The Tor Browser / file comparison
comparison: editor/libeditor/base/DeleteTextTxn.cpp
editor/libeditor/base/DeleteTextTxn.cpp
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
equal
deleted
inserted
replaced
| -1:000000000000 | 0:49b24cd9dc58 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #include "DeleteTextTxn.h" | |
| 7 #include "mozilla/Assertions.h" | |
| 8 #include "mozilla/dom/Selection.h" | |
| 9 #include "nsAutoPtr.h" | |
| 10 #include "nsDebug.h" | |
| 11 #include "nsEditor.h" | |
| 12 #include "nsError.h" | |
| 13 #include "nsIEditor.h" | |
| 14 #include "nsISelection.h" | |
| 15 #include "nsISupportsImpl.h" | |
| 16 #include "nsSelectionState.h" | |
| 17 #include "nsAString.h" | |
| 18 | |
| 19 using namespace mozilla; | |
| 20 using namespace mozilla::dom; | |
| 21 | |
| 22 DeleteTextTxn::DeleteTextTxn() : | |
| 23 EditTxn(), | |
| 24 mEditor(nullptr), | |
| 25 mCharData(), | |
| 26 mOffset(0), | |
| 27 mNumCharsToDelete(0), | |
| 28 mRangeUpdater(nullptr) | |
| 29 { | |
| 30 } | |
| 31 | |
| 32 NS_IMPL_CYCLE_COLLECTION_INHERITED(DeleteTextTxn, EditTxn, | |
| 33 mCharData) | |
| 34 | |
| 35 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(DeleteTextTxn) | |
| 36 NS_INTERFACE_MAP_END_INHERITING(EditTxn) | |
| 37 | |
| 38 NS_IMETHODIMP | |
| 39 DeleteTextTxn::Init(nsEditor* aEditor, | |
| 40 nsIDOMCharacterData* aCharData, | |
| 41 uint32_t aOffset, | |
| 42 uint32_t aNumCharsToDelete, | |
| 43 nsRangeUpdater* aRangeUpdater) | |
| 44 { | |
| 45 MOZ_ASSERT(aEditor && aCharData); | |
| 46 | |
| 47 mEditor = aEditor; | |
| 48 mCharData = aCharData; | |
| 49 | |
| 50 // do nothing if the node is read-only | |
| 51 if (!mEditor->IsModifiableNode(mCharData)) { | |
| 52 return NS_ERROR_FAILURE; | |
| 53 } | |
| 54 | |
| 55 mOffset = aOffset; | |
| 56 mNumCharsToDelete = aNumCharsToDelete; | |
| 57 #ifdef DEBUG | |
| 58 uint32_t length; | |
| 59 mCharData->GetLength(&length); | |
| 60 NS_ASSERTION(length >= aOffset + aNumCharsToDelete, | |
| 61 "Trying to delete more characters than in node"); | |
| 62 #endif | |
| 63 mDeletedText.Truncate(); | |
| 64 mRangeUpdater = aRangeUpdater; | |
| 65 return NS_OK; | |
| 66 } | |
| 67 | |
| 68 NS_IMETHODIMP | |
| 69 DeleteTextTxn::DoTransaction() | |
| 70 { | |
| 71 MOZ_ASSERT(mEditor && mCharData); | |
| 72 | |
| 73 // get the text that we're about to delete | |
| 74 nsresult res = mCharData->SubstringData(mOffset, mNumCharsToDelete, | |
| 75 mDeletedText); | |
| 76 MOZ_ASSERT(NS_SUCCEEDED(res)); | |
| 77 res = mCharData->DeleteData(mOffset, mNumCharsToDelete); | |
| 78 NS_ENSURE_SUCCESS(res, res); | |
| 79 | |
| 80 if (mRangeUpdater) { | |
| 81 mRangeUpdater->SelAdjDeleteText(mCharData, mOffset, mNumCharsToDelete); | |
| 82 } | |
| 83 | |
| 84 // only set selection to deletion point if editor gives permission | |
| 85 bool bAdjustSelection; | |
| 86 mEditor->ShouldTxnSetSelection(&bAdjustSelection); | |
| 87 if (bAdjustSelection) { | |
| 88 nsRefPtr<Selection> selection = mEditor->GetSelection(); | |
| 89 NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER); | |
| 90 res = selection->Collapse(mCharData, mOffset); | |
| 91 NS_ASSERTION(NS_SUCCEEDED(res), | |
| 92 "selection could not be collapsed after undo of deletetext."); | |
| 93 NS_ENSURE_SUCCESS(res, res); | |
| 94 } | |
| 95 // else do nothing - dom range gravity will adjust selection | |
| 96 return NS_OK; | |
| 97 } | |
| 98 | |
| 99 //XXX: we may want to store the selection state and restore it properly | |
| 100 // was it an insertion point or an extended selection? | |
| 101 NS_IMETHODIMP | |
| 102 DeleteTextTxn::UndoTransaction() | |
| 103 { | |
| 104 MOZ_ASSERT(mEditor && mCharData); | |
| 105 | |
| 106 return mCharData->InsertData(mOffset, mDeletedText); | |
| 107 } | |
| 108 | |
| 109 NS_IMETHODIMP | |
| 110 DeleteTextTxn::GetTxnDescription(nsAString& aString) | |
| 111 { | |
| 112 aString.AssignLiteral("DeleteTextTxn: "); | |
| 113 aString += mDeletedText; | |
| 114 return NS_OK; | |
| 115 } |
