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gecko-dev/editor/libeditor/HTMLEditorDataTransfer.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 sw=2 et tw=78: */
/* 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 "HTMLEditor.h"
#include <string.h>
#include "EditAction.h"
#include "EditorDOMPoint.h"
#include "EditorUtils.h"
#include "HTMLEditHelpers.h"
#include "HTMLEditUtils.h"
#include "InternetCiter.h"
#include "SelectionState.h"
#include "TypeInState.h"
#include "WSRunObject.h"
#include "mozilla/dom/Comment.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/DataTransfer.h"
#include "mozilla/dom/DocumentFragment.h"
#include "mozilla/dom/DOMException.h"
#include "mozilla/dom/DOMStringList.h"
#include "mozilla/dom/DOMStringList.h"
#include "mozilla/dom/Event.h"
#include "mozilla/dom/FileReader.h"
#include "mozilla/dom/Selection.h"
#include "mozilla/dom/StaticRange.h"
#include "mozilla/dom/WorkerRef.h"
#include "mozilla/ArrayUtils.h"
#include "mozilla/Attributes.h"
#include "mozilla/Base64.h"
#include "mozilla/BasicEvents.h"
#include "mozilla/DebugOnly.h"
#include "mozilla/OwningNonNull.h"
#include "mozilla/Preferences.h"
#include "mozilla/Result.h"
#include "nsAString.h"
#include "nsCOMPtr.h"
#include "nsCRTGlue.h" // for CRLF
#include "nsComponentManagerUtils.h"
#include "nsIScriptError.h"
#include "nsContentUtils.h"
#include "nsDebug.h"
#include "nsDependentSubstring.h"
#include "nsError.h"
#include "nsGkAtoms.h"
#include "nsIClipboard.h"
#include "nsIContent.h"
#include "nsIDocumentEncoder.h"
#include "nsIFile.h"
#include "nsIInputStream.h"
#include "nsNameSpaceManager.h"
#include "nsINode.h"
#include "nsIParserUtils.h"
#include "nsIPrincipal.h"
#include "nsISupportsImpl.h"
#include "nsISupportsPrimitives.h"
#include "nsISupportsUtils.h"
#include "nsITransferable.h"
#include "nsIVariant.h"
#include "nsLinebreakConverter.h"
#include "nsLiteralString.h"
#include "nsNetUtil.h"
#include "nsPrintfCString.h"
#include "nsRange.h"
#include "nsReadableUtils.h"
#include "nsServiceManagerUtils.h"
#include "nsStreamUtils.h"
#include "nsString.h"
#include "nsStringFwd.h"
#include "nsStringIterator.h"
#include "nsTreeSanitizer.h"
#include "nsXPCOM.h"
#include "nscore.h"
#include "nsContentUtils.h"
#include "nsQueryObject.h"
class nsAtom;
class nsILoadContext;
namespace mozilla {
using namespace dom;
using EmptyCheckOption = HTMLEditUtils::EmptyCheckOption;
using LeafNodeType = HTMLEditUtils::LeafNodeType;
#define kInsertCookie "_moz_Insert Here_moz_"
// some little helpers
static bool FindIntegerAfterString(const char* aLeadingString,
const nsCString& aCStr,
int32_t& foundNumber);
static void RemoveFragComments(nsCString& aStr);
nsresult HTMLEditor::InsertDroppedDataTransferAsAction(
AutoEditActionDataSetter& aEditActionData, DataTransfer& aDataTransfer,
const EditorDOMPoint& aDroppedAt, nsIPrincipal* aSourcePrincipal) {
MOZ_ASSERT(aEditActionData.GetEditAction() == EditAction::eDrop);
MOZ_ASSERT(GetEditAction() == EditAction::eDrop);
MOZ_ASSERT(aDroppedAt.IsSet());
MOZ_ASSERT(aDataTransfer.MozItemCount() > 0);
aEditActionData.InitializeDataTransfer(&aDataTransfer);
RefPtr<StaticRange> targetRange = StaticRange::Create(
aDroppedAt.GetContainer(), aDroppedAt.Offset(), aDroppedAt.GetContainer(),
aDroppedAt.Offset(), IgnoreErrors());
NS_WARNING_ASSERTION(targetRange && targetRange->IsPositioned(),
"Why did we fail to create collapsed static range at "
"dropped position?");
if (targetRange && targetRange->IsPositioned()) {
aEditActionData.AppendTargetRange(*targetRange);
}
nsresult rv = aEditActionData.MaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"MaybeDispatchBeforeInputEvent() failed");
return rv;
}
uint32_t numItems = aDataTransfer.MozItemCount();
for (uint32_t i = 0; i < numItems; ++i) {
DebugOnly<nsresult> rvIgnored = InsertFromDataTransfer(
&aDataTransfer, i, aSourcePrincipal, aDroppedAt, false);
if (NS_WARN_IF(Destroyed())) {
return NS_OK;
}
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"HTMLEditor::InsertFromDataTransfer() failed, but ignored");
}
return NS_OK;
}
nsresult HTMLEditor::LoadHTML(const nsAString& aInputString) {
MOZ_ASSERT(IsEditActionDataAvailable());
if (NS_WARN_IF(!mInitSucceeded)) {
return NS_ERROR_NOT_INITIALIZED;
}
// force IME commit; set up rules sniffing and batching
DebugOnly<nsresult> rvIgnored = CommitComposition();
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"EditorBase::CommitComposition() failed, but ignored");
if (NS_WARN_IF(Destroyed())) {
return NS_ERROR_EDITOR_DESTROYED;
}
AutoPlaceholderBatch treatAsOneTransaction(
*this, ScrollSelectionIntoView::Yes, __FUNCTION__);
IgnoredErrorResult ignoredError;
AutoEditSubActionNotifier startToHandleEditSubAction(
*this, EditSubAction::eInsertHTMLSource, nsIEditor::eNext, ignoredError);
if (NS_WARN_IF(ignoredError.ErrorCodeIs(NS_ERROR_EDITOR_DESTROYED))) {
return ignoredError.StealNSResult();
}
NS_WARNING_ASSERTION(
!ignoredError.Failed(),
"HTMLEditor::OnStartToHandleTopLevelEditSubAction() failed, but ignored");
nsresult rv = EnsureNoPaddingBRElementForEmptyEditor();
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::EnsureNoPaddingBRElementForEmptyEditor() failed");
return rv;
}
// Delete Selection, but only if it isn't collapsed, see bug #106269
if (!SelectionRef().IsCollapsed()) {
nsresult rv = DeleteSelectionAsSubAction(eNone, eStrip);
if (NS_FAILED(rv)) {
NS_WARNING(
"EditorBase::DeleteSelectionAsSubAction(eNone, eStrip) failed");
return rv;
}
}
// Get the first range in the selection, for context:
RefPtr<const nsRange> range = SelectionRef().GetRangeAt(0);
if (NS_WARN_IF(!range)) {
return NS_ERROR_FAILURE;
}
// Create fragment for pasted HTML.
ErrorResult error;
RefPtr<DocumentFragment> documentFragment =
range->CreateContextualFragment(aInputString, error);
if (error.Failed()) {
NS_WARNING("nsRange::CreateContextualFragment() failed");
return error.StealNSResult();
}
// Put the fragment into the document at start of selection.
EditorDOMPoint pointToInsert(range->StartRef());
// XXX We need to make pointToInsert store offset for keeping traditional
// behavior since using only child node to pointing insertion point
// changes the behavior when inserted child is moved by mutation
// observer. We need to investigate what we should do here.
Unused << pointToInsert.Offset();
EditorDOMPoint pointToPutCaret;
for (nsCOMPtr<nsIContent> contentToInsert = documentFragment->GetFirstChild();
contentToInsert; contentToInsert = documentFragment->GetFirstChild()) {
CreateContentResult insertChildContentNodeResult =
InsertNodeWithTransaction(*contentToInsert, pointToInsert);
if (insertChildContentNodeResult.isErr()) {
NS_WARNING("EditorBase::InsertNodeWithTransaction() failed");
return insertChildContentNodeResult.unwrapErr();
}
insertChildContentNodeResult.MoveCaretPointTo(
pointToPutCaret, *this,
{SuggestCaret::OnlyIfHasSuggestion,
SuggestCaret::OnlyIfTransactionsAllowedToDoIt});
// XXX If the inserted node has been moved by mutation observer,
// incrementing offset will cause odd result. Next new node
// will be inserted after existing node and the offset will be
// overflown from the container node.
pointToInsert.Set(pointToInsert.GetContainer(), pointToInsert.Offset() + 1);
if (NS_WARN_IF(!pointToInsert.Offset())) {
// Append the remaining children to the container if offset is
// overflown.
pointToInsert.SetToEndOf(pointToInsert.GetContainer());
}
}
if (pointToPutCaret.IsSet()) {
nsresult rv = CollapseSelectionTo(pointToPutCaret);
if (MOZ_UNLIKELY(rv == NS_ERROR_EDITOR_DESTROYED)) {
NS_WARNING("EditorBase::CollapseSelectionTo() failed, but ignored");
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"EditorBase::CollapseSelectionTo() failed, but ignored");
}
return NS_OK;
}
NS_IMETHODIMP HTMLEditor::InsertHTML(const nsAString& aInString) {
nsresult rv = InsertHTMLAsAction(aInString);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"HTMLEditor::InsertHTMLAsAction() failed");
return rv;
}
nsresult HTMLEditor::InsertHTMLAsAction(const nsAString& aInString,
nsIPrincipal* aPrincipal) {
AutoEditActionDataSetter editActionData(*this, EditAction::eInsertHTML,
aPrincipal);
nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"CanHandleAndMaybeDispatchBeforeInputEvent(), failed");
return EditorBase::ToGenericNSResult(rv);
}
rv = DoInsertHTMLWithContext(aInString, u""_ns, u""_ns, u""_ns,
EditorDOMPoint(), true, true, false);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"HTMLEditor::DoInsertHTMLWithContext() failed");
return EditorBase::ToGenericNSResult(rv);
}
class MOZ_STACK_CLASS HTMLEditor::HTMLWithContextInserter final {
public:
MOZ_CAN_RUN_SCRIPT explicit HTMLWithContextInserter(HTMLEditor& aHTMLEditor)
: mHTMLEditor(aHTMLEditor) {}
HTMLWithContextInserter() = delete;
HTMLWithContextInserter(const HTMLWithContextInserter&) = delete;
HTMLWithContextInserter(HTMLWithContextInserter&&) = delete;
MOZ_CAN_RUN_SCRIPT nsresult Run(const nsAString& aInputString,
const nsAString& aContextStr,
const nsAString& aInfoStr,
const EditorDOMPoint& aPointToInsert,
bool aDoDeleteSelection, bool aTrustedInput,
bool aClearStyle);
private:
class FragmentFromPasteCreator;
class FragmentParser;
/**
* CollectTopMostChildContentsCompletelyInRange() collects topmost child
* contents which are completely in the given range.
* For example, if the range points a node with its container node, the
* result is only the node (meaning does not include its descendants).
* If the range starts start of a node and ends end of it, and if the node
* does not have children, returns no nodes, otherwise, if the node has
* some children, the result includes its all children (not including their
* descendants).
*
* @param aStartPoint Start point of the range.
* @param aEndPoint End point of the range.
* @param aOutArrayOfContents [Out] Topmost children which are completely in
* the range.
*/
static void CollectTopMostChildContentsCompletelyInRange(
const EditorRawDOMPoint& aStartPoint, const EditorRawDOMPoint& aEndPoint,
nsTArray<OwningNonNull<nsIContent>>& aOutArrayOfContents);
/**
* @return nullptr, if there's no invisible `<br>`.
*/
HTMLBRElement* GetInvisibleBRElementAtPoint(
const EditorDOMPoint& aPointToInsert) const;
EditorDOMPoint GetNewCaretPointAfterInsertingHTML(
const EditorDOMPoint& aLastInsertedPoint) const;
/**
* @return error result or the last inserted point. The latter is only set, if
* content was inserted.
*/
[[nodiscard]] MOZ_CAN_RUN_SCRIPT Result<EditorDOMPoint, nsresult>
InsertContents(
const EditorDOMPoint& aPointToInsert,
nsTArray<OwningNonNull<nsIContent>>& aArrayOfTopMostChildContents,
const nsINode* aFragmentAsNode);
/**
* @param aContextStr as indicated by nsITransferable's kHTMLContext.
* @param aInfoStr as indicated by nsITransferable's kHTMLInfo.
*/
nsresult CreateDOMFragmentFromPaste(
const nsAString& aInputString, const nsAString& aContextStr,
const nsAString& aInfoStr, nsCOMPtr<nsINode>* aOutFragNode,
nsCOMPtr<nsINode>* aOutStartNode, nsCOMPtr<nsINode>* aOutEndNode,
uint32_t* aOutStartOffset, uint32_t* aOutEndOffset,
bool aTrustedInput) const;
[[nodiscard]] MOZ_CAN_RUN_SCRIPT nsresult MoveCaretOutsideOfLink(
Element& aLinkElement, const EditorDOMPoint& aPointToPutCaret);
// MOZ_KNOWN_LIVE because this is set only by the constructor which is
// marked as MOZ_CAN_RUN_SCRIPT and this is allocated only in the stack.
MOZ_KNOWN_LIVE HTMLEditor& mHTMLEditor;
};
class MOZ_STACK_CLASS
HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator final {
public:
nsresult Run(const Document& aDocument, const nsAString& aInputString,
const nsAString& aContextStr, const nsAString& aInfoStr,
nsCOMPtr<nsINode>* aOutFragNode,
nsCOMPtr<nsINode>* aOutStartNode, nsCOMPtr<nsINode>* aOutEndNode,
bool aTrustedInput) const;
private:
nsresult CreateDocumentFragmentAndGetParentOfPastedHTMLInContext(
const Document& aDocument, const nsAString& aInputString,
const nsAString& aContextStr, bool aTrustedInput,
nsCOMPtr<nsINode>& aParentNodeOfPastedHTMLInContext,
RefPtr<DocumentFragment>& aDocumentFragmentToInsert) const;
static nsAtom* DetermineContextLocalNameForParsingPastedHTML(
const nsIContent* aParentContentOfPastedHTMLInContext);
static bool FindTargetNodeOfContextForPastedHTMLAndRemoveInsertionCookie(
nsINode& aStart, nsCOMPtr<nsINode>& aResult);
static bool IsInsertionCookie(const nsIContent& aContent);
/**
* @param aDocumentFragmentForContext contains the merged result.
*/
static nsresult MergeAndPostProcessFragmentsForPastedHTMLAndContext(
DocumentFragment& aDocumentFragmentForPastedHTML,
DocumentFragment& aDocumentFragmentForContext,
nsIContent& aTargetContentOfContextForPastedHTML);
/**
* @param aInfoStr as indicated by nsITransferable's kHTMLInfo.
*/
[[nodiscard]] static nsresult MoveStartAndEndAccordingToHTMLInfo(
const nsAString& aInfoStr, nsCOMPtr<nsINode>* aOutStartNode,
nsCOMPtr<nsINode>* aOutEndNode);
static nsresult PostProcessFragmentForPastedHTMLWithoutContext(
DocumentFragment& aDocumentFragmentForPastedHTML);
static nsresult PreProcessContextDocumentFragmentForMerging(
DocumentFragment& aDocumentFragmentForContext);
static void RemoveHeadChildAndStealBodyChildsChildren(nsINode& aNode);
/**
* This is designed for a helper class to remove disturbing nodes at inserting
* the HTML fragment into the DOM tree. This walks the children and if some
* elements do not have enough children, e.g., list elements not having
* another visible list elements nor list item elements,
* will be removed.
*
* @param aNode Should not be a node whose mutation may be observed by
* JS.
*/
static void RemoveIncompleteDescendantsFromInsertingFragment(nsINode& aNode);
enum class NodesToRemove {
eAll,
eOnlyListItems /*!< List items are always block-level elements, hence such
whitespace-only nodes are always invisible. */
};
static nsresult
RemoveNonPreWhiteSpaceOnlyTextNodesForIgnoringInvisibleWhiteSpaces(
nsIContent& aNode, NodesToRemove aNodesToRemove);
};
HTMLBRElement*
HTMLEditor::HTMLWithContextInserter::GetInvisibleBRElementAtPoint(
const EditorDOMPoint& aPointToInsert) const {
WSRunScanner wsRunScannerAtInsertionPoint(mHTMLEditor.ComputeEditingHost(),
aPointToInsert);
if (wsRunScannerAtInsertionPoint.EndsByInvisibleBRElement()) {
return wsRunScannerAtInsertionPoint.EndReasonBRElementPtr();
}
return nullptr;
}
EditorDOMPoint
HTMLEditor::HTMLWithContextInserter::GetNewCaretPointAfterInsertingHTML(
const EditorDOMPoint& aLastInsertedPoint) const {
EditorDOMPoint pointToPutCaret;
// but don't cross tables
nsIContent* containerContent = nullptr;
if (!HTMLEditUtils::IsTable(aLastInsertedPoint.GetChild())) {
containerContent = HTMLEditUtils::GetLastLeafContent(
*aLastInsertedPoint.GetChild(), {LeafNodeType::OnlyEditableLeafNode},
aLastInsertedPoint.GetChild()->GetAsElementOrParentElement());
if (containerContent) {
Element* mostDistantInclusiveAncestorTableElement = nullptr;
for (Element* maybeTableElement =
containerContent->GetAsElementOrParentElement();
maybeTableElement &&
maybeTableElement != aLastInsertedPoint.GetChild();
maybeTableElement = maybeTableElement->GetParentElement()) {
if (HTMLEditUtils::IsTable(maybeTableElement)) {
mostDistantInclusiveAncestorTableElement = maybeTableElement;
}
}
// If we're in table elements, we should put caret into the most ancestor
// table element.
if (mostDistantInclusiveAncestorTableElement) {
containerContent = mostDistantInclusiveAncestorTableElement;
}
}
}
// If we are not in table elements, we should put caret in the last inserted
// node.
if (!containerContent) {
containerContent = aLastInsertedPoint.GetChild();
}
// If the container is a text node or a container element except `<table>`
// element, put caret a end of it.
if (containerContent->IsText() ||
(HTMLEditUtils::IsContainerNode(*containerContent) &&
!HTMLEditUtils::IsTable(containerContent))) {
pointToPutCaret.SetToEndOf(containerContent);
}
// Otherwise, i.e., it's an atomic element, `<table>` element or data node,
// put caret after it.
else {
pointToPutCaret.Set(containerContent);
DebugOnly<bool> advanced = pointToPutCaret.AdvanceOffset();
NS_WARNING_ASSERTION(advanced, "Failed to advance offset from found node");
}
// Make sure we don't end up with selection collapsed after an invisible
// `<br>` element.
Element* editingHost = mHTMLEditor.ComputeEditingHost();
WSRunScanner wsRunScannerAtCaret(editingHost, pointToPutCaret);
if (wsRunScannerAtCaret
.ScanPreviousVisibleNodeOrBlockBoundaryFrom(pointToPutCaret)
.ReachedInvisibleBRElement()) {
WSRunScanner wsRunScannerAtStartReason(
editingHost,
EditorDOMPoint(wsRunScannerAtCaret.GetStartReasonContent()));
WSScanResult backwardScanFromPointToCaretResult =
wsRunScannerAtStartReason.ScanPreviousVisibleNodeOrBlockBoundaryFrom(
pointToPutCaret);
if (backwardScanFromPointToCaretResult.InVisibleOrCollapsibleCharacters()) {
pointToPutCaret =
backwardScanFromPointToCaretResult.Point<EditorDOMPoint>();
} else if (backwardScanFromPointToCaretResult.ReachedSpecialContent()) {
// XXX In my understanding, this is odd. The end reason may not be
// same as the reached special content because the equality is
// guaranteed only when ReachedCurrentBlockBoundary() returns true.
// However, looks like that this code assumes that
// GetStartReasonContent() returns the content.
