editor/libeditor/text/nsTextEditRulesBidi.cpp@6474c204b198 (annotated)
editor/libeditor/text/nsTextEditRulesBidi.cpp
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | #include "nsAutoPtr.h" |
| michael@0 | 7 | #include "nsCOMPtr.h" |
| michael@0 | 8 | #include "nsDebug.h" |
| michael@0 | 9 | #include "nsError.h" |
| michael@0 | 10 | #include "nsFrameSelection.h" |
| michael@0 | 11 | #include "nsIContent.h" |
| michael@0 | 12 | #include "nsIDOMNode.h" |
| michael@0 | 13 | #include "nsIEditor.h" |
| michael@0 | 14 | #include "nsIPresShell.h" |
| michael@0 | 15 | #include "mozilla/dom/Selection.h" |
| michael@0 | 16 | #include "nsISelectionPrivate.h" |
| michael@0 | 17 | #include "nsISupportsImpl.h" |
| michael@0 | 18 | #include "nsPlaintextEditor.h" |
| michael@0 | 19 | #include "nsPresContext.h" |
| michael@0 | 20 | #include "nsTextEditRules.h" |
| michael@0 | 21 | #include "nscore.h" |
| michael@0 | 22 | |
| michael@0 | 23 | using namespace mozilla; |
| michael@0 | 24 | using namespace mozilla::dom; |
| michael@0 | 25 | |
| michael@0 | 26 | // Test for distance between caret and text that will be deleted |
| michael@0 | 27 | nsresult |
| michael@0 | 28 | nsTextEditRules::CheckBidiLevelForDeletion(nsISelection *aSelection, |
| michael@0 | 29 | nsIDOMNode *aSelNode, |
| michael@0 | 30 | int32_t aSelOffset, |
| michael@0 | 31 | nsIEditor::EDirection aAction, |
| michael@0 | 32 | bool *aCancel) |
| michael@0 | 33 | { |
| michael@0 | 34 | NS_ENSURE_ARG_POINTER(aCancel); |
| michael@0 | 35 | *aCancel = false; |
| michael@0 | 36 | |
| michael@0 | 37 | nsCOMPtr<nsIPresShell> shell = mEditor->GetPresShell(); |
| michael@0 | 38 | NS_ENSURE_TRUE(shell, NS_ERROR_NOT_INITIALIZED); |
| michael@0 | 39 | |
| michael@0 | 40 | nsPresContext *context = shell->GetPresContext(); |
| michael@0 | 41 | NS_ENSURE_TRUE(context, NS_ERROR_NULL_POINTER); |
| michael@0 | 42 | |
| michael@0 | 43 | if (!context->BidiEnabled()) |
| michael@0 | 44 | return NS_OK; |
| michael@0 | 45 | |
| michael@0 | 46 | nsCOMPtr<nsIContent> content = do_QueryInterface(aSelNode); |
| michael@0 | 47 | NS_ENSURE_TRUE(content, NS_ERROR_NULL_POINTER); |
| michael@0 | 48 | |
| michael@0 | 49 | uint8_t levelBefore; |
| michael@0 | 50 | uint8_t levelAfter; |
| michael@0 | 51 | nsRefPtr<nsFrameSelection> frameSelection = |
| michael@0 | 52 | static_cast<Selection*>(aSelection)->GetFrameSelection(); |
| michael@0 | 53 | NS_ENSURE_TRUE(frameSelection, NS_ERROR_NULL_POINTER); |
| michael@0 | 54 | |
| michael@0 | 55 | nsPrevNextBidiLevels levels = frameSelection-> |
| michael@0 | 56 | GetPrevNextBidiLevels(content, aSelOffset, true); |
| michael@0 | 57 | |
| michael@0 | 58 | levelBefore = levels.mLevelBefore; |
| michael@0 | 59 | levelAfter = levels.mLevelAfter; |
| michael@0 | 60 | |
| michael@0 | 61 | uint8_t currentCaretLevel = frameSelection->GetCaretBidiLevel(); |
| michael@0 | 62 | |
| michael@0 | 63 | uint8_t levelOfDeletion; |
| michael@0 | 64 | levelOfDeletion = |
| michael@0 | 65 | (nsIEditor::eNext==aAction || nsIEditor::eNextWord==aAction) ? |
| michael@0 | 66 | levelAfter : levelBefore; |
| michael@0 | 67 | |
| michael@0 | 68 | if (currentCaretLevel == levelOfDeletion) |
| michael@0 | 69 | ; // perform the deletion |
| michael@0 | 70 | else |
| michael@0 | 71 | { |
| michael@0 | 72 | if (mDeleteBidiImmediately || levelBefore == levelAfter) |
| michael@0 | 73 | ; // perform the deletion |
| michael@0 | 74 | else |
| michael@0 | 75 | *aCancel = true; |
| michael@0 | 76 | |
| michael@0 | 77 | // Set the bidi level of the caret to that of the |
| michael@0 | 78 | // character that will be (or would have been) deleted |
| michael@0 | 79 | frameSelection->SetCaretBidiLevel(levelOfDeletion); |
| michael@0 | 80 | } |
| michael@0 | 81 | return NS_OK; |
| michael@0 | 82 | } |
| michael@0 | 83 |
