAtFirstBlocker == 0,
"Should not already have a count");
sRunnersCountAtFirstBlocker =
sBlockedScriptRunners ? sBlockedScriptRunners->Length() : 0;
}
++sScriptBlockerCount;
}
#ifdef DEBUG
static bool sRemovingScriptBlockers = false;
#endif
/* static */
void nsContentUtils::RemoveScriptBlocker() {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(!sRemovingScriptBlockers);
NS_ASSERTION(sScriptBlockerCount != 0, "Negative script blockers");
--sScriptBlockerCount;
if (sScriptBlockerCount) {
return;
}
if (!sBlockedScriptRunners) {
return;
}
uint32_t firstBlocker = sRunnersCountAtFirstBlocker;
uint32_t lastBlocker = sBlockedScriptRunners->Length();
uint32_t originalFirstBlocker = firstBlocker;
uint32_t blockersCount = lastBlocker - firstBlocker;
sRunnersCountAtFirstBlocker = 0;
NS_ASSERTION(firstBlocker <= lastBlocker, "bad sRunnersCountAtFirstBlocker");
while (firstBlocker < lastBlocker) {
nsCOMPtr<nsIRunnable> runnable;
runnable.swap((*sBlockedScriptRunners)[firstBlocker]);
++firstBlocker;
// Calling the runnable can reenter us
runnable->Run();
// So can dropping the reference to the runnable
runnable = nullptr;
NS_ASSERTION(sRunnersCountAtFirstBlocker == 0, "Bad count");
NS_ASSERTION(!sScriptBlockerCount, "This is really bad");
}
#ifdef DEBUG
AutoRestore<bool> removingScriptBlockers(sRemovingScriptBlockers);
sRemovingScriptBlockers = true;
#endif
sBlockedScriptRunners->RemoveElementsAt(originalFirstBlocker, blockersCount);
}
/* static */
nsIWindowProvider* nsContentUtils::GetWindowProviderForContentProcess() {
MOZ_ASSERT(XRE_IsContentProcess());
return ContentChild::GetSingleton();
}
/* static */
already_AddRefed<nsPIDOMWindowOuter>
nsContentUtils::GetMostRecentNonPBWindow() {
nsCOMPtr<nsIWindowMediator> wm = do_GetService(NS_WINDOWMEDIATOR_CONTRACTID);
nsCOMPtr<mozIDOMWindowProxy> window;
wm->GetMostRecentNonPBWindow(u"navigator:browser", getter_AddRefs(window));
nsCOMPtr<nsPIDOMWindowOuter> pwindow;
pwindow = do_QueryInterface(window);
return pwindow.forget();
}
/* static */
void nsContentUtils::WarnScriptWasIgnored(Document* aDocument) {
nsAutoString msg;
bool privateBrowsing = false;
bool chromeContext = false;
if (aDocument) {
nsCOMPtr<nsIURI> uri = aDocument->GetDocumentURI();
if (uri) {
msg.Append(NS_ConvertUTF8toUTF16(uri->GetSpecOrDefault()));
msg.AppendLiteral(" : ");
}
privateBrowsing =
!!aDocument->NodePrincipal()->OriginAttributesRef().mPrivateBrowsingId;
chromeContext = IsSystemPrincipal(aDocument->NodePrincipal());
}
msg.AppendLiteral(
"Unable to run script because scripts are blocked internally.");
LogSimpleConsoleError(msg, "DOM", privateBrowsing, chromeContext);
}
/* static */
void nsContentUtils::AddScriptRunner(already_AddRefed<nsIRunnable> aRunnable) {
nsCOMPtr<nsIRunnable> runnable = aRunnable;
if (!runnable) {
return;
}
if (sScriptBlockerCount) {
sBlockedScriptRunners->AppendElement(runnable.forget());
return;
}
runnable->Run();
}
/* static */
void nsContentUtils::AddScriptRunner(nsIRunnable* aRunnable) {
nsCOMPtr<nsIRunnable> runnable = aRunnable;
AddScriptRunner(runnable.forget());
}
/* static */
void nsContentUtils::RunInStableState(already_AddRefed<nsIRunnable> aRunnable) {
MOZ_ASSERT(CycleCollectedJSContext::Get(), "Must be on a script thread!");
CycleCollectedJSContext::Get()->RunInStableState(std::move(aRunnable));
}
/* static */
void nsContentUtils::AddPendingIDBTransaction(
already_AddRefed<nsIRunnable> aTransaction) {
MOZ_ASSERT(CycleCollectedJSContext::Get(), "Must be on a script thread!");
CycleCollectedJSContext::Get()->AddPendingIDBTransaction(
std::move(aTransaction));
}
/* static */
bool nsContentUtils::IsInStableOrMetaStableState() {
MOZ_ASSERT(CycleCollectedJSContext::Get(), "Must be on a script thread!");
return CycleCollectedJSContext::Get()->IsInStableOrMetaStableState();
}
/* static */
void nsContentUtils::HidePopupsInDocument(Document* aDocument) {
#ifdef MOZ_XUL
nsXULPopupManager* pm = nsXULPopupManager::GetInstance();
if (pm && aDocument) {
nsCOMPtr<nsIDocShellTreeItem> docShellToHide = aDocument->GetDocShell();
if (docShellToHide) pm->HidePopupsInDocShell(docShellToHide);
}
#endif
}
/* static */
already_AddRefed<nsIDragSession> nsContentUtils::GetDragSession() {
nsCOMPtr<nsIDragSession> dragSession;
nsCOMPtr<nsIDragService> dragService =
do_GetService("@mozilla.org/widget/dragservice;1");
if (dragService) dragService->GetCurrentSession(getter_AddRefs(dragSession));
return dragSession.forget();
}
/* static */
nsresult nsContentUtils::SetDataTransferInEvent(WidgetDragEvent* aDragEvent) {
if (aDragEvent->mDataTransfer || !aDragEvent->IsTrusted()) {
return NS_OK;
}
// For dragstart events, the data transfer object is
// created before the event fires, so it should already be set. For other
// drag events, get the object from the drag session.
NS_ASSERTION(aDragEvent->mMessage != eDragStart,
"draggesture event created without a dataTransfer");
nsCOMPtr<nsIDragSession> dragSession = GetDragSession();
NS_ENSURE_TRUE(dragSession, NS_OK); // no drag in progress
RefPtr<DataTransfer> initialDataTransfer = dragSession->GetDataTransfer();
if (!initialDataTransfer) {
// A dataTransfer won't exist when a drag was started by some other
// means, for instance calling the drag service directly, or a drag
// from another application. In either case, a new dataTransfer should
// be created that reflects the data.
initialDataTransfer =
new DataTransfer(aDragEvent->mTarget, aDragEvent->mMessage, true, -1);
// now set it in the drag session so we don't need to create it again
dragSession->SetDataTransfer(initialDataTransfer);
}
bool isCrossDomainSubFrameDrop = false;
if (aDragEvent->mMessage == eDrop) {
isCrossDomainSubFrameDrop = CheckForSubFrameDrop(dragSession, aDragEvent);
}
// each event should use a clone of the original dataTransfer.
initialDataTransfer->Clone(
aDragEvent->mTarget, aDragEvent->mMessage, aDragEvent->mUserCancelled,
isCrossDomainSubFrameDrop, getter_AddRefs(aDragEvent->mDataTransfer));
if (NS_WARN_IF(!aDragEvent->mDataTransfer)) {
return NS_ERROR_OUT_OF_MEMORY;
}
// for the dragenter and dragover events, initialize the drop effect
// from the drop action, which platform specific widget code sets before
// the event is fired based on the keyboard state.
if (aDragEvent->mMessage == eDragEnter || aDragEvent->mMessage == eDragOver) {
uint32_t action;
dragSession->GetDragAction(&action);
uint32_t effectAllowed = aDragEvent->mDataTransfer->EffectAllowedInt();
aDragEvent->mDataTransfer->SetDropEffectInt(
FilterDropEffect(action, effectAllowed));
} else if (aDragEvent->mMessage == eDrop ||
aDragEvent->mMessage == eDragEnd) {
// For the drop and dragend events, set the drop effect based on the
// last value that the dropEffect had. This will have been set in
// EventStateManager::PostHandleEvent for the last dragenter or
// dragover event.
aDragEvent->mDataTransfer->SetDropEffectInt(
initialDataTransfer->DropEffectInt());
}
return NS_OK;
}
/* static */
uint32_t nsContentUtils::FilterDropEffect(uint32_t aAction,
uint32_t aEffectAllowed) {
// It is possible for the drag action to include more than one action, but
// the widget code which sets the action from the keyboard state should only
// be including one. If multiple actions were set, we just consider them in
// the following order:
// copy, link, move
if (aAction & nsIDragService::DRAGDROP_ACTION_COPY)
aAction = nsIDragService::DRAGDROP_ACTION_COPY;
else if (aAction & nsIDragService::DRAGDROP_ACTION_LINK)
aAction = nsIDragService::DRAGDROP_ACTION_LINK;
else if (aAction & nsIDragService::DRAGDROP_ACTION_MOVE)
aAction = nsIDragService::DRAGDROP_ACTION_MOVE;
// Filter the action based on the effectAllowed. If the effectAllowed
// doesn't include the action, then that action cannot be done, so adjust
// the action to something that is allowed. For a copy, adjust to move or
// link. For a move, adjust to copy or link. For a link, adjust to move or
// link. Otherwise, use none.
if (aAction & aEffectAllowed ||
aEffectAllowed == nsIDragService::DRAGDROP_ACTION_UNINITIALIZED)
return aAction;
if (aEffectAllowed & nsIDragService::DRAGDROP_ACTION_MOVE)
return nsIDragService::DRAGDROP_ACTION_MOVE;
if (aEffectAllowed & nsIDragService::DRAGDROP_ACTION_COPY)
return nsIDragService::DRAGDROP_ACTION_COPY;
if (aEffectAllowed & nsIDragService::DRAGDROP_ACTION_LINK)
return nsIDragService::DRAGDROP_ACTION_LINK;
return nsIDragService::DRAGDROP_ACTION_NONE;
}
/* static */
bool nsContentUtils::CheckForSubFrameDrop(nsIDragSession* aDragSession,
WidgetDragEvent* aDropEvent) {
nsCOMPtr<nsIContent> target = do_QueryInterface(aDropEvent->mOriginalTarget);
if (!target) {
return true;
}
Document* targetDoc = target->OwnerDoc();
nsPIDOMWindowOuter* targetWin = targetDoc->GetWindow();
if (!targetWin) {
return true;
}
nsCOMPtr<nsIDocShellTreeItem> tdsti = targetWin->GetDocShell();
if (!tdsti) {
return true;
}
// Always allow dropping onto chrome shells.
if (tdsti->ItemType() == nsIDocShellTreeItem::typeChrome) {
return false;
}
// If there is no source node, then this is a drag from another
// application, which should be allowed.
RefPtr<Document> doc;
aDragSession->GetSourceDocument(getter_AddRefs(doc));
if (doc) {
// Get each successive parent of the source document and compare it to
// the drop document. If they match, then this is a drag from a child frame.
do {
doc = doc->GetInProcessParentDocument();
if (doc == targetDoc) {
// The drag is from a child frame.
return true;
}
} while (doc);
}
return false;
}
/* static */
bool nsContentUtils::URIIsLocalFile(nsIURI* aURI) {
bool isFile;
nsCOMPtr<nsINetUtil> util = do_QueryInterface(sIOService);
// Important: we do NOT test the entire URI chain here!
return util &&
NS_SUCCEEDED(util->ProtocolHasFlags(
aURI, nsIProtocolHandler::URI_IS_LOCAL_FILE, &isFile)) &&
isFile;
}
/* static */
JSContext* nsContentUtils::GetCurrentJSContext() {
MOZ_ASSERT(IsInitialized());
if (!IsJSAPIActive()) {
return nullptr;
}
return danger::GetJSContext();
}
template <typename StringType, typename CharType>
void _ASCIIToLowerInSitu(StringType& aStr) {
CharType* iter = aStr.BeginWriting();
CharType* end = aStr.EndWriting();
MOZ_ASSERT(iter && end);
while (iter != end) {
CharType c = *iter;
if (c >= 'A' && c <= 'Z') {
*iter = c + ('a' - 'A');
}
++iter;
}
}
/* static */
void nsContentUtils::ASCIIToLower(nsAString& aStr) {
return _ASCIIToLowerInSitu<nsAString, char16_t>(aStr);
}
/* static */
void nsContentUtils::ASCIIToLower(nsACString& aStr) {
return _ASCIIToLowerInSitu<nsACString, char>(aStr);
}
template <typename StringType, typename CharType>
void _ASCIIToLowerCopy(const StringType& aSource, StringType& aDest) {
uint32_t len = aSource.Length();
aDest.SetLength(len);
MOZ_ASSERT(aDest.Length() == len);
CharType* dest = aDest.BeginWriting();
MOZ_ASSERT(dest);
const CharType* iter = aSource.BeginReading();
const CharType* end = aSource.EndReading();
while (iter != end) {
CharType c = *iter;
*dest = (c >= 'A' && c <= 'Z') ? c + ('a' - 'A') : c;
++iter;
++dest;
}
}
/* static */
void nsContentUtils::ASCIIToLower(const nsAString& aSource, nsAString& aDest) {
return _ASCIIToLowerCopy<nsAString, char16_t>(aSource, aDest);
}
/* static */
void nsContentUtils::ASCIIToLower(const nsACString& aSource,
nsACString& aDest) {
return _ASCIIToLowerCopy<nsACString, char>(aSource, aDest);
}
template <typename StringType, typename CharType>
void _ASCIIToUpperInSitu(StringType& aStr) {
CharType* iter = aStr.BeginWriting();
CharType* end = aStr.EndWriting();
MOZ_ASSERT(iter && end);
while (iter != end) {
CharType c = *iter;
if (c >= 'a' && c <= 'z') {
*iter = c + ('A' - 'a');
}
++iter;
}
}
/* static */
void nsContentUtils::ASCIIToUpper(nsAString& aStr) {
return _ASCIIToUpperInSitu<nsAString, char16_t>(aStr);
}
/* static */
void nsContentUtils::ASCIIToUpper(nsACString& aStr) {
return _ASCIIToUpperInSitu<nsACString, char>(aStr);
}
template <typename StringType, typename CharType>
void _ASCIIToUpperCopy(const StringType& aSource, StringType& aDest) {
uint32_t len = aSource.Length();
aDest.SetLength(len);
MOZ_ASSERT(aDest.Length() == len);
CharType* dest = aDest.BeginWriting();
MOZ_ASSERT(dest);
const CharType* iter = aSource.BeginReading();
const CharType* end = aSource.EndReading();
while (iter != end) {
CharType c = *iter;
*dest = (c >= 'a' && c <= 'z') ? c + ('A' - 'a') : c;
++iter;
++dest;
}
}
/* static */
void nsContentUtils::ASCIIToUpper(const nsAString& aSource, nsAString& aDest) {
return _ASCIIToUpperCopy<nsAString, char16_t>(aSource, aDest);
}
/* static */
void nsContentUtils::ASCIIToUpper(const nsACString& aSource,
nsACString& aDest) {
return _ASCIIToUpperCopy<nsACString, char>(aSource, aDest);
}
/* static */
bool nsContentUtils::EqualsIgnoreASCIICase(const nsAString& aStr1,
const nsAString& aStr2) {
uint32_t len = aStr1.Length();
if (len != aStr2.Length()) {
return false;
}
const char16_t* str1 = aStr1.BeginReading();
const char16_t* str2 = aStr2.BeginReading();
const char16_t* end = str1 + len;
while (str1 < end) {
char16_t c1 = *str1++;
char16_t c2 = *str2++;
// First check if any bits other than the 0x0020 differs
if ((c1 ^ c2) & 0xffdf) {
return false;
}
// We know they can only differ in the 0x0020 bit.
// Likely the two chars are the same, so check that first
if (c1 != c2) {
// They do differ, but since it's only in the 0x0020 bit, check if it's
// the same ascii char, but just differing in case
char16_t c1Upper = c1 & 0xffdf;
if (!('A' <= c1Upper && c1Upper <= 'Z')) {
return false;
}
}
}
return true;
}
/* static */
bool nsContentUtils::StringContainsASCIIUpper(const nsAString& aStr) {
const char16_t* iter = aStr.BeginReading();
const char16_t* end = aStr.EndReading();
while (iter != end) {
char16_t c = *iter;
if (c >= 'A' && c <= 'Z') {
return true;
}
++iter;
}
return false;
}
/* static */
nsIInterfaceRequestor* nsContentUtils::SameOriginChecker() {
if (!sSameOriginChecker) {
sSameOriginChecker = new SameOriginCheckerImpl();
NS_ADDREF(sSameOriginChecker);
}
return sSameOriginChecker;
}
/* static */
nsresult nsContentUtils::CheckSameOrigin(nsIChannel* aOldChannel,
nsIChannel* aNewChannel) {
if (!nsContentUtils::GetSecurityManager()) return NS_ERROR_NOT_AVAILABLE;
nsCOMPtr<nsIPrincipal> oldPrincipal;
nsContentUtils::GetSecurityManager()->GetChannelResultPrincipal(
aOldChannel, getter_AddRefs(oldPrincipal));
nsCOMPtr<nsIURI> newURI;
aNewChannel->GetURI(getter_AddRefs(newURI));
nsCOMPtr<nsIURI> newOriginalURI;
aNewChannel->GetOriginalURI(getter_AddRefs(newOriginalURI));
NS_ENSURE_STATE(oldPrincipal && newURI && newOriginalURI);
nsresult rv = oldPrincipal->CheckMayLoad(newURI, false, false);
if (NS_SUCCEEDED(rv) && newOriginalURI != newURI) {
rv = oldPrincipal->CheckMayLoad(newOriginalURI, false, false);
}
return rv;
}
NS_IMPL_ISUPPORTS(SameOriginCheckerImpl, nsIChannelEventSink,
nsIInterfaceRequestor)
NS_IMETHODIMP
SameOriginCheckerImpl::AsyncOnChannelRedirect(
nsIChannel* aOldChannel, nsIChannel* aNewChannel, uint32_t aFlags,
nsIAsyncVerifyRedirectCallback* cb) {
MOZ_ASSERT(aNewChannel, "Redirecting to null channel?");
nsresult rv = nsContentUtils::CheckSameOrigin(aOldChannel, aNewChannel);
if (NS_SUCCEEDED(rv)) {
cb->OnRedirectVerifyCallback(NS_OK);
}
return rv;
}
NS_IMETHODIMP
SameOriginCheckerImpl::GetInterface(const nsIID& aIID, void** aResult) {
return QueryInterface(aIID, aResult);
}
/* static */
nsresult nsContentUtils::GetASCIIOrigin(nsIPrincipal* aPrincipal,
nsACString& aOrigin) {
MOZ_ASSERT(aPrincipal, "missing principal");
aOrigin.Truncate();
nsCOMPtr<nsIURI> uri;
nsresult rv = aPrincipal->GetURI(getter_AddRefs(uri));
NS_ENSURE_SUCCESS(rv, rv);
if (uri) {
return GetASCIIOrigin(uri, aOrigin);
}
aOrigin.AssignLiteral("null");
return NS_OK;
}
/* static */
nsresult nsContentUtils::GetASCIIOrigin(nsIURI* aURI, nsACString& aOrigin) {
MOZ_ASSERT(aURI, "missing uri");
// For Blob URI, the path is the URL of the owning page.
if (aURI->SchemeIs(BLOBURI_SCHEME)) {
nsAutoCString path;
nsresult rv = aURI->GetPathQueryRef(path);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIURI> uri;
rv = NS_NewURI(getter_AddRefs(uri), path);
if (NS_FAILED(rv)) {
aOrigin.AssignLiteral("null");
return NS_OK;
}
return GetASCIIOrigin(uri, aOrigin);
}
aOrigin.Truncate();
nsCOMPtr<nsIURI> uri = NS_GetInnermostURI(aURI);
NS_ENSURE_TRUE(uri, NS_ERROR_UNEXPECTED);
nsAutoCString host;
nsresult rv = uri->GetAsciiHost(host);
if (NS_SUCCEEDED(rv) && !host.IsEmpty()) {
nsAutoCString userPass;
uri->GetUserPass(userPass);
nsAutoCString prePath;
if (!userPass.IsEmpty()) {
rv = NS_MutateURI(uri).SetUserPass(EmptyCString()).Finalize(uri);
NS_ENSURE_SUCCESS(rv, rv);
}
rv = uri->GetPrePath(prePath);
NS_ENSURE_SUCCESS(rv, rv);
aOrigin = prePath;
} else {
aOrigin.AssignLiteral("null");
}
return NS_OK;
}
/* static */
nsresult nsContentUtils::GetUTFOrigin(nsIPrincipal* aPrincipal,
nsAString& aOrigin) {
MOZ_ASSERT(aPrincipal, "missing principal");
aOrigin.Truncate();
nsAutoCString asciiOrigin;
nsresult rv = GetASCIIOrigin(aPrincipal, asciiOrigin);
NS_ENSURE_SUCCESS(rv, rv);
aOrigin = NS_ConvertUTF8toUTF16(asciiOrigin);
return NS_OK;
}
/* static */
nsresult nsContentUtils::GetUTFOrigin(nsIURI* aURI, nsAString& aOrigin) {
MOZ_ASSERT(aURI, "missing uri");
nsresult rv;
#if defined(MOZ_THUNDERBIRD) || defined(MOZ_SUITE)
// Check if either URI has a special origin.
