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Diffstat (limited to '')
| -rw-r--r-- | editor/libeditor/TextEditor.cpp | 1140 |
1 files changed, 1140 insertions, 0 deletions
diff --git a/editor/libeditor/TextEditor.cpp b/editor/libeditor/TextEditor.cpp new file mode 100644 index 0000000000..d5901850ad --- /dev/null +++ b/editor/libeditor/TextEditor.cpp @@ -0,0 +1,1140 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* 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 "TextEditor.h" + +#include <algorithm> + +#include "EditAction.h" +#include "EditAggregateTransaction.h" +#include "EditorDOMPoint.h" +#include "HTMLEditor.h" +#include "HTMLEditUtils.h" +#include "InternetCiter.h" +#include "PlaceholderTransaction.h" +#include "gfxFontUtils.h" + +#include "mozilla/dom/DocumentInlines.h" +#include "mozilla/Assertions.h" +#include "mozilla/ContentIterator.h" +#include "mozilla/IMEStateManager.h" +#include "mozilla/LookAndFeel.h" +#include "mozilla/mozalloc.h" +#include "mozilla/Preferences.h" +#include "mozilla/PresShell.h" +#include "mozilla/StaticPrefs_editor.h" +#include "mozilla/TextComposition.h" +#include "mozilla/TextEvents.h" +#include "mozilla/TextServicesDocument.h" +#include "mozilla/dom/Event.h" +#include "mozilla/dom/Element.h" +#include "mozilla/dom/Selection.h" +#include "mozilla/dom/StaticRange.h" + +#include "nsAString.h" +#include "nsCRT.h" +#include "nsCaret.h" +#include "nsCharTraits.h" +#include "nsComponentManagerUtils.h" +#include "nsContentCID.h" +#include "nsContentList.h" +#include "nsDebug.h" +#include "nsDependentSubstring.h" +#include "nsError.h" +#include "nsFocusManager.h" +#include "nsGkAtoms.h" +#include "nsIClipboard.h" +#include "nsIContent.h" +#include "nsINode.h" +#include "nsIPrincipal.h" +#include "nsISelectionController.h" +#include "nsISupportsPrimitives.h" +#include "nsITransferable.h" +#include "nsIWeakReferenceUtils.h" +#include "nsNameSpaceManager.h" +#include "nsLiteralString.h" +#include "nsPresContext.h" +#include "nsReadableUtils.h" +#include "nsServiceManagerUtils.h" +#include "nsString.h" +#include "nsStringFwd.h" +#include "nsTextFragment.h" +#include "nsTextNode.h" +#include "nsUnicharUtils.h" +#include "nsXPCOM.h" + +class nsIOutputStream; +class nsISupports; + +namespace mozilla { + +using namespace dom; + +using LeafNodeType = HTMLEditUtils::LeafNodeType; +using LeafNodeTypes = HTMLEditUtils::LeafNodeTypes; + +TextEditor::TextEditor() : EditorBase(EditorBase::EditorType::Text) { + // printf("Size of TextEditor: %zu\n", sizeof(TextEditor)); + static_assert( + sizeof(TextEditor) <= 512, + "TextEditor instance should be allocatable in the quantum class bins"); +} + +TextEditor::~TextEditor() { + // Remove event listeners. Note that if we had an HTML editor, + // it installed its own instead of these + RemoveEventListeners(); +} + +NS_IMPL_CYCLE_COLLECTION_CLASS(TextEditor) + +NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(TextEditor, EditorBase) + if (tmp->mPasswordMaskData) { + tmp->mPasswordMaskData->CancelTimer(PasswordMaskData::ReleaseTimer::No); + NS_IMPL_CYCLE_COLLECTION_UNLINK(mPasswordMaskData->mTimer) + } +NS_IMPL_CYCLE_COLLECTION_UNLINK_END + +NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(TextEditor, EditorBase) + if (tmp->mPasswordMaskData) { + NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPasswordMaskData->mTimer) + } +NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END + +NS_IMPL_ADDREF_INHERITED(TextEditor, EditorBase) +NS_IMPL_RELEASE_INHERITED(TextEditor, EditorBase) + +NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(TextEditor) + NS_INTERFACE_MAP_ENTRY(nsITimerCallback) + NS_INTERFACE_MAP_ENTRY(nsINamed) +NS_INTERFACE_MAP_END_INHERITING(EditorBase) + +NS_IMETHODIMP TextEditor::EndOfDocument() { + AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing); + if (NS_WARN_IF(!editActionData.CanHandle())) { + return NS_ERROR_NOT_INITIALIZED; + } + nsresult rv = CollapseSelectionToEndOfTextNode(); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), + "TextEditor::CollapseSelectionToEndOfTextNode() failed"); + // This is low level API for embedders and chrome script so that we can return + // raw error code here. + return rv; +} + +nsresult TextEditor::CollapseSelectionToEndOfTextNode() { + MOZ_ASSERT(IsEditActionDataAvailable()); + + Element* anonymousDivElement = GetRoot(); + if (NS_WARN_IF(!anonymousDivElement)) { + return NS_ERROR_NULL_POINTER; + } + + RefPtr<Text> textNode = + Text::FromNodeOrNull(anonymousDivElement->GetFirstChild()); + MOZ_ASSERT(textNode); + nsresult rv = CollapseSelectionToEndOf(*textNode); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), + "EditorBase::CollapseSelectionToEndOf() failed"); + return rv; +} + +nsresult TextEditor::Init(Document& aDocument, Element& aAnonymousDivElement, + nsISelectionController& aSelectionController, + uint32_t aFlags, + UniquePtr<PasswordMaskData>&& aPasswordMaskData) { + MOZ_ASSERT(!mInitSucceeded, + "TextEditor::Init() called again without calling PreDestroy()?"); + MOZ_ASSERT(!