mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-17 23:35:34 +00:00
4500 lines
152 KiB
C++
4500 lines
152 KiB
C++
/* -*- 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/. */
|
||
|
||
/*
|
||
* Base class for all element classes; this provides an implementation
|
||
* of DOM Core's Element, implements nsIContent, provides
|
||
* utility methods for subclasses, and so forth.
|
||
*/
|
||
|
||
#include "mozilla/dom/Element.h"
|
||
#include "mozilla/dom/ElementInlines.h"
|
||
|
||
#include <inttypes.h>
|
||
#include <initializer_list>
|
||
#include <new>
|
||
#include "DOMIntersectionObserver.h"
|
||
#include "DOMMatrix.h"
|
||
#include "ExpandedPrincipal.h"
|
||
#include "PresShellInlines.h"
|
||
#include "jsapi.h"
|
||
#include "mozAutoDocUpdate.h"
|
||
#include "mozilla/AnimationComparator.h"
|
||
#include "mozilla/AnimationTarget.h"
|
||
#include "mozilla/AsyncEventDispatcher.h"
|
||
#include "mozilla/CORSMode.h"
|
||
#include "mozilla/ComputedStyle.h"
|
||
#include "mozilla/ContentEvents.h"
|
||
#include "mozilla/DebugOnly.h"
|
||
#include "mozilla/DeclarationBlock.h"
|
||
#include "mozilla/EffectCompositor.h"
|
||
#include "mozilla/EffectSet.h"
|
||
#include "mozilla/ErrorResult.h"
|
||
#include "mozilla/EventDispatcher.h"
|
||
#include "mozilla/EventListenerManager.h"
|
||
#include "mozilla/EventStateManager.h"
|
||
#include "mozilla/EventStates.h"
|
||
#include "mozilla/FloatingPoint.h"
|
||
#include "mozilla/FullscreenChange.h"
|
||
#include "mozilla/InternalMutationEvent.h"
|
||
#include "mozilla/Likely.h"
|
||
#include "mozilla/LinkedList.h"
|
||
#include "mozilla/LookAndFeel.h"
|
||
#include "mozilla/MouseEvents.h"
|
||
#include "mozilla/NotNull.h"
|
||
#include "mozilla/PointerLockManager.h"
|
||
#include "mozilla/PresShell.h"
|
||
#include "mozilla/PresShellForwards.h"
|
||
#include "mozilla/ReflowOutput.h"
|
||
#include "mozilla/RelativeTo.h"
|
||
#include "mozilla/ScrollOrigin.h"
|
||
#include "mozilla/ScrollTypes.h"
|
||
#include "mozilla/ServoStyleConsts.h"
|
||
#include "mozilla/ServoStyleConstsInlines.h"
|
||
#include "mozilla/SizeOfState.h"
|
||
#include "mozilla/StaticAnalysisFunctions.h"
|
||
#include "mozilla/StaticPrefs_dom.h"
|
||
#include "mozilla/StaticPrefs_full_screen_api.h"
|
||
#include "mozilla/TextControlElement.h"
|
||
#include "mozilla/TextEvents.h"
|
||
#include "mozilla/TypedEnumBits.h"
|
||
#include "mozilla/Unused.h"
|
||
#include "mozilla/dom/AnimatableBinding.h"
|
||
#include "mozilla/dom/Animation.h"
|
||
#include "mozilla/dom/Attr.h"
|
||
#include "mozilla/dom/BindContext.h"
|
||
#include "mozilla/dom/BindingDeclarations.h"
|
||
#include "mozilla/dom/CustomElementRegistry.h"
|
||
#include "mozilla/dom/DOMRect.h"
|
||
#include "mozilla/dom/DirectionalityUtils.h"
|
||
#include "mozilla/dom/Document.h"
|
||
#include "mozilla/dom/DocumentFragment.h"
|
||
#include "mozilla/dom/DocumentInlines.h"
|
||
#include "mozilla/dom/DocumentTimeline.h"
|
||
#include "mozilla/dom/ElementBinding.h"
|
||
#include "mozilla/dom/ElementInlines.h"
|
||
#include "mozilla/dom/Flex.h"
|
||
#include "mozilla/dom/FromParser.h"
|
||
#include "mozilla/dom/Grid.h"
|
||
#include "mozilla/dom/HTMLDivElement.h"
|
||
#include "mozilla/dom/HTMLParagraphElement.h"
|
||
#include "mozilla/dom/HTMLPreElement.h"
|
||
#include "mozilla/dom/HTMLSpanElement.h"
|
||
#include "mozilla/dom/HTMLTableCellElement.h"
|
||
#include "mozilla/dom/KeyframeAnimationOptionsBinding.h"
|
||
#include "mozilla/dom/KeyframeEffect.h"
|
||
#include "mozilla/dom/MouseEventBinding.h"
|
||
#include "mozilla/dom/MutationEventBinding.h"
|
||
#include "mozilla/dom/MutationObservers.h"
|
||
#include "mozilla/dom/NodeInfo.h"
|
||
#include "mozilla/dom/PointerEventHandler.h"
|
||
#include "mozilla/dom/Promise.h"
|
||
#include "mozilla/dom/SVGElement.h"
|
||
#include "mozilla/dom/ScriptLoader.h"
|
||
#include "mozilla/dom/ShadowRoot.h"
|
||
#include "mozilla/dom/Text.h"
|
||
#include "mozilla/dom/WindowBinding.h"
|
||
#include "mozilla/dom/nsCSPContext.h"
|
||
#include "mozilla/gfx/BasePoint.h"
|
||
#include "mozilla/gfx/BaseRect.h"
|
||
#include "mozilla/gfx/BaseSize.h"
|
||
#include "mozilla/gfx/Matrix.h"
|
||
#include "nsAtom.h"
|
||
#include "nsAttrName.h"
|
||
#include "nsAttrValueInlines.h"
|
||
#include "nsAttrValueOrString.h"
|
||
#include "nsBaseHashtable.h"
|
||
#include "nsBlockFrame.h"
|
||
#include "nsCOMPtr.h"
|
||
#include "nsContentUtils.h"
|
||
#include "nsCSSPseudoElements.h"
|
||
#include "nsCompatibility.h"
|
||
#include "nsContainerFrame.h"
|
||
#include "nsContentList.h"
|
||
#include "nsContentListDeclarations.h"
|
||
#include "nsCoord.h"
|
||
#include "nsDOMAttributeMap.h"
|
||
#include "nsDOMCSSAttrDeclaration.h"
|
||
#include "nsDOMMutationObserver.h"
|
||
#include "nsDOMString.h"
|
||
#include "nsDOMStringMap.h"
|
||
#include "nsDOMTokenList.h"
|
||
#include "nsDocShell.h"
|
||
#include "nsError.h"
|
||
#include "nsFlexContainerFrame.h"
|
||
#include "nsFocusManager.h"
|
||
#include "nsFrameState.h"
|
||
#include "nsGenericHTMLElement.h"
|
||
#include "nsGkAtoms.h"
|
||
#include "nsGridContainerFrame.h"
|
||
#include "nsIAutoCompletePopup.h"
|
||
#include "nsIBrowser.h"
|
||
#include "nsIContentInlines.h"
|
||
#include "nsIDOMXULButtonElement.h"
|
||
#include "nsIDOMXULContainerElement.h"
|
||
#include "nsIDOMXULControlElement.h"
|
||
#include "nsIDOMXULMenuListElement.h"
|
||
#include "nsIDOMXULMultSelectCntrlEl.h"
|
||
#include "nsIDOMXULRadioGroupElement.h"
|
||
#include "nsIDOMXULRelatedElement.h"
|
||
#include "nsIDOMXULSelectCntrlEl.h"
|
||
#include "nsIDOMXULSelectCntrlItemEl.h"
|
||
#include "nsIDocShell.h"
|
||
#include "nsIFocusManager.h"
|
||
#include "nsIFrame.h"
|
||
#include "nsIGlobalObject.h"
|
||
#include "nsIIOService.h"
|
||
#include "nsIInterfaceRequestor.h"
|
||
#include "nsIMemoryReporter.h"
|
||
#include "nsIPrincipal.h"
|
||
#include "nsIScriptError.h"
|
||
#include "nsIScrollableFrame.h"
|
||
#include "nsISpeculativeConnect.h"
|
||
#include "nsISupports.h"
|
||
#include "nsISupportsUtils.h"
|
||
#include "nsIURI.h"
|
||
#include "nsLayoutUtils.h"
|
||
#include "nsLineBox.h"
|
||
#include "nsNameSpaceManager.h"
|
||
#include "nsNodeInfoManager.h"
|
||
#include "nsPIDOMWindow.h"
|
||
#include "nsPoint.h"
|
||
#include "nsPresContext.h"
|
||
#include "nsQueryFrame.h"
|
||
#include "nsRefPtrHashtable.h"
|
||
#include "nsSize.h"
|
||
#include "nsString.h"
|
||
#include "nsStyleConsts.h"
|
||
#include "nsStyleStruct.h"
|
||
#include "nsStyledElement.h"
|
||
#include "nsTArray.h"
|
||
#include "nsTextNode.h"
|
||
#include "nsThreadUtils.h"
|
||
#include "nsViewManager.h"
|
||
#include "nsWindowSizes.h"
|
||
|
||
#ifdef MOZ_XUL
|
||
# include "nsXULElement.h"
|
||
#endif /* MOZ_XUL */
|
||
|
||
#ifdef DEBUG
|
||
# include "nsRange.h"
|
||
#endif
|
||
|
||
#ifdef ACCESSIBILITY
|
||
# include "nsAccessibilityService.h"
|
||
#endif
|
||
|
||
using mozilla::gfx::Matrix4x4;
|
||
|
||
namespace mozilla::dom {
|
||
|
||
// Verify sizes of nodes. We use a template rather than a direct static
|
||
// assert so that the error message actually displays the sizes.
|
||
// On 32 bit systems the actual allocated size varies a bit between
|
||
// OSes/compilers.
|
||
//
|
||
// We need different numbers on certain build types to deal with the owning
|
||
// thread pointer that comes with the non-threadsafe refcount on
|
||
// nsIContent.
|
||
#ifdef MOZ_THREAD_SAFETY_OWNERSHIP_CHECKS_SUPPORTED
|
||
# define EXTRA_DOM_NODE_BYTES 8
|
||
#else
|
||
# define EXTRA_DOM_NODE_BYTES 0
|
||
#endif
|
||
|
||
#define ASSERT_NODE_SIZE(type, opt_size_64, opt_size_32) \
|
||
template <int a, int sizeOn64, int sizeOn32> \
|
||
struct Check##type##Size { \
|
||
static_assert((sizeof(void*) == 8 && a == sizeOn64) || \
|
||
(sizeof(void*) == 4 && a <= sizeOn32), \
|
||
"DOM size changed"); \
|
||
}; \
|
||
Check##type##Size<sizeof(type), opt_size_64 + EXTRA_DOM_NODE_BYTES, \
|
||
opt_size_32 + EXTRA_DOM_NODE_BYTES> \
|
||
g##type##CES;
|
||
|
||
// Note that mozjemalloc uses a 16 byte quantum, so 64, 80 and 128 are
|
||
// bucket sizes.
|
||
ASSERT_NODE_SIZE(Element, 128, 80);
|
||
ASSERT_NODE_SIZE(HTMLDivElement, 128, 80);
|
||
ASSERT_NODE_SIZE(HTMLParagraphElement, 128, 80);
|
||
ASSERT_NODE_SIZE(HTMLPreElement, 128, 80);
|
||
ASSERT_NODE_SIZE(HTMLSpanElement, 128, 80);
|
||
ASSERT_NODE_SIZE(HTMLTableCellElement, 128, 80);
|
||
ASSERT_NODE_SIZE(Text, 120, 64);
|
||
|
||
#undef ASSERT_NODE_SIZE
|
||
#undef EXTRA_DOM_NODE_BYTES
|
||
|
||
} // namespace mozilla::dom
|
||
|
||
nsAtom* nsIContent::DoGetID() const {
|
||
MOZ_ASSERT(HasID(), "Unexpected call");
|
||
MOZ_ASSERT(IsElement(), "Only elements can have IDs");
|
||
|
||
return AsElement()->GetParsedAttr(nsGkAtoms::id)->GetAtomValue();
|
||
}
|
||
|
||
nsIFrame* nsIContent::GetPrimaryFrame(mozilla::FlushType aType) {
|
||
Document* doc = GetComposedDoc();
|
||
if (!doc) {
|
||
return nullptr;
|
||
}
|
||
|
||
// Cause a flush, so we get up-to-date frame information.
|
||
if (aType != mozilla::FlushType::None) {
|
||
doc->FlushPendingNotifications(aType);
|
||
}
|
||
|
||
return GetPrimaryFrame();
|
||
}
|
||
|
||
namespace mozilla::dom {
|
||
|
||
nsDOMAttributeMap* Element::Attributes() {
|
||
nsDOMSlots* slots = DOMSlots();
|
||
if (!slots->mAttributeMap) {
|
||
slots->mAttributeMap = new nsDOMAttributeMap(this);
|
||
}
|
||
|
||
return slots->mAttributeMap;
|
||
}
|
||
|
||
void Element::SetPointerCapture(int32_t aPointerId, ErrorResult& aError) {
|
||
if (nsContentUtils::ShouldResistFingerprinting(GetComposedDoc()) &&
|
||
aPointerId != PointerEventHandler::GetSpoofedPointerIdForRFP()) {
|
||
aError.ThrowNotFoundError("Invalid pointer id");
|
||
return;
|
||
}
|
||
const PointerInfo* pointerInfo =
|
||
PointerEventHandler::GetPointerInfo(aPointerId);
|
||
if (!pointerInfo) {
|
||
aError.ThrowNotFoundError("Invalid pointer id");
|
||
return;
|
||
}
|
||
if (!IsInComposedDoc()) {
|
||
aError.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
|
||
return;
|
||
}
|
||
if (OwnerDoc()->GetPointerLockElement()) {
|
||
// Throw an exception 'InvalidStateError' while the page has a locked
|
||
// element.
|
||
aError.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
|
||
return;
|
||
}
|
||
if (!pointerInfo->mActiveState ||
|
||
pointerInfo->mActiveDocument != OwnerDoc()) {
|
||
return;
|
||
}
|
||
PointerEventHandler::RequestPointerCaptureById(aPointerId, this);
|
||
}
|
||
|
||
void Element::ReleasePointerCapture(int32_t aPointerId, ErrorResult& aError) {
|
||
if (nsContentUtils::ShouldResistFingerprinting(GetComposedDoc()) &&
|
||
aPointerId != PointerEventHandler::GetSpoofedPointerIdForRFP()) {
|
||
aError.ThrowNotFoundError("Invalid pointer id");
|
||
return;
|
||
}
|
||
if (!PointerEventHandler::GetPointerInfo(aPointerId)) {
|
||
aError.ThrowNotFoundError("Invalid pointer id");
|
||
return;
|
||
}
|
||
if (HasPointerCapture(aPointerId)) {
|
||
PointerEventHandler::ReleasePointerCaptureById(aPointerId);
|
||
}
|
||
}
|
||
|
||
bool Element::HasPointerCapture(long aPointerId) {
|
||
PointerCaptureInfo* pointerCaptureInfo =
|
||
PointerEventHandler::GetPointerCaptureInfo(aPointerId);
|
||
if (pointerCaptureInfo && pointerCaptureInfo->mPendingElement == this) {
|
||
return true;
|
||
}
|
||
return false;
|
||
}
|
||
|
||
const nsAttrValue* Element::GetSVGAnimatedClass() const {
|
||
MOZ_ASSERT(MayHaveClass() && IsSVGElement(), "Unexpected call");
|
||
return static_cast<const SVGElement*>(this)->GetAnimatedClassName();
|
||
}
|
||
|
||
NS_IMETHODIMP
|
||
Element::QueryInterface(REFNSIID aIID, void** aInstancePtr) {
|
||
if (aIID.Equals(NS_GET_IID(Element))) {
|
||
NS_ADDREF_THIS();
|
||
*aInstancePtr = this;
|
||
return NS_OK;
|
||
}
|
||
|
||
NS_ASSERTION(aInstancePtr, "QueryInterface requires a non-NULL destination!");
|
||
nsresult rv = FragmentOrElement::QueryInterface(aIID, aInstancePtr);
|
||
if (NS_SUCCEEDED(rv)) {
|
||
return NS_OK;
|
||
}
|
||
|
||
return NS_NOINTERFACE;
|
||
}
|
||
|
||
EventStates Element::IntrinsicState() const {
|
||
return IsEditable() ? NS_EVENT_STATE_READWRITE : NS_EVENT_STATE_READONLY;
|
||
}
|
||
|
||
void Element::NotifyStateChange(EventStates aStates) {
|
||
Document* doc = GetComposedDoc();
|
||
if (doc) {
|
||
nsAutoScriptBlocker scriptBlocker;
|
||
doc->ContentStateChanged(this, aStates);
|
||
}
|
||
}
|
||
|
||
void Element::UpdateLinkState(EventStates aState) {
|
||
MOZ_ASSERT(!aState.HasAtLeastOneOfStates(
|
||
~(NS_EVENT_STATE_VISITED | NS_EVENT_STATE_UNVISITED)),
|
||
"Unexpected link state bits");
|
||
mState =
|
||
(mState & ~(NS_EVENT_STATE_VISITED | NS_EVENT_STATE_UNVISITED)) | aState;
|
||
}
|
||
|
||
void Element::UpdateState(bool aNotify) {
|
||
EventStates oldState = mState;
|
||
mState = IntrinsicState() | (oldState & EXTERNALLY_MANAGED_STATES);
|
||
if (aNotify) {
|
||
EventStates changedStates = oldState ^ mState;
|
||
if (!changedStates.IsEmpty()) {
|
||
Document* doc = GetComposedDoc();
|
||
if (doc) {
|
||
nsAutoScriptBlocker scriptBlocker;
|
||
doc->ContentStateChanged(this, changedStates);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
} // namespace mozilla::dom
|
||
|
||
void nsIContent::UpdateEditableState(bool aNotify) {
|
||
if (IsInNativeAnonymousSubtree()) {
|
||
// Don't propagate the editable flag into native anonymous subtrees.
|
||
if (IsRootOfNativeAnonymousSubtree()) {
|
||
return;
|
||
}
|
||
|
||
// We allow setting the flag on NAC (explicitly, see
|
||
// nsTextControlFrame::CreateAnonymousContent for example), but not
|
||
// unsetting it.
|
||
//
|
||
// Otherwise, just the act of binding the NAC subtree into our non-anonymous
|
||
// parent would clear the flag, which is not good. As we shouldn't move NAC
|
||
// around, this is fine.
|
||
if (HasFlag(NODE_IS_EDITABLE)) {
|
||
return;
|
||
}
|
||
}
|
||
|
||
nsIContent* parent = GetParent();
|
||
SetEditableFlag(parent && parent->HasFlag(NODE_IS_EDITABLE));
|
||
}
|
||
|
||
namespace mozilla::dom {
|
||
|
||
void Element::UpdateEditableState(bool aNotify) {
|
||
nsIContent::UpdateEditableState(aNotify);
|
||
if (aNotify) {
|
||
UpdateState(aNotify);
|
||
} else {
|
||
// Avoid calling UpdateState in this very common case, because
|
||
// this gets called for pretty much every single element on
|
||
// insertion into the document and UpdateState can be slow for
|
||
// some kinds of elements even when not notifying.
|
||
if (IsEditable()) {
|
||
RemoveStatesSilently(NS_EVENT_STATE_READONLY);
|
||
AddStatesSilently(NS_EVENT_STATE_READWRITE);
|
||
} else {
|
||
RemoveStatesSilently(NS_EVENT_STATE_READWRITE);
|
||
AddStatesSilently(NS_EVENT_STATE_READONLY);
|
||
}
|
||
}
|
||
}
|
||
|
||
Maybe<int32_t> Element::GetTabIndexAttrValue() {
|
||
const nsAttrValue* attrVal = GetParsedAttr(nsGkAtoms::tabindex);
|
||
if (attrVal && attrVal->Type() == nsAttrValue::eInteger) {
|
||
return Some(attrVal->GetIntegerValue());
|
||
}
|
||
|
||
return Nothing();
|
||
}
|
||
|
||
int32_t Element::TabIndex() {
|
||
Maybe<int32_t> attrVal = GetTabIndexAttrValue();
|
||
if (attrVal.isSome()) {
|
||
return attrVal.value();
|
||
}
|
||
|
||
return TabIndexDefault();
|
||
}
|
||
|
||
void Element::Focus(const FocusOptions& aOptions, CallerType aCallerType,
|
||
ErrorResult& aError) {
|
||
RefPtr<nsFocusManager> fm = nsFocusManager::GetFocusManager();
|
||
if (!fm) {
|
||
return;
|
||
}
|
||
// Also other browsers seem to have the hack to not re-focus (and flush) when
|
||
// the element is already focused.
|
||
// Until https://github.com/whatwg/html/issues/4512 is clarified, we'll
|
||
// maintain interoperatibility by not re-focusing, independent of aOptions.
|
||
// I.e., `focus({ preventScroll: true})` followed by `focus( { preventScroll:
|
||
// false })` won't re-focus.
|
||
if (fm->CanSkipFocus(this)) {
|
||
fm->NotifyOfReFocus(*this);
|
||
fm->NeedsFlushBeforeEventHandling(this);
|
||
return;
|
||
}
|
||
uint32_t fmFlags = nsFocusManager::ProgrammaticFocusFlags(aOptions);
|
||
if (aCallerType == CallerType::NonSystem) {
|
||
fmFlags |= nsIFocusManager::FLAG_NONSYSTEMCALLER;
|
||
}
|
||
aError = fm->SetFocus(this, fmFlags);
|
||
}
|
||
|
||
void Element::SetTabIndex(int32_t aTabIndex, mozilla::ErrorResult& aError) {
|
||
nsAutoString value;
|
||
value.AppendInt(aTabIndex);
|
||
|
||
SetAttr(nsGkAtoms::tabindex, value, aError);
|
||
}
|
||
|
||
void Element::SetShadowRoot(ShadowRoot* aShadowRoot) {
|
||
nsExtendedDOMSlots* slots = ExtendedDOMSlots();
|
||
MOZ_ASSERT(!aShadowRoot || !slots->mShadowRoot,
|
||
"We shouldn't clear the shadow root without unbind first");
|
||
slots->mShadowRoot = aShadowRoot;
|
||
}
|
||
|
||
void Element::Blur(mozilla::ErrorResult& aError) {
|
||
if (!ShouldBlur(this)) {
|
||
return;
|
||
}
|
||
|
||
Document* doc = GetComposedDoc();
|
||
if (!doc) {
|
||
return;
|
||
}
|
||
|
||
nsPIDOMWindowOuter* win = doc->GetWindow();
|
||
nsFocusManager* fm = nsFocusManager::GetFocusManager();
|
||
if (win && fm) {
|
||
aError = fm->ClearFocus(win);
|
||
}
|
||
}
|
||
|
||
EventStates Element::StyleStateFromLocks() const {
|
||
StyleStateLocks locksAndValues = LockedStyleStates();
|
||
EventStates locks = locksAndValues.mLocks;
|
||
EventStates values = locksAndValues.mValues;
|
||
EventStates state = (mState & ~locks) | (locks & values);
|
||
|
||
if (state.HasState(NS_EVENT_STATE_VISITED)) {
|
||
return state & ~NS_EVENT_STATE_UNVISITED;
|
||
}
|
||
if (state.HasState(NS_EVENT_STATE_UNVISITED)) {
|
||
return state & ~NS_EVENT_STATE_VISITED;
|
||
}
|
||
|
||
return state;
|
||
}
|
||
|
||
Element::StyleStateLocks Element::LockedStyleStates() const {
|
||
StyleStateLocks* locks =
|
||
static_cast<StyleStateLocks*>(GetProperty(nsGkAtoms::lockedStyleStates));
|
||
if (locks) {
|
||
return *locks;
|
||
}
|
||
return StyleStateLocks();
|
||
}
|
||
|
||
void Element::NotifyStyleStateChange(EventStates aStates) {
|
||
Document* doc = GetComposedDoc();
|
||
if (doc) {
|
||
RefPtr<PresShell> presShell = doc->GetPresShell();
|
||
if (presShell) {
|
||
nsAutoScriptBlocker scriptBlocker;
|
||
presShell->ContentStateChanged(doc, this, aStates);
|
||
}
|
||
}
|
||
}
|
||
|
||
void Element::LockStyleStates(EventStates aStates, bool aEnabled) {
|
||
StyleStateLocks* locks = new StyleStateLocks(LockedStyleStates());
|
||
|
||
locks->mLocks |= aStates;
|
||
if (aEnabled) {
|
||
locks->mValues |= aStates;
|
||
} else {
|
||
locks->mValues &= ~aStates;
|
||
}
|
||
|
||
if (aStates.HasState(NS_EVENT_STATE_VISITED)) {
|
||
locks->mLocks &= ~NS_EVENT_STATE_UNVISITED;
|
||
}
|
||
if (aStates.HasState(NS_EVENT_STATE_UNVISITED)) {
|
||
locks->mLocks &= ~NS_EVENT_STATE_VISITED;
|
||
}
|
||
|
||
SetProperty(nsGkAtoms::lockedStyleStates, locks,
|
||
nsINode::DeleteProperty<StyleStateLocks>);
|
||
SetHasLockedStyleStates();
|
||
|
||
NotifyStyleStateChange(aStates);
|
||
}
|
||
|
||
void Element::UnlockStyleStates(EventStates aStates) {
|
||
StyleStateLocks* locks = new StyleStateLocks(LockedStyleStates());
|
||
|
||
locks->mLocks &= ~aStates;
|
||
|
||
if (locks->mLocks.IsEmpty()) {
|
||
RemoveProperty(nsGkAtoms::lockedStyleStates);
|
||
ClearHasLockedStyleStates();
|
||
delete locks;
|
||
} else {
|
||
SetProperty(nsGkAtoms::lockedStyleStates, locks,
|
||
nsINode::DeleteProperty<StyleStateLocks>);
|
||
}
|
||
|
||
NotifyStyleStateChange(aStates);
|
||
}
|
||
|
||
void Element::ClearStyleStateLocks() {
|
||
StyleStateLocks locks = LockedStyleStates();
|
||
|
||
RemoveProperty(nsGkAtoms::lockedStyleStates);
|
||
ClearHasLockedStyleStates();
|
||
|
||
NotifyStyleStateChange(locks.mLocks);
|
||
}
|
||
|
||
/* virtual */
|
||
nsINode* Element::GetScopeChainParent() const { return OwnerDoc(); }
|
||
|
||
nsDOMTokenList* Element::ClassList() {
|
||
Element::nsDOMSlots* slots = DOMSlots();
|
||
|
||
if (!slots->mClassList) {
|
||
slots->mClassList = new nsDOMTokenList(this, nsGkAtoms::_class);
|
||
}
|
||
|
||
return slots->mClassList;
|
||
}
|
||
|
||
nsDOMTokenList* Element::Part() {
|
||
Element::nsDOMSlots* slots = DOMSlots();
|
||
|
||
if (!slots->mPart) {
|
||
slots->mPart = new nsDOMTokenList(this, nsGkAtoms::part);
|
||
}
|
||
|
||
return slots->mPart;
|
||
}
|
||
|
||
void Element::GetAttributeNames(nsTArray<nsString>& aResult) {
|
||
uint32_t count = mAttrs.AttrCount();
|
||
for (uint32_t i = 0; i < count; ++i) {
|
||
const nsAttrName* name = mAttrs.AttrNameAt(i);
|
||
name->GetQualifiedName(*aResult.AppendElement());
|
||
}
|
||
}
|
||
|
||
already_AddRefed<nsIHTMLCollection> Element::GetElementsByTagName(
|
||
const nsAString& aLocalName) {
|
||
return NS_GetContentList(this, kNameSpaceID_Unknown, aLocalName);
|
||
}
|
||
|
||
nsIScrollableFrame* Element::GetScrollFrame(nsIFrame** aFrame,
|
||
FlushType aFlushType) {
|
||
nsIFrame* frame = GetPrimaryFrame(aFlushType);
|
||
if (aFrame) {
|
||
*aFrame = frame;
|
||
}
|
||
if (frame) {
|
||
if (frame->HasAnyStateBits(NS_FRAME_SVG_LAYOUT)) {
|
||
// It's unclear what to return for SVG frames, so just return null.