nsCOMPtr<nsIURIWithSpecialOrigin> uriWithSpecialOrigin =
do_QueryInterface(aURI);
if (uriWithSpecialOrigin) {
nsCOMPtr<nsIURI> origin;
rv = uriWithSpecialOrigin->GetOrigin(getter_AddRefs(origin));
NS_ENSURE_SUCCESS(rv, rv);
return GetUTFOrigin(origin, aOrigin);
}
#endif
nsAutoCString asciiOrigin;
rv = GetASCIIOrigin(aURI, asciiOrigin);
NS_ENSURE_SUCCESS(rv, rv);
aOrigin = NS_ConvertUTF8toUTF16(asciiOrigin);
return NS_OK;
}
/* static */
bool nsContentUtils::CheckMayLoad(nsIPrincipal* aPrincipal,
nsIChannel* aChannel,
bool aAllowIfInheritsPrincipal) {
nsCOMPtr<nsIURI> channelURI;
nsresult rv = NS_GetFinalChannelURI(aChannel, getter_AddRefs(channelURI));
NS_ENSURE_SUCCESS(rv, false);
return NS_SUCCEEDED(
aPrincipal->CheckMayLoad(channelURI, false, aAllowIfInheritsPrincipal));
}
/* static */
bool nsContentUtils::CanAccessNativeAnon() {
return LegacyIsCallerChromeOrNativeCode() || IsCallerContentXBL();
}
/* static */
nsresult nsContentUtils::DispatchXULCommand(nsIContent* aTarget, bool aTrusted,
Event* aSourceEvent,
PresShell* aPresShell, bool aCtrl,
bool aAlt, bool aShift, bool aMeta,
uint16_t aInputSource) {
NS_ENSURE_STATE(aTarget);
Document* doc = aTarget->OwnerDoc();
nsPresContext* presContext = doc->GetPresContext();
RefPtr<XULCommandEvent> xulCommand =
new XULCommandEvent(doc, presContext, nullptr);
xulCommand->InitCommandEvent(NS_LITERAL_STRING("command"), true, true,
nsGlobalWindowInner::Cast(doc->GetInnerWindow()),
0, aCtrl, aAlt, aShift, aMeta, aSourceEvent,
aInputSource, IgnoreErrors());
if (aPresShell) {
nsEventStatus status = nsEventStatus_eIgnore;
return aPresShell->HandleDOMEventWithTarget(aTarget, xulCommand, &status);
}
ErrorResult rv;
aTarget->DispatchEvent(*xulCommand, rv);
return rv.StealNSResult();
}
// static
nsresult nsContentUtils::WrapNative(JSContext* cx, nsISupports* native,
nsWrapperCache* cache, const nsIID* aIID,
JS::MutableHandle<JS::Value> vp,
bool aAllowWrapping) {
MOZ_ASSERT(cx == GetCurrentJSContext());
if (!native) {
vp.setNull();
return NS_OK;
}
JSObject* wrapper = xpc_FastGetCachedWrapper(cx, cache, vp);
if (wrapper) {
return NS_OK;
}
NS_ENSURE_TRUE(sXPConnect, NS_ERROR_UNEXPECTED);
if (!NS_IsMainThread()) {
MOZ_CRASH();
}
JS::Rooted<JSObject*> scope(cx, JS::CurrentGlobalOrNull(cx));
nsresult rv = sXPConnect->WrapNativeToJSVal(cx, scope, native, cache, aIID,
aAllowWrapping, vp);
return rv;
}
nsresult nsContentUtils::CreateArrayBuffer(JSContext* aCx,
const nsACString& aData,
JSObject** aResult) {
if (!aCx) {
return NS_ERROR_FAILURE;
}
int32_t dataLen = aData.Length();
*aResult = JS::NewArrayBuffer(aCx, dataLen);
if (!*aResult) {
return NS_ERROR_FAILURE;
}
if (dataLen > 0) {
NS_ASSERTION(JS::IsArrayBufferObject(*aResult), "What happened?");
JS::AutoCheckCannotGC nogc;
bool isShared;
memcpy(JS::GetArrayBufferData(*aResult, &isShared, nogc),
aData.BeginReading(), dataLen);
MOZ_ASSERT(!isShared);
}
return NS_OK;
}
void nsContentUtils::StripNullChars(const nsAString& aInStr,
nsAString& aOutStr) {
// In common cases where we don't have nulls in the
// string we can simple simply bypass the checking code.
int32_t firstNullPos = aInStr.FindChar('\0');
if (firstNullPos == kNotFound) {
aOutStr.Assign(aInStr);
return;
}
aOutStr.SetCapacity(aInStr.Length() - 1);
nsAString::const_iterator start, end;
aInStr.BeginReading(start);
aInStr.EndReading(end);
while (start != end) {
if (*start != '\0') aOutStr.Append(*start);
++start;
}
}
struct ClassMatchingInfo {
AtomArray mClasses;
nsCaseTreatment mCaseTreatment;
};
// static
bool nsContentUtils::MatchClassNames(Element* aElement, int32_t aNamespaceID,
nsAtom* aAtom, void* aData) {
// We can't match if there are no class names
const nsAttrValue* classAttr = aElement->GetClasses();
if (!classAttr) {
return false;
}
// need to match *all* of the classes
ClassMatchingInfo* info = static_cast<ClassMatchingInfo*>(aData);
uint32_t length = info->mClasses.Length();
if (!length) {
// If we actually had no classes, don't match.
return false;
}
uint32_t i;
for (i = 0; i < length; ++i) {
if (!classAttr->Contains(info->mClasses[i], info->mCaseTreatment)) {
return false;
}
}
return true;
}
// static
void nsContentUtils::DestroyClassNameArray(void* aData) {
ClassMatchingInfo* info = static_cast<ClassMatchingInfo*>(aData);
delete info;
}
// static
void* nsContentUtils::AllocClassMatchingInfo(nsINode* aRootNode,
const nsString* aClasses) {
nsAttrValue attrValue;
attrValue.ParseAtomArray(*aClasses);
// nsAttrValue::Equals is sensitive to order, so we'll send an array
auto* info = new ClassMatchingInfo;
if (attrValue.Type() == nsAttrValue::eAtomArray) {
info->mClasses.SwapElements(*(attrValue.GetAtomArrayValue()));
} else if (attrValue.Type() == nsAttrValue::eAtom) {
info->mClasses.AppendElement(attrValue.GetAtomValue());
}
info->mCaseTreatment =
aRootNode->OwnerDoc()->GetCompatibilityMode() == eCompatibility_NavQuirks
? eIgnoreCase
: eCaseMatters;
return info;
}
// static
bool nsContentUtils::IsFocusedContent(const nsIContent* aContent) {
nsFocusManager* fm = nsFocusManager::GetFocusManager();
return fm && fm->GetFocusedElement() == aContent;
}
bool nsContentUtils::IsSubDocumentTabbable(nsIContent* aContent) {
Document* doc = aContent->GetComposedDoc();
if (!doc) {
return false;
}
// If the subdocument lives in another process, the frame is
// tabbable.
if (EventStateManager::IsRemoteTarget(aContent) ||
BrowserBridgeChild::GetFrom(aContent)) {
return true;
}
// XXXbz should this use OwnerDoc() for GetSubDocumentFor?
// sXBL/XBL2 issue!
Document* subDoc = doc->GetSubDocumentFor(aContent);
if (!subDoc) {
return false;
}
nsCOMPtr<nsIDocShell> docShell = subDoc->GetDocShell();
if (!docShell) {
return false;
}
nsCOMPtr<nsIContentViewer> contentViewer;
docShell->GetContentViewer(getter_AddRefs(contentViewer));
if (!contentViewer) {
return false;
}
// If there are 2 viewers for the current docshell, that
// means the current document may be a zombie document.
// While load and pageshow events are dispatched, zombie viewer is the old,
// to be hidden document.
if (contentViewer->GetPreviousViewer()) {
bool inOnLoad = false;
docShell->GetIsExecutingOnLoadHandler(&inOnLoad);
return inOnLoad;
}
return true;
}
bool nsContentUtils::IsUserFocusIgnored(nsINode* aNode) {
if (!StaticPrefs::dom_mozBrowserFramesEnabled()) {
return false;
}
// Check if our mozbrowser iframe ancestors has ignoreuserfocus attribute.
while (aNode) {
nsCOMPtr<nsIMozBrowserFrame> browserFrame = do_QueryInterface(aNode);
if (browserFrame &&
aNode->AsElement()->HasAttr(kNameSpaceID_None,
nsGkAtoms::ignoreuserfocus) &&
browserFrame->GetReallyIsBrowser()) {
return true;
}
nsPIDOMWindowOuter* win = aNode->OwnerDoc()->GetWindow();
aNode = win ? win->GetFrameElementInternal() : nullptr;
}
return false;
}
bool nsContentUtils::HasScrollgrab(nsIContent* aContent) {
// If we ever standardize this feature we'll want to hook this up properly
// again. For now we're removing all the DOM-side code related to it but
// leaving the layout and APZ handling for it in place.
return false;
}
void nsContentUtils::FlushLayoutForTree(nsPIDOMWindowOuter* aWindow) {
if (!aWindow) {
return;
}
// Note that because FlushPendingNotifications flushes parents, this
// is O(N^2) in docshell tree depth. However, the docshell tree is
// usually pretty shallow.
if (RefPtr<Document> doc = aWindow->GetDoc()) {
doc->FlushPendingNotifications(FlushType::Layout);
}
if (nsCOMPtr<nsIDocShell> docShell = aWindow->GetDocShell()) {
int32_t i = 0, i_end;
docShell->GetInProcessChildCount(&i_end);
for (; i < i_end; ++i) {
nsCOMPtr<nsIDocShellTreeItem> item;
if (docShell->GetInProcessChildAt(i, getter_AddRefs(item)) == NS_OK &&
item) {
if (nsCOMPtr<nsPIDOMWindowOuter> win = item->GetWindow()) {
FlushLayoutForTree(win);
}
}
}
}
}
void nsContentUtils::RemoveNewlines(nsString& aString) { aString.StripCRLF(); }
void nsContentUtils::PlatformToDOMLineBreaks(nsString& aString) {
if (!PlatformToDOMLineBreaks(aString, fallible)) {
aString.AllocFailed(aString.Length());
}
}
bool nsContentUtils::PlatformToDOMLineBreaks(nsString& aString,
const fallible_t& aFallible) {
if (aString.FindChar(char16_t('\r')) != -1) {
// Windows linebreaks: Map CRLF to LF:
if (!aString.ReplaceSubstring(u"\r\n", u"\n", aFallible)) {
return false;
}
// Mac linebreaks: Map any remaining CR to LF:
if (!aString.ReplaceSubstring(u"\r", u"\n", aFallible)) {
return false;
}
}
return true;
}
void nsContentUtils::PopulateStringFromStringBuffer(nsStringBuffer* aBuf,
nsAString& aResultString) {
MOZ_ASSERT(aBuf, "Expecting a non-null string buffer");
uint32_t stringLen = NS_strlen(static_cast<char16_t*>(aBuf->Data()));
// SANITY CHECK: In case the nsStringBuffer isn't correctly
// null-terminated, let's clamp its length using the allocated size, to be
// sure the resulting string doesn't sample past the end of the the buffer.
// (Note that StorageSize() is in units of bytes, so we have to convert that
// to units of PRUnichars, and subtract 1 for the null-terminator.)
uint32_t allocStringLen = (aBuf->StorageSize() / sizeof(char16_t)) - 1;
MOZ_ASSERT(stringLen <= allocStringLen,
"string buffer lacks null terminator!");
stringLen = std::min(stringLen, allocStringLen);
aBuf->ToString(stringLen, aResultString);
}
PresShell* nsContentUtils::FindPresShellForDocument(const Document* aDocument) {
const Document* doc = aDocument;
Document* displayDoc = doc->GetDisplayDocument();
if (displayDoc) {
doc = displayDoc;
}
PresShell* presShell = doc->GetPresShell();
if (presShell) {
return presShell;
}
nsCOMPtr<nsIDocShellTreeItem> docShellTreeItem = doc->GetDocShell();
while (docShellTreeItem) {
// We may be in a display:none subdocument, or we may not have a presshell
// created yet.
// Walk the docshell tree to find the nearest container that has a
// presshell, and return that.
nsCOMPtr<nsIDocShell> docShell = do_QueryInterface(docShellTreeItem);
if (PresShell* presShell = docShell->GetPresShell()) {
return presShell;
}
nsCOMPtr<nsIDocShellTreeItem> parent;
docShellTreeItem->GetInProcessParent(getter_AddRefs(parent));
docShellTreeItem = parent;
}
return nullptr;
}
nsIWidget* nsContentUtils::WidgetForDocument(const Document* aDocument) {
PresShell* presShell = FindPresShellForDocument(aDocument);
if (!presShell) {
return nullptr;
}
nsViewManager* vm = presShell->GetViewManager();
if (!vm) {
return nullptr;
}
nsView* rootView = vm->GetRootView();
if (!rootView) {
return nullptr;
}
nsView* displayRoot = nsViewManager::GetDisplayRootFor(rootView);
if (!displayRoot) {
return nullptr;
}
return displayRoot->GetNearestWidget(nullptr);
}
nsIWidget* nsContentUtils::WidgetForContent(const nsIContent* aContent) {
nsIFrame* frame = aContent->GetPrimaryFrame();
if (frame) {
frame = nsLayoutUtils::GetDisplayRootFrame(frame);
nsView* view = frame->GetView();
if (view) {
return view->GetWidget();
}
}
return nullptr;
}
already_AddRefed<LayerManager> nsContentUtils::LayerManagerForContent(
const nsIContent* aContent) {
nsIWidget* widget = nsContentUtils::WidgetForContent(aContent);
if (widget) {
RefPtr<LayerManager> manager = widget->GetLayerManager();
return manager.forget();
}
return nullptr;
}
static already_AddRefed<LayerManager> LayerManagerForDocumentInternal(
const Document* aDoc, bool aRequirePersistent) {
nsIWidget* widget = nsContentUtils::WidgetForDocument(aDoc);
if (widget) {
RefPtr<LayerManager> manager = widget->GetLayerManager(
aRequirePersistent ? nsIWidget::LAYER_MANAGER_PERSISTENT
: nsIWidget::LAYER_MANAGER_CURRENT);
return manager.forget();
}
return nullptr;
}
already_AddRefed<LayerManager> nsContentUtils::LayerManagerForDocument(
const Document* aDoc) {
return LayerManagerForDocumentInternal(aDoc, false);
}
already_AddRefed<LayerManager>
nsContentUtils::PersistentLayerManagerForDocument(Document* aDoc) {
return LayerManagerForDocumentInternal(aDoc, true);
}
bool nsContentUtils::AllowXULXBLForPrincipal(nsIPrincipal* aPrincipal) {
if (!aPrincipal) {
return false;
}
if (aPrincipal->IsSystemPrincipal()) {
return true;
}
nsCOMPtr<nsIURI> princURI;
aPrincipal->GetURI(getter_AddRefs(princURI));
return princURI &&
((StaticPrefs::dom_allow_XUL_XBL_for_file() &&
SchemeIs(princURI, "file")) ||
IsSitePermAllow(aPrincipal, NS_LITERAL_CSTRING("allowXULXBL")));
}
bool nsContentUtils::IsPDFJSEnabled() {
nsCOMPtr<nsIStreamConverter> conv = do_CreateInstance(
"@mozilla.org/streamconv;1?from=application/pdf&to=text/html");
return conv;
}
already_AddRefed<nsIDocumentLoaderFactory>
nsContentUtils::FindInternalContentViewer(const nsACString& aType,
ContentViewerType* aLoaderType) {
if (aLoaderType) {
*aLoaderType = TYPE_UNSUPPORTED;
}
// one helper factory, please
nsCOMPtr<nsICategoryManager> catMan(
do_GetService(NS_CATEGORYMANAGER_CONTRACTID));
if (!catMan) return nullptr;
nsCOMPtr<nsIDocumentLoaderFactory> docFactory;
nsCString contractID;
nsresult rv =
catMan->GetCategoryEntry("Gecko-Content-Viewers", aType, contractID);
if (NS_SUCCEEDED(rv)) {
docFactory = do_GetService(contractID.get());
if (docFactory && aLoaderType) {
if (contractID.EqualsLiteral(CONTENT_DLF_CONTRACTID))
*aLoaderType = TYPE_CONTENT;
else if (contractID.EqualsLiteral(PLUGIN_DLF_CONTRACTID))
*aLoaderType = TYPE_PLUGIN;
else
*aLoaderType = TYPE_UNKNOWN;
}
return docFactory.forget();
}
if (DecoderTraits::IsSupportedInVideoDocument(aType)) {
docFactory =
do_GetService("@mozilla.org/content/document-loader-factory;1");
if (docFactory && aLoaderType) {
*aLoaderType = TYPE_CONTENT;
}
return docFactory.forget();
}
return nullptr;
}
static void ReportPatternCompileFailure(nsAString& aPattern,
const Document* aDocument,
JSContext* cx) {
MOZ_ASSERT(JS_IsExceptionPending(cx));
JS::RootedValue exn(cx);
if (!JS_GetPendingException(cx, &exn)) {
return;
}
if (!exn.isObject()) {
// If pending exception is not an object, it should be OOM.
return;
}
JS::AutoSaveExceptionState savedExc(cx);
JS::RootedObject exnObj(cx, &exn.toObject());
JS::RootedValue messageVal(cx);
if (!JS_GetProperty(cx, exnObj, "message", &messageVal)) {
return;
}
MOZ_ASSERT(messageVal.isString());
JS::RootedString messageStr(cx, messageVal.toString());
MOZ_ASSERT(messageStr);
AutoTArray<nsString, 2> strings;
strings.AppendElement(aPattern);
if (!AssignJSString(cx, *strings.AppendElement(), messageStr)) {
return;
}
nsContentUtils::ReportToConsole(nsIScriptError::errorFlag,
NS_LITERAL_CSTRING("DOM"), aDocument,
nsContentUtils::eDOM_PROPERTIES,
"PatternAttributeCompileFailure", strings);
savedExc.drop();
}
// static
Maybe<bool> nsContentUtils::IsPatternMatching(nsAString& aValue,
nsAString& aPattern,
const Document* aDocument) {
NS_ASSERTION(aDocument, "aDocument should be a valid pointer (not null)");
// The fact that we're using a JS regexp under the hood should not be visible
// to things like window onerror handlers, so we don't initialize our JSAPI
// with the document's window (which may not exist anyway).
AutoJSAPI jsapi;
jsapi.Init();
JSContext* cx = jsapi.cx();
AutoDisableJSInterruptCallback disabler(cx);
// We can use the junk scope here, because we're just using it for
// regexp evaluation, not actual script execution.
JSAutoRealm ar(cx, xpc::UnprivilegedJunkScope());
// The pattern has to match the entire value.
aPattern.InsertLiteral(u"^(?:", 0);
aPattern.AppendLiteral(")$");
JS::Rooted<JSObject*> re(
cx,
JS::NewUCRegExpObject(cx, static_cast<char16_t*>(aPattern.BeginWriting()),
aPattern.Length(), JS::RegExpFlag::Unicode));
if (!re) {
// Remove extra patterns added above to report with the original pattern.
aPattern.Cut(0, 4);
aPattern.Cut(aPattern.Length() - 2, 2);
ReportPatternCompileFailure(aPattern, aDocument, cx);
return Some(true);
}
JS::Rooted<JS::Value> rval(cx, JS::NullValue());
size_t idx = 0;
if (!JS::ExecuteRegExpNoStatics(cx, re,
static_cast<char16_t*>(aValue.BeginWriting()),
aValue.Length(), &idx, true, &rval)) {
return Nothing();
}
return Some(!rval.isNull());
}
// static
nsresult nsContentUtils::URIInheritsSecurityContext(nsIURI* aURI,
bool* aResult) {
// Note: about:blank URIs do NOT inherit the security context from the
// current document, which is what this function tests for...
return NS_URIChainHasFlags(
aURI, nsIProtocolHandler::URI_INHERITS_SECURITY_CONTEXT, aResult);
}
// static
bool nsContentUtils::ChannelShouldInheritPrincipal(
nsIPrincipal* aLoadingPrincipal, nsIURI* aURI, bool aInheritForAboutBlank,
bool aForceInherit) {
MOZ_ASSERT(aLoadingPrincipal,
"Can not check inheritance without a principal");
// Only tell the channel to inherit if it can't provide its own security
// context.
//
// XXX: If this is ever changed, check all callers for what owners
// they're passing in. In particular, see the code and
// comments in nsDocShell::LoadURI where we fall back on
// inheriting the owner if called from chrome. That would be
// very wrong if this code changed anything but channels that
// can't provide their own security context!
//
// If aForceInherit is true, we will inherit, even for a channel that
// can provide its own security context. This is used for srcdoc loads.
bool inherit = aForceInherit;
if (!inherit) {
bool uriInherits;
// We expect URIInheritsSecurityContext to return success for an
// about:blank URI, so don't call NS_IsAboutBlank() if this call fails.
// This condition needs to match the one in nsDocShell::InternalLoad where
// we're checking for things that will use the owner.
inherit =
(NS_SUCCEEDED(URIInheritsSecurityContext(aURI, &uriInherits)) &&
(uriInherits || (aInheritForAboutBlank && NS_IsAboutBlank(aURI)))) ||
//
// file: uri special-casing
//
// If this is a file: load opened from another file: then it may need
// to inherit the owner from the referrer so they can script each other.
// If we don't set the owner explicitly then each file: gets an owner
// based on its own codebase later.
//
(URIIsLocalFile(aURI) &&
NS_SUCCEEDED(aLoadingPrincipal->CheckMayLoad(aURI, false, false)) &&
// One more check here. CheckMayLoad will always return true for the
// system principal, but we do NOT want to inherit in that case.