NS_ASSERTION(wsRunScannerAtStartReason.GetStartReasonContent() ==
backwardScanFromPointToCaretResult.GetContent(),
"Start reason is not the reached special content");
pointToPutCaret.SetAfter(
wsRunScannerAtStartReason.GetStartReasonContent());
}
}
return pointToPutCaret;
}
nsresult HTMLEditor::DoInsertHTMLWithContext(
const nsAString& aInputString, const nsAString& aContextStr,
const nsAString& aInfoStr, const nsAString& aFlavor,
const EditorDOMPoint& aPointToInsert, bool aDoDeleteSelection,
bool aTrustedInput, bool aClearStyle) {
HTMLWithContextInserter htmlWithContextInserter(*this);
return htmlWithContextInserter.Run(aInputString, aContextStr, aInfoStr,
aPointToInsert, aDoDeleteSelection,
aTrustedInput, aClearStyle);
}
nsresult HTMLEditor::HTMLWithContextInserter::Run(
const nsAString& aInputString, const nsAString& aContextStr,
const nsAString& aInfoStr, const EditorDOMPoint& aPointToInsert,
bool aDoDeleteSelection, bool aTrustedInput, bool aClearStyle) {
MOZ_ASSERT(mHTMLEditor.IsEditActionDataAvailable());
if (NS_WARN_IF(!mHTMLEditor.mInitSucceeded)) {
return NS_ERROR_NOT_INITIALIZED;
}
// force IME commit; set up rules sniffing and batching
mHTMLEditor.CommitComposition();
AutoPlaceholderBatch treatAsOneTransaction(
mHTMLEditor, ScrollSelectionIntoView::Yes, __FUNCTION__);
IgnoredErrorResult ignoredError;
AutoEditSubActionNotifier startToHandleEditSubAction(
mHTMLEditor, EditSubAction::ePasteHTMLContent, nsIEditor::eNext,
ignoredError);
if (NS_WARN_IF(ignoredError.ErrorCodeIs(NS_ERROR_EDITOR_DESTROYED))) {
return ignoredError.StealNSResult();
}
NS_WARNING_ASSERTION(
!ignoredError.Failed(),
"HTMLEditor::OnStartToHandleTopLevelEditSubAction() failed, but ignored");
ignoredError.SuppressException();
// create a dom document fragment that represents the structure to paste
nsCOMPtr<nsINode> fragmentAsNode, streamStartParent, streamEndParent;
uint32_t streamStartOffset = 0, streamEndOffset = 0;
nsresult rv = CreateDOMFragmentFromPaste(
aInputString, aContextStr, aInfoStr, address_of(fragmentAsNode),
address_of(streamStartParent), address_of(streamEndParent),
&streamStartOffset, &streamEndOffset, aTrustedInput);
if (NS_FAILED(rv)) {
NS_WARNING(
"HTMLEditor::HTMLWithContextInserter::CreateDOMFragmentFromPaste() "
"failed");
return rv;
}
// if we have a destination / target node, we want to insert there
// rather than in place of the selection
// ignore aDoDeleteSelection here if aPointToInsert is not set since deletion
// will also occur later; this block is intended to cover the various
// scenarios where we are dropping in an editor (and may want to delete
// the selection before collapsing the selection in the new destination)
if (aPointToInsert.IsSet()) {
rv = mHTMLEditor.PrepareToInsertContent(aPointToInsert, aDoDeleteSelection);
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::PrepareToInsertContent() failed");
return rv;
}
}
// we need to recalculate various things based on potentially new offsets
// this is work to be completed at a later date (probably by jfrancis)
AutoTArray<OwningNonNull<nsIContent>, 64> arrayOfTopMostChildContents;
// If we have stream start point information, lets use it and end point.
// Otherwise, we should make a range all over the document fragment.
EditorRawDOMPoint streamStartPoint =
streamStartParent
? EditorRawDOMPoint(streamStartParent,
AssertedCast<uint32_t>(streamStartOffset))
: EditorRawDOMPoint(fragmentAsNode, 0);
EditorRawDOMPoint streamEndPoint =
streamStartParent ? EditorRawDOMPoint(streamEndParent, streamEndOffset)
: EditorRawDOMPoint::AtEndOf(fragmentAsNode);
Unused << streamStartPoint;
Unused << streamEndPoint;
HTMLWithContextInserter::CollectTopMostChildContentsCompletelyInRange(
EditorRawDOMPoint(streamStartParent,
AssertedCast<uint32_t>(streamStartOffset)),
EditorRawDOMPoint(streamEndParent,
AssertedCast<uint32_t>(streamEndOffset)),
arrayOfTopMostChildContents);
if (arrayOfTopMostChildContents.IsEmpty()) {
// We aren't inserting anything, but if aDoDeleteSelection is set, we do
// want to delete everything.
// XXX What will this do? We've already called DeleteSelectionAsSubAtion()
// above if insertion point is specified.
if (aDoDeleteSelection) {
nsresult rv = mHTMLEditor.DeleteSelectionAsSubAction(eNone, eStrip);
if (NS_FAILED(rv)) {
NS_WARNING(
"EditorBase::DeleteSelectionAsSubAction(eNone, eStrip) failed");
return rv;
}
}
return NS_OK;
}
// Are there any table elements in the list?
// check for table cell selection mode
bool cellSelectionMode =
HTMLEditUtils::IsInTableCellSelectionMode(mHTMLEditor.SelectionRef());
if (cellSelectionMode) {
// do we have table content to paste? If so, we want to delete
// the selected table cells and replace with new table elements;
// but if not we want to delete _contents_ of cells and replace
// with non-table elements. Use cellSelectionMode bool to
// indicate results.
if (!HTMLEditUtils::IsAnyTableElement(arrayOfTopMostChildContents[0])) {
cellSelectionMode = false;
}
}
if (!cellSelectionMode) {
rv = mHTMLEditor.DeleteSelectionAndPrepareToCreateNode();
if (NS_FAILED(rv)) {
NS_WARNING("HTMLEditor::DeleteSelectionAndPrepareToCreateNode() failed");
return rv;
}
if (aClearStyle) {
// pasting does not inherit local inline styles
EditResult result = mHTMLEditor.ClearStyleAt(
EditorDOMPoint(mHTMLEditor.SelectionRef().AnchorRef()), nullptr,
nullptr, SpecifiedStyle::Preserve);
if (result.Failed()) {
NS_WARNING("HTMLEditor::ClearStyleAt() failed");
return result.Rv();
}
}
} else {
// Delete whole cells: we will replace with new table content.
// Braces for artificial block to scope AutoSelectionRestorer.
// Save current selection since DeleteTableCellWithTransaction() perturbs
// it.
{
AutoSelectionRestorer restoreSelectionLater(mHTMLEditor);
rv = mHTMLEditor.DeleteTableCellWithTransaction(1);
if (NS_FAILED(rv)) {
NS_WARNING("HTMLEditor::DeleteTableCellWithTransaction(1) failed");
return rv;
}
}
// collapse selection to beginning of deleted table content
IgnoredErrorResult ignoredError;
mHTMLEditor.SelectionRef().CollapseToStart(ignoredError);
NS_WARNING_ASSERTION(!ignoredError.Failed(),
"Selection::Collapse() failed, but ignored");
}
// XXX Why don't we test this first?
if (mHTMLEditor.IsReadonly()) {
return NS_OK;
}
EditActionResult result = mHTMLEditor.CanHandleHTMLEditSubAction();
if (result.Failed() || result.Canceled()) {
NS_WARNING_ASSERTION(result.Succeeded(),
"HTMLEditor::CanHandleHTMLEditSubAction() failed");
return result.Rv();
}
mHTMLEditor.UndefineCaretBidiLevel();
rv = mHTMLEditor.EnsureNoPaddingBRElementForEmptyEditor();
if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::EnsureNoPaddingBRElementForEmptyEditor() "
"failed, but ignored");
if (NS_SUCCEEDED(rv) && mHTMLEditor.SelectionRef().IsCollapsed()) {
nsresult rv = mHTMLEditor.EnsureCaretNotAfterInvisibleBRElement();
if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"HTMLEditor::EnsureCaretNotAfterInvisibleBRElement() "
"failed, but ignored");
if (NS_SUCCEEDED(rv)) {
nsresult rv = mHTMLEditor.PrepareInlineStylesForCaret();
if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"HTMLEditor::PrepareInlineStylesForCaret() failed, but ignored");
}
}
Element* editingHost =
mHTMLEditor.ComputeEditingHost(HTMLEditor::LimitInBodyElement::No);
if (NS_WARN_IF(!editingHost)) {
return NS_ERROR_FAILURE;
}
// Adjust position based on the first node we are going to insert.
EditorDOMPoint pointToInsert =
HTMLEditUtils::GetBetterInsertionPointFor<EditorDOMPoint>(
arrayOfTopMostChildContents[0],
mHTMLEditor.GetFirstSelectionStartPoint<EditorRawDOMPoint>(),
*editingHost);
if (!pointToInsert.IsSet()) {
NS_WARNING("HTMLEditor::GetBetterInsertionPointFor() failed");
return NS_ERROR_FAILURE;
}
// Remove invisible `<br>` element at the point because if there is a `<br>`
// element at end of what we paste, it will make the existing invisible
// `<br>` element visible.
if (HTMLBRElement* invisibleBRElement =
GetInvisibleBRElementAtPoint(pointToInsert)) {
AutoEditorDOMPointChildInvalidator lockOffset(pointToInsert);
nsresult rv = mHTMLEditor.DeleteNodeWithTransaction(
MOZ_KnownLive(*invisibleBRElement));
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::DeleteNodeWithTransaction() failed.");
return rv;
}
}
const bool insertionPointWasInLink =
!!HTMLEditor::GetLinkElement(pointToInsert.GetContainer());
if (pointToInsert.IsInTextNode()) {
const SplitNodeResult splitNodeResult =
mHTMLEditor.SplitNodeDeepWithTransaction(
MOZ_KnownLive(*pointToInsert.GetContainerAsContent()),
pointToInsert, SplitAtEdges::eAllowToCreateEmptyContainer);
if (splitNodeResult.isErr()) {
NS_WARNING("HTMLEditor::SplitNodeDeepWithTransaction() failed");
return splitNodeResult.unwrapErr();
}
nsresult rv = splitNodeResult.SuggestCaretPointTo(
mHTMLEditor, {SuggestCaret::OnlyIfHasSuggestion,
SuggestCaret::OnlyIfTransactionsAllowedToDoIt});
if (NS_FAILED(rv)) {
NS_WARNING("SplitNodeResult::SuggestCaretPointTo() failed");
return rv;
}
pointToInsert = splitNodeResult.AtSplitPoint<EditorDOMPoint>();
if (MOZ_UNLIKELY(!pointToInsert.IsSet())) {
NS_WARNING(
"HTMLEditor::SplitNodeDeepWithTransaction() didn't return split "
"point");
return NS_ERROR_FAILURE;
}
// When adding caret suggestion to SplitNodeResult, here didn't change
// selection so that just ignore it.
splitNodeResult.IgnoreCaretPointSuggestion();
}
{ // Block only for AutoHTMLFragmentBoundariesFixer to hide it from the
// following code. Note that it may modify arrayOfTopMostChildContents.
AutoHTMLFragmentBoundariesFixer fixPiecesOfTablesAndLists(
arrayOfTopMostChildContents);
}
MOZ_ASSERT(pointToInsert.GetContainer()->GetChildAt_Deprecated(
pointToInsert.Offset()) == pointToInsert.GetChild());
const Result<EditorDOMPoint, nsresult> lastInsertedPoint = InsertContents(
pointToInsert, arrayOfTopMostChildContents, fragmentAsNode);
if (lastInsertedPoint.isErr()) {
NS_WARNING("HTMLWithContextInserter::InsertContents() failed.");
return lastInsertedPoint.inspectErr();
}
mHTMLEditor.TopLevelEditSubActionDataRef().mNeedsToCleanUpEmptyElements =
false;
if (!lastInsertedPoint.inspect().IsSet()) {
return NS_OK;
}
const EditorDOMPoint pointToPutCaret =
GetNewCaretPointAfterInsertingHTML(lastInsertedPoint.inspect());
// Now collapse the selection to the end of what we just inserted.
rv = mHTMLEditor.CollapseSelectionTo(pointToPutCaret);
if (MOZ_UNLIKELY(rv == NS_ERROR_EDITOR_DESTROYED)) {
NS_WARNING(
"EditorBase::CollapseSelectionTo() caused destroying the editor");
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::CollapseSelectionTo() failed, but ignored");
// If we didn't start from an `<a href>` element, we should not keep
// caret in the link to make users type something outside the link.
if (insertionPointWasInLink) {
return NS_OK;
}
RefPtr<Element> linkElement = GetLinkElement(pointToPutCaret.GetContainer());
if (!linkElement) {
return NS_OK;
}
rv = MoveCaretOutsideOfLink(*linkElement, pointToPutCaret);
if (NS_FAILED(rv)) {
NS_WARNING(
"HTMLEditor::HTMLWithContextInserter::MoveCaretOutsideOfLink "
"failed.");
return rv;
}
return NS_OK;
}
Result<EditorDOMPoint, nsresult>
HTMLEditor::HTMLWithContextInserter::InsertContents(
const EditorDOMPoint& aPointToInsert,
nsTArray<OwningNonNull<nsIContent>>& aArrayOfTopMostChildContents,
const nsINode* aFragmentAsNode) {
EditorDOMPoint pointToInsert{aPointToInsert};
// Loop over the node list and paste the nodes:
const RefPtr<const Element> maybeNonEditableBlockElement =
pointToInsert.IsInContentNode()
? HTMLEditUtils::GetInclusiveAncestorElement(
*pointToInsert.ContainerAsContent(),
HTMLEditUtils::ClosestBlockElement)
: nullptr;
EditorDOMPoint lastInsertedPoint;
nsCOMPtr<nsIContent> insertedContextParentContent;
for (OwningNonNull<nsIContent>& content : aArrayOfTopMostChildContents) {
if (NS_WARN_IF(content == aFragmentAsNode) ||
NS_WARN_IF(content->IsHTMLElement(nsGkAtoms::body))) {
return Err(NS_ERROR_FAILURE);
}
if (insertedContextParentContent) {
// If we had to insert something higher up in the paste hierarchy,
// we want to skip any further paste nodes that descend from that.
// Else we will paste twice.
// XXX This check may be really expensive. Cannot we check whether
// the node's `ownerDocument` is the `aFragmentAsNode` or not?
// XXX If content was moved to outside of insertedContextParentContent
// by mutation event listeners, we will anyway duplicate it.
if (EditorUtils::IsDescendantOf(*content,
*insertedContextParentContent)) {
continue;
}
}
// If a `<table>` or `<tr>` element on the clipboard, and pasting it into
// a `<table>` or `<tr>` element, insert only the appropriate children
// instead.
bool inserted = false;
if (HTMLEditUtils::IsTableRow(content) &&
HTMLEditUtils::IsTableRow(pointToInsert.GetContainer()) &&
(HTMLEditUtils::IsTable(content) ||
HTMLEditUtils::IsTable(pointToInsert.GetContainer()))) {
// Move children of current node to the insertion point.
AutoTArray<OwningNonNull<nsIContent>, 24> children;
HTMLEditor::GetChildNodesOf(*content, children);
EditorDOMPoint pointToPutCaret;
for (const OwningNonNull<nsIContent>& child : children) {
// MOZ_KnownLive(child) because of bug 1622253
CreateContentResult moveChildResult =
mHTMLEditor.InsertNodeIntoProperAncestorWithTransaction<nsIContent>(
MOZ_KnownLive(child), pointToInsert,
SplitAtEdges::eDoNotCreateEmptyContainer);
inserted |=
moveChildResult.isOk() || moveChildResult.GotUnexpectedDOMTree();
if (moveChildResult.isErr()) {
// If moving node is moved to different place, we should ignore
// this result and keep trying to insert next content node to same
// position.
if (moveChildResult.GotUnexpectedDOMTree()) {
continue; // the inner `for` loop
}
NS_WARNING(
"HTMLEditor::InsertNodeIntoProperAncestorWithTransaction("
"SplitAtEdges::eDoNotCreateEmptyContainer) failed, maybe "
"ignored");
break; // from the inner `for` loop
}
lastInsertedPoint.Set(child);
pointToInsert = lastInsertedPoint.NextPoint();
MOZ_ASSERT(pointToInsert.IsSet());
moveChildResult.MoveCaretPointTo(
pointToPutCaret, mHTMLEditor,
{SuggestCaret::OnlyIfHasSuggestion,
SuggestCaret::OnlyIfTransactionsAllowedToDoIt});
} // end of the inner `for` loop
if (pointToPutCaret.IsSet()) {
nsresult rv = mHTMLEditor.CollapseSelectionTo(pointToPutCaret);
if (MOZ_UNLIKELY(rv == NS_ERROR_EDITOR_DESTROYED)) {
NS_WARNING(
"EditorBase::CollapseSelectionTo() caused destroying the editor");
return Err(NS_ERROR_EDITOR_DESTROYED);
}
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"EditorBase::CollapseSelectionTo() failed, but ignored");
}
}
// If a list element on the clipboard, and pasting it into a list or
// list item element, insert the appropriate children instead. I.e.,
// merge the list elements instead of pasting as a sublist.
else if (HTMLEditUtils::IsAnyListElement(content) &&
(HTMLEditUtils::IsAnyListElement(pointToInsert.GetContainer()) ||
HTMLEditUtils::IsListItem(pointToInsert.GetContainer()))) {
AutoTArray<OwningNonNull<nsIContent>, 24> children;
HTMLEditor::GetChildNodesOf(*content, children);
EditorDOMPoint pointToPutCaret;
for (const OwningNonNull<nsIContent>& child : children) {
if (HTMLEditUtils::IsListItem(child) ||
HTMLEditUtils::IsAnyListElement(child)) {
// If we're pasting into empty list item, we should remove it
// and past current node into the parent list directly.
// XXX This creates invalid structure if current list item element
// is not proper child of the parent element, or current node
// is a list element.
if (HTMLEditUtils::IsListItem(pointToInsert.GetContainer()) &&
HTMLEditUtils::IsEmptyNode(*pointToInsert.GetContainer())) {
NS_WARNING_ASSERTION(pointToInsert.GetContainerParent(),
"Insertion point is out of the DOM tree");
if (pointToInsert.GetContainerParent()) {
pointToInsert.Set(pointToInsert.GetContainer());
MOZ_ASSERT(pointToInsert.IsSet());
AutoEditorDOMPointChildInvalidator lockOffset(pointToInsert);
nsresult rv = mHTMLEditor.DeleteNodeWithTransaction(
MOZ_KnownLive(*pointToInsert.GetChild()));
if (MOZ_UNLIKELY(rv == NS_ERROR_EDITOR_DESTROYED)) {
NS_WARNING("EditorBase::DeleteNodeWithTransaction() failed");
return Err(NS_ERROR_EDITOR_DESTROYED);
}
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::DeleteNodeWithTransaction() "
"failed, but ignored");
}
}
// MOZ_KnownLive(child) because of bug 1622253
CreateContentResult moveChildResult =
mHTMLEditor
.InsertNodeIntoProperAncestorWithTransaction<nsIContent>(
MOZ_KnownLive(child), pointToInsert,
SplitAtEdges::eDoNotCreateEmptyContainer);
inserted |=
moveChildResult.isOk() || moveChildResult.GotUnexpectedDOMTree();
if (moveChildResult.isErr()) {
// If moving node is moved to different place, we should ignore
// this result and keep trying to insert next content node to
// same position.
if (moveChildResult.GotUnexpectedDOMTree()) {
continue; // the inner `for` loop
}
if (moveChildResult.EditorDestroyed()) {
NS_WARNING(
"HTMLEditor::InsertNodeIntoProperAncestorWithTransaction() "
"caused destroying the editor");
return Err(NS_ERROR_EDITOR_DESTROYED);
}
NS_WARNING(
"HTMLEditor::InsertNodeIntoProperAncestorWithTransaction("
"SplitAtEdges::eDoNotCreateEmptyContainer) failed, but maybe "
"ignored");
break; // from the inner `for` loop
}
lastInsertedPoint.Set(child);
pointToInsert = lastInsertedPoint.NextPoint();
MOZ_ASSERT(pointToInsert.IsSet());
moveChildResult.MoveCaretPointTo(
pointToPutCaret, mHTMLEditor,
{SuggestCaret::OnlyIfHasSuggestion,
SuggestCaret::OnlyIfTransactionsAllowedToDoIt});
}
// If the child of current node is not list item nor list element,
// we should remove it from the DOM tree.
else if (HTMLEditUtils::IsRemovableNode(child)) {
AutoEditorDOMPointChildInvalidator lockOffset(pointToInsert);
IgnoredErrorResult ignoredError;
content->RemoveChild(child, ignoredError);
if (MOZ_UNLIKELY(mHTMLEditor.Destroyed())) {
NS_WARNING(
"nsIContent::RemoveChild() caused destroying the editor");
return Err(NS_ERROR_EDITOR_DESTROYED);
}
NS_WARNING_ASSERTION(!ignoredError.Failed(),
"nsINode::RemoveChild() failed, but ignored");
} else {
NS_WARNING(
"Failed to delete the first child of a list element because the "
"list element non-editable");
break; // from the inner `for` loop
}
} // end of the inner `for` loop
if (MOZ_UNLIKELY(mHTMLEditor.Destroyed())) {
NS_WARNING("The editor has been destroyed");
return Err(NS_ERROR_EDITOR_DESTROYED);
}
if (pointToPutCaret.IsSet()) {
nsresult rv = mHTMLEditor.CollapseSelectionTo(pointToPutCaret);
if (MOZ_UNLIKELY(rv == NS_ERROR_EDITOR_DESTROYED)) {
NS_WARNING(
"EditorBase::CollapseSelectionTo() caused destroying the editor");
return Err(NS_ERROR_EDITOR_DESTROYED);
}
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"EditorBase::CollapseSelectionTo() failed, but ignored");
}
}
// If pasting into a `<pre>` element and current node is a `<pre>` element,
// move only its children.
else if (HTMLEditUtils::IsPre(maybeNonEditableBlockElement) &&
HTMLEditUtils::IsPre(content)) {
// Check for pre's going into pre's.