|
||
return nullptr;
|
||
}
|
||
|
||
// menu frames implement GetScrollTargetFrame but we don't want
|
||
// to use it here. Similar for comboboxes.
|
||
LayoutFrameType type = frame->Type();
|
||
if (type != LayoutFrameType::Menu &&
|
||
type != LayoutFrameType::ComboboxControl) {
|
||
nsIScrollableFrame* scrollFrame = frame->GetScrollTargetFrame();
|
||
if (scrollFrame) {
|
||
MOZ_ASSERT(!OwnerDoc()->IsScrollingElement(this),
|
||
"How can we have a scrollframe if we're the "
|
||
"scrollingElement for our document?");
|
||
return scrollFrame;
|
||
}
|
||
}
|
||
}
|
||
|
||
Document* doc = OwnerDoc();
|
||
// Note: This IsScrollingElement() call can flush frames, if we're the body of
|
||
// a quirks mode document.
|
||
bool isScrollingElement = OwnerDoc()->IsScrollingElement(this);
|
||
// Now reget *aStyledFrame if the caller asked for it, because that frame
|
||
// flush can kill it.
|
||
if (aFrame) {
|
||
*aFrame = GetPrimaryFrame(FlushType::None);
|
||
}
|
||
|
||
if (isScrollingElement) {
|
||
// Our scroll info should map to the root scrollable frame if there is one.
|
||
if (PresShell* presShell = doc->GetPresShell()) {
|
||
return presShell->GetRootScrollFrameAsScrollable();
|
||
}
|
||
}
|
||
|
||
return nullptr;
|
||
}
|
||
|
||
void Element::ScrollIntoView(const BooleanOrScrollIntoViewOptions& aObject) {
|
||
if (aObject.IsScrollIntoViewOptions()) {
|
||
return ScrollIntoView(aObject.GetAsScrollIntoViewOptions());
|
||
}
|
||
|
||
MOZ_DIAGNOSTIC_ASSERT(aObject.IsBoolean());
|
||
|
||
ScrollIntoViewOptions options;
|
||
if (aObject.GetAsBoolean()) {
|
||
options.mBlock = ScrollLogicalPosition::Start;
|
||
options.mInline = ScrollLogicalPosition::Nearest;
|
||
} else {
|
||
options.mBlock = ScrollLogicalPosition::End;
|
||
options.mInline = ScrollLogicalPosition::Nearest;
|
||
}
|
||
return ScrollIntoView(options);
|
||
}
|
||
|
||
void Element::ScrollIntoView(const ScrollIntoViewOptions& aOptions) {
|
||
Document* document = GetComposedDoc();
|
||
if (!document) {
|
||
return;
|
||
}
|
||
|
||
// Get the presentation shell
|
||
RefPtr<PresShell> presShell = document->GetPresShell();
|
||
if (!presShell) {
|
||
return;
|
||
}
|
||
|
||
WhereToScroll whereToScrollVertically = kScrollToCenter;
|
||
switch (aOptions.mBlock) {
|
||
case ScrollLogicalPosition::Start:
|
||
whereToScrollVertically = kScrollToTop;
|
||
break;
|
||
case ScrollLogicalPosition::Center:
|
||
whereToScrollVertically = kScrollToCenter;
|
||
break;
|
||
case ScrollLogicalPosition::End:
|
||
whereToScrollVertically = kScrollToBottom;
|
||
break;
|
||
case ScrollLogicalPosition::Nearest:
|
||
whereToScrollVertically = kScrollMinimum;
|
||
break;
|
||
default:
|
||
MOZ_ASSERT_UNREACHABLE("Unexpected ScrollLogicalPosition value");
|
||
}
|
||
|
||
WhereToScroll whereToScrollHorizontally = kScrollToCenter;
|
||
switch (aOptions.mInline) {
|
||
case ScrollLogicalPosition::Start:
|
||
whereToScrollHorizontally = kScrollToLeft;
|
||
break;
|
||
case ScrollLogicalPosition::Center:
|
||
whereToScrollHorizontally = kScrollToCenter;
|
||
break;
|
||
case ScrollLogicalPosition::End:
|
||
whereToScrollHorizontally = kScrollToRight;
|
||
break;
|
||
case ScrollLogicalPosition::Nearest:
|
||
whereToScrollHorizontally = kScrollMinimum;
|
||
break;
|
||
default:
|
||
MOZ_ASSERT_UNREACHABLE("Unexpected ScrollLogicalPosition value");
|
||
}
|
||
|
||
ScrollFlags scrollFlags =
|
||
ScrollFlags::ScrollOverflowHidden | ScrollFlags::ScrollSnap;
|
||
if (aOptions.mBehavior == ScrollBehavior::Smooth) {
|
||
scrollFlags |= ScrollFlags::ScrollSmooth;
|
||
} else if (aOptions.mBehavior == ScrollBehavior::Auto) {
|
||
scrollFlags |= ScrollFlags::ScrollSmoothAuto;
|
||
}
|
||
|
||
presShell->ScrollContentIntoView(
|
||
this, ScrollAxis(whereToScrollVertically, WhenToScroll::Always),
|
||
ScrollAxis(whereToScrollHorizontally, WhenToScroll::Always), scrollFlags);
|
||
}
|
||
|
||
void Element::Scroll(const CSSIntPoint& aScroll,
|
||
const ScrollOptions& aOptions) {
|
||
nsIScrollableFrame* sf = GetScrollFrame();
|
||
if (sf) {
|
||
ScrollMode scrollMode = sf->IsSmoothScroll(aOptions.mBehavior)
|
||
? ScrollMode::SmoothMsd
|
||
: ScrollMode::Instant;
|
||
|
||
sf->ScrollToCSSPixels(aScroll, scrollMode);
|
||
}
|
||
}
|
||
|
||
void Element::Scroll(double aXScroll, double aYScroll) {
|
||
// Convert -Inf, Inf, and NaN to 0; otherwise, convert by C-style cast.
|
||
auto scrollPos = CSSIntPoint::Truncate(mozilla::ToZeroIfNonfinite(aXScroll),
|
||
mozilla::ToZeroIfNonfinite(aYScroll));
|
||
|
||
Scroll(scrollPos, ScrollOptions());
|
||
}
|
||
|
||
void Element::Scroll(const ScrollToOptions& aOptions) {
|
||
nsIScrollableFrame* sf = GetScrollFrame();
|
||
if (sf) {
|
||
CSSIntPoint scrollPos = sf->GetScrollPositionCSSPixels();
|
||
if (aOptions.mLeft.WasPassed()) {
|
||
scrollPos.x = mozilla::ToZeroIfNonfinite(aOptions.mLeft.Value());
|
||
}
|
||
if (aOptions.mTop.WasPassed()) {
|
||
scrollPos.y = mozilla::ToZeroIfNonfinite(aOptions.mTop.Value());
|
||
}
|
||
Scroll(scrollPos, aOptions);
|
||
}
|
||
}
|
||
|
||
void Element::ScrollTo(double aXScroll, double aYScroll) {
|
||
Scroll(aXScroll, aYScroll);
|
||
}
|
||
|
||
void Element::ScrollTo(const ScrollToOptions& aOptions) { Scroll(aOptions); }
|
||
|
||
void Element::ScrollBy(double aXScrollDif, double aYScrollDif) {
|
||
nsIScrollableFrame* sf = GetScrollFrame();
|
||
if (sf) {
|
||
ScrollToOptions options;
|
||
options.mLeft.Construct(aXScrollDif);
|
||
options.mTop.Construct(aYScrollDif);
|
||
ScrollBy(options);
|
||
}
|
||
}
|
||
|
||
void Element::ScrollBy(const ScrollToOptions& aOptions) {
|
||
nsIScrollableFrame* sf = GetScrollFrame();
|
||
if (sf) {
|
||
CSSIntPoint scrollDelta;
|
||
if (aOptions.mLeft.WasPassed()) {
|
||
scrollDelta.x = mozilla::ToZeroIfNonfinite(aOptions.mLeft.Value());
|
||
}
|
||
if (aOptions.mTop.WasPassed()) {
|
||
scrollDelta.y = mozilla::ToZeroIfNonfinite(aOptions.mTop.Value());
|
||
}
|
||
|
||
ScrollMode scrollMode = sf->IsSmoothScroll(aOptions.mBehavior)
|
||
? ScrollMode::SmoothMsd
|
||
: ScrollMode::Instant;
|
||
|
||
sf->ScrollByCSSPixels(scrollDelta, scrollMode,
|
||
mozilla::ScrollOrigin::Relative);
|
||
}
|
||
}
|
||
|
||
int32_t Element::ScrollTop() {
|
||
nsIScrollableFrame* sf = GetScrollFrame();
|
||
return sf ? sf->GetScrollPositionCSSPixels().y : 0;
|
||
}
|
||
|
||
void Element::SetScrollTop(int32_t aScrollTop) {
|
||
// When aScrollTop is 0, we don't need to flush layout to scroll to that
|
||
// point; we know 0 is always in range. At least we think so... But we do
|
||
// need to flush frames so we ensure we find the right scrollable frame if
|
||
// there is one.
|
||
//
|
||
// If aScrollTop is nonzero, we need to flush layout because we need to figure
|
||
// out what our real scrollTopMax is.
|
||
FlushType flushType = aScrollTop == 0 ? FlushType::Frames : FlushType::Layout;
|
||
nsIScrollableFrame* sf = GetScrollFrame(nullptr, flushType);
|
||
if (sf) {
|
||
ScrollMode scrollMode =
|
||
sf->IsSmoothScroll() ? ScrollMode::SmoothMsd : ScrollMode::Instant;
|
||
|
||
sf->ScrollToCSSPixels(
|
||
CSSIntPoint(sf->GetScrollPositionCSSPixels().x, aScrollTop),
|
||
scrollMode);
|
||
}
|
||
}
|
||
|
||
int32_t Element::ScrollLeft() {
|
||
nsIScrollableFrame* sf = GetScrollFrame();
|
||
return sf ? sf->GetScrollPositionCSSPixels().x : 0;
|
||
}
|
||
|
||
void Element::SetScrollLeft(int32_t aScrollLeft) {
|
||
// We can't assume things here based on the value of aScrollLeft, because
|
||
// depending on our direction and layout 0 may or may not be in our scroll
|
||
// range. So we need to flush layout no matter what.
|
||
nsIScrollableFrame* sf = GetScrollFrame();
|
||
if (sf) {
|
||
ScrollMode scrollMode =
|
||
sf->IsSmoothScroll() ? ScrollMode::SmoothMsd : ScrollMode::Instant;
|
||
|
||
sf->ScrollToCSSPixels(
|
||
CSSIntPoint(aScrollLeft, sf->GetScrollPositionCSSPixels().y),
|
||
scrollMode);
|
||
}
|
||
}
|
||
|
||
void Element::MozScrollSnap() {
|
||
nsIScrollableFrame* sf = GetScrollFrame(nullptr, FlushType::None);
|
||
if (sf) {
|
||
sf->ScrollSnap();
|
||
}
|
||
}
|
||
|
||
int32_t Element::ScrollTopMin() {
|
||
nsIScrollableFrame* sf = GetScrollFrame();
|
||
if (!sf) {
|
||
return 0;
|
||
}
|
||
return CSSPixel::FromAppUnits(sf->GetScrollRange().y).Rounded();
|
||
}
|
||
|
||
int32_t Element::ScrollTopMax() {
|
||
nsIScrollableFrame* sf = GetScrollFrame();
|
||
if (!sf) {
|
||
return 0;
|
||
}
|
||
return CSSPixel::FromAppUnits(sf->GetScrollRange().YMost()).Rounded();
|
||
}
|
||
|
||
int32_t Element::ScrollLeftMin() {
|
||
nsIScrollableFrame* sf = GetScrollFrame();
|
||
if (!sf) {
|
||
return 0;
|
||
}
|
||
return CSSPixel::FromAppUnits(sf->GetScrollRange().x).Rounded();
|
||
}
|
||
|
||
int32_t Element::ScrollLeftMax() {
|
||
nsIScrollableFrame* sf = GetScrollFrame();
|
||
if (!sf) {
|
||
return 0;
|
||
}
|
||
return CSSPixel::FromAppUnits(sf->GetScrollRange().XMost()).Rounded();
|
||
}
|
||
|
||
static nsSize GetScrollRectSizeForOverflowVisibleFrame(nsIFrame* aFrame) {
|
||
if (!aFrame || aFrame->HasAnyStateBits(NS_FRAME_SVG_LAYOUT)) {
|
||
return nsSize(0, 0);
|
||
}
|
||
|
||
nsRect paddingRect = aFrame->GetPaddingRectRelativeToSelf();
|
||
OverflowAreas overflowAreas(paddingRect, paddingRect);
|
||
// Add the scrollable overflow areas of children (if any) to the paddingRect.
|
||
// It's important to start with the paddingRect, otherwise if there are no
|
||
// children the overflow rect will be 0,0,0,0 which will force the point 0,0
|
||
// to be included in the final rect.
|
||
nsLayoutUtils::UnionChildOverflow(aFrame, overflowAreas);
|
||
// Make sure that an empty padding-rect's edges are included, by adding
|
||
// the padding-rect in again with UnionEdges.
|
||
nsRect overflowRect =
|
||
overflowAreas.ScrollableOverflow().UnionEdges(paddingRect);
|
||
return nsLayoutUtils::GetScrolledRect(aFrame, overflowRect,
|
||
paddingRect.Size(),
|
||
aFrame->StyleVisibility()->mDirection)
|
||
.Size();
|
||
}
|
||
|
||
int32_t Element::ScrollHeight() {
|
||
nsIFrame* frame;
|
||
nsIScrollableFrame* sf = GetScrollFrame(&frame);
|
||
nscoord height;
|
||
if (sf) {
|
||
height = sf->GetScrollRange().Height() + sf->GetScrollPortRect().Height();
|
||
} else {
|
||
height = GetScrollRectSizeForOverflowVisibleFrame(frame).height;
|
||
}
|
||
|
||
return nsPresContext::AppUnitsToIntCSSPixels(height);
|
||
}
|
||
|
||
int32_t Element::ScrollWidth() {
|
||
nsIFrame* frame;
|
||
nsIScrollableFrame* sf = GetScrollFrame(&frame);
|
||
nscoord width;
|
||
if (sf) {
|
||
width = sf->GetScrollRange().Width() + sf->GetScrollPortRect().Width();
|
||
} else {
|
||
width = GetScrollRectSizeForOverflowVisibleFrame(frame).width;
|
||
}
|
||
|
||
return nsPresContext::AppUnitsToIntCSSPixels(width);
|
||
}
|
||
|
||
nsRect Element::GetClientAreaRect() {
|
||
Document* doc = OwnerDoc();
|
||
nsPresContext* presContext = doc->GetPresContext();
|
||
|
||
// We can avoid a layout flush if this is the scrolling element of the
|
||
// document, we have overlay scrollbars, and we aren't embedded in another
|
||
// document
|
||
bool overlayScrollbars =
|
||
LookAndFeel::GetInt(LookAndFeel::IntID::UseOverlayScrollbars) != 0;
|
||
bool rootContentDocument =
|
||
presContext && presContext->IsRootContentDocument();
|
||
if (overlayScrollbars && rootContentDocument &&
|
||
doc->IsScrollingElement(this)) {
|
||
// We will always have a pres shell if we have a pres context, and we will
|
||
// only get here if we have a pres context from the root content document
|
||
// check
|
||
PresShell* presShell = doc->GetPresShell();
|
||
|
||
// Ensure up to date dimensions, but don't reflow
|
||
RefPtr<nsViewManager> viewManager = presShell->GetViewManager();
|
||
if (viewManager) {
|
||
viewManager->FlushDelayedResize(false);
|
||
}
|
||
return nsRect(nsPoint(), presContext->GetVisibleArea().Size());
|
||
}
|
||
|
||
nsIFrame* frame;
|
||
if (nsIScrollableFrame* sf = GetScrollFrame(&frame)) {
|
||
nsRect scrollPort = sf->GetScrollPortRect();
|
||
|
||
if (!sf->IsRootScrollFrameOfDocument()) {
|
||
MOZ_ASSERT(frame);
|
||
nsIFrame* scrollableAsFrame = do_QueryFrame(sf);
|
||
// We want the offset to be relative to `frame`, not `sf`... Except for
|
||
// the root scroll frame, which is an ancestor of frame rather than a
|
||
// descendant and thus this wouldn't particularly make sense.
|
||
if (frame != scrollableAsFrame) {
|
||
scrollPort.MoveBy(scrollableAsFrame->GetOffsetTo(frame));
|
||
}
|
||
}
|
||
|
||
// The scroll port value might be expanded to the minimum scale size, we
|
||
// should limit the size to the ICB in such cases.
|
||
scrollPort.SizeTo(sf->GetLayoutSize());
|
||
return scrollPort;
|
||
}
|
||
|
||
if (frame &&
|
||
// The display check is OK even though we're not looking at the style
|
||
// frame, because the style frame only differs from "frame" for tables,
|
||
// and table wrappers have the same display as the table itself.
|
||
(!frame->StyleDisplay()->IsInlineFlow() ||
|
||
frame->IsFrameOfType(nsIFrame::eReplaced))) {
|
||
// Special case code to make client area work even when there isn't
|
||
// a scroll view, see bug 180552, bug 227567.
|
||
return frame->GetPaddingRect() - frame->GetPositionIgnoringScrolling();
|
||
}
|
||
|
||
// SVG nodes reach here and just return 0
|
||
return nsRect(0, 0, 0, 0);
|
||
}
|
||
|
||
already_AddRefed<DOMRect> Element::GetBoundingClientRect() {
|
||
RefPtr<DOMRect> rect = new DOMRect(this);
|
||
|
||
nsIFrame* frame = GetPrimaryFrame(FlushType::Layout);
|
||
if (!frame) {
|
||
// display:none, perhaps? Return the empty rect
|
||
return rect.forget();
|
||
}
|
||
|
||
rect->SetLayoutRect(frame->GetBoundingClientRect());
|
||
return rect.forget();
|
||
}
|
||
|
||
already_AddRefed<DOMRectList> Element::GetClientRects() {
|
||
RefPtr<DOMRectList> rectList = new DOMRectList(this);
|
||
|
||
nsIFrame* frame = GetPrimaryFrame(FlushType::Layout);
|
||
if (!frame) {
|
||
// display:none, perhaps? Return an empty list
|
||
return rectList.forget();
|
||
}
|
||
|
||
nsLayoutUtils::RectListBuilder builder(rectList);
|
||
nsLayoutUtils::GetAllInFlowRects(
|
||
frame, nsLayoutUtils::GetContainingBlockForClientRect(frame), &builder,
|
||
nsLayoutUtils::RECTS_ACCOUNT_FOR_TRANSFORMS);
|
||
return rectList.forget();
|
||
}
|
||
|
||
//----------------------------------------------------------------------
|
||
|
||
void Element::AddToIdTable(nsAtom* aId) {
|
||
NS_ASSERTION(HasID(), "Node doesn't have an ID?");
|
||
if (IsInShadowTree()) {
|
||
ShadowRoot* containingShadow = GetContainingShadow();
|
||
containingShadow->AddToIdTable(this, aId);
|
||
} else {
|
||
Document* doc = GetUncomposedDoc();
|
||
if (doc && !IsInNativeAnonymousSubtree()) {
|
||
doc->AddToIdTable(this, aId);
|
||
}
|
||
}
|
||
}
|
||
|
||
void Element::RemoveFromIdTable() {
|
||
if (!HasID()) {
|
||
return;
|
||
}
|
||
|
||
nsAtom* id = DoGetID();
|
||
if (IsInShadowTree()) {
|
||
ShadowRoot* containingShadow = GetContainingShadow();
|
||
// Check for containingShadow because it may have
|
||
// been deleted during unlinking.
|
||
if (containingShadow) {
|
||
containingShadow->RemoveFromIdTable(this, id);
|
||
}
|
||
} else {
|
||
Document* doc = GetUncomposedDoc();
|
||
if (doc && !IsInNativeAnonymousSubtree()) {
|
||
doc->RemoveFromIdTable(this, id);
|
||
}
|
||
}
|
||
}
|
||
|
||
void Element::SetSlot(const nsAString& aName, ErrorResult& aError) {
|
||
aError = SetAttr(kNameSpaceID_None, nsGkAtoms::slot, aName, true);
|
||
}
|
||
|
||
void Element::GetSlot(nsAString& aName) {
|
||
GetAttr(kNameSpaceID_None, nsGkAtoms::slot, aName);
|
||
}
|
||
|
||
// https://dom.spec.whatwg.org/#dom-element-shadowroot
|
||
ShadowRoot* Element::GetShadowRootByMode() const {
|
||
/**
|
||
* 1. Let shadow be context object's shadow root.
|
||
* 2. If shadow is null or its mode is "closed", then return null.
|
||
*/
|
||
ShadowRoot* shadowRoot = GetShadowRoot();
|
||
if (!shadowRoot || shadowRoot->IsClosed()) {
|
||
return nullptr;
|
||
}
|
||
|
||
/**
|
||
* 3. Return shadow.
|
||
*/
|
||
return shadowRoot;
|
||
}
|
||
|
||
bool Element::CanAttachShadowDOM() const {
|
||
/**
|
||
* If context object's namespace is not the HTML namespace,
|
||
* return false.
|
||
*
|
||
* Deviate from the spec here to allow shadow dom attachement to
|
||
* XUL elements.
|
||
*/
|
||
if (!IsHTMLElement() &&
|
||
!(IsXULElement() &&
|
||
nsContentUtils::AllowXULXBLForPrincipal(NodePrincipal()))) {
|
||
return false;
|
||
}
|
||
|
||
/**
|
||
* If context object's local name is not
|
||
* a valid custom element name, "article", "aside", "blockquote",
|
||
* "body", "div", "footer", "h1", "h2", "h3", "h4", "h5", "h6",
|
||
* "header", "main" "nav", "p", "section", or "span",
|
||
* return false.
|
||
*/
|
||
nsAtom* nameAtom = NodeInfo()->NameAtom();
|
||
uint32_t namespaceID = NodeInfo()->NamespaceID();
|
||
if (!(nsContentUtils::IsCustomElementName(nameAtom, namespaceID) ||
|
||
nameAtom == nsGkAtoms::article || nameAtom == nsGkAtoms::aside ||
|
||
nameAtom == nsGkAtoms::blockquote || nameAtom == nsGkAtoms::body ||
|
||
nameAtom == nsGkAtoms::div || nameAtom == nsGkAtoms::footer ||
|
||
nameAtom == nsGkAtoms::h1 || nameAtom == nsGkAtoms::h2 ||
|
||
nameAtom == nsGkAtoms::h3 || nameAtom == nsGkAtoms::h4 ||
|
||
nameAtom == nsGkAtoms::h5 || nameAtom == nsGkAtoms::h6 ||
|
||
nameAtom == nsGkAtoms::header || nameAtom == nsGkAtoms::main ||
|
||
nameAtom == nsGkAtoms::nav || nameAtom == nsGkAtoms::p ||
|
||
nameAtom == nsGkAtoms::section || nameAtom == nsGkAtoms::span)) {
|
||
return false;
|
||
}
|
||
|
||
/**
|
||
* 3. If context object’s local name is a valid custom element name, or
|
||
* context object’s is value is not null, then:
|
||
* If definition is not null and definition’s disable shadow is true, then
|
||
* return false.
