зеркало из https://github.com/mozilla/gecko-dev.git
102 строки
2.9 KiB
C++
102 строки
2.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/TextEditRules.h"
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#include "mozilla/TextEditor.h"
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#include "mozilla/dom/Selection.h"
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#include "nsCOMPtr.h"
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#include "nsDebug.h"
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#include "nsError.h"
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#include "nsFrameSelection.h"
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#include "nsIContent.h"
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#include "nsIEditor.h"
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#include "nsISupportsImpl.h"
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#include "nsPresContext.h"
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#include "nscore.h"
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namespace mozilla {
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using namespace dom;
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// Test for distance between caret and text that will be deleted
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nsresult TextEditRules::CheckBidiLevelForDeletion(
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const EditorRawDOMPoint& aSelectionPoint, nsIEditor::EDirection aAction,
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bool* aCancel) {
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MOZ_ASSERT(IsEditorDataAvailable());
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if (NS_WARN_IF(!aCancel)) {
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return NS_ERROR_INVALID_ARG;
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}
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*aCancel = false;
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RefPtr<nsPresContext> presContext = TextEditorRef().GetPresContext();
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if (NS_WARN_IF(!presContext)) {
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return NS_ERROR_FAILURE;
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}
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if (!presContext->BidiEnabled()) {
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return NS_OK;
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}
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if (!aSelectionPoint.GetContainerAsContent()) {
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return NS_ERROR_FAILURE;
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}
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RefPtr<nsFrameSelection> frameSelection =
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SelectionRefPtr()->GetFrameSelection();
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if (NS_WARN_IF(!frameSelection)) {
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return NS_ERROR_FAILURE;
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}
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nsPrevNextBidiLevels levels = frameSelection->GetPrevNextBidiLevels(
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aSelectionPoint.GetContainerAsContent(), aSelectionPoint.Offset(), true);
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nsBidiLevel levelBefore = levels.mLevelBefore;
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nsBidiLevel levelAfter = levels.mLevelAfter;
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nsBidiLevel currentCaretLevel = frameSelection->GetCaretBidiLevel();
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nsBidiLevel levelOfDeletion;
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levelOfDeletion =
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(nsIEditor::eNext == aAction || nsIEditor::eNextWord == aAction)
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? levelAfter
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: levelBefore;
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if (currentCaretLevel == levelOfDeletion) {
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return NS_OK; // perform the deletion
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}
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if (!mDeleteBidiImmediately && levelBefore != levelAfter) {
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*aCancel = true;
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}
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// Set the bidi level of the caret to that of the
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// character that will be (or would have been) deleted
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frameSelection->SetCaretBidiLevel(levelOfDeletion);
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return NS_OK;
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}
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void TextEditRules::UndefineCaretBidiLevel() {
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MOZ_ASSERT(IsEditorDataAvailable());
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/**
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* After inserting text the caret Bidi level must be set to the level of the
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* inserted text.This is difficult, because we cannot know what the level is
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* until after the Bidi algorithm is applied to the whole paragraph.
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*
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* So we set the caret Bidi level to UNDEFINED here, and the caret code will
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* set it correctly later
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*/
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RefPtr<nsFrameSelection> frameSelection =
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SelectionRefPtr()->GetFrameSelection();
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if (frameSelection) {
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frameSelection->UndefineCaretBidiLevel();
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}
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}
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} // namespace mozilla
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