!aLoadingPrincipal->IsSystemPrincipal());
}
return inherit;
}
/* static */
const char* nsContentUtils::CheckRequestFullscreenAllowed(
CallerType aCallerType) {
if (!StaticPrefs::full_screen_api_allow_trusted_requests_only() ||
aCallerType == CallerType::System) {
return nullptr;
}
if (!UserActivation::IsHandlingUserInput()) {
return "FullscreenDeniedNotInputDriven";
}
// If more time has elapsed since the user input than is specified by the
// dom.event.handling-user-input-time-limit pref (default 1 second),
// disallow fullscreen
TimeDuration timeout = HandlingUserInputTimeout();
if (timeout > TimeDuration(nullptr) &&
(TimeStamp::Now() - UserActivation::GetHandlingInputStart()) > timeout) {
return "FullscreenDeniedNotInputDriven";
}
// Entering full-screen on mouse mouse event is only allowed with left mouse
// button
if (StaticPrefs::full_screen_api_mouse_event_allow_left_button_only() &&
(EventStateManager::sCurrentMouseBtn == MouseButton::eMiddle ||
EventStateManager::sCurrentMouseBtn == MouseButton::eRight)) {
return "FullscreenDeniedMouseEventOnlyLeftBtn";
}
return nullptr;
}
/* static */
bool nsContentUtils::IsCutCopyAllowed(nsIPrincipal* aSubjectPrincipal) {
if (StaticPrefs::dom_allow_cut_copy() &&
UserActivation::IsHandlingUserInput()) {
return true;
}
return PrincipalHasPermission(aSubjectPrincipal, nsGkAtoms::clipboardWrite);
}
/* static */
bool nsContentUtils::HaveEqualPrincipals(Document* aDoc1, Document* aDoc2) {
if (!aDoc1 || !aDoc2) {
return false;
}
bool principalsEqual = false;
aDoc1->NodePrincipal()->Equals(aDoc2->NodePrincipal(), &principalsEqual);
return principalsEqual;
}
/* static */
bool nsContentUtils::HasPluginWithUncontrolledEventDispatch(
nsIContent* aContent) {
#ifdef XP_MACOSX
// We control dispatch to all mac plugins.
return false;
#else
if (!aContent || !aContent->IsInComposedDoc()) {
return false;
}
nsCOMPtr<nsIObjectLoadingContent> olc = do_QueryInterface(aContent);
if (!olc) {
return false;
}
RefPtr<nsNPAPIPluginInstance> plugin = olc->GetPluginInstance();
if (!plugin) {
return false;
}
bool isWindowless = false;
nsresult res = plugin->IsWindowless(&isWindowless);
if (NS_FAILED(res)) {
return false;
}
return !isWindowless;
#endif
}
/* static */
void nsContentUtils::FireMutationEventsForDirectParsing(
Document* aDoc, nsIContent* aDest, int32_t aOldChildCount) {
// Fire mutation events. Optimize for the case when there are no listeners
int32_t newChildCount = aDest->GetChildCount();
if (newChildCount && nsContentUtils::HasMutationListeners(
aDoc, NS_EVENT_BITS_MUTATION_NODEINSERTED)) {
AutoTArray<nsCOMPtr<nsIContent>, 50> childNodes;
NS_ASSERTION(newChildCount - aOldChildCount >= 0,
"What, some unexpected dom mutation has happened?");
childNodes.SetCapacity(newChildCount - aOldChildCount);
for (nsIContent* child = aDest->GetFirstChild(); child;
child = child->GetNextSibling()) {
childNodes.AppendElement(child);
}
FragmentOrElement::FireNodeInserted(aDoc, aDest, childNodes);
}
}
/* static */
Document* nsContentUtils::GetRootDocument(Document* aDoc) {
if (!aDoc) {
return nullptr;
}
Document* doc = aDoc;
while (doc->GetInProcessParentDocument()) {
doc = doc->GetInProcessParentDocument();
}
return doc;
}
/* static */
bool nsContentUtils::IsInPointerLockContext(nsPIDOMWindowOuter* aWin) {
if (!aWin) {
return false;
}
nsCOMPtr<Document> pointerLockedDoc =
do_QueryReferent(EventStateManager::sPointerLockedDoc);
if (!pointerLockedDoc || !pointerLockedDoc->GetWindow()) {
return false;
}
nsCOMPtr<nsPIDOMWindowOuter> lockTop =
pointerLockedDoc->GetWindow()->GetInProcessScriptableTop();
nsCOMPtr<nsPIDOMWindowOuter> top = aWin->GetInProcessScriptableTop();
return top == lockTop;
}
// static
int32_t nsContentUtils::GetAdjustedOffsetInTextControl(nsIFrame* aOffsetFrame,
int32_t aOffset) {
// The structure of the anonymous frames within a text control frame is
// an optional block frame, followed by an optional br frame.
// If the offset frame has a child, then this frame is the block which
// has the text frames (containing the content) as its children. This will
// be the case if we click to the right of any of the text frames, or at the
// bottom of the text area.
nsIFrame* firstChild = aOffsetFrame->PrincipalChildList().FirstChild();
if (firstChild) {
// In this case, the passed-in offset is incorrect, and we want the length
// of the entire content in the text control frame.
return firstChild->GetContent()->Length();
}
if (aOffsetFrame->GetPrevSibling() && !aOffsetFrame->GetNextSibling()) {
// In this case, we're actually within the last frame, which is a br
// frame. Our offset should therefore be the length of the first child of
// our parent.
int32_t aOutOffset = aOffsetFrame->GetParent()
->PrincipalChildList()
.FirstChild()
->GetContent()
->Length();
return aOutOffset;
}
// Otherwise, we're within one of the text frames, in which case our offset
// has already been correctly calculated.
return aOffset;
}
// static
void nsContentUtils::GetSelectionInTextControl(Selection* aSelection,
Element* aRoot,
uint32_t& aOutStartOffset,
uint32_t& aOutEndOffset) {
MOZ_ASSERT(aSelection && aRoot);
// We don't care which end of this selection is anchor and which is focus. In
// fact, we explicitly want to know which is the _start_ and which is the
// _end_, not anchor vs focus.
const nsRange* range = aSelection->GetAnchorFocusRange();
if (!range) {
// Nothing selected
aOutStartOffset = aOutEndOffset = 0;
return;
}
// All the node pointers here are raw pointers for performance. We shouldn't
// be doing anything in this function that invalidates the node tree.
nsINode* startContainer = range->GetStartContainer();
uint32_t startOffset = range->StartOffset();
nsINode* endContainer = range->GetEndContainer();
uint32_t endOffset = range->EndOffset();
// We have at most two children, consisting of an optional text node followed
// by an optional <br>.
NS_ASSERTION(aRoot->GetChildCount() <= 2, "Unexpected children");
nsIContent* firstChild = aRoot->GetFirstChild();
#ifdef DEBUG
nsCOMPtr<nsIContent> lastChild = aRoot->GetLastChild();
NS_ASSERTION(startContainer == aRoot || startContainer == firstChild ||
startContainer == lastChild,
"Unexpected startContainer");
NS_ASSERTION(endContainer == aRoot || endContainer == firstChild ||
endContainer == lastChild,
"Unexpected endContainer");
// firstChild is either text or a <br> (hence an element).
MOZ_ASSERT_IF(firstChild, firstChild->IsText() || firstChild->IsElement());
#endif
// Testing IsElement() is faster than testing IsNodeOfType(), since it's
// non-virtual.
if (!firstChild || firstChild->IsElement()) {
// No text node, so everything is 0
startOffset = endOffset = 0;
} else {
// First child is text. If the start/end is already in the text node,
// or the start of the root node, no change needed. If it's in the root
// node but not the start, or in the trailing <br>, we need to set the
// offset to the end.
if ((startContainer == aRoot && startOffset != 0) ||
(startContainer != aRoot && startContainer != firstChild)) {
startOffset = firstChild->Length();
}
if ((endContainer == aRoot && endOffset != 0) ||
(endContainer != aRoot && endContainer != firstChild)) {
endOffset = firstChild->Length();
}
}
MOZ_ASSERT(startOffset <= endOffset);
aOutStartOffset = startOffset;
aOutEndOffset = endOffset;
}
HTMLEditor* nsContentUtils::GetHTMLEditor(nsPresContext* aPresContext) {
if (!aPresContext) {
return nullptr;
}
nsCOMPtr<nsIDocShell> docShell(aPresContext->GetDocShell());
bool isEditable;
if (!docShell || NS_FAILED(docShell->GetEditable(&isEditable)) || !isEditable)
return nullptr;
return docShell->GetHTMLEditor();
}
// static
TextEditor* nsContentUtils::GetActiveEditor(nsPresContext* aPresContext) {
if (!aPresContext) {
return nullptr;
}
nsPIDOMWindowOuter* window = aPresContext->Document()->GetWindow();
if (!window) {
return nullptr;
}
// If it's in designMode, nobody can have focus. Therefore, the HTMLEditor
// handles all events. I.e., it's focused editor in this case.
if (aPresContext->Document()->HasFlag(NODE_IS_EDITABLE)) {
return GetHTMLEditor(aPresContext);
}
// If focused element is associated with TextEditor, it must be <input>
// element or <textarea> element. Let's return it even if it's in a
// contenteditable element.
nsCOMPtr<nsPIDOMWindowOuter> focusedWindow;
if (Element* focusedElement = nsFocusManager::GetFocusedDescendant(
window, nsFocusManager::SearchRange::eOnlyCurrentWindow,
getter_AddRefs(focusedWindow))) {
if (TextEditor* textEditor = focusedElement->GetTextEditorInternal()) {
return textEditor;
}
}
// Otherwise, HTMLEditor may handle inputs even non-editable element has
// focus or nobody has focus.
return GetHTMLEditor(aPresContext);
}
// static
TextEditor* nsContentUtils::GetTextEditorFromAnonymousNodeWithoutCreation(
nsIContent* aAnonymousContent) {
if (!aAnonymousContent) {
return nullptr;
}
nsIContent* parent = aAnonymousContent->FindFirstNonChromeOnlyAccessContent();
if (!parent || parent == aAnonymousContent) {
return nullptr;
}
if (HTMLInputElement* inputElement =
HTMLInputElement::FromNodeOrNull(parent)) {
return inputElement->GetTextEditorWithoutCreation();
}
if (HTMLTextAreaElement* textareaElement =
HTMLTextAreaElement::FromNodeOrNull(parent)) {
return textareaElement->GetTextEditorWithoutCreation();
}
return nullptr;
}
// static
bool nsContentUtils::IsForbiddenRequestHeader(const nsACString& aHeader) {
if (IsForbiddenSystemRequestHeader(aHeader)) {
return true;
}
return StringBeginsWith(aHeader, NS_LITERAL_CSTRING("proxy-"),
nsCaseInsensitiveCStringComparator()) ||
StringBeginsWith(aHeader, NS_LITERAL_CSTRING("sec-"),
nsCaseInsensitiveCStringComparator());
}
// static
bool nsContentUtils::IsForbiddenSystemRequestHeader(const nsACString& aHeader) {
static const char* kInvalidHeaders[] = {"accept-charset",
"accept-encoding",
"access-control-request-headers",
"access-control-request-method",
"connection",
"content-length",
"cookie",
"cookie2",
"date",
"dnt",
"expect",
"host",
"keep-alive",
"origin",
"referer",
"te",
"trailer",
"transfer-encoding",
"upgrade",
"via"};
for (auto& kInvalidHeader : kInvalidHeaders) {
if (aHeader.LowerCaseEqualsASCII(kInvalidHeader)) {
return true;
}
}
return false;
}
// static
bool nsContentUtils::IsForbiddenResponseHeader(const nsACString& aHeader) {
return (aHeader.LowerCaseEqualsASCII("set-cookie") ||
aHeader.LowerCaseEqualsASCII("set-cookie2"));
}
// static
bool nsContentUtils::IsCorsUnsafeRequestHeaderValue(
const nsACString& aHeaderValue) {
const char* cur = aHeaderValue.BeginReading();
const char* end = aHeaderValue.EndReading();
while (cur != end) {
// Implementation of
// https://fetch.spec.whatwg.org/#cors-unsafe-request-header-byte Is less
// than a space but not a horizontal tab
if ((*cur < ' ' && *cur != '\t') || *cur == '"' || *cur == '(' ||
*cur == ')' || *cur == ':' || *cur == '<' || *cur == '>' ||
*cur == '?' || *cur == '@' || *cur == '[' || *cur == '\\' ||
*cur == ']' || *cur == '{' || *cur == '}' ||
*cur == 0x7F) { // 0x75 is DEL
return true;
}
cur++;
}
return false;
}
// static
bool nsContentUtils::IsAllowedNonCorsAccept(const nsACString& aHeaderValue) {
if (IsCorsUnsafeRequestHeaderValue(aHeaderValue)) {
return false;
}
return true;
}
// static
bool nsContentUtils::IsAllowedNonCorsContentType(
const nsACString& aHeaderValue) {
nsAutoCString contentType;
nsAutoCString unused;
if (IsCorsUnsafeRequestHeaderValue(aHeaderValue)) {
return false;
}
nsresult rv = NS_ParseRequestContentType(aHeaderValue, contentType, unused);
if (NS_FAILED(rv)) {
return false;
}
return contentType.LowerCaseEqualsLiteral("text/plain") ||
contentType.LowerCaseEqualsLiteral(
"application/x-www-form-urlencoded") ||
contentType.LowerCaseEqualsLiteral("multipart/form-data");
}
// static
bool nsContentUtils::IsAllowedNonCorsLanguage(const nsACString& aHeaderValue) {
const char* cur = aHeaderValue.BeginReading();
const char* end = aHeaderValue.EndReading();
while (cur != end) {
if ((*cur >= '0' && *cur <= '9') || (*cur >= 'A' && *cur <= 'Z') ||
(*cur >= 'a' && *cur <= 'z') || *cur == ' ' || *cur == '*' ||
*cur == ',' || *cur == '-' || *cur == '.' || *cur == ';' ||
*cur == '=') {
cur++;
continue;
}
return false;
}
return true;
}
// static
bool nsContentUtils::IsCORSSafelistedRequestHeader(const nsACString& aName,
const nsACString& aValue) {
// see https://fetch.spec.whatwg.org/#cors-safelisted-request-header
if (aValue.Length() > 128) {
return false;
}
return (aName.LowerCaseEqualsLiteral("accept") &&
nsContentUtils::IsAllowedNonCorsAccept(aValue)) ||
(aName.LowerCaseEqualsLiteral("accept-language") &&
nsContentUtils::IsAllowedNonCorsLanguage(aValue)) ||
(aName.LowerCaseEqualsLiteral("content-language") &&
nsContentUtils::IsAllowedNonCorsLanguage(aValue)) ||
(aName.LowerCaseEqualsLiteral("content-type") &&
nsContentUtils::IsAllowedNonCorsContentType(aValue));
}
mozilla::LogModule* nsContentUtils::DOMDumpLog() { return sDOMDumpLog; }
bool nsContentUtils::GetNodeTextContent(nsINode* aNode, bool aDeep,
nsAString& aResult,
const fallible_t& aFallible) {
aResult.Truncate();
return AppendNodeTextContent(aNode, aDeep, aResult, aFallible);
}
void nsContentUtils::GetNodeTextContent(nsINode* aNode, bool aDeep,
nsAString& aResult) {
if (!GetNodeTextContent(aNode, aDeep, aResult, fallible)) {
NS_ABORT_OOM(0); // Unfortunately we don't know the allocation size
}
}
void nsContentUtils::DestroyMatchString(void* aData) {
if (aData) {
nsString* matchString = static_cast<nsString*>(aData);
delete matchString;
}
}
bool nsContentUtils::IsJavascriptMIMEType(const nsAString& aMIMEType) {
// Table ordered from most to least likely JS MIME types.
static const char* jsTypes[] = {"text/javascript",
"text/ecmascript",
"application/javascript",
"application/ecmascript",
"application/x-javascript",
"application/x-ecmascript",
"text/javascript1.0",
"text/javascript1.1",
"text/javascript1.2",
"text/javascript1.3",
"text/javascript1.4",
"text/javascript1.5",
"text/jscript",
"text/livescript",
"text/x-ecmascript",
"text/x-javascript",
nullptr};
for (uint32_t i = 0; jsTypes[i]; ++i) {
if (aMIMEType.LowerCaseEqualsASCII(jsTypes[i])) {
return true;
}
}
#ifdef JS_BUILD_BINAST
if (nsJSUtils::BinASTEncodingEnabled() &&
aMIMEType.LowerCaseEqualsASCII(APPLICATION_JAVASCRIPT_BINAST)) {
return true;
}
#endif
return false;
}
nsresult nsContentUtils::GenerateUUIDInPlace(nsID& aUUID) {
MOZ_ASSERT(sUUIDGenerator);
nsresult rv = sUUIDGenerator->GenerateUUIDInPlace(&aUUID);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
bool nsContentUtils::PrefetchPreloadEnabled(nsIDocShell* aDocShell) {
//
// SECURITY CHECK: disable prefetching and preloading from mailnews!
//
// walk up the docshell tree to see if any containing
// docshell are of type MAIL.
//
if (!aDocShell) {
return false;
}
nsCOMPtr<nsIDocShell> docshell = aDocShell;
nsCOMPtr<nsIDocShellTreeItem> parentItem;
do {
auto appType = docshell->GetAppType();
if (appType == nsIDocShell::APP_TYPE_MAIL) {
return false; // do not prefetch, preload, preconnect from mailnews
}
docshell->GetInProcessParent(getter_AddRefs(parentItem));
if (parentItem) {
docshell = do_QueryInterface(parentItem);
if (!docshell) {
NS_ERROR("cannot get a docshell from a treeItem!");
return false;
}
}
} while (parentItem);
return true;
}
uint64_t nsContentUtils::GetInnerWindowID(nsIRequest* aRequest) {
// can't do anything if there's no nsIRequest!
if (!aRequest) {
return 0;
}
nsCOMPtr<nsILoadGroup> loadGroup;
nsresult rv = aRequest->GetLoadGroup(getter_AddRefs(loadGroup));
if (NS_FAILED(rv) || !loadGroup) {
return 0;
}
return GetInnerWindowID(loadGroup);
}
uint64_t nsContentUtils::GetInnerWindowID(nsILoadGroup* aLoadGroup) {
if (!aLoadGroup) {
return 0;
}
nsCOMPtr<nsIInterfaceRequestor> callbacks;
nsresult rv = aLoadGroup->GetNotificationCallbacks(getter_AddRefs(callbacks));
if (NS_FAILED(rv) || !callbacks) {
return 0;
}
nsCOMPtr<nsILoadContext> loadContext = do_GetInterface(callbacks);
if (!loadContext) {
return 0;
}
nsCOMPtr<mozIDOMWindowProxy> window;
rv = loadContext->GetAssociatedWindow(getter_AddRefs(window));
if (NS_FAILED(rv) || !window) {
return 0;
}
auto* pwindow = nsPIDOMWindowOuter::From(window);
if (!pwindow) {
return 0;
}
nsPIDOMWindowInner* inner = pwindow->GetCurrentInnerWindow();
return inner ? inner->WindowID() : 0;
}
nsresult nsContentUtils::GetHostOrIPv6WithBrackets(nsIURI* aURI,
nsCString& aHost) {
aHost.Truncate();
nsresult rv = aURI->GetHost(aHost);
if (NS_FAILED(rv)) { // Some URIs do not have a host
return rv;
}
if (aHost.FindChar(':') != -1) { // Escape IPv6 address
MOZ_ASSERT(!aHost.Length() ||
(aHost[0] != '[' && aHost[aHost.Length() - 1] != ']'));
aHost.Insert('[', 0);
aHost.Append(']');
}
return NS_OK;
}
nsresult nsContentUtils::GetHostOrIPv6WithBrackets(nsIURI* aURI,
nsAString& aHost) {
nsAutoCString hostname;
nsresult rv = GetHostOrIPv6WithBrackets(aURI, hostname);
if (NS_FAILED(rv)) {
return rv;
}
CopyUTF8toUTF16(hostname, aHost);
return NS_OK;
}
bool nsContentUtils::CallOnAllRemoteChildren(
MessageBroadcaster* aManager, CallOnRemoteChildFunction aCallback,
void* aArg) {
uint32_t browserChildCount = aManager->ChildCount();
for (uint32_t j = 0; j < browserChildCount; ++j) {
RefPtr<MessageListenerManager> childMM = aManager->GetChildAt(j);
if (!childMM) {
continue;
}
RefPtr<MessageBroadcaster> nonLeafMM = MessageBroadcaster::From(childMM);
if (nonLeafMM) {
if (CallOnAllRemoteChildren(nonLeafMM, aCallback, aArg)) {
return true;
}
continue;
}
mozilla::dom::ipc::MessageManagerCallback* cb = childMM->GetCallback();
if (cb) {
nsFrameLoader* fl = static_cast<nsFrameLoader*>(cb);
BrowserParent* remote = BrowserParent::GetFrom(fl);
if (remote && aCallback) {
if (aCallback(remote, aArg)) {
return true;
}
}
}
}
return false;
}
void nsContentUtils::CallOnAllRemoteChildren(
nsPIDOMWindowOuter* aWindow, CallOnRemoteChildFunction aCallback,
void* aArg) {
nsGlobalWindowOuter* window = nsGlobalWindowOuter::Cast(aWindow);
if (window->IsChromeWindow()) {
RefPtr<MessageBroadcaster> windowMM = window->GetMessageManager();
if (windowMM) {
CallOnAllRemoteChildren(windowMM, aCallback, aArg);
}
}
}
struct UIStateChangeInfo {
UIStateChangeType mShowFocusRings;
explicit UIStateChangeInfo(UIStateChangeType aShowFocusRings)
: mShowFocusRings(aShowFocusRings) {}
};
bool SetKeyboardIndicatorsChild(BrowserParent* aParent, void* aArg) {
UIStateChangeInfo* stateInfo = static_cast<UIStateChangeInfo*>(aArg);
Unused << aParent->SendSetKeyboardIndicators(stateInfo->mShowFocusRings);
return false;
}
void nsContentUtils::SetKeyboardIndicatorsOnRemoteChildren(
nsPIDOMWindowOuter* aWindow, UIStateChangeType aShowFocusRings) {
UIStateChangeInfo stateInfo(aShowFocusRings);
CallOnAllRemoteChildren(aWindow, SetKeyboardIndicatorsChild,
(void*)&stateInfo);
}
nsresult nsContentUtils::IPCTransferableToTransferable(
const IPCDataTransfer& aDataTransfer, const bool& aIsPrivateData,
nsIPrincipal* aRequestingPrincipal,
const nsContentPolicyType& aContentPolicyType,
nsITransferable* aTransferable, mozilla::dom::ContentParent* aContentParent,
mozilla::dom::BrowserChild* aBrowserChild) {
nsresult rv;
aTransferable->SetIsPrivateData(aIsPrivateData);
const nsTArray<IPCDataTransferItem>& items = aDataTransfer.items();
for (const auto& item : items) {
aTransferable->AddDataFlavor(item.flavor().get());
if (item.data().type() == IPCDataTransferData::TnsString) {
nsCOMPtr<nsISupportsString> dataWrapper =
do_CreateInstance(NS_SUPPORTS_STRING_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
const nsString& text = item.data().get_nsString();
rv = dataWrapper->SetData(text);
NS_ENSURE_SUCCESS(rv, rv);
rv = aTransferable->SetTransferData(item.flavor().get(), dataWrapper);
NS_ENSURE_SUCCESS(rv, rv);
} else if (item.data().type() == IPCDataTransferData::TShmem) {
if (nsContentUtils::IsFlavorImage(item.flavor())) {
nsCOMPtr<imgIContainer> imageContainer;
rv = nsContentUtils::DataTransferItemToImage(
item, getter_AddRefs(imageContainer));
NS_ENSURE_SUCCESS(rv, rv);
aTransferable->SetTransferData(item.flavor().get(), imageContainer);
} else {
nsCOMPtr<nsISupportsCString> dataWrapper =
do_CreateInstance(NS_SUPPORTS_CSTRING_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
// The buffer contains the terminating null.
