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gecko-dev/dom/base/nsCopySupport.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsCopySupport.h"
#include "nsIDocumentEncoder.h"
#include "nsISupports.h"
#include "nsIContent.h"
#include "nsIComponentManager.h"
#include "nsIServiceManager.h"
#include "nsIClipboard.h"
#include "nsIFormControl.h"
#include "nsISelection.h"
#include "nsWidgetsCID.h"
#include "nsXPCOM.h"
#include "nsISupportsPrimitives.h"
#include "nsIDOMRange.h"
#include "nsRange.h"
#include "imgIContainer.h"
#include "nsIPresShell.h"
#include "nsFocusManager.h"
#include "mozilla/dom/DataTransfer.h"
#include "nsIDocShell.h"
#include "nsIContentViewerEdit.h"
#include "nsIClipboardDragDropHooks.h"
#include "nsIClipboardDragDropHookList.h"
#include "nsIClipboardHelper.h"
#include "nsISelectionController.h"
#include "nsPIDOMWindow.h"
#include "nsIDocument.h"
#include "nsIDOMNode.h"
#include "nsIDOMElement.h"
#include "nsIDOMDocument.h"
#include "nsIHTMLDocument.h"
#include "nsGkAtoms.h"
#include "nsIFrame.h"
#include "nsIURI.h"
#include "nsISimpleEnumerator.h"
// image copy stuff
#include "nsIImageLoadingContent.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsContentUtils.h"
#include "nsContentCID.h"
#include "mozilla/ContentEvents.h"
#include "mozilla/dom/Element.h"
#include "mozilla/EventDispatcher.h"
#include "mozilla/Preferences.h"
#include "mozilla/dom/Selection.h"
#include "mozilla/IntegerRange.h"
using namespace mozilla;
using namespace mozilla::dom;
nsresult NS_NewDomSelection(nsISelection **aDomSelection);
static NS_DEFINE_CID(kCClipboardCID, NS_CLIPBOARD_CID);
static NS_DEFINE_CID(kCTransferableCID, NS_TRANSFERABLE_CID);
static NS_DEFINE_CID(kHTMLConverterCID, NS_HTMLFORMATCONVERTER_CID);
// copy string data onto the transferable
static nsresult AppendString(nsITransferable *aTransferable,
const nsAString& aString,
const char* aFlavor);
// copy HTML node data
static nsresult AppendDOMNode(nsITransferable *aTransferable,
nsINode* aDOMNode);
// Helper used for HTMLCopy and GetTransferableForSelection since both routines
// share common code.
static nsresult
SelectionCopyHelper(nsISelection *aSel, nsIDocument *aDoc,
bool doPutOnClipboard, int16_t aClipboardID,
uint32_t aFlags, nsITransferable ** aTransferable)
{
// Clear the output parameter for the transferable, if provided.
if (aTransferable) {
*aTransferable = nullptr;
}
nsresult rv;
nsCOMPtr<nsIDocumentEncoder> docEncoder;
docEncoder = do_CreateInstance(NS_HTMLCOPY_ENCODER_CONTRACTID);
NS_ENSURE_TRUE(docEncoder, NS_ERROR_FAILURE);
// note that we assign text/unicode as mime type, but in fact nsHTMLCopyEncoder
// ignore it and use text/html or text/plain depending where the selection
// is. if it is a selection into input/textarea element or in a html content
// with pre-wrap style : text/plain. Otherwise text/html.
// see nsHTMLCopyEncoder::SetSelection
nsAutoString mimeType;
mimeType.AssignLiteral(kUnicodeMime);
// Do the first and potentially trial encoding as preformatted and raw.
uint32_t flags = aFlags | nsIDocumentEncoder::OutputPreformatted
| nsIDocumentEncoder::OutputRaw
| nsIDocumentEncoder::OutputForPlainTextClipboardCopy;
nsCOMPtr<nsIDOMDocument> domDoc = do_QueryInterface(aDoc);
NS_ASSERTION(domDoc, "Need a document");
rv = docEncoder->Init(domDoc, mimeType, flags);
NS_ENSURE_SUCCESS(rv, rv);
rv = docEncoder->SetSelection(aSel);
NS_ENSURE_SUCCESS(rv, rv);
// SetSelection set the mime type to text/plain if the selection is inside a
// text widget.