AutoTArray<OwningNonNull<nsIContent>, 24> children;
HTMLEditor::GetChildNodesOf(*content, children);
EditorDOMPoint pointToPutCaret;
for (const OwningNonNull<nsIContent>& child : children) {
// MOZ_KnownLive(child) because of bug 1622253
CreateContentResult moveChildResult =
mHTMLEditor.InsertNodeIntoProperAncestorWithTransaction<nsIContent>(
MOZ_KnownLive(child), pointToInsert,
SplitAtEdges::eDoNotCreateEmptyContainer);
inserted |=
moveChildResult.isOk() || moveChildResult.GotUnexpectedDOMTree();
if (moveChildResult.isErr()) {
// If moving node is moved to different place, we should ignore
// this result and keep trying to insert next content node there.
if (moveChildResult.GotUnexpectedDOMTree()) {
continue; // the inner `for` loop
}
if (moveChildResult.EditorDestroyed()) {
NS_WARNING(
"HTMLEditor::InsertNodeIntoProperAncestorWithTransaction() "
"caused destroying the editor");
return Err(NS_ERROR_EDITOR_DESTROYED);
}
NS_WARNING(
"HTMLEditor::InsertNodeIntoProperAncestorWithTransaction("
"SplitAtEdges::eDoNotCreateEmptyContainer) failed, but maybe "
"ignored");
break; // from the inner `for` loop
}
lastInsertedPoint.Set(child);
pointToInsert = lastInsertedPoint.NextPoint();
MOZ_ASSERT(pointToInsert.IsSet());
moveChildResult.MoveCaretPointTo(
pointToPutCaret, mHTMLEditor,
{SuggestCaret::OnlyIfHasSuggestion,
SuggestCaret::OnlyIfTransactionsAllowedToDoIt});
} // end of the inner `for` loop
if (pointToPutCaret.IsSet()) {
nsresult rv = mHTMLEditor.CollapseSelectionTo(pointToPutCaret);
if (MOZ_UNLIKELY(rv == NS_ERROR_EDITOR_DESTROYED)) {
NS_WARNING(
"EditorBase::CollapseSelectionTo() caused destroying the editor");
return Err(NS_ERROR_EDITOR_DESTROYED);
}
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"EditorBase::CollapseSelectionTo() failed, but ignored");
}
}
// TODO: For making the above code clearer, we should move this fallback
// path into a lambda and call it in each if/else-if block.
// If we haven't inserted current node nor its children, move current node
// to the insertion point.
if (!inserted) {
// MOZ_KnownLive(content) because 'aArrayOfTopMostChildContents' is
// guaranteed to keep it alive.
const CreateContentResult moveContentResult =
mHTMLEditor.InsertNodeIntoProperAncestorWithTransaction<nsIContent>(
MOZ_KnownLive(content), pointToInsert,
SplitAtEdges::eDoNotCreateEmptyContainer);
if (moveContentResult.isOk()) {
lastInsertedPoint.Set(content);
pointToInsert = lastInsertedPoint;
nsresult rv = moveContentResult.SuggestCaretPointTo(
mHTMLEditor, {SuggestCaret::OnlyIfHasSuggestion,
SuggestCaret::OnlyIfTransactionsAllowedToDoIt,
SuggestCaret::AndIgnoreTrivialError});
if (NS_FAILED(rv)) {
NS_WARNING("CreateContentResult::SuggestCaretPointTo() failed");
return Err(rv);
}
NS_WARNING_ASSERTION(
rv != NS_SUCCESS_EDITOR_BUT_IGNORED_TRIVIAL_ERROR,
"CreateContentResult::SuggestCaretPointTo() failed, but ignored");
} else if (moveContentResult.GotUnexpectedDOMTree()) {
// Moving node is moved to different place, we should keep trying to
// insert the next content to same position.
} else {
NS_WARNING(
"HTMLEditor::InsertNodeIntoProperAncestorWithTransaction("
"SplitAtEdges::eDoNotCreateEmptyContainer) failed, but ignored");
// Assume failure means no legal parent in the document hierarchy,
// try again with the parent of content in the paste hierarchy.
// FYI: We cannot use `InclusiveAncestorOfType` here because of
// calling `InsertNodeIntoProperAncestorWithTransaction()`.
for (nsCOMPtr<nsIContent> childContent = content; childContent;
childContent = childContent->GetParent()) {
if (NS_WARN_IF(!childContent->GetParent()) ||
NS_WARN_IF(
childContent->GetParent()->IsHTMLElement(nsGkAtoms::body))) {
break; // for the inner `for` loop
}
const OwningNonNull<nsIContent> oldParentContent =
*childContent->GetParent();
const CreateContentResult moveParentResult =
mHTMLEditor
.InsertNodeIntoProperAncestorWithTransaction<nsIContent>(
oldParentContent, pointToInsert,
SplitAtEdges::eDoNotCreateEmptyContainer);
if (moveParentResult.isErr()) {
// Moving node is moved to different place, we should keep trying to
// insert the next content to same position.
if (moveParentResult.GotUnexpectedDOMTree()) {
break; // from the inner `for` loop
}
if (moveParentResult.EditorDestroyed()) {
NS_WARNING(
"HTMLEditor::InsertNodeInToProperAncestorWithTransaction("
"SplitAtEdges::eDoNotCreateEmptyContainer) caused destroying "
"the editor");
return Err(NS_ERROR_EDITOR_DESTROYED);
}
NS_WARNING(
"HTMLEditor::InsertNodeInToProperAncestorWithTransaction("
"SplitAtEdges::eDoNotCreateEmptyContainer) failed, but "
"ignored");
continue; // the inner `for` loop
}
insertedContextParentContent = oldParentContent;
pointToInsert.Set(oldParentContent);
nsresult rv = moveParentResult.SuggestCaretPointTo(
mHTMLEditor, {SuggestCaret::OnlyIfHasSuggestion,
SuggestCaret::OnlyIfTransactionsAllowedToDoIt,
SuggestCaret::AndIgnoreTrivialError});
if (NS_FAILED(rv)) {
NS_WARNING("CreateContentResult::SuggestCaretPointTo() failed");
return Err(rv);
}
NS_WARNING_ASSERTION(
rv != NS_SUCCESS_EDITOR_BUT_IGNORED_TRIVIAL_ERROR,
"CreateContentResult::SuggestCaretPointTo() failed, but ignored");
break; // from the inner `for` loop
} // end of the inner `for` loop
}
}
if (lastInsertedPoint.IsSet()) {
if (MOZ_UNLIKELY(lastInsertedPoint.GetContainer() !=
lastInsertedPoint.GetChild()->GetParentNode())) {
NS_WARNING(
"HTMLEditor::DoInsertHTMLWithContext() got lost insertion point");
return Err(NS_ERROR_EDITOR_UNEXPECTED_DOM_TREE);
}
pointToInsert = lastInsertedPoint.NextPoint();
MOZ_ASSERT(pointToInsert.IsSet());
}
} // end of the `for` loop
return lastInsertedPoint;
}
nsresult HTMLEditor::HTMLWithContextInserter::MoveCaretOutsideOfLink(
Element& aLinkElement, const EditorDOMPoint& aPointToPutCaret) {
MOZ_ASSERT(HTMLEditUtils::IsLink(&aLinkElement));
// The reason why do that instead of just moving caret after it is, the
// link might have ended in an invisible `<br>` element. If so, the code
// above just placed selection inside that. So we need to split it instead.
// XXX Sounds like that it's not really expensive comparing with the reason
// to use SplitNodeDeepWithTransaction() here.
const SplitNodeResult splitLinkResult =
mHTMLEditor.SplitNodeDeepWithTransaction(
aLinkElement, aPointToPutCaret,
SplitAtEdges::eDoNotCreateEmptyContainer);
if (splitLinkResult.EditorDestroyed()) {
NS_WARNING(
"HTMLEditor::SplitNodeDeepWithTransaction() caused destroying the "
"editor");
return NS_ERROR_EDITOR_DESTROYED;
}
if (nsIContent* previousContentOfSplitPoint =
splitLinkResult.GetPreviousContent()) {
splitLinkResult.IgnoreCaretPointSuggestion();
nsresult rv = mHTMLEditor.CollapseSelectionTo(
EditorRawDOMPoint::After(*previousContentOfSplitPoint));
if (MOZ_UNLIKELY(rv == NS_ERROR_EDITOR_DESTROYED)) {
NS_WARNING(
"EditorBase::CollapseSelectionTo() caused destroying the editor");
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"EditorBase::CollapseSelectionTo() failed, but ignored");
return NS_OK;
}
nsresult rv = splitLinkResult.SuggestCaretPointTo(
mHTMLEditor, {SuggestCaret::OnlyIfHasSuggestion,
SuggestCaret::OnlyIfTransactionsAllowedToDoIt});
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"SplitNodeResult::SuggestCaretPointTo() failed");
return rv;
}
// static
Element* HTMLEditor::GetLinkElement(nsINode* aNode) {
if (NS_WARN_IF(!aNode)) {
return nullptr;
}
nsINode* node = aNode;
while (node) {
if (HTMLEditUtils::IsLink(node)) {
return node->AsElement();
}
node = node->GetParentNode();
}
return nullptr;
}
// static
nsresult HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator::
RemoveNonPreWhiteSpaceOnlyTextNodesForIgnoringInvisibleWhiteSpaces(
nsIContent& aNode, NodesToRemove aNodesToRemove) {
if (aNode.TextIsOnlyWhitespace()) {
nsCOMPtr<nsINode> parent = aNode.GetParentNode();
// TODO: presumably, if the parent is a `<pre>` element, the node
// shouldn't be removed.
if (parent) {
if (aNodesToRemove == NodesToRemove::eAll ||
HTMLEditUtils::IsAnyListElement(parent)) {
ErrorResult error;
parent->RemoveChild(aNode, error);
NS_WARNING_ASSERTION(!error.Failed(), "nsINode::RemoveChild() failed");
return error.StealNSResult();
}
return NS_OK;
}
}
if (!aNode.IsHTMLElement(nsGkAtoms::pre)) {
nsCOMPtr<nsIContent> child = aNode.GetLastChild();
while (child) {
nsCOMPtr<nsIContent> previous = child->GetPreviousSibling();
nsresult rv = FragmentFromPasteCreator::
RemoveNonPreWhiteSpaceOnlyTextNodesForIgnoringInvisibleWhiteSpaces(
*child, aNodesToRemove);
if (NS_FAILED(rv)) {
NS_WARNING(
"HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator::"
"RemoveNonPreWhiteSpaceOnlyTextNodesForIgnoringInvisibleWhiteSpaces"
"() "
"failed");
return rv;
}
child = std::move(previous);
}
}
return NS_OK;
}
class MOZ_STACK_CLASS HTMLEditor::HTMLTransferablePreparer {
public:
HTMLTransferablePreparer(const HTMLEditor& aHTMLEditor,
nsITransferable** aTransferable);
nsresult Run();
private:
void AddDataFlavorsInBestOrder(nsITransferable& aTransferable) const;
const HTMLEditor& mHTMLEditor;
nsITransferable** mTransferable;
};
HTMLEditor::HTMLTransferablePreparer::HTMLTransferablePreparer(
const HTMLEditor& aHTMLEditor, nsITransferable** aTransferable)
: mHTMLEditor{aHTMLEditor}, mTransferable{aTransferable} {
MOZ_ASSERT(mTransferable);
MOZ_ASSERT(!*mTransferable);
}
nsresult HTMLEditor::PrepareHTMLTransferable(
nsITransferable** aTransferable) const {
HTMLTransferablePreparer htmlTransferablePreparer{*this, aTransferable};
return htmlTransferablePreparer.Run();
}
nsresult HTMLEditor::HTMLTransferablePreparer::Run() {
// Create generic Transferable for getting the data
nsresult rv;
RefPtr<nsITransferable> transferable =
do_CreateInstance("@mozilla.org/widget/transferable;1", &rv);
if (NS_FAILED(rv)) {
NS_WARNING("do_CreateInstance() failed to create nsITransferable instance");
return rv;
}
if (!transferable) {
NS_WARNING("do_CreateInstance() returned nullptr, but ignored");
return NS_OK;
}
// Get the nsITransferable interface for getting the data from the clipboard
RefPtr<Document> destdoc = mHTMLEditor.GetDocument();
nsILoadContext* loadContext = destdoc ? destdoc->GetLoadContext() : nullptr;
DebugOnly<nsresult> rvIgnored = transferable->Init(loadContext);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"nsITransferable::Init() failed, but ignored");
// See `HTMLEditor::InsertFromTransferable`.
AddDataFlavorsInBestOrder(*transferable);
transferable.forget(mTransferable);
return NS_OK;
}
void HTMLEditor::HTMLTransferablePreparer::AddDataFlavorsInBestOrder(
nsITransferable& aTransferable) const {
// Create the desired DataFlavor for the type of data
// we want to get out of the transferable
// This should only happen in html editors, not plaintext
if (!mHTMLEditor.IsInPlaintextMode()) {
DebugOnly<nsresult> rvIgnored =
aTransferable.AddDataFlavor(kNativeHTMLMime);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"nsITransferable::AddDataFlavor(kNativeHTMLMime) failed, but ignored");
rvIgnored = aTransferable.AddDataFlavor(kHTMLMime);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"nsITransferable::AddDataFlavor(kHTMLMime) failed, but ignored");
rvIgnored = aTransferable.AddDataFlavor(kFileMime);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"nsITransferable::AddDataFlavor(kFileMime) failed, but ignored");
switch (Preferences::GetInt("clipboard.paste_image_type", 1)) {
case 0: // prefer JPEG over PNG over GIF encoding
rvIgnored = aTransferable.AddDataFlavor(kJPEGImageMime);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"nsITransferable::AddDataFlavor(kJPEGImageMime) "
"failed, but ignored");
rvIgnored = aTransferable.AddDataFlavor(kJPGImageMime);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"nsITransferable::AddDataFlavor(kJPGImageMime) "
"failed, but ignored");
rvIgnored = aTransferable.AddDataFlavor(kPNGImageMime);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"nsITransferable::AddDataFlavor(kPNGImageMime) "
"failed, but ignored");
rvIgnored = aTransferable.AddDataFlavor(kGIFImageMime);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"nsITransferable::AddDataFlavor(kGIFImageMime) "
"failed, but ignored");
break;
case 1: // prefer PNG over JPEG over GIF encoding (default)
default:
rvIgnored = aTransferable.AddDataFlavor(kPNGImageMime);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"nsITransferable::AddDataFlavor(kPNGImageMime) "
"failed, but ignored");
rvIgnored = aTransferable.AddDataFlavor(kJPEGImageMime);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"nsITransferable::AddDataFlavor(kJPEGImageMime) "
"failed, but ignored");
rvIgnored = aTransferable.AddDataFlavor(kJPGImageMime);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"nsITransferable::AddDataFlavor(kJPGImageMime) "
"failed, but ignored");
rvIgnored = aTransferable.AddDataFlavor(kGIFImageMime);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"nsITransferable::AddDataFlavor(kGIFImageMime) "
"failed, but ignored");
break;
case 2: // prefer GIF over JPEG over PNG encoding
rvIgnored = aTransferable.AddDataFlavor(kGIFImageMime);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"nsITransferable::AddDataFlavor(kGIFImageMime) "
"failed, but ignored");
rvIgnored = aTransferable.AddDataFlavor(kJPEGImageMime);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"nsITransferable::AddDataFlavor(kJPEGImageMime) "
"failed, but ignored");
rvIgnored = aTransferable.AddDataFlavor(kJPGImageMime);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"nsITransferable::AddDataFlavor(kJPGImageMime) "
"failed, but ignored");
rvIgnored = aTransferable.AddDataFlavor(kPNGImageMime);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"nsITransferable::AddDataFlavor(kPNGImageMime) "
"failed, but ignored");
break;
}
}
DebugOnly<nsresult> rvIgnored = aTransferable.AddDataFlavor(kUnicodeMime);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"nsITransferable::AddDataFlavor(kUnicodeMime) failed, but ignored");
rvIgnored = aTransferable.AddDataFlavor(kMozTextInternal);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"nsITransferable::AddDataFlavor(kMozTextInternal) failed, but ignored");
}
bool FindIntegerAfterString(const char* aLeadingString, const nsCString& aCStr,
int32_t& foundNumber) {
// first obtain offsets from cfhtml str
int32_t numFront = aCStr.Find(aLeadingString);
if (numFront == -1) {
return false;
}
numFront += strlen(aLeadingString);
int32_t numBack = aCStr.FindCharInSet(CRLF, numFront);
if (numBack == -1) {
return false;
}
nsAutoCString numStr(Substring(aCStr, numFront, numBack - numFront));
nsresult errorCode;
foundNumber = numStr.ToInteger(&errorCode);
return true;
}
void RemoveFragComments(nsCString& aStr) {
// remove the StartFragment/EndFragment comments from the str, if present
int32_t startCommentIndx = aStr.Find("<!--StartFragment");
if (startCommentIndx >= 0) {
int32_t startCommentEnd = aStr.Find("-->", false, startCommentIndx);
if (startCommentEnd > startCommentIndx) {
aStr.Cut(startCommentIndx, (startCommentEnd + 3) - startCommentIndx);
}
}
int32_t endCommentIndx = aStr.Find("<!--EndFragment");
if (endCommentIndx >= 0) {
int32_t endCommentEnd = aStr.Find("-->", false, endCommentIndx);
if (endCommentEnd > endCommentIndx) {
aStr.Cut(endCommentIndx, (endCommentEnd + 3) - endCommentIndx);
}
}
}
nsresult HTMLEditor::ParseCFHTML(const nsCString& aCfhtml,
char16_t** aStuffToPaste,
char16_t** aCfcontext) {
// First obtain offsets from cfhtml str.
int32_t startHTML, endHTML, startFragment, endFragment;
if (!FindIntegerAfterString("StartHTML:", aCfhtml, startHTML) ||
startHTML < -1) {
return NS_ERROR_FAILURE;
}
if (!FindIntegerAfterString("EndHTML:", aCfhtml, endHTML) || endHTML < -1) {
return NS_ERROR_FAILURE;
}
if (!FindIntegerAfterString("StartFragment:", aCfhtml, startFragment) ||
startFragment < 0) {
return NS_ERROR_FAILURE;
}
if (!FindIntegerAfterString("EndFragment:", aCfhtml, endFragment) ||
startFragment < 0) {
return NS_ERROR_FAILURE;
}
// The StartHTML and EndHTML markers are allowed to be -1 to include
// everything.