(aFlags & nsIEditor::eEditorPasswordMask) == !aPasswordMaskData); + mPasswordMaskData = std::move(aPasswordMaskData); + + // Init the base editor + nsresult rv = InitInternal(aDocument, &aAnonymousDivElement, + aSelectionController, aFlags); + if (NS_FAILED(rv)) { + NS_WARNING("EditorBase::InitInternal() failed"); + return rv; + } + + AutoEditActionDataSetter editActionData(*this, EditAction::eInitializing); + if (NS_WARN_IF(!editActionData.CanHandle())) { + return NS_ERROR_FAILURE; + } + + // We set mInitSucceeded here rather than at the end of the function, + // since InitEditorContentAndSelection() can perform some transactions + // and can warn if mInitSucceeded is still false. + MOZ_ASSERT(!mInitSucceeded, "TextEditor::Init() shouldn't be nested"); + mInitSucceeded = true; + + rv = InitEditorContentAndSelection(); + if (NS_FAILED(rv)) { + NS_WARNING("TextEditor::InitEditorContentAndSelection() failed"); + // XXX Shouldn't we expose `NS_ERROR_EDITOR_DESTROYED` even though this + // is a public method? + mInitSucceeded = false; + return EditorBase::ToGenericNSResult(rv); + } + + // Throw away the old transaction manager if this is not the first time that + // we're initializing the editor. + ClearUndoRedo(); + EnableUndoRedo(); + return NS_OK; +} + +nsresult TextEditor::InitEditorContentAndSelection() { + MOZ_ASSERT(IsEditActionDataAvailable()); + + MOZ_TRY(EnsureEmptyTextFirstChild()); + + // If the selection hasn't been set up yet, set it up collapsed to the end of + // our editable content. + if (!SelectionRef().RangeCount()) { + nsresult rv = CollapseSelectionToEndOfTextNode(); + if (NS_FAILED(rv)) { + NS_WARNING("EditorBase::CollapseSelectionToEndOfTextNode() failed"); + return rv; + } + } + + if (!IsSingleLineEditor()) { + nsresult rv = EnsurePaddingBRElementInMultilineEditor(); + if (NS_FAILED(rv)) { + NS_WARNING( + "EditorBase::EnsurePaddingBRElementInMultilineEditor() failed"); + return rv; + } + } + + return NS_OK; +} + +nsresult TextEditor::PostCreate() { + AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing); + if (NS_WARN_IF(!editActionData.CanHandle())) { + return NS_ERROR_NOT_INITIALIZED; + } + + nsresult rv = PostCreateInternal(); + + // Restore unmasked range if there is. + if (IsPasswordEditor() && !IsAllMasked()) { + DebugOnly<nsresult> rvIgnored = + SetUnmaskRangeAndNotify(UnmaskedStart(), UnmaskedLength()); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored), + "TextEditor::SetUnmaskRangeAndNotify() failed to " + "restore unmasked range, but ignored"); + } + NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), + "EditorBase::PostCreateInternal() failed"); + return rv; +} + +UniquePtr<PasswordMaskData> TextEditor::PreDestroy() { + if (mDidPreDestroy) { + return nullptr; + } + + UniquePtr<PasswordMaskData> passwordMaskData = std::move(mPasswordMaskData); + if (passwordMaskData) { + // Disable auto-masking timer since nobody can catch the notification + // from the timer and canceling the unmasking. + passwordMaskData->CancelTimer(PasswordMaskData::ReleaseTimer::Yes); + // Similary, keeping preventing echoing password temporarily across + // TextEditor instances is hard. So, we should forget it. + passwordMaskData->mEchoingPasswordPrevented = false; + } + + PreDestroyInternal(); + + return passwordMaskData; +} + +nsresult TextEditor::HandleKeyPressEvent(WidgetKeyboardEvent* aKeyboardEvent) { + // NOTE: When you change this method, you should also change: + // * editor/libeditor/tests/test_texteditor_keyevent_handling.html + // * editor/libeditor/tests/test_htmleditor_keyevent_handling.html + // + // And also when you add new key handling, you need to change the subclass's + // HandleKeyPressEvent()'s switch statement. + + if (NS_WARN_IF(!aKeyboardEvent)) { + return NS_ERROR_UNEXPECTED; + } + + if (IsReadonly()) { + HandleKeyPressEventInReadOnlyMode(*aKeyboardEvent); + return NS_OK; + } + + MOZ_ASSERT(aKeyboardEvent->mMessage == eKeyPress, + "HandleKeyPressEvent gets non-keypress event"); + + switch (aKeyboardEvent->mKeyCode) { + case NS_VK_META: + case NS_VK_WIN: + case NS_VK_SHIFT: + case NS_VK_CONTROL: + case NS_VK_ALT: + // FYI: This shouldn't occur since modifier key shouldn't cause eKeyPress + // event. + aKeyboardEvent->PreventDefault(); + return NS_OK; + + case NS_VK_BACK: + case NS_VK_DELETE: + case NS_VK_TAB: { + nsresult rv = EditorBase::HandleKeyPressEvent(aKeyboardEvent); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), + "EditorBase::HandleKeyPressEvent() failed"); + return rv; + } + case NS_VK_RETURN: { + if (!aKeyboardEvent->IsInputtingLineBreak()) { + return NS_OK; + } + if (!IsSingleLineEditor()) { + aKeyboardEvent->PreventDefault(); + } + // We need to dispatch "beforeinput" event at least even if we're a + // single line text editor. + nsresult rv = InsertLineBreakAsAction(); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), + "TextEditor::InsertLineBreakAsAction() failed"); + return rv; + } + } + + if (!aKeyboardEvent->IsInputtingText()) { + // we don't PreventDefault() here or keybindings like control-x won't work + return NS_OK; + } + // Our widget shouldn't set `\r` to `mCharCode`, but it may be synthesized + // keyboard event and its value may be `\r`. In such case, we should treat + // it as `\n` for the backward compatibility because we stopped converting + // `\r` and `\r\n` to `\n` at getting `HTMLInputElement.value` and + // `HTMLTextAreaElement.value` for the performance (i.e., we don't need to + // take care in `HTMLEditor`). + char16_t charCode = + static_cast<char16_t>(aKeyboardEvent->mCharCode) == nsCRT::CR + ? nsCRT::LF + : static_cast<char16_t>(aKeyboardEvent->mCharCode); + aKeyboardEvent->PreventDefault(); + nsAutoString str(charCode); + nsresult rv = OnInputText(str); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "EditorBase::OnInputText() failed"); + return rv; +} + +NS_IMETHODIMP TextEditor::InsertLineBreak() { + AutoEditActionDataSetter editActionData(*this, EditAction::eInsertLineBreak); + nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent(); + if (NS_FAILED(rv)) { + NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED, + "CanHandleAndMaybeDispatchBeforeInputEvent() failed"); + return EditorBase::ToGenericNSResult(rv); + } + + if (NS_WARN_IF(IsSingleLineEditor())) { + return NS_ERROR_FAILURE; + } + + AutoPlaceholderBatch treatAsOneTransaction( + *this, ScrollSelectionIntoView::Yes, __FUNCTION__); + rv = InsertLineBreakAsSubAction(); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), + "TextEditor::InsertLineBreakAsSubAction() failed"); + return EditorBase::ToGenericNSResult(rv); +} + +nsresult TextEditor::InsertLineBreakAsAction(nsIPrincipal* aPrincipal) { + AutoEditActionDataSetter editActionData(*this, EditAction::eInsertLineBreak, + aPrincipal); + nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent(); + if (NS_FAILED(rv)) { + NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED, + "CanHandleAndMaybeDispatchBeforeInputEvent() failed"); + return EditorBase::ToGenericNSResult(rv); + } + + if (IsSingleLineEditor()) { + return NS_OK; + } + + // XXX This may be called by execCommand() with "insertParagraph". + // In such case, naming the transaction "TypingTxnName" is odd. + AutoPlaceholderBatch treatAsOneTransaction(*this, *nsGkAtoms::TypingTxnName, + ScrollSelectionIntoView::Yes, + __FUNCTION__); + rv = InsertLineBreakAsSubAction(); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), + "EditorBase::InsertLineBreakAsSubAction() failed"); + return EditorBase::ToGenericNSResult(rv); +} + +nsresult TextEditor::SetTextAsAction( + const nsAString& aString, + AllowBeforeInputEventCancelable aAllowBeforeInputEventCancelable, + nsIPrincipal* aPrincipal) { + MOZ_ASSERT(aString.FindChar(nsCRT::CR) == kNotFound); + + AutoEditActionDataSetter editActionData(*this, EditAction::eSetText, + aPrincipal); + if (aAllowBeforeInputEventCancelable == AllowBeforeInputEventCancelable::No) { + editActionData.MakeBeforeInputEventNonCancelable(); + } + 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 = SetTextAsSubAction(aString); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), + "TextEditor::SetTextAsSubAction() failed"); + return EditorBase::ToGenericNSResult(rv); +} + +nsresult TextEditor::SetTextAsSubAction(const nsAString& aString) { + MOZ_ASSERT(IsEditActionDataAvailable()); + MOZ_ASSERT(mPlaceholderBatch); + + if (NS_WARN_IF(!mInitSucceeded)) { + return NS_ERROR_NOT_INITIALIZED; + } + + IgnoredErrorResult ignoredError; + AutoEditSubActionNotifier startToHandleEditSubAction( + *this, EditSubAction::eSetText, nsIEditor::eNext, ignoredError); + if (NS_WARN_IF(ignoredError.ErrorCodeIs(NS_ERROR_EDITOR_DESTROYED))) { + return ignoredError.StealNSResult(); + } + NS_WARNING_ASSERTION( + !ignoredError.Failed(), + "TextEditor::OnStartToHandleTopLevelEditSubAction() failed, but ignored"); + + if (!IsIMEComposing() && !IsUndoRedoEnabled() && + GetEditAction() != EditAction::eReplaceText && mMaxTextLength < 0) { + Result<EditActionResult, nsresult> result = + SetTextWithoutTransaction(aString); + if (MOZ_UNLIKELY(result.isErr())) { + NS_WARNING("TextEditor::SetTextWithoutTransaction() failed"); + return result.unwrapErr(); + } + if (!result.inspect().Ignored()) { + return NS_OK; + } + } + + { + // Note that do not notify selectionchange caused by selecting all text + // because it's preparation of our delete implementation so web apps + // shouldn't receive such selectionchange before the first mutation. + AutoUpdateViewBatch preventSelectionChangeEvent(*this, __FUNCTION__); + + // XXX We should make ReplaceSelectionAsSubAction() take range. Then, + // we can saving the expensive cost of modifying `Selection` here. + if (NS_SUCCEEDED(SelectEntireDocument())) { + DebugOnly<nsresult> rvIgnored = ReplaceSelectionAsSubAction(aString); + NS_WARNING_ASSERTION( + NS_SUCCEEDED(rvIgnored), + "EditorBase::ReplaceSelectionAsSubAction() failed, but ignored"); + } + } + + // Destroying AutoUpdateViewBatch may cause destroying us. + return NS_WARN_IF(Destroyed()) ? NS_ERROR_EDITOR_DESTROYED : NS_OK; +} + +already_AddRefed<Element> TextEditor::GetInputEventTargetElement() const { + RefPtr<Element> target = Element::FromEventTargetOrNull(mEventTarget); + return target.forget(); +} + +bool TextEditor::IsEmpty() const { + // Even if there is no padding <br> element for empty editor, we should be + // detected as empty editor if all the children are text nodes and these + // have no content. + Element* anonymousDivElement = GetRoot(); + if (!anonymousDivElement) { + return true; // Don't warn it, this is possible, e.g., 997805.html + } + + MOZ_ASSERT(anonymousDivElement->GetFirstChild() && + anonymousDivElement->GetFirstChild()->IsText()); + + // Only when there is non-empty text node, we are not empty. + return !anonymousDivElement->GetFirstChild()->Length(); +} + +NS_IMETHODIMP TextEditor::GetTextLength(uint32_t* aCount) { + MOZ_ASSERT(aCount); + + // initialize out params + *aCount = 0; + + // special-case for empty document, to account for the padding <br> element + // for empty editor. + // XXX This should be overridden by `HTMLEditor` and we should return the + // first text node's length from `TextEditor` instead. The following + // code is too expensive. + if (IsEmpty()) { + return NS_OK; + } + + Element* rootElement = GetRoot(); + if (NS_WARN_IF(!rootElement)) { + return NS_ERROR_FAILURE; + } + + uint32_t totalLength = 0; + PostContentIterator postOrderIter; + DebugOnly<nsresult> rvIgnored = postOrderIter.Init(rootElement); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored), + "PostContentIterator::Init() failed, but ignored"); + EditorType editorType = GetEditorType(); + for (; !postOrderIter.IsDone(); postOrderIter.Next()) { + nsINode* currentNode = postOrderIter.GetCurrentNode(); + if (currentNode && currentNode->IsText() && + EditorUtils::IsEditableContent(*currentNode->AsText(), editorType)) { + totalLength += currentNode->Length(); + } + } + + *aCount = totalLength; + return NS_OK; +} + +bool TextEditor::IsCopyToClipboardAllowedInternal() const { + MOZ_ASSERT(IsEditActionDataAvailable()); + if (!EditorBase::IsCopyToClipboardAllowedInternal()) { + return false; + } + + if (!IsSingleLineEditor() || !IsPasswordEditor() || + NS_WARN_IF(!mPasswordMaskData)) { + return true; + } + + // If we're a password editor, we should allow selected text to be copied + // to the clipboard only when selection range is in unmasked range. + if (IsAllMasked() || IsMaskingPassword() || !UnmaskedLength()) { + return false; + } + + // If there are 2 or more ranges, we don't allow to copy/cut for now since + // we need to check whether all ranges are in unmasked range or not. + // Anyway, such operation in password field does not make sense. + if (SelectionRef().RangeCount() > 1) { + return false; + } + + uint32_t selectionStart = 0, selectionEnd = 0; + nsContentUtils::GetSelectionInTextControl(&SelectionRef(), mRootElement, + selectionStart, selectionEnd); + return UnmaskedStart() <= selectionStart && UnmaskedEnd() >= selectionEnd; +} + +nsresult TextEditor::HandlePasteAsQuotation( + AutoEditActionDataSetter& aEditActionData, int32_t aClipboardType) { + MOZ_ASSERT(aClipboardType == nsIClipboard::kGlobalClipboard || + aClipboardType == nsIClipboard::kSelectionClipboard); + if (NS_WARN_IF(!GetDocument())) { + return NS_OK; + } + + // 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; + } + + // XXX Why don't we dispatch ePaste event here? + + // Get the nsITransferable interface for getting the data from the clipboard + Result<nsCOMPtr<nsITransferable>, nsresult> maybeTransferable = + EditorUtils::CreateTransferableForPlainText(*GetDocument()); + if (maybeTransferable.isErr()) { + NS_WARNING("EditorUtils::CreateTransferableForPlainText() failed"); + return maybeTransferable.unwrapErr(); + } + nsCOMPtr<nsITransferable> trans(maybeTransferable.unwrap()); + if (!trans) { + NS_WARNING( + "EditorUtils::CreateTransferableForPlainText() returned nullptr, but " + "ignored"); + return NS_OK; + } + + // Get the Data from the clipboard + clipboard->GetData(trans, aClipboardType); + + // 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 = trans->GetAnyTransferData(flavor, getter_AddRefs(genericDataObj)); + if (NS_FAILED(rv)) { + NS_WARNING("nsITransferable::GetAnyTransferData() failed"); + return rv; + } + + if (!flavor.EqualsLiteral(kTextMime) && + !flavor.EqualsLiteral(kMozTextInternal)) { + return NS_OK; + } + + nsCOMPtr<nsISupportsString> text = do_QueryInterface(genericDataObj); + if (!text) { + return NS_OK; + } + + nsString stuffToPaste; + DebugOnly<nsresult> rvIgnored = text->GetData(stuffToPaste); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored), + "nsISupportsString::GetData() failed, but ignored"); + if (stuffToPaste.IsEmpty()) { + return NS_OK; + } + + aEditActionData.SetData(stuffToPaste); + if (!stuffToPaste.IsEmpty()) { + nsContentUtils::PlatformToDOMLineBreaks(stuffToPaste); + } + rv = aEditActionData.MaybeDispatchBeforeInputEvent(); + if (NS_FAILED(rv)) { + NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED, + "MaybeDispatchBeforeInputEvent() failed"); + return rv; + } + + AutoPlaceholderBatch treatAsOneTransaction( + *this, ScrollSelectionIntoView::Yes, __FUNCTION__); + rv = InsertWithQuotationsAsSubAction(stuffToPaste); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), + "TextEditor::InsertWithQuotationsAsSubAction() failed"); + return rv; +} + +nsresult TextEditor::InsertWithQuotationsAsSubAction( + const nsAString& aQuotedText) { + MOZ_ASSERT(IsEditActionDataAvailable()); + + if (IsReadonly()) { + return NS_OK; + } + + // 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() != char16_t('\n'))) { + quotedStuff.Append(char16_t('\n')); + } + + 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(), + "TextEditor::OnStartToHandleTopLevelEditSubAction() failed, but ignored"); + + // XXX Do we need to support paste-as-quotation in password editor (and + // also in single line editor)? + MaybeDoAutoPasswordMasking(); + + nsresult rv = InsertTextAsSubAction(quotedStuff, SelectionHandling::Delete); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), + "EditorBase::InsertTextAsSubAction() failed"); + return rv; +} + +nsresult TextEditor::SelectEntireDocument() { + MOZ_ASSERT(IsEditActionDataAvailable()); + + if (NS_WARN_IF(!mInitSucceeded)) { + return NS_ERROR_NOT_INITIALIZED; + } + + RefPtr<Element> anonymousDivElement = GetRoot(); + if (NS_WARN_IF(!anonymousDivElement)) { + return NS_ERROR_NOT_INITIALIZED; + } + + RefPtr<Text> text = + Text::FromNodeOrNull(anonymousDivElement->GetFirstChild()); + MOZ_ASSERT(text); + + MOZ_TRY(SelectionRef().SetStartAndEndInLimiter( + *text, 0, *text, text->TextDataLength(), eDirNext, + nsISelectionListener::SELECTALL_REASON)); + + return NS_OK; +} + +EventTarget* TextEditor::GetDOMEventTarget() const { return mEventTarget; } + +void TextEditor::ReinitializeSelection(Element& aElement) { + if (NS_WARN_IF(Destroyed())) { + return; + } + + AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing); + if (NS_WARN_IF(!editActionData.CanHandle())) { + return; + } + + // We don't need to flush pending notifications here and we don't need to + // handle spellcheck at first focus. Therefore, we don't need to call + // `TextEditor::OnFocus` here. + EditorBase::OnFocus(aElement); + + // If previous focused editor turn on spellcheck and this editor doesn't + // turn on it, spellcheck state is mismatched. So we need to re-sync it. + SyncRealTimeSpell(); +} + +nsresult TextEditor::OnFocus(const nsINode& aOriginalEventTargetNode) { + RefPtr<PresShell> presShell = GetPresShell(); + if (NS_WARN_IF(!presShell)) { + return NS_ERROR_FAILURE; + } + // Let's update the layout information right now because there are some + // pending notifications and flushing them may cause destroying the editor. + presShell->FlushPendingNotifications(FlushType::Layout); + if (MOZ_UNLIKELY(!CanKeepHandlingFocusEvent(aOriginalEventTargetNode))) { + return NS_OK; + } + + AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing); + if (NS_WARN_IF(!editActionData.CanHandle())) { + return NS_ERROR_FAILURE; + } + + // Spell check a textarea the first time that it is focused. + nsresult rv = FlushPendingSpellCheck(); + if (MOZ_UNLIKELY(rv == NS_ERROR_EDITOR_DESTROYED)) { + NS_WARNING("EditorBase::FlushPendingSpellCheck() failed"); + return