rv = docEncoder->GetMimeType(mimeType);
NS_ENSURE_SUCCESS(rv, rv);
bool selForcedTextPlain = mimeType.EqualsLiteral(kTextMime);
nsAutoString buf;
rv = docEncoder->EncodeToString(buf);
NS_ENSURE_SUCCESS(rv, rv);
rv = docEncoder->GetMimeType(mimeType);
NS_ENSURE_SUCCESS(rv, rv);
if (!selForcedTextPlain && mimeType.EqualsLiteral(kTextMime)) {
// SetSelection and EncodeToString use this case to signal that text/plain
// was forced because the document is either not an nsIHTMLDocument or it's
// XHTML. We want to pretty print XHTML but not non-nsIHTMLDocuments.
nsCOMPtr<nsIHTMLDocument> htmlDoc = do_QueryInterface(aDoc);
if (!htmlDoc) {
selForcedTextPlain = true;
}
}
// The mime type is ultimately text/html if the encoder successfully encoded
// the selection as text/html.
bool encodedTextHTML = mimeType.EqualsLiteral(kHTMLMime);
// First, prepare the text/plain clipboard flavor.
nsAutoString textPlainBuf;
if (selForcedTextPlain) {
// Nothing to do. buf contains the final, preformatted, raw text/plain.
textPlainBuf.Assign(buf);
} else {
// Redo the encoding, but this time use pretty printing.
flags =
nsIDocumentEncoder::OutputSelectionOnly |
nsIDocumentEncoder::OutputAbsoluteLinks |
nsIDocumentEncoder::SkipInvisibleContent |
nsIDocumentEncoder::OutputDropInvisibleBreak |
(aFlags & (nsIDocumentEncoder::OutputNoScriptContent |
nsIDocumentEncoder::OutputRubyAnnotation));
mimeType.AssignLiteral(kTextMime);
rv = docEncoder->Init(domDoc, mimeType, flags);
NS_ENSURE_SUCCESS(rv, rv);
rv = docEncoder->SetSelection(aSel);
NS_ENSURE_SUCCESS(rv, rv);
rv = docEncoder->EncodeToString(textPlainBuf);
NS_ENSURE_SUCCESS(rv, rv);
}
// Second, prepare the text/html flavor.
nsAutoString textHTMLBuf;
nsAutoString htmlParentsBuf;
nsAutoString htmlInfoBuf;
if (encodedTextHTML) {
// Redo the encoding, but this time use the passed-in flags.
// Don't allow wrapping of CJK strings.
mimeType.AssignLiteral(kHTMLMime);
rv = docEncoder->Init(domDoc, mimeType,
aFlags |
nsIDocumentEncoder::OutputDisallowLineBreaking);
NS_ENSURE_SUCCESS(rv, rv);
rv = docEncoder->SetSelection(aSel);
NS_ENSURE_SUCCESS(rv, rv);
rv = docEncoder->EncodeToStringWithContext(htmlParentsBuf, htmlInfoBuf,
textHTMLBuf);
NS_ENSURE_SUCCESS(rv, rv);
}
// Get the Clipboard
nsCOMPtr<nsIClipboard> clipboard;
if (doPutOnClipboard) {
clipboard = do_GetService(kCClipboardCID, &rv);
if (NS_FAILED(rv))
return rv;
}
if ((doPutOnClipboard && clipboard) || aTransferable != nullptr) {
// Create a transferable for putting data on the Clipboard
nsCOMPtr<nsITransferable> trans = do_CreateInstance(kCTransferableCID);
if (trans) {
trans->Init(aDoc->GetLoadContext());
if (encodedTextHTML) {
// Set up a format converter so that clipboard flavor queries work.