Shmem itemData = item.data().get_Shmem();
const nsDependentCSubstring text(itemData.get<char>(),
itemData.Size<char>());
rv = dataWrapper->SetData(text);
NS_ENSURE_SUCCESS(rv, rv);
rv = aTransferable->SetTransferData(item.flavor().get(), dataWrapper);
NS_ENSURE_SUCCESS(rv, rv);
}
if (aContentParent) {
Unused << aContentParent->DeallocShmem(item.data().get_Shmem());
} else if (aBrowserChild) {
Unused << aBrowserChild->DeallocShmem(item.data().get_Shmem());
}
}
}
aTransferable->SetRequestingPrincipal(aRequestingPrincipal);
aTransferable->SetContentPolicyType(aContentPolicyType);
return NS_OK;
}
void nsContentUtils::TransferablesToIPCTransferables(
nsIArray* aTransferables, nsTArray<IPCDataTransfer>& aIPC,
bool aInSyncMessage, mozilla::dom::ContentChild* aChild,
mozilla::dom::ContentParent* aParent) {
aIPC.Clear();
if (aTransferables) {
uint32_t transferableCount = 0;
aTransferables->GetLength(&transferableCount);
for (uint32_t i = 0; i < transferableCount; ++i) {
IPCDataTransfer* dt = aIPC.AppendElement();
nsCOMPtr<nsITransferable> transferable =
do_QueryElementAt(aTransferables, i);
TransferableToIPCTransferable(transferable, dt, aInSyncMessage, aChild,
aParent);
}
}
}
nsresult nsContentUtils::SlurpFileToString(nsIFile* aFile,
nsACString& aString) {
aString.Truncate();
nsCOMPtr<nsIURI> fileURI;
nsresult rv = NS_NewFileURI(getter_AddRefs(fileURI), aFile);
if (NS_FAILED(rv)) {
return rv;
}
nsCOMPtr<nsIChannel> channel;
rv = NS_NewChannel(getter_AddRefs(channel), fileURI,
nsContentUtils::GetSystemPrincipal(),
nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_DATA_IS_NULL,
nsIContentPolicy::TYPE_OTHER);
if (NS_FAILED(rv)) {
return rv;
}
nsCOMPtr<nsIInputStream> stream;
rv = channel->Open(getter_AddRefs(stream));
if (NS_FAILED(rv)) {
return rv;
}
rv = NS_ConsumeStream(stream, UINT32_MAX, aString);
if (NS_FAILED(rv)) {
return rv;
}
rv = stream->Close();
if (NS_FAILED(rv)) {
return rv;
}
return NS_OK;
}
bool nsContentUtils::IsFileImage(nsIFile* aFile, nsACString& aType) {
nsCOMPtr<nsIMIMEService> mime = do_GetService("@mozilla.org/mime;1");
if (!mime) {
return false;
}
nsresult rv = mime->GetTypeFromFile(aFile, aType);
if (NS_FAILED(rv)) {
return false;
}
return StringBeginsWith(aType, NS_LITERAL_CSTRING("image/"));
}
nsresult nsContentUtils::CalculateBufferSizeForImage(
const uint32_t& aStride, const IntSize& aImageSize,
const SurfaceFormat& aFormat, size_t* aMaxBufferSize,
size_t* aUsedBufferSize) {
CheckedInt32 requiredBytes =
CheckedInt32(aStride) * CheckedInt32(aImageSize.height);
CheckedInt32 usedBytes =
requiredBytes - aStride +
(CheckedInt32(aImageSize.width) * BytesPerPixel(aFormat));
if (!usedBytes.isValid()) {
return NS_ERROR_FAILURE;
}
MOZ_ASSERT(requiredBytes.isValid(), "usedBytes valid but not required?");
*aMaxBufferSize = requiredBytes.value();
*aUsedBufferSize = usedBytes.value();
return NS_OK;
}
nsresult nsContentUtils::DataTransferItemToImage(
const IPCDataTransferItem& aItem, imgIContainer** aContainer) {
MOZ_ASSERT(aItem.data().type() == IPCDataTransferData::TShmem);
MOZ_ASSERT(IsFlavorImage(aItem.flavor()));
const IPCDataTransferImage& imageDetails = aItem.imageDetails();
const IntSize size(imageDetails.width(), imageDetails.height());
if (!size.width || !size.height) {
return NS_ERROR_FAILURE;
}
Shmem data = aItem.data().get_Shmem();
// Validate shared memory buffer size
size_t imageBufLen = 0;
size_t maxBufLen = 0;
nsresult rv = CalculateBufferSizeForImage(imageDetails.stride(), size,
imageDetails.format(), &maxBufLen,
&imageBufLen);
if (NS_FAILED(rv)) {
return rv;
}
if (imageBufLen > data.Size<uint8_t>()) {
return NS_ERROR_FAILURE;
}
RefPtr<DataSourceSurface> image = CreateDataSourceSurfaceFromData(
size, imageDetails.format(), data.get<uint8_t>(), imageDetails.stride());
RefPtr<gfxDrawable> drawable = new gfxSurfaceDrawable(image, size);
nsCOMPtr<imgIContainer> imageContainer =
image::ImageOps::CreateFromDrawable(drawable);
imageContainer.forget(aContainer);
return NS_OK;
}
bool nsContentUtils::IsFlavorImage(const nsACString& aFlavor) {
return aFlavor.EqualsLiteral(kNativeImageMime) ||
aFlavor.EqualsLiteral(kJPEGImageMime) ||
aFlavor.EqualsLiteral(kJPGImageMime) ||
aFlavor.EqualsLiteral(kPNGImageMime) ||
aFlavor.EqualsLiteral(kGIFImageMime);
}
static Shmem ConvertToShmem(mozilla::dom::ContentChild* aChild,
mozilla::dom::ContentParent* aParent,
const nsACString& aInput) {
MOZ_ASSERT((aChild && !aParent) || (!aChild && aParent));
IShmemAllocator* allocator = aChild ? static_cast<IShmemAllocator*>(aChild)
: static_cast<IShmemAllocator*>(aParent);
Shmem result;
if (!allocator->AllocShmem(aInput.Length(), SharedMemory::TYPE_BASIC,
&result)) {
return result;
}
memcpy(result.get<char>(), aInput.BeginReading(), aInput.Length());
return result;
}
void nsContentUtils::TransferableToIPCTransferable(
nsITransferable* aTransferable, IPCDataTransfer* aIPCDataTransfer,
bool aInSyncMessage, mozilla::dom::ContentChild* aChild,
mozilla::dom::ContentParent* aParent) {
MOZ_ASSERT((aChild && !aParent) || (!aChild && aParent));
if (aTransferable) {
nsTArray<nsCString> flavorList;
aTransferable->FlavorsTransferableCanExport(flavorList);
for (uint32_t j = 0; j < flavorList.Length(); ++j) {
nsCString& flavorStr = flavorList[j];
if (!flavorStr.Length()) {
continue;
}
nsCOMPtr<nsISupports> data;
nsresult rv =
aTransferable->GetTransferData(flavorStr.get(), getter_AddRefs(data));
if (NS_FAILED(rv) || !data) {
if (aInSyncMessage) {
// Can't do anything.
continue;
}
// This is a hack to support kFilePromiseMime.
// On Windows there just needs to be an entry for it,
// and for OSX we need to create
// nsContentAreaDragDropDataProvider as nsIFlavorDataProvider.
if (flavorStr.EqualsLiteral(kFilePromiseMime)) {
IPCDataTransferItem* item = aIPCDataTransfer->items().AppendElement();
item->flavor() = flavorStr;
item->data() = NS_ConvertUTF8toUTF16(flavorStr);
continue;
}
// Empty element, transfer only the flavor
IPCDataTransferItem* item = aIPCDataTransfer->items().AppendElement();
item->flavor() = flavorStr;
item->data() = nsString();
continue;
}
if (nsCOMPtr<nsISupportsString> text = do_QueryInterface(data)) {
nsAutoString dataAsString;
text->GetData(dataAsString);
IPCDataTransferItem* item = aIPCDataTransfer->items().AppendElement();
item->flavor() = flavorStr;
item->data() = dataAsString;
} else if (nsCOMPtr<nsISupportsCString> ctext = do_QueryInterface(data)) {
nsAutoCString dataAsString;
ctext->GetData(dataAsString);
Shmem dataAsShmem = ConvertToShmem(aChild, aParent, dataAsString);
if (!dataAsShmem.IsReadable() || !dataAsShmem.Size<char>()) {
continue;
}
IPCDataTransferItem* item = aIPCDataTransfer->items().AppendElement();
item->flavor() = flavorStr;
item->data() = std::move(dataAsShmem);
} else if (nsCOMPtr<nsIInputStream> stream = do_QueryInterface(data)) {
// Images to be pasted on the clipboard are nsIInputStreams
nsCString imageData;
NS_ConsumeStream(stream, UINT32_MAX, imageData);
Shmem imageDataShmem = ConvertToShmem(aChild, aParent, imageData);
if (!imageDataShmem.IsReadable() || !imageDataShmem.Size<char>()) {
continue;
}
IPCDataTransferItem* item = aIPCDataTransfer->items().AppendElement();
item->flavor() = flavorStr;
item->data() = std::move(imageDataShmem);
} else if (nsCOMPtr<imgIContainer> image = do_QueryInterface(data)) {
// Images to be placed on the clipboard are imgIContainers.
RefPtr<mozilla::gfx::SourceSurface> surface = image->GetFrame(
imgIContainer::FRAME_CURRENT,
imgIContainer::FLAG_SYNC_DECODE | imgIContainer::FLAG_ASYNC_NOTIFY);
if (!surface) {
continue;
}
RefPtr<mozilla::gfx::DataSourceSurface> dataSurface =
surface->GetDataSurface();
if (!dataSurface) {
continue;
}
size_t length;
int32_t stride;
IShmemAllocator* allocator =
aChild ? static_cast<IShmemAllocator*>(aChild)
: static_cast<IShmemAllocator*>(aParent);
Maybe<Shmem> surfaceData =
GetSurfaceData(dataSurface, &length, &stride, allocator);
if (surfaceData.isNothing()) {
continue;
}
IPCDataTransferItem* item = aIPCDataTransfer->items().AppendElement();
item->flavor() = flavorStr;
// Turn item->data() into an nsCString prior to accessing it.
item->data() = std::move(surfaceData.ref());
IPCDataTransferImage& imageDetails = item->imageDetails();
mozilla::gfx::IntSize size = dataSurface->GetSize();
imageDetails.width() = size.width;
imageDetails.height() = size.height;
imageDetails.stride() = stride;
imageDetails.format() = dataSurface->GetFormat();
} else {
// Otherwise, handle this as a file.
nsCOMPtr<BlobImpl> blobImpl;
if (nsCOMPtr<nsIFile> file = do_QueryInterface(data)) {
// If we can send this over as a blob, do so. Otherwise, we're
// responding to a sync message and the child can't process the blob
// constructor before processing our response, which would crash. In
// that case, hope that the caller is nsClipboardProxy::GetData,
// called from editor and send over images as raw data.
if (aInSyncMessage) {
nsAutoCString type;
if (IsFileImage(file, type)) {
nsAutoCString data;
SlurpFileToString(file, data);
Shmem dataAsShmem = ConvertToShmem(aChild, aParent, data);
if (!dataAsShmem.IsReadable() || !dataAsShmem.Size<char>()) {
continue;
}
IPCDataTransferItem* item =
aIPCDataTransfer->items().AppendElement();
item->flavor() = type;
item->data() = std::move(dataAsShmem);
}
continue;
}
if (aParent) {
bool isDir = false;
if (NS_SUCCEEDED(file->IsDirectory(&isDir)) && isDir) {
nsAutoString path;
if (NS_WARN_IF(NS_FAILED(file->GetPath(path)))) {
continue;
}
RefPtr<FileSystemSecurity> fss =
FileSystemSecurity::GetOrCreate();
fss->GrantAccessToContentProcess(aParent->ChildID(), path);
}
}
blobImpl = new FileBlobImpl(file);
IgnoredErrorResult rv;
// Ensure that file data is cached no that the content process
// has this data available to it when passed over:
blobImpl->GetSize(rv);
if (NS_WARN_IF(rv.Failed())) {
continue;
}
blobImpl->GetLastModified(rv);
if (NS_WARN_IF(rv.Failed())) {
continue;
}
} else {
if (aInSyncMessage) {
// Can't do anything.
continue;
}
blobImpl = do_QueryInterface(data);
}
if (blobImpl) {
IPCDataTransferData data;
IPCBlob ipcBlob;
// If we failed to create the blob actor, then this blob probably
// can't get the file size for the underlying file, ignore it for
// now. TODO pass this through anyway.
if (aChild) {
nsresult rv = IPCBlobUtils::Serialize(blobImpl, aChild, ipcBlob);
if (NS_WARN_IF(NS_FAILED(rv))) {
continue;
}
data = ipcBlob;
} else if (aParent) {
nsresult rv = IPCBlobUtils::Serialize(blobImpl, aParent, ipcBlob);
if (NS_WARN_IF(NS_FAILED(rv))) {
continue;
}
data = ipcBlob;
}
IPCDataTransferItem* item = aIPCDataTransfer->items().AppendElement();
item->flavor() = flavorStr;
item->data() = data;
}
}
}
}
}
namespace {
// The default type used for calling GetSurfaceData(). Gets surface data as
// raw buffer.
struct GetSurfaceDataRawBuffer {
using ReturnType = mozilla::UniquePtr<char[]>;
using BufferType = char*;
ReturnType Allocate(size_t aSize) { return ReturnType(new char[aSize]); }
static BufferType GetBuffer(const ReturnType& aReturnValue) {
return aReturnValue.get();
}
static ReturnType NullValue() { return ReturnType(); }
};
// The type used for calling GetSurfaceData() that allocates and writes to
// a shared memory buffer.
struct GetSurfaceDataShmem {
using ReturnType = Maybe<Shmem>;
using BufferType = char*;
explicit GetSurfaceDataShmem(IShmemAllocator* aAllocator)
: mAllocator(aAllocator) {}
ReturnType Allocate(size_t aSize) {
Shmem shmem;
if (!mAllocator->AllocShmem(aSize, SharedMemory::TYPE_BASIC, &shmem)) {
return Nothing();
}
return Some(shmem);
}
static BufferType GetBuffer(const ReturnType& aReturnValue) {
return aReturnValue.isSome() ? aReturnValue.ref().get<char>() : nullptr;
}
static ReturnType NullValue() { return ReturnType(); }
private:
IShmemAllocator* mAllocator;
};
/*
* Get the pixel data from the given source surface and return it as a buffer.
* The length and stride will be assigned from the surface.
*/
template <typename GetSurfaceDataContext = GetSurfaceDataRawBuffer>
typename GetSurfaceDataContext::ReturnType GetSurfaceDataImpl(
mozilla::gfx::DataSourceSurface* aSurface, size_t* aLength,
int32_t* aStride,
GetSurfaceDataContext aContext = GetSurfaceDataContext()) {
mozilla::gfx::DataSourceSurface::MappedSurface map;
if (!aSurface->Map(mozilla::gfx::DataSourceSurface::MapType::READ, &map)) {
return GetSurfaceDataContext::NullValue();
}
size_t bufLen = 0;
size_t maxBufLen = 0;
nsresult rv = nsContentUtils::CalculateBufferSizeForImage(
map.mStride, aSurface->GetSize(), aSurface->GetFormat(), &maxBufLen,
&bufLen);
if (NS_FAILED(rv)) {
aSurface->Unmap();
return GetSurfaceDataContext::NullValue();
}
// nsDependentCString wants null-terminated string.
typename GetSurfaceDataContext::ReturnType surfaceData =
aContext.Allocate(maxBufLen + 1);
if (GetSurfaceDataContext::GetBuffer(surfaceData)) {
memcpy(GetSurfaceDataContext::GetBuffer(surfaceData),
reinterpret_cast<char*>(map.mData), bufLen);
memset(GetSurfaceDataContext::GetBuffer(surfaceData) + bufLen, 0,
maxBufLen - bufLen + 1);
}
*aLength = maxBufLen;
*aStride = map.mStride;
aSurface->Unmap();
return surfaceData;
}
} // Anonymous namespace.
mozilla::UniquePtr<char[]> nsContentUtils::GetSurfaceData(
NotNull<mozilla::gfx::DataSourceSurface*> aSurface, size_t* aLength,
int32_t* aStride) {
return GetSurfaceDataImpl(aSurface, aLength, aStride);
}
Maybe<Shmem> nsContentUtils::GetSurfaceData(
mozilla::gfx::DataSourceSurface* aSurface, size_t* aLength,
int32_t* aStride, IShmemAllocator* aAllocator) {
return GetSurfaceDataImpl(aSurface, aLength, aStride,
GetSurfaceDataShmem(aAllocator));
}
mozilla::Modifiers nsContentUtils::GetWidgetModifiers(int32_t aModifiers) {
Modifiers result = 0;
if (aModifiers & nsIDOMWindowUtils::MODIFIER_SHIFT) {
result |= mozilla::MODIFIER_SHIFT;
}
if (aModifiers & nsIDOMWindowUtils::MODIFIER_CONTROL) {
result |= mozilla::MODIFIER_CONTROL;
}
if (aModifiers & nsIDOMWindowUtils::MODIFIER_ALT) {
result |= mozilla::MODIFIER_ALT;
}
if (aModifiers & nsIDOMWindowUtils::MODIFIER_META) {
result |= mozilla::MODIFIER_META;
}
if (aModifiers & nsIDOMWindowUtils::MODIFIER_ALTGRAPH) {
result |= mozilla::MODIFIER_ALTGRAPH;
}
if (aModifiers & nsIDOMWindowUtils::MODIFIER_CAPSLOCK) {
result |= mozilla::MODIFIER_CAPSLOCK;
}
if (aModifiers & nsIDOMWindowUtils::MODIFIER_FN) {
result |= mozilla::MODIFIER_FN;
}
if (aModifiers & nsIDOMWindowUtils::MODIFIER_FNLOCK) {
result |= mozilla::MODIFIER_FNLOCK;
}
if (aModifiers & nsIDOMWindowUtils::MODIFIER_NUMLOCK) {
result |= mozilla::MODIFIER_NUMLOCK;
}
if (aModifiers & nsIDOMWindowUtils::MODIFIER_SCROLLLOCK) {
result |= mozilla::MODIFIER_SCROLLLOCK;
}
if (aModifiers & nsIDOMWindowUtils::MODIFIER_SYMBOL) {
result |= mozilla::MODIFIER_SYMBOL;
}
if (aModifiers & nsIDOMWindowUtils::MODIFIER_SYMBOLLOCK) {
result |= mozilla::MODIFIER_SYMBOLLOCK;
}
if (aModifiers & nsIDOMWindowUtils::MODIFIER_OS) {
result |= mozilla::MODIFIER_OS;
}
return result;
}
nsIWidget* nsContentUtils::GetWidget(PresShell* aPresShell, nsPoint* aOffset) {
if (!aPresShell) {
return nullptr;
}
nsIFrame* frame = aPresShell->GetRootFrame();
if (!frame) {
return nullptr;
}
return frame->GetView()->GetNearestWidget(aOffset);
}
int16_t nsContentUtils::GetButtonsFlagForButton(int32_t aButton) {
switch (aButton) {
case -1:
return MouseButtonsFlag::eNoButtons;
case MouseButton::eLeft:
return MouseButtonsFlag::eLeftFlag;
case MouseButton::eMiddle:
return MouseButtonsFlag::eMiddleFlag;
case MouseButton::eRight:
return MouseButtonsFlag::eRightFlag;
case 4:
return MouseButtonsFlag::e4thFlag;
case 5:
return MouseButtonsFlag::e5thFlag;
default:
NS_ERROR("Button not known.");
return 0;
}
}
LayoutDeviceIntPoint nsContentUtils::ToWidgetPoint(
const CSSPoint& aPoint, const nsPoint& aOffset,
nsPresContext* aPresContext) {
return LayoutDeviceIntPoint::FromAppUnitsRounded(
(CSSPoint::ToAppUnits(aPoint) + aOffset)
.ApplyResolution(nsLayoutUtils::GetCurrentAPZResolutionScale(
aPresContext->PresShell())),
aPresContext->AppUnitsPerDevPixel());
}
nsView* nsContentUtils::GetViewToDispatchEvent(nsPresContext* aPresContext,
PresShell** aPresShell) {
if (!aPresContext || !aPresShell) {
return nullptr;
}
RefPtr<PresShell> presShell = aPresContext->PresShell();
if (NS_WARN_IF(!presShell)) {
*aPresShell = nullptr;
return nullptr;
}
nsViewManager* viewManager = presShell->GetViewManager();
if (!viewManager) {
presShell.forget(aPresShell); // XXX Is this intentional?