NS_ERROR_EDITOR_DESTROYED; + } + NS_WARNING_ASSERTION( + NS_SUCCEEDED(rv), + "EditorBase::FlushPendingSpellCheck() failed, but ignored"); + if (MOZ_UNLIKELY(!CanKeepHandlingFocusEvent(aOriginalEventTargetNode))) { + return NS_OK; + } + + return EditorBase::OnFocus(aOriginalEventTargetNode); +} + +nsresult TextEditor::OnBlur(const EventTarget* aEventTarget) { + // check if something else is focused. If another element is focused, then + // we should not change the selection. + nsFocusManager* focusManager = nsFocusManager::GetFocusManager(); + if (MOZ_UNLIKELY(!focusManager)) { + return NS_OK; + } + + // If another element already has focus, we should not maintain the selection + // because we may not have the rights doing it. + if (focusManager->GetFocusedElement()) { + return NS_OK; + } + + nsresult rv = FinalizeSelection(); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), + "EditorBase::FinalizeSelection() failed"); + return rv; +} + +nsresult TextEditor::SetAttributeOrEquivalent(Element* aElement, + nsAtom* aAttribute, + const nsAString& aValue, + bool aSuppressTransaction) { + if (NS_WARN_IF(!aElement) || NS_WARN_IF(!aAttribute)) { + return NS_ERROR_INVALID_ARG; + } + + AutoEditActionDataSetter editActionData(*this, EditAction::eSetAttribute); + nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent(); + if (NS_FAILED(rv)) { + NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED, + "CanHandleAndMaybeDispatchBeforeInputEvent() failed"); + return EditorBase::ToGenericNSResult(rv); + } + + rv = SetAttributeWithTransaction(*aElement, *aAttribute, aValue); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), + "EditorBase::SetAttributeWithTransaction() failed"); + return EditorBase::ToGenericNSResult(rv); +} + +nsresult TextEditor::RemoveAttributeOrEquivalent(Element* aElement, + nsAtom* aAttribute, + bool aSuppressTransaction) { + if (NS_WARN_IF(!aElement) || NS_WARN_IF(!aAttribute)) { + return NS_ERROR_INVALID_ARG; + } + + AutoEditActionDataSetter editActionData(*this, EditAction::eRemoveAttribute); + nsresult rv = editActionData.CanHandleAndMaybeDispatchBeforeInputEvent(); + if (NS_FAILED(rv)) { + NS_WARNING_ASSERTION(rv == NS_ERROR_EDITOR_ACTION_CANCELED, + "CanHandleAndMaybeDispatchBeforeInputEvent() failed"); + return EditorBase::ToGenericNSResult(rv); + } + + rv = RemoveAttributeWithTransaction(*aElement, *aAttribute); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), + "EditorBase::RemoveAttributeWithTransaction() failed"); + return EditorBase::ToGenericNSResult(rv); +} + +// static +void TextEditor::MaskString(nsString& aString, const Text& aTextNode, + uint32_t aStartOffsetInString, + uint32_t aStartOffsetInText) { + MOZ_ASSERT(aTextNode.HasFlag(NS_MAYBE_MASKED)); + MOZ_ASSERT(aStartOffsetInString == 0 || aStartOffsetInText == 0); + + uint32_t unmaskStart = UINT32_MAX, unmaskLength = 0; + TextEditor* textEditor = + nsContentUtils::GetTextEditorFromAnonymousNodeWithoutCreation(&aTextNode); + if (textEditor && textEditor->UnmaskedLength() > 0) { + unmaskStart = textEditor->UnmaskedStart(); + unmaskLength = textEditor->UnmaskedLength(); + // If text is copied from after unmasked range, we can treat this case + // as mask all. + if (aStartOffsetInText >= unmaskStart + unmaskLength) { + unmaskLength = 0; + unmaskStart = UINT32_MAX; + } else { + // If text is copied from middle of unmasked range, reduce the length + // and adjust start offset. + if (aStartOffsetInText > unmaskStart) { + unmaskLength = unmaskStart + unmaskLength - aStartOffsetInText; + unmaskStart = 0; + } + // If text is copied from before start of unmasked range, just adjust + // the start offset. + else { + unmaskStart -= aStartOffsetInText; + } + // Make the range is in the string. + unmaskStart += aStartOffsetInString; + } + } + + const char16_t kPasswordMask = TextEditor::PasswordMask(); + for (uint32_t i = aStartOffsetInString; i < aString.Length(); ++i) { + bool isSurrogatePair = NS_IS_HIGH_SURROGATE(aString.CharAt(i)) && + i < aString.Length() - 1 && + NS_IS_LOW_SURROGATE(aString.CharAt(i + 1)); + if (i < unmaskStart || i >= unmaskStart + unmaskLength) { + if (isSurrogatePair) { + aString.SetCharAt(kPasswordMask, i); + aString.SetCharAt(kPasswordMask, i + 1); + } else { + aString.SetCharAt(kPasswordMask, i); + } + } + + // Skip the following low surrogate. + if (isSurrogatePair) { + ++i; + } + } +} + +nsresult TextEditor::SetUnmaskRangeInternal(uint32_t aStart, uint32_t aLength, + uint32_t aTimeout, bool aNotify, + bool aForceStartMasking) { + if (mPasswordMaskData) { + mPasswordMaskData->mIsMaskingPassword = aForceStartMasking || aTimeout != 0; + + // We cannot manage multiple unmasked ranges so that shrink the previous + // range