// This converter isn't really used for conversions.
nsCOMPtr<nsIFormatConverter> htmlConverter =
do_CreateInstance(kHTMLConverterCID);
trans->SetConverter(htmlConverter);
if (!textHTMLBuf.IsEmpty()) {
// Add the html DataFlavor to the transferable
rv = AppendString(trans, textHTMLBuf, kHTMLMime);
NS_ENSURE_SUCCESS(rv, rv);
}
// Add the htmlcontext DataFlavor to the transferable
// Even if parents is empty string, this flavor should
// be attached to the transferable
rv = AppendString(trans, htmlParentsBuf, kHTMLContext);
NS_ENSURE_SUCCESS(rv, rv);
if (!htmlInfoBuf.IsEmpty()) {
// Add the htmlinfo DataFlavor to the transferable
rv = AppendString(trans, htmlInfoBuf, kHTMLInfo);
NS_ENSURE_SUCCESS(rv, rv);
}
if (!textPlainBuf.IsEmpty()) {
// unicode text
// Add the unicode DataFlavor to the transferable
// If we didn't have this, then nsDataObj::GetData matches text/unicode against
// the kURLMime flavour which is not desirable (eg. when pasting into Notepad)
rv = AppendString(trans, textPlainBuf, kUnicodeMime);
NS_ENSURE_SUCCESS(rv, rv);
}
// Try and get source URI of the items that are being dragged
nsIURI *uri = aDoc->GetDocumentURI();
if (uri) {
nsAutoCString spec;
uri->GetSpec(spec);
if (!spec.IsEmpty()) {
nsAutoString shortcut;
AppendUTF8toUTF16(spec, shortcut);
// Add the URL DataFlavor to the transferable. Don't use kURLMime, as it will
// cause an unnecessary UniformResourceLocator to be added which confuses
// some apps eg. Outlook 2000 - (See Bug 315370). Don't use
// kURLDataMime, as it will cause a bogus 'url ' flavor to
// show up on the Mac clipboard, confusing other apps, like
// Terminal (see bug 336012).
rv = AppendString(trans, shortcut, kURLPrivateMime);
NS_ENSURE_SUCCESS(rv, rv);
}
}
} else {
if (!textPlainBuf.IsEmpty()) {
// Add the unicode DataFlavor to the transferable
rv = AppendString(trans, textPlainBuf, kUnicodeMime);
NS_ENSURE_SUCCESS(rv, rv);
}
}
if (doPutOnClipboard && clipboard) {
bool actuallyPutOnClipboard = true;
nsCopySupport::DoHooks(aDoc, trans, &actuallyPutOnClipboard);
// put the transferable on the clipboard
if (actuallyPutOnClipboard)
clipboard->SetData(trans, nullptr, aClipboardID);
}
// Return the transferable to the caller if requested.
if (aTransferable != nullptr) {
trans.swap(*aTransferable);
}
}
}
return rv;
}
nsresult
nsCopySupport::HTMLCopy(nsISelection* aSel, nsIDocument* aDoc,
int16_t aClipboardID, bool aWithRubyAnnotation)
{
uint32_t flags = nsIDocumentEncoder::SkipInvisibleContent;
if (aWithRubyAnnotation) {
flags |= nsIDocumentEncoder::OutputRubyAnnotation;
}
return SelectionCopyHelper(aSel, aDoc, true, aClipboardID, flags, nullptr);
}
nsresult
nsCopySupport::GetTransferableForSelection(nsISelection* aSel,
nsIDocument* aDoc,
nsITransferable** aTransferable)
{
return SelectionCopyHelper(aSel, aDoc, false, 0,
nsIDocumentEncoder::SkipInvisibleContent,
aTransferable);
}
nsresult
nsCopySupport::GetTransferableForNode(nsINode* aNode,
nsIDocument* aDoc,
nsITransferable** aTransferable)
{
nsCOMPtr<nsISelection> selection;
// Make a temporary selection with aNode in a single range.
nsresult rv = NS_NewDomSelection(getter_AddRefs(selection));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIDOMNode> node = do_QueryInterface(aNode);
NS_ENSURE_TRUE(node, NS_ERROR_FAILURE);
RefPtr<nsRange> range = new nsRange(aNode);
rv = range->SelectNode(node);
NS_ENSURE_SUCCESS(rv, rv);
rv = selection->AddRange(range);
NS_ENSURE_SUCCESS(rv, rv);
// It's not the primary selection - so don't skip invisible content.
