editor/libeditor/base/InsertElementTxn.cpp@b8a032363ba2 (annotated)
editor/libeditor/base/InsertElementTxn.cpp
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| 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 <stdio.h> // for printf |
| michael@0 | 7 | |
| michael@0 | 8 | #include "InsertElementTxn.h" |
| michael@0 | 9 | #include "nsAString.h" |
| michael@0 | 10 | #include "nsDebug.h" // for NS_ENSURE_TRUE, etc |
| michael@0 | 11 | #include "nsError.h" // for NS_ERROR_NULL_POINTER, etc |
| michael@0 | 12 | #include "nsIContent.h" // for nsIContent |
| michael@0 | 13 | #include "nsIEditor.h" // for nsIEditor |
| michael@0 | 14 | #include "nsINode.h" // for nsINode |
| michael@0 | 15 | #include "nsISelection.h" // for nsISelection |
| michael@0 | 16 | #include "nsMemory.h" // for nsMemory |
| michael@0 | 17 | #include "nsReadableUtils.h" // for ToNewCString |
| michael@0 | 18 | #include "nsString.h" // for nsString |
| michael@0 | 19 | |
| michael@0 | 20 | InsertElementTxn::InsertElementTxn() |
| michael@0 | 21 | : EditTxn() |
| michael@0 | 22 | { |
| michael@0 | 23 | } |
| michael@0 | 24 | |
| michael@0 | 25 | NS_IMPL_CYCLE_COLLECTION_INHERITED(InsertElementTxn, EditTxn, |
| michael@0 | 26 | mNode, |
| michael@0 | 27 | mParent) |
| michael@0 | 28 | |
| michael@0 | 29 | NS_IMPL_ADDREF_INHERITED(InsertElementTxn, EditTxn) |
| michael@0 | 30 | NS_IMPL_RELEASE_INHERITED(InsertElementTxn, EditTxn) |
| michael@0 | 31 | NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(InsertElementTxn) |
| michael@0 | 32 | NS_INTERFACE_MAP_END_INHERITING(EditTxn) |
| michael@0 | 33 | |
| michael@0 | 34 | NS_IMETHODIMP InsertElementTxn::Init(nsIDOMNode *aNode, |
| michael@0 | 35 | nsIDOMNode *aParent, |
| michael@0 | 36 | int32_t aOffset, |
| michael@0 | 37 | nsIEditor *aEditor) |
| michael@0 | 38 | { |
| michael@0 | 39 | NS_ASSERTION(aNode && aParent && aEditor, "bad arg"); |
| michael@0 | 40 | NS_ENSURE_TRUE(aNode && aParent && aEditor, NS_ERROR_NULL_POINTER); |
| michael@0 | 41 | |
| michael@0 | 42 | mNode = do_QueryInterface(aNode); |
| michael@0 | 43 | mParent = do_QueryInterface(aParent); |
| michael@0 | 44 | mOffset = aOffset; |
| michael@0 | 45 | mEditor = aEditor; |
| michael@0 | 46 | NS_ENSURE_TRUE(mNode && mParent && mEditor, NS_ERROR_INVALID_ARG); |
| michael@0 | 47 | return NS_