return nullptr;
}
presShell.forget(aPresShell);
return viewManager->GetRootView();
}
nsresult nsContentUtils::SendMouseEvent(
mozilla::PresShell* aPresShell, const nsAString& aType, float aX, float aY,
int32_t aButton, int32_t aButtons, int32_t aClickCount, int32_t aModifiers,
bool aIgnoreRootScrollFrame, float aPressure,
unsigned short aInputSourceArg, uint32_t aIdentifier, bool aToWindow,
bool* aPreventDefault, bool aIsDOMEventSynthesized,
bool aIsWidgetEventSynthesized) {
nsPoint offset;
nsCOMPtr<nsIWidget> widget = GetWidget(aPresShell, &offset);
if (!widget) return NS_ERROR_FAILURE;
EventMessage msg;
WidgetMouseEvent::ExitFrom exitFrom = WidgetMouseEvent::eChild;
bool contextMenuKey = false;
if (aType.EqualsLiteral("mousedown")) {
msg = eMouseDown;
} else if (aType.EqualsLiteral("mouseup")) {
msg = eMouseUp;
} else if (aType.EqualsLiteral("mousemove")) {
msg = eMouseMove;
} else if (aType.EqualsLiteral("mouseover")) {
msg = eMouseEnterIntoWidget;
} else if (aType.EqualsLiteral("mouseout")) {
msg = eMouseExitFromWidget;
} else if (aType.EqualsLiteral("mousecancel")) {
msg = eMouseExitFromWidget;
exitFrom = WidgetMouseEvent::eTopLevel;
} else if (aType.EqualsLiteral("mouselongtap")) {
msg = eMouseLongTap;
} else if (aType.EqualsLiteral("contextmenu")) {
msg = eContextMenu;
contextMenuKey = (aButton == 0);
} else if (aType.EqualsLiteral("MozMouseHittest")) {
msg = eMouseHitTest;
} else {
return NS_ERROR_FAILURE;
}
if (aInputSourceArg == MouseEvent_Binding::MOZ_SOURCE_UNKNOWN) {
aInputSourceArg = MouseEvent_Binding::MOZ_SOURCE_MOUSE;
}
WidgetMouseEvent event(true, msg, widget,
aIsWidgetEventSynthesized
? WidgetMouseEvent::eSynthesized
: WidgetMouseEvent::eReal,
contextMenuKey ? WidgetMouseEvent::eContextMenuKey
: WidgetMouseEvent::eNormal);
event.pointerId = aIdentifier;
event.mModifiers = GetWidgetModifiers(aModifiers);
event.mButton = aButton;
event.mButtons = aButtons != nsIDOMWindowUtils::MOUSE_BUTTONS_NOT_SPECIFIED
? aButtons
: msg == eMouseUp ? 0 : GetButtonsFlagForButton(aButton);
event.mPressure = aPressure;
event.mInputSource = aInputSourceArg;
event.mClickCount = aClickCount;
event.mTime = PR_IntervalNow();
event.mFlags.mIsSynthesizedForTests = aIsDOMEventSynthesized;
event.mExitFrom = exitFrom;
nsPresContext* presContext = aPresShell->GetPresContext();
if (!presContext) return NS_ERROR_FAILURE;
event.mRefPoint = ToWidgetPoint(CSSPoint(aX, aY), offset, presContext);
event.mIgnoreRootScrollFrame = aIgnoreRootScrollFrame;
nsEventStatus status = nsEventStatus_eIgnore;
if (aToWindow) {
RefPtr<PresShell> presShell;
nsView* view =
GetViewToDispatchEvent(presContext, getter_AddRefs(presShell));
if (!presShell || !view) {
return NS_ERROR_FAILURE;
}
return presShell->HandleEvent(view->GetFrame(), &event, false, &status);
}
if (StaticPrefs::test_events_async_enabled()) {
status = widget->DispatchInputEvent(&event);
} else {
nsresult rv = widget->DispatchEvent(&event, status);
NS_ENSURE_SUCCESS(rv, rv);
}
if (aPreventDefault) {
*aPreventDefault = (status == nsEventStatus_eConsumeNoDefault);
}
return NS_OK;
}
/* static */
void nsContentUtils::FirePageHideEventForFrameLoaderSwap(
nsIDocShellTreeItem* aItem, EventTarget* aChromeEventHandler,
bool aOnlySystemGroup) {
MOZ_DIAGNOSTIC_ASSERT(aItem);
MOZ_DIAGNOSTIC_ASSERT(aChromeEventHandler);
RefPtr<Document> doc = aItem->GetDocument();
NS_ASSERTION(doc, "What happened here?");
doc->OnPageHide(true, aChromeEventHandler, aOnlySystemGroup);
int32_t childCount = 0;
aItem->GetInProcessChildCount(&childCount);
AutoTArray<nsCOMPtr<nsIDocShellTreeItem>, 8> kids;
kids.AppendElements(childCount);
for (int32_t i = 0; i < childCount; ++i) {
aItem->GetInProcessChildAt(i, getter_AddRefs(kids[i]));
}
for (uint32_t i = 0; i < kids.Length(); ++i) {
if (kids[i]) {
FirePageHideEventForFrameLoaderSwap(kids[i], aChromeEventHandler,
aOnlySystemGroup);
}
}
}
// The pageshow event is fired for a given document only if IsShowing() returns
// the same thing as aFireIfShowing. This gives us a way to fire pageshow only
// on documents that are still loading or only on documents that are already
// loaded.
/* static */
void nsContentUtils::FirePageShowEventForFrameLoaderSwap(
nsIDocShellTreeItem* aItem, EventTarget* aChromeEventHandler,
bool aFireIfShowing, bool aOnlySystemGroup) {
int32_t childCount = 0;
aItem->GetInProcessChildCount(&childCount);
AutoTArray<nsCOMPtr<nsIDocShellTreeItem>, 8> kids;
kids.AppendElements(childCount);
for (int32_t i = 0; i < childCount; ++i) {
aItem->GetInProcessChildAt(i, getter_AddRefs(kids[i]));
}
for (uint32_t i = 0; i < kids.Length(); ++i) {
if (kids[i]) {
FirePageShowEventForFrameLoaderSwap(kids[i], aChromeEventHandler,
aFireIfShowing, aOnlySystemGroup);
}
}
RefPtr<Document> doc = aItem->GetDocument();
NS_ASSERTION(doc, "What happened here?");
if (doc->IsShowing() == aFireIfShowing) {
doc->OnPageShow(true, aChromeEventHandler, aOnlySystemGroup);
}
}
/* static */
already_AddRefed<nsPIWindowRoot> nsContentUtils::GetWindowRoot(Document* aDoc) {
if (aDoc) {
if (nsPIDOMWindowOuter* win = aDoc->GetWindow()) {
return win->GetTopWindowRoot();
}
}
return nullptr;
}
/* static */
bool nsContentUtils::IsPreloadType(nsContentPolicyType aType) {
return (aType == nsIContentPolicy::TYPE_INTERNAL_SCRIPT_PRELOAD ||
aType == nsIContentPolicy::TYPE_INTERNAL_MODULE_PRELOAD ||
aType == nsIContentPolicy::TYPE_INTERNAL_IMAGE_PRELOAD ||
aType == nsIContentPolicy::TYPE_INTERNAL_STYLESHEET_PRELOAD);
}
/* static */
bool nsContentUtils::IsUpgradableDisplayType(nsContentPolicyType aType) {
MOZ_ASSERT(NS_IsMainThread());
return (aType == nsIContentPolicy::TYPE_IMAGE ||
aType == nsIContentPolicy::TYPE_MEDIA);
}
// static
ReferrerPolicy nsContentUtils::GetReferrerPolicyFromChannel(
nsIChannel* aChannel) {
nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(aChannel);
if (!httpChannel) {
return ReferrerPolicy::_empty;
}
nsresult rv;
nsAutoCString headerValue;
rv = httpChannel->GetResponseHeader(NS_LITERAL_CSTRING("referrer-policy"),
headerValue);
if (NS_FAILED(rv) || headerValue.IsEmpty()) {
return ReferrerPolicy::_empty;
}
return ReferrerInfo::ReferrerPolicyFromHeaderString(
NS_ConvertUTF8toUTF16(headerValue));
}
// static
bool nsContentUtils::IsNonSubresourceRequest(nsIChannel* aChannel) {
nsLoadFlags loadFlags = 0;
aChannel->GetLoadFlags(&loadFlags);
if (loadFlags & nsIChannel::LOAD_DOCUMENT_URI) {
return true;
}
nsCOMPtr<nsILoadInfo> loadInfo = aChannel->LoadInfo();
nsContentPolicyType type = loadInfo->InternalContentPolicyType();
return IsNonSubresourceInternalPolicyType(type);
}
// static
bool nsContentUtils::IsNonSubresourceInternalPolicyType(
nsContentPolicyType aType) {
return aType == nsIContentPolicy::TYPE_DOCUMENT ||
aType == nsIContentPolicy::TYPE_INTERNAL_IFRAME ||
aType == nsIContentPolicy::TYPE_INTERNAL_FRAME ||
aType == nsIContentPolicy::TYPE_INTERNAL_WORKER ||
aType == nsIContentPolicy::TYPE_INTERNAL_SHARED_WORKER;
}
// static public
bool nsContentUtils::IsThirdPartyWindowOrChannel(nsPIDOMWindowInner* aWindow,
nsIChannel* aChannel,
nsIURI* aURI) {
MOZ_ASSERT(!aWindow || !aChannel,
"A window and channel should not both be provided.");
ThirdPartyUtil* thirdPartyUtil = ThirdPartyUtil::GetInstance();
if (!thirdPartyUtil) {
return false;
}
// In the absence of a window or channel, we assume that we are first-party.
bool thirdParty = false;
if (aWindow) {
nsresult rv = thirdPartyUtil->IsThirdPartyWindow(aWindow->GetOuterWindow(),
aURI, &thirdParty);
if (NS_FAILED(rv)) {
// Ideally we would do something similar to the channel code path here,
// but existing code depends on this behaviour.
return false;
}
}
if (aChannel) {
// Note, we must call IsThirdPartyChannel() here and not just try to
// use nsILoadInfo.isThirdPartyContext. That nsILoadInfo property only
// indicates if the parent loading window is third party or not. We
// want to check the channel URI against the loading principal as well.
nsresult rv =
thirdPartyUtil->IsThirdPartyChannel(aChannel, nullptr, &thirdParty);
if (NS_FAILED(rv)) {
// Assume third-party in case of failure
thirdParty = true;
}
// We check isThirdPartyWindow to expand the list of domains that are
// considered first party (e.g., if facebook.com includes an iframe from
// fatratgames.com, all subsources included in that iframe are considered
// third-party with isThirdPartyChannel, even if they are not third-party
// w.r.t. facebook.com), and isThirdPartyChannel to prevent top-level
// navigations from being detected as third-party.
bool isThirdPartyWindow = true;
nsCOMPtr<nsIHttpChannelInternal> chan = do_QueryInterface(aChannel, &rv);
if (NS_SUCCEEDED(rv) && chan) {
nsCOMPtr<nsIURI> topWinURI;
rv = chan->GetTopWindowURI(getter_AddRefs(topWinURI));
if (NS_SUCCEEDED(rv) && topWinURI) {
rv = thirdPartyUtil->IsThirdPartyURI(aURI, topWinURI,
&isThirdPartyWindow);
if (NS_SUCCEEDED(rv)) {
thirdParty = thirdParty && isThirdPartyWindow;
}
}
}
}
return thirdParty;
}
// static public
bool nsContentUtils::IsTrackingResourceWindow(nsPIDOMWindowInner* aWindow) {
MOZ_ASSERT(aWindow);
Document* document = aWindow->GetExtantDoc();
if (!document) {
return false;
}
nsCOMPtr<nsIHttpChannel> httpChannel =
do_QueryInterface(document->GetChannel());
if (!httpChannel) {
return false;
}
return httpChannel->IsTrackingResource();
}
// static public
bool nsContentUtils::IsThirdPartyTrackingResourceWindow(
nsPIDOMWindowInner* aWindow) {
MOZ_ASSERT(aWindow);
Document* document = aWindow->GetExtantDoc();
if (!document) {
return false;
}
nsCOMPtr<nsIHttpChannel> httpChannel =
do_QueryInterface(document->GetChannel());
if (!httpChannel) {
return false;
}
return httpChannel->IsThirdPartyTrackingResource();
}
namespace {
// We put StringBuilder in the anonymous namespace to prevent anything outside
// this file from accidentally being linked against it.
class BulkAppender {
typedef typename nsAString::size_type size_type;
public:
explicit BulkAppender(BulkWriteHandle<char16_t>&& aHandle)
: mHandle(std::move(aHandle)), mPosition(0) {}
~BulkAppender() = default;
template <int N>
void AppendLiteral(const char16_t (&aStr)[N]) {
size_t len = N - 1;
MOZ_ASSERT(mPosition + len <= mHandle.Length());
memcpy(mHandle.Elements() + mPosition, aStr, len * sizeof(char16_t));
mPosition += len;
}
void Append(Span<const char16_t> aStr) {
size_t len = aStr.Length();
MOZ_ASSERT(mPosition + len <= mHandle.Length());
// Both mHandle.Elements() and aStr.Elements() are guaranteed
// to be non-null (by the string implementation and by Span,
// respectively), so not checking the pointers for null before
// memcpy does not lead to UB even if len was zero.
memcpy(mHandle.Elements() + mPosition, aStr.Elements(),
len * sizeof(char16_t));
mPosition += len;
}
void Append(Span<const char> aStr) {
size_t len = aStr.Length();
MOZ_ASSERT(mPosition + len <= mHandle.Length());
ConvertLatin1toUtf16(aStr, mHandle.AsSpan().From(mPosition));
mPosition += len;
}
void Finish() { mHandle.Finish(mPosition, false); }
private:
mozilla::BulkWriteHandle<char16_t> mHandle;
size_type mPosition;
};
class StringBuilder {
private:
// Try to keep the size of StringBuilder close to a jemalloc bucket size.
static const uint32_t STRING_BUFFER_UNITS = 1020;
class Unit {
public:
Unit() : mAtom(nullptr), mType(eUnknown), mLength(0) {
MOZ_COUNT_CTOR(StringBuilder::Unit);
}
~Unit() {
if (mType == eString || mType == eStringWithEncode) {
delete mString;
}
MOZ_COUNT_DTOR(StringBuilder::Unit);
}
enum Type {
eUnknown,
eAtom,
eString,
eStringWithEncode,
eLiteral,
eTextFragment,
eTextFragmentWithEncode,
};
union {
nsAtom* mAtom;
const char16_t* mLiteral;
nsAutoString* mString;
const nsTextFragment* mTextFragment;
};
Type mType;
uint32_t mLength;
};
public:
StringBuilder() : mLast(this), mLength(0) { MOZ_COUNT_CTOR(StringBuilder); }
~StringBuilder() { MOZ_COUNT_DTOR(StringBuilder); }
void Append(nsAtom* aAtom) {
Unit* u = AddUnit();
u->mAtom = aAtom;
u->mType = Unit::eAtom;
uint32_t len = aAtom->GetLength();
u->mLength = len;
mLength += len;
}
template <int N>
void Append(const char16_t (&aLiteral)[N]) {
Unit* u = AddUnit();
u->mLiteral = aLiteral;
u->mType = Unit::eLiteral;
uint32_t len = N - 1;
u->mLength = len;
mLength += len;
}
void Append(const nsAString& aString) {
Unit* u = AddUnit();
u->mString = new nsAutoString(aString);
u->mType = Unit::eString;
uint32_t len = aString.Length();
u->mLength = len;
mLength += len;
}
void Append(nsAutoString* aString) {
Unit* u = AddUnit();
u->mString = aString;
u->mType = Unit::eString;
uint32_t len = aString->Length();
u->mLength = len;
mLength += len;
}
void AppendWithAttrEncode(nsAutoString* aString, uint32_t aLen) {
Unit* u = AddUnit();
u->mString = aString;
u->mType = Unit::eStringWithEncode;
u->mLength = aLen;
mLength += aLen;
}
void Append(const nsTextFragment* aTextFragment) {
Unit* u = AddUnit();
u->mTextFragment = aTextFragment;
u->mType = Unit::eTextFragment;
uint32_t len = aTextFragment->GetLength();
u->mLength = len;
mLength += len;
}
void AppendWithEncode(const nsTextFragment* aTextFragment, uint32_t aLen) {
Unit* u = AddUnit();
u->mTextFragment = aTextFragment;
u->mType = Unit::eTextFragmentWithEncode;
u->mLength = aLen;
mLength += aLen;
}
bool ToString(nsAString& aOut) {
if (!mLength.isValid()) {
return false;
}
nsresult rv;
BulkAppender appender(aOut.BulkWrite(mLength.value(), 0, true, rv));
if (NS_FAILED(rv)) {
return false;
}
for (StringBuilder* current = this; current; current = current->mNext) {
uint32_t len = current->mUnits.Length();
for (uint32_t i = 0; i < len; ++i) {
Unit& u = current->mUnits[i];
switch (u.mType) {
case Unit::eAtom:
appender.Append(*(u.mAtom));
break;
case Unit::eString:
appender.Append(*(u.mString));
break;
case Unit::eStringWithEncode:
EncodeAttrString(*(u.mString), appender);
break;
case Unit::eLiteral:
appender.Append(MakeSpan(u.mLiteral, u.mLength));
break;
case Unit::eTextFragment:
if (u.mTextFragment->Is2b()) {
appender.Append(MakeSpan(u.mTextFragment->Get2b(),
u.mTextFragment->GetLength()));
} else {
appender.Append(MakeSpan(u.mTextFragment->Get1b(),
u.mTextFragment->GetLength()));
}
break;
case Unit::eTextFragmentWithEncode:
if (u.mTextFragment->Is2b()) {
EncodeTextFragment(MakeSpan(u.mTextFragment->Get2b(),
u.mTextFragment->GetLength()),
appender);
} else {
EncodeTextFragment(MakeSpan(u.mTextFragment->Get1b(),
u.mTextFragment->GetLength()),
appender);
}
break;
default:
MOZ_CRASH("Unknown unit type?");
}
}
}
appender.Finish();
return true;
}
private:
Unit* AddUnit() {
if (mLast->mUnits.Length() == STRING_BUFFER_UNITS) {
new StringBuilder(this);
}
return mLast->mUnits.AppendElement();
}
explicit StringBuilder(StringBuilder* aFirst) : mLast(nullptr), mLength(0) {
MOZ_COUNT_CTOR(StringBuilder);
aFirst->mLast->mNext = this;
aFirst->mLast = this;
}
void EncodeAttrString(Span<const char16_t> aStr, BulkAppender& aAppender) {
size_t flushedUntil = 0;
size_t currentPosition = 0;
for (char16_t c : aStr) {
switch (c) {
case '"':
aAppender.Append(aStr.FromTo(flushedUntil, currentPosition));
aAppender.AppendLiteral(u"&quot;");
flushedUntil = currentPosition + 1;
break;
case '&':
aAppender.Append(aStr.FromTo(flushedUntil, currentPosition));
aAppender.AppendLiteral(u"&amp;");
flushedUntil = currentPosition + 1;
break;
case 0x00A0:
aAppender.Append(aStr.FromTo(flushedUntil, currentPosition));
aAppender.AppendLiteral(u"&nbsp;");
flushedUntil = currentPosition + 1;
break;
default:
break;
}
currentPosition++;
}
if (currentPosition > flushedUntil) {
aAppender.Append(aStr.FromTo(flushedUntil, currentPosition));
}
}
template <class T>
void EncodeTextFragment(Span<const T> aStr, BulkAppender& aAppender) {
size_t flushedUntil = 0;
size_t currentPosition = 0;
for (T c : aStr) {
switch (c) {
case '<':
aAppender.Append(aStr.FromTo(flushedUntil, currentPosition));
aAppender.AppendLiteral(u"&lt;");
flushedUntil = currentPosition + 1;
break;
case '>':
aAppender.Append(aStr.FromTo(flushedUntil, currentPosition));
aAppender.AppendLiteral(u"&gt;");
flushedUntil = currentPosition + 1;
break;
case '&':
aAppender.Append(aStr.FromTo(flushedUntil, currentPosition));
aAppender.AppendLiteral(u"&amp;");
flushedUntil = currentPosition + 1;
break;
case T(0xA0):
aAppender.Append(aStr.FromTo(flushedUntil, currentPosition));
aAppender.AppendLiteral(u"&nbsp;");
flushedUntil = currentPosition + 1;
break;
default:
break;
}
currentPosition++;
}
if (currentPosition > flushedUntil) {
aAppender.Append(aStr.FromTo(flushedUntil, currentPosition));
}
}
AutoTArray<Unit, STRING_BUFFER_UNITS> mUnits;
nsAutoPtr<StringBuilder> mNext;
StringBuilder* mLast;
// mLength is used only in the first StringBuilder object in the linked list.