uint32_t flags = 0;
return SelectionCopyHelper(selection, aDoc, false, 0, flags,
aTransferable);
}
nsresult nsCopySupport::DoHooks(nsIDocument *aDoc, nsITransferable *aTrans,
bool *aDoPutOnClipboard)
{
NS_ENSURE_ARG(aDoc);
*aDoPutOnClipboard = true;
nsCOMPtr<nsISupports> container = aDoc->GetContainer();
nsCOMPtr<nsIClipboardDragDropHookList> hookObj = do_GetInterface(container);
if (!hookObj) return NS_ERROR_FAILURE;
nsCOMPtr<nsISimpleEnumerator> enumerator;
hookObj->GetHookEnumerator(getter_AddRefs(enumerator));
if (!enumerator) return NS_ERROR_FAILURE;
// the logic here should follow the behavior specified in
// nsIClipboardDragDropHooks.h
nsCOMPtr<nsIClipboardDragDropHooks> override;
nsCOMPtr<nsISupports> isupp;
bool hasMoreHooks = false;
nsresult rv = NS_OK;
while (NS_SUCCEEDED(enumerator->HasMoreElements(&hasMoreHooks))
&& hasMoreHooks)
{
rv = enumerator->GetNext(getter_AddRefs(isupp));
if (NS_FAILED(rv)) break;
override = do_QueryInterface(isupp);
if (override)
{
#ifdef DEBUG
nsresult hookResult =
#endif
override->OnCopyOrDrag(nullptr, aTrans, aDoPutOnClipboard);
NS_ASSERTION(NS_SUCCEEDED(hookResult), "OnCopyOrDrag hook failed");
if (!*aDoPutOnClipboard)
break;
}
}
return rv;
}
nsresult
nsCopySupport::GetContents(const nsACString& aMimeType, uint32_t aFlags, nsISelection *aSel, nsIDocument *aDoc, nsAString& outdata)
{
nsresult rv = NS_OK;
nsCOMPtr<nsIDocumentEncoder> docEncoder;
nsAutoCString encoderContractID(NS_DOC_ENCODER_CONTRACTID_BASE);
encoderContractID.Append(aMimeType);
docEncoder = do_CreateInstance(encoderContractID.get());
NS_ENSURE_TRUE(docEncoder, NS_ERROR_FAILURE);
uint32_t flags = aFlags | nsIDocumentEncoder::SkipInvisibleContent;
if (aMimeType.EqualsLiteral("text/plain"))
flags |= nsIDocumentEncoder::OutputPreformatted;
NS_ConvertASCIItoUTF16 unicodeMimeType(aMimeType);
nsCOMPtr<nsIDOMDocument> domDoc = do_QueryInterface(aDoc);
NS_ASSERTION(domDoc, "Need a document");
rv = docEncoder->Init(domDoc, unicodeMimeType, flags);
if (NS_FAILED(rv)) return rv;
if (aSel)
{
rv = docEncoder->SetSelection(aSel);
if (NS_FAILED(rv)) return rv;
}
// encode the selection
return docEncoder->EncodeToString(outdata);
}
nsresult
nsCopySupport::ImageCopy(nsIImageLoadingContent* aImageElement,
nsILoadContext* aLoadContext,
int32_t aCopyFlags)
{
nsresult rv;
// create a transferable for putting data on the Clipboard
nsCOMPtr<nsITransferable> trans(do_CreateInstance(kCTransferableCID, &rv));
NS_ENSURE_SUCCESS(rv, rv);
trans->Init(aLoadContext);
if (aCopyFlags & nsIContentViewerEdit::COPY_IMAGE_TEXT) {
// get the location from the element
nsCOMPtr<nsIURI> uri;
rv = aImageElement->GetCurrentURI(getter_AddRefs(uri));