|
||
*/
|
||
// It will always have CustomElementData when the element is a valid custom
|
||
// element or has is value.
|
||
CustomElementData* ceData = GetCustomElementData();
|
||
if (StaticPrefs::dom_webcomponents_formAssociatedCustomElement_enabled() &&
|
||
ceData) {
|
||
CustomElementDefinition* definition = ceData->GetCustomElementDefinition();
|
||
// If the definition is null, the element possible hasn't yet upgraded.
|
||
// Fallback to use LookupCustomElementDefinition to find its definition.
|
||
if (!definition) {
|
||
definition = nsContentUtils::LookupCustomElementDefinition(
|
||
NodeInfo()->GetDocument(), nameAtom, namespaceID,
|
||
ceData->GetCustomElementType());
|
||
}
|
||
|
||
if (definition && definition->mDisableShadow) {
|
||
return false;
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
// https://dom.spec.whatwg.org/#dom-element-attachshadow
|
||
already_AddRefed<ShadowRoot> Element::AttachShadow(const ShadowRootInit& aInit,
|
||
ErrorResult& aError) {
|
||
/**
|
||
* 1. If context object's namespace is not the HTML namespace,
|
||
* then throw a "NotSupportedError" DOMException.
|
||
* 2. If context object's local name is not valid to attach shadow DOM to,
|
||
* then throw a "NotSupportedError" DOMException.
|
||
*/
|
||
if (!CanAttachShadowDOM()) {
|
||
aError.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
|
||
return nullptr;
|
||
}
|
||
|
||
/**
|
||
* 4. If context object is a shadow host, then throw
|
||
* an "NotSupportedError" DOMException.
|
||
*/
|
||
if (GetShadowRoot()) {
|
||
aError.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
|
||
return nullptr;
|
||
}
|
||
|
||
if (StaticPrefs::dom_webcomponents_shadowdom_report_usage()) {
|
||
OwnerDoc()->ReportShadowDOMUsage();
|
||
}
|
||
|
||
return AttachShadowWithoutNameChecks(aInit.mMode);
|
||
}
|
||
|
||
already_AddRefed<ShadowRoot> Element::AttachShadowWithoutNameChecks(
|
||
ShadowRootMode aMode) {
|
||
nsAutoScriptBlocker scriptBlocker;
|
||
|
||
RefPtr<mozilla::dom::NodeInfo> nodeInfo =
|
||
mNodeInfo->NodeInfoManager()->GetNodeInfo(
|
||
nsGkAtoms::documentFragmentNodeName, nullptr, kNameSpaceID_None,
|
||
DOCUMENT_FRAGMENT_NODE);
|
||
|
||
// If there are no children, the flat tree is not changing due to the presence
|
||
// of the shadow root, so we don't need to invalidate style / layout.
|
||
//
|
||
// This is a minor optimization, but also works around nasty stuff like
|
||
// bug 1397876.
|
||
if (HasChildren()) {
|
||
if (Document* doc = GetComposedDoc()) {
|
||
if (PresShell* presShell = doc->GetPresShell()) {
|
||
presShell->DestroyFramesForAndRestyle(this);
|
||
}
|
||
}
|
||
MOZ_ASSERT(!GetPrimaryFrame());
|
||
}
|
||
|
||
/**
|
||
* 4. Let shadow be a new shadow root whose node document is
|
||
* context object's node document, host is context object,
|
||
* and mode is init's mode.
|
||
*/
|
||
auto* nim = nodeInfo->NodeInfoManager();
|
||
RefPtr<ShadowRoot> shadowRoot =
|
||
new (nim) ShadowRoot(this, aMode, nodeInfo.forget());
|
||
|
||
if (NodeOrAncestorHasDirAuto()) {
|
||
shadowRoot->SetAncestorHasDirAuto();
|
||
}
|
||
|
||
/**
|
||
* 5. Set context object's shadow root to shadow.
|
||
*/
|
||
SetShadowRoot(shadowRoot);
|
||
|
||
// Dispatch a "shadowrootattached" event for devtools if needed.
|
||
if (MOZ_UNLIKELY(nim->GetDocument()->ShadowRootAttachedEventEnabled())) {
|
||
AsyncEventDispatcher* dispatcher = new AsyncEventDispatcher(
|
||
this, u"shadowrootattached"_ns, CanBubble::eYes,
|
||
ChromeOnlyDispatch::eYes, Composed::eYes);
|
||
dispatcher->PostDOMEvent();
|
||
}
|
||
|
||
/**
|
||
* 6. Return shadow.
|
||
*/
|
||
return shadowRoot.forget();
|
||
}
|
||
|
||
void Element::AttachAndSetUAShadowRoot(NotifyUAWidgetSetup aNotify) {
|
||
MOZ_DIAGNOSTIC_ASSERT(!CanAttachShadowDOM(),
|
||
"Cannot be used to attach UI shadow DOM");
|
||
if (OwnerDoc()->IsStaticDocument()) {
|
||
return;
|
||
}
|
||
|
||
if (!GetShadowRoot()) {
|
||
RefPtr<ShadowRoot> shadowRoot =
|
||
AttachShadowWithoutNameChecks(ShadowRootMode::Closed);
|
||
shadowRoot->SetIsUAWidget();
|
||
}
|
||
|
||
MOZ_ASSERT(GetShadowRoot()->IsUAWidget());
|
||
if (aNotify == NotifyUAWidgetSetup::Yes) {
|
||
NotifyUAWidgetSetupOrChange();
|
||
}
|
||
}
|
||
|
||
void Element::NotifyUAWidgetSetupOrChange() {
|
||
MOZ_ASSERT(IsInComposedDoc());
|
||
Document* doc = OwnerDoc();
|
||
if (doc->IsStaticDocument()) {
|
||
return;
|
||
}
|
||
|
||
// Schedule a runnable, ensure the event dispatches before
|
||
// returning to content script.
|
||
// This event cause UA Widget to construct or cause onchange callback
|
||
// of existing UA Widget to run; dispatching this event twice should not cause
|
||
// UA Widget to re-init.
|
||
nsContentUtils::AddScriptRunner(NS_NewRunnableFunction(
|
||
"Element::NotifyUAWidgetSetupOrChange::UAWidgetSetupOrChange",
|
||
[self = RefPtr<Element>(this), doc = RefPtr<Document>(doc)]() {
|
||
nsContentUtils::DispatchChromeEvent(doc, self,
|
||
u"UAWidgetSetupOrChange"_ns,
|
||
CanBubble::eYes, Cancelable::eNo);
|
||
}));
|
||
}
|
||
|
||
void Element::NotifyUAWidgetTeardown(UnattachShadowRoot aUnattachShadowRoot) {
|
||
MOZ_ASSERT(IsInComposedDoc());
|
||
if (!GetShadowRoot()) {
|
||
return;
|
||
}
|
||
MOZ_ASSERT(GetShadowRoot()->IsUAWidget());
|
||
if (aUnattachShadowRoot == UnattachShadowRoot::Yes) {
|
||
UnattachShadow();
|
||
}
|
||
|
||
Document* doc = OwnerDoc();
|
||
if (doc->IsStaticDocument()) {
|
||
return;
|
||
}
|
||
|
||
// The runnable will dispatch an event to tear down UA Widget.
|
||
nsContentUtils::AddScriptRunner(NS_NewRunnableFunction(
|
||
"Element::NotifyUAWidgetTeardownAndUnattachShadow::UAWidgetTeardown",
|
||
[self = RefPtr<Element>(this), doc = RefPtr<Document>(doc)]() {
|
||
// Bail out if the element is being collected by CC
|
||
bool hasHadScriptObject = true;
|
||
nsIScriptGlobalObject* scriptObject =
|
||
doc->GetScriptHandlingObject(hasHadScriptObject);
|
||
if (!scriptObject && hasHadScriptObject) {
|
||
return;
|
||
}
|
||
|
||
Unused << nsContentUtils::DispatchChromeEvent(
|
||
doc, self, u"UAWidgetTeardown"_ns, CanBubble::eYes,
|
||
Cancelable::eNo);
|
||
}));
|
||
}
|
||
|
||
void Element::UnattachShadow() {
|
||
ShadowRoot* shadowRoot = GetShadowRoot();
|
||
if (!shadowRoot) {
|
||
return;
|
||
}
|
||
|
||
nsAutoScriptBlocker scriptBlocker;
|
||
|
||
if (Document* doc = GetComposedDoc()) {
|
||
if (PresShell* presShell = doc->GetPresShell()) {
|
||
presShell->DestroyFramesForAndRestyle(this);
|
||
#ifdef ACCESSIBILITY
|
||
// We need to notify the accessibility service here explicitly because,
|
||
// even though we're going to reconstruct the _host_, the shadow root and
|
||
// its children are never really going to come back. We could plumb that
|
||
// further down to DestroyFramesForAndRestyle and add a new flag to
|
||
// nsCSSFrameConstructor::ContentRemoved or such, but this seems simpler
|
||
// instead.
|
||
if (nsAccessibilityService* accService = GetAccService()) {
|
||
accService->ContentRemoved(presShell, shadowRoot);
|
||
}
|
||
#endif
|
||
}
|
||
}
|
||
MOZ_ASSERT(!GetPrimaryFrame());
|
||
|
||
shadowRoot->Unattach();
|
||
SetShadowRoot(nullptr);
|
||
|
||
// Beware shadowRoot could be dead after this call.
|
||
}
|
||
|
||
void Element::GetAttribute(const nsAString& aName, DOMString& aReturn) {
|
||
const nsAttrValue* val = mAttrs.GetAttr(
|
||
aName,
|
||
IsHTMLElement() && IsInHTMLDocument() ? eIgnoreCase : eCaseMatters);
|
||
if (val) {
|
||
val->ToString(aReturn);
|
||
} else {
|
||
if (IsXULElement()) {
|
||
// XXX should be SetDOMStringToNull(aReturn);
|
||
// See bug 232598
|
||
// aReturn is already empty
|
||
} else {
|
||
aReturn.SetNull();
|
||
}
|
||
}
|
||
}
|
||
|
||
bool Element::ToggleAttribute(const nsAString& aName,
|
||
const Optional<bool>& aForce,
|
||
nsIPrincipal* aTriggeringPrincipal,
|
||
ErrorResult& aError) {
|
||
aError = nsContentUtils::CheckQName(aName, false);
|
||
if (aError.Failed()) {
|
||
return false;
|
||
}
|
||
|
||
nsAutoString nameToUse;
|
||
const nsAttrName* name = InternalGetAttrNameFromQName(aName, &nameToUse);
|
||
if (!name) {
|
||
if (aForce.WasPassed() && !aForce.Value()) {
|
||
return false;
|
||
}
|
||
RefPtr<nsAtom> nameAtom = NS_AtomizeMainThread(nameToUse);
|
||
if (!nameAtom) {
|
||
aError.Throw(NS_ERROR_OUT_OF_MEMORY);
|
||
return false;
|
||
}
|
||
aError = SetAttr(kNameSpaceID_None, nameAtom, u""_ns, aTriggeringPrincipal,
|
||
true);
|
||
return true;
|
||
}
|
||
if (aForce.WasPassed() && aForce.Value()) {
|
||
return true;
|
||
}
|
||
// Hold a strong reference here so that the atom or nodeinfo doesn't go
|
||
// away during UnsetAttr. If it did UnsetAttr would be left with a
|
||
// dangling pointer as argument without knowing it.
|
||
nsAttrName tmp(*name);
|
||
|
||
aError = UnsetAttr(name->NamespaceID(), name->LocalName(), true);
|
||
return false;
|
||
}
|
||
|
||
void Element::SetAttribute(const nsAString& aName, const nsAString& aValue,
|
||
nsIPrincipal* aTriggeringPrincipal,
|
||
ErrorResult& aError) {
|
||
aError = nsContentUtils::CheckQName(aName, false);
|
||
if (aError.Failed()) {
|
||
return;
|
||
}
|
||
|
||
nsAutoString nameToUse;
|
||
const nsAttrName* name = InternalGetAttrNameFromQName(aName, &nameToUse);
|
||
if (!name) {
|
||
RefPtr<nsAtom> nameAtom = NS_AtomizeMainThread(nameToUse);
|
||
if (!nameAtom) {
|
||
aError.Throw(NS_ERROR_OUT_OF_MEMORY);
|
||
return;
|
||
}
|
||
aError = SetAttr(kNameSpaceID_None, nameAtom, aValue, aTriggeringPrincipal,
|
||
true);
|
||
return;
|
||
}
|
||
|
||
aError = SetAttr(name->NamespaceID(), name->LocalName(), name->GetPrefix(),
|
||
aValue, aTriggeringPrincipal, true);
|
||
}
|
||
|
||
void Element::RemoveAttribute(const nsAString& aName, ErrorResult& aError) {
|
||
const nsAttrName* name = InternalGetAttrNameFromQName(aName);
|
||
|
||
if (!name) {
|
||
// If there is no canonical nsAttrName for this attribute name, then the
|
||
// attribute does not exist and we can't get its namespace ID and
|
||
// local name below, so we return early.
|
||
return;
|
||
}
|
||
|
||
// Hold a strong reference here so that the atom or nodeinfo doesn't go
|
||
// away during UnsetAttr. If it did UnsetAttr would be left with a
|
||
// dangling pointer as argument without knowing it.
|
||
nsAttrName tmp(*name);
|
||
|
||
aError = UnsetAttr(name->NamespaceID(), name->LocalName(), true);
|
||
}
|
||
|
||
Attr* Element::GetAttributeNode(const nsAString& aName) {
|
||
return Attributes()->GetNamedItem(aName);
|
||
}
|
||
|
||
already_AddRefed<Attr> Element::SetAttributeNode(Attr& aNewAttr,
|
||
ErrorResult& aError) {
|
||
return Attributes()->SetNamedItemNS(aNewAttr, aError);
|
||
}
|
||
|
||
already_AddRefed<Attr> Element::RemoveAttributeNode(Attr& aAttribute,
|
||
ErrorResult& aError) {
|
||
Element* elem = aAttribute.GetElement();
|
||
if (elem != this) {
|
||
aError.Throw(NS_ERROR_DOM_NOT_FOUND_ERR);
|
||
return nullptr;
|
||
}
|
||
|
||
nsAutoString nameSpaceURI;
|
||
aAttribute.NodeInfo()->GetNamespaceURI(nameSpaceURI);
|
||
return Attributes()->RemoveNamedItemNS(
|
||
nameSpaceURI, aAttribute.NodeInfo()->LocalName(), aError);
|
||
}
|
||
|
||
void Element::GetAttributeNS(const nsAString& aNamespaceURI,
|
||
const nsAString& aLocalName, nsAString& aReturn) {
|
||
int32_t nsid = nsContentUtils::NameSpaceManager()->GetNameSpaceID(
|
||
aNamespaceURI, nsContentUtils::IsChromeDoc(OwnerDoc()));
|
||
|
||
if (nsid == kNameSpaceID_Unknown) {
|
||
// Unknown namespace means no attribute.
|
||
SetDOMStringToNull(aReturn);
|
||
return;
|
||
}
|
||
|
||
RefPtr<nsAtom> name = NS_AtomizeMainThread(aLocalName);
|
||
bool hasAttr = GetAttr(nsid, name, aReturn);
|
||
if (!hasAttr) {
|
||
SetDOMStringToNull(aReturn);
|
||
}
|
||
}
|
||
|
||
void Element::SetAttributeNS(const nsAString& aNamespaceURI,
|
||
const nsAString& aQualifiedName,
|
||
const nsAString& aValue,
|
||
nsIPrincipal* aTriggeringPrincipal,
|
||
ErrorResult& aError) {
|
||
RefPtr<mozilla::dom::NodeInfo> ni;
|
||
aError = nsContentUtils::GetNodeInfoFromQName(
|
||
aNamespaceURI, aQualifiedName, mNodeInfo->NodeInfoManager(),
|
||
ATTRIBUTE_NODE, getter_AddRefs(ni));
|
||
if (aError.Failed()) {
|
||
return;
|
||
}
|
||
|
||
aError = SetAttr(ni->NamespaceID(), ni->NameAtom(), ni->GetPrefixAtom(),
|
||
aValue, aTriggeringPrincipal, true);
|
||
}
|
||
|
||
already_AddRefed<nsIPrincipal> Element::CreateDevtoolsPrincipal() {
|
||
// Return an ExpandedPrincipal that subsumes this Element's Principal,
|
||
// and expands this Element's CSP to allow the actions that devtools
|
||
// needs to perform.
|
||
AutoTArray<nsCOMPtr<nsIPrincipal>, 1> allowList = {NodePrincipal()};
|
||
RefPtr<ExpandedPrincipal> dtPrincipal = ExpandedPrincipal::Create(
|
||
allowList, NodePrincipal()->OriginAttributesRef());
|
||
|
||
if (nsIContentSecurityPolicy* csp = GetCsp()) {
|
||
RefPtr<nsCSPContext> dtCsp = new nsCSPContext();
|
||
dtCsp->InitFromOther(static_cast<nsCSPContext*>(csp));
|
||
dtCsp->SetSkipAllowInlineStyleCheck(true);
|
||
|
||
dtPrincipal->SetCsp(dtCsp);
|
||
}
|
||
|
||
return dtPrincipal.forget();
|
||
}
|
||
|
||
void Element::SetAttributeDevtools(const nsAString& aName,
|
||
const nsAString& aValue,
|
||
ErrorResult& aError) {
|
||
// Run this through SetAttribute with a devtools-ready principal.
|
||
RefPtr<nsIPrincipal> dtPrincipal = CreateDevtoolsPrincipal();
|
||
SetAttribute(aName, aValue, dtPrincipal, aError);
|
||
}
|
||
|
||
void Element::SetAttributeDevtoolsNS(const nsAString& aNamespaceURI,
|
||
const nsAString& aLocalName,
|
||
const nsAString& aValue,
|
||
ErrorResult& aError) {
|
||
// Run this through SetAttributeNS with a devtools-ready principal.
|
||
RefPtr<nsIPrincipal> dtPrincipal = CreateDevtoolsPrincipal();
|
||
SetAttributeNS(aNamespaceURI, aLocalName, aValue, dtPrincipal, aError);
|
||
}
|
||
|
||
void Element::RemoveAttributeNS(const nsAString& aNamespaceURI,
|
||
const nsAString& aLocalName,
|
||
ErrorResult& aError) {
|
||
RefPtr<nsAtom> name = NS_AtomizeMainThread(aLocalName);
|
||
int32_t nsid = nsContentUtils::NameSpaceManager()->GetNameSpaceID(
|
||
aNamespaceURI, nsContentUtils::IsChromeDoc(OwnerDoc()));
|
||
|
||
if (nsid == kNameSpaceID_Unknown) {
|
||
// If the namespace ID is unknown, it means there can't possibly be an
|
||
// existing attribute. We would need a known namespace ID to pass into
|
||
// UnsetAttr, so we return early if we don't have one.
|
||
return;
|
||
}
|
||
|
||
aError = UnsetAttr(nsid, name, true);
|
||
}
|
||
|
||
Attr* Element::GetAttributeNodeNS(const nsAString& aNamespaceURI,
|
||
const nsAString& aLocalName) {
|
||
return GetAttributeNodeNSInternal(aNamespaceURI, aLocalName);
|
||
}
|
||
|
||
Attr* Element::GetAttributeNodeNSInternal(const nsAString& aNamespaceURI,
|
||
const nsAString& aLocalName) {
|
||
return Attributes()->GetNamedItemNS(aNamespaceURI, aLocalName);
|
||
}
|
||
|
||
already_AddRefed<Attr> Element::SetAttributeNodeNS(Attr& aNewAttr,
|
||
ErrorResult& aError) {
|
||
return Attributes()->SetNamedItemNS(aNewAttr, aError);
|
||
}
|
||
|
||
already_AddRefed<nsIHTMLCollection> Element::GetElementsByTagNameNS(
|
||
const nsAString& aNamespaceURI, const nsAString& aLocalName,
|
||
ErrorResult& aError) {
|
||
int32_t nameSpaceId = kNameSpaceID_Wildcard;
|
||
|
||
if (!aNamespaceURI.EqualsLiteral("*")) {
|
||
aError = nsContentUtils::NameSpaceManager()->RegisterNameSpace(
|
||
aNamespaceURI, nameSpaceId);
|
||
if (aError.Failed()) {
|
||
return nullptr;
|
||
}
|
||
}
|
||
|
||
NS_ASSERTION(nameSpaceId != kNameSpaceID_Unknown, "Unexpected namespace ID!");
|
||
|
||
return NS_GetContentList(this, nameSpaceId, aLocalName);
|
||
}
|
||
|
||
bool Element::HasAttributeNS(const nsAString& aNamespaceURI,
|
||
const nsAString& aLocalName) const {
|
||
int32_t nsid = nsContentUtils::NameSpaceManager()->GetNameSpaceID(
|
||
aNamespaceURI, nsContentUtils::IsChromeDoc(OwnerDoc()));
|
||
|
||
if (nsid == kNameSpaceID_Unknown) {
|
||
// Unknown namespace means no attr...
|
||
return false;
|
||
}
|
||
|
||
RefPtr<nsAtom> name = NS_AtomizeMainThread(aLocalName);
|
||
return HasAttr(nsid, name);
|
||
}
|
||
|
||
already_AddRefed<nsIHTMLCollection> Element::GetElementsByClassName(
|
||
const nsAString& aClassNames) {
|
||
return nsContentUtils::GetElementsByClassName(this, aClassNames);
|
||
}
|
||
|
||
void Element::GetElementsWithGrid(nsTArray<RefPtr<Element>>& aElements) {
|
||
nsINode* cur = this;
|
||
while (cur) {
|
||
if (cur->IsElement()) {
|
||
Element* elem = cur->AsElement();
|
||
|
||
if (elem->GetPrimaryFrame()) {
|
||
// See if this has a GridContainerFrame. Use the same method that
|
||
// nsGridContainerFrame uses, which deals with some edge cases.
|
||
if (nsGridContainerFrame::GetGridContainerFrame(
|
||
elem->GetPrimaryFrame())) {
|
||
aElements.AppendElement(elem);
|
||
}
|
||
|
||
// This element has a frame, so allow the traversal to go through
|
||
// the children.
|
||
cur = cur->GetNextNode(this);
|
||
continue;
|
||
}
|
||
}
|
||
|
||
// Either this isn't an element, or it has no frame. Continue with the
|
||
// traversal but ignore all the children.
|
||
cur = cur->GetNextNonChildNode(this);
|
||
}
|
||
}
|
||
|
||
bool Element::HasVisibleScrollbars() {
|
||
nsIScrollableFrame* scrollFrame = GetScrollFrame();
|
||
return scrollFrame && (!scrollFrame->GetScrollbarVisibility().isEmpty());
|
||
}
|
||
|
||
nsresult Element::BindToTree(BindContext& aContext, nsINode& aParent) {
|
||
MOZ_ASSERT(aParent.IsContent() || aParent.IsDocument(),
|
||
"Must have content or document parent!");
|
||
MOZ_ASSERT(aParent.OwnerDoc() == OwnerDoc(),
|
||
"Must have the same owner document");
|
||
MOZ_ASSERT(OwnerDoc() == &aContext.OwnerDoc(), "These should match too");
|
||
MOZ_ASSERT(!IsInUncomposedDoc(), "Already have a document. Unbind first!");
|
||
MOZ_ASSERT(!IsInComposedDoc(), "Already have a document. Unbind first!");
|
||
// Note that as we recurse into the kids, they'll have a non-null parent. So
|
||
// only assert if our parent is _changing_ while we have a parent.
|
||
MOZ_ASSERT(!GetParentNode() || &aParent == GetParentNode(),
|
||
"Already have a parent. Unbind first!");
|
||
|
||
const bool hadParent = !!GetParentNode();
|
||
|
||
if (aParent.IsInNativeAnonymousSubtree()) {
|
||
SetFlags(NODE_IS_IN_NATIVE_ANONYMOUS_SUBTREE);
|
||
}
|
||
if (aParent.HasFlag(NODE_HAS_BEEN_IN_UA_WIDGET)) {
|
||
SetFlags(NODE_HAS_BEEN_IN_UA_WIDGET);
|
||
}
|
||
if (IsRootOfNativeAnonymousSubtree()) {
|
||
aParent.SetMayHaveAnonymousChildren();
|
||
}
|
||
|
||
// Now set the parent.
|
||
mParent = &aParent;
|
||
if (!hadParent && aParent.IsContent()) {
|
||
SetParentIsContent(true);
|
||
NS_ADDREF(mParent);
|
||
}
|
||
MOZ_ASSERT(!!GetParent() == aParent.IsContent());
|
||
|
||
MOZ_ASSERT(!HasAnyOfFlags(Element::kAllServoDescendantBits));
|
||
|
||
// Finally, set the document
|
||
if (aParent.IsInUncomposedDoc() || aParent.IsInShadowTree()) {
|
||
// We no longer need to track the subtree pointer (and in fact we'll assert
|
||
// if we do this any later).