CheckedInt<uint32_t> mLength;
};
} // namespace
static void AppendEncodedCharacters(const nsTextFragment* aText,
StringBuilder& aBuilder) {
uint32_t extraSpaceNeeded = 0;
uint32_t len = aText->GetLength();
if (aText->Is2b()) {
const char16_t* data = aText->Get2b();
for (uint32_t i = 0; i < len; ++i) {
const char16_t c = data[i];
switch (c) {
case '<':
extraSpaceNeeded += ArrayLength("&lt;") - 2;
break;
case '>':
extraSpaceNeeded += ArrayLength("&gt;") - 2;
break;
case '&':
extraSpaceNeeded += ArrayLength("&amp;") - 2;
break;
case 0x00A0:
extraSpaceNeeded += ArrayLength("&nbsp;") - 2;
break;
default:
break;
}
}
} else {
const char* data = aText->Get1b();
for (uint32_t i = 0; i < len; ++i) {
const unsigned char c = data[i];
switch (c) {
case '<':
extraSpaceNeeded += ArrayLength("&lt;") - 2;
break;
case '>':
extraSpaceNeeded += ArrayLength("&gt;") - 2;
break;
case '&':
extraSpaceNeeded += ArrayLength("&amp;") - 2;
break;
case 0x00A0:
extraSpaceNeeded += ArrayLength("&nbsp;") - 2;
break;
default:
break;
}
}
}
if (extraSpaceNeeded) {
aBuilder.AppendWithEncode(aText, len + extraSpaceNeeded);
} else {
aBuilder.Append(aText);
}
}
static void AppendEncodedAttributeValue(nsAutoString* aValue,
StringBuilder& aBuilder) {
const char16_t* c = aValue->BeginReading();
const char16_t* end = aValue->EndReading();
uint32_t extraSpaceNeeded = 0;
while (c < end) {
switch (*c) {
case '"':
extraSpaceNeeded += ArrayLength("&quot;") - 2;
break;
case '&':
extraSpaceNeeded += ArrayLength("&amp;") - 2;
break;
case 0x00A0:
extraSpaceNeeded += ArrayLength("&nbsp;") - 2;
break;
default:
break;
}
++c;
}
if (extraSpaceNeeded) {
aBuilder.AppendWithAttrEncode(aValue, aValue->Length() + extraSpaceNeeded);
} else {
aBuilder.Append(aValue);
}
}
static void StartElement(Element* aContent, StringBuilder& aBuilder) {
nsAtom* localName = aContent->NodeInfo()->NameAtom();
int32_t tagNS = aContent->GetNameSpaceID();
aBuilder.Append(u"<");
if (aContent->IsHTMLElement() || aContent->IsSVGElement() ||
aContent->IsMathMLElement()) {
aBuilder.Append(localName);
} else {
aBuilder.Append(aContent->NodeName());
}
CustomElementData* ceData = aContent->GetCustomElementData();
if (ceData) {
nsAtom* isAttr = ceData->GetIs(aContent);
if (isAttr && !aContent->HasAttr(kNameSpaceID_None, nsGkAtoms::is)) {
aBuilder.Append(uR"( is=")");
aBuilder.Append(nsDependentAtomString(isAttr));
aBuilder.Append(uR"(")");
}
}
int32_t count = aContent->GetAttrCount();
for (int32_t i = 0; i < count; i++) {
const nsAttrName* name = aContent->GetAttrNameAt(i);
int32_t attNs = name->NamespaceID();
nsAtom* attName = name->LocalName();
// Filter out any attribute starting with [-|_]moz
nsDependentAtomString attrNameStr(attName);
if (StringBeginsWith(attrNameStr, NS_LITERAL_STRING("_moz")) ||
StringBeginsWith(attrNameStr, NS_LITERAL_STRING("-moz"))) {
continue;
}
auto* attValue = new nsAutoString();
aContent->GetAttr(attNs, attName, *attValue);
// Filter out special case of <br type="_moz*"> used by the editor.
// Bug 16988. Yuck.
if (localName == nsGkAtoms::br && tagNS == kNameSpaceID_XHTML &&
attName == nsGkAtoms::type && attNs == kNameSpaceID_None &&
StringBeginsWith(*attValue, NS_LITERAL_STRING("_moz"))) {
delete attValue;
continue;
}
aBuilder.Append(u" ");
if (MOZ_LIKELY(attNs == kNameSpaceID_None) ||
(attNs == kNameSpaceID_XMLNS && attName == nsGkAtoms::xmlns)) {
// Nothing else required
} else if (attNs == kNameSpaceID_XML) {
aBuilder.Append(u"xml:");
} else if (attNs == kNameSpaceID_XMLNS) {
aBuilder.Append(u"xmlns:");
} else if (attNs == kNameSpaceID_XLink) {
aBuilder.Append(u"xlink:");
} else {
nsAtom* prefix = name->GetPrefix();
if (prefix) {
aBuilder.Append(prefix);
aBuilder.Append(u":");
}
}
aBuilder.Append(attName);
aBuilder.Append(uR"(=")");
AppendEncodedAttributeValue(attValue, aBuilder);
aBuilder.Append(uR"(")");
}
aBuilder.Append(u">");
/*
// Per HTML spec we should append one \n if the first child of
// pre/textarea/listing is a textnode and starts with a \n.
// But because browsers haven't traditionally had that behavior,
// we're not changing our behavior either - yet.
if (aContent->IsHTMLElement()) {
if (localName == nsGkAtoms::pre || localName == nsGkAtoms::textarea ||
localName == nsGkAtoms::listing) {
nsIContent* fc = aContent->GetFirstChild();
if (fc &&
(fc->NodeType() == nsINode::TEXT_NODE ||
fc->NodeType() == nsINode::CDATA_SECTION_NODE)) {
const nsTextFragment* text = fc->GetText();
if (text && text->GetLength() && text->CharAt(0) == char16_t('\n')) {
aBuilder.Append("\n");
}
}
}
}*/
}
static inline bool ShouldEscape(nsIContent* aParent) {
if (!aParent || !aParent->IsHTMLElement()) {
return true;
}
static const nsAtom* nonEscapingElements[] = {
nsGkAtoms::style, nsGkAtoms::script, nsGkAtoms::xmp, nsGkAtoms::iframe,
nsGkAtoms::noembed, nsGkAtoms::noframes, nsGkAtoms::plaintext,
// Per the current spec noscript should be escaped in case
// scripts are disabled or if document doesn't have
// browsing context. However the latter seems to be a spec bug
// and Gecko hasn't traditionally done the former.
nsGkAtoms::noscript};
static mozilla::BloomFilter<12, nsAtom> sFilter;
static bool sInitialized = false;
if (!sInitialized) {
sInitialized = true;
for (auto& nonEscapingElement : nonEscapingElements) {
sFilter.add(nonEscapingElement);
}
}
nsAtom* tag = aParent->NodeInfo()->NameAtom();
if (sFilter.mightContain(tag)) {
for (auto& nonEscapingElement : nonEscapingElements) {
if (tag == nonEscapingElement) {
return false;
}
}
}
return true;
}
static inline bool IsVoidTag(Element* aElement) {
if (!aElement->IsHTMLElement()) {
return false;
}
return FragmentOrElement::IsHTMLVoid(aElement->NodeInfo()->NameAtom());
}
bool nsContentUtils::SerializeNodeToMarkup(nsINode* aRoot,
bool aDescendentsOnly,
nsAString& aOut) {
// If you pass in a DOCUMENT_NODE, you must pass aDescendentsOnly as true
MOZ_ASSERT(aDescendentsOnly || aRoot->NodeType() != nsINode::DOCUMENT_NODE);
nsINode* current = aDescendentsOnly
? nsNodeUtils::GetFirstChildOfTemplateOrNode(aRoot)
: aRoot;
if (!current) {
return true;
}
StringBuilder builder;
nsIContent* next;
while (true) {
bool isVoid = false;
switch (current->NodeType()) {
case nsINode::ELEMENT_NODE: {
Element* elem = current->AsElement();
StartElement(elem, builder);
isVoid = IsVoidTag(elem);
if (!isVoid &&
(next = nsNodeUtils::GetFirstChildOfTemplateOrNode(current))) {
current = next;
continue;
}
break;
}
case nsINode::TEXT_NODE:
case nsINode::CDATA_SECTION_NODE: {
const nsTextFragment* text = &current->AsText()->TextFragment();
nsIContent* parent = current->GetParent();
if (ShouldEscape(parent)) {
AppendEncodedCharacters(text, builder);
} else {
builder.Append(text);
}
break;
}
case nsINode::COMMENT_NODE: {
builder.Append(u"<!--");
builder.Append(static_cast<nsIContent*>(current)->GetText());
builder.Append(u"-->");
break;
}
case nsINode::DOCUMENT_TYPE_NODE: {
builder.Append(u"<!DOCTYPE ");
builder.Append(current->NodeName());
builder.Append(u">");
break;
}
case nsINode::PROCESSING_INSTRUCTION_NODE: {
builder.Append(u"<?");
builder.Append(current->NodeName());
builder.Append(u" ");
builder.Append(static_cast<nsIContent*>(current)->GetText());
builder.Append(u">");
break;
}
}
while (true) {
if (!isVoid && current->NodeType() == nsINode::ELEMENT_NODE) {
builder.Append(u"</");
nsIContent* elem = static_cast<nsIContent*>(current);
if (elem->IsHTMLElement() || elem->IsSVGElement() ||
elem->IsMathMLElement()) {
builder.Append(elem->NodeInfo()->NameAtom());
} else {
builder.Append(current->NodeName());
}
builder.Append(u">");
}
isVoid = false;
if (current == aRoot) {
return builder.ToString(aOut);
}
if ((next = current->GetNextSibling())) {
current = next;
break;
}
current = current->GetParentNode();
// Handle template element. If the parent is a template's content,
// then adjust the parent to be the template element.
if (current != aRoot &&
current->NodeType() == nsINode::DOCUMENT_FRAGMENT_NODE) {
DocumentFragment* frag = static_cast<DocumentFragment*>(current);
nsIContent* fragHost = frag->GetHost();
if (fragHost && nsNodeUtils::IsTemplateElement(fragHost)) {
current = fragHost;
}
}
if (aDescendentsOnly && current == aRoot) {
return builder.ToString(aOut);
}
}
}
}
bool nsContentUtils::IsSpecificAboutPage(JSObject* aGlobal, const char* aUri) {
// aUri must start with about: or this isn't the right function to be using.
MOZ_ASSERT(strncmp(aUri, "about:", 6) == 0);
// Make sure the global is a window
MOZ_DIAGNOSTIC_ASSERT(JS_IsGlobalObject(aGlobal));
nsGlobalWindowInner* win = xpc::WindowOrNull(aGlobal);
if (!win) {
return false;
}
nsCOMPtr<nsIPrincipal> principal = win->GetPrincipal();
NS_ENSURE_TRUE(principal, false);
nsCOMPtr<nsIURI> uri;
principal->GetURI(getter_AddRefs(uri));
if (!uri) {
return false;
}
// First check the scheme to avoid getting long specs in the common case.
if (!uri->SchemeIs("about")) {
return false;
}
// Now check the spec itself
nsAutoCString spec;
uri->GetSpecIgnoringRef(spec);
return spec.EqualsASCII(aUri);
}
/* static */
void nsContentUtils::SetScrollbarsVisibility(nsIDocShell* aDocShell,
bool aVisible) {
nsCOMPtr<nsIScrollable> scroller = do_QueryInterface(aDocShell);
if (scroller) {
int32_t prefValue;
if (aVisible) {
prefValue = nsIScrollable::Scrollbar_Auto;
} else {
prefValue = nsIScrollable::Scrollbar_Never;
}
scroller->SetDefaultScrollbarPreferences(nsIScrollable::ScrollOrientation_Y,
prefValue);
scroller->SetDefaultScrollbarPreferences(nsIScrollable::ScrollOrientation_X,
prefValue);
}
}
/* static */
void nsContentUtils::GetPresentationURL(nsIDocShell* aDocShell,
nsAString& aPresentationUrl) {
MOZ_ASSERT(aDocShell);
// Simulate receiver context for web platform test
if (StaticPrefs::dom_presentation_testing_simulate_receiver()) {
RefPtr<Document> doc;
nsCOMPtr<nsPIDOMWindowOuter> docShellWin =
do_QueryInterface(aDocShell->GetScriptGlobalObject());
if (docShellWin) {
doc = docShellWin->GetExtantDoc();
}
if (NS_WARN_IF(!doc)) {
return;
}
nsCOMPtr<nsIURI> uri = doc->GetDocumentURI();
if (NS_WARN_IF(!uri)) {
return;
}
nsAutoCString uriStr;
uri->GetSpec(uriStr);
aPresentationUrl = NS_ConvertUTF8toUTF16(uriStr);
return;
}
if (XRE_IsContentProcess()) {
nsCOMPtr<nsIDocShellTreeItem> sameTypeRoot;
aDocShell->GetInProcessSameTypeRootTreeItem(getter_AddRefs(sameTypeRoot));
nsCOMPtr<nsIDocShellTreeItem> root;
aDocShell->GetInProcessRootTreeItem(getter_AddRefs(root));
if (sameTypeRoot.get() == root.get()) {
// presentation URL is stored in BrowserChild for the top most
// <iframe mozbrowser> in content process.
BrowserChild* browserChild = BrowserChild::GetFrom(aDocShell);
if (browserChild) {
aPresentationUrl = browserChild->PresentationURL();
}
return;
}
}
nsCOMPtr<nsILoadContext> loadContext(do_QueryInterface(aDocShell));
RefPtr<Element> topFrameElt;
loadContext->GetTopFrameElement(getter_AddRefs(topFrameElt));
if (!topFrameElt) {
return;
}
topFrameElt->GetAttribute(NS_LITERAL_STRING("mozpresentation"),
aPresentationUrl);
}
/* static */
nsIDocShell* nsContentUtils::GetDocShellForEventTarget(EventTarget* aTarget) {
nsCOMPtr<nsPIDOMWindowInner> innerWindow;
if (nsCOMPtr<nsINode> node = do_QueryInterface(aTarget)) {
bool ignore;
innerWindow =
do_QueryInterface(node->OwnerDoc()->GetScriptHandlingObject(ignore));
} else if ((innerWindow = do_QueryInterface(aTarget))) {
// Nothing else to do
} else {
nsCOMPtr<DOMEventTargetHelper> helper = do_QueryInterface(aTarget);
if (helper) {
innerWindow = helper->GetOwner();
}
}
if (innerWindow) {
return innerWindow->GetDocShell();
}
return nullptr;
}
/*
* Note: this function only relates to figuring out HTTPS state, which is an
* input to the Secure Context algorithm. We are not actually implementing any
* part of the Secure Context algorithm itself here.
*
* This is a bit of a hack. Ideally we'd propagate HTTPS state through
* nsIChannel as described in the Fetch and HTML specs, but making channels
* know about whether they should inherit HTTPS state, propagating information
* about who the channel's "client" is, exposing GetHttpsState API on channels
* and modifying the various cache implementations to store and retrieve HTTPS
* state involves a huge amount of code (see bug 1220687). We avoid that for
* now using this function.
*
* This function takes advantage of the observation that we can return true if
* nsIContentSecurityManager::IsOriginPotentiallyTrustworthy returns true for
* the document's origin (e.g. the origin has a scheme of 'https' or host
* 'localhost' etc.). Since we generally propagate a creator document's origin
* onto data:, blob:, etc. documents, this works for them too.
*
* The scenario where this observation breaks down is sandboxing without the
* 'allow-same-origin' flag, since in this case a document is given a unique
* origin (IsOriginPotentiallyTrustworthy would return false). We handle that
* by using the origin that the document would have had had it not been
* sandboxed.
*
* DEFICIENCIES: Note that this function uses nsIScriptSecurityManager's
* getChannelResultPrincipalIfNotSandboxed, and that method's ignoring of
* sandboxing is limited to the immediate sandbox. In the case that aDocument
* should inherit its origin (e.g. data: URI) but its parent has ended up
* with a unique origin due to sandboxing further up the parent chain we may
* end up returning false when we would ideally return true (since we will
* examine the parent's origin for 'https' and not finding it.) This means
* that we may restrict the privileges of some pages unnecessarily in this
* edge case.
*/
/* static */
bool nsContentUtils::HttpsStateIsModern(Document* aDocument) {
if (!aDocument) {
return false;
}
nsCOMPtr<nsIPrincipal> principal = aDocument->NodePrincipal();
if (principal->IsSystemPrincipal()) {
return true;
}
// If aDocument is sandboxed, try and get the principal that it would have
// been given had it not been sandboxed:
if (principal->GetIsNullPrincipal() &&
(aDocument->GetSandboxFlags() & SANDBOXED_ORIGIN)) {
nsIChannel* channel = aDocument->GetChannel();
if (channel) {
nsCOMPtr<nsIScriptSecurityManager> ssm =
nsContentUtils::GetSecurityManager();
nsresult rv = ssm->GetChannelResultPrincipalIfNotSandboxed(
channel, getter_AddRefs(principal));
if (NS_FAILED(rv)) {
return false;
}
if (principal->IsSystemPrincipal()) {
// If a document with the system principal is sandboxing a subdocument
// that would normally inherit the embedding element's principal (e.g.
// a srcdoc document) then the embedding document does not trust the
// content that is written to the embedded document. Unlike when the
// embedding document is https, in this case we have no indication as
// to whether the embedded document's contents are delivered securely
// or not, and the sandboxing would possibly indicate that they were
// not. To play it safe we return false here. (See bug 1162772
// comment 73-80.)
return false;
}
}
}
if (principal->GetIsNullPrincipal()) {
return false;
}
MOZ_ASSERT(principal->GetIsContentPrincipal());
nsCOMPtr<nsIContentSecurityManager> csm =
do_GetService(NS_CONTENTSECURITYMANAGER_CONTRACTID);
NS_WARNING_ASSERTION(csm, "csm is null");
if (csm) {
bool isTrustworthyOrigin = false;
csm->IsOriginPotentiallyTrustworthy(principal, &isTrustworthyOrigin);
if (isTrustworthyOrigin) {
return true;
}
}
return false;
}
/* static */
void nsContentUtils::TryToUpgradeElement(Element* aElement) {
NodeInfo* nodeInfo = aElement->NodeInfo();
RefPtr<nsAtom> typeAtom =
aElement->GetCustomElementData()->GetCustomElementType();
MOZ_ASSERT(nodeInfo->NameAtom()->Equals(nodeInfo->LocalName()));
CustomElementDefinition* definition =
nsContentUtils::LookupCustomElementDefinition(
nodeInfo->GetDocument(), nodeInfo->NameAtom(),
nodeInfo->NamespaceID(), typeAtom);
if (definition) {
nsContentUtils::EnqueueUpgradeReaction(aElement, definition);
} else {
// Add an unresolved custom element that is a candidate for upgrade when a
// custom element is connected to the document.
nsContentUtils::RegisterUnresolvedElement(aElement, typeAtom);
}
}
MOZ_CAN_RUN_SCRIPT
static void DoCustomElementCreate(Element** aElement, JSContext* aCx,
Document* aDoc, NodeInfo* aNodeInfo,
CustomElementConstructor* aConstructor,
ErrorResult& aRv) {
JS::Rooted<JS::Value> constructResult(aCx);
aConstructor->Construct(&constructResult, aRv, "Custom Element Create",
CallbackFunction::eRethrowExceptions);
if (aRv.Failed()) {
return;
}
RefPtr<Element> element;
// constructResult is an ObjectValue because construction with a callback
// always forms the return value from a JSObject.
UNWRAP_OBJECT(Element, &constructResult, element);
if (aNodeInfo->NamespaceEquals(kNameSpaceID_XHTML)) {
if (!element || !element->IsHTMLElement()) {
aRv.ThrowTypeError<MSG_DOES_NOT_IMPLEMENT_INTERFACE>(
NS_LITERAL_STRING("\"this\""), NS_LITERAL_STRING("HTMLElement"));
return;
}
} else {
if (!element || !element->IsXULElement()) {
aRv.ThrowTypeError<MSG_DOES_NOT_IMPLEMENT_INTERFACE>(
NS_LITERAL_STRING("\"this\""), NS_LITERAL_STRING("XULElement"));
return;
}
}
nsAtom* localName = aNodeInfo->NameAtom();
if (aDoc != element->OwnerDoc() || element->GetParentNode() ||
element->HasChildren() || element->GetAttrCount() ||
element->NodeInfo()->NameAtom() != localName) {
aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
return;
}
element.forget(aElement);
}
/* static */
nsresult nsContentUtils::NewXULOrHTMLElement(
Element** aResult, mozilla::dom::NodeInfo* aNodeInfo,
FromParser aFromParser, nsAtom* aIsAtom,
mozilla::dom::CustomElementDefinition* aDefinition) {
RefPtr<mozilla::dom::NodeInfo> nodeInfo = aNodeInfo;
MOZ_ASSERT(nodeInfo->NamespaceEquals(kNameSpaceID_XHTML) ||
nodeInfo->NamespaceEquals(kNameSpaceID_XUL),
"Can only create XUL or XHTML elements.");
nsAtom* name = nodeInfo->NameAtom();
int32_t tag = eHTMLTag_unknown;
bool isCustomElementName = false;
if (nodeInfo->NamespaceEquals(kNameSpaceID_XHTML)) {
tag = nsHTMLTags::CaseSensitiveAtomTagToId(name);
isCustomElementName =
(tag == eHTMLTag_userdefined &&
nsContentUtils::IsCustomElementName(name, kNameSpaceID_XHTML));
} else { // kNameSpaceID_XUL
if (aIsAtom) {
// Make sure the customized built-in element to be constructed confirms
// to our naming requirement, i.e. [is] must be a dashed name and
// the tag name must not.