NS_ENSURE_SUCCESS(rv, rv);
NS_ENSURE_TRUE(uri, NS_ERROR_FAILURE);
nsAutoCString location;
rv = uri->GetSpec(location);
NS_ENSURE_SUCCESS(rv, rv);
// append the string to the transferable
rv = AppendString(trans, NS_ConvertUTF8toUTF16(location), kUnicodeMime);
NS_ENSURE_SUCCESS(rv, rv);
}
if (aCopyFlags & nsIContentViewerEdit::COPY_IMAGE_HTML) {
// append HTML data to the transferable
nsCOMPtr<nsINode> node(do_QueryInterface(aImageElement, &rv));
NS_ENSURE_SUCCESS(rv, rv);
rv = AppendDOMNode(trans, node);
NS_ENSURE_SUCCESS(rv, rv);
}
if (aCopyFlags & nsIContentViewerEdit::COPY_IMAGE_DATA) {
// get the image data from the element
nsCOMPtr<imgIContainer> image =
nsContentUtils::GetImageFromContent(aImageElement);
NS_ENSURE_TRUE(image, NS_ERROR_FAILURE);
nsCOMPtr<nsISupportsInterfacePointer>
imgPtr(do_CreateInstance(NS_SUPPORTS_INTERFACE_POINTER_CONTRACTID, &rv));
NS_ENSURE_SUCCESS(rv, rv);
rv = imgPtr->SetData(image);
NS_ENSURE_SUCCESS(rv, rv);
// copy the image data onto the transferable
rv = trans->SetTransferData(kNativeImageMime, imgPtr,
sizeof(nsISupports*));
NS_ENSURE_SUCCESS(rv, rv);
}
// get clipboard
nsCOMPtr<nsIClipboard> clipboard(do_GetService(kCClipboardCID, &rv));
NS_ENSURE_SUCCESS(rv, rv);
// check whether the system supports the selection clipboard or not.
bool selectionSupported;
rv = clipboard->SupportsSelectionClipboard(&selectionSupported);
NS_ENSURE_SUCCESS(rv, rv);
// put the transferable on the clipboard
if (selectionSupported) {
rv = clipboard->SetData(trans, nullptr, nsIClipboard::kSelectionClipboard);
NS_ENSURE_SUCCESS(rv, rv);
}
return clipboard->SetData(trans, nullptr, nsIClipboard::kGlobalClipboard);
}
static nsresult AppendString(nsITransferable *aTransferable,
const nsAString& aString,
const char* aFlavor)
{
nsresult rv;
nsCOMPtr<nsISupportsString>
data(do_CreateInstance(NS_SUPPORTS_STRING_CONTRACTID, &rv));
NS_ENSURE_SUCCESS(rv, rv);
rv = data->SetData(aString);
NS_ENSURE_SUCCESS(rv, rv);
rv = aTransferable->AddDataFlavor(aFlavor);
NS_ENSURE_SUCCESS(rv, rv);
return aTransferable->SetTransferData(aFlavor, data,
aString.Length() * sizeof(char16_t));
}
static nsresult AppendDOMNode(nsITransferable *aTransferable,
nsINode *aDOMNode)
{
nsresult rv;
// selializer
nsCOMPtr<nsIDocumentEncoder>
docEncoder(do_CreateInstance(NS_HTMLCOPY_ENCODER_CONTRACTID, &rv));
NS_ENSURE_SUCCESS(rv, rv);
// get document for the encoder
nsCOMPtr<nsIDocument> document = aDOMNode->OwnerDoc();
// Note that XHTML is not counted as HTML here, because we can't copy it
// properly (all the copy code for non-plaintext assumes using HTML
// serializers and parsers is OK, and those mess up XHTML).