first. + if (!IsAllMasked()) { + mPasswordMaskData->mUnmaskedLength = 0; + mPasswordMaskData->CancelTimer(PasswordMaskData::ReleaseTimer::No); + } + } + + // If we're not a password editor, return error since this call does not + // make sense. + if (!IsPasswordEditor() || NS_WARN_IF(!mPasswordMaskData)) { + mPasswordMaskData->CancelTimer(PasswordMaskData::ReleaseTimer::Yes); + return NS_ERROR_NOT_AVAILABLE; + } + + Element* rootElement = GetRoot(); + if (NS_WARN_IF(!rootElement)) { + return NS_ERROR_NOT_INITIALIZED; + } + Text* text = Text::FromNodeOrNull(rootElement->GetFirstChild()); + if (!text || !text->Length()) { + // There is no anonymous text node in the editor. + return aStart > 0 && aStart != UINT32_MAX ? NS_ERROR_INVALID_ARG : NS_OK; + } + + if (aStart < UINT32_MAX) { + uint32_t valueLength = text->Length(); + if (aStart >= valueLength) { + return NS_ERROR_INVALID_ARG; // There is no character can be masked. + } + // If aStart is middle of a surrogate pair, expand it to include the + // preceding high surrogate because the caller may want to show a + // character before the character at `aStart + 1`. + const nsTextFragment* textFragment = text->GetText(); + if (textFragment->IsLowSurrogateFollowingHighSurrogateAt(aStart)) { + mPasswordMaskData->mUnmaskedStart = aStart - 1; + // If caller collapses the range, keep it. Otherwise, expand the length. + if (aLength > 0) { + ++aLength; + } + } else { + mPasswordMaskData->mUnmaskedStart = aStart; + } + mPasswordMaskData->mUnmaskedLength = + std::min(valueLength - UnmaskedStart(), aLength); + // If unmasked end is middle of a surrogate pair, expand it to include + // the following low surrogate because the caller may want to show a + // character after the character at `aStart + aLength`. + if (UnmaskedEnd() < valueLength && + textFragment->IsLowSurrogateFollowingHighSurrogateAt(UnmaskedEnd())) { + mPasswordMaskData->mUnmaskedLength++; + } + // If it's first time to mask the unmasking characters with timer, create + // the timer now. Then, we'll keep using it for saving the creation cost. + if (!HasAutoMaskingTimer() && aLength && aTimeout && UnmaskedLength()) { + mPasswordMaskData->mTimer = NS_NewTimer(); + } + } else { + if (NS_WARN_IF(aLength != 0)) { + return NS_ERROR_INVALID_ARG; + } + mPasswordMaskData->MaskAll(); + } + + // Notify nsTextFrame of this update if the caller wants this to do it. + // Only in this case, script may run. + if (aNotify) { + MOZ_ASSERT(IsEditActionDataAvailable()); + + RefPtr<Document> document = GetDocument(); + if (NS_WARN_IF(!document)) { + return NS_ERROR_NOT_INITIALIZED; + } + // Notify nsTextFrame of masking range change. + if (RefPtr<PresShell> presShell = document->GetObservingPresShell()) { + nsAutoScriptBlocker blockRunningScript; + uint32_t valueLength = text->Length(); + CharacterDataChangeInfo changeInfo = {false, 0, valueLength, valueLength, + nullptr}; + presShell->CharacterDataChanged(text, changeInfo); + } + + // Scroll caret into the view since masking or unmasking character may + // move caret to outside of the view. + nsresult rv = ScrollSelectionFocusIntoView(); + if (NS_FAILED(rv)) { + NS_WARNING("EditorBase::ScrollSelectionFocusIntoView() failed"); + return rv; + } + } + + if (!IsAllMasked() && aTimeout != 0) { + // Initialize the timer to mask the range automatically. + MOZ_ASSERT(HasAutoMaskingTimer()); + DebugOnly<nsresult> rvIgnored = mPasswordMaskData->mTimer->InitWithCallback( + this, aTimeout, nsITimer::TYPE_ONE_SHOT); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored), + "nsITimer::InitWithCallback() failed, but ignored"); + } + + return NS_OK; +} + +// static +char16_t TextEditor::PasswordMask() { + char16_t ret = LookAndFeel::GetPasswordCharacter(); + if (!ret) { + ret = '*'; + } + return ret; +} + +MOZ_CAN_RUN_SCRIPT_BOUNDARY NS_IMETHODIMP TextEditor::Notify(nsITimer* aTimer) { + // Check whether our text editor's password flag was changed before this + // "hide password character" timer actually fires. + if (!IsPasswordEditor() || NS_WARN_IF(!mPasswordMaskData)) { + return NS_OK; + } + + if (IsAllMasked()) { + return NS_OK; + } + + AutoEditActionDataSetter editActionData(*this, EditAction::eHidePassword); + if (NS_WARN_IF(!editActionData.CanHandle())) { + return NS_ERROR_NOT_INITIALIZED; + } + + // Mask all characters. + nsresult rv = MaskAllCharactersAndNotify(); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), + "TextEditor::MaskAllCharactersAndNotify() failed"); + + if (StaticPrefs::editor_password_testing_mask_delay()) { + if (RefPtr<Element> target = GetInputEventTargetElement()) { + RefPtr<Document> document = target->OwnerDoc(); + DebugOnly<nsresult> rvIgnored = nsContentUtils::DispatchTrustedEvent( + document, target, u"MozLastInputMasked"_ns, CanBubble::eYes, + Cancelable::eNo); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored), + "nsContentUtils::DispatchTrustedEvent(" + "MozLastInputMasked) failed, but ignored"); + } + } + + return EditorBase::ToGenericNSResult(rv); +} + +NS_IMETHODIMP TextEditor::GetName(nsACString& aName) { + aName.AssignLiteral("TextEditor"); + return NS_OK; +} + +void TextEditor::WillDeleteText(uint32_t aCurrentLength, + uint32_t aRemoveStartOffset, + uint32_t aRemoveLength) { + MOZ_ASSERT(IsEditActionDataAvailable()); + + if (!IsPasswordEditor() || NS_WARN_IF(!mPasswordMaskData) || IsAllMasked()) { + return; + } + + // Adjust unmasked range before deletion since DOM mutation may cause + // layout referring the range in old text. + + // If we need to mask automatically, mask all now. + if (IsMaskingPassword()) { + DebugOnly<nsresult> rvIgnored = MaskAllCharacters(); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored), + "TextEditor::MaskAllCharacters() failed, but ignored"); + return; + } + + if (aRemoveStartOffset < UnmaskedStart()) { + // If removing range is before the unmasked range, move it. + if (aRemoveStartOffset + aRemoveLength <= UnmaskedStart()) { + DebugOnly<nsresult> rvIgnored = + SetUnmaskRange(UnmaskedStart() - aRemoveLength, UnmaskedLength()); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored), + "TextEditor::SetUnmaskRange() failed, but ignored"); + return; + } + + // If removing range starts before unmasked range, and ends in unmasked + // range, move and shrink the range. + if (aRemoveStartOffset + aRemoveLength < UnmaskedEnd()) { + uint32_t unmaskedLengthInRemovingRange = + aRemoveStartOffset + aRemoveLength - UnmaskedStart(); + DebugOnly<nsresult> rvIgnored = SetUnmaskRange( + aRemoveStartOffset, UnmaskedLength() - unmaskedLengthInRemovingRange); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored), + "TextEditor::SetUnmaskRange() failed, but ignored"); + return; + } + + // If removing range includes all unmasked range, collapse it to the + // remove offset. + DebugOnly<nsresult> rvIgnored = SetUnmaskRange(aRemoveStartOffset, 0); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored), + "TextEditor::SetUnmaskRange() failed, but ignored"); + return; + } + + if (aRemoveStartOffset < UnmaskedEnd()) { + // If removing range is in unmasked range, shrink the range. + if (aRemoveStartOffset + aRemoveLength <= UnmaskedEnd()) { + DebugOnly<nsresult> rvIgnored = + SetUnmaskRange(UnmaskedStart(), UnmaskedLength() - aRemoveLength); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored), + "TextEditor::SetUnmaskRange() failed, but ignored"); + return; + } + + // If removing range starts from unmasked range, and ends after it, + // shrink it. + DebugOnly<nsresult> rvIgnored = + SetUnmaskRange(UnmaskedStart(), aRemoveStartOffset - UnmaskedStart()); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rvIgnored), + "TextEditor::SetUnmaskRange() failed, but ignored"); + return; + } + + // If removing range is after the unmasked range, keep it. +} + +nsresult TextEditor::DidInsertText(uint32_t aNewLength, + uint32_t aInsertedOffset, + uint32_t aInsertedLength) { + MOZ_ASSERT(IsEditActionDataAvailable()); + + if (!IsPasswordEditor() || NS_WARN_IF(!mPasswordMaskData) || IsAllMasked()) { + return NS_OK; + } + + if (IsMaskingPassword()) { + // If we need to mask password, mask all right now. + nsresult rv = MaskAllCharactersAndNotify(); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), + "TextEditor::MaskAllCharacters() failed"); + return rv; + } + + if (aInsertedOffset < UnmaskedStart()) { + // If insertion point is before unmasked range, expand the unmasked range + // to include the new text. + nsresult rv = SetUnmaskRangeAndNotify( + aInsertedOffset, UnmaskedEnd() + aInsertedLength - aInsertedOffset); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), + "TextEditor::SetUnmaskRangeAndNotify() failed"); + return rv; + } + + if (aInsertedOffset <= UnmaskedEnd()) { + // If insertion point is in unmasked range, unmask new text. + nsresult rv = SetUnmaskRangeAndNotify(UnmaskedStart(), + UnmaskedLength() + aInsertedLength); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), + "TextEditor::SetUnmaskRangeAndNotify() failed"); + return rv; + } + + // If insertion point is after unmasked range, extend the unmask range to + // include the new text. + nsresult rv = SetUnmaskRangeAndNotify( + UnmaskedStart(), aInsertedOffset + aInsertedLength - UnmaskedStart()); + NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), + "TextEditor::SetUnmaskRangeAndNotify() failed"); + return rv; +} + +} // namespace mozilla |