// if so, set isCustomElementName to false to kick off all the logics
// that pick up aIsAtom.
if (nsContentUtils::IsNameWithDash(aIsAtom) &&
!nsContentUtils::IsNameWithDash(name)) {
isCustomElementName = false;
} else {
isCustomElementName =
nsContentUtils::IsCustomElementName(name, kNameSpaceID_XUL);
}
} else {
isCustomElementName =
nsContentUtils::IsCustomElementName(name, kNameSpaceID_XUL);
}
}
nsAtom* tagAtom = nodeInfo->NameAtom();
nsAtom* typeAtom = nullptr;
bool isCustomElement = isCustomElementName || aIsAtom;
if (isCustomElement) {
typeAtom = isCustomElementName ? tagAtom : aIsAtom;
}
MOZ_ASSERT_IF(aDefinition, isCustomElement);
// https://dom.spec.whatwg.org/#concept-create-element
// We only handle the "synchronous custom elements flag is set" now.
// For the unset case (e.g. cloning a node), see bug 1319342 for that.
// Step 4.
RefPtr<CustomElementDefinition> definition = aDefinition;
if (isCustomElement && !definition) {
MOZ_ASSERT(nodeInfo->NameAtom()->Equals(nodeInfo->LocalName()));
definition = nsContentUtils::LookupCustomElementDefinition(
nodeInfo->GetDocument(), nodeInfo->NameAtom(), nodeInfo->NamespaceID(),
typeAtom);
}
// It might be a problem that parser synchronously calls constructor, so filed
// bug 1378079 to figure out what we should do for parser case.
if (definition) {
/*
* Synchronous custom elements flag is determined by 3 places in spec,
* 1) create an element for a token, the flag is determined by
* "will execute script" which is not originally created
* for the HTML fragment parsing algorithm.
* 2) createElement and createElementNS, the flag is the same as
* NOT_FROM_PARSER.
* 3) clone a node, our implementation will not go into this function.
* For the unset case which is non-synchronous only applied for
* inner/outerHTML.
*/
bool synchronousCustomElements = aFromParser != dom::FROM_PARSER_FRAGMENT ||
aFromParser == dom::NOT_FROM_PARSER;
// Per discussion in https://github.com/w3c/webcomponents/issues/635,
// use entry global in those places that are called from JS APIs and use the
// node document's global object if it is called from parser.
nsIGlobalObject* global;
if (aFromParser == dom::NOT_FROM_PARSER) {
global = GetEntryGlobal();
// Documents created from the PrototypeDocumentSink always use
// NOT_FROM_PARSER for non-XUL elements. We can get the global from the
// document in that case.
if (!global) {
Document* doc = nodeInfo->GetDocument();
if (doc && doc->LoadedFromPrototype()) {
global = doc->GetScopeObject();
}
}
} else {
global = nodeInfo->GetDocument()->GetScopeObject();
}
if (!global) {
// In browser chrome code, one may have access to a document which doesn't
// have scope object anymore.
return NS_ERROR_FAILURE;
}
AutoEntryScript aes(global, "create custom elements");
JSContext* cx = aes.cx();
ErrorResult rv;
// Step 5.
if (definition->IsCustomBuiltIn()) {
// SetupCustomElement() should be called with an element that don't have
// CustomElementData setup, if not we will hit the assertion in
// SetCustomElementData().
// Built-in element
if (nodeInfo->NamespaceEquals(kNameSpaceID_XHTML)) {
*aResult =
CreateHTMLElement(tag, nodeInfo.forget(), aFromParser).take();
} else {
NS_IF_ADDREF(*aResult = nsXULElement::Construct(nodeInfo.forget()));
}
(*aResult)->SetCustomElementData(new CustomElementData(typeAtom));
if (synchronousCustomElements) {
CustomElementRegistry::Upgrade(*aResult, definition, rv);
if (rv.MaybeSetPendingException(cx)) {
aes.ReportException();
}
} else {
nsContentUtils::EnqueueUpgradeReaction(*aResult, definition);
}
return NS_OK;
}
// Step 6.1.
if (synchronousCustomElements) {
definition->mPrefixStack.AppendElement(nodeInfo->GetPrefixAtom());
RefPtr<Document> doc = nodeInfo->GetDocument();
DoCustomElementCreate(aResult, cx, doc, nodeInfo,
MOZ_KnownLive(definition->mConstructor), rv);
if (rv.MaybeSetPendingException(cx)) {
if (nodeInfo->NamespaceEquals(kNameSpaceID_XHTML)) {
NS_IF_ADDREF(*aResult = NS_NewHTMLUnknownElement(nodeInfo.forget(),
aFromParser));
} else {
NS_IF_ADDREF(*aResult = nsXULElement::Construct(nodeInfo.forget()));
}
(*aResult)->SetDefined(false);
}
definition->mPrefixStack.RemoveLastElement();
return NS_OK;
}
// Step 6.2.
if (nodeInfo->NamespaceEquals(kNameSpaceID_XHTML)) {
NS_IF_ADDREF(*aResult =
NS_NewHTMLElement(nodeInfo.forget(), aFromParser));
} else {
NS_IF_ADDREF(*aResult = nsXULElement::Construct(nodeInfo.forget()));
}
(*aResult)->SetCustomElementData(new CustomElementData(definition->mType));
nsContentUtils::EnqueueUpgradeReaction(*aResult, definition);
return NS_OK;
}
if (nodeInfo->NamespaceEquals(kNameSpaceID_XHTML)) {
// Per the Custom Element specification, unknown tags that are valid custom
// element names should be HTMLElement instead of HTMLUnknownElement.
if (isCustomElementName) {
NS_IF_ADDREF(*aResult =
NS_NewHTMLElement(nodeInfo.forget(), aFromParser));
} else {
*aResult = CreateHTMLElement(tag, nodeInfo.forget(), aFromParser).take();
}
} else {
NS_IF_ADDREF(*aResult = nsXULElement::Construct(nodeInfo.forget()));
}
if (!*aResult) {
return NS_ERROR_OUT_OF_MEMORY;
}
if (isCustomElement) {
(*aResult)->SetCustomElementData(new CustomElementData(typeAtom));
nsContentUtils::RegisterCallbackUpgradeElement(*aResult, typeAtom);
}
return NS_OK;
}
CustomElementRegistry* nsContentUtils::GetCustomElementRegistry(
Document* aDoc) {
MOZ_ASSERT(aDoc);
if (!aDoc->GetDocShell()) {
return nullptr;
}
nsPIDOMWindowInner* window = aDoc->GetInnerWindow();
if (!window) {
return nullptr;
}
return window->CustomElements();
}
/* static */
CustomElementDefinition* nsContentUtils::LookupCustomElementDefinition(
Document* aDoc, nsAtom* aNameAtom, uint32_t aNameSpaceID,
nsAtom* aTypeAtom) {
if (aNameSpaceID != kNameSpaceID_XUL && aNameSpaceID != kNameSpaceID_XHTML) {
return nullptr;
}
RefPtr<CustomElementRegistry> registry = GetCustomElementRegistry(aDoc);
if (!registry) {
return nullptr;
}
return registry->LookupCustomElementDefinition(aNameAtom, aNameSpaceID,
aTypeAtom);
}
/* static */
void nsContentUtils::RegisterCallbackUpgradeElement(Element* aElement,
nsAtom* aTypeName) {
MOZ_ASSERT(aElement);
Document* doc = aElement->OwnerDoc();
CustomElementRegistry* registry = GetCustomElementRegistry(doc);
if (registry) {
registry->RegisterCallbackUpgradeElement(aElement, aTypeName);
}
}
/* static */
void nsContentUtils::RegisterUnresolvedElement(Element* aElement,
nsAtom* aTypeName) {
MOZ_ASSERT(aElement);
Document* doc = aElement->OwnerDoc();
CustomElementRegistry* registry = GetCustomElementRegistry(doc);
if (registry) {
registry->RegisterUnresolvedElement(aElement, aTypeName);
}
}
/* static */
void nsContentUtils::UnregisterUnresolvedElement(Element* aElement) {
MOZ_ASSERT(aElement);
nsAtom* typeAtom = aElement->GetCustomElementData()->GetCustomElementType();
Document* doc = aElement->OwnerDoc();
CustomElementRegistry* registry = GetCustomElementRegistry(doc);
if (registry) {
registry->UnregisterUnresolvedElement(aElement, typeAtom);
}
}
/* static */
void nsContentUtils::EnqueueUpgradeReaction(
Element* aElement, CustomElementDefinition* aDefinition) {
MOZ_ASSERT(aElement);
Document* doc = aElement->OwnerDoc();
// No DocGroup means no custom element reactions stack.
if (!doc->GetDocGroup()) {
return;
}
CustomElementReactionsStack* stack =
doc->GetDocGroup()->CustomElementReactionsStack();
stack->EnqueueUpgradeReaction(aElement, aDefinition);
}
/* static */
void nsContentUtils::EnqueueLifecycleCallback(
Document::ElementCallbackType aType, Element* aCustomElement,
LifecycleCallbackArgs* aArgs,
LifecycleAdoptedCallbackArgs* aAdoptedCallbackArgs,
CustomElementDefinition* aDefinition) {
// No DocGroup means no custom element reactions stack.
if (!aCustomElement->OwnerDoc()->GetDocGroup()) {
return;
}
CustomElementRegistry::EnqueueLifecycleCallback(
aType, aCustomElement, aArgs, aAdoptedCallbackArgs, aDefinition);
}
/* static */
bool nsContentUtils::AttemptLargeAllocationLoad(nsIHttpChannel* aChannel) {
MOZ_ASSERT(aChannel);
nsCOMPtr<nsILoadGroup> loadGroup;
nsresult rv = aChannel->GetLoadGroup(getter_AddRefs(loadGroup));
if (NS_WARN_IF(NS_FAILED(rv) || !loadGroup)) {
return false;
}
nsCOMPtr<nsIInterfaceRequestor> callbacks;
rv = loadGroup->GetNotificationCallbacks(getter_AddRefs(callbacks));
if (NS_WARN_IF(NS_FAILED(rv) || !callbacks)) {
return false;
}
nsCOMPtr<nsILoadContext> loadContext = do_GetInterface(callbacks);
if (NS_WARN_IF(!loadContext)) {
return false;
}
nsCOMPtr<mozIDOMWindowProxy> window;
rv = loadContext->GetAssociatedWindow(getter_AddRefs(window));
if (NS_WARN_IF(NS_FAILED(rv) || !window)) {
return false;
}
nsPIDOMWindowOuter* outer = nsPIDOMWindowOuter::From(window);
if (NS_WARN_IF(!outer)) {
return false;
}
if (!XRE_IsContentProcess()) {
outer->SetLargeAllocStatus(LargeAllocStatus::NON_E10S);
return false;
}
nsIDocShell* docShell = outer->GetDocShell();
if (!docShell->GetIsOnlyToplevelInTabGroup()) {
outer->SetLargeAllocStatus(LargeAllocStatus::NOT_ONLY_TOPLEVEL_IN_TABGROUP);
return false;
}
// Get the request method, and check if it is a GET request. If it is not GET,
// then we cannot perform a large allocation load.
nsAutoCString requestMethod;
rv = aChannel->GetRequestMethod(requestMethod);
NS_ENSURE_SUCCESS(rv, false);
if (NS_WARN_IF(!requestMethod.LowerCaseEqualsLiteral("get"))) {
outer->SetLargeAllocStatus(LargeAllocStatus::NON_GET);
return false;
}
BrowserChild* browserChild = BrowserChild::GetFrom(outer);
NS_ENSURE_TRUE(browserChild, false);
if (browserChild->IsAwaitingLargeAlloc()) {
NS_WARNING(
"In a Large-Allocation BrowserChild, ignoring Large-Allocation "
"header!");
browserChild->StopAwaitingLargeAlloc();
outer->SetLargeAllocStatus(LargeAllocStatus::SUCCESS);
return false;
}
// On Win32 systems, we want to behave differently, so set the isWin32 bool to
// be true iff we are on win32.
#if defined(XP_WIN) && defined(_X86_)
const bool isWin32 = true;
#else
const bool isWin32 = false;
#endif
// We want to enable the large allocation header on 32-bit windows machines,
// and disable it on other machines, while still printing diagnostic messages.
// dom.largeAllocation.forceEnable can allow you to enable the process
// switching behavior of the Large-Allocation header on non 32-bit windows
// machines.
bool largeAllocEnabled =
isWin32 || StaticPrefs::dom_largeAllocation_forceEnable();
if (!largeAllocEnabled) {
NS_WARNING(
"dom.largeAllocation.forceEnable not set - "
"ignoring otherwise successful Large-Allocation header.");
// On platforms which aren't WIN32, we don't activate the largeAllocation
// header, instead we simply emit diagnostics into the console.
outer->SetLargeAllocStatus(LargeAllocStatus::NON_WIN32);
return false;
}
// At this point the fress process load should succeed! We just need to get
// ourselves a nsIWebBrowserChrome3 to ask to perform the reload. We should
// have one, as we have already confirmed that we are running in a content
// process.
nsCOMPtr<nsIDocShellTreeOwner> treeOwner;
docShell->GetTreeOwner(getter_AddRefs(treeOwner));
NS_ENSURE_TRUE(treeOwner, false);
nsCOMPtr<nsIWebBrowserChrome3> wbc3 = do_GetInterface(treeOwner);
NS_ENSURE_TRUE(wbc3, false);
nsCOMPtr<nsIURI> uri;
rv = aChannel->GetURI(getter_AddRefs(uri));
NS_ENSURE_SUCCESS(rv, false);
NS_ENSURE_TRUE(uri, false);
nsCOMPtr<nsIReferrerInfo> referrerInfo;
rv = aChannel->GetReferrerInfo(getter_AddRefs(referrerInfo));
NS_ENSURE_SUCCESS(rv, false);
nsCOMPtr<nsILoadInfo> loadInfo = aChannel->LoadInfo();
nsCOMPtr<nsIPrincipal> triggeringPrincipal = loadInfo->TriggeringPrincipal();
nsCOMPtr<nsIContentSecurityPolicy> csp = loadInfo->GetCspToInherit();
// Get the channel's load flags, and use them to generate nsIWebNavigation
// load flags. We want to make sure to propagate the refresh and cache busting
// flags.
nsLoadFlags channelLoadFlags;
aChannel->GetLoadFlags(&channelLoadFlags);
uint32_t webnavLoadFlags = nsIWebNavigation::LOAD_FLAGS_NONE;
if (channelLoadFlags & nsIRequest::LOAD_BYPASS_CACHE) {
webnavLoadFlags |= nsIWebNavigation::LOAD_FLAGS_BYPASS_CACHE;
webnavLoadFlags |= nsIWebNavigation::LOAD_FLAGS_BYPASS_PROXY;
} else if (channelLoadFlags & nsIRequest::VALIDATE_ALWAYS) {
webnavLoadFlags |= nsIWebNavigation::LOAD_FLAGS_IS_REFRESH;
}
// Actually perform the cross process load
bool reloadSucceeded = false;
rv = wbc3->ReloadInFreshProcess(docShell, uri, referrerInfo,
triggeringPrincipal, webnavLoadFlags, csp,
&reloadSucceeded);
NS_ENSURE_SUCCESS(rv, false);
return reloadSucceeded;
}
/* static */
void nsContentUtils::AppendDocumentLevelNativeAnonymousContentTo(
Document* aDocument, nsTArray<nsIContent*>& aElements) {
MOZ_ASSERT(aDocument);
#ifdef DEBUG
size_t oldLength = aElements.Length();
#endif
if (PresShell* presShell = aDocument->GetPresShell()) {
if (nsIFrame* scrollFrame = presShell->GetRootScrollFrame()) {
nsIAnonymousContentCreator* creator = do_QueryFrame(scrollFrame);
MOZ_ASSERT(
creator,
"scroll frame should always implement nsIAnonymousContentCreator");
creator->AppendAnonymousContentTo(aElements, 0);
}
if (nsCanvasFrame* canvasFrame = presShell->GetCanvasFrame()) {
if (Element* container = canvasFrame->GetCustomContentContainer()) {
aElements.AppendElement(container);
}
}
}
#ifdef DEBUG
for (size_t i = oldLength; i < aElements.Length(); i++) {
MOZ_ASSERT(
aElements[i]->GetProperty(nsGkAtoms::docLevelNativeAnonymousContent),
"Someone here has lied, or missed to flag the node");
}
#endif
}
static void AppendNativeAnonymousChildrenFromFrame(nsIFrame* aFrame,
nsTArray<nsIContent*>& aKids,
uint32_t aFlags) {
if (nsIAnonymousContentCreator* ac = do_QueryFrame(aFrame)) {
ac->AppendAnonymousContentTo(aKids, aFlags);
}
}
/* static */
void nsContentUtils::AppendNativeAnonymousChildren(const nsIContent* aContent,
nsTArray<nsIContent*>& aKids,
uint32_t aFlags) {
if (aContent->MayHaveAnonymousChildren()) {
if (nsIFrame* primaryFrame = aContent->GetPrimaryFrame()) {
// NAC created by the element's primary frame.
AppendNativeAnonymousChildrenFromFrame(primaryFrame, aKids, aFlags);
// NAC created by any other non-primary frames for the element.
AutoTArray<nsIFrame::OwnedAnonBox, 8> ownedAnonBoxes;
primaryFrame->AppendOwnedAnonBoxes(ownedAnonBoxes);
for (nsIFrame::OwnedAnonBox& box : ownedAnonBoxes) {
MOZ_ASSERT(box.mAnonBoxFrame->GetContent() == aContent);
AppendNativeAnonymousChildrenFromFrame(box.mAnonBoxFrame, aKids,
aFlags);
}
}
// Get manually created NAC (editor resize handles, etc.).
if (auto nac = static_cast<ManualNACArray*>(
aContent->GetProperty(nsGkAtoms::manualNACProperty))) {
aKids.AppendElements(*nac);
}
}
// The root scroll frame is not the primary frame of the root element.
// Detect and handle this case.
if (!(aFlags & nsIContent::eSkipDocumentLevelNativeAnonymousContent) &&
aContent == aContent->OwnerDoc()->GetRootElement()) {
AppendDocumentLevelNativeAnonymousContentTo(aContent->OwnerDoc(), aKids);
}
}
/* static */
bool nsContentUtils::QueryTriggeringPrincipal(
nsIContent* aLoadingNode, nsIPrincipal* aDefaultPrincipal,
nsIPrincipal** aTriggeringPrincipal) {
MOZ_ASSERT(aLoadingNode);
MOZ_ASSERT(aTriggeringPrincipal);
bool result = false;
nsCOMPtr<nsIPrincipal> loadingPrincipal = aDefaultPrincipal;
if (!loadingPrincipal) {
loadingPrincipal = aLoadingNode->NodePrincipal();
}
// If aLoadingNode is content, bail out early.
if (!aLoadingNode->NodePrincipal()->IsSystemPrincipal()) {
loadingPrincipal.forget(aTriggeringPrincipal);
return result;
}
nsAutoString loadingStr;
if (aLoadingNode->IsElement()) {
aLoadingNode->AsElement()->GetAttr(
kNameSpaceID_None, nsGkAtoms::triggeringprincipal, loadingStr);
}
// Fall back if 'triggeringprincipal' isn't specified,
if (loadingStr.IsEmpty()) {
loadingPrincipal.forget(aTriggeringPrincipal);
return result;
}
nsCString binary;
nsresult rv = Base64Decode(NS_ConvertUTF16toUTF8(loadingStr), binary);
if (NS_SUCCEEDED(rv)) {
nsCOMPtr<nsIPrincipal> serializedPrin = BasePrincipal::FromJSON(binary);
if (serializedPrin) {
result = true;
serializedPrin.forget(aTriggeringPrincipal);
}
} else {
MOZ_ASSERT(false, "Unable to deserialize base64 principal");
}
if (!result) {
// Fallback if the deserialization is failed.
loadingPrincipal.forget(aTriggeringPrincipal);
}
return result;
}
/* static */
void nsContentUtils::GetContentPolicyTypeForUIImageLoading(
nsIContent* aLoadingNode, nsIPrincipal** aTriggeringPrincipal,
nsContentPolicyType& aContentPolicyType, uint64_t* aRequestContextID) {
MOZ_ASSERT(aRequestContextID);
bool result = QueryTriggeringPrincipal(aLoadingNode, aTriggeringPrincipal);
if (result) {
// Set the content policy type to TYPE_INTERNAL_IMAGE_FAVICON for
// indicating it's a favicon loading.
aContentPolicyType = nsIContentPolicy::TYPE_INTERNAL_IMAGE_FAVICON;
nsAutoString requestContextID;
if (aLoadingNode->IsElement()) {
aLoadingNode->AsElement()->GetAttr(
kNameSpaceID_None, nsGkAtoms::requestcontextid, requestContextID);
}
nsresult rv;
int64_t val = requestContextID.ToInteger64(&rv);
*aRequestContextID = NS_SUCCEEDED(rv) ? val : 0;
} else {
aContentPolicyType = nsIContentPolicy::TYPE_INTERNAL_IMAGE;
}
}
/* static */
nsresult nsContentUtils::CreateJSValueFromSequenceOfObject(
JSContext* aCx, const Sequence<JSObject*>& aTransfer,
JS::MutableHandle<JS::Value> aValue) {
if (aTransfer.IsEmpty()) {
return NS_OK;
}
JS::Rooted<JSObject*> array(aCx, JS_NewArrayObject(aCx, aTransfer.Length()));
if (!array) {
return NS_ERROR_OUT_OF_MEMORY;
}
for (uint32_t i = 0; i < aTransfer.Length(); ++i) {
JS::Rooted<JSObject*> object(aCx, aTransfer[i]);
if (!object) {
continue;
}
if (NS_WARN_IF(
!JS_DefineElement(aCx, array, i, object, JSPROP_ENUMERATE))) {
return NS_ERROR_OUT_OF_MEMORY;
}
}
aValue.setObject(*array);
return NS_OK;
}
/* static */
bool nsContentUtils::ShouldBlockReservedKeys(WidgetKeyboardEvent* aKeyEvent) {
nsCOMPtr<nsIPrincipal> principal;
nsCOMPtr<Element> targetElement =
do_QueryInterface(aKeyEvent->mOriginalTarget);
nsCOMPtr<nsIBrowser> targetBrowser;
if (targetElement) {
targetBrowser = targetElement->AsBrowser();
}
bool isRemoteBrowser = false;
if (targetBrowser) {
targetBrowser->GetIsRemoteBrowser(&isRemoteBrowser);
}
if (isRemoteBrowser) {
targetBrowser->GetContentPrincipal(getter_AddRefs(principal));
} else {
// Get the top-level document.
nsCOMPtr<nsIContent> content =
do_QueryInterface(aKeyEvent->mOriginalTarget);
if (content) {
Document* doc = content->GetUncomposedDoc();
if (doc) {
nsCOMPtr<nsIDocShellTreeItem> docShell = doc->GetDocShell();
if (docShell &&
docShell->ItemType() == nsIDocShellTreeItem::typeContent) {
nsCOMPtr<nsIDocShellTreeItem> rootItem;
docShell->GetInProcessSameTypeRootTreeItem(getter_AddRefs(rootItem));
if (rootItem && rootItem->GetDocument()) {
principal = rootItem->GetDocument()->NodePrincipal();
}
}
}
}
}
if (principal) {
return nsContentUtils::IsSitePermDeny(principal,
NS_LITERAL_CSTRING("shortcuts"));
}
return false;
}
/**
* Checks whether the given type is a supported document type for
* loading within the nsObjectLoadingContent specified by aContent.