nsCOMPtr<nsIHTMLDocument> htmlDoc = do_QueryInterface(document, &rv);
NS_ENSURE_SUCCESS(rv, NS_OK);
NS_ENSURE_TRUE(document->IsHTMLDocument(), NS_OK);
// init encoder with document and node
rv = docEncoder->NativeInit(document, NS_LITERAL_STRING(kHTMLMime),
nsIDocumentEncoder::OutputAbsoluteLinks |
nsIDocumentEncoder::OutputEncodeW3CEntities);
NS_ENSURE_SUCCESS(rv, rv);
rv = docEncoder->SetNativeNode(aDOMNode);
NS_ENSURE_SUCCESS(rv, rv);
// serialize to string
nsAutoString html, context, info;
rv = docEncoder->EncodeToStringWithContext(context, info, html);
NS_ENSURE_SUCCESS(rv, rv);
// copy them to the transferable
if (!html.IsEmpty()) {
rv = AppendString(aTransferable, html, kHTMLMime);
NS_ENSURE_SUCCESS(rv, rv);
}
if (!info.IsEmpty()) {
rv = AppendString(aTransferable, info, kHTMLInfo);
NS_ENSURE_SUCCESS(rv, rv);
}
// add a special flavor, even if we don't have html context data
return AppendString(aTransferable, context, kHTMLContext);
}
nsIContent*
nsCopySupport::GetSelectionForCopy(nsIDocument* aDocument, nsISelection** aSelection)
{
*aSelection = nullptr;
nsIPresShell* presShell = aDocument->GetShell();
if (!presShell)
return nullptr;
nsCOMPtr<nsIContent> focusedContent;
nsCOMPtr<nsISelectionController> selectionController =
presShell->GetSelectionControllerForFocusedContent(
getter_AddRefs(focusedContent));
if (!selectionController) {
return nullptr;
}
selectionController->GetSelection(nsISelectionController::SELECTION_NORMAL,
aSelection);
return focusedContent;
}
bool
nsCopySupport::CanCopy(nsIDocument* aDocument)
{
if (!aDocument)
return false;
nsCOMPtr<nsISelection> sel;
GetSelectionForCopy(aDocument, getter_AddRefs(sel));
NS_ENSURE_TRUE(sel, false);
bool isCollapsed;
sel->GetIsCollapsed(&isCollapsed);
return !isCollapsed;
}
static bool
IsInsideRuby(nsINode* aNode)
{
for (; aNode; aNode = aNode->GetParent()) {
if (aNode->IsHTMLElement(nsGkAtoms::ruby)) {
return true;
}
}
return false;
}
static bool
IsSelectionInsideRuby(nsISelection* aSelection)
{
int32_t rangeCount;
nsresult rv = aSelection->GetRangeCount(&rangeCount);
if (NS_FAILED(rv)) {
return false;
}
for (auto i : MakeRange(rangeCount)) {
nsCOMPtr<nsIDOMRange> range;
aSelection->GetRangeAt(i, getter_AddRefs(range));
nsCOMPtr<nsIDOMNode> node;
range->GetCommonAncestorContainer(getter_AddRefs(node));
nsCOMPtr<nsINode> n = do_QueryInterface(node);
if (!IsInsideRuby(n)) {
return false;
}
}
return true;
}
bool
nsCopySupport::FireClipboardEvent(EventMessage aEventMessage,
int32_t aClipboardType,
nsIPresShell* aPresShell,
nsISelection* aSelection,
bool* aActionTaken)
{
if (aActionTaken) {
*aActionTaken = false;
}
NS_ASSERTION(aEventMessage == eCut || aEventMessage == eCopy ||
aEventMessage == ePaste,
"Invalid clipboard event type");
nsCOMPtr<nsIPresShell> presShell = aPresShell;
if (!presShell)
return false;
nsCOMPtr<nsIDocument> doc = presShell->GetDocument();
if (!doc)
return false;
nsCOMPtr<nsPIDOMWindowOuter> piWindow = doc->GetWindow();
if (!piWindow)
return false;
// if a selection was not supplied, try to find it
nsCOMPtr<nsIContent> content;
nsCOMPtr<nsISelection> sel = aSelection;
if (!sel)
content = GetSelectionForCopy(doc, getter_AddRefs(sel));
// retrieve the event target node from the start of the selection
nsresult rv;
if (sel) {
nsCOMPtr<nsIDOMRange> range;
rv = sel->GetRangeAt(0, getter_AddRefs(range));
if (NS_SUCCEEDED(rv) && range) {
nsCOMPtr<nsIDOMNode> startContainer;
range->GetStartContainer(getter_AddRefs(startContainer));
if (startContainer)
content = do_QueryInterface(startContainer);
}
}
// if no content node was set, just get the root
if (!content) {
content = doc->GetRootElement();
if (!content)
return false;
}
// It seems to be unsafe to fire an event handler during reflow (bug 393696)
if (!nsContentUtils::IsSafeToRunScript()) {
nsContentUtils::WarnScriptWasIgnored(doc);
return false;
}
nsCOMPtr<nsIDocShell> docShell = piWindow->GetDocShell();
const bool chromeShell =
docShell && docShell->ItemType() == nsIDocShellTreeItem::typeChrome;
// next, fire the cut, copy or paste event
bool doDefault = true;
RefPtr<DataTransfer> clipboardData;
if (chromeShell || Preferences::GetBool("dom.event.clipboardevents.enabled", true)) {
clipboardData =
new DataTransfer(doc->GetScopeObject(), aEventMessage,
aEventMessage == ePaste, aClipboardType);
nsEventStatus status = nsEventStatus_eIgnore;
InternalClipboardEvent evt(true, aEventMessage);
evt.mClipboardData = clipboardData;
EventDispatcher::Dispatch(content, presShell->GetPresContext(), &evt,
nullptr, &status);
// If the event was cancelled, don't do the clipboard operation
doDefault = (status != nsEventStatus_eConsumeNoDefault);
}
// No need to do anything special during a paste. Either an event listener
// took care of it and cancelled the event, or the caller will handle it.
