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85 lines
2.7 KiB
C++
85 lines
2.7 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 "nsAutoPtr.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 "nsIDOMNode.h"
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#include "nsIEditor.h"
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#include "nsIPresShell.h"
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#include "nsISelection.h"
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#include "nsISelectionPrivate.h"
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#include "nsISupportsImpl.h"
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#include "nsPlaintextEditor.h"
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#include "nsPresContext.h"
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#include "nsTextEditRules.h"
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#include "nscore.h"
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// Test for distance between caret and text that will be deleted
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nsresult
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nsTextEditRules::CheckBidiLevelForDeletion(nsISelection *aSelection,
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nsIDOMNode *aSelNode,
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int32_t aSelOffset,
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nsIEditor::EDirection aAction,
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bool *aCancel)
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{
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NS_ENSURE_ARG_POINTER(aCancel);
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*aCancel = false;
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nsCOMPtr<nsIPresShell> shell = mEditor->GetPresShell();
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NS_ENSURE_TRUE(shell, NS_ERROR_NOT_INITIALIZED);
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nsPresContext *context = shell->GetPresContext();
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NS_ENSURE_TRUE(context, NS_ERROR_NULL_POINTER);
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if (!context->BidiEnabled())
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return NS_OK;
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nsCOMPtr<nsIContent> content = do_QueryInterface(aSelNode);
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NS_ENSURE_TRUE(content, NS_ERROR_NULL_POINTER);
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uint8_t levelBefore;
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uint8_t levelAfter;
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nsCOMPtr<nsISelectionPrivate> privateSelection(do_QueryInterface(aSelection));
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NS_ENSURE_TRUE(privateSelection, NS_ERROR_NULL_POINTER);
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nsRefPtr<nsFrameSelection> frameSelection;
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privateSelection->GetFrameSelection(getter_AddRefs(frameSelection));
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NS_ENSURE_TRUE(frameSelection, NS_ERROR_NULL_POINTER);
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nsPrevNextBidiLevels levels = frameSelection->
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GetPrevNextBidiLevels(content, aSelOffset, true);
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levelBefore = levels.mLevelBefore;
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levelAfter = levels.mLevelAfter;
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uint8_t currentCaretLevel = frameSelection->GetCaretBidiLevel();
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uint8_t levelOfDeletion;
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levelOfDeletion =
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(nsIEditor::eNext==aAction || nsIEditor::eNextWord==aAction) ?
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levelAfter : levelBefore;
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if (currentCaretLevel == levelOfDeletion)
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; // perform the deletion
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else
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{
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if (mDeleteBidiImmediately || levelBefore == levelAfter)
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; // perform the deletion
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else
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*aCancel = true;
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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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}
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return NS_OK;
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}
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