*
* NOTE Helper method for nsContentUtils::HtmlObjectContentTypeForMIMEType.
* NOTE Does not take content policy or capabilities into account
*/
static bool HtmlObjectContentSupportsDocument(const nsCString& aMimeType,
nsIContent* aContent) {
nsCOMPtr<nsIWebNavigationInfo> info(
do_GetService(NS_WEBNAVIGATION_INFO_CONTRACTID));
if (!info) {
return false;
}
nsCOMPtr<nsIWebNavigation> webNav;
if (aContent) {
Document* currentDoc = aContent->GetComposedDoc();
if (currentDoc) {
webNav = do_GetInterface(currentDoc->GetWindow());
}
}
uint32_t supported;
nsresult rv = info->IsTypeSupported(aMimeType, webNav, &supported);
if (NS_FAILED(rv)) {
return false;
}
if (supported != nsIWebNavigationInfo::UNSUPPORTED) {
// Don't want to support plugins as documents
return supported != nsIWebNavigationInfo::PLUGIN;
}
// Try a stream converter
// NOTE: We treat any type we can convert from as a supported type. If a
// type is not actually supported, the URI loader will detect that and
// return an error, and we'll fallback.
nsCOMPtr<nsIStreamConverterService> convServ =
do_GetService("@mozilla.org/streamConverters;1");
bool canConvert = false;
if (convServ) {
rv = convServ->CanConvert(aMimeType.get(), "*/*", &canConvert);
}
return NS_SUCCEEDED(rv) && canConvert;
}
/* static */
already_AddRefed<nsIPluginTag> nsContentUtils::PluginTagForType(
const nsCString& aMIMEType, bool aNoFakePlugin) {
RefPtr<nsPluginHost> pluginHost = nsPluginHost::GetInst();
nsCOMPtr<nsIPluginTag> tag;
NS_ENSURE_TRUE(pluginHost, nullptr);
// ShouldPlay will handle the case where the plugin is disabled
pluginHost->GetPluginTagForType(
aMIMEType,
aNoFakePlugin ? nsPluginHost::eExcludeFake : nsPluginHost::eExcludeNone,
getter_AddRefs(tag));
return tag.forget();
}
/* static */
uint32_t nsContentUtils::HtmlObjectContentTypeForMIMEType(
const nsCString& aMIMEType, bool aNoFakePlugin, nsIContent* aContent) {
if (aMIMEType.IsEmpty()) {
return nsIObjectLoadingContent::TYPE_NULL;
}
if (imgLoader::SupportImageWithMimeType(aMIMEType.get())) {
return nsIObjectLoadingContent::TYPE_IMAGE;
}
// Faking support of the PDF content as a document for EMBED tags
// when internal PDF viewer is enabled.
if (aMIMEType.LowerCaseEqualsLiteral("application/pdf") && IsPDFJSEnabled()) {
return nsIObjectLoadingContent::TYPE_DOCUMENT;
}
if (HtmlObjectContentSupportsDocument(aMIMEType, aContent)) {
return nsIObjectLoadingContent::TYPE_DOCUMENT;
}
RefPtr<nsPluginHost> pluginHost = nsPluginHost::GetInst();
if (pluginHost) {
nsCOMPtr<nsIPluginTag> tag = PluginTagForType(aMIMEType, aNoFakePlugin);
if (tag) {
if (!aNoFakePlugin &&
nsCOMPtr<nsIFakePluginTag>(do_QueryInterface(tag))) {
return nsIObjectLoadingContent::TYPE_FAKE_PLUGIN;
}
// ShouldPlay will handle checking for disabled plugins
return nsIObjectLoadingContent::TYPE_PLUGIN;
}
}
return nsIObjectLoadingContent::TYPE_NULL;
}
/* static */
already_AddRefed<nsISerialEventTarget> nsContentUtils::GetEventTargetByLoadInfo(
nsILoadInfo* aLoadInfo, TaskCategory aCategory) {
if (NS_WARN_IF(!aLoadInfo)) {
return nullptr;
}
RefPtr<Document> doc;
aLoadInfo->GetLoadingDocument(getter_AddRefs(doc));
nsCOMPtr<nsISerialEventTarget> target;
if (doc) {
if (DocGroup* group = doc->GetDocGroup()) {
target = group->EventTargetFor(aCategory);
}
} else {
// There's no document yet, but this might be a top-level load where we can
// find a TabGroup.
uint64_t outerWindowId;
if (NS_FAILED(aLoadInfo->GetOuterWindowID(&outerWindowId))) {
// No window. This might be an add-on XHR, a service worker request, or
// something else.
return nullptr;
}
RefPtr<nsGlobalWindowOuter> window =
nsGlobalWindowOuter::GetOuterWindowWithId(outerWindowId);
if (!window) {
return nullptr;
}
target = window->TabGroup()->EventTargetFor(aCategory);
}
return target.forget();
}
/* static */
bool nsContentUtils::IsLocalRefURL(const nsString& aString) {
return !aString.IsEmpty() && aString[0] == '#';
}
// We use only 53 bits for the ID so that it can be converted to and from a JS
// value without loss of precision. The upper bits of the ID hold the process
// ID. The lower bits identify the object itself.
static constexpr uint64_t kIdTotalBits = 53;
static constexpr uint64_t kIdProcessBits = 22;
static constexpr uint64_t kIdBits = kIdTotalBits - kIdProcessBits;
/* static */ uint64_t GenerateProcessSpecificId(uint64_t aId) {
uint64_t processId = 0;
if (XRE_IsContentProcess()) {
ContentChild* cc = ContentChild::GetSingleton();
processId = cc->GetID();
}
MOZ_RELEASE_ASSERT(processId < (uint64_t(1) << kIdProcessBits));
uint64_t processBits = processId & ((uint64_t(1) << kIdProcessBits) - 1);
uint64_t id = aId;
MOZ_RELEASE_ASSERT(id < (uint64_t(1) << kIdBits));
uint64_t bits = id & ((uint64_t(1) << kIdBits) - 1);
// Set the high bit for middleman processes so it doesn't conflict with the
// content process's generated IDs.
if (recordreplay::IsMiddleman()) {
bits |= uint64_t(1) << (kIdBits - 1);
}
return (processBits << kIdBits) | bits;
}
// Next process-local Tab ID.
static uint64_t gNextTabId = 0;
/* static */
uint64_t nsContentUtils::GenerateTabId() {
return GenerateProcessSpecificId(++gNextTabId);
}
// Next process-local Browsing Context ID.
static uint64_t gNextBrowsingContextId = 0;
/* static */
uint64_t nsContentUtils::GenerateBrowsingContextId() {
return GenerateProcessSpecificId(++gNextBrowsingContextId);
}
// Next process-local Window ID.
static uint64_t gNextWindowId = 0;
/* static */
uint64_t nsContentUtils::GenerateWindowId() {
return GenerateProcessSpecificId(++gNextWindowId);
}
/* static */
bool nsContentUtils::GetUserIsInteracting() {
return UserInteractionObserver::sUserActive;
}
/* static */
bool nsContentUtils::GetSourceMapURL(nsIHttpChannel* aChannel,
nsACString& aResult) {
nsresult rv =
aChannel->GetResponseHeader(NS_LITERAL_CSTRING("SourceMap"), aResult);
if (NS_FAILED(rv)) {
rv =
aChannel->GetResponseHeader(NS_LITERAL_CSTRING("X-SourceMap"), aResult);
}
return NS_SUCCEEDED(rv);
}
/* static */
bool nsContentUtils::IsMessageInputEvent(const IPC::Message& aMsg) {
if ((aMsg.type() & mozilla::dom::PBrowser::PBrowserStart) ==
mozilla::dom::PBrowser::PBrowserStart) {
switch (aMsg.type()) {
case mozilla::dom::PBrowser::Msg_RealMouseMoveEvent__ID:
case mozilla::dom::PBrowser::Msg_RealMouseButtonEvent__ID:
case mozilla::dom::PBrowser::Msg_RealKeyEvent__ID:
case mozilla::dom::PBrowser::Msg_MouseWheelEvent__ID:
case mozilla::dom::PBrowser::Msg_RealTouchEvent__ID:
case mozilla::dom::PBrowser::Msg_RealTouchMoveEvent__ID:
case mozilla::dom::PBrowser::Msg_RealDragEvent__ID:
case mozilla::dom::PBrowser::Msg_UpdateDimensions__ID:
case mozilla::dom::PBrowser::Msg_MouseEvent__ID:
case mozilla::dom::PBrowser::Msg_SetDocShellIsActive__ID:
return true;
}
}
return false;
}
static const char* kUserInteractionInactive = "user-interaction-inactive";
static const char* kUserInteractionActive = "user-interaction-active";
void nsContentUtils::UserInteractionObserver::Init() {
// Listen for the observer messages from EventStateManager which are telling
// us whether or not the user is interacting.
nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
obs->AddObserver(this, kUserInteractionInactive, false);
obs->AddObserver(this, kUserInteractionActive, false);
// We can't register ourselves as an annotator yet, as the
// BackgroundHangMonitor hasn't started yet. It will have started by the
// time we have the chance to spin the event loop.
RefPtr<UserInteractionObserver> self = this;
NS_DispatchToMainThread(NS_NewRunnableFunction(
"nsContentUtils::UserInteractionObserver::Init",
[=]() { BackgroundHangMonitor::RegisterAnnotator(*self); }));
}
void nsContentUtils::UserInteractionObserver::Shutdown() {
nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
if (obs) {
obs->RemoveObserver(this, kUserInteractionInactive);
obs->RemoveObserver(this, kUserInteractionActive);
}
BackgroundHangMonitor::UnregisterAnnotator(*this);
}
/**
* NB: This function is always called by the BackgroundHangMonitor thread.
* Plan accordingly
*/
void nsContentUtils::UserInteractionObserver::AnnotateHang(
BackgroundHangAnnotations& aAnnotations) {
// NOTE: Only annotate the hang report if the user is known to be interacting.
if (sUserActive) {
aAnnotations.AddAnnotation(NS_LITERAL_STRING("UserInteracting"), true);
}
}
NS_IMETHODIMP
nsContentUtils::UserInteractionObserver::Observe(nsISupports* aSubject,
const char* aTopic,
const char16_t* aData) {
if (!strcmp(aTopic, kUserInteractionInactive)) {
sUserActive = false;
} else if (!strcmp(aTopic, kUserInteractionActive)) {
sUserActive = true;
} else {
NS_WARNING("Unexpected observer notification");
}
return NS_OK;
}
Atomic<bool> nsContentUtils::UserInteractionObserver::sUserActive(false);
NS_IMPL_ISUPPORTS(nsContentUtils::UserInteractionObserver, nsIObserver)
/* static */
bool nsContentUtils::IsSpecialName(const nsAString& aName) {
return aName.LowerCaseEqualsLiteral("_blank") ||
aName.LowerCaseEqualsLiteral("_top") ||
aName.LowerCaseEqualsLiteral("_parent") ||
aName.LowerCaseEqualsLiteral("_self");
}
/* static */
bool nsContentUtils::IsOverridingWindowName(const nsAString& aName) {
return !aName.IsEmpty() && !IsSpecialName(aName);
}
// Unfortunately, we can't unwrap an IDL object using only a concrete type.
// We need to calculate type data based on the IDL typename. Which means
// wrapping our templated function in a macro.
#define EXTRACT_EXN_VALUES(T, ...) \
ExtractExceptionValues<mozilla::dom::prototypes::id::T, \
T##_Binding::NativeType, T>(__VA_ARGS__) \
.isOk()
template <prototypes::ID PrototypeID, class NativeType, typename T>
static Result<Ok, nsresult> ExtractExceptionValues(
JSContext* aCx, JS::HandleObject aObj, nsAString& aSourceSpecOut,
uint32_t* aLineOut, uint32_t* aColumnOut, nsString& aMessageOut) {
AssertStaticUnwrapOK<PrototypeID>();
RefPtr<T> exn;
MOZ_TRY((UnwrapObject<PrototypeID, NativeType>(aObj, exn, nullptr)));
exn->GetFilename(aCx, aSourceSpecOut);
if (!aSourceSpecOut.IsEmpty()) {
*aLineOut = exn->LineNumber(aCx);
*aColumnOut = exn->ColumnNumber();
}
exn->GetName(aMessageOut);
aMessageOut.AppendLiteral(": ");
nsAutoString message;
exn->GetMessageMoz(message);
aMessageOut.Append(message);
return Ok();
}
/* static */
void nsContentUtils::ExtractErrorValues(
JSContext* aCx, JS::Handle<JS::Value> aValue, nsACString& aSourceSpecOut,
uint32_t* aLineOut, uint32_t* aColumnOut, nsString& aMessageOut) {
nsAutoString sourceSpec;
ExtractErrorValues(aCx, aValue, sourceSpec, aLineOut, aColumnOut,
aMessageOut);
CopyUTF16toUTF8(sourceSpec, aSourceSpecOut);
}
/* static */
void nsContentUtils::ExtractErrorValues(
JSContext* aCx, JS::Handle<JS::Value> aValue, nsAString& aSourceSpecOut,
uint32_t* aLineOut, uint32_t* aColumnOut, nsString& aMessageOut) {
MOZ_ASSERT(aLineOut);
MOZ_ASSERT(aColumnOut);
if (aValue.isObject()) {
JS::Rooted<JSObject*> obj(aCx, &aValue.toObject());
// Try to process as an Error object. Use the file/line/column values
// from the Error as they will be more specific to the root cause of
// the problem.
JSErrorReport* err = obj ? JS_ErrorFromException(aCx, obj) : nullptr;
if (err) {
// Use xpc to extract the error message only. We don't actually send
// this report anywhere.
RefPtr<xpc::ErrorReport> report = new xpc::ErrorReport();
report->Init(err,
"<unknown>", // toString result
false, // chrome
0); // window ID
if (!report->mFileName.IsEmpty()) {
aSourceSpecOut = report->mFileName;
*aLineOut = report->mLineNumber;
*aColumnOut = report->mColumn;
}
aMessageOut.Assign(report->mErrorMsg);
}
// Next, try to unwrap the rejection value as a DOMException.
else if (EXTRACT_EXN_VALUES(DOMException, aCx, obj, aSourceSpecOut,
aLineOut, aColumnOut, aMessageOut)) {
return;
}
// Next, try to unwrap the rejection value as an XPC Exception.
else if (EXTRACT_EXN_VALUES(Exception, aCx, obj, aSourceSpecOut, aLineOut,
aColumnOut, aMessageOut)) {
return;
}
}
// If we could not unwrap a specific error type, then perform default safe
// string conversions on primitives. Objects will result in "[Object]"
// unfortunately.
if (aMessageOut.IsEmpty()) {
nsAutoJSString jsString;
if (jsString.init(aCx, aValue)) {
aMessageOut = jsString;
} else {
JS_ClearPendingException(aCx);
}
}
}
#undef EXTRACT_EXN_VALUES
/* static */
bool nsContentUtils::ContentIsLink(nsIContent* aContent) {
if (!aContent || !aContent->IsElement()) {
return false;
}
if (aContent->IsHTMLElement(nsGkAtoms::a)) {
return true;
}
return aContent->AsElement()->AttrValueIs(kNameSpaceID_XLink, nsGkAtoms::type,
nsGkAtoms::simple, eCaseMatters);
}
/* static */
already_AddRefed<ContentFrameMessageManager>
nsContentUtils::TryGetBrowserChildGlobal(nsISupports* aFrom) {
RefPtr<nsFrameLoaderOwner> frameLoaderOwner = do_QueryObject(aFrom);
if (!frameLoaderOwner) {
return nullptr;
}
RefPtr<nsFrameLoader> frameLoader = frameLoaderOwner->GetFrameLoader();
if (!frameLoader) {
return nullptr;
}
RefPtr<ContentFrameMessageManager> manager =
frameLoader->GetBrowserChildMessageManager();
return manager.forget();
}
/* static */
uint32_t nsContentUtils::InnerOrOuterWindowCreated() {
MOZ_ASSERT(NS_IsMainThread());
++sInnerOrOuterWindowCount;
return ++sInnerOrOuterWindowSerialCounter;
}
/* static */
void nsContentUtils::InnerOrOuterWindowDestroyed() {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(sInnerOrOuterWindowCount > 0);
--sInnerOrOuterWindowCount;
}
static bool JSONCreator(const char16_t* aBuf, uint32_t aLen, void* aData) {
nsAString* result = static_cast<nsAString*>(aData);
result->Append(static_cast<const char16_t*>(aBuf),
static_cast<uint32_t>(aLen));
return true;
}
/* static */
bool nsContentUtils::StringifyJSON(JSContext* aCx,
JS::MutableHandle<JS::Value> aValue,
nsAString& aOutStr) {
MOZ_ASSERT(aCx);
aOutStr.Truncate();
JS::RootedValue value(aCx, aValue.get());
nsAutoString serializedValue;
NS_ENSURE_TRUE(JS_Stringify(aCx, &value, nullptr, JS::NullHandleValue,
JSONCreator, &serializedValue),
false);
aOutStr = serializedValue;
return true;
}
/* static */
bool nsContentUtils::
HighPriorityEventPendingForTopLevelDocumentBeforeContentfulPaint(
Document* aDocument) {
if (!aDocument || aDocument->IsLoadedAsData()) {
return false;
}
Document* topLevel = aDocument->GetTopLevelContentDocument();
return topLevel && topLevel->GetPresShell() &&
topLevel->GetPresShell()->GetPresContext() &&
!topLevel->GetPresShell()->GetPresContext()->HadContentfulPaint() &&
nsThreadManager::MainThreadHasPendingHighPriorityEvents();
}
/* static */
bool nsContentUtils::IsURIInPrefList(nsIURI* aURI, const char* aPrefName) {
MOZ_ASSERT(aPrefName);
nsAutoCString blackList;
Preferences::GetCString(aPrefName, blackList);
ToLowerCase(blackList);
return IsURIInList(aURI, blackList);
}
/* static */
bool nsContentUtils::IsURIInList(nsIURI* aURI, const nsCString& aBlackList) {
#ifdef DEBUG
nsAutoCString blackListLowerCase(aBlackList);
ToLowerCase(blackListLowerCase);
MOZ_ASSERT(blackListLowerCase.Equals(aBlackList),
"The aBlackList argument should be lower-case");
#endif
if (!aURI) {
return false;
}
nsAutoCString scheme;
aURI->GetScheme(scheme);
if (!scheme.EqualsLiteral("http") && !scheme.EqualsLiteral("https")) {
return false;
}
nsAutoCString host;
aURI->GetHost(host);
if (host.IsEmpty()) {
return false;
}
ToLowerCase(host);
if (aBlackList.IsEmpty()) {
return false;
}
// The list is comma separated domain list. Each item may start with "*.".
// If starts with "*.", it matches any sub-domains.
for (;;) {
int32_t index = aBlackList.Find(host, false);
if (index >= 0 &&
static_cast<uint32_t>(index) + host.Length() <= aBlackList.Length() &&
// If start of the black list or next to ","?
(!index || aBlackList[index - 1] == ',')) {
// If end of the black list or immediately before ","?
size_t indexAfterHost = index + host.Length();
if (indexAfterHost == aBlackList.Length() ||
aBlackList[indexAfterHost] == ',') {
return true;
}
// If next character is '/', we need to check the path too.
// We assume the path in blacklist means "/foo" + "*".
if (aBlackList[indexAfterHost] == '/') {
int32_t endOfPath = aBlackList.Find(",", false, indexAfterHost);
nsDependentCSubstring::size_type length =
endOfPath < 0 ? static_cast<nsDependentCSubstring::size_type>(-1)
: endOfPath - indexAfterHost;
nsDependentCSubstring pathInBlackList(aBlackList, indexAfterHost,
length);
nsAutoCString filePath;
aURI->GetFilePath(filePath);
ToLowerCase(filePath);
if (StringBeginsWith(filePath, pathInBlackList)) {
return true;
}
}
}
int32_t startIndexOfCurrentLevel = host[0] == '*' ? 1 : 0;
int32_t startIndexOfNextLevel =
host.Find(".", false, startIndexOfCurrentLevel + 1);
if (startIndexOfNextLevel <= 0) {
return false;
}
host = NS_LITERAL_CSTRING("*") +
nsDependentCSubstring(host, startIndexOfNextLevel);
}
}
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