|
||
ClearSubtreeRootPointer();
|
||
SetIsConnected(aParent.IsInComposedDoc());
|
||
|
||
if (aParent.IsInUncomposedDoc()) {
|
||
SetIsInDocument();
|
||
} else {
|
||
SetFlags(NODE_IS_IN_SHADOW_TREE);
|
||
MOZ_ASSERT(aParent.IsContent() &&
|
||
aParent.AsContent()->GetContainingShadow());
|
||
ExtendedDOMSlots()->mContainingShadow =
|
||
aParent.AsContent()->GetContainingShadow();
|
||
}
|
||
// Clear the lazy frame construction bits.
|
||
UnsetFlags(NODE_NEEDS_FRAME | NODE_DESCENDANTS_NEED_FRAMES);
|
||
} else {
|
||
// If we're not in the doc and not in a shadow tree,
|
||
// update our subtree pointer.
|
||
SetSubtreeRootPointer(aParent.SubtreeRoot());
|
||
}
|
||
|
||
if (IsInComposedDoc()) {
|
||
// Connected callback must be enqueued whenever a custom element becomes
|
||
// connected.
|
||
if (CustomElementData* data = GetCustomElementData()) {
|
||
if (data->mState == CustomElementData::State::eCustom) {
|
||
nsContentUtils::EnqueueLifecycleCallback(
|
||
ElementCallbackType::eConnected, this);
|
||
} else {
|
||
// Step 7.7.2.2 https://dom.spec.whatwg.org/#concept-node-insert
|
||
nsContentUtils::TryToUpgradeElement(this);
|
||
}
|
||
}
|
||
}
|
||
|
||
// This has to be here, rather than in nsGenericHTMLElement::BindToTree,
|
||
// because it has to happen after updating the parent pointer, but before
|
||
// recursively binding the kids.
|
||
if (IsHTMLElement()) {
|
||
SetDirOnBind(this, nsIContent::FromNode(aParent));
|
||
}
|
||
|
||
UpdateEditableState(false);
|
||
|
||
// Call BindToTree on shadow root children.
|
||
nsresult rv;
|
||
if (ShadowRoot* shadowRoot = GetShadowRoot()) {
|
||
rv = shadowRoot->Bind();
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
}
|
||
|
||
// Now recurse into our kids. Ensure this happens after binding the shadow
|
||
// root so that directionality of slots is updated.
|
||
{
|
||
for (nsIContent* child = GetFirstChild(); child;
|
||
child = child->GetNextSibling()) {
|
||
rv = child->BindToTree(aContext, *this);
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
}
|
||
}
|
||
|
||
MutationObservers::NotifyParentChainChanged(this);
|
||
if (!hadParent && IsRootOfNativeAnonymousSubtree()) {
|
||
MutationObservers::NotifyNativeAnonymousChildListChange(this, false);
|
||
}
|
||
|
||
// Ensure we only run this once, in the case we move the ShadowRoot around.
|
||
if (aContext.SubtreeRootChanges()) {
|
||
if (HasPartAttribute()) {
|
||
if (ShadowRoot* shadow = GetContainingShadow()) {
|
||
shadow->PartAdded(*this);
|
||
}
|
||
}
|
||
if (HasID()) {
|
||
AddToIdTable(DoGetID());
|
||
}
|
||
HandleShadowDOMRelatedInsertionSteps(hadParent);
|
||
}
|
||
|
||
if (MayHaveStyle()) {
|
||
// If MayHaveStyle() is true, we must be an nsStyledElement.
|
||
static_cast<nsStyledElement*>(this)->ReparseStyleAttribute(
|
||
/* aForceInDataDoc = */ false);
|
||
}
|
||
|
||
// FIXME(emilio): Why is this needed? The element shouldn't even be styled in
|
||
// the first place, we should style it properly eventually.
|
||
//
|
||
// Also, if this _is_ needed, then it's wrong and should use GetComposedDoc()
|
||
// to account for Shadow DOM.
|
||
if (aParent.IsInUncomposedDoc() && MayHaveAnimations()) {
|
||
PseudoStyleType pseudoType = GetPseudoElementType();
|
||
if ((pseudoType == PseudoStyleType::NotPseudo ||
|
||
pseudoType == PseudoStyleType::before ||
|
||
pseudoType == PseudoStyleType::after ||
|
||
pseudoType == PseudoStyleType::marker) &&
|
||
EffectSet::GetEffectSet(this, pseudoType)) {
|
||
if (nsPresContext* presContext = aContext.OwnerDoc().GetPresContext()) {
|
||
presContext->EffectCompositor()->RequestRestyle(
|
||
this, pseudoType, EffectCompositor::RestyleType::Standard,
|
||
EffectCompositor::CascadeLevel::Animations);
|
||
}
|
||
}
|
||
}
|
||
|
||
// XXXbz script execution during binding can trigger some of these
|
||
// postcondition asserts.... But we do want that, since things will
|
||
// generally be quite broken when that happens.
|
||
MOZ_ASSERT(OwnerDoc() == aParent.OwnerDoc(), "Bound to wrong document");
|
||
MOZ_ASSERT(IsInComposedDoc() == aContext.InComposedDoc());
|
||
MOZ_ASSERT(IsInUncomposedDoc() == aContext.InUncomposedDoc());
|
||
MOZ_ASSERT(&aParent == GetParentNode(), "Bound to wrong parent node");
|
||
MOZ_ASSERT(aParent.IsInUncomposedDoc() == IsInUncomposedDoc());
|
||
MOZ_ASSERT(aParent.IsInComposedDoc() == IsInComposedDoc());
|
||
MOZ_ASSERT(aParent.IsInShadowTree() == IsInShadowTree());
|
||
MOZ_ASSERT(aParent.SubtreeRoot() == SubtreeRoot());
|
||
return NS_OK;
|
||
}
|
||
|
||
bool WillDetachFromShadowOnUnbind(const Element& aElement, bool aNullParent) {
|
||
// If our parent still is in a shadow tree by now, and we're not removing
|
||
// ourselves from it, then we're still going to be in a shadow tree after
|
||
// this.
|
||
return aElement.IsInShadowTree() &&
|
||
(aNullParent || !aElement.GetParent()->IsInShadowTree());
|
||
}
|
||
|
||
void Element::UnbindFromTree(bool aNullParent) {
|
||
HandleShadowDOMRelatedRemovalSteps(aNullParent);
|
||
|
||
const bool detachingFromShadow =
|
||
WillDetachFromShadowOnUnbind(*this, aNullParent);
|
||
// Make sure to only remove from the ID table if our subtree root is actually
|
||
// changing.
|
||
if (IsInUncomposedDoc() || detachingFromShadow) {
|
||
RemoveFromIdTable();
|
||
}
|
||
|
||
if (detachingFromShadow && HasPartAttribute()) {
|
||
if (ShadowRoot* shadow = GetContainingShadow()) {
|
||
shadow->PartRemoved(*this);
|
||
}
|
||
}
|
||
|
||
// Make sure to unbind this node before doing the kids
|
||
Document* document = GetComposedDoc();
|
||
|
||
if (HasPointerLock()) {
|
||
PointerLockManager::Unlock();
|
||
}
|
||
if (mState.HasState(NS_EVENT_STATE_FULLSCREEN)) {
|
||
// The element being removed is an ancestor of the fullscreen element,
|
||
// exit fullscreen state.
|
||
nsContentUtils::ReportToConsole(nsIScriptError::warningFlag, "DOM"_ns,
|
||
OwnerDoc(), nsContentUtils::eDOM_PROPERTIES,
|
||
"RemovedFullscreenElement");
|
||
// Fully exit fullscreen.
|
||
Document::ExitFullscreenInDocTree(OwnerDoc());
|
||
}
|
||
|
||
if (HasServoData()) {
|
||
MOZ_ASSERT(document);
|
||
MOZ_ASSERT(IsInNativeAnonymousSubtree());
|
||
}
|
||
|
||
if (document) {
|
||
ClearServoData(document);
|
||
}
|
||
|
||
if (aNullParent) {
|
||
if (IsRootOfNativeAnonymousSubtree()) {
|
||
MutationObservers::NotifyNativeAnonymousChildListChange(this, true);
|
||
}
|
||
|
||
if (GetParent()) {
|
||
RefPtr<nsINode> p;
|
||
p.swap(mParent);
|
||
} else {
|
||
mParent = nullptr;
|
||
}
|
||
SetParentIsContent(false);
|
||
}
|
||
|
||
#ifdef DEBUG
|
||
// If we can get access to the PresContext, then we sanity-check that
|
||
// we're not leaving behind a pointer to ourselves as the PresContext's
|
||
// cached provider of the viewport's scrollbar styles.
|
||
if (document) {
|
||
nsPresContext* presContext = document->GetPresContext();
|
||
if (presContext) {
|
||
MOZ_ASSERT(this != presContext->GetViewportScrollStylesOverrideElement(),
|
||
"Leaving behind a raw pointer to this element (as having "
|
||
"propagated scrollbar styles) - that's dangerous...");
|
||
}
|
||
}
|
||
|
||
# ifdef ACCESSIBILITY
|
||
MOZ_ASSERT(!GetAccService() || !GetAccService()->HasAccessible(this),
|
||
"An accessible for this element still exists!");
|
||
# endif
|
||
#endif
|
||
|
||
// Ensure that CSS transitions don't continue on an element at a
|
||
// different place in the tree (even if reinserted before next
|
||
// animation refresh).
|
||
//
|
||
// We need to delete the properties while we're still in document
|
||
// (if we were in document) so that they can look up the
|
||
// PendingAnimationTracker on the document and remove their animations,
|
||
// and so they can find their pres context for dispatching cancel events.
|
||
//
|
||
// FIXME (Bug 522599): Need a test for this.
|
||
if (MayHaveAnimations()) {
|
||
RemoveProperty(nsGkAtoms::transitionsOfBeforeProperty);
|
||
RemoveProperty(nsGkAtoms::transitionsOfAfterProperty);
|
||
RemoveProperty(nsGkAtoms::transitionsOfMarkerProperty);
|
||
RemoveProperty(nsGkAtoms::transitionsProperty);
|
||
RemoveProperty(nsGkAtoms::animationsOfBeforeProperty);
|
||
RemoveProperty(nsGkAtoms::animationsOfAfterProperty);
|
||
RemoveProperty(nsGkAtoms::animationsOfMarkerProperty);
|
||
RemoveProperty(nsGkAtoms::animationsProperty);
|
||
if (document) {
|
||
if (nsPresContext* presContext = document->GetPresContext()) {
|
||
// We have to clear all pending restyle requests for the animations on
|
||
// this element to avoid unnecessary restyles when we re-attached this
|
||
// element.
|
||
presContext->EffectCompositor()->ClearRestyleRequestsFor(this);
|
||
}
|
||
}
|
||
}
|
||
|
||
ClearInDocument();
|
||
SetIsConnected(false);
|
||
if (HasElementCreatedFromPrototypeAndHasUnmodifiedL10n()) {
|
||
if (document) {
|
||
document->mL10nProtoElements.Remove(this);
|
||
}
|
||
ClearElementCreatedFromPrototypeAndHasUnmodifiedL10n();
|
||
}
|
||
|
||
if (aNullParent || !mParent->IsInShadowTree()) {
|
||
UnsetFlags(NODE_IS_IN_SHADOW_TREE);
|
||
|
||
// Begin keeping track of our subtree root.
|
||
SetSubtreeRootPointer(aNullParent ? this : mParent->SubtreeRoot());
|
||
}
|
||
|
||
if (nsExtendedDOMSlots* slots = GetExistingExtendedDOMSlots()) {
|
||
if (aNullParent || !mParent->IsInShadowTree()) {
|
||
slots->mContainingShadow = nullptr;
|
||
}
|
||
}
|
||
|
||
if (document) {
|
||
// Disconnected must be enqueued whenever a connected custom element becomes
|
||
// disconnected.
|
||
CustomElementData* data = GetCustomElementData();
|
||
if (data) {
|
||
if (data->mState == CustomElementData::State::eCustom) {
|
||
nsContentUtils::EnqueueLifecycleCallback(
|
||
ElementCallbackType::eDisconnected, this);
|
||
} else {
|
||
// Remove an unresolved custom element that is a candidate for upgrade
|
||
// when a custom element is disconnected.
|
||
nsContentUtils::UnregisterUnresolvedElement(this);
|
||
}
|
||
}
|
||
}
|
||
|
||
// This has to be here, rather than in nsGenericHTMLElement::UnbindFromTree,
|
||
// because it has to happen after unsetting the parent pointer, but before
|
||
// recursively unbinding the kids.
|
||
if (IsHTMLElement()) {
|
||
ResetDir(this);
|
||
}
|
||
|
||
for (nsIContent* child = GetFirstChild(); child;
|
||
child = child->GetNextSibling()) {
|
||
// Note that we pass false for aNullParent here, since we don't want
|
||
// the kids to forget us.
|
||
child->UnbindFromTree(false);
|
||
}
|
||
|
||
MutationObservers::NotifyParentChainChanged(this);
|
||
|
||
// Unbind children of shadow root.
|
||
if (ShadowRoot* shadowRoot = GetShadowRoot()) {
|
||
shadowRoot->Unbind();
|
||
}
|
||
|
||
MOZ_ASSERT(!HasAnyOfFlags(kAllServoDescendantBits));
|
||
MOZ_ASSERT(!document || document->GetServoRestyleRoot() != this);
|
||
}
|
||
|
||
UniquePtr<SMILAttr> Element::GetAnimatedAttr(int32_t aNamespaceID,
|
||
nsAtom* aName) {
|
||
return nullptr;
|
||
}
|
||
|
||
nsDOMCSSAttributeDeclaration* Element::SMILOverrideStyle() {
|
||
Element::nsExtendedDOMSlots* slots = ExtendedDOMSlots();
|
||
|
||
if (!slots->mSMILOverrideStyle) {
|
||
slots->mSMILOverrideStyle = new nsDOMCSSAttributeDeclaration(this, true);
|
||
}
|
||
|
||
return slots->mSMILOverrideStyle;
|
||
}
|
||
|
||
DeclarationBlock* Element::GetSMILOverrideStyleDeclaration() {
|
||
Element::nsExtendedDOMSlots* slots = GetExistingExtendedDOMSlots();
|
||
return slots ? slots->mSMILOverrideStyleDeclaration.get() : nullptr;
|
||
}
|
||
|
||
void Element::SetSMILOverrideStyleDeclaration(DeclarationBlock& aDeclaration) {
|
||
ExtendedDOMSlots()->mSMILOverrideStyleDeclaration = &aDeclaration;
|
||
|
||
// Only need to request a restyle if we're in a document. (We might not
|
||
// be in a document, if we're clearing animation effects on a target node
|
||
// that's been detached since the previous animation sample.)
|
||
if (Document* doc = GetComposedDoc()) {
|
||
if (PresShell* presShell = doc->GetPresShell()) {
|
||
presShell->RestyleForAnimation(this, RestyleHint::RESTYLE_SMIL);
|
||
}
|
||
}
|
||
}
|
||
|
||
bool Element::IsLabelable() const { return false; }
|
||
|
||
bool Element::IsInteractiveHTMLContent() const { return false; }
|
||
|
||
DeclarationBlock* Element::GetInlineStyleDeclaration() const {
|
||
if (!MayHaveStyle()) {
|
||
return nullptr;
|
||
}
|
||
const nsAttrValue* attrVal = mAttrs.GetAttr(nsGkAtoms::style);
|
||
|
||
if (attrVal && attrVal->Type() == nsAttrValue::eCSSDeclaration) {
|
||
return attrVal->GetCSSDeclarationValue();
|
||
}
|
||
|
||
return nullptr;
|
||
}
|
||
|
||
const nsMappedAttributes* Element::GetMappedAttributes() const {
|
||
return mAttrs.GetMapped();
|
||
}
|
||
|
||
void Element::InlineStyleDeclarationWillChange(MutationClosureData& aData) {
|
||
MOZ_ASSERT_UNREACHABLE("Element::InlineStyleDeclarationWillChange");
|
||
}
|
||
|
||
nsresult Element::SetInlineStyleDeclaration(DeclarationBlock& aDeclaration,
|
||
MutationClosureData& aData) {
|
||
MOZ_ASSERT_UNREACHABLE("Element::SetInlineStyleDeclaration");
|
||
return NS_ERROR_NOT_IMPLEMENTED;
|
||
}
|
||
|
||
NS_IMETHODIMP_(bool)
|
||
Element::IsAttributeMapped(const nsAtom* aAttribute) const { return false; }
|
||
|
||
nsChangeHint Element::GetAttributeChangeHint(const nsAtom* aAttribute,
|
||
int32_t aModType) const {
|
||
return nsChangeHint(0);
|
||
}
|
||
|
||
bool Element::FindAttributeDependence(const nsAtom* aAttribute,
|
||
const MappedAttributeEntry* const aMaps[],
|
||
uint32_t aMapCount) {
|
||
for (uint32_t mapindex = 0; mapindex < aMapCount; ++mapindex) {
|
||
for (const MappedAttributeEntry* map = aMaps[mapindex]; map->attribute;
|
||
++map) {
|
||
if (aAttribute == map->attribute) {
|
||
return true;
|
||
}
|
||
}
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
already_AddRefed<mozilla::dom::NodeInfo> Element::GetExistingAttrNameFromQName(
|
||
const nsAString& aStr) const {
|
||
const nsAttrName* name = InternalGetAttrNameFromQName(aStr);
|
||
if (!name) {
|
||
return nullptr;
|
||
}
|
||
|
||
RefPtr<mozilla::dom::NodeInfo> nodeInfo;
|
||
if (name->IsAtom()) {
|
||
nodeInfo = mNodeInfo->NodeInfoManager()->GetNodeInfo(
|
||
name->Atom(), nullptr, kNameSpaceID_None, ATTRIBUTE_NODE);
|
||
} else {
|
||
nodeInfo = name->NodeInfo();
|
||
}
|
||
|
||
return nodeInfo.forget();
|
||
}
|
||
|
||
// static
|
||
bool Element::ShouldBlur(nsIContent* aContent) {
|
||
// Determine if the current element is focused, if it is not focused
|
||
// then we should not try to blur
|
||
Document* document = aContent->GetComposedDoc();
|
||
if (!document) return false;
|
||
|
||
nsCOMPtr<nsPIDOMWindowOuter> window = document->GetWindow();
|
||
if (!window) return false;
|
||
|
||
nsCOMPtr<nsPIDOMWindowOuter> focusedFrame;
|
||
nsIContent* contentToBlur = nsFocusManager::GetFocusedDescendant(
|
||
window, nsFocusManager::eOnlyCurrentWindow, getter_AddRefs(focusedFrame));
|
||
if (contentToBlur == aContent) return true;
|
||
|
||
// if focus on this element would get redirected, then check the redirected
|
||
// content as well when blurring.
|
||
return (contentToBlur &&
|
||
nsFocusManager::GetRedirectedFocus(aContent) == contentToBlur);
|
||
}
|
||
|
||
bool Element::IsNodeOfType(uint32_t aFlags) const { return false; }
|
||
|
||
/* static */
|
||
nsresult Element::DispatchEvent(nsPresContext* aPresContext,
|
||
WidgetEvent* aEvent, nsIContent* aTarget,
|
||
bool aFullDispatch, nsEventStatus* aStatus) {
|
||
MOZ_ASSERT(aTarget, "Must have target");
|
||
MOZ_ASSERT(aEvent, "Must have source event");
|
||
MOZ_ASSERT(aStatus, "Null out param?");
|
||
|
||
if (!aPresContext) {
|
||
return NS_OK;
|
||
}
|
||
|
||
RefPtr<PresShell> presShell = aPresContext->GetPresShell();
|
||
if (!presShell) {
|
||
return NS_OK;
|
||
}
|
||
|
||
if (aFullDispatch) {
|
||
return presShell->HandleEventWithTarget(aEvent, nullptr, aTarget, aStatus);
|
||
}
|
||
|
||
return presShell->HandleDOMEventWithTarget(aTarget, aEvent, aStatus);
|
||
}
|
||
|
||
/* static */
|
||
nsresult Element::DispatchClickEvent(nsPresContext* aPresContext,
|
||
WidgetInputEvent* aSourceEvent,
|
||
nsIContent* aTarget, bool aFullDispatch,
|
||
const EventFlags* aExtraEventFlags,
|
||
nsEventStatus* aStatus) {
|
||
MOZ_ASSERT(aTarget, "Must have target");
|
||
MOZ_ASSERT(aSourceEvent, "Must have source event");
|
||
MOZ_ASSERT(aStatus, "Null out param?");
|
||
|
||
WidgetMouseEvent event(aSourceEvent->IsTrusted(), eMouseClick,
|
||
aSourceEvent->mWidget, WidgetMouseEvent::eReal);
|
||
event.mRefPoint = aSourceEvent->mRefPoint;
|
||
uint32_t clickCount = 1;
|
||
float pressure = 0;
|
||
uint32_t pointerId = 0; // Use the default value here.
|
||
uint16_t inputSource = 0;
|
||
WidgetMouseEvent* sourceMouseEvent = aSourceEvent->AsMouseEvent();
|
||
if (sourceMouseEvent) {
|
||
clickCount = sourceMouseEvent->mClickCount;
|
||
pressure = sourceMouseEvent->mPressure;
|
||
pointerId = sourceMouseEvent->pointerId;
|
||
inputSource = sourceMouseEvent->mInputSource;
|
||
} else if (aSourceEvent->mClass == eKeyboardEventClass) {
|
||
event.mFlags.mIsPositionless = true;
|
||
inputSource = MouseEvent_Binding::MOZ_SOURCE_KEYBOARD;
|
||
}
|
||
event.mPressure = pressure;
|
||
event.mClickCount = clickCount;
|
||
event.pointerId = pointerId;
|
||
event.mInputSource = inputSource;
|
||
event.mModifiers = aSourceEvent->mModifiers;
|
||
if (aExtraEventFlags) {
|
||
// Be careful not to overwrite existing flags!
|
||
event.mFlags.Union(*aExtraEventFlags);
|
||
}
|
||
|
||
return DispatchEvent(aPresContext, &event, aTarget, aFullDispatch, aStatus);
|
||
}
|
||
|
||
//----------------------------------------------------------------------
|
||
nsresult Element::LeaveLink(nsPresContext* aPresContext) {
|
||
if (!aPresContext || !aPresContext->Document()->LinkHandlingEnabled()) {
|
||
return NS_OK;
|
||
}
|
||
nsIDocShell* shell = aPresContext->Document()->GetDocShell();
|
||
if (!shell) {
|
||
return NS_OK;
|
||
}
|
||
return nsDocShell::Cast(shell)->OnLeaveLink();
|
||
}
|
||
|
||
void Element::SetEventHandler(nsAtom* aEventName, const nsAString& aValue,
|
||
bool aDefer) {
|
||
Document* ownerDoc = OwnerDoc();
|
||
if (ownerDoc->IsLoadedAsData()) {
|
||
// Make this a no-op rather than throwing an error to avoid
|
||
// the error causing problems setting the attribute.
|
||
return;
|
||
}
|
||
|
||
MOZ_ASSERT(aEventName, "Must have event name!");
|
||
bool defer = true;
|
||
EventListenerManager* manager =
|
||
GetEventListenerManagerForAttr(aEventName, &defer);
|
||
if (!manager) {
|
||
return;
|
||
}
|
||
|
||
defer = defer && aDefer; // only defer if everyone agrees...
|
||
manager->SetEventHandler(aEventName, aValue, defer,
|
||
!nsContentUtils::IsChromeDoc(ownerDoc), this);
|
||
}
|
||
|
||
//----------------------------------------------------------------------
|
||
|
||
const nsAttrName* Element::InternalGetAttrNameFromQName(
|
||
const nsAString& aStr, nsAutoString* aNameToUse) const {
|
||
MOZ_ASSERT(!aNameToUse || aNameToUse->IsEmpty());
|
||
const nsAttrName* val = nullptr;
|
||
if (IsHTMLElement() && IsInHTMLDocument()) {
|
||
nsAutoString lower;
|
||
nsAutoString& outStr = aNameToUse ? *aNameToUse : lower;
|
||
nsContentUtils::ASCIIToLower(aStr, outStr);
|
||
val = mAttrs.GetExistingAttrNameFromQName(outStr);
|
||
if (val) {
|
||
outStr.Truncate();
|
||
}
|
||
} else {
|
||
val = mAttrs.GetExistingAttrNameFromQName(aStr);
|
||
if (!val && aNameToUse) {
|
||
*aNameToUse = aStr;
|
||
}
|
||
}
|
||
|
||
return val;
|
||
}
|
||
|
||
bool Element::MaybeCheckSameAttrVal(int32_t aNamespaceID, const nsAtom* aName,
|
||
const nsAtom* aPrefix,
|
||
const nsAttrValueOrString& aValue,
|
||
bool aNotify, nsAttrValue& aOldValue,
|
||
uint8_t* aModType, bool* aHasListeners,
|
||
bool* aOldValueSet) {
|
||
bool modification = false;
|
||
*aHasListeners =
|
||
aNotify && nsContentUtils::HasMutationListeners(
|
||
this, NS_EVENT_BITS_MUTATION_ATTRMODIFIED, this);
|
||
*aOldValueSet = false;
|
||
|
||
// If we have no listeners and aNotify is false, we are almost certainly
|
||
// coming from the content sink and will almost certainly have no previous
|
||
// value. Even if we do, setting the value is cheap when we have no
|
||
// listeners and don't plan to notify. The check for aNotify here is an
|
||
// optimization, the check for *aHasListeners is a correctness issue.
|
||
if (*aHasListeners || aNotify) {
|
||
BorrowedAttrInfo info(GetAttrInfo(aNamespaceID, aName));
|
||
if (info.mValue) {
|
||
// Check whether the old value is the same as the new one. Note that we
|
||
// only need to actually _get_ the old value if we have listeners or
|
||
// if the element is a custom element (because it may have an
|
||
// attribute changed callback).