// See Reference: MSDN doc entitled "HTML Clipboard Format"
// http://msdn.microsoft.com/en-us/library/aa767917(VS.85).aspx#unknown_854
if (startHTML == -1) {
startHTML = aCfhtml.Find("<!--StartFragment-->");
if (startHTML == -1) {
return NS_OK;
}
}
if (endHTML == -1) {
const char endFragmentMarker[] = "<!--EndFragment-->";
endHTML = aCfhtml.Find(endFragmentMarker);
if (endHTML == -1) {
return NS_OK;
}
endHTML += ArrayLength(endFragmentMarker) - 1;
}
// create context string
nsAutoCString contextUTF8(
Substring(aCfhtml, startHTML, startFragment - startHTML) +
"<!--" kInsertCookie "-->"_ns +
Substring(aCfhtml, endFragment, endHTML - endFragment));
// validate startFragment
// make sure it's not in the middle of a HTML tag
// see bug #228879 for more details
int32_t curPos = startFragment;
while (curPos > startHTML) {
if (aCfhtml[curPos] == '>') {
// working backwards, the first thing we see is the end of a tag
// so StartFragment is good, so do nothing.
break;
}
if (aCfhtml[curPos] == '<') {
// if we are at the start, then we want to see the '<'
if (curPos != startFragment) {
// working backwards, the first thing we see is the start of a tag
// so StartFragment is bad, so we need to update it.
NS_ERROR(
"StartFragment byte count in the clipboard looks bad, see bug "
"#228879");
startFragment = curPos - 1;
}
break;
}
curPos--;
}
// create fragment string
nsAutoCString fragmentUTF8(
Substring(aCfhtml, startFragment, endFragment - startFragment));
// remove the StartFragment/EndFragment comments from the fragment, if present
RemoveFragComments(fragmentUTF8);
// remove the StartFragment/EndFragment comments from the context, if present
RemoveFragComments(contextUTF8);
// convert both strings to usc2
const nsString& fragUcs2Str = NS_ConvertUTF8toUTF16(fragmentUTF8);
const nsString& cntxtUcs2Str = NS_ConvertUTF8toUTF16(contextUTF8);
// translate platform linebreaks for fragment
int32_t oldLengthInChars =
fragUcs2Str.Length() + 1; // +1 to include null terminator
int32_t newLengthInChars = 0;
*aStuffToPaste = nsLinebreakConverter::ConvertUnicharLineBreaks(
fragUcs2Str.get(), nsLinebreakConverter::eLinebreakAny,
nsLinebreakConverter::eLinebreakContent, oldLengthInChars,
&newLengthInChars);
if (!*aStuffToPaste) {
NS_WARNING("nsLinebreakConverter::ConvertUnicharLineBreaks() failed");
return NS_ERROR_FAILURE;
}
// translate platform linebreaks for context
oldLengthInChars =
cntxtUcs2Str.Length() + 1; // +1 to include null terminator
newLengthInChars = 0;
*aCfcontext = nsLinebreakConverter::ConvertUnicharLineBreaks(
cntxtUcs2Str.get(), nsLinebreakConverter::eLinebreakAny,
nsLinebreakConverter::eLinebreakContent, oldLengthInChars,
&newLengthInChars);
// it's ok for context to be empty. frag might be whole doc and contain all
// its context.
// we're done!
return NS_OK;
}
static nsresult ImgFromData(const nsACString& aType, const nsACString& aData,
nsString& aOutput) {
aOutput.AssignLiteral("<IMG src=\"data:");
AppendUTF8toUTF16(aType, aOutput);
aOutput.AppendLiteral(";base64,");
nsresult rv = Base64EncodeAppend(aData, aOutput);
if (NS_FAILED(rv)) {
NS_WARNING("Base64Encode() failed");
return rv;
}
aOutput.AppendLiteral("\" alt=\"\" >");
return NS_OK;
}
NS_IMPL_CYCLE_COLLECTION_CLASS(HTMLEditor::BlobReader)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(HTMLEditor::BlobReader)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mBlob)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mHTMLEditor)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mPointToInsert)
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(HTMLEditor::BlobReader)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mBlob)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mHTMLEditor)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPointToInsert)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(HTMLEditor::BlobReader, AddRef)
NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(HTMLEditor::BlobReader, Release)
HTMLEditor::BlobReader::BlobReader(BlobImpl* aBlob, HTMLEditor* aHTMLEditor,
bool aIsSafe,
const EditorDOMPoint& aPointToInsert,
bool aDoDeleteSelection)
: mBlob(aBlob),
mHTMLEditor(aHTMLEditor),
// "beforeinput" event should've been dispatched before we read blob,
// but anyway, we need to clone dataTransfer for "input" event.
mDataTransfer(mHTMLEditor->GetInputEventDataTransfer()),
mPointToInsert(aPointToInsert),
mEditAction(aHTMLEditor->GetEditAction()),
mIsSafe(aIsSafe),
mDoDeleteSelection(aDoDeleteSelection),
mNeedsToDispatchBeforeInputEvent(
!mHTMLEditor->HasTriedToDispatchBeforeInputEvent()) {
MOZ_ASSERT(mBlob);
MOZ_ASSERT(mHTMLEditor);
MOZ_ASSERT(mHTMLEditor->IsEditActionDataAvailable());
MOZ_ASSERT(aPointToInsert.IsSet());
MOZ_ASSERT(mDataTransfer);
// Take only offset here since it's our traditional behavior.
AutoEditorDOMPointChildInvalidator storeOnlyWithOffset(mPointToInsert);
}
nsresult HTMLEditor::BlobReader::OnResult(const nsACString& aResult) {
AutoEditActionDataSetter editActionData(*mHTMLEditor, mEditAction);
editActionData.InitializeDataTransfer(mDataTransfer);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return EditorBase::ToGenericNSResult(NS_ERROR_FAILURE);
}
if (NS_WARN_IF(mNeedsToDispatchBeforeInputEvent)) {
nsresult rv = editActionData.MaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"MaybeDispatchBeforeInputEvent(), failed");
return EditorBase::ToGenericNSResult(rv);
}
} else {
editActionData.MarkAsBeforeInputHasBeenDispatched();
}
nsString blobType;
mBlob->GetType(blobType);
// TODO: This does not work well.
// * If the data is not an image file, this inserts <img> element with odd
// data URI (bug 1610220).
// * If the data is valid image file data, an <img> file is inserted with
// data URI, but it's not loaded (bug 1610219).
NS_ConvertUTF16toUTF8 type(blobType);
nsAutoString stuffToPaste;
nsresult rv = ImgFromData(type, aResult, stuffToPaste);
if (NS_FAILED(rv)) {
NS_WARNING("ImgFormData() failed");
return EditorBase::ToGenericNSResult(rv);
}
AutoPlaceholderBatch treatAsOneTransaction(
*mHTMLEditor, ScrollSelectionIntoView::Yes, __FUNCTION__);
EditorDOMPoint pointToInsert(mPointToInsert);
rv = MOZ_KnownLive(mHTMLEditor)
->DoInsertHTMLWithContext(stuffToPaste, u""_ns, u""_ns,
NS_LITERAL_STRING_FROM_CSTRING(kFileMime),
pointToInsert, mDoDeleteSelection, mIsSafe,
false);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"HTMLEditor::DoInsertHTMLWithContext() failed");
return EditorBase::ToGenericNSResult(rv);
}
nsresult HTMLEditor::BlobReader::OnError(const nsAString& aError) {
AutoTArray<nsString, 1> error;
error.AppendElement(aError);
nsContentUtils::ReportToConsole(nsIScriptError::warningFlag, "Editor"_ns,
mPointToInsert.GetContainer()->OwnerDoc(),
nsContentUtils::eDOM_PROPERTIES,
"EditorFileDropFailed", error);
return NS_OK;
}
class SlurpBlobEventListener final : public nsIDOMEventListener {
public:
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_CYCLE_COLLECTION_CLASS(SlurpBlobEventListener)
explicit SlurpBlobEventListener(HTMLEditor::BlobReader* aListener)
: mListener(aListener) {}
MOZ_CAN_RUN_SCRIPT NS_IMETHOD HandleEvent(Event* aEvent) override;
private:
~SlurpBlobEventListener() = default;
RefPtr<HTMLEditor::BlobReader> mListener;
};
NS_IMPL_CYCLE_COLLECTION(SlurpBlobEventListener, mListener)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(SlurpBlobEventListener)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_ENTRY(nsIDOMEventListener)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(SlurpBlobEventListener)
NS_IMPL_CYCLE_COLLECTING_RELEASE(SlurpBlobEventListener)
NS_IMETHODIMP SlurpBlobEventListener::HandleEvent(Event* aEvent) {
EventTarget* target = aEvent->GetTarget();
if (!target || !mListener) {
return NS_OK;
}
RefPtr<FileReader> reader = do_QueryObject(target);
if (!reader) {
return NS_OK;
}
EventMessage message = aEvent->WidgetEventPtr()->mMessage;
RefPtr<HTMLEditor::BlobReader> listener(mListener);
if (message == eLoad) {
MOZ_ASSERT(reader->DataFormat() == FileReader::FILE_AS_BINARY);
// The original data has been converted from Latin1 to UTF-16, this just
// undoes that conversion.
DebugOnly<nsresult> rvIgnored =
listener->OnResult(NS_LossyConvertUTF16toASCII(reader->Result()));
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"HTMLEditor::BlobReader::OnResult() failed, but ignored");
return NS_OK;
}
if (message == eLoadError) {
nsAutoString errorMessage;
reader->GetError()->GetErrorMessage(errorMessage);
DebugOnly<nsresult> rvIgnored = listener->OnError(errorMessage);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"HTMLEditor::BlobReader::OnError() failed, but ignored");
return NS_OK;
}
return NS_OK;
}
// static
nsresult HTMLEditor::SlurpBlob(Blob* aBlob, nsPIDOMWindowOuter* aWindow,
BlobReader* aBlobReader) {
MOZ_ASSERT(aBlob);
MOZ_ASSERT(aWindow);
MOZ_ASSERT(aBlobReader);
nsCOMPtr<nsPIDOMWindowInner> inner = aWindow->GetCurrentInnerWindow();
nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(inner);
RefPtr<WeakWorkerRef> workerRef;
RefPtr<FileReader> reader = new FileReader(global, workerRef);
RefPtr<SlurpBlobEventListener> eventListener =
new SlurpBlobEventListener(aBlobReader);
nsresult rv = reader->AddEventListener(u"load"_ns, eventListener, false);
if (NS_FAILED(rv)) {
NS_WARNING("FileReader::AddEventListener(load) failed");
return rv;
}
rv = reader->AddEventListener(u"error"_ns, eventListener, false);
if (NS_FAILED(rv)) {
NS_WARNING("FileReader::AddEventListener(error) failed");
return rv;
}
ErrorResult error;
reader->ReadAsBinaryString(*aBlob, error);
NS_WARNING_ASSERTION(!error.Failed(),
"FileReader::ReadAsBinaryString() failed");
return error.StealNSResult();
}
nsresult HTMLEditor::InsertObject(const nsACString& aType, nsISupports* aObject,
bool aIsSafe,
const EditorDOMPoint& aPointToInsert,
bool aDoDeleteSelection) {
MOZ_ASSERT(IsEditActionDataAvailable());
if (nsCOMPtr<BlobImpl> blob = do_QueryInterface(aObject)) {
RefPtr<BlobReader> br =
new BlobReader(blob, this, aIsSafe, aPointToInsert, aDoDeleteSelection);
// XXX This is not guaranteed.
MOZ_ASSERT(aPointToInsert.IsSet());
RefPtr<Blob> domBlob =
Blob::Create(aPointToInsert.GetContainer()->GetOwnerGlobal(), blob);
if (!domBlob) {
NS_WARNING("Blob::Create() failed");
return NS_ERROR_FAILURE;
}
nsresult rv = SlurpBlob(
domBlob, aPointToInsert.GetContainer()->OwnerDoc()->GetWindow(), br);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "HTMLEditor::::SlurpBlob() failed");
return rv;
}
nsAutoCString type(aType);
// Check to see if we can insert an image file
bool insertAsImage = false;
nsCOMPtr<nsIFile> fileObj;
if (type.EqualsLiteral(kFileMime)) {
fileObj = do_QueryInterface(aObject);
if (fileObj) {
// Accept any image type fed to us
if (nsContentUtils::IsFileImage(fileObj, type)) {
insertAsImage = true;
} else {
// Reset type.
type.AssignLiteral(kFileMime);
}
}
}
if (type.EqualsLiteral(kJPEGImageMime) || type.EqualsLiteral(kJPGImageMime) ||
type.EqualsLiteral(kPNGImageMime) || type.EqualsLiteral(kGIFImageMime) ||
insertAsImage) {
nsCString imageData;
if (insertAsImage) {
nsresult rv = nsContentUtils::SlurpFileToString(fileObj, imageData);
if (NS_FAILED(rv)) {
NS_WARNING("nsContentUtils::SlurpFileToString() failed");
return rv;
}
} else {
nsCOMPtr<nsIInputStream> imageStream;
if (RefPtr<Blob> blob = do_QueryObject(aObject)) {
RefPtr<File> file = blob->ToFile();
if (!file) {
NS_WARNING("No mozilla::dom::File object");
return NS_ERROR_FAILURE;
}
ErrorResult error;
file->CreateInputStream(getter_AddRefs(imageStream), error);
if (error.Failed()) {
NS_WARNING("File::CreateInputStream() failed");
return error.StealNSResult();
}
} else {
imageStream = do_QueryInterface(aObject);
if (NS_WARN_IF(!imageStream)) {
return NS_ERROR_FAILURE;
}
}
nsresult rv = NS_ConsumeStream(imageStream, UINT32_MAX, imageData);
if (NS_FAILED(rv)) {
NS_WARNING("NS_ConsumeStream() failed");
return rv;
}
rv = imageStream->Close();
if (NS_FAILED(rv)) {
NS_WARNING("nsIInputStream::Close() failed");
return rv;
}
}
nsAutoString stuffToPaste;
nsresult rv = ImgFromData(type, imageData, stuffToPaste);
if (NS_FAILED(rv)) {
NS_WARNING("ImgFromData() failed");
return rv;
}
AutoPlaceholderBatch treatAsOneTransaction(
*this, ScrollSelectionIntoView::Yes, __FUNCTION__);
rv = DoInsertHTMLWithContext(
stuffToPaste, u""_ns, u""_ns, NS_LITERAL_STRING_FROM_CSTRING(kFileMime),
aPointToInsert, aDoDeleteSelection, aIsSafe, false);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"HTMLEditor::DoInsertHTMLWithContext() failed, but ignored");
}
return NS_OK;
}
static bool GetString(nsISupports* aData, nsAString& aText) {
if (nsCOMPtr<nsISupportsString> str = do_QueryInterface(aData)) {
DebugOnly<nsresult> rvIgnored = str->GetData(aText);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"nsISupportsString::GetData() failed, but ignored");
return !aText.IsEmpty();
}
return false;
}
static bool GetCString(nsISupports* aData, nsACString& aText) {
if (nsCOMPtr<nsISupportsCString> str = do_QueryInterface(aData)) {
DebugOnly<nsresult> rvIgnored = str->GetData(aText);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"nsISupportsString::GetData() failed, but ignored");
return !aText.IsEmpty();
}
return false;
}
nsresult HTMLEditor::InsertFromTransferable(nsITransferable* aTransferable,
const nsAString& aContextStr,
const nsAString& aInfoStr,
bool aHavePrivateHTMLFlavor,
bool aDoDeleteSelection) {
nsAutoCString bestFlavor;
nsCOMPtr<nsISupports> genericDataObj;
// See `HTMLTransferablePreparer::AddDataFlavorsInBestOrder`.
nsresult rv = aTransferable->GetAnyTransferData(
bestFlavor, getter_AddRefs(genericDataObj));
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"nsITransferable::GetAnyTransferData() failed, but ignored");
if (NS_SUCCEEDED(rv)) {
AutoTransactionsConserveSelection dontChangeMySelection(*this);
nsAutoString flavor;
CopyASCIItoUTF16(bestFlavor, flavor);
bool isSafe = IsSafeToInsertData(nullptr);
if (bestFlavor.EqualsLiteral(kFileMime) ||
bestFlavor.EqualsLiteral(kJPEGImageMime) ||
bestFlavor.EqualsLiteral(kJPGImageMime) ||
bestFlavor.EqualsLiteral(kPNGImageMime) ||
bestFlavor.EqualsLiteral(kGIFImageMime)) {
nsresult rv = InsertObject(bestFlavor, genericDataObj, isSafe,
EditorDOMPoint(), aDoDeleteSelection);
if (NS_FAILED(rv)) {
NS_WARNING("HTMLEditor::InsertObject() failed");
return rv;
}
} else if (bestFlavor.EqualsLiteral(kNativeHTMLMime)) {
// note cf_html uses utf8
nsAutoCString cfhtml;
if (GetCString(genericDataObj, cfhtml)) {
// cfselection left emtpy for now.
nsString cfcontext, cffragment, cfselection;
nsresult rv = ParseCFHTML(cfhtml, getter_Copies(cffragment),
getter_Copies(cfcontext));
if (NS_SUCCEEDED(rv) && !cffragment.IsEmpty()) {
AutoPlaceholderBatch treatAsOneTransaction(
*this, ScrollSelectionIntoView::Yes, __FUNCTION__);
// If we have our private HTML flavor, we will only use the fragment
// from the CF_HTML. The rest comes from the clipboard.
if (aHavePrivateHTMLFlavor) {
rv = DoInsertHTMLWithContext(cffragment, aContextStr, aInfoStr,
flavor, EditorDOMPoint(),
aDoDeleteSelection, isSafe);
if (NS_FAILED(rv)) {
NS_WARNING("HTMLEditor::DoInsertHTMLWithContext() failed");
return rv;
}
} else {
rv = DoInsertHTMLWithContext(cffragment, cfcontext, cfselection,
flavor, EditorDOMPoint(),
aDoDeleteSelection, isSafe);
if (NS_FAILED(rv)) {
NS_WARNING("HTMLEditor::DoInsertHTMLWithContext() failed");
return rv;
}
}
} else {
// In some platforms (like Linux), the clipboard might return data
// requested for unknown flavors (for example:
// application/x-moz-nativehtml). In this case, treat the data
// to be pasted as mere HTML to get the best chance of pasting it
// correctly.