// Return true to indicate that the event wasn't cancelled.
if (aEventMessage == ePaste) {
// Clear and mark the clipboardData as readonly. This prevents someone
// from reading the clipboard contents after the paste event has fired.
if (clipboardData) {
clipboardData->ClearAll();
clipboardData->SetReadOnly();
}
if (aActionTaken) {
*aActionTaken = true;
}
return doDefault;
}
// Update the presentation in case the event handler modified the selection,
// see bug 602231.
presShell->FlushPendingNotifications(Flush_Frames);
if (presShell->IsDestroying())
return false;
// if the event was not cancelled, do the default copy. If the event was cancelled,
// use the data added to the data transfer and copy that instead.
uint32_t count = 0;
if (doDefault) {
// find the focused node
nsCOMPtr<nsIContent> srcNode = content;
if (content->IsInNativeAnonymousSubtree()) {
srcNode = content->FindFirstNonChromeOnlyAccessContent();
}
// check if we are looking at a password input
nsCOMPtr<nsIFormControl> formControl = do_QueryInterface(srcNode);
if (formControl) {
if (formControl->GetType() == NS_FORM_INPUT_PASSWORD) {
return false;
}
}
// when cutting non-editable content, do nothing
// XXX this is probably the wrong editable flag to check
if (aEventMessage != eCut || content->IsEditable()) {
// get the data from the selection if any
bool isCollapsed;
sel->GetIsCollapsed(&isCollapsed);
if (isCollapsed) {
if (aActionTaken) {
*aActionTaken = true;
}
return false;
}
// XXX Code which decides whether we should copy text with ruby
// annotation is currenct depending on whether each range of the
// selection is inside a same ruby container. But we really should
// expose the full functionality in browser. See bug 1130891.
bool withRubyAnnotation = IsSelectionInsideRuby(sel);
// call the copy code
rv = HTMLCopy(sel, doc, aClipboardType, withRubyAnnotation);
if (NS_FAILED(rv)) {
return false;
}
} else {
return false;
}
} else if (clipboardData) {
// check to see if any data was put on the data transfer.
clipboardData->GetMozItemCount(&count);
if (count) {
nsCOMPtr<nsIClipboard> clipboard(do_GetService("@mozilla.org/widget/clipboard;1"));
NS_ENSURE_TRUE(clipboard, false);
nsCOMPtr<nsITransferable> transferable =
clipboardData->GetTransferable(0, doc->GetLoadContext());
NS_ENSURE_TRUE(transferable, false);
// put the transferable on the clipboard
rv = clipboard->SetData(transferable, nullptr, aClipboardType);
if (NS_FAILED(rv)) {
return false;
}
}
}
// Now that we have copied, update the clipboard commands. This should have
// the effect of updating the enabled state of the paste menu item.
if (doDefault || count) {
piWindow->UpdateCommands(NS_LITERAL_STRING("clipboard"), nullptr, 0);
}
if (aActionTaken) {
*aActionTaken = true;
}
return doDefault;
}
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