|
||
if (*aHasListeners || GetCustomElementData()) {
|
||
// Need to store the old value.
|
||
//
|
||
// If the current attribute value contains a pointer to some other data
|
||
// structure that gets updated in the process of setting the attribute
|
||
// we'll no longer have the old value of the attribute. Therefore, we
|
||
// should serialize the attribute value now to keep a snapshot.
|
||
//
|
||
// We have to serialize the value anyway in order to create the
|
||
// mutation event so there's no cost in doing it now.
|
||
aOldValue.SetToSerialized(*info.mValue);
|
||
*aOldValueSet = true;
|
||
}
|
||
bool valueMatches = aValue.EqualsAsStrings(*info.mValue);
|
||
if (valueMatches && aPrefix == info.mName->GetPrefix()) {
|
||
return true;
|
||
}
|
||
modification = true;
|
||
}
|
||
}
|
||
*aModType = modification
|
||
? static_cast<uint8_t>(MutationEvent_Binding::MODIFICATION)
|
||
: static_cast<uint8_t>(MutationEvent_Binding::ADDITION);
|
||
return false;
|
||
}
|
||
|
||
bool Element::OnlyNotifySameValueSet(int32_t aNamespaceID, nsAtom* aName,
|
||
nsAtom* aPrefix,
|
||
const nsAttrValueOrString& aValue,
|
||
bool aNotify, nsAttrValue& aOldValue,
|
||
uint8_t* aModType, bool* aHasListeners,
|
||
bool* aOldValueSet) {
|
||
if (!MaybeCheckSameAttrVal(aNamespaceID, aName, aPrefix, aValue, aNotify,
|
||
aOldValue, aModType, aHasListeners,
|
||
aOldValueSet)) {
|
||
return false;
|
||
}
|
||
|
||
nsAutoScriptBlocker scriptBlocker;
|
||
MutationObservers::NotifyAttributeSetToCurrentValue(this, aNamespaceID,
|
||
aName);
|
||
return true;
|
||
}
|
||
|
||
nsresult Element::SetSingleClassFromParser(nsAtom* aSingleClassName) {
|
||
// Keep this in sync with SetAttr and SetParsedAttr below.
|
||
|
||
nsAttrValue value(aSingleClassName);
|
||
|
||
Document* document = GetComposedDoc();
|
||
mozAutoDocUpdate updateBatch(document, false);
|
||
|
||
// In principle, BeforeSetAttr should be called here if a node type
|
||
// existed that wanted to do something special for class, but there
|
||
// is no such node type, so calling SetMayHaveClass() directly.
|
||
SetMayHaveClass();
|
||
|
||
return SetAttrAndNotify(kNameSpaceID_None, nsGkAtoms::_class,
|
||
nullptr, // prefix
|
||
nullptr, // old value
|
||
value, nullptr,
|
||
static_cast<uint8_t>(MutationEvent_Binding::ADDITION),
|
||
false, // hasListeners
|
||
false, // notify
|
||
kCallAfterSetAttr, document, updateBatch);
|
||
}
|
||
|
||
nsresult Element::SetAttr(int32_t aNamespaceID, nsAtom* aName, nsAtom* aPrefix,
|
||
const nsAString& aValue,
|
||
nsIPrincipal* aSubjectPrincipal, bool aNotify) {
|
||
// Keep this in sync with SetParsedAttr below and SetSingleClassFromParser
|
||
// above.
|
||
|
||
NS_ENSURE_ARG_POINTER(aName);
|
||
NS_ASSERTION(aNamespaceID != kNameSpaceID_Unknown,
|
||
"Don't call SetAttr with unknown namespace");
|
||
|
||
uint8_t modType;
|
||
bool hasListeners;
|
||
nsAttrValueOrString value(aValue);
|
||
nsAttrValue oldValue;
|
||
bool oldValueSet;
|
||
|
||
if (OnlyNotifySameValueSet(aNamespaceID, aName, aPrefix, value, aNotify,
|
||
oldValue, &modType, &hasListeners, &oldValueSet)) {
|
||
return OnAttrSetButNotChanged(aNamespaceID, aName, value, aNotify);
|
||
}
|
||
|
||
// Hold a script blocker while calling ParseAttribute since that can call
|
||
// out to id-observers
|
||
Document* document = GetComposedDoc();
|
||
mozAutoDocUpdate updateBatch(document, aNotify);
|
||
|
||
if (aNotify) {
|
||
MutationObservers::NotifyAttributeWillChange(this, aNamespaceID, aName,
|
||
modType);
|
||
}
|
||
|
||
nsresult rv = BeforeSetAttr(aNamespaceID, aName, &value, aNotify);
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
|
||
nsAttrValue attrValue;
|
||
if (!ParseAttribute(aNamespaceID, aName, aValue, aSubjectPrincipal,
|
||
attrValue)) {
|
||
attrValue.SetTo(aValue);
|
||
}
|
||
|
||
PreIdMaybeChange(aNamespaceID, aName, &value);
|
||
|
||
return SetAttrAndNotify(aNamespaceID, aName, aPrefix,
|
||
oldValueSet ? &oldValue : nullptr, attrValue,
|
||
aSubjectPrincipal, modType, hasListeners, aNotify,
|
||
kCallAfterSetAttr, document, updateBatch);
|
||
}
|
||
|
||
nsresult Element::SetParsedAttr(int32_t aNamespaceID, nsAtom* aName,
|
||
nsAtom* aPrefix, nsAttrValue& aParsedValue,
|
||
bool aNotify) {
|
||
// Keep this in sync with SetAttr and SetSingleClassFromParser above
|
||
|
||
NS_ENSURE_ARG_POINTER(aName);
|
||
NS_ASSERTION(aNamespaceID != kNameSpaceID_Unknown,
|
||
"Don't call SetAttr with unknown namespace");
|
||
|
||
uint8_t modType;
|
||
bool hasListeners;
|
||
nsAttrValueOrString value(aParsedValue);
|
||
nsAttrValue oldValue;
|
||
bool oldValueSet;
|
||
|
||
if (OnlyNotifySameValueSet(aNamespaceID, aName, aPrefix, value, aNotify,
|
||
oldValue, &modType, &hasListeners, &oldValueSet)) {
|
||
return OnAttrSetButNotChanged(aNamespaceID, aName, value, aNotify);
|
||
}
|
||
|
||
Document* document = GetComposedDoc();
|
||
mozAutoDocUpdate updateBatch(document, aNotify);
|
||
|
||
if (aNotify) {
|
||
MutationObservers::NotifyAttributeWillChange(this, aNamespaceID, aName,
|
||
modType);
|
||
}
|
||
|
||
nsresult rv = BeforeSetAttr(aNamespaceID, aName, &value, aNotify);
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
|
||
PreIdMaybeChange(aNamespaceID, aName, &value);
|
||
|
||
return SetAttrAndNotify(aNamespaceID, aName, aPrefix,
|
||
oldValueSet ? &oldValue : nullptr, aParsedValue,
|
||
nullptr, modType, hasListeners, aNotify,
|
||
kCallAfterSetAttr, document, updateBatch);
|
||
}
|
||
|
||
nsresult Element::SetAttrAndNotify(
|
||
int32_t aNamespaceID, nsAtom* aName, nsAtom* aPrefix,
|
||
const nsAttrValue* aOldValue, nsAttrValue& aParsedValue,
|
||
nsIPrincipal* aSubjectPrincipal, uint8_t aModType, bool aFireMutation,
|
||
bool aNotify, bool aCallAfterSetAttr, Document* aComposedDocument,
|
||
const mozAutoDocUpdate&) {
|
||
nsresult rv;
|
||
nsMutationGuard::DidMutate();
|
||
|
||
// Copy aParsedValue for later use since it will be lost when we call
|
||
// SetAndSwapMappedAttr below
|
||
nsAttrValue valueForAfterSetAttr;
|
||
if (aCallAfterSetAttr || GetCustomElementData()) {
|
||
valueForAfterSetAttr.SetTo(aParsedValue);
|
||
}
|
||
|
||
bool hadValidDir = false;
|
||
bool hadDirAuto = false;
|
||
bool oldValueSet;
|
||
|
||
if (aNamespaceID == kNameSpaceID_None) {
|
||
if (aName == nsGkAtoms::dir) {
|
||
hadValidDir = HasValidDir() || IsHTMLElement(nsGkAtoms::bdi);
|
||
hadDirAuto = HasDirAuto(); // already takes bdi into account
|
||
}
|
||
|
||
// XXXbz Perhaps we should push up the attribute mapping function
|
||
// stuff to Element?
|
||
if (!IsAttributeMapped(aName) ||
|
||
!SetAndSwapMappedAttribute(aName, aParsedValue, &oldValueSet, &rv)) {
|
||
rv = mAttrs.SetAndSwapAttr(aName, aParsedValue, &oldValueSet);
|
||
}
|
||
} else {
|
||
RefPtr<mozilla::dom::NodeInfo> ni;
|
||
ni = mNodeInfo->NodeInfoManager()->GetNodeInfo(aName, aPrefix, aNamespaceID,
|
||
ATTRIBUTE_NODE);
|
||
|
||
rv = mAttrs.SetAndSwapAttr(ni, aParsedValue, &oldValueSet);
|
||
}
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
|
||
PostIdMaybeChange(aNamespaceID, aName, &valueForAfterSetAttr);
|
||
|
||
// If the old value owns its own data, we know it is OK to keep using it.
|
||
// oldValue will be null if there was no previously set value
|
||
const nsAttrValue* oldValue;
|
||
if (aParsedValue.StoresOwnData()) {
|
||
if (oldValueSet) {
|
||
oldValue = &aParsedValue;
|
||
} else {
|
||
oldValue = nullptr;
|
||
}
|
||
} else {
|
||
// No need to conditionally assign null here. If there was no previously
|
||
// set value for the attribute, aOldValue will already be null.
|
||
oldValue = aOldValue;
|
||
}
|
||
|
||
if (HasElementCreatedFromPrototypeAndHasUnmodifiedL10n() &&
|
||
aNamespaceID == kNameSpaceID_None &&
|
||
(aName == nsGkAtoms::datal10nid || aName == nsGkAtoms::datal10nargs)) {
|
||
ClearElementCreatedFromPrototypeAndHasUnmodifiedL10n();
|
||
if (aComposedDocument) {
|
||
aComposedDocument->mL10nProtoElements.Remove(this);
|
||
}
|
||
}
|
||
|
||
const CustomElementData* data = GetCustomElementData();
|
||
if (data && data->mState == CustomElementData::State::eCustom) {
|
||
CustomElementDefinition* definition = data->GetCustomElementDefinition();
|
||
MOZ_ASSERT(definition, "Should have a valid CustomElementDefinition");
|
||
|
||
if (definition->IsInObservedAttributeList(aName)) {
|
||
RefPtr<nsAtom> oldValueAtom;
|
||
if (oldValue) {
|
||
oldValueAtom = oldValue->GetAsAtom();
|
||
} else {
|
||
// If there is no old value, get the value of the uninitialized
|
||
// attribute that was swapped with aParsedValue.
|
||
oldValueAtom = aParsedValue.GetAsAtom();
|
||
}
|
||
RefPtr<nsAtom> newValueAtom = valueForAfterSetAttr.GetAsAtom();
|
||
nsAutoString ns;
|
||
nsContentUtils::NameSpaceManager()->GetNameSpaceURI(aNamespaceID, ns);
|
||
|
||
LifecycleCallbackArgs args = {nsDependentAtomString(aName),
|
||
aModType == MutationEvent_Binding::ADDITION
|
||
? VoidString()
|
||
: nsDependentAtomString(oldValueAtom),
|
||
nsDependentAtomString(newValueAtom),
|
||
(ns.IsEmpty() ? VoidString() : ns)};
|
||
|
||
nsContentUtils::EnqueueLifecycleCallback(
|
||
ElementCallbackType::eAttributeChanged, this, &args, nullptr,
|
||
definition);
|
||
}
|
||
}
|
||
|
||
if (aCallAfterSetAttr) {
|
||
rv = AfterSetAttr(aNamespaceID, aName, &valueForAfterSetAttr, oldValue,
|
||
aSubjectPrincipal, aNotify);
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
|
||
if (aNamespaceID == kNameSpaceID_None && aName == nsGkAtoms::dir) {
|
||
OnSetDirAttr(this, &valueForAfterSetAttr, hadValidDir, hadDirAuto,
|
||
aNotify);
|
||
}
|
||
}
|
||
|
||
UpdateState(aNotify);
|
||
|
||
if (aNotify) {
|
||
// Don't pass aOldValue to AttributeChanged since it may not be reliable.
|
||
// Callers only compute aOldValue under certain conditions which may not
|
||
// be triggered by all nsIMutationObservers.
|
||
MutationObservers::NotifyAttributeChanged(
|
||
this, aNamespaceID, aName, aModType,
|
||
aParsedValue.StoresOwnData() ? &aParsedValue : nullptr);
|
||
}
|
||
|
||
if (aFireMutation) {
|
||
InternalMutationEvent mutation(true, eLegacyAttrModified);
|
||
|
||
nsAutoString ns;
|
||
nsContentUtils::NameSpaceManager()->GetNameSpaceURI(aNamespaceID, ns);
|
||
Attr* attrNode =
|
||
GetAttributeNodeNSInternal(ns, nsDependentAtomString(aName));
|
||
mutation.mRelatedNode = attrNode;
|
||
|
||
mutation.mAttrName = aName;
|
||
nsAutoString newValue;
|
||
GetAttr(aNamespaceID, aName, newValue);
|
||
if (!newValue.IsEmpty()) {
|
||
mutation.mNewAttrValue = NS_Atomize(newValue);
|
||
}
|
||
if (oldValue && !oldValue->IsEmptyString()) {
|
||
mutation.mPrevAttrValue = oldValue->GetAsAtom();
|
||
}
|
||
mutation.mAttrChange = aModType;
|
||
|
||
mozAutoSubtreeModified subtree(OwnerDoc(), this);
|
||
(new AsyncEventDispatcher(this, mutation))->RunDOMEventWhenSafe();
|
||
}
|
||
|
||
return NS_OK;
|
||
}
|
||
|
||
bool Element::ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute,
|
||
const nsAString& aValue,
|
||
nsIPrincipal* aMaybeScriptedPrincipal,
|
||
nsAttrValue& aResult) {
|
||
if (aAttribute == nsGkAtoms::lang) {
|
||
aResult.ParseAtom(aValue);
|
||
return true;
|
||
}
|
||
|
||
if (aNamespaceID == kNameSpaceID_None) {
|
||
if (aAttribute == nsGkAtoms::_class || aAttribute == nsGkAtoms::part) {
|
||
aResult.ParseAtomArray(aValue);
|
||
return true;
|
||
}
|
||
|
||
if (aAttribute == nsGkAtoms::exportparts) {
|
||
aResult.ParsePartMapping(aValue);
|
||
return true;
|
||
}
|
||
|
||
if (aAttribute == nsGkAtoms::id) {
|
||
// Store id as an atom. id="" means that the element has no id,
|
||
// not that it has an emptystring as the id.
|
||
if (aValue.IsEmpty()) {
|
||
return false;
|
||
}
|
||
aResult.ParseAtom(aValue);
|
||
return true;
|
||
}
|
||
}
|
||
|
||
return false;
|
||
}
|
||
|
||
bool Element::SetAndSwapMappedAttribute(nsAtom* aName, nsAttrValue& aValue,
|
||
bool* aValueWasSet, nsresult* aRetval) {
|
||
*aRetval = NS_OK;
|
||
return false;
|
||
}
|
||
|
||
nsresult Element::BeforeSetAttr(int32_t aNamespaceID, nsAtom* aName,
|
||
const nsAttrValueOrString* aValue,
|
||
bool aNotify) {
|
||
if (aNamespaceID == kNameSpaceID_None) {
|
||
if (aName == nsGkAtoms::_class && aValue) {
|
||
// Note: This flag is asymmetrical. It is never unset and isn't exact.
|
||
// If it is ever made to be exact, we probably need to handle this
|
||
// similarly to how ids are handled in PreIdMaybeChange and
|
||
// PostIdMaybeChange.
|
||
// Note that SetSingleClassFromParser inlines BeforeSetAttr and
|
||
// calls SetMayHaveClass directly. Making a subclass take action
|
||
// on the class attribute in a BeforeSetAttr override would
|
||
// require revising SetSingleClassFromParser.
|
||
SetMayHaveClass();
|
||
}
|
||
}
|
||
|
||
return NS_OK;
|
||
}
|
||
|
||
nsresult Element::AfterSetAttr(int32_t aNamespaceID, nsAtom* aName,
|
||
const nsAttrValue* aValue,
|
||
const nsAttrValue* aOldValue,
|
||
nsIPrincipal* aMaybeScriptedPrincipal,
|
||
bool aNotify) {
|
||
if (aNamespaceID == kNameSpaceID_None) {
|
||
if (aName == nsGkAtoms::part) {
|
||
bool isPart = !!aValue;
|
||
if (HasPartAttribute() != isPart) {
|
||
SetHasPartAttribute(isPart);
|
||
if (ShadowRoot* shadow = GetContainingShadow()) {
|
||
if (isPart) {
|
||
shadow->PartAdded(*this);
|
||
} else {
|
||
shadow->PartRemoved(*this);
|
||
}
|
||
}
|
||
}
|
||
MOZ_ASSERT(HasPartAttribute() == isPart);
|
||
} else if (aName == nsGkAtoms::slot && GetParent()) {
|
||
if (ShadowRoot* shadow = GetParent()->GetShadowRoot()) {
|
||
shadow->MaybeReassignElement(*this);
|
||
}
|
||
}
|
||
}
|
||
return NS_OK;
|
||
}
|
||
|
||
void Element::PreIdMaybeChange(int32_t aNamespaceID, nsAtom* aName,
|
||
const nsAttrValueOrString* aValue) {
|
||
if (aNamespaceID != kNameSpaceID_None || aName != nsGkAtoms::id) {
|
||
return;
|
||
}
|
||
RemoveFromIdTable();
|
||
}
|
||
|
||
void Element::PostIdMaybeChange(int32_t aNamespaceID, nsAtom* aName,
|
||
const nsAttrValue* aValue) {
|
||
if (aNamespaceID != kNameSpaceID_None || aName != nsGkAtoms::id) {
|
||
return;
|
||
}
|
||
|
||
// id="" means that the element has no id, not that it has an empty
|
||
// string as the id.
|
||
if (aValue && !aValue->IsEmptyString()) {
|
||
SetHasID();
|
||
AddToIdTable(aValue->GetAtomValue());
|
||
} else {
|
||
ClearHasID();
|
||
}
|
||
}
|
||
|
||
nsresult Element::OnAttrSetButNotChanged(int32_t aNamespaceID, nsAtom* aName,
|
||
const nsAttrValueOrString& aValue,
|
||
bool aNotify) {
|
||
const CustomElementData* data = GetCustomElementData();
|
||
if (data && data->mState == CustomElementData::State::eCustom) {
|
||
CustomElementDefinition* definition = data->GetCustomElementDefinition();
|
||
MOZ_ASSERT(definition, "Should have a valid CustomElementDefinition");
|
||
|
||
if (definition->IsInObservedAttributeList(aName)) {
|
||
nsAutoString ns;
|
||
nsContentUtils::NameSpaceManager()->GetNameSpaceURI(aNamespaceID, ns);
|
||
|
||
nsAutoString value(aValue.String());
|
||
LifecycleCallbackArgs args = {nsDependentAtomString(aName), value, value,
|
||
(ns.IsEmpty() ? VoidString() : ns)};
|
||
|
||
nsContentUtils::EnqueueLifecycleCallback(
|
||
ElementCallbackType::eAttributeChanged, this, &args, nullptr,
|
||
definition);
|
||
}
|
||
}
|
||
|
||
return NS_OK;
|
||
}
|
||
|
||
EventListenerManager* Element::GetEventListenerManagerForAttr(nsAtom* aAttrName,
|
||
bool* aDefer) {
|
||
*aDefer = true;
|
||
return GetOrCreateListenerManager();
|
||
}
|
||
|
||
bool Element::GetAttr(int32_t aNameSpaceID, const nsAtom* aName,
|
||
nsAString& aResult) const {
|
||
DOMString str;
|
||
bool haveAttr = GetAttr(aNameSpaceID, aName, str);
|
||
str.ToString(aResult);
|
||
return haveAttr;
|
||
}
|
||
|
||
int32_t Element::FindAttrValueIn(int32_t aNameSpaceID, const nsAtom* aName,
|
||
AttrValuesArray* aValues,
|
||
nsCaseTreatment aCaseSensitive) const {
|
||
NS_ASSERTION(aName, "Must have attr name");
|
||
NS_ASSERTION(aNameSpaceID != kNameSpaceID_Unknown, "Must have namespace");
|
||
NS_ASSERTION(aValues, "Null value array");
|
||
|
||
const nsAttrValue* val = mAttrs.GetAttr(aName, aNameSpaceID);
|
||
if (val) {
|
||
for (int32_t i = 0; aValues[i]; ++i) {
|
||
if (val->Equals(aValues[i], aCaseSensitive)) {
|
||
return i;
|
||
}
|
||
}
|
||
return ATTR_VALUE_NO_MATCH;
|
||
}
|
||
return ATTR_MISSING;
|
||
}
|
||
|
||
nsresult Element::UnsetAttr(int32_t aNameSpaceID, nsAtom* aName, bool aNotify) {
|
||
NS_ASSERTION(nullptr != aName, "must have attribute name");
|
||
|
||
int32_t index = mAttrs.IndexOfAttr(aName, aNameSpaceID);
|
||
if (index < 0) {
|
||
return NS_OK;
|
||
}
|
||
|
||
Document* document = GetComposedDoc();
|
||
mozAutoDocUpdate updateBatch(document, aNotify);
|
||
|
||
if (aNotify) {
|
||
MutationObservers::NotifyAttributeWillChange(
|
||
this, aNameSpaceID, aName, MutationEvent_Binding::REMOVAL);
|
||
}
|
||
|
||
nsresult rv = BeforeSetAttr(aNameSpaceID, aName, nullptr, aNotify);
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
|
||
bool hasMutationListeners =
|
||
aNotify && nsContentUtils::HasMutationListeners(
|
||
this, NS_EVENT_BITS_MUTATION_ATTRMODIFIED, this);
|
||
|
||
PreIdMaybeChange(aNameSpaceID, aName, nullptr);
|
||
|
||
// Grab the attr node if needed before we remove it from the attr map
|
||
RefPtr<Attr> attrNode;
|
||
if (hasMutationListeners) {
|
||
nsAutoString ns;
|
||
nsContentUtils::NameSpaceManager()->GetNameSpaceURI(aNameSpaceID, ns);
|
||
attrNode = GetAttributeNodeNSInternal(ns, nsDependentAtomString(aName));
|
||
}
|
||
|
||
// Clear the attribute out from attribute map.
|
||
nsDOMSlots* slots = GetExistingDOMSlots();
|
||
if (slots && slots->mAttributeMap) {
|
||
slots->mAttributeMap->DropAttribute(aNameSpaceID, aName);
|
||
}
|
||
|
||
// The id-handling code, and in the future possibly other code, need to
|
||
// react to unexpected attribute changes.
|
||
nsMutationGuard::DidMutate();
|
||
|
||
bool hadValidDir = false;
|
||
bool hadDirAuto = false;
|
||
|
||
if (aNameSpaceID == kNameSpaceID_None && aName == nsGkAtoms::dir) {
|
||
hadValidDir = HasValidDir() || IsHTMLElement(nsGkAtoms::bdi);
|
||
hadDirAuto = HasDirAuto(); // already takes bdi into account
|
||
}
|
||
|
||
nsAttrValue oldValue;
|
||
rv = mAttrs.RemoveAttrAt(index, oldValue);
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
|
||
PostIdMaybeChange(aNameSpaceID, aName, nullptr);
|
||
|
||
const CustomElementData* data = GetCustomElementData();
|
||
if (data && data->mState == CustomElementData::State::eCustom) {
|
||
CustomElementDefinition* definition = data->GetCustomElementDefinition();
|
||
MOZ_ASSERT(definition, "Should have a valid CustomElementDefinition");
|
||
|
||
if (definition->IsInObservedAttributeList(aName)) {
|
||
nsAutoString ns;
|
||
nsContentUtils::NameSpaceManager()->GetNameSpaceURI(aNameSpaceID, ns);
|
||
|
||
RefPtr<nsAtom> oldValueAtom = oldValue.GetAsAtom();
|
||
LifecycleCallbackArgs args = {
|
||
nsDependentAtomString(aName), nsDependentAtomString(oldValueAtom),
|
||
VoidString(), (ns.IsEmpty() ? VoidString() : ns)};
|
||
|
||
nsContentUtils::EnqueueLifecycleCallback(
|
||
ElementCallbackType::eAttributeChanged, this, &args, nullptr,
|
||
definition);
|
||
}
|
||
}
|
||
|
||
rv = AfterSetAttr(aNameSpaceID, aName, nullptr, &oldValue, nullptr, aNotify);
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
|
||
UpdateState(aNotify);
|
||
|
||
if (aNotify) {
|
||
// We can always pass oldValue here since there is no new value which could
|
||
// have corrupted it.