bestFlavor.AssignLiteral(kHTMLMime);
// Fall through the next case
}
}
}
if (bestFlavor.EqualsLiteral(kHTMLMime) ||
bestFlavor.EqualsLiteral(kUnicodeMime) ||
bestFlavor.EqualsLiteral(kMozTextInternal)) {
nsAutoString stuffToPaste;
if (!GetString(genericDataObj, stuffToPaste)) {
nsAutoCString text;
if (GetCString(genericDataObj, text)) {
CopyUTF8toUTF16(text, stuffToPaste);
}
}
if (!stuffToPaste.IsEmpty()) {
AutoPlaceholderBatch treatAsOneTransaction(
*this, ScrollSelectionIntoView::Yes, __FUNCTION__);
if (bestFlavor.EqualsLiteral(kHTMLMime)) {
nsresult rv = DoInsertHTMLWithContext(
stuffToPaste, aContextStr, aInfoStr, flavor, EditorDOMPoint(),
aDoDeleteSelection, isSafe);
if (NS_FAILED(rv)) {
NS_WARNING("HTMLEditor::DoInsertHTMLWithContext() failed");
return rv;
}
} else {
nsresult rv =
InsertTextAsSubAction(stuffToPaste, SelectionHandling::Delete);
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::InsertTextAsSubAction() failed");
return rv;
}
}
}
}
}
// Try to scroll the selection into view if the paste succeeded
DebugOnly<nsresult> rvIgnored = ScrollSelectionFocusIntoView();
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"EditorBase::ScrollSelectionFocusIntoView() failed, but ignored");
return NS_OK;
}
static void GetStringFromDataTransfer(const DataTransfer* aDataTransfer,
const nsAString& aType, uint32_t aIndex,
nsString& aOutputString) {
nsCOMPtr<nsIVariant> variant;
DebugOnly<nsresult> rvIgnored = aDataTransfer->GetDataAtNoSecurityCheck(
aType, aIndex, getter_AddRefs(variant));
if (!variant) {
MOZ_ASSERT(aOutputString.IsEmpty());
return;
}
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"DataTransfer::GetDataAtNoSecurityCheck() failed, but ignored");
variant->GetAsAString(aOutputString);
nsContentUtils::PlatformToDOMLineBreaks(aOutputString);
}
nsresult HTMLEditor::InsertFromDataTransfer(const DataTransfer* aDataTransfer,
uint32_t aIndex,
nsIPrincipal* aSourcePrincipal,
const EditorDOMPoint& aDroppedAt,
bool aDoDeleteSelection) {
MOZ_ASSERT(GetEditAction() == EditAction::eDrop ||
GetEditAction() == EditAction::ePaste);
MOZ_ASSERT(mPlaceholderBatch,
"HTMLEditor::InsertFromDataTransfer() should be called by "
"HandleDropEvent() or paste action and there should've already "
"been placeholder transaction");
MOZ_ASSERT_IF(GetEditAction() == EditAction::eDrop, aDroppedAt.IsSet());
ErrorResult error;
RefPtr<DOMStringList> types = aDataTransfer->MozTypesAt(aIndex, error);
if (error.Failed()) {
NS_WARNING("DataTransfer::MozTypesAt() failed");
return error.StealNSResult();
}
bool hasPrivateHTMLFlavor =
types->Contains(NS_LITERAL_STRING_FROM_CSTRING(kHTMLContext));
bool isPlaintextEditor = IsInPlaintextMode();
bool isSafe = IsSafeToInsertData(aSourcePrincipal);
uint32_t length = types->Length();
for (uint32_t i = 0; i < length; i++) {
nsAutoString type;
types->Item(i, type);
if (!isPlaintextEditor) {
if (type.EqualsLiteral(kFileMime) || type.EqualsLiteral(kJPEGImageMime) ||
type.EqualsLiteral(kJPGImageMime) ||
type.EqualsLiteral(kPNGImageMime) ||
type.EqualsLiteral(kGIFImageMime)) {
nsCOMPtr<nsIVariant> variant;
DebugOnly<nsresult> rvIgnored = aDataTransfer->GetDataAtNoSecurityCheck(
type, aIndex, getter_AddRefs(variant));
if (variant) {
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"DataTransfer::GetDataAtNoSecurityCheck() failed, but ignored");
nsCOMPtr<nsISupports> object;
rvIgnored = variant->GetAsISupports(getter_AddRefs(object));
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"nsIVariant::GetAsISupports() failed, but ignored");
nsresult rv = InsertObject(NS_ConvertUTF16toUTF8(type), object,
isSafe, aDroppedAt, aDoDeleteSelection);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"HTMLEditor::InsertObject() failed");
return rv;
}
} else if (type.EqualsLiteral(kNativeHTMLMime)) {
// Windows only clipboard parsing.
nsAutoString text;
GetStringFromDataTransfer(aDataTransfer, type, aIndex, text);
NS_ConvertUTF16toUTF8 cfhtml(text);
nsString cfcontext, cffragment,
cfselection; // cfselection left emtpy for now
nsresult rv = ParseCFHTML(cfhtml, getter_Copies(cffragment),
getter_Copies(cfcontext));
if (NS_SUCCEEDED(rv) && !cffragment.IsEmpty()) {
if (hasPrivateHTMLFlavor) {
// If we have our private HTML flavor, we will only use the fragment
// from the CF_HTML. The rest comes from the clipboard.
nsAutoString contextString, infoString;
GetStringFromDataTransfer(
aDataTransfer, NS_LITERAL_STRING_FROM_CSTRING(kHTMLContext),
aIndex, contextString);
GetStringFromDataTransfer(aDataTransfer,
NS_LITERAL_STRING_FROM_CSTRING(kHTMLInfo),
aIndex, infoString);
nsresult rv = DoInsertHTMLWithContext(cffragment, contextString,
infoString, type, aDroppedAt,
aDoDeleteSelection, isSafe);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"HTMLEditor::DoInsertHTMLWithContext() failed");
return rv;
}
nsresult rv =
DoInsertHTMLWithContext(cffragment, cfcontext, cfselection, type,
aDroppedAt, aDoDeleteSelection, isSafe);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"HTMLEditor::DoInsertHTMLWithContext() failed");
return rv;
}
} else if (type.EqualsLiteral(kHTMLMime)) {
nsAutoString text, contextString, infoString;
GetStringFromDataTransfer(aDataTransfer, type, aIndex, text);
GetStringFromDataTransfer(aDataTransfer,
NS_LITERAL_STRING_FROM_CSTRING(kHTMLContext),
aIndex, contextString);
GetStringFromDataTransfer(aDataTransfer,
NS_LITERAL_STRING_FROM_CSTRING(kHTMLInfo),
aIndex, infoString);
if (type.EqualsLiteral(kHTMLMime)) {
nsresult rv =
DoInsertHTMLWithContext(text, contextString, infoString, type,
aDroppedAt, aDoDeleteSelection, isSafe);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"HTMLEditor::DoInsertHTMLWithContext() failed");
return rv;
}
}
}
if (type.EqualsLiteral(kTextMime) || type.EqualsLiteral(kMozTextInternal)) {
nsAutoString text;
GetStringFromDataTransfer(aDataTransfer, type, aIndex, text);
nsresult rv = InsertTextAt(text, aDroppedAt, aDoDeleteSelection);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::InsertTextAt() failed");
return rv;
}
}
return NS_OK;
}
// static
bool HTMLEditor::HavePrivateHTMLFlavor(nsIClipboard* aClipboard) {
if (NS_WARN_IF(!aClipboard)) {
return false;
}
// check the clipboard for our special kHTMLContext flavor. If that is there,
// we know we have our own internal html format on clipboard.
bool bHavePrivateHTMLFlavor = false;
AutoTArray<nsCString, 1> flavArray = {nsDependentCString(kHTMLContext)};
nsresult rv = aClipboard->HasDataMatchingFlavors(
flavArray, nsIClipboard::kGlobalClipboard, &bHavePrivateHTMLFlavor);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"nsIClipboard::HasDataMatchingFlavors(nsIClipboard::"
"kGlobalClipboard) failed");
return NS_SUCCEEDED(rv) && bHavePrivateHTMLFlavor;
}
nsresult HTMLEditor::PasteAsAction(int32_t aClipboardType,
bool aDispatchPasteEvent,
nsIPrincipal* aPrincipal) {
AutoEditActionDataSetter editActionData(*this, EditAction::ePaste,
aPrincipal);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
if (aDispatchPasteEvent) {
if (!FireClipboardEvent(ePaste, aClipboardType)) {
return EditorBase::ToGenericNSResult(NS_ERROR_EDITOR_ACTION_CANCELED);
}
} else {
// The caller must already have dispatched a "paste" event.
editActionData.NotifyOfDispatchingClipboardEvent();
}
editActionData.InitializeDataTransferWithClipboard(
SettingDataTransfer::eWithFormat, aClipboardType);
nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"CanHandleAndMaybeDispatchBeforeInputEvent() failed");
return EditorBase::ToGenericNSResult(rv);
}
rv = PasteInternal(aClipboardType);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "HTMLEditor::PasteInternal() failed");
return EditorBase::ToGenericNSResult(rv);
}
nsresult HTMLEditor::PasteInternal(int32_t aClipboardType) {
MOZ_ASSERT(IsEditActionDataAvailable());
// Get Clipboard Service
nsresult rv = NS_OK;
nsCOMPtr<nsIClipboard> clipboard =
do_GetService("@mozilla.org/widget/clipboard;1", &rv);
if (NS_FAILED(rv)) {
NS_WARNING("Failed to get nsIClipboard service");
return rv;
}
// Get the nsITransferable interface for getting the data from the clipboard
nsCOMPtr<nsITransferable> transferable;
rv = PrepareHTMLTransferable(getter_AddRefs(transferable));
if (NS_FAILED(rv)) {
NS_WARNING("HTMLEditor::PrepareHTMLTransferable() failed");
return rv;
}
if (!transferable) {
NS_WARNING("HTMLEditor::PrepareHTMLTransferable() returned nullptr");
return NS_ERROR_FAILURE;
}
// Get the Data from the clipboard
rv = clipboard->GetData(transferable, aClipboardType);
if (NS_FAILED(rv)) {
NS_WARNING("nsIClipboard::GetData() failed");
return rv;
}
// XXX Why don't you check this first?
if (!IsModifiable()) {
return NS_OK;
}
// also get additional html copy hints, if present
nsAutoString contextStr, infoStr;
// If we have our internal html flavor on the clipboard, there is special
// context to use instead of cfhtml context.
bool hasPrivateHTMLFlavor = HavePrivateHTMLFlavor(clipboard);
if (hasPrivateHTMLFlavor) {
nsCOMPtr<nsITransferable> contextTransferable =
do_CreateInstance("@mozilla.org/widget/transferable;1");
if (!contextTransferable) {
NS_WARNING(
"do_CreateInstance() failed to create nsITransferable instance");
return NS_ERROR_FAILURE;
}
DebugOnly<nsresult> rvIgnored = contextTransferable->Init(nullptr);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"nsITransferable::Init() failed, but ignored");
contextTransferable->SetIsPrivateData(transferable->GetIsPrivateData());
rvIgnored = contextTransferable->AddDataFlavor(kHTMLContext);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"nsITransferable::AddDataFlavor(kHTMLContext) failed, but ignored");
rvIgnored = clipboard->GetData(contextTransferable, aClipboardType);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"nsIClipboard::GetData() failed, but ignored");
nsCOMPtr<nsISupports> contextDataObj;
rv = contextTransferable->GetTransferData(kHTMLContext,
getter_AddRefs(contextDataObj));
if (NS_SUCCEEDED(rv) && contextDataObj) {
if (nsCOMPtr<nsISupportsString> str = do_QueryInterface(contextDataObj)) {
DebugOnly<nsresult> rvIgnored = str->GetData(contextStr);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"nsISupportsString::GetData() failed, but ignored");
}
}
nsCOMPtr<nsITransferable> infoTransferable =
do_CreateInstance("@mozilla.org/widget/transferable;1");
if (!infoTransferable) {
NS_WARNING(
"do_CreateInstance() failed to create nsITransferable instance");
return NS_ERROR_FAILURE;
}
rvIgnored = infoTransferable->Init(nullptr);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"nsITransferable::Init() failed, but ignored");
contextTransferable->SetIsPrivateData(transferable->GetIsPrivateData());
rvIgnored = infoTransferable->AddDataFlavor(kHTMLInfo);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"nsITransferable::AddDataFlavor(kHTMLInfo) failed, but ignored");
clipboard->GetData(infoTransferable, aClipboardType);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"nsIClipboard::GetData() failed, but ignored");
nsCOMPtr<nsISupports> infoDataObj;
rv = infoTransferable->GetTransferData(kHTMLInfo,
getter_AddRefs(infoDataObj));
if (NS_SUCCEEDED(rv) && infoDataObj) {
if (nsCOMPtr<nsISupportsString> str = do_QueryInterface(infoDataObj)) {
DebugOnly<nsresult> rvIgnored = str->GetData(infoStr);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"nsISupportsString::GetData() failed, but ignored");
}
}
}
rv = InsertFromTransferable(transferable, contextStr, infoStr,
hasPrivateHTMLFlavor, true);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"HTMLEditor::InsertFromTransferable() failed");
return rv;
}
nsresult HTMLEditor::PasteTransferableAsAction(nsITransferable* aTransferable,
nsIPrincipal* aPrincipal) {
AutoEditActionDataSetter editActionData(*this, EditAction::ePaste,
aPrincipal);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
// InitializeDataTransfer may fetch input stream in aTransferable, so it
// may be invalid after calling this.
editActionData.InitializeDataTransfer(aTransferable);
// Use an invalid value for the clipboard type as data comes from
// aTransferable and we don't currently implement a way to put that in the
// data transfer yet.
if (!FireClipboardEvent(ePaste, nsIClipboard::kGlobalClipboard)) {
return EditorBase::ToGenericNSResult(NS_ERROR_EDITOR_ACTION_CANCELED);
}
// Dispatch "beforeinput" event after "paste" event.
nsresult rv = editActionData.MaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"MaybeDispatchBeforeInputEvent(), failed");
return EditorBase::ToGenericNSResult(rv);
}
RefPtr<DataTransfer> dataTransfer = GetInputEventDataTransfer();
if (dataTransfer->HasFile() && dataTransfer->MozItemCount() > 0) {
// Now aTransferable has moved to DataTransfer. Use DataTransfer.
AutoPlaceholderBatch treatAsOneTransaction(
*this, ScrollSelectionIntoView::Yes, __FUNCTION__);
rv = InsertFromDataTransfer(dataTransfer, 0, nullptr, EditorDOMPoint(),
true);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"HTMLEditor::InsertFromDataTransfer() failed");
} else {
nsAutoString contextStr, infoStr;
rv =
InsertFromTransferable(aTransferable, contextStr, infoStr, false, true);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"HTMLEditor::InsertFromTransferable() failed");
}
return EditorBase::ToGenericNSResult(rv);
}
nsresult HTMLEditor::PasteNoFormattingAsAction(int32_t aSelectionType,
nsIPrincipal* aPrincipal) {
AutoEditActionDataSetter editActionData(*this, EditAction::ePaste,
aPrincipal);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
editActionData.InitializeDataTransferWithClipboard(
SettingDataTransfer::eWithoutFormat, aSelectionType);
if (!FireClipboardEvent(ePasteNoFormatting, aSelectionType)) {
return EditorBase::ToGenericNSResult(NS_ERROR_EDITOR_ACTION_CANCELED);
}
// Dispatch "beforeinput" event after "paste" event. And perhaps, before
// committing composition because if pasting is canceled, we don't need to
// commit the active composition.
nsresult rv = editActionData.MaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"MaybeDispatchBeforeInputEvent(), failed");
return EditorBase::ToGenericNSResult(rv);
}
DebugOnly<nsresult> rvIgnored = CommitComposition();
if (NS_WARN_IF(Destroyed())) {
return EditorBase::ToGenericNSResult(NS_ERROR_EDITOR_DESTROYED);
}
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::CommitComposition() failed, but ignored");
// Get Clipboard Service
nsCOMPtr<nsIClipboard> clipboard(
do_GetService("@mozilla.org/widget/clipboard;1", &rv));
if (NS_FAILED(rv)) {
NS_WARNING("Failed to get nsIClipboard service");
return rv;
}
if (!GetDocument()) {
NS_WARNING("Editor didn't have document, but ignored");
return NS_OK;
}
Result<nsCOMPtr<nsITransferable>, nsresult> maybeTransferable =
EditorUtils::CreateTransferableForPlainText(*GetDocument());
if (maybeTransferable.isErr()) {
NS_WARNING("EditorUtils::CreateTransferableForPlainText() failed");
return EditorBase::ToGenericNSResult(maybeTransferable.unwrapErr());
}
nsCOMPtr<nsITransferable> transferable(maybeTransferable.unwrap());
if (!transferable) {
NS_WARNING(
"EditorUtils::CreateTransferableForPlainText() returned nullptr, but "
"ignored");
return NS_OK;
}
if (!IsModifiable()) {
return NS_OK;
}
// Get the Data from the clipboard
rv = clipboard->GetData(transferable, aSelectionType);
if (NS_FAILED(rv)) {
NS_WARNING("nsIClipboard::GetData() failed");
return rv;
}
rv = InsertFromTransferable(transferable, u""_ns, u""_ns, false, true);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"HTMLEditor::InsertFromTransferable() failed");
return EditorBase::ToGenericNSResult(rv);
}
// The following arrays contain the MIME types that we can paste. The arrays
// are used by CanPaste() and CanPasteTransferable() below.
static const char* textEditorFlavors[] = {kUnicodeMime};
static const char* textHtmlEditorFlavors[] = {kUnicodeMime, kHTMLMime,
kJPEGImageMime, kJPGImageMime,
kPNGImageMime, kGIFImageMime};
bool HTMLEditor::CanPaste(int32_t aClipboardType) const {
if (AreClipboardCommandsUnconditionallyEnabled()) {
return true;
}
// can't paste if readonly
if (!IsModifiable()) {
return false;
}
nsresult rv;
nsCOMPtr<nsIClipboard> clipboard(
do_GetService("@mozilla.org/widget/clipboard;1", &rv));
if (NS_FAILED(rv)) {
NS_WARNING("Failed to get nsIClipboard service");
return false;
}
// Use the flavors depending on the current editor mask
if (IsInPlaintextMode()) {
AutoTArray<nsCString, ArrayLength(textEditorFlavors)> flavors;
flavors.AppendElements<const char*>(Span<const char*>(textEditorFlavors));
bool haveFlavors;
nsresult rv = clipboard->HasDataMatchingFlavors(flavors, aClipboardType,
&haveFlavors);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"nsIClipboard::HasDataMatchingFlavors() failed");
return NS_SUCCEEDED(rv) && haveFlavors;
}
AutoTArray<nsCString, ArrayLength(textHtmlEditorFlavors)> flavors;
flavors.AppendElements<const char*>(Span<const char*>(textHtmlEditorFlavors));
bool haveFlavors;
rv = clipboard->HasDataMatchingFlavors(flavors, aClipboardType, &haveFlavors);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"nsIClipboard::HasDataMatchingFlavors() failed");
return NS_SUCCEEDED(rv) && haveFlavors;
}
bool HTMLEditor::CanPasteTransferable(nsITransferable* aTransferable) {
// can't paste if readonly
if (!IsModifiable()) {
return false;
}
// If |aTransferable| is null, assume that a paste will succeed.
if (!aTransferable) {
return true;
}
// Peek in |aTransferable| to see if it contains a supported MIME type.
// Use the flavors depending on the current editor mask
const char** flavors;
size_t length;
if (IsInPlaintextMode()) {
flavors = textEditorFlavors;
length = ArrayLength(textEditorFlavors);
} else {
flavors = textHtmlEditorFlavors;
length = ArrayLength(textHtmlEditorFlavors);
}
for (size_t i = 0; i < length; i++, flavors++) {
nsCOMPtr<nsISupports> data;
nsresult rv =
aTransferable->GetTransferData(*flavors, getter_AddRefs(data));
if (NS_SUCCEEDED(rv) && data) {
return true;
}
}
return false;
}
nsresult HTMLEditor::PasteAsQuotationAsAction(int32_t aClipboardType,
bool aDispatchPasteEvent,
nsIPrincipal* aPrincipal) {
MOZ_ASSERT(aClipboardType == nsIClipboard::kGlobalClipboard ||
aClipboardType == nsIClipboard::kSelectionClipboard);
if (IsReadonly()) {
return NS_OK;
}
AutoEditActionDataSetter editActionData(*this, EditAction::ePasteAsQuotation,
aPrincipal);
editActionData.InitializeDataTransferWithClipboard(
SettingDataTransfer::eWithFormat, aClipboardType);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
if (aDispatchPasteEvent) {
if (!FireClipboardEvent(ePaste, aClipboardType)) {
return EditorBase::ToGenericNSResult(NS_ERROR_EDITOR_ACTION_CANCELED);
}
} else {
// The caller must already have dispatched a "paste" event.
editActionData.NotifyOfDispatchingClipboardEvent();
}
nsresult rv = editActionData.MaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"MaybeDispatchBeforeInputEvent(), failed");
return EditorBase::ToGenericNSResult(rv);
}
if (IsInPlaintextMode()) {
nsresult rv = PasteAsPlaintextQuotation(aClipboardType);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"HTMLEditor::PasteAsPlaintextQuotation() failed");
return EditorBase::ToGenericNSResult(rv);
}
// If it's not in plain text edit mode, paste text into new
// <blockquote type="cite"> element after removing selection.
// XXX Why don't we test these first?
