1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/editor/libeditor/text/nsTextEditRulesBidi.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,83 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "nsAutoPtr.h"
1.10 +#include "nsCOMPtr.h"
1.11 +#include "nsDebug.h"
1.12 +#include "nsError.h"
1.13 +#include "nsFrameSelection.h"
1.14 +#include "nsIContent.h"
1.15 +#include "nsIDOMNode.h"
1.16 +#include "nsIEditor.h"
1.17 +#include "nsIPresShell.h"
1.18 +#include "mozilla/dom/Selection.h"
1.19 +#include "nsISelectionPrivate.h"
1.20 +#include "nsISupportsImpl.h"
1.21 +#include "nsPlaintextEditor.h"
1.22 +#include "nsPresContext.h"
1.23 +#include "nsTextEditRules.h"
1.24 +#include "nscore.h"
1.25 +
1.26 +using namespace mozilla;
1.27 +using namespace mozilla::dom;
1.28 +
1.29 +// Test for distance between caret and text that will be deleted
1.30 +nsresult
1.31 +nsTextEditRules::CheckBidiLevelForDeletion(nsISelection *aSelection,
1.32 + nsIDOMNode *aSelNode,
1.33 + int32_t aSelOffset,
1.34 + nsIEditor::EDirection aAction,
1.35 + bool *aCancel)
1.36 +{
1.37 + NS_ENSURE_ARG_POINTER(aCancel);
1.38 + *aCancel = false;
1.39 +
1.40 + nsCOMPtr<nsIPresShell> shell = mEditor->GetPresShell();
1.41 + NS_ENSURE_TRUE(shell, NS_ERROR_NOT_INITIALIZED);
1.42 +
1.43 + nsPresContext *context = shell->GetPresContext();
1.44 + NS_ENSURE_TRUE(context, NS_ERROR_NULL_POINTER);
1.45 +
1.46 + if (!context->BidiEnabled())
1.47 + return NS_OK;
1.48 +
1.49 + nsCOMPtr<nsIContent> content = do_QueryInterface(aSelNode);
1.50 + NS_ENSURE_TRUE(content, NS_ERROR_NULL_POINTER);
1.51 +
1.52 + uint8_t levelBefore;
1.53 + uint8_t levelAfter;
1.54 + nsRefPtr<nsFrameSelection> frameSelection =
1.55 + static_cast<Selection*>(aSelection)->GetFrameSelection();
1.56 + NS_ENSURE_TRUE(frameSelection, NS_ERROR_NULL_POINTER);
1.57 +
1.58 + nsPrevNextBidiLevels levels = frameSelection->
1.59 + GetPrevNextBidiLevels(content, aSelOffset, true);
1.60 +
1.61 + levelBefore = levels.mLevelBefore;
1.62 + levelAfter = levels.mLevelAfter;
1.63 +
1.64 + uint8_t currentCaretLevel = frameSelection->GetCaretBidiLevel();
1.65 +
1.66 + uint8_t levelOfDeletion;
1.67 + levelOfDeletion =
1.68 + (nsIEditor::eNext==aAction || nsIEditor::eNextWord==aAction) ?
1.69 + levelAfter : levelBefore;
1.70 +
1.71 + if (currentCaretLevel == levelOfDeletion)
1.72 + ; // perform the deletion
1.73 + else
1.74 + {
1.75 + if (mDeleteBidiImmediately || levelBefore == levelAfter)
1.76 + ; // perform the deletion
1.77 + else
1.78 + *aCancel = true;
1.79 +
1.80 + // Set the bidi level of the caret to that of the
1.81 + // character that will be (or would have been) deleted
1.82 + frameSelection->SetCaretBidiLevel(levelOfDeletion);
1.83 + }
1.84 + return NS_OK;
1.85 +}
1.86 +