|
||
MutationObservers::NotifyAttributeChanged(
|
||
this, aNameSpaceID, aName, MutationEvent_Binding::REMOVAL, &oldValue);
|
||
}
|
||
|
||
if (aNameSpaceID == kNameSpaceID_None && aName == nsGkAtoms::dir) {
|
||
OnSetDirAttr(this, nullptr, hadValidDir, hadDirAuto, aNotify);
|
||
}
|
||
|
||
if (hasMutationListeners) {
|
||
InternalMutationEvent mutation(true, eLegacyAttrModified);
|
||
|
||
mutation.mRelatedNode = attrNode;
|
||
mutation.mAttrName = aName;
|
||
|
||
nsAutoString value;
|
||
oldValue.ToString(value);
|
||
if (!value.IsEmpty()) mutation.mPrevAttrValue = NS_Atomize(value);
|
||
mutation.mAttrChange = MutationEvent_Binding::REMOVAL;
|
||
|
||
mozAutoSubtreeModified subtree(OwnerDoc(), this);
|
||
(new AsyncEventDispatcher(this, mutation))->RunDOMEventWhenSafe();
|
||
}
|
||
|
||
return NS_OK;
|
||
}
|
||
|
||
void Element::DescribeAttribute(uint32_t index,
|
||
nsAString& aOutDescription) const {
|
||
// name
|
||
mAttrs.AttrNameAt(index)->GetQualifiedName(aOutDescription);
|
||
|
||
// value
|
||
aOutDescription.AppendLiteral("=\"");
|
||
nsAutoString value;
|
||
mAttrs.AttrAt(index)->ToString(value);
|
||
for (uint32_t i = value.Length(); i > 0; --i) {
|
||
if (value[i - 1] == char16_t('"')) value.Insert(char16_t('\\'), i - 1);
|
||
}
|
||
aOutDescription.Append(value);
|
||
aOutDescription.Append('"');
|
||
}
|
||
|
||
#ifdef MOZ_DOM_LIST
|
||
void Element::ListAttributes(FILE* out) const {
|
||
uint32_t index, count = mAttrs.AttrCount();
|
||
for (index = 0; index < count; index++) {
|
||
nsAutoString attributeDescription;
|
||
DescribeAttribute(index, attributeDescription);
|
||
|
||
fputs(" ", out);
|
||
fputs(NS_LossyConvertUTF16toASCII(attributeDescription).get(), out);
|
||
}
|
||
}
|
||
|
||
void Element::List(FILE* out, int32_t aIndent, const nsCString& aPrefix) const {
|
||
int32_t indent;
|
||
for (indent = aIndent; --indent >= 0;) fputs(" ", out);
|
||
|
||
fputs(aPrefix.get(), out);
|
||
|
||
fputs(NS_LossyConvertUTF16toASCII(mNodeInfo->QualifiedName()).get(), out);
|
||
|
||
fprintf(out, "@%p", (void*)this);
|
||
|
||
ListAttributes(out);
|
||
|
||
fprintf(out, " state=[%llx]",
|
||
static_cast<unsigned long long>(State().GetInternalValue()));
|
||
fprintf(out, " flags=[%08x]", static_cast<unsigned int>(GetFlags()));
|
||
if (IsClosestCommonInclusiveAncestorForRangeInSelection()) {
|
||
const LinkedList<nsRange>* ranges =
|
||
GetExistingClosestCommonInclusiveAncestorRanges();
|
||
int32_t count = 0;
|
||
if (ranges) {
|
||
// Can't use range-based iteration on a const LinkedList, unfortunately.
|
||
for (const nsRange* r = ranges->getFirst(); r; r = r->getNext()) {
|
||
++count;
|
||
}
|
||
}
|
||
fprintf(out, " ranges:%d", count);
|
||
}
|
||
fprintf(out, " primaryframe=%p", static_cast<void*>(GetPrimaryFrame()));
|
||
fprintf(out, " refcount=%" PRIuPTR "<", mRefCnt.get());
|
||
|
||
nsIContent* child = GetFirstChild();
|
||
if (child) {
|
||
fputs("\n", out);
|
||
|
||
for (; child; child = child->GetNextSibling()) {
|
||
child->List(out, aIndent + 1);
|
||
}
|
||
|
||
for (indent = aIndent; --indent >= 0;) fputs(" ", out);
|
||
}
|
||
|
||
fputs(">\n", out);
|
||
}
|
||
|
||
void Element::DumpContent(FILE* out, int32_t aIndent, bool aDumpAll) const {
|
||
int32_t indent;
|
||
for (indent = aIndent; --indent >= 0;) fputs(" ", out);
|
||
|
||
const nsString& buf = mNodeInfo->QualifiedName();
|
||
fputs("<", out);
|
||
fputs(NS_LossyConvertUTF16toASCII(buf).get(), out);
|
||
|
||
if (aDumpAll) ListAttributes(out);
|
||
|
||
fputs(">", out);
|
||
|
||
if (aIndent) fputs("\n", out);
|
||
|
||
for (nsIContent* child = GetFirstChild(); child;
|
||
child = child->GetNextSibling()) {
|
||
int32_t indent = aIndent ? aIndent + 1 : 0;
|
||
child->DumpContent(out, indent, aDumpAll);
|
||
}
|
||
for (indent = aIndent; --indent >= 0;) fputs(" ", out);
|
||
fputs("</", out);
|
||
fputs(NS_LossyConvertUTF16toASCII(buf).get(), out);
|
||
fputs(">", out);
|
||
|
||
if (aIndent) fputs("\n", out);
|
||
}
|
||
#endif
|
||
|
||
void Element::Describe(nsAString& aOutDescription) const {
|
||
aOutDescription.Append(mNodeInfo->QualifiedName());
|
||
aOutDescription.AppendPrintf("@%p", (void*)this);
|
||
|
||
uint32_t index, count = mAttrs.AttrCount();
|
||
for (index = 0; index < count; index++) {
|
||
aOutDescription.Append(' ');
|
||
nsAutoString attributeDescription;
|
||
DescribeAttribute(index, attributeDescription);
|
||
aOutDescription.Append(attributeDescription);
|
||
}
|
||
}
|
||
|
||
bool Element::CheckHandleEventForLinksPrecondition(EventChainVisitor& aVisitor,
|
||
nsIURI** aURI) const {
|
||
if (aVisitor.mEventStatus == nsEventStatus_eConsumeNoDefault ||
|
||
(!aVisitor.mEvent->IsTrusted() &&
|
||
(aVisitor.mEvent->mMessage != eMouseClick) &&
|
||
(aVisitor.mEvent->mMessage != eKeyPress) &&
|
||
(aVisitor.mEvent->mMessage != eLegacyDOMActivate)) ||
|
||
aVisitor.mEvent->mFlags.mMultipleActionsPrevented) {
|
||
return false;
|
||
}
|
||
|
||
// Make sure we actually are a link
|
||
return IsLink(aURI);
|
||
}
|
||
|
||
void Element::GetEventTargetParentForLinks(EventChainPreVisitor& aVisitor) {
|
||
// Optimisation: return early if this event doesn't interest us.
|
||
// IMPORTANT: this switch and the switch below it must be kept in sync!
|
||
switch (aVisitor.mEvent->mMessage) {
|
||
case eMouseOver:
|
||
case eFocus:
|
||
case eMouseOut:
|
||
case eBlur:
|
||
break;
|
||
default:
|
||
return;
|
||
}
|
||
|
||
// Make sure we meet the preconditions before continuing
|
||
nsCOMPtr<nsIURI> absURI;
|
||
if (!CheckHandleEventForLinksPrecondition(aVisitor, getter_AddRefs(absURI))) {
|
||
return;
|
||
}
|
||
|
||
// We do the status bar updates in GetEventTargetParent so that the status bar
|
||
// gets updated even if the event is consumed before we have a chance to set
|
||
// it.
|
||
switch (aVisitor.mEvent->mMessage) {
|
||
// Set the status bar similarly for mouseover and focus
|
||
case eMouseOver:
|
||
aVisitor.mEventStatus = nsEventStatus_eConsumeNoDefault;
|
||
[[fallthrough]];
|
||
case eFocus: {
|
||
InternalFocusEvent* focusEvent = aVisitor.mEvent->AsFocusEvent();
|
||
if (!focusEvent || !focusEvent->mIsRefocus) {
|
||
nsAutoString target;
|
||
GetLinkTarget(target);
|
||
nsContentUtils::TriggerLink(this, absURI, target,
|
||
/* click */ false, /* isTrusted */ true);
|
||
// Make sure any ancestor links don't also TriggerLink
|
||
aVisitor.mEvent->mFlags.mMultipleActionsPrevented = true;
|
||
}
|
||
break;
|
||
}
|
||
case eMouseOut:
|
||
aVisitor.mEventStatus = nsEventStatus_eConsumeNoDefault;
|
||
[[fallthrough]];
|
||
case eBlur: {
|
||
nsresult rv = LeaveLink(aVisitor.mPresContext);
|
||
if (NS_SUCCEEDED(rv)) {
|
||
aVisitor.mEvent->mFlags.mMultipleActionsPrevented = true;
|
||
}
|
||
break;
|
||
}
|
||
|
||
default:
|
||
// switch not in sync with the optimization switch earlier in this
|
||
// function
|
||
MOZ_ASSERT_UNREACHABLE("switch statements not in sync");
|
||
}
|
||
}
|
||
|
||
nsresult Element::PostHandleEventForLinks(EventChainPostVisitor& aVisitor) {
|
||
// Optimisation: return early if this event doesn't interest us.
|
||
// IMPORTANT: this switch and the switch below it must be kept in sync!
|
||
switch (aVisitor.mEvent->mMessage) {
|
||
case eMouseDown:
|
||
case eMouseClick:
|
||
case eLegacyDOMActivate:
|
||
case eKeyPress:
|
||
break;
|
||
default:
|
||
return NS_OK;
|
||
}
|
||
|
||
// Make sure we meet the preconditions before continuing
|
||
nsCOMPtr<nsIURI> absURI;
|
||
if (!CheckHandleEventForLinksPrecondition(aVisitor, getter_AddRefs(absURI))) {
|
||
return NS_OK;
|
||
}
|
||
|
||
nsresult rv = NS_OK;
|
||
|
||
switch (aVisitor.mEvent->mMessage) {
|
||
case eMouseDown: {
|
||
if (aVisitor.mEvent->AsMouseEvent()->mButton == MouseButton::ePrimary &&
|
||
OwnerDoc()->LinkHandlingEnabled()) {
|
||
aVisitor.mEvent->mFlags.mMultipleActionsPrevented = true;
|
||
|
||
if (IsInComposedDoc()) {
|
||
if (RefPtr<nsFocusManager> fm = nsFocusManager::GetFocusManager()) {
|
||
RefPtr<Element> kungFuDeathGrip(this);
|
||
fm->SetFocus(kungFuDeathGrip, nsIFocusManager::FLAG_BYMOUSE |
|
||
nsIFocusManager::FLAG_NOSCROLL);
|
||
}
|
||
}
|
||
|
||
if (aVisitor.mPresContext) {
|
||
EventStateManager::SetActiveManager(
|
||
aVisitor.mPresContext->EventStateManager(), this);
|
||
}
|
||
|
||
// OK, we're pretty sure we're going to load, so warm up a speculative
|
||
// connection to be sure we have one ready when we open the channel.
|
||
if (nsIDocShell* shell = OwnerDoc()->GetDocShell()) {
|
||
nsCOMPtr<nsISpeculativeConnect> sc =
|
||
do_QueryInterface(nsContentUtils::GetIOService());
|
||
nsCOMPtr<nsIInterfaceRequestor> ir = do_QueryInterface(shell);
|
||
sc->SpeculativeConnect(absURI, NodePrincipal(), ir);
|
||
}
|
||
}
|
||
} break;
|
||
|
||
case eMouseClick: {
|
||
WidgetMouseEvent* mouseEvent = aVisitor.mEvent->AsMouseEvent();
|
||
if (mouseEvent->IsLeftClickEvent()) {
|
||
if (mouseEvent->IsControl() || mouseEvent->IsMeta() ||
|
||
mouseEvent->IsAlt() || mouseEvent->IsShift()) {
|
||
break;
|
||
}
|
||
|
||
// The default action is simply to dispatch DOMActivate
|
||
nsEventStatus status = nsEventStatus_eIgnore;
|
||
// DOMActive event should be trusted since the activation is actually
|
||
// occurred even if the cause is an untrusted click event.
|
||
InternalUIEvent actEvent(true, eLegacyDOMActivate, mouseEvent);
|
||
actEvent.mDetail = 1;
|
||
|
||
rv = EventDispatcher::Dispatch(this, aVisitor.mPresContext, &actEvent,
|
||
nullptr, &status);
|
||
if (NS_SUCCEEDED(rv)) {
|
||
aVisitor.mEventStatus = nsEventStatus_eConsumeNoDefault;
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
case eLegacyDOMActivate: {
|
||
if (aVisitor.mEvent->mOriginalTarget == this) {
|
||
nsAutoString target;
|
||
GetLinkTarget(target);
|
||
const InternalUIEvent* activeEvent = aVisitor.mEvent->AsUIEvent();
|
||
MOZ_ASSERT(activeEvent);
|
||
nsContentUtils::TriggerLink(this, absURI, target, /* click */ true,
|
||
activeEvent->IsTrustable());
|
||
aVisitor.mEventStatus = nsEventStatus_eConsumeNoDefault;
|
||
}
|
||
} break;
|
||
|
||
case eKeyPress: {
|
||
WidgetKeyboardEvent* keyEvent = aVisitor.mEvent->AsKeyboardEvent();
|
||
if (keyEvent && keyEvent->mKeyCode == NS_VK_RETURN) {
|
||
nsEventStatus status = nsEventStatus_eIgnore;
|
||
rv = DispatchClickEvent(aVisitor.mPresContext, keyEvent, this, false,
|
||
nullptr, &status);
|
||
if (NS_SUCCEEDED(rv)) {
|
||
aVisitor.mEventStatus = nsEventStatus_eConsumeNoDefault;
|
||
}
|
||
}
|
||
} break;
|
||
|
||
default:
|
||
// switch not in sync with the optimization switch earlier in this
|
||
// function
|
||
MOZ_ASSERT_UNREACHABLE("switch statements not in sync");
|
||
return NS_ERROR_UNEXPECTED;
|
||
}
|
||
|
||
return rv;
|
||
}
|
||
|
||
void Element::GetLinkTarget(nsAString& aTarget) { aTarget.Truncate(); }
|
||
|
||
static nsStaticAtom* const sPropertiesToTraverseAndUnlink[] = {
|
||
nsGkAtoms::dirAutoSetBy, nullptr};
|
||
|
||
// static
|
||
nsStaticAtom* const* Element::HTMLSVGPropertiesToTraverseAndUnlink() {
|
||
return sPropertiesToTraverseAndUnlink;
|
||
}
|
||
|
||
nsresult Element::CopyInnerTo(Element* aDst, ReparseAttributes aReparse) {
|
||
nsresult rv = aDst->mAttrs.EnsureCapacityToClone(mAttrs);
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
|
||
const bool reparse = aReparse == ReparseAttributes::Yes;
|
||
|
||
uint32_t count = mAttrs.AttrCount();
|
||
for (uint32_t i = 0; i < count; ++i) {
|
||
BorrowedAttrInfo info = mAttrs.AttrInfoAt(i);
|
||
const nsAttrName* name = info.mName;
|
||
const nsAttrValue* value = info.mValue;
|
||
if (value->Type() == nsAttrValue::eCSSDeclaration) {
|
||
MOZ_ASSERT(name->Equals(nsGkAtoms::style, kNameSpaceID_None));
|
||
// We still clone CSS attributes, even in the `reparse` (cross-document)
|
||
// case. https://github.com/w3c/webappsec-csp/issues/212
|
||
nsAttrValue valueCopy(*value);
|
||
rv = aDst->SetParsedAttr(name->NamespaceID(), name->LocalName(),
|
||
name->GetPrefix(), valueCopy, false);
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
|
||
value->GetCSSDeclarationValue()->SetImmutable();
|
||
} else if (reparse) {
|
||
nsAutoString valStr;
|
||
value->ToString(valStr);
|
||
rv = aDst->SetAttr(name->NamespaceID(), name->LocalName(),
|
||
name->GetPrefix(), valStr, false);
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
} else {
|
||
nsAttrValue valueCopy(*value);
|
||
rv = aDst->SetParsedAttr(name->NamespaceID(), name->LocalName(),
|
||
name->GetPrefix(), valueCopy, false);
|
||
NS_ENSURE_SUCCESS(rv, rv);
|
||
}
|
||
}
|
||
|
||
dom::NodeInfo* dstNodeInfo = aDst->NodeInfo();
|
||
if (CustomElementData* data = GetCustomElementData()) {
|
||
// The cloned node may be a custom element that may require
|
||
// enqueing upgrade reaction.
|
||
if (nsAtom* typeAtom = data->GetCustomElementType()) {
|
||
aDst->SetCustomElementData(new CustomElementData(typeAtom));
|
||
MOZ_ASSERT(dstNodeInfo->NameAtom()->Equals(dstNodeInfo->LocalName()));
|
||
CustomElementDefinition* definition =
|
||
nsContentUtils::LookupCustomElementDefinition(
|
||
dstNodeInfo->GetDocument(), dstNodeInfo->NameAtom(),
|
||
dstNodeInfo->NamespaceID(), typeAtom);
|
||
if (definition) {
|
||
nsContentUtils::EnqueueUpgradeReaction(aDst, definition);
|
||
}
|
||
}
|
||
}
|
||
|
||
if (dstNodeInfo->GetDocument()->IsStaticDocument()) {
|
||
// Propagate :defined state to the static clone.
|
||
if (State().HasState(NS_EVENT_STATE_DEFINED)) {
|
||
aDst->SetDefined(true);
|
||
}
|
||
}
|
||
|
||
return NS_OK;
|
||
}
|
||
|
||
Element* Element::Closest(const nsACString& aSelector, ErrorResult& aResult) {
|
||
const RawServoSelectorList* list = ParseSelectorList(aSelector, aResult);
|
||
if (!list) {
|
||
return nullptr;
|
||
}
|
||
|
||
return const_cast<Element*>(Servo_SelectorList_Closest(this, list));
|
||
}
|
||
|
||
bool Element::Matches(const nsACString& aSelector, ErrorResult& aResult) {
|
||
const RawServoSelectorList* list = ParseSelectorList(aSelector, aResult);
|
||
if (!list) {
|
||
return false;
|
||
}
|
||
|
||
return Servo_SelectorList_Matches(this, list);
|
||
}
|
||
|
||
static const nsAttrValue::EnumTable kCORSAttributeTable[] = {
|
||
// Order matters here
|
||
// See ParseCORSValue
|
||
{"anonymous", CORS_ANONYMOUS},
|
||
{"use-credentials", CORS_USE_CREDENTIALS},
|
||
{nullptr, 0}};
|
||
|
||
/* static */
|
||
void Element::ParseCORSValue(const nsAString& aValue, nsAttrValue& aResult) {
|
||
DebugOnly<bool> success =
|
||
aResult.ParseEnumValue(aValue, kCORSAttributeTable, false,
|
||
// default value is anonymous if aValue is
|
||
// not a value we understand
|
||
&kCORSAttributeTable[0]);
|
||
MOZ_ASSERT(success);
|
||
}
|
||
|
||
/* static */
|
||
CORSMode Element::StringToCORSMode(const nsAString& aValue) {
|
||
if (aValue.IsVoid()) {
|
||
return CORS_NONE;
|
||
}
|
||
|
||
nsAttrValue val;
|
||
Element::ParseCORSValue(aValue, val);
|
||
return CORSMode(val.GetEnumValue());
|
||
}
|
||
|
||
/* static */
|
||
CORSMode Element::AttrValueToCORSMode(const nsAttrValue* aValue) {
|
||
if (!aValue) {
|
||
return CORS_NONE;
|
||
}
|
||
|
||
return CORSMode(aValue->GetEnumValue());
|
||
}
|
||
|
||
/**
|
||
* Returns nullptr if requests for fullscreen are allowed in the current
|
||
* context. Requests are only allowed if the user initiated them (like with
|
||
* a mouse-click or key press), unless this check has been disabled by
|
||
* setting the pref "full-screen-api.allow-trusted-requests-only" to false
|
||
* or if the caller is privileged. Feature policy may also deny requests.
|
||
* If fullscreen is not allowed, a key for the error message is returned.
|
||
*/
|
||
static const char* GetFullscreenError(CallerType aCallerType,
|
||
Document* aDocument) {
|
||
MOZ_ASSERT(aDocument);
|
||
|
||
// Privileged callers can always request fullscreen
|
||
if (aCallerType == CallerType::System) {
|
||
return nullptr;
|
||
}
|
||
|
||
if (const char* error = aDocument->GetFullscreenError(aCallerType)) {
|
||
return error;
|
||
}
|
||
|
||
// Bypass user interaction checks if preference is set
|
||
if (!StaticPrefs::full_screen_api_allow_trusted_requests_only()) {
|
||
return nullptr;
|
||
}
|
||
|
||
if (!aDocument->ConsumeTransientUserGestureActivation()) {
|
||
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::eSecondary)) {
|
||
return "FullscreenDeniedMouseEventOnlyLeftBtn";
|
||
}
|
||
|
||
return nullptr;
|
||
}
|
||
|
||
void Element::SetCapture(bool aRetargetToElement) {
|
||
// If there is already an active capture, ignore this request. This would
|
||
// occur if a splitter, frame resizer, etc had already captured and we don't
|
||
// want to override those.
|
||
if (!PresShell::GetCapturingContent()) {
|
||
PresShell::SetCapturingContent(
|
||
this, CaptureFlags::PreventDragStart |
|
||
(aRetargetToElement ? CaptureFlags::RetargetToElement
|
||
: CaptureFlags::None));
|
||
}
|
||
}
|
||
|
||
void Element::SetCaptureAlways(bool aRetargetToElement) {
|
||
PresShell::SetCapturingContent(
|
||
this, CaptureFlags::PreventDragStart | CaptureFlags::IgnoreAllowedState |
|
||
(aRetargetToElement ? CaptureFlags::RetargetToElement
|
||
: CaptureFlags::None));
|
||
}
|
||
|
||
void Element::ReleaseCapture() {
|
||
if (PresShell::GetCapturingContent() == this) {
|
||
PresShell::ReleaseCapturingContent();
|
||
}
|
||
}
|
||
|
||
already_AddRefed<Promise> Element::RequestFullscreen(CallerType aCallerType,
|
||
ErrorResult& aRv) {
|
||
auto request = FullscreenRequest::Create(this, aCallerType, aRv);
|
||
RefPtr<Promise> promise = request->GetPromise();
|
||
|
||
// Only grant fullscreen requests if this is called from inside a trusted
|
||
// event handler (i.e. inside an event handler for a user initiated event).
|
||
// This stops the fullscreen from being abused similar to the popups of old,
|
||
// and it also makes it harder for bad guys' script to go fullscreen and
|
||
// spoof the browser chrome/window and phish logins etc.
|
||
// Note that requests for fullscreen inside a web app's origin are exempt
|
||
// from this restriction.
|
||
if (const char* error = GetFullscreenError(aCallerType, OwnerDoc())) {
|
||
request->Reject(error);
|
||
} else {
|
||
OwnerDoc()->AsyncRequestFullscreen(std::move(request));
|
||
}
|
||
return promise.forget();
|
||
}
|
||
|
||
void Element::RequestPointerLock(CallerType aCallerType) {
|
||
PointerLockManager::RequestLock(this, aCallerType);
|
||
}
|
||
|
||
already_AddRefed<Flex> Element::GetAsFlexContainer() {
|
||
// We need the flex frame to compute additional info, and use
|
||
// that annotated version of the frame.
|
||
nsFlexContainerFrame* flexFrame =
|
||
nsFlexContainerFrame::GetFlexFrameWithComputedInfo(
|
||
GetPrimaryFrame(FlushType::Layout));
|
||
|
||
if (flexFrame) {
|
||
RefPtr<Flex> flex = new Flex(this, flexFrame);
|
||
return flex.forget();
|
||
}
|
||
return nullptr;
|
||
}
|
||
|
||
void Element::GetGridFragments(nsTArray<RefPtr<Grid>>& aResult) {
|
||
nsGridContainerFrame* frame =
|
||
nsGridContainerFrame::GetGridFrameWithComputedInfo(
|
||
GetPrimaryFrame(FlushType::Layout));
|
||
|
||
// If we get a nsGridContainerFrame from the prior call,
|
||
// all the next-in-flow frames will also be nsGridContainerFrames.
|
||
while (frame) {
|
||
aResult.AppendElement(new Grid(this, frame));
|
||
frame = static_cast<nsGridContainerFrame*>(frame->GetNextInFlow());
|
||
}
|
||
}
|
||
|
||
bool Element::HasGridFragments() {
|
||
return !!nsGridContainerFrame::GetGridFrameWithComputedInfo(
|
||
GetPrimaryFrame(FlushType::Layout));
|
||
}
|
||
|
||
already_AddRefed<DOMMatrixReadOnly> Element::GetTransformToAncestor(
|
||
Element& aAncestor) {
|
||
nsIFrame* primaryFrame = GetPrimaryFrame();
|
||
nsIFrame* ancestorFrame = aAncestor.GetPrimaryFrame();
|
||
|
||
Matrix4x4 transform;
|
||
if (primaryFrame) {
|
||
// If aAncestor is not actually an ancestor of this (including nullptr),
|
||
// then the call to GetTransformToAncestor will return the transform
|
||
// all the way up through the parent chain.