EditActionResult result = CanHandleHTMLEditSubAction();
if (result.Failed() || result.Canceled()) {
NS_WARNING_ASSERTION(result.Succeeded(),
"HTMLEditor::CanHandleHTMLEditSubAction() failed");
return EditorBase::ToGenericNSResult(result.Rv());
}
UndefineCaretBidiLevel();
AutoPlaceholderBatch treatAsOneTransaction(
*this, ScrollSelectionIntoView::Yes, __FUNCTION__);
IgnoredErrorResult ignoredError;
AutoEditSubActionNotifier startToHandleEditSubAction(
*this, EditSubAction::eInsertQuotation, nsIEditor::eNext, ignoredError);
if (NS_WARN_IF(ignoredError.ErrorCodeIs(NS_ERROR_EDITOR_DESTROYED))) {
return ignoredError.StealNSResult();
}
NS_WARNING_ASSERTION(
!ignoredError.Failed(),
"HTMLEditor::OnStartToHandleTopLevelEditSubAction() failed, but ignored");
rv = EnsureNoPaddingBRElementForEmptyEditor();
if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
return EditorBase::ToGenericNSResult(NS_ERROR_EDITOR_DESTROYED);
}
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::EnsureNoPaddingBRElementForEmptyEditor() "
"failed, but ignored");
if (NS_SUCCEEDED(rv) && SelectionRef().IsCollapsed()) {
nsresult rv = EnsureCaretNotAfterInvisibleBRElement();
if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
return EditorBase::ToGenericNSResult(NS_ERROR_EDITOR_DESTROYED);
}
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"HTMLEditor::EnsureCaretNotAfterInvisibleBRElement() "
"failed, but ignored");
if (NS_SUCCEEDED(rv)) {
nsresult rv = PrepareInlineStylesForCaret();
if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
return EditorBase::ToGenericNSResult(NS_ERROR_EDITOR_DESTROYED);
}
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"HTMLEditor::PrepareInlineStylesForCaret() failed, but ignored");
}
}
// Remove Selection and create `<blockquote type="cite">` now.
// XXX Why don't we insert the `<blockquote>` into the DOM tree after
// pasting the content in clipboard into it?
Result<RefPtr<Element>, nsresult> blockquoteElementOrError =
DeleteSelectionAndCreateElement(
*nsGkAtoms::blockquote,
// MOZ_CAN_RUN_SCRIPT_BOUNDARY due to bug 1758868
[](HTMLEditor&, Element& aBlockquoteElement, const EditorDOMPoint&)
MOZ_CAN_RUN_SCRIPT_BOUNDARY {
DebugOnly<nsresult> rvIgnored = aBlockquoteElement.SetAttr(
kNameSpaceID_None, nsGkAtoms::type, u"cite"_ns,
aBlockquoteElement.IsInComposedDoc());
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
nsPrintfCString(
"Element::SetAttr(nsGkAtoms::type, \"cite\", %s) "
"failed, but ignored",
aBlockquoteElement.IsInComposedDoc() ? "true" : "false")
.get());
return NS_OK;
});
if (MOZ_UNLIKELY(blockquoteElementOrError.isErr() ||
NS_WARN_IF(Destroyed()))) {
NS_WARNING(
"HTMLEditor::DeleteSelectionAndCreateElement(nsGkAtoms::blockquote) "
"failed");
return Destroyed() ? NS_ERROR_EDITOR_DESTROYED
: blockquoteElementOrError.unwrapErr();
}
MOZ_ASSERT(blockquoteElementOrError.inspect());
// Collapse Selection in the new `<blockquote>` element.
rv = CollapseSelectionToStartOf(
MOZ_KnownLive(*blockquoteElementOrError.inspect()));
if (MOZ_UNLIKELY(NS_FAILED(rv))) {
NS_WARNING("EditorBase::CollapseSelectionToStartOf() failed");
return rv;
}
rv = PasteInternal(aClipboardType);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "HTMLEditor::PasteInternal() failed");
return EditorBase::ToGenericNSResult(rv);
}
nsresult HTMLEditor::PasteAsPlaintextQuotation(int32_t aSelectionType) {
// Get Clipboard Service
nsresult rv;
nsCOMPtr<nsIClipboard> clipboard =
do_GetService("@mozilla.org/widget/clipboard;1", &rv);
if (NS_FAILED(rv)) {
NS_WARNING("Failed to get nsIClipboard service");
return rv;
}
// Create generic Transferable for getting the data
nsCOMPtr<nsITransferable> transferable =
do_CreateInstance("@mozilla.org/widget/transferable;1", &rv);
if (NS_FAILED(rv)) {
NS_WARNING("do_CreateInstance() failed to create nsITransferable instance");
return rv;
}
if (!transferable) {
NS_WARNING("do_CreateInstance() returned nullptr");
return NS_ERROR_FAILURE;
}
RefPtr<Document> destdoc = GetDocument();
nsILoadContext* loadContext = destdoc ? destdoc->GetLoadContext() : nullptr;
DebugOnly<nsresult> rvIgnored = transferable->Init(loadContext);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"nsITransferable::Init() failed, but ignored");
// We only handle plaintext pastes here
rvIgnored = transferable->AddDataFlavor(kUnicodeMime);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"nsITransferable::AddDataFlavor(kUnicodeMime) failed, but ignored");
// Get the Data from the clipboard
rvIgnored = clipboard->GetData(transferable, aSelectionType);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"nsIClipboard::GetData() failed, but ignored");
// Now we ask the transferable for the data
// it still owns the data, we just have a pointer to it.
// If it can't support a "text" output of the data the call will fail
nsCOMPtr<nsISupports> genericDataObj;
nsAutoCString flavor;
rv = transferable->GetAnyTransferData(flavor, getter_AddRefs(genericDataObj));
if (NS_FAILED(rv)) {
NS_WARNING("nsITransferable::GetAnyTransferData() failed");
return rv;
}
if (!flavor.EqualsLiteral(kUnicodeMime)) {
return NS_OK;
}
nsAutoString stuffToPaste;
if (!GetString(genericDataObj, stuffToPaste)) {
return NS_OK;
}
AutoPlaceholderBatch treatAsOneTransaction(
*this, ScrollSelectionIntoView::Yes, __FUNCTION__);
rv = InsertAsPlaintextQuotation(stuffToPaste, true, 0);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"HTMLEditor::InsertAsPlaintextQuotation() failed");
return rv;
}
nsresult HTMLEditor::InsertWithQuotationsAsSubAction(
const nsAString& aQuotedText) {
MOZ_ASSERT(IsEditActionDataAvailable());
if (IsReadonly()) {
return NS_OK;
}
EditActionResult result = CanHandleHTMLEditSubAction();
if (result.Failed() || result.Canceled()) {
NS_WARNING_ASSERTION(result.Succeeded(),
"HTMLEditor::CanHandleHTMLEditSubAction() failed");
return result.Rv();
}
UndefineCaretBidiLevel();
// Let the citer quote it for us:
nsString quotedStuff;
InternetCiter::GetCiteString(aQuotedText, quotedStuff);
// It's best to put a blank line after the quoted text so that mails
// written without thinking won't be so ugly.
if (!aQuotedText.IsEmpty() &&
(aQuotedText.Last() != HTMLEditUtils::kNewLine)) {
quotedStuff.Append(HTMLEditUtils::kNewLine);
}
IgnoredErrorResult ignoredError;
AutoEditSubActionNotifier startToHandleEditSubAction(
*this, EditSubAction::eInsertText, nsIEditor::eNext, ignoredError);
if (NS_WARN_IF(ignoredError.ErrorCodeIs(NS_ERROR_EDITOR_DESTROYED))) {
return ignoredError.StealNSResult();
}
NS_WARNING_ASSERTION(
!ignoredError.Failed(),
"OnStartToHandleTopLevelEditSubAction() failed, but ignored");
nsresult rv = EnsureNoPaddingBRElementForEmptyEditor();
if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::EnsureNoPaddingBRElementForEmptyEditor() "
"failed, but ignored");
if (NS_SUCCEEDED(rv) && SelectionRef().IsCollapsed()) {
nsresult rv = EnsureCaretNotAfterInvisibleBRElement();
if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"HTMLEditor::EnsureCaretNotAfterInvisibleBRElement() "
"failed, but ignored");
if (NS_SUCCEEDED(rv)) {
nsresult rv = PrepareInlineStylesForCaret();
if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"HTMLEditor::PrepareInlineStylesForCaret() failed, but ignored");
}
}
rv = InsertTextAsSubAction(quotedStuff, SelectionHandling::Delete);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::InsertTextAsSubAction() failed");
return rv;
}
NS_IMETHODIMP HTMLEditor::InsertTextWithQuotations(
const nsAString& aStringToInsert) {
AutoEditActionDataSetter editActionData(*this, EditAction::eInsertText);
MOZ_ASSERT(!aStringToInsert.IsVoid());
editActionData.SetData(aStringToInsert);
nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"CanHandleAndMaybeDispatchBeforeInputEvent(), failed");
return EditorBase::ToGenericNSResult(rv);
}
if (aStringToInsert.IsEmpty()) {
return NS_OK;
}
// The whole operation should be undoable in one transaction:
// XXX Why isn't enough to use only AutoPlaceholderBatch here?
AutoTransactionBatch bundleAllTransactions(*this, __FUNCTION__);
AutoPlaceholderBatch treatAsOneTransaction(
*this, ScrollSelectionIntoView::Yes, __FUNCTION__);
rv = InsertTextWithQuotationsInternal(aStringToInsert);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"HTMLEditor::InsertTextWithQuotationsInternal() failed");
return EditorBase::ToGenericNSResult(rv);
}
nsresult HTMLEditor::InsertTextWithQuotationsInternal(
const nsAString& aStringToInsert) {
MOZ_ASSERT(!aStringToInsert.IsEmpty());
// We're going to loop over the string, collecting up a "hunk"
// that's all the same type (quoted or not),
// Whenever the quotedness changes (or we reach the string's end)
// we will insert the hunk all at once, quoted or non.
static const char16_t cite('>');
bool curHunkIsQuoted = (aStringToInsert.First() == cite);
nsAString::const_iterator hunkStart, strEnd;
aStringToInsert.BeginReading(hunkStart);
aStringToInsert.EndReading(strEnd);
// In the loop below, we only look for DOM newlines (\n),
// because we don't have a FindChars method that can look
// for both \r and \n. \r is illegal in the dom anyway,
// but in debug builds, let's take the time to verify that
// there aren't any there:
#ifdef DEBUG
nsAString::const_iterator dbgStart(hunkStart);
if (FindCharInReadable(HTMLEditUtils::kCarriageReturn, dbgStart, strEnd)) {
NS_ASSERTION(
false,
"Return characters in DOM! InsertTextWithQuotations may be wrong");
}
#endif /* DEBUG */
// Loop over lines:
nsresult rv = NS_OK;
nsAString::const_iterator lineStart(hunkStart);
// We will break from inside when we run out of newlines.
for (;;) {
// Search for the end of this line (dom newlines, see above):
bool found = FindCharInReadable(HTMLEditUtils::kNewLine, lineStart, strEnd);
bool quoted = false;
if (found) {
// if there's another newline, lineStart now points there.
// Loop over any consecutive newline chars:
nsAString::const_iterator firstNewline(lineStart);
while (*lineStart == HTMLEditUtils::kNewLine) {
++lineStart;
}
quoted = (*lineStart == cite);
if (quoted == curHunkIsQuoted) {
continue;
}
// else we're changing state, so we need to insert
// from curHunk to lineStart then loop around.
// But if the current hunk is quoted, then we want to make sure
// that any extra newlines on the end do not get included in
// the quoted section: blank lines flaking a quoted section
// should be considered unquoted, so that if the user clicks
// there and starts typing, the new text will be outside of
// the quoted block.
if (curHunkIsQuoted) {
lineStart = firstNewline;
// 'firstNewline' points to the first '\n'. We want to
// ensure that this first newline goes into the hunk
// since quoted hunks can be displayed as blocks
// (and the newline should become invisible in this case).
// So the next line needs to start at the next character.
lineStart++;
}
}
// If no newline found, lineStart is now strEnd and we can finish up,
// inserting from curHunk to lineStart then returning.
const nsAString& curHunk = Substring(hunkStart, lineStart);
nsCOMPtr<nsINode> dummyNode;
if (curHunkIsQuoted) {
rv =
InsertAsPlaintextQuotation(curHunk, false, getter_AddRefs(dummyNode));
if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"HTMLEditor::InsertAsPlaintextQuotation() failed, "
"but might be ignored");
} else {
rv = InsertTextAsSubAction(curHunk, SelectionHandling::Delete);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"EditorBase::InsertTextAsSubAction() failed, but might be ignored");
}
if (!found) {
break;
}
curHunkIsQuoted = quoted;
hunkStart = lineStart;
}
// XXX This returns the last result of InsertAsPlaintextQuotation() or
// InsertTextAsSubAction() in the loop. This must be a bug.
return rv;
}
nsresult HTMLEditor::InsertAsQuotation(const nsAString& aQuotedText,
nsINode** aNodeInserted) {
if (IsInPlaintextMode()) {
AutoEditActionDataSetter editActionData(*this, EditAction::eInsertText);
MOZ_ASSERT(!aQuotedText.IsVoid());
editActionData.SetData(aQuotedText);
nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(
rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"CanHandleAndMaybeDispatchBeforeInputEvent(), failed");
return EditorBase::ToGenericNSResult(rv);
}
AutoPlaceholderBatch treatAsOneTransaction(
*this, ScrollSelectionIntoView::Yes, __FUNCTION__);
rv = InsertAsPlaintextQuotation(aQuotedText, true, aNodeInserted);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"HTMLEditor::InsertAsPlaintextQuotation() failed");
return EditorBase::ToGenericNSResult(rv);
}
AutoEditActionDataSetter editActionData(*this,
EditAction::eInsertBlockquoteElement);
nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"CanHandleAndMaybeDispatchBeforeInputEvent(), failed");
return EditorBase::ToGenericNSResult(rv);
}
AutoPlaceholderBatch treatAsOneTransaction(
*this, ScrollSelectionIntoView::Yes, __FUNCTION__);
nsAutoString citation;
rv = InsertAsCitedQuotationInternal(aQuotedText, citation, false,
aNodeInserted);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"HTMLEditor::InsertAsCitedQuotationInternal() failed");
return EditorBase::ToGenericNSResult(rv);
}
// Insert plaintext as a quotation, with cite marks (e.g. "> ").
// This differs from its corresponding method in TextEditor
// in that here, quoted material is enclosed in a <pre> tag
// in order to preserve the original line wrapping.
nsresult HTMLEditor::InsertAsPlaintextQuotation(const nsAString& aQuotedText,
bool aAddCites,
nsINode** aNodeInserted) {
MOZ_ASSERT(IsEditActionDataAvailable());
if (aNodeInserted) {
*aNodeInserted = nullptr;
}
if (IsReadonly()) {
return NS_OK;
}
EditActionResult result = CanHandleHTMLEditSubAction();
if (result.Failed() || result.Canceled()) {
NS_WARNING_ASSERTION(result.Succeeded(),
"HTMLEditor::CanHandleHTMLEditSubAction() failed");
return result.Rv();
}
UndefineCaretBidiLevel();
IgnoredErrorResult ignoredError;
AutoEditSubActionNotifier startToHandleEditSubAction(
*this, EditSubAction::eInsertQuotation, nsIEditor::eNext, ignoredError);
if (NS_WARN_IF(ignoredError.ErrorCodeIs(NS_ERROR_EDITOR_DESTROYED))) {
return ignoredError.StealNSResult();
}
NS_WARNING_ASSERTION(
!ignoredError.Failed(),
"HTMLEditor::OnStartToHandleTopLevelEditSubAction() failed, but ignored");
nsresult rv = EnsureNoPaddingBRElementForEmptyEditor();
if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::EnsureNoPaddingBRElementForEmptyEditor() "
"failed, but ignored");
if (NS_SUCCEEDED(rv) && SelectionRef().IsCollapsed()) {
nsresult rv = EnsureCaretNotAfterInvisibleBRElement();
if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"HTMLEditor::EnsureCaretNotAfterInvisibleBRElement() "
"failed, but ignored");
if (NS_SUCCEEDED(rv)) {
nsresult rv = PrepareInlineStylesForCaret();
if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"HTMLEditor::PrepareInlineStylesForCaret() failed, but ignored");
}
}
// Wrap the inserted quote in a <span> so we can distinguish it. If we're
// inserting into the <body>, we use a <span> which is displayed as a block
// and sized to the screen using 98 viewport width units.
// We could use 100vw, but 98vw avoids a horizontal scroll bar where possible.
// All this is done to wrap overlong lines to the screen and not to the
// container element, the width-restricted body.
Result<RefPtr<Element>, nsresult> spanElementOrError =
DeleteSelectionAndCreateElement(
*nsGkAtoms::span, [](HTMLEditor&, Element& aSpanElement,
const EditorDOMPoint& aPointToInsert) {
// Add an attribute on the pre node so we'll know it's a quotation.
DebugOnly<nsresult> rvIgnored = aSpanElement.SetAttr(
kNameSpaceID_None, nsGkAtoms::mozquote, u"true"_ns,
aSpanElement.IsInComposedDoc());
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
nsPrintfCString(
"Element::SetAttr(nsGkAtoms::mozquote, \"true\", %s) "
"failed",
aSpanElement.IsInComposedDoc() ? "true" : "false")
.get());
// Allow wrapping on spans so long lines get wrapped to the screen.
if (aPointToInsert.IsContainerHTMLElement(nsGkAtoms::body)) {
DebugOnly<nsresult> rvIgnored = aSpanElement.SetAttr(
kNameSpaceID_None, nsGkAtoms::style,
nsLiteralString(u"white-space: pre-wrap; display: block; "
u"width: 98vw;"),
false);
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
"Element::SetAttr(nsGkAtoms::style, \"pre-wrap, block\", "
"false) failed, but ignored");
} else {
DebugOnly<nsresult> rvIgnored =
aSpanElement.SetAttr(kNameSpaceID_None, nsGkAtoms::style,
u"white-space: pre-wrap;"_ns, false);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"Element::SetAttr(nsGkAtoms::style, "
"\"pre-wrap\", false) failed, but ignored");
}
return NS_OK;
});
NS_WARNING_ASSERTION(spanElementOrError.isOk(),
"HTMLEditor::DeleteSelectionAndCreateElement(nsGkAtoms::"
"span) failed, but ignored");
// If this succeeded, then set selection inside the pre
// so the inserted text will end up there.
// If it failed, we don't care what the return value was,
// but we'll fall through and try to insert the text anyway.
if (spanElementOrError.isOk()) {
MOZ_ASSERT(spanElementOrError.inspect());
rv = CollapseSelectionToStartOf(
MOZ_KnownLive(*spanElementOrError.inspect()));
if (MOZ_UNLIKELY(rv == NS_ERROR_EDITOR_DESTROYED)) {
NS_WARNING(
"EditorBase::CollapseSelectionToStartOf() caused destroying the "
"editor");
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"EditorBase::CollapseSelectionToStartOf() failed, but ignored");
}
// TODO: We should insert text at specific point rather than at selection.
// Then, we can do this before inserting the <span> element.
if (aAddCites) {
rv = InsertWithQuotationsAsSubAction(aQuotedText);
if (NS_FAILED(rv)) {
NS_WARNING("HTMLEditor::InsertWithQuotationsAsSubAction() failed");
return rv;
}
} else {
rv = InsertTextAsSubAction(aQuotedText, SelectionHandling::Delete);
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::InsertTextAsSubAction() failed");
return rv;
}
}
// XXX Why don't we check this before inserting the quoted text?
if (spanElementOrError.isErr()) {
return NS_OK;
}
// Set the selection to just after the inserted node:
EditorRawDOMPoint afterNewSpanElement(
EditorRawDOMPoint::After(*spanElementOrError.inspect()));
NS_WARNING_ASSERTION(
afterNewSpanElement.IsSet(),
"Failed to set after the new <span> element, but ignored");
if (afterNewSpanElement.IsSet()) {
nsresult rv = CollapseSelectionTo(afterNewSpanElement);
if (MOZ_UNLIKELY(rv == NS_ERROR_EDITOR_DESTROYED)) {
NS_WARNING(
"EditorBase::CollapseSelectionTo() caused destroying the editor");
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"EditorBase::CollapseSelectionTo() failed, but ignored");
}
// Note that if !aAddCites, aNodeInserted isn't set.
