The Tor Browser / file comparison
comparison: editor/libeditor/base/InsertElementTxn.cpp
editor/libeditor/base/InsertElementTxn.cpp
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
equal
deleted
inserted
replaced
| -1:000000000000 | 0:fedcc7d3bc14 |
|---|---|
| 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 <stdio.h> // for printf | |
| 7 | |
| 8 #include "InsertElementTxn.h" | |
| 9 #include "nsAString.h" | |
| 10 #include "nsDebug.h" // for NS_ENSURE_TRUE, etc | |
| 11 #include "nsError.h" // for NS_ERROR_NULL_POINTER, etc | |
| 12 #include "nsIContent.h" // for nsIContent | |
| 13 #include "nsIEditor.h" // for nsIEditor | |
| 14 #include "nsINode.h" // for nsINode | |
| 15 #include "nsISelection.h" // for nsISelection | |
| 16 #include "nsMemory.h" // for nsMemory | |
| 17 #include "nsReadableUtils.h" // for ToNewCString | |
| 18 #include "nsString.h" // for nsString | |
| 19 | |
| 20 InsertElementTxn::InsertElementTxn() | |
| 21 : EditTxn() | |
| 22 { | |
| 23 } | |
| 24 | |
| 25 NS_IMPL_CYCLE_COLLECTION_INHERITED(InsertElementTxn, EditTxn, | |
| 26 mNode, | |
| 27 mParent) | |
| 28 | |
| 29 NS_IMPL_ADDREF_INHERITED(InsertElementTxn, EditTxn) | |
| 30 NS_IMPL_RELEASE_INHERITED(InsertElementTxn, EditTxn) | |
| 31 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(InsertElementTxn) | |
| 32 NS_INTERFACE_MAP_END_INHERITING(EditTxn) | |
| 33 | |
| 34 NS_IMETHODIMP InsertElementTxn::Init(nsIDOMNode *aNode, | |
| 35 nsIDOMNode *aParent, | |
| 36 int32_t aOffset, | |
| 37 nsIEditor *aEditor) | |
| 38 { | |
| 39 NS_ASSERTION(aNode && aParent && aEditor, "bad arg"); | |
| 40 NS_ENSURE_TRUE(aNode && aParent && aEditor, NS_ERROR_NULL_POINTER); | |
| 41 | |
| 42 mNode = do_QueryInterface(aNode); | |
| 43 mParent = do_QueryInterface(aParent); | |
| 44 mOffset = aOffset; | |
| 45 mEditor = aEditor; | |
| 46 NS_ENSURE_TRUE(mNode && mParent && mEditor, NS_ERROR_INVALID_ARG); | |
| 47 return NS_OK; | |
| 48 } | |
| 49 | |
| 50 | |
| 51 NS_IMETHODIMP InsertElementTxn::DoTransaction(void) | |
| 52 { | |
| 53 NS_ENSURE_TRUE(mNode && mParent, NS_ERROR_NOT_INITIALIZED); | |
| 54 | |
| 55 nsCOMPtr<nsINode> parent = do_QueryInterface(mParent); | |
| 56 NS_ENSURE_STATE(parent); | |
| 57 | |
| 58 uint32_t count = parent->GetChildCount(); | |
| 59 if (mOffset > int32_t(count) || mOffset == -1) { | |
| 60 // -1 is sentinel value meaning "append at end" | |
| 61 mOffset = count; | |
| 62 } | |
| 63 | |
| 64 nsCOMPtr<nsIContent> refContent = parent->GetChildAt(mOffset); | |
| 65 // note, it's ok for refNode to be null. that means append | |
| 66 nsCOMPtr<nsIDOMNode> refNode = refContent ? refContent->AsDOMNode() : nullptr; | |
| 67 | |
| 68 mEditor->MarkNodeDirty(mNode); | |
| 69 | |
| 70 nsCOMPtr<nsIDOMNode> resultNode; | |
| 71 nsresult result = mParent->InsertBefore(mNode, refNode, getter_AddRefs(resultNode)); | |
| 72 NS_ENSURE_SUCCESS(result, result); | |
| 73 NS_ENSURE_TRUE(resultNode, NS_ERROR_NULL_POINTER); | |
| 74 | |
| 75 // only set selection to insertion point if editor gives permission | |
| 76 bool bAdjustSelection; | |
| 77 mEditor->ShouldTxnSetSelection(&bAdjustSelection); | |
| 78 if (bAdjustSelection) | |
| 79 { | |
| 80 nsCOMPtr<nsISelection> selection; | |
| 81 result = mEditor->GetSelection(getter_AddRefs(selection)); | |
| 82 NS_ENSURE_SUCCESS(result, result); | |
| 83 NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER); | |
| 84 // place the selection just after the inserted element | |
| 85 selection->Collapse(mParent, mOffset+1); | |
| 86 } | |
| 87 else | |
| 88 { | |
| 89 // do nothing - dom range gravity will adjust selection | |
| 90 } | |
| 91 return result; | |
| 92 } | |
| 93 | |
| 94 NS_IMETHODIMP InsertElementTxn::UndoTransaction(void) | |
| 95 { | |
| 96 NS_ENSURE_TRUE(mNode && mParent, NS_ERROR_NOT_INITIALIZED); | |
| 97 | |
| 98 nsCOMPtr<nsIDOMNode> resultNode; | |
| 99 return mParent->RemoveChild(mNode, getter_AddRefs(resultNode)); | |
| 100 } | |
| 101 | |
| 102 NS_IMETHODIMP InsertElementTxn::GetTxnDescription(nsAString& aString) | |
| 103 { | |
| 104 aString.AssignLiteral("InsertElementTxn"); | |
| 105 return NS_OK; | |
| 106 } |