|
||
transform = nsLayoutUtils::GetTransformToAncestor(RelativeTo{primaryFrame},
|
||
RelativeTo{ancestorFrame},
|
||
nsIFrame::IN_CSS_UNITS)
|
||
.GetMatrix();
|
||
}
|
||
|
||
DOMMatrixReadOnly* matrix = new DOMMatrix(this, transform);
|
||
RefPtr<DOMMatrixReadOnly> result(matrix);
|
||
return result.forget();
|
||
}
|
||
|
||
already_AddRefed<DOMMatrixReadOnly> Element::GetTransformToParent() {
|
||
nsIFrame* primaryFrame = GetPrimaryFrame();
|
||
|
||
Matrix4x4 transform;
|
||
if (primaryFrame) {
|
||
nsIFrame* parentFrame = primaryFrame->GetParent();
|
||
transform = nsLayoutUtils::GetTransformToAncestor(RelativeTo{primaryFrame},
|
||
RelativeTo{parentFrame},
|
||
nsIFrame::IN_CSS_UNITS)
|
||
.GetMatrix();
|
||
}
|
||
|
||
DOMMatrixReadOnly* matrix = new DOMMatrix(this, transform);
|
||
RefPtr<DOMMatrixReadOnly> result(matrix);
|
||
return result.forget();
|
||
}
|
||
|
||
already_AddRefed<DOMMatrixReadOnly> Element::GetTransformToViewport() {
|
||
nsIFrame* primaryFrame = GetPrimaryFrame();
|
||
Matrix4x4 transform;
|
||
if (primaryFrame) {
|
||
transform =
|
||
nsLayoutUtils::GetTransformToAncestor(
|
||
RelativeTo{primaryFrame},
|
||
RelativeTo{nsLayoutUtils::GetDisplayRootFrame(primaryFrame)},
|
||
nsIFrame::IN_CSS_UNITS)
|
||
.GetMatrix();
|
||
}
|
||
|
||
DOMMatrixReadOnly* matrix = new DOMMatrix(this, transform);
|
||
RefPtr<DOMMatrixReadOnly> result(matrix);
|
||
return result.forget();
|
||
}
|
||
|
||
already_AddRefed<Animation> Element::Animate(
|
||
JSContext* aContext, JS::Handle<JSObject*> aKeyframes,
|
||
const UnrestrictedDoubleOrKeyframeAnimationOptions& aOptions,
|
||
ErrorResult& aError) {
|
||
nsCOMPtr<nsIGlobalObject> ownerGlobal = GetOwnerGlobal();
|
||
if (!ownerGlobal) {
|
||
aError.Throw(NS_ERROR_FAILURE);
|
||
return nullptr;
|
||
}
|
||
GlobalObject global(aContext, ownerGlobal->GetGlobalJSObject());
|
||
MOZ_ASSERT(!global.Failed());
|
||
|
||
// KeyframeEffect constructor doesn't follow the standard Xray calling
|
||
// convention and needs to be called in caller's compartment.
|
||
// This should match to RunConstructorInCallerCompartment attribute in
|
||
// KeyframeEffect.webidl.
|
||
RefPtr<KeyframeEffect> effect =
|
||
KeyframeEffect::Constructor(global, this, aKeyframes, aOptions, aError);
|
||
if (aError.Failed()) {
|
||
return nullptr;
|
||
}
|
||
|
||
// Animation constructor follows the standard Xray calling convention and
|
||
// needs to be called in the target element's realm.
|
||
JSAutoRealm ar(aContext, global.Get());
|
||
|
||
AnimationTimeline* timeline = OwnerDoc()->Timeline();
|
||
RefPtr<Animation> animation = Animation::Constructor(
|
||
global, effect, Optional<AnimationTimeline*>(timeline), aError);
|
||
if (aError.Failed()) {
|
||
return nullptr;
|
||
}
|
||
|
||
if (aOptions.IsKeyframeAnimationOptions()) {
|
||
animation->SetId(aOptions.GetAsKeyframeAnimationOptions().mId);
|
||
}
|
||
|
||
animation->Play(aError, Animation::LimitBehavior::AutoRewind);
|
||
if (aError.Failed()) {
|
||
return nullptr;
|
||
}
|
||
|
||
return animation.forget();
|
||
}
|
||
|
||
void Element::GetAnimations(const GetAnimationsOptions& aOptions,
|
||
nsTArray<RefPtr<Animation>>& aAnimations) {
|
||
if (Document* doc = GetComposedDoc()) {
|
||
// We don't need to explicitly flush throttled animations here, since
|
||
// updating the animation style of elements will never affect the set of
|
||
// running animations and it's only the set of running animations that is
|
||
// important here.
|
||
//
|
||
// NOTE: Any changes to the flags passed to the following call should
|
||
// be reflected in the flags passed in DocumentOrShadowRoot::GetAnimations
|
||
// too.
|
||
doc->FlushPendingNotifications(
|
||
ChangesToFlush(FlushType::Style, false /* flush animations */));
|
||
}
|
||
|
||
GetAnimationsWithoutFlush(aOptions, aAnimations);
|
||
}
|
||
|
||
void Element::GetAnimationsWithoutFlush(
|
||
const GetAnimationsOptions& aOptions,
|
||
nsTArray<RefPtr<Animation>>& aAnimations) {
|
||
Element* elem = this;
|
||
PseudoStyleType pseudoType = PseudoStyleType::NotPseudo;
|
||
// For animations on generated-content elements, the animations are stored
|
||
// on the parent element.
|
||
if (IsGeneratedContentContainerForBefore()) {
|
||
elem = GetParentElement();
|
||
pseudoType = PseudoStyleType::before;
|
||
} else if (IsGeneratedContentContainerForAfter()) {
|
||
elem = GetParentElement();
|
||
pseudoType = PseudoStyleType::after;
|
||
} else if (IsGeneratedContentContainerForMarker()) {
|
||
elem = GetParentElement();
|
||
pseudoType = PseudoStyleType::marker;
|
||
}
|
||
|
||
if (!elem) {
|
||
return;
|
||
}
|
||
|
||
if (!aOptions.mSubtree || pseudoType == PseudoStyleType::before ||
|
||
pseudoType == PseudoStyleType::after ||
|
||
pseudoType == PseudoStyleType::marker) {
|
||
GetAnimationsUnsorted(elem, pseudoType, aAnimations);
|
||
} else {
|
||
for (nsIContent* node = this; node; node = node->GetNextNode(this)) {
|
||
if (!node->IsElement()) {
|
||
continue;
|
||
}
|
||
Element* element = node->AsElement();
|
||
Element::GetAnimationsUnsorted(element, PseudoStyleType::NotPseudo,
|
||
aAnimations);
|
||
Element::GetAnimationsUnsorted(element, PseudoStyleType::before,
|
||
aAnimations);
|
||
Element::GetAnimationsUnsorted(element, PseudoStyleType::after,
|
||
aAnimations);
|
||
Element::GetAnimationsUnsorted(element, PseudoStyleType::marker,
|
||
aAnimations);
|
||
}
|
||
}
|
||
aAnimations.Sort(AnimationPtrComparator<RefPtr<Animation>>());
|
||
}
|
||
|
||
/* static */
|
||
void Element::GetAnimationsUnsorted(Element* aElement,
|
||
PseudoStyleType aPseudoType,
|
||
nsTArray<RefPtr<Animation>>& aAnimations) {
|
||
MOZ_ASSERT(aPseudoType == PseudoStyleType::NotPseudo ||
|
||
aPseudoType == PseudoStyleType::after ||
|
||
aPseudoType == PseudoStyleType::before ||
|
||
aPseudoType == PseudoStyleType::marker,
|
||
"Unsupported pseudo type");
|
||
MOZ_ASSERT(aElement, "Null element");
|
||
|
||
EffectSet* effects = EffectSet::GetEffectSet(aElement, aPseudoType);
|
||
if (!effects) {
|
||
return;
|
||
}
|
||
|
||
for (KeyframeEffect* effect : *effects) {
|
||
MOZ_ASSERT(effect && effect->GetAnimation(),
|
||
"Only effects associated with an animation should be "
|
||
"added to an element's effect set");
|
||
Animation* animation = effect->GetAnimation();
|
||
|
||
MOZ_ASSERT(animation->IsRelevant(),
|
||
"Only relevant animations should be added to an element's "
|
||
"effect set");
|
||
aAnimations.AppendElement(animation);
|
||
}
|
||
}
|
||
|
||
void Element::CloneAnimationsFrom(const Element& aOther) {
|
||
AnimationTimeline* const timeline = OwnerDoc()->Timeline();
|
||
MOZ_ASSERT(timeline, "Timeline has not been set on the document yet");
|
||
// Iterate through all pseudo types and copy the effects from each of the
|
||
// other element's effect sets into this element's effect set.
|
||
for (PseudoStyleType pseudoType :
|
||
{PseudoStyleType::NotPseudo, PseudoStyleType::before,
|
||
PseudoStyleType::after, PseudoStyleType::marker}) {
|
||
// If the element has an effect set for this pseudo type (or not pseudo)
|
||
// then copy the effects and animation properties.
|
||
if (EffectSet* const effects =
|
||
EffectSet::GetEffectSet(&aOther, pseudoType)) {
|
||
EffectSet* const clonedEffects =
|
||
EffectSet::GetOrCreateEffectSet(this, pseudoType);
|
||
for (KeyframeEffect* const effect : *effects) {
|
||
// Clone the effect.
|
||
RefPtr<KeyframeEffect> clonedEffect = new KeyframeEffect(
|
||
OwnerDoc(), OwningAnimationTarget{this, pseudoType}, *effect);
|
||
|
||
// Clone the animation
|
||
RefPtr<Animation> clonedAnimation = Animation::ClonePausedAnimation(
|
||
OwnerDoc()->GetParentObject(), *effect->GetAnimation(),
|
||
*clonedEffect, *timeline);
|
||
clonedEffects->AddEffect(*clonedEffect);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
void Element::GetInnerHTML(nsAString& aInnerHTML, OOMReporter& aError) {
|
||
GetMarkup(false, aInnerHTML);
|
||
}
|
||
|
||
void Element::SetInnerHTML(const nsAString& aInnerHTML,
|
||
nsIPrincipal* aSubjectPrincipal,
|
||
ErrorResult& aError) {
|
||
SetInnerHTMLInternal(aInnerHTML, aError);
|
||
}
|
||
|
||
void Element::GetOuterHTML(nsAString& aOuterHTML) {
|
||
GetMarkup(true, aOuterHTML);
|
||
}
|
||
|
||
void Element::SetOuterHTML(const nsAString& aOuterHTML, ErrorResult& aError) {
|
||
nsCOMPtr<nsINode> parent = GetParentNode();
|
||
if (!parent) {
|
||
return;
|
||
}
|
||
|
||
if (parent->NodeType() == DOCUMENT_NODE) {
|
||
aError.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
|
||
return;
|
||
}
|
||
|
||
if (OwnerDoc()->IsHTMLDocument()) {
|
||
nsAtom* localName;
|
||
int32_t namespaceID;
|
||
if (parent->IsElement()) {
|
||
localName = parent->NodeInfo()->NameAtom();
|
||
namespaceID = parent->NodeInfo()->NamespaceID();
|
||
} else {
|
||
NS_ASSERTION(
|
||
parent->NodeType() == DOCUMENT_FRAGMENT_NODE,
|
||
"How come the parent isn't a document, a fragment or an element?");
|
||
localName = nsGkAtoms::body;
|
||
namespaceID = kNameSpaceID_XHTML;
|
||
}
|
||
RefPtr<DocumentFragment> fragment = new (OwnerDoc()->NodeInfoManager())
|
||
DocumentFragment(OwnerDoc()->NodeInfoManager());
|
||
nsContentUtils::ParseFragmentHTML(
|
||
aOuterHTML, fragment, localName, namespaceID,
|
||
OwnerDoc()->GetCompatibilityMode() == eCompatibility_NavQuirks, true);
|
||
parent->ReplaceChild(*fragment, *this, aError);
|
||
return;
|
||
}
|
||
|
||
nsCOMPtr<nsINode> context;
|
||
if (parent->IsElement()) {
|
||
context = parent;
|
||
} else {
|
||
NS_ASSERTION(
|
||
parent->NodeType() == DOCUMENT_FRAGMENT_NODE,
|
||
"How come the parent isn't a document, a fragment or an element?");
|
||
RefPtr<mozilla::dom::NodeInfo> info =
|
||
OwnerDoc()->NodeInfoManager()->GetNodeInfo(
|
||
nsGkAtoms::body, nullptr, kNameSpaceID_XHTML, ELEMENT_NODE);
|
||
context = NS_NewHTMLBodyElement(info.forget(), FROM_PARSER_FRAGMENT);
|
||
}
|
||
|
||
RefPtr<DocumentFragment> fragment = nsContentUtils::CreateContextualFragment(
|
||
context, aOuterHTML, true, aError);
|
||
if (aError.Failed()) {
|
||
return;
|
||
}
|
||
parent->ReplaceChild(*fragment, *this, aError);
|
||
}
|
||
|
||
enum nsAdjacentPosition { eBeforeBegin, eAfterBegin, eBeforeEnd, eAfterEnd };
|
||
|
||
void Element::InsertAdjacentHTML(const nsAString& aPosition,
|
||
const nsAString& aText, ErrorResult& aError) {
|
||
nsAdjacentPosition position;
|
||
if (aPosition.LowerCaseEqualsLiteral("beforebegin")) {
|
||
position = eBeforeBegin;
|
||
} else if (aPosition.LowerCaseEqualsLiteral("afterbegin")) {
|
||
position = eAfterBegin;
|
||
} else if (aPosition.LowerCaseEqualsLiteral("beforeend")) {
|
||
position = eBeforeEnd;
|
||
} else if (aPosition.LowerCaseEqualsLiteral("afterend")) {
|
||
position = eAfterEnd;
|
||
} else {
|
||
aError.Throw(NS_ERROR_DOM_SYNTAX_ERR);
|
||
return;
|
||
}
|
||
|
||
nsCOMPtr<nsIContent> destination;
|
||
if (position == eBeforeBegin || position == eAfterEnd) {
|
||
destination = GetParent();
|
||
if (!destination) {
|
||
aError.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
|
||
return;
|
||
}
|
||
} else {
|
||
destination = this;
|
||
}
|
||
|
||
Document* doc = OwnerDoc();
|
||
|
||
// Needed when insertAdjacentHTML is used in combination with contenteditable
|
||
mozAutoDocUpdate updateBatch(doc, true);
|
||
nsAutoScriptLoaderDisabler sld(doc);
|
||
|
||
// Batch possible DOMSubtreeModified events.
|
||
mozAutoSubtreeModified subtree(doc, nullptr);
|
||
|
||
// Parse directly into destination if possible
|
||
if (doc->IsHTMLDocument() && !OwnerDoc()->MayHaveDOMMutationObservers() &&
|
||
(position == eBeforeEnd || (position == eAfterEnd && !GetNextSibling()) ||
|
||
(position == eAfterBegin && !GetFirstChild()))) {
|
||
int32_t oldChildCount = destination->GetChildCount();
|
||
int32_t contextNs = destination->GetNameSpaceID();
|
||
nsAtom* contextLocal = destination->NodeInfo()->NameAtom();
|
||
if (contextLocal == nsGkAtoms::html && contextNs == kNameSpaceID_XHTML) {
|
||
// For compat with IE6 through IE9. Willful violation of HTML5 as of
|
||
// 2011-04-06. CreateContextualFragment does the same already.
|
||
// Spec bug: http://www.w3.org/Bugs/Public/show_bug.cgi?id=12434
|
||
contextLocal = nsGkAtoms::body;
|
||
}
|
||
aError = nsContentUtils::ParseFragmentHTML(
|
||
aText, destination, contextLocal, contextNs,
|
||
doc->GetCompatibilityMode() == eCompatibility_NavQuirks, true);
|
||
// HTML5 parser has notified, but not fired mutation events.
|
||
nsContentUtils::FireMutationEventsForDirectParsing(doc, destination,
|
||
oldChildCount);
|
||
return;
|
||
}
|
||
|
||
// couldn't parse directly
|
||
RefPtr<DocumentFragment> fragment = nsContentUtils::CreateContextualFragment(
|
||
destination, aText, true, aError);
|
||
if (aError.Failed()) {
|
||
return;
|
||
}
|
||
|
||
// Suppress assertion about node removal mutation events that can't have
|
||
// listeners anyway, because no one has had the chance to register mutation
|
||
// listeners on the fragment that comes from the parser.
|
||
nsAutoScriptBlockerSuppressNodeRemoved scriptBlocker;
|
||
|
||
nsAutoMutationBatch mb(destination, true, false);
|
||
switch (position) {
|
||
case eBeforeBegin:
|
||
destination->InsertBefore(*fragment, this, aError);
|
||
break;
|
||
case eAfterBegin:
|
||
static_cast<nsINode*>(this)->InsertBefore(*fragment, GetFirstChild(),
|
||
aError);
|
||
break;
|
||
case eBeforeEnd:
|
||
static_cast<nsINode*>(this)->AppendChild(*fragment, aError);
|
||
break;
|
||
case eAfterEnd:
|
||
destination->InsertBefore(*fragment, GetNextSibling(), aError);
|
||
break;
|
||
}
|
||
}
|
||
|
||
nsINode* Element::InsertAdjacent(const nsAString& aWhere, nsINode* aNode,
|
||
ErrorResult& aError) {
|
||
if (aWhere.LowerCaseEqualsLiteral("beforebegin")) {
|
||
nsCOMPtr<nsINode> parent = GetParentNode();
|
||
if (!parent) {
|
||
return nullptr;
|
||
}
|
||
parent->InsertBefore(*aNode, this, aError);
|
||
} else if (aWhere.LowerCaseEqualsLiteral("afterbegin")) {
|
||
nsCOMPtr<nsINode> refNode = GetFirstChild();
|
||
static_cast<nsINode*>(this)->InsertBefore(*aNode, refNode, aError);
|
||
} else if (aWhere.LowerCaseEqualsLiteral("beforeend")) {
|
||
static_cast<nsINode*>(this)->AppendChild(*aNode, aError);
|
||
} else if (aWhere.LowerCaseEqualsLiteral("afterend")) {
|
||
nsCOMPtr<nsINode> parent = GetParentNode();
|
||
if (!parent) {
|
||
return nullptr;
|
||
}
|
||
nsCOMPtr<nsINode> refNode = GetNextSibling();
|
||
parent->InsertBefore(*aNode, refNode, aError);
|
||
} else {
|
||
aError.Throw(NS_ERROR_DOM_SYNTAX_ERR);
|
||
return nullptr;
|
||
}
|
||
|
||
return aError.Failed() ? nullptr : aNode;
|
||
}
|
||
|
||
Element* Element::InsertAdjacentElement(const nsAString& aWhere,
|
||
Element& aElement,
|
||
ErrorResult& aError) {
|
||
nsINode* newNode = InsertAdjacent(aWhere, &aElement, aError);
|
||
MOZ_ASSERT(!newNode || newNode->IsElement());
|
||
|
||
return newNode ? newNode->AsElement() : nullptr;
|
||
}
|
||
|
||
void Element::InsertAdjacentText(const nsAString& aWhere,
|
||
const nsAString& aData, ErrorResult& aError) {
|
||
RefPtr<nsTextNode> textNode = OwnerDoc()->CreateTextNode(aData);
|
||
InsertAdjacent(aWhere, textNode, aError);
|
||
}
|
||
|
||
TextEditor* Element::GetTextEditorInternal() {
|
||
TextControlElement* textControlElement = TextControlElement::FromNode(this);
|
||
return textControlElement ? MOZ_KnownLive(textControlElement)->GetTextEditor()
|
||
: nullptr;
|
||
}
|
||
|
||
nsresult Element::SetBoolAttr(nsAtom* aAttr, bool aValue) {
|
||
if (aValue) {
|
||
return SetAttr(kNameSpaceID_None, aAttr, u""_ns, true);
|
||
}
|
||
|
||
return UnsetAttr(kNameSpaceID_None, aAttr, true);
|
||
}
|
||
|
||
void Element::GetEnumAttr(nsAtom* aAttr, const char* aDefault,
|
||
nsAString& aResult) const {
|
||
GetEnumAttr(aAttr, aDefault, aDefault, aResult);
|
||
}
|
||
|
||
void Element::GetEnumAttr(nsAtom* aAttr, const char* aDefaultMissing,
|
||
const char* aDefaultInvalid,
|
||
nsAString& aResult) const {
|
||
const nsAttrValue* attrVal = mAttrs.GetAttr(aAttr);
|
||
|
||
aResult.Truncate();
|
||
|
||
if (!attrVal) {
|
||
if (aDefaultMissing) {
|
||
AppendASCIItoUTF16(nsDependentCString(aDefaultMissing), aResult);
|
||
} else {
|
||
SetDOMStringToNull(aResult);
|
||
}
|
||
} else {
|
||
if (attrVal->Type() == nsAttrValue::eEnum) {
|
||
attrVal->GetEnumString(aResult, true);
|
||
} else if (aDefaultInvalid) {
|
||
AppendASCIItoUTF16(nsDependentCString(aDefaultInvalid), aResult);
|
||
}
|
||
}
|
||
}
|
||
|
||
void Element::SetOrRemoveNullableStringAttr(nsAtom* aName,
|
||
const nsAString& aValue,
|
||
ErrorResult& aError) {
|
||
if (DOMStringIsNull(aValue)) {
|
||
UnsetAttr(aName, aError);
|
||
} else {
|
||
SetAttr(aName, aValue, aError);
|
||
}
|
||
}
|
||
|
||
Directionality Element::GetComputedDirectionality() const {
|
||
if (nsIFrame* frame = GetPrimaryFrame()) {
|
||
return frame->StyleVisibility()->mDirection == StyleDirection::Ltr
|
||
? eDir_LTR
|
||
: eDir_RTL;
|
||
}
|
||
|
||
return GetDirectionality();
|
||
}
|
||
|
||
float Element::FontSizeInflation() {
|
||
nsIFrame* frame = GetPrimaryFrame();
|
||
if (!frame) {
|
||
return -1.0;
|
||
}
|
||
|
||
if (nsLayoutUtils::FontSizeInflationEnabled(frame->PresContext())) {
|
||
return nsLayoutUtils::FontSizeInflationFor(frame);
|
||
}
|
||
|
||
return 1.0;
|
||
}
|
||
|
||
void Element::GetImplementedPseudoElement(nsAString& aPseudo) const {
|
||
PseudoStyleType pseudoType = GetPseudoElementType();
|
||
if (pseudoType == PseudoStyleType::NotPseudo) {
|
||
return SetDOMStringToNull(aPseudo);
|
||
}
|
||
nsDependentAtomString pseudo(nsCSSPseudoElements::GetPseudoAtom(pseudoType));
|
||
|
||
// We want to use the modern syntax (::placeholder, etc), but the atoms only
|
||
// contain one semi-colon.
|
||
MOZ_ASSERT(pseudo.Length() > 2 && pseudo[0] == ':' && pseudo[1] != ':');
|
||
|
||
aPseudo.Truncate();
|
||
aPseudo.SetCapacity(pseudo.Length() + 1);
|
||
aPseudo.Append(':');
|
||
aPseudo.Append(pseudo);
|
||
}
|
||
|
||
ReferrerPolicy Element::GetReferrerPolicyAsEnum() const {
|
||
if (IsHTMLElement()) {
|
||
return ReferrerPolicyFromAttr(GetParsedAttr(nsGkAtoms::referrerpolicy));
|
||
}
|
||
return ReferrerPolicy::_empty;
|
||
}
|
||
|
||
ReferrerPolicy Element::ReferrerPolicyFromAttr(
|
||
const nsAttrValue* aValue) const {
|
||
if (aValue && aValue->Type() == nsAttrValue::eEnum) {
|
||
return ReferrerPolicy(aValue->GetEnumValue());
|
||
}
|
||
return ReferrerPolicy::_empty;
|
||
}
|
||
|
||
already_AddRefed<nsDOMStringMap> Element::Dataset() {
|
||
nsDOMSlots* slots = DOMSlots();
|
||
|
||
if (!slots->mDataset) {
|
||
// mDataset is a weak reference so assignment will not AddRef.
|
||
// AddRef is called before returning the pointer.
|
||
slots->mDataset = new nsDOMStringMap(this);
|
||
}
|
||
|
||
RefPtr<nsDOMStringMap> ret = slots->mDataset;
|
||
return ret.forget();
|
||
}
|
||
|
||
void Element::ClearDataset() {
|
||
nsDOMSlots* slots = GetExistingDOMSlots();
|
||
|
||
MOZ_ASSERT(slots && slots->mDataset,
|
||
"Slots should exist and dataset should not be null.");
|
||
slots->mDataset = nullptr;
|
||
}
|
||
|
||
enum nsPreviousIntersectionThreshold {
|
||
eUninitialized = -2,
|
||
eNonIntersecting = -1
|
||
};
|
||
|
||
static void IntersectionObserverPropertyDtor(void* aObject,
|
||
nsAtom* aPropertyName,
|
||
void* aPropertyValue,
|
||
void* aData) {
|
||
auto* element = static_cast<Element*>(aObject);
|
||
auto* observers = static_cast<IntersectionObserverList*>(aPropertyValue);
|
||
for (DOMIntersectionObserver* observer : observers->Keys()) {
|
||
observer->UnlinkTarget(*element);
|
||
}
|
||
delete observers;
|
||
}
|
||
|
||
void Element::RegisterIntersectionObserver(DOMIntersectionObserver* aObserver) {
|
||
IntersectionObserverList* observers = static_cast<IntersectionObserverList*>(
|
||
GetProperty(nsGkAtoms::intersectionobserverlist));
|
||
|
||
if (!observers) {
|
||
observers = new IntersectionObserverList();
|
||
observers->InsertOrUpdate(aObserver, eUninitialized);
|
||
SetProperty(nsGkAtoms::intersectionobserverlist, observers,
|
||
IntersectionObserverPropertyDtor, /* aTransfer = */ true);
|
||
return;
|
||
}
|
||
|
||
// Value can be:
|
||
// -2: Makes sure next calculated threshold always differs, leading to a
|
||
// notification task being scheduled.