// That's okay because the routines that use aAddCites
// don't need to know the inserted node.
if (aNodeInserted) {
spanElementOrError.unwrap().forget(aNodeInserted);
}
return NS_OK;
}
NS_IMETHODIMP HTMLEditor::Rewrap(bool aRespectNewlines) {
AutoEditActionDataSetter editActionData(*this, EditAction::eRewrap);
nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"CanHandleAndMaybeDispatchBeforeInputEvent(), failed");
return EditorBase::ToGenericNSResult(rv);
}
// Rewrap makes no sense if there's no wrap column; default to 72.
int32_t wrapWidth = WrapWidth();
if (wrapWidth <= 0) {
wrapWidth = 72;
}
nsAutoString current;
const bool isCollapsed = SelectionRef().IsCollapsed();
uint32_t flags = nsIDocumentEncoder::OutputFormatted |
nsIDocumentEncoder::OutputLFLineBreak;
if (!isCollapsed) {
flags |= nsIDocumentEncoder::OutputSelectionOnly;
}
rv = ComputeValueInternal(u"text/plain"_ns, flags, current);
if (NS_FAILED(rv)) {
NS_WARNING("EditorBase::ComputeValueInternal(text/plain) failed");
return EditorBase::ToGenericNSResult(rv);
}
if (current.IsEmpty()) {
return NS_OK;
}
nsString wrapped;
uint32_t firstLineOffset = 0; // XXX need to reset this if there is a
// selection
InternetCiter::Rewrap(current, wrapWidth, firstLineOffset, aRespectNewlines,
wrapped);
if (isCollapsed) {
DebugOnly<nsresult> rvIgnored = SelectAllInternal();
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"HTMLEditor::SelectAllInternal() failed");
}
// The whole operation in InsertTextWithQuotationsInternal() should be
// undoable in one transaction.
// XXX Why isn't enough to use only AutoPlaceholderBatch here?
AutoTransactionBatch bundleAllTransactions(*this, __FUNCTION__);
AutoPlaceholderBatch treatAsOneTransaction(
*this, ScrollSelectionIntoView::Yes, __FUNCTION__);
rv = InsertTextWithQuotationsInternal(wrapped);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"HTMLEditor::InsertTextWithQuotationsInternal() failed");
return EditorBase::ToGenericNSResult(rv);
}
NS_IMETHODIMP HTMLEditor::InsertAsCitedQuotation(const nsAString& aQuotedText,
const nsAString& aCitation,
bool aInsertHTML,
nsINode** aNodeInserted) {
// Don't let anyone insert HTML when we're in plaintext mode.
if (IsInPlaintextMode()) {
NS_ASSERTION(
!aInsertHTML,
"InsertAsCitedQuotation: trying to insert html into plaintext editor");
AutoEditActionDataSetter editActionData(*this, EditAction::eInsertText);
MOZ_ASSERT(!aQuotedText.IsVoid());
editActionData.SetData(aQuotedText);
nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(
rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"CanHandleAndMaybeDispatchBeforeInputEvent(), failed");
return EditorBase::ToGenericNSResult(rv);
}
AutoPlaceholderBatch treatAsOneTransaction(
*this, ScrollSelectionIntoView::Yes, __FUNCTION__);
rv = InsertAsPlaintextQuotation(aQuotedText, true, aNodeInserted);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"HTMLEditor::InsertAsPlaintextQuotation() failed");
return EditorBase::ToGenericNSResult(rv);
}
AutoEditActionDataSetter editActionData(*this,
EditAction::eInsertBlockquoteElement);
nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent();
if (NS_FAILED(rv)) {
NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED,
"CanHandleAndMaybeDispatchBeforeInputEvent(), failed");
return EditorBase::ToGenericNSResult(rv);
}
AutoPlaceholderBatch treatAsOneTransaction(
*this, ScrollSelectionIntoView::Yes, __FUNCTION__);
rv = InsertAsCitedQuotationInternal(aQuotedText, aCitation, aInsertHTML,
aNodeInserted);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"HTMLEditor::InsertAsCitedQuotationInternal() failed");
return EditorBase::ToGenericNSResult(rv);
}
nsresult HTMLEditor::InsertAsCitedQuotationInternal(
const nsAString& aQuotedText, const nsAString& aCitation, bool aInsertHTML,
nsINode** aNodeInserted) {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT(!IsInPlaintextMode());
if (IsReadonly()) {
return NS_OK;
}
EditActionResult result = CanHandleHTMLEditSubAction();
if (result.Failed() || result.Canceled()) {
NS_WARNING_ASSERTION(result.Succeeded(),
"HTMLEditor::CanHandleHTMLEditSubAction() failed");
return result.Rv();
}
UndefineCaretBidiLevel();
IgnoredErrorResult ignoredError;
AutoEditSubActionNotifier startToHandleEditSubAction(
*this, EditSubAction::eInsertQuotation, nsIEditor::eNext, ignoredError);
if (NS_WARN_IF(ignoredError.ErrorCodeIs(NS_ERROR_EDITOR_DESTROYED))) {
return ignoredError.StealNSResult();
}
NS_WARNING_ASSERTION(
!ignoredError.Failed(),
"HTMLEditor::OnStartToHandleTopLevelEditSubAction() failed, but ignored");
nsresult rv = EnsureNoPaddingBRElementForEmptyEditor();
if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::EnsureNoPaddingBRElementForEmptyEditor() "
"failed, but ignored");
if (NS_SUCCEEDED(rv) && SelectionRef().IsCollapsed()) {
nsresult rv = EnsureCaretNotAfterInvisibleBRElement();
if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"HTMLEditor::EnsureCaretNotAfterInvisibleBRElement() "
"failed, but ignored");
if (NS_SUCCEEDED(rv)) {
nsresult rv = PrepareInlineStylesForCaret();
if (NS_WARN_IF(rv == NS_ERROR_EDITOR_DESTROYED)) {
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"HTMLEditor::PrepareInlineStylesForCaret() failed, but ignored");
}
}
Result<RefPtr<Element>, nsresult> blockquoteElementOrError =
DeleteSelectionAndCreateElement(
*nsGkAtoms::blockquote,
// MOZ_CAN_RUN_SCRIPT_BOUNDARY due to bug 1758868
[&aCitation](HTMLEditor&, Element& aBlockquoteElement,
const EditorDOMPoint&) MOZ_CAN_RUN_SCRIPT_BOUNDARY {
// Try to set type=cite. Ignore it if this fails.
DebugOnly<nsresult> rvIgnored = aBlockquoteElement.SetAttr(
kNameSpaceID_None, nsGkAtoms::type, u"cite"_ns,
aBlockquoteElement.IsInComposedDoc());
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
nsPrintfCString(
"Element::SetAttr(nsGkAtoms::type, \"cite\", %s) failed, "
"but ignored",
aBlockquoteElement.IsInComposedDoc() ? "true" : "false")
.get());
if (!aCitation.IsEmpty()) {
DebugOnly<nsresult> rvIgnored = aBlockquoteElement.SetAttr(
kNameSpaceID_None, nsGkAtoms::cite, aCitation,
aBlockquoteElement.IsInComposedDoc());
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rvIgnored),
nsPrintfCString(
"Element::SetAttr(nsGkAtoms::cite, \"...\", %s) failed, "
"but ignored",
aBlockquoteElement.IsInComposedDoc() ? "true" : "false")
.get());
}
return NS_OK;
});
if (MOZ_UNLIKELY(blockquoteElementOrError.isErr() ||
NS_WARN_IF(Destroyed()))) {
NS_WARNING(
"HTMLEditor::DeleteSelectionAndCreateElement(nsGkAtoms::blockquote) "
"failed");
return Destroyed() ? NS_ERROR_EDITOR_DESTROYED
: blockquoteElementOrError.unwrapErr();
}
MOZ_ASSERT(blockquoteElementOrError.inspect());
// Set the selection inside the blockquote so aQuotedText will go there:
rv = CollapseSelectionTo(
EditorRawDOMPoint(blockquoteElementOrError.inspect(), 0u));
if (MOZ_UNLIKELY(rv == NS_ERROR_EDITOR_DESTROYED)) {
NS_WARNING(
"EditorBase::CollapseSelectionTo() caused destroying the editor");
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"EditorBase::CollapseSelectionTo() failed, but ignored");
// TODO: We should insert text at specific point rather than at selection.
// Then, we can do this before inserting the <blockquote> element.
if (aInsertHTML) {
rv = LoadHTML(aQuotedText);
if (NS_WARN_IF(Destroyed())) {
return NS_ERROR_EDITOR_DESTROYED;
}
if (NS_FAILED(rv)) {
NS_WARNING("HTMLEditor::LoadHTML() failed");
return rv;
}
} else {
rv = InsertTextAsSubAction(
aQuotedText, SelectionHandling::Delete); // XXX ignore charset
if (NS_WARN_IF(Destroyed())) {
return NS_ERROR_EDITOR_DESTROYED;
}
if (NS_FAILED(rv)) {
NS_WARNING("HTMLEditor::LoadHTML() failed");
return rv;
}
}
// Set the selection to just after the inserted node:
EditorRawDOMPoint afterNewBlockquoteElement(
EditorRawDOMPoint::After(blockquoteElementOrError.inspect()));
NS_WARNING_ASSERTION(
afterNewBlockquoteElement.IsSet(),
"Failed to set after new <blockquote> element, but ignored");
if (afterNewBlockquoteElement.IsSet()) {
nsresult rv = CollapseSelectionTo(afterNewBlockquoteElement);
if (MOZ_UNLIKELY(rv == NS_ERROR_EDITOR_DESTROYED)) {
NS_WARNING(
"EditorBase::CollapseSelectionTo() caused destroying the editor");
return NS_ERROR_EDITOR_DESTROYED;
}
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"EditorBase::CollapseSelectionTo() failed, but ignored");
}
if (aNodeInserted) {
blockquoteElementOrError.unwrap().forget(aNodeInserted);
}
return NS_OK;
}
void HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator::
RemoveHeadChildAndStealBodyChildsChildren(nsINode& aNode) {
nsCOMPtr<nsIContent> body, head;
// find the body and head nodes if any.
// look only at immediate children of aNode.
for (nsCOMPtr<nsIContent> child = aNode.GetFirstChild(); child;
child = child->GetNextSibling()) {
if (child->IsHTMLElement(nsGkAtoms::body)) {
body = child;
} else if (child->IsHTMLElement(nsGkAtoms::head)) {
head = child;
}
}
if (head) {
ErrorResult ignored;
aNode.RemoveChild(*head, ignored);
}
if (body) {
nsCOMPtr<nsIContent> child = body->GetFirstChild();
while (child) {
ErrorResult ignored;
aNode.InsertBefore(*child, body, ignored);
child = body->GetFirstChild();
}
ErrorResult ignored;
aNode.RemoveChild(*body, ignored);
}
}
// static
void HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator::
RemoveIncompleteDescendantsFromInsertingFragment(nsINode& aNode) {
nsIContent* child = aNode.GetFirstChild();
while (child) {
bool isEmptyNodeShouldNotInserted = false;
if (HTMLEditUtils::IsAnyListElement(child)) {
// Current limitation of HTMLEditor:
// Cannot put caret in a list element which does not have list item
// element even as a descendant. I.e., HTMLEditor does not support
// editing in such empty list element, and does not support to delete
// it from outside. Therefore, HTMLWithContextInserter should not
// insert empty list element.
isEmptyNodeShouldNotInserted = HTMLEditUtils::IsEmptyNode(
*child,
{// Although we don't check relation between list item element
// and parent list element, but it should not be a problem in the
// wild because appearing such invalid list element is an edge case
// and anyway HTMLEditor supports editing in them.
EmptyCheckOption::TreatListItemAsVisible,
// Ignore editable state because non-editable list item element
// may make the list element visible. Although HTMLEditor does not
// support to edit list elements which have only non-editable list
// item elements, but it should be deleted from outside.
// TODO: Currently, HTMLEditor does not support deleting such list
// element with Backspace. We should fix this.
EmptyCheckOption::IgnoreEditableState});
}
// TODO: Perhaps, we should delete <table>s if they have no <td>/<th>
// element, or something other elements which must have specific
// children but they don't.
if (isEmptyNodeShouldNotInserted) {
nsIContent* nextChild = child->GetNextSibling();
OwningNonNull<nsIContent> removingChild(*child);
removingChild->Remove();
child = nextChild;
continue;
}
if (child->HasChildNodes()) {
RemoveIncompleteDescendantsFromInsertingFragment(*child);
}
child = child->GetNextSibling();
}
}
// static
bool HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator::
IsInsertionCookie(const nsIContent& aContent) {
// Is this child the magical cookie?
if (const auto* comment = Comment::FromNode(&aContent)) {
nsAutoString data;
comment->GetData(data);
return data.EqualsLiteral(kInsertCookie);
}
return false;
}
/**
* This function finds the target node that we will be pasting into. aStart is
* the context that we're given and aResult will be the target. Initially,
* *aResult must be nullptr.
*
* The target for a paste is found by either finding the node that contains
* the magical comment node containing kInsertCookie or, failing that, the
* firstChild of the firstChild (until we reach a leaf).
*/
bool HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator::
FindTargetNodeOfContextForPastedHTMLAndRemoveInsertionCookie(
nsINode& aStart, nsCOMPtr<nsINode>& aResult) {
nsIContent* firstChild = aStart.GetFirstChild();
if (!firstChild) {
// If the current result is nullptr, then aStart is a leaf, and is the
// fallback result.
if (!aResult) {
aResult = &aStart;
}
return false;
}
for (nsCOMPtr<nsIContent> child = firstChild; child;
child = child->GetNextSibling()) {
if (FragmentFromPasteCreator::IsInsertionCookie(*child)) {
// Yes it is! Return an error so we bubble out and short-circuit the
// search.
aResult = &aStart;
child->Remove();
return true;
}
if (FindTargetNodeOfContextForPastedHTMLAndRemoveInsertionCookie(*child,
aResult)) {
return true;
}
}
return false;
}
class MOZ_STACK_CLASS HTMLEditor::HTMLWithContextInserter::FragmentParser
final {
public:
FragmentParser(const Document& aDocument, bool aTrustedInput);
[[nodiscard]] nsresult ParseContext(const nsAString& aContextString,
DocumentFragment** aFragment);
[[nodiscard]] nsresult ParsePastedHTML(const nsAString& aInputString,
nsAtom* aContextLocalNameAtom,
DocumentFragment** aFragment);
private:
static nsresult ParseFragment(const nsAString& aStr,
nsAtom* aContextLocalName,
const Document* aTargetDoc,
dom::DocumentFragment** aFragment,
bool aTrustedInput);
const Document& mDocument;
const bool mTrustedInput;
};
HTMLEditor::HTMLWithContextInserter::FragmentParser::FragmentParser(
const Document& aDocument, bool aTrustedInput)
: mDocument{aDocument}, mTrustedInput{aTrustedInput} {}
nsresult HTMLEditor::HTMLWithContextInserter::FragmentParser::ParseContext(
const nsAString& aContextStr, DocumentFragment** aFragment) {
return FragmentParser::ParseFragment(aContextStr, nullptr, &mDocument,
aFragment, mTrustedInput);
}
nsresult HTMLEditor::HTMLWithContextInserter::FragmentParser::ParsePastedHTML(
const nsAString& aInputString, nsAtom* aContextLocalNameAtom,
DocumentFragment** aFragment) {
return FragmentParser::ParseFragment(aInputString, aContextLocalNameAtom,
&mDocument, aFragment, mTrustedInput);
}
nsresult HTMLEditor::HTMLWithContextInserter::CreateDOMFragmentFromPaste(
const nsAString& aInputString, const nsAString& aContextStr,
const nsAString& aInfoStr, nsCOMPtr<nsINode>* aOutFragNode,
nsCOMPtr<nsINode>* aOutStartNode, nsCOMPtr<nsINode>* aOutEndNode,
uint32_t* aOutStartOffset, uint32_t* aOutEndOffset,
bool aTrustedInput) const {
if (NS_WARN_IF(!aOutFragNode) || NS_WARN_IF(!aOutStartNode) ||
NS_WARN_IF(!aOutEndNode) || NS_WARN_IF(!aOutStartOffset) ||
NS_WARN_IF(!aOutEndOffset)) {
return NS_ERROR_INVALID_ARG;
}
RefPtr<const Document> document = mHTMLEditor.GetDocument();
if (NS_WARN_IF(!document)) {
return NS_ERROR_FAILURE;
}
FragmentFromPasteCreator fragmentFromPasteCreator;
const nsresult rv = fragmentFromPasteCreator.Run(
*document, aInputString, aContextStr, aInfoStr, aOutFragNode,
aOutStartNode, aOutEndNode, aTrustedInput);
*aOutStartOffset = 0;
*aOutEndOffset = (*aOutEndNode)->Length();
return rv;
}
// static
nsAtom* HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator::
DetermineContextLocalNameForParsingPastedHTML(
const nsIContent* aParentContentOfPastedHTMLInContext) {
if (!aParentContentOfPastedHTMLInContext) {
return nsGkAtoms::body;
}
nsAtom* contextLocalNameAtom =
aParentContentOfPastedHTMLInContext->NodeInfo()->NameAtom();
return (aParentContentOfPastedHTMLInContext->IsHTMLElement(nsGkAtoms::html))
? nsGkAtoms::body
: contextLocalNameAtom;
}
// static
nsresult HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator::
MergeAndPostProcessFragmentsForPastedHTMLAndContext(
DocumentFragment& aDocumentFragmentForPastedHTML,
DocumentFragment& aDocumentFragmentForContext,
nsIContent& aTargetContentOfContextForPastedHTML) {
FragmentFromPasteCreator::RemoveHeadChildAndStealBodyChildsChildren(
aDocumentFragmentForPastedHTML);
FragmentFromPasteCreator::RemoveIncompleteDescendantsFromInsertingFragment(
aDocumentFragmentForPastedHTML);
// unite the two trees
IgnoredErrorResult ignoredError;
aTargetContentOfContextForPastedHTML.AppendChild(
aDocumentFragmentForPastedHTML, ignoredError);
NS_WARNING_ASSERTION(!ignoredError.Failed(),
"nsINode::AppendChild() failed, but ignored");
const nsresult rv = FragmentFromPasteCreator::
RemoveNonPreWhiteSpaceOnlyTextNodesForIgnoringInvisibleWhiteSpaces(
aDocumentFragmentForContext, NodesToRemove::eOnlyListItems);
if (NS_FAILED(rv)) {
NS_WARNING(
"HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator::"
"RemoveNonPreWhiteSpaceOnlyTextNodesForIgnoringInvisibleWhiteSpaces()"
" failed");
return rv;
}
return rv;
}
// static
nsresult HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator::
PostProcessFragmentForPastedHTMLWithoutContext(
DocumentFragment& aDocumentFragmentForPastedHTML) {
FragmentFromPasteCreator::RemoveHeadChildAndStealBodyChildsChildren(
aDocumentFragmentForPastedHTML);
FragmentFromPasteCreator::RemoveIncompleteDescendantsFromInsertingFragment(
aDocumentFragmentForPastedHTML);
const nsresult rv = FragmentFromPasteCreator::
RemoveNonPreWhiteSpaceOnlyTextNodesForIgnoringInvisibleWhiteSpaces(
aDocumentFragmentForPastedHTML, NodesToRemove::eOnlyListItems);
if (NS_FAILED(rv)) {
NS_WARNING(
"HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator::"
"RemoveNonPreWhiteSpaceOnlyTextNodesForIgnoringInvisibleWhiteSpaces() "
"failed");
return rv;
}
return rv;
}
// static
nsresult HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator::
PreProcessContextDocumentFragmentForMerging(
DocumentFragment& aDocumentFragmentForContext) {
// The context is expected to contain text nodes only in block level
// elements. Hence, if they contain only whitespace, they're invisible.
const nsresult rv = FragmentFromPasteCreator::
RemoveNonPreWhiteSpaceOnlyTextNodesForIgnoringInvisibleWhiteSpaces(
aDocumentFragmentForContext, NodesToRemove::eAll);
if (NS_FAILED(rv)) {
NS_WARNING(
"HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator::"
"RemoveNonPreWhiteSpaceOnlyTextNodesForIgnoringInvisibleWhiteSpaces() "
"failed");
return rv;
}
FragmentFromPasteCreator::RemoveHeadChildAndStealBodyChildsChildren(
aDocumentFragmentForContext);
return rv;
}
nsresult HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator::
CreateDocumentFragmentAndGetParentOfPastedHTMLInContext(
const Document& aDocument, const nsAString& aInputString,
const nsAString& aContextStr, bool aTrustedInput,
nsCOMPtr<nsINode>& aParentNodeOfPastedHTMLInContext,
RefPtr<DocumentFragment>& aDocumentFragmentToInsert) const {
// if we have context info, create a fragment for that
RefPtr<DocumentFragment> documentFragmentForContext;
FragmentParser fragmentParser{aDocument, aTrustedInput};
if (!aContextStr.IsEmpty()) {
nsresult rv = fragmentParser.ParseContext(
aContextStr, getter_AddRefs(documentFragmentForContext));
if (NS_FAILED(rv)) {
NS_WARNING(
"HTMLEditor::HTMLWithContextInserter::FragmentParser::ParseContext() "
"failed");
return rv;
}
if (!documentFragmentForContext) {
NS_WARNING(
"HTMLEditor::HTMLWithContextInserter::FragmentParser::ParseContext() "
"returned nullptr");
return NS_ERROR_FAILURE;
}
rv = FragmentFromPasteCreator::PreProcessContextDocumentFragmentForMerging(
*documentFragmentForContext);
if (NS_FAILED(rv)) {
NS_WARNING(
"HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator::"
"PreProcessContextDocumentFragmentForMerging() failed.");
return rv;
}
FragmentFromPasteCreator::
FindTargetNodeOfContextForPastedHTMLAndRemoveInsertionCookie(
*documentFragmentForContext, aParentNodeOfPastedHTMLInContext);
MOZ_ASSERT(aParentNodeOfPastedHTMLInContext);
}
nsCOMPtr<nsIContent> parentContentOfPastedHTMLInContext =
nsIContent::FromNodeOrNull(aParentNodeOfPastedHTMLInContext);
MOZ_ASSERT_IF(aParentNodeOfPastedHTMLInContext,
parentContentOfPastedHTMLInContext);
nsAtom* contextLocalNameAtom =
FragmentFromPasteCreator::DetermineContextLocalNameForParsingPastedHTML(
parentContentOfPastedHTMLInContext);
RefPtr<DocumentFragment> documentFragmentForPastedHTML;
nsresult rv = fragmentParser.ParsePastedHTML(
aInputString, contextLocalNameAtom,
getter_AddRefs(documentFragmentForPastedHTML));
if (NS_FAILED(rv)) {
NS_WARNING(
"HTMLEditor::HTMLWithContextInserter::FragmentParser::ParsePastedHTML()"
" failed");
return rv;
}
if (!documentFragmentForPastedHTML) {
NS_WARNING(
"HTMLEditor::HTMLWithContextInserter::FragmentParser::ParsePastedHTML()"
" returned nullptr");
return NS_ERROR_FAILURE;
}
if (aParentNodeOfPastedHTMLInContext) {
const nsresult rv = FragmentFromPasteCreator::
MergeAndPostProcessFragmentsForPastedHTMLAndContext(
*documentFragmentForPastedHTML, *documentFragmentForContext,
*parentContentOfPastedHTMLInContext);
if (NS_FAILED(rv)) {
NS_WARNING(
"HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator::"
"MergeAndPostProcessFragmentsForPastedHTMLAndContext() failed.");
return rv;
}
aDocumentFragmentToInsert = std::move(documentFragmentForContext);
} else {
const nsresult rv = PostProcessFragmentForPastedHTMLWithoutContext(
*documentFragmentForPastedHTML);
if (NS_FAILED(rv)) {
NS_WARNING(
"HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator::"
"PostProcessFragmentForPastedHTMLWithoutContext() failed.");
return rv;
}
aDocumentFragmentToInsert = std::move(documentFragmentForPastedHTML);
}
return rv;
}
nsresult HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator::Run(
const Document& aDocument, const nsAString& aInputString,
const nsAString& aContextStr, const nsAString& aInfoStr,
nsCOMPtr<nsINode>* aOutFragNode, nsCOMPtr<nsINode>* aOutStartNode,
nsCOMPtr<nsINode>* aOutEndNode, bool aTrustedInput) const {
MOZ_ASSERT(aOutFragNode);
MOZ_ASSERT(aOutStartNode);
MOZ_ASSERT(aOutEndNode);
nsCOMPtr<nsINode> parentNodeOfPastedHTMLInContext;
RefPtr<DocumentFragment> documentFragmentToInsert;
nsresult rv = CreateDocumentFragmentAndGetParentOfPastedHTMLInContext(
aDocument, aInputString, aContextStr, aTrustedInput,
parentNodeOfPastedHTMLInContext, documentFragmentToInsert);
if (NS_FAILED(rv)) {
NS_WARNING(
"HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator::"
"CreateDocumentFragmentAndGetParentOfPastedHTMLInContext() failed.");
return rv;
}
// If there was no context, then treat all of the data we did get as the
// pasted data.
if (parentNodeOfPastedHTMLInContext) {
*aOutEndNode = *aOutStartNode = parentNodeOfPastedHTMLInContext;
} else {
*aOutEndNode = *aOutStartNode = documentFragmentToInsert;
}
*aOutFragNode = std::move(documentFragmentToInsert);
if (!aInfoStr.IsEmpty()) {
const nsresult rv =
FragmentFromPasteCreator::MoveStartAndEndAccordingToHTMLInfo(
aInfoStr, aOutStartNode, aOutEndNode);
if (NS_FAILED(rv)) {
NS_WARNING(
"HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator::"
"MoveStartAndEndAccordingToHTMLInfo() failed");
return rv;
}
}
return NS_OK;
}
// static
nsresult HTMLEditor::HTMLWithContextInserter::FragmentFromPasteCreator::
MoveStartAndEndAccordingToHTMLInfo(const nsAString& aInfoStr,
nsCOMPtr<nsINode>* aOutStartNode,
nsCOMPtr<nsINode>* aOutEndNode) {
int32_t sep = aInfoStr.FindChar((char16_t)',');
nsAutoString numstr1(Substring(aInfoStr, 0, sep));
nsAutoString numstr2(
Substring(aInfoStr, sep + 1, aInfoStr.Length() - (sep + 1)));
// Move the start and end children.
nsresult rvIgnored;
int32_t num = numstr1.ToInteger(&rvIgnored);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored),
"nsAString::ToInteger() failed, but ignored");
while (num--) {
nsINode* tmp = (*aOutStartNode)->GetFirstChild();
if (!tmp) {
NS_WARNING("aOutStartNode did not have children");
return NS_ERROR_FAILURE;
}
*aOutStartNode = tmp;
}
num = numstr2.ToInteger(&rvIgnored);
while (num--) {
nsINode* tmp = (*aOutEndNode)->GetLastChild();
if (!tmp) {
NS_WARNING("aOutEndNode did not have children");
return NS_ERROR_FAILURE;
}
*aOutEndNode = tmp;
}
return NS_OK;
}
// static
nsresult HTMLEditor::HTMLWithContextInserter::FragmentParser::ParseFragment(
const nsAString& aFragStr, nsAtom* aContextLocalName,
const Document* aTargetDocument, DocumentFragment** aFragment,
bool aTrustedInput) {
nsAutoScriptBlockerSuppressNodeRemoved autoBlocker;
nsCOMPtr<Document> doc =
nsContentUtils::CreateInertHTMLDocument(aTargetDocument);
if (!doc) {
return NS_ERROR_FAILURE;
}
RefPtr<DocumentFragment> fragment =
new (doc->NodeInfoManager()) DocumentFragment(doc->NodeInfoManager());
nsresult rv = nsContentUtils::ParseFragmentHTML(
aFragStr, fragment,
aContextLocalName ? aContextLocalName : nsGkAtoms::body,
kNameSpaceID_XHTML, false, true);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"nsContentUtils::ParseFragmentHTML() failed");
if (!aTrustedInput) {
nsTreeSanitizer sanitizer(aContextLocalName
? nsIParserUtils::SanitizerAllowStyle
: nsIParserUtils::SanitizerAllowComments);
sanitizer.Sanitize(fragment);
}
fragment.forget(aFragment);
return rv;
}
// static
void HTMLEditor::HTMLWithContextInserter::
CollectTopMostChildContentsCompletelyInRange(
const EditorRawDOMPoint& aStartPoint,
const EditorRawDOMPoint& aEndPoint,
nsTArray<OwningNonNull<nsIContent>>& aOutArrayOfContents) {
MOZ_ASSERT(aStartPoint.IsSetAndValid());
MOZ_ASSERT(aEndPoint.IsSetAndValid());
RefPtr<nsRange> range =
nsRange::Create(aStartPoint.ToRawRangeBoundary(),
aEndPoint.ToRawRangeBoundary(), IgnoreErrors());
if (!range) {
NS_WARNING("nsRange::Create() failed");
return;
}
DOMSubtreeIterator iter;
if (NS_FAILED(iter.Init(*range))) {
NS_WARNING("DOMSubtreeIterator::Init() failed, but ignored");
return;
}
iter.AppendAllNodesToArray(aOutArrayOfContents);
}
/******************************************************************************
* HTMLEditor::AutoHTMLFragmentBoundariesFixer
******************************************************************************/
HTMLEditor::AutoHTMLFragmentBoundariesFixer::AutoHTMLFragmentBoundariesFixer(
nsTArray<OwningNonNull<nsIContent>>& aArrayOfTopMostChildContents) {
EnsureBeginsOrEndsWithValidContent(StartOrEnd::start,
aArrayOfTopMostChildContents);
EnsureBeginsOrEndsWithValidContent(StartOrEnd::end,
aArrayOfTopMostChildContents);
}
// static
void HTMLEditor::AutoHTMLFragmentBoundariesFixer::
CollectTableAndAnyListElementsOfInclusiveAncestorsAt(
nsIContent& aContent,
nsTArray<OwningNonNull<Element>>& aOutArrayOfListAndTableElements) {
for (Element* element = aContent.GetAsElementOrParentElement(); element;
element = element->GetParentElement()) {
if (HTMLEditUtils::IsAnyListElement(element) ||
HTMLEditUtils::IsTable(element)) {
aOutArrayOfListAndTableElements.AppendElement(*element);
}
}
}
// static
Element* HTMLEditor::AutoHTMLFragmentBoundariesFixer::
GetMostDistantAncestorListOrTableElement(
const nsTArray<OwningNonNull<nsIContent>>& aArrayOfTopMostChildContents,
const nsTArray<OwningNonNull<Element>>&
aInclusiveAncestorsTableOrListElements) {
Element* lastFoundAncestorListOrTableElement = nullptr;
for (auto& content : aArrayOfTopMostChildContents) {
if (HTMLEditUtils::IsAnyTableElementButNotTable(content)) {
Element* tableElement =
HTMLEditUtils::GetClosestAncestorTableElement(*content);
if (!tableElement) {
continue;
}
// If we find a `<table>` element which is an ancestor of a table
// related element and is not an acestor of first nor last of
// aArrayOfNodes, return the last found list or `<table>` element.
// XXX Is that really expected that this returns a list element in this
// case?
if (!aInclusiveAncestorsTableOrListElements.Contains(tableElement)) {
return lastFoundAncestorListOrTableElement;
}
// If we find a `<table>` element which is topmost list or `<table>`
// element at first or last of aArrayOfNodes, return it.
if (aInclusiveAncestorsTableOrListElements.LastElement().get() ==
tableElement) {
return tableElement;
}
// Otherwise, store the `<table>` element which is an ancestor but
// not topmost ancestor of first or last of aArrayOfNodes.
lastFoundAncestorListOrTableElement = tableElement;
continue;
}
if (!HTMLEditUtils::IsListItem(content)) {
continue;
}
Element* listElement =
HTMLEditUtils::GetClosestAncestorAnyListElement(*content);
if (!listElement) {
continue;
}
// If we find a list element which is ancestor of a list item element and
// is not an acestor of first nor last of aArrayOfNodes, return the last
// found list or `<table>` element.
// XXX Is that really expected that this returns a `<table>` element in
// this case?
if (!aInclusiveAncestorsTableOrListElements.Contains(listElement)) {
return lastFoundAncestorListOrTableElement;
}
// If we find a list element which is topmost list or `<table>` element at
// first or last of aArrayOfNodes, return it.
if (aInclusiveAncestorsTableOrListElements.LastElement().get() ==
listElement) {
return listElement;
}
// Otherwise, store the list element which is an ancestor but not topmost
// ancestor of first or last of aArrayOfNodes.
lastFoundAncestorListOrTableElement = listElement;
}
// If we find only non-topmost list or `<table>` element, returns the last
// found one (meaning bottommost one). Otherwise, nullptr.
return lastFoundAncestorListOrTableElement;
}
Element*
HTMLEditor::AutoHTMLFragmentBoundariesFixer::FindReplaceableTableElement(
Element& aTableElement, nsIContent& aContentMaybeInTableElement) const {
MOZ_ASSERT(aTableElement.IsHTMLElement(nsGkAtoms::table));
// Perhaps, this is designed for climbing up the DOM tree from
// aContentMaybeInTableElement to aTableElement and making sure that
// aContentMaybeInTableElement itself or its ancestor is a `<td>`, `<th>`,
// `<tr>`, `<thead>`, `<tbody>`, `<tfoot>` or `<caption>`.
// But this looks really buggy because this loop may skip aTableElement
// as the following NS_ASSERTION. We should write automated tests and
// check right behavior.
for (Element* element =
aContentMaybeInTableElement.GetAsElementOrParentElement();
element; element = element->GetParentElement()) {
if (!HTMLEditUtils::IsAnyTableElement(element) ||
element->IsHTMLElement(nsGkAtoms::table)) {
// XXX Perhaps, the original developer of this method assumed that
// aTableElement won't be skipped because if it's assumed, we can
// stop climbing up the tree in that case.
NS_ASSERTION(element != &aTableElement,
"The table element which is looking for is ignored");
continue;
}
Element* tableElement = nullptr;
for (Element* maybeTableElement = element->GetParentElement();
maybeTableElement;
maybeTableElement = maybeTableElement->GetParentElement()) {
if (maybeTableElement->IsHTMLElement(nsGkAtoms::table)) {
tableElement = maybeTableElement;
break;
}
}
if (tableElement == &aTableElement) {
return element;
}
// XXX If we find another `<table>` element, why don't we keep searching
// from its parent?
}
return nullptr;
}
bool HTMLEditor::AutoHTMLFragmentBoundariesFixer::IsReplaceableListElement(
Element& aListElement, nsIContent& aContentMaybeInListElement) const {
MOZ_ASSERT(HTMLEditUtils::IsAnyListElement(&aListElement));
// Perhaps, this is designed for climbing up the DOM tree from
// aContentMaybeInListElement to aListElement and making sure that
// aContentMaybeInListElement itself or its ancestor is an list item.
// But this looks really buggy because this loop may skip aListElement
// as the following NS_ASSERTION. We should write automated tests and
// check right behavior.
for (Element* element =
aContentMaybeInListElement.GetAsElementOrParentElement();
element; element = element->GetParentElement()) {
if (!HTMLEditUtils::IsListItem(element)) {
// XXX Perhaps, the original developer of this method assumed that
// aListElement won't be skipped because if it's assumed, we can
// stop climbing up the tree in that case.
NS_ASSERTION(element != &aListElement,
"The list element which is looking for is ignored");
continue;
}
Element* listElement =
HTMLEditUtils::GetClosestAncestorAnyListElement(*element);
if (listElement == &aListElement) {
return true;
}
// XXX If we find another list element, why don't we keep searching
// from its parent?
}
return false;
}
void HTMLEditor::AutoHTMLFragmentBoundariesFixer::
EnsureBeginsOrEndsWithValidContent(StartOrEnd aStartOrEnd,
nsTArray<OwningNonNull<nsIContent>>&
aArrayOfTopMostChildContents) const {
MOZ_ASSERT(!aArrayOfTopMostChildContents.IsEmpty());
// Collect list elements and table related elements at first or last node
// in aArrayOfTopMostChildContents.
AutoTArray<OwningNonNull<Element>, 4> inclusiveAncestorsListOrTableElements;
CollectTableAndAnyListElementsOfInclusiveAncestorsAt(
aStartOrEnd == StartOrEnd::end
? aArrayOfTopMostChildContents.LastElement()
: aArrayOfTopMostChildContents[0],
inclusiveAncestorsListOrTableElements);
if (inclusiveAncestorsListOrTableElements.IsEmpty()) {
return;
}
// Get most ancestor list or `<table>` element in
// inclusiveAncestorsListOrTableElements which contains earlier
// node in aArrayOfTopMostChildContents as far as possible.
// XXX With inclusiveAncestorsListOrTableElements, this returns a
// list or `<table>` element which contains first or last node of
// aArrayOfTopMostChildContents. However, this seems slow when
// aStartOrEnd is StartOrEnd::end and only the last node is in
// different list or `<table>`. But I'm not sure whether it's
// possible case or not. We need to add tests to
// test_content_iterator_subtree.html for checking how
// SubtreeContentIterator works.
Element* listOrTableElement = GetMostDistantAncestorListOrTableElement(
aArrayOfTopMostChildContents, inclusiveAncestorsListOrTableElements);
if (!listOrTableElement) {
return;
}
// If we have pieces of tables or lists to be inserted, let's force the
// insertion to deal with table elements right away, so that it doesn't
// orphan some table or list contents outside the table or list.
OwningNonNull<nsIContent>& firstOrLastChildContent =
aStartOrEnd == StartOrEnd::end
? aArrayOfTopMostChildContents.LastElement()
: aArrayOfTopMostChildContents[0];
// Find substructure of list or table that must be included in paste.
Element* replaceElement;
if (HTMLEditUtils::IsAnyListElement(listOrTableElement)) {
if (!IsReplaceableListElement(*listOrTableElement,
firstOrLastChildContent)) {
return;
}
replaceElement = listOrTableElement;
} else {
MOZ_ASSERT(listOrTableElement->IsHTMLElement(nsGkAtoms::table));
replaceElement = FindReplaceableTableElement(*listOrTableElement,
firstOrLastChildContent);
if (!replaceElement) {
return;
}
}
// If we can replace the given list element or found a table related element
// in the `<table>` element, insert it into aArrayOfTopMostChildContents which
// is tompost children to be inserted instead of descendants of them in
// aArrayOfTopMostChildContents.
for (size_t i = 0; i < aArrayOfTopMostChildContents.Length();) {
OwningNonNull<nsIContent>& content = aArrayOfTopMostChildContents[i];
if (content == replaceElement) {
// If the element is n aArrayOfTopMostChildContents, its descendants must
// not be in the array. Therefore, we don't need to optimize this case.
// XXX Perhaps, we can break this loop right now.
aArrayOfTopMostChildContents.RemoveElementAt(i);
continue;
}
if (!EditorUtils::IsDescendantOf(content, *replaceElement)) {
i++;
continue;
}
// For saving number of calls of EditorUtils::IsDescendantOf(), we should
// remove its siblings in the array.
nsIContent* parent = content->GetParent();
aArrayOfTopMostChildContents.RemoveElementAt(i);
while (i < aArrayOfTopMostChildContents.Length() &&
aArrayOfTopMostChildContents[i]->GetParent() == parent) {
aArrayOfTopMostChildContents.RemoveElementAt(i);
}
}
// Now replace the removed nodes with the structural parent
if (aStartOrEnd == StartOrEnd::end) {
aArrayOfTopMostChildContents.AppendElement(*replaceElement);
} else {
aArrayOfTopMostChildContents.InsertElementAt(0, *replaceElement);
}
}
} // namespace mozilla
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