|
||
// -1: Non-intersecting.
|
||
// >= 0: Intersecting, valid index of aObserver->mThresholds.
|
||
observers->LookupOrInsert(aObserver, eUninitialized);
|
||
}
|
||
|
||
void Element::UnregisterIntersectionObserver(
|
||
DOMIntersectionObserver* aObserver) {
|
||
auto* observers = static_cast<IntersectionObserverList*>(
|
||
GetProperty(nsGkAtoms::intersectionobserverlist));
|
||
if (observers) {
|
||
observers->Remove(aObserver);
|
||
if (observers->IsEmpty()) {
|
||
RemoveProperty(nsGkAtoms::intersectionobserverlist);
|
||
}
|
||
}
|
||
}
|
||
|
||
void Element::UnlinkIntersectionObservers() {
|
||
// IntersectionObserverPropertyDtor takes care of the hard work.
|
||
RemoveProperty(nsGkAtoms::intersectionobserverlist);
|
||
}
|
||
|
||
bool Element::UpdateIntersectionObservation(DOMIntersectionObserver* aObserver,
|
||
int32_t aThreshold) {
|
||
auto* observers = static_cast<IntersectionObserverList*>(
|
||
GetProperty(nsGkAtoms::intersectionobserverlist));
|
||
if (!observers) {
|
||
return false;
|
||
}
|
||
bool updated = false;
|
||
if (auto entry = observers->Lookup(aObserver)) {
|
||
updated = entry.Data() != aThreshold;
|
||
entry.Data() = aThreshold;
|
||
}
|
||
return updated;
|
||
}
|
||
|
||
template <class T>
|
||
void Element::GetCustomInterface(nsGetterAddRefs<T> aResult) {
|
||
nsCOMPtr<nsISupports> iface = CustomElementRegistry::CallGetCustomInterface(
|
||
this, NS_GET_TEMPLATE_IID(T));
|
||
if (iface) {
|
||
if (NS_SUCCEEDED(CallQueryInterface(iface, static_cast<T**>(aResult)))) {
|
||
return;
|
||
}
|
||
}
|
||
}
|
||
|
||
void Element::ClearServoData(Document* aDoc) {
|
||
MOZ_ASSERT(aDoc);
|
||
if (HasServoData()) {
|
||
Servo_Element_ClearData(this);
|
||
} else {
|
||
UnsetFlags(kAllServoDescendantBits | NODE_NEEDS_FRAME);
|
||
}
|
||
// Since this element is losing its servo data, nothing under it may have
|
||
// servo data either, so we can forget restyles rooted at this element. This
|
||
// is necessary for correctness, since we invoke ClearServoData in various
|
||
// places where an element's flattened tree parent changes, and such a change
|
||
// may also make an element invalid to be used as a restyle root.
|
||
if (aDoc->GetServoRestyleRoot() == this) {
|
||
aDoc->ClearServoRestyleRoot();
|
||
}
|
||
}
|
||
|
||
void Element::SetCustomElementData(CustomElementData* aData) {
|
||
SetHasCustomElementData();
|
||
|
||
if (aData->mState != CustomElementData::State::eCustom) {
|
||
SetDefined(false);
|
||
}
|
||
|
||
nsExtendedDOMSlots* slots = ExtendedDOMSlots();
|
||
MOZ_ASSERT(!slots->mCustomElementData,
|
||
"Custom element data may not be changed once set.");
|
||
#if DEBUG
|
||
// We assert only XUL usage, since web may pass whatever as 'is' value
|
||
if (NodeInfo()->NamespaceID() == kNameSpaceID_XUL) {
|
||
nsAtom* name = NodeInfo()->NameAtom();
|
||
nsAtom* type = aData->GetCustomElementType();
|
||
// Check to see if the tag name is a dashed name.
|
||
if (nsContentUtils::IsNameWithDash(name)) {
|
||
// Assert that a tag name with dashes is always an autonomous custom
|
||
// element.
|
||
MOZ_ASSERT(type == name);
|
||
} else {
|
||
// Could still be an autonomous custom element with a non-dashed tag name.
|
||
// Need the check below for sure.
|
||
if (type != name) {
|
||
// Assert that the name of the built-in custom element type is always
|
||
// a dashed name.
|
||
MOZ_ASSERT(nsContentUtils::IsNameWithDash(type));
|
||
}
|
||
}
|
||
}
|
||
#endif
|
||
slots->mCustomElementData = aData;
|
||
}
|
||
|
||
CustomElementDefinition* Element::GetCustomElementDefinition() const {
|
||
CustomElementData* data = GetCustomElementData();
|
||
if (!data) {
|
||
return nullptr;
|
||
}
|
||
|
||
return data->GetCustomElementDefinition();
|
||
}
|
||
|
||
void Element::SetCustomElementDefinition(CustomElementDefinition* aDefinition) {
|
||
CustomElementData* data = GetCustomElementData();
|
||
MOZ_ASSERT(data);
|
||
|
||
data->SetCustomElementDefinition(aDefinition);
|
||
}
|
||
|
||
already_AddRefed<nsIDOMXULButtonElement> Element::AsXULButton() {
|
||
nsCOMPtr<nsIDOMXULButtonElement> value;
|
||
GetCustomInterface(getter_AddRefs(value));
|
||
return value.forget();
|
||
}
|
||
|
||
already_AddRefed<nsIDOMXULContainerElement> Element::AsXULContainer() {
|
||
nsCOMPtr<nsIDOMXULContainerElement> value;
|
||
GetCustomInterface(getter_AddRefs(value));
|
||
return value.forget();
|
||
}
|
||
|
||
already_AddRefed<nsIDOMXULContainerItemElement> Element::AsXULContainerItem() {
|
||
nsCOMPtr<nsIDOMXULContainerItemElement> value;
|
||
GetCustomInterface(getter_AddRefs(value));
|
||
return value.forget();
|
||
}
|
||
|
||
already_AddRefed<nsIDOMXULControlElement> Element::AsXULControl() {
|
||
nsCOMPtr<nsIDOMXULControlElement> value;
|
||
GetCustomInterface(getter_AddRefs(value));
|
||
return value.forget();
|
||
}
|
||
|
||
already_AddRefed<nsIDOMXULMenuListElement> Element::AsXULMenuList() {
|
||
nsCOMPtr<nsIDOMXULMenuListElement> value;
|
||
GetCustomInterface(getter_AddRefs(value));
|
||
return value.forget();
|
||
}
|
||
|
||
already_AddRefed<nsIDOMXULMultiSelectControlElement>
|
||
Element::AsXULMultiSelectControl() {
|
||
nsCOMPtr<nsIDOMXULMultiSelectControlElement> value;
|
||
GetCustomInterface(getter_AddRefs(value));
|
||
return value.forget();
|
||
}
|
||
|
||
already_AddRefed<nsIDOMXULRadioGroupElement> Element::AsXULRadioGroup() {
|
||
nsCOMPtr<nsIDOMXULRadioGroupElement> value;
|
||
GetCustomInterface(getter_AddRefs(value));
|
||
return value.forget();
|
||
}
|
||
|
||
already_AddRefed<nsIDOMXULRelatedElement> Element::AsXULRelated() {
|
||
nsCOMPtr<nsIDOMXULRelatedElement> value;
|
||
GetCustomInterface(getter_AddRefs(value));
|
||
return value.forget();
|
||
}
|
||
|
||
already_AddRefed<nsIDOMXULSelectControlElement> Element::AsXULSelectControl() {
|
||
nsCOMPtr<nsIDOMXULSelectControlElement> value;
|
||
GetCustomInterface(getter_AddRefs(value));
|
||
return value.forget();
|
||
}
|
||
|
||
already_AddRefed<nsIDOMXULSelectControlItemElement>
|
||
Element::AsXULSelectControlItem() {
|
||
nsCOMPtr<nsIDOMXULSelectControlItemElement> value;
|
||
GetCustomInterface(getter_AddRefs(value));
|
||
return value.forget();
|
||
}
|
||
|
||
already_AddRefed<nsIBrowser> Element::AsBrowser() {
|
||
nsCOMPtr<nsIBrowser> value;
|
||
GetCustomInterface(getter_AddRefs(value));
|
||
return value.forget();
|
||
}
|
||
|
||
already_AddRefed<nsIAutoCompletePopup> Element::AsAutoCompletePopup() {
|
||
nsCOMPtr<nsIAutoCompletePopup> value;
|
||
GetCustomInterface(getter_AddRefs(value));
|
||
return value.forget();
|
||
}
|
||
|
||
nsPresContext* Element::GetPresContext(PresContextFor aFor) {
|
||
// Get the document
|
||
Document* doc =
|
||
(aFor == eForComposedDoc) ? GetComposedDoc() : GetUncomposedDoc();
|
||
if (doc) {
|
||
return doc->GetPresContext();
|
||
}
|
||
|
||
return nullptr;
|
||
}
|
||
|
||
MOZ_DEFINE_MALLOC_SIZE_OF(ServoElementMallocSizeOf)
|
||
MOZ_DEFINE_MALLOC_ENCLOSING_SIZE_OF(ServoElementMallocEnclosingSizeOf)
|
||
|
||
void Element::AddSizeOfExcludingThis(nsWindowSizes& aSizes,
|
||
size_t* aNodeSize) const {
|
||
FragmentOrElement::AddSizeOfExcludingThis(aSizes, aNodeSize);
|
||
*aNodeSize += mAttrs.SizeOfExcludingThis(aSizes.mState.mMallocSizeOf);
|
||
|
||
if (HasServoData()) {
|
||
// Measure the ElementData object itself.
|
||
aSizes.mLayoutElementDataObjects +=
|
||
aSizes.mState.mMallocSizeOf(mServoData.Get());
|
||
|
||
// Measure mServoData, excluding the ComputedValues. This measurement
|
||
// counts towards the element's size. We use ServoElementMallocSizeOf and
|
||
// ServoElementMallocEnclosingSizeOf rather than |aState.mMallocSizeOf| to
|
||
// better distinguish in DMD's output the memory measured within Servo
|
||
// code.
|
||
*aNodeSize += Servo_Element_SizeOfExcludingThisAndCVs(
|
||
ServoElementMallocSizeOf, ServoElementMallocEnclosingSizeOf,
|
||
&aSizes.mState.mSeenPtrs, this);
|
||
|
||
// Now measure just the ComputedValues (and style structs) under
|
||
// mServoData. This counts towards the relevant fields in |aSizes|.
|
||
if (auto* style = Servo_Element_GetMaybeOutOfDateStyle(this)) {
|
||
if (!aSizes.mState.HaveSeenPtr(style)) {
|
||
style->AddSizeOfIncludingThis(aSizes, &aSizes.mLayoutComputedValuesDom);
|
||
}
|
||
|
||
for (size_t i = 0; i < PseudoStyle::kEagerPseudoCount; i++) {
|
||
if (auto* style = Servo_Element_GetMaybeOutOfDatePseudoStyle(this, i)) {
|
||
if (!aSizes.mState.HaveSeenPtr(style)) {
|
||
style->AddSizeOfIncludingThis(aSizes,
|
||
&aSizes.mLayoutComputedValuesDom);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
#ifdef DEBUG
|
||
static bool BitsArePropagated(const Element* aElement, uint32_t aBits,
|
||
nsINode* aRestyleRoot) {
|
||
const Element* curr = aElement;
|
||
while (curr) {
|
||
if (curr == aRestyleRoot) {
|
||
return true;
|
||
}
|
||
if (!curr->HasAllFlags(aBits)) {
|
||
return false;
|
||
}
|
||
nsINode* parentNode = curr->GetParentNode();
|
||
curr = curr->GetFlattenedTreeParentElementForStyle();
|
||
MOZ_ASSERT_IF(!curr,
|
||
parentNode == aElement->OwnerDoc() ||
|
||
parentNode == parentNode->OwnerDoc()->GetRootElement());
|
||
}
|
||
return true;
|
||
}
|
||
#endif
|
||
|
||
static inline void AssertNoBitsPropagatedFrom(nsINode* aRoot) {
|
||
#ifdef DEBUG
|
||
if (!aRoot || !aRoot->IsElement()) {
|
||
return;
|
||
}
|
||
|
||
auto* element = aRoot->GetFlattenedTreeParentElementForStyle();
|
||
while (element) {
|
||
MOZ_ASSERT(!element->HasAnyOfFlags(Element::kAllServoDescendantBits));
|
||
element = element->GetFlattenedTreeParentElementForStyle();
|
||
}
|
||
#endif
|
||
}
|
||
|
||
// Sets `aBits` on `aElement` and all of its flattened-tree ancestors up to and
|
||
// including aStopAt or the root element (whichever is encountered first), and
|
||
// as long as `aBitsToStopAt` isn't found anywhere in the chain.
|
||
static inline Element* PropagateBits(Element* aElement, uint32_t aBits,
|
||
nsINode* aStopAt, uint32_t aBitsToStopAt) {
|
||
Element* curr = aElement;
|
||
while (curr && !curr->HasAllFlags(aBitsToStopAt)) {
|
||
curr->SetFlags(aBits);
|
||
if (curr == aStopAt) {
|
||
break;
|
||
}
|
||
curr = curr->GetFlattenedTreeParentElementForStyle();
|
||
}
|
||
|
||
if (aBitsToStopAt != aBits && curr) {
|
||
curr->SetFlags(aBits);
|
||
}
|
||
|
||
return curr;
|
||
}
|
||
|
||
// Notes that a given element is "dirty" with respect to the given descendants
|
||
// bit (which may be one of dirty descendants, dirty animation descendants, or
|
||
// need frame construction for descendants).
|
||
//
|
||
// This function operates on the dirty element itself, despite the fact that the
|
||
// bits are generally used to describe descendants. This allows restyle roots
|
||
// to be scoped as tightly as possible. On the first call to NoteDirtyElement
|
||
// since the last restyle, we don't set any descendant bits at all, and just set
|
||
// the element as the restyle root.
|
||
//
|
||
// Because the style traversal handles multiple tasks (styling,
|
||
// animation-ticking, and lazy frame construction), there are potentially three
|
||
// separate kinds of dirtiness to track. Rather than maintaining three separate
|
||
// restyle roots, we use a single root, and always bubble it up to be the
|
||
// nearest common ancestor of all the dirty content in the tree. This means that
|
||
// we need to track the types of dirtiness that the restyle root corresponds to,
|
||
// so SetServoRestyleRoot accepts a bitfield along with an element.
|
||
//
|
||
// The overall algorithm is as follows:
|
||
// * When the first dirty element is noted, we just set as the restyle root.
|
||
// * When additional dirty elements are noted, we propagate the given bit up
|
||
// the tree, until we either reach the restyle root or the document root.
|
||
// * If we reach the document root, we then propagate the bits associated with
|
||
// the restyle root up the tree until we cross the path of the new root. Once
|
||
// we find this common ancestor, we record it as the restyle root, and then
|
||
// clear the bits between the new restyle root and the document root.
|
||
// * If we have dirty content beneath multiple "document style traversal roots"
|
||
// (which are the main DOM + each piece of document-level native-anoymous
|
||
// content), we set the restyle root to the nsINode of the document itself.
|
||
// This is the bail-out case where we traverse everything.
|
||
//
|
||
// Note that, since we track a root, we try to optimize the case where an
|
||
// element under the current root is dirtied, that's why we don't trivially use
|
||
// `nsContentUtils::GetCommonFlattenedTreeAncestorForStyle`.
|
||
static void NoteDirtyElement(Element* aElement, uint32_t aBits) {
|
||
MOZ_ASSERT(aElement->IsInComposedDoc());
|
||
|
||
// Check the existing root early on, since it may allow us to short-circuit
|
||
// before examining the parent chain.
|
||
Document* doc = aElement->GetComposedDoc();
|
||
nsINode* existingRoot = doc->GetServoRestyleRoot();
|
||
if (existingRoot == aElement) {
|
||
doc->SetServoRestyleRootDirtyBits(doc->GetServoRestyleRootDirtyBits() |
|
||
aBits);
|
||
return;
|
||
}
|
||
|
||
nsINode* parent = aElement->GetFlattenedTreeParentNodeForStyle();
|
||
if (!parent) {
|
||
// The element is not in the flattened tree, bail.
|
||
return;
|
||
}
|
||
|
||
if (MOZ_LIKELY(parent->IsElement())) {
|
||
// If our parent is unstyled, we can inductively assume that it will be
|
||
// traversed when the time is right, and that the traversal will reach us
|
||
// when it happens. Nothing left to do.
|
||
if (!parent->AsElement()->HasServoData()) {
|
||
return;
|
||
}
|
||
|
||
// Similarly, if our parent already has the bit we're propagating, we can
|
||
// assume everything is already set up.
|
||
if (parent->HasAllFlags(aBits)) {
|
||
return;
|
||
}
|
||
|
||
// If the parent is styled but is display:none, we're done.
|
||
//
|
||
// We can't check for a frame here, since <frame> elements inside <frameset>
|
||
// still need to generate a frame, even if they're display: none. :(
|
||
//
|
||
// The servo traversal doesn't keep style data under display: none subtrees,
|
||
// so in order for it to not need to cleanup each time anything happens in a
|
||
// display: none subtree, we keep it clean.
|
||
//
|
||
// Also, we can't be much more smarter about using the parent's frame in
|
||
// order to avoid work here, because since the style system keeps style data
|
||
// in, e.g., subtrees under a leaf frame, missing restyles and such in there
|
||
// has observable behavior via getComputedStyle, for example.
|
||
if (Servo_Element_IsDisplayNone(parent->AsElement())) {
|
||
return;
|
||
}
|
||
}
|
||
|
||
if (PresShell* presShell = doc->GetPresShell()) {
|
||
presShell->EnsureStyleFlush();
|
||
}
|
||
|
||
MOZ_ASSERT(parent->IsElement() || parent == doc);
|
||
|
||
// The bit checks below rely on this to arrive to useful conclusions about the
|
||
// shape of the tree.
|
||
AssertNoBitsPropagatedFrom(existingRoot);
|
||
|
||
// If there's no existing restyle root, or if the root is already aElement,
|
||
// just note the root+bits and return.
|
||
if (!existingRoot) {
|
||
doc->SetServoRestyleRoot(aElement, aBits);
|
||
return;
|
||
}
|
||
|
||
// There is an existing restyle root - walk up the tree from our element,
|
||
// propagating bits as we go.
|
||
const bool reachedDocRoot =
|
||
!parent->IsElement() ||
|
||
!PropagateBits(parent->AsElement(), aBits, existingRoot, aBits);
|
||
|
||
uint32_t existingBits = doc->GetServoRestyleRootDirtyBits();
|
||
if (!reachedDocRoot || existingRoot == doc) {
|
||
// We're a descendant of the existing root. All that's left to do is to
|
||
// make sure the bit we propagated is also registered on the root.
|
||
doc->SetServoRestyleRoot(existingRoot, existingBits | aBits);
|
||
} else {
|
||
// We reached the root without crossing the pre-existing restyle root. We
|
||
// now need to find the nearest common ancestor, so climb up from the
|
||
// existing root, extending bits along the way.
|
||
Element* rootParent = existingRoot->GetFlattenedTreeParentElementForStyle();
|
||
// We can stop at the first occurrence of `aBits` in order to find the
|
||
// common ancestor.
|
||
if (Element* commonAncestor =
|
||
PropagateBits(rootParent, existingBits, aElement, aBits)) {
|
||
MOZ_ASSERT(commonAncestor == aElement ||
|
||
commonAncestor ==
|
||
nsContentUtils::GetCommonFlattenedTreeAncestorForStyle(
|
||
aElement, rootParent));
|
||
|
||
// We found a common ancestor. Make that the new style root, and clear the
|
||
// bits between the new style root and the document root.
|
||
doc->SetServoRestyleRoot(commonAncestor, existingBits | aBits);
|
||
Element* curr = commonAncestor;
|
||
while ((curr = curr->GetFlattenedTreeParentElementForStyle())) {
|
||
MOZ_ASSERT(curr->HasAllFlags(aBits));
|
||
curr->UnsetFlags(aBits);
|
||
}
|
||
AssertNoBitsPropagatedFrom(commonAncestor);
|
||
} else {
|
||
// We didn't find a common ancestor element. That means we're descended
|
||
// from two different document style roots, so the common ancestor is the
|
||
// document.
|
||
doc->SetServoRestyleRoot(doc, existingBits | aBits);
|
||
}
|
||
}
|
||
|
||
// See the comment in Document::SetServoRestyleRoot about the !IsElement()
|
||
// check there. Same justification here.
|
||
MOZ_ASSERT(aElement == doc->GetServoRestyleRoot() ||
|
||
!doc->GetServoRestyleRoot()->IsElement() ||
|
||
nsContentUtils::ContentIsFlattenedTreeDescendantOfForStyle(
|
||
aElement, doc->GetServoRestyleRoot()));
|
||
MOZ_ASSERT(aElement == doc->GetServoRestyleRoot() ||
|
||
!doc->GetServoRestyleRoot()->IsElement() || !parent->IsElement() ||
|
||
BitsArePropagated(parent->AsElement(), aBits,
|
||
doc->GetServoRestyleRoot()));
|
||
MOZ_ASSERT(doc->GetServoRestyleRootDirtyBits() & aBits);
|
||
}
|
||
|
||
void Element::NoteDirtySubtreeForServo() {
|
||
MOZ_ASSERT(IsInComposedDoc());
|
||
MOZ_ASSERT(HasServoData());
|
||
|
||
Document* doc = GetComposedDoc();
|
||
nsINode* existingRoot = doc->GetServoRestyleRoot();
|
||
uint32_t existingBits =
|
||
existingRoot ? doc->GetServoRestyleRootDirtyBits() : 0;
|
||
|
||
if (existingRoot && existingRoot->IsElement() && existingRoot != this &&
|
||
nsContentUtils::ContentIsFlattenedTreeDescendantOfForStyle(
|
||
existingRoot->AsElement(), this)) {
|
||
PropagateBits(
|
||
existingRoot->AsElement()->GetFlattenedTreeParentElementForStyle(),
|
||
existingBits, this, existingBits);
|
||
|
||
doc->ClearServoRestyleRoot();
|
||
}
|
||
|
||
NoteDirtyElement(this,
|
||
existingBits | ELEMENT_HAS_DIRTY_DESCENDANTS_FOR_SERVO);
|
||
}
|
||
|
||
void Element::NoteDirtyForServo() {
|
||
NoteDirtyElement(this, ELEMENT_HAS_DIRTY_DESCENDANTS_FOR_SERVO);
|
||
}
|
||
|
||
void Element::NoteAnimationOnlyDirtyForServo() {
|
||
NoteDirtyElement(this,
|
||
ELEMENT_HAS_ANIMATION_ONLY_DIRTY_DESCENDANTS_FOR_SERVO);
|
||
}
|
||
|
||
void Element::NoteDescendantsNeedFramesForServo() {
|
||
// Since lazy frame construction can be required for non-element nodes, this
|
||
// Note() method operates on the parent of the frame-requiring content, unlike
|
||
// the other Note() methods above (which operate directly on the element that
|
||
// needs processing).
|
||
NoteDirtyElement(this, NODE_DESCENDANTS_NEED_FRAMES);
|
||
SetFlags(NODE_DESCENDANTS_NEED_FRAMES);
|
||
}
|
||
|
||
double Element::FirstLineBoxBSize() const {
|
||
const nsBlockFrame* frame = do_QueryFrame(GetPrimaryFrame());
|
||
if (!frame) {
|
||
return 0.0;
|
||
}
|
||
nsBlockFrame::ConstLineIterator line = frame->LinesBegin();
|
||
nsBlockFrame::ConstLineIterator lineEnd = frame->LinesEnd();
|
||
return line != lineEnd
|
||
? nsPresContext::AppUnitsToDoubleCSSPixels(line->BSize())
|
||
: 0.0;
|
||
}
|
||
|
||
// static
|
||
nsAtom* Element::GetEventNameForAttr(nsAtom* aAttr) {
|
||
if (aAttr == nsGkAtoms::onwebkitanimationend) {
|
||
return nsGkAtoms::onwebkitAnimationEnd;
|
||
}
|
||
if (aAttr == nsGkAtoms::onwebkitanimationiteration) {
|
||
return nsGkAtoms::onwebkitAnimationIteration;
|
||
}
|
||
if (aAttr == nsGkAtoms::onwebkitanimationstart) {
|
||
return nsGkAtoms::onwebkitAnimationStart;
|
||
}
|
||
if (aAttr == nsGkAtoms::onwebkittransitionend) {
|
||
return nsGkAtoms::onwebkitTransitionEnd;
|
||
}
|
||
return aAttr;
|
||
}
|
||
|
||
void Element::RegUnRegAccessKey(bool aDoReg) {
|
||
// first check to see if we have an access key
|
||
nsAutoString accessKey;
|
||
GetAttr(kNameSpaceID_None, nsGkAtoms::accesskey, accessKey);
|
||
if (accessKey.IsEmpty()) {
|
||
return;
|
||
}
|
||
|
||
// We have an access key, so get the ESM from the pres context.
|
||
if (nsPresContext* presContext = GetPresContext(eForComposedDoc)) {
|
||
EventStateManager* esm = presContext->EventStateManager();
|
||
|
||
// Register or unregister as appropriate.
|
||
if (aDoReg) {
|
||
esm->RegisterAccessKey(this, (uint32_t)accessKey.First());
|
||
} else {
|
||
esm->UnregisterAccessKey(this, (uint32_t)accessKey.First());
|
||
}
|
||
}
|
||
}
|
||
|
||
} // namespace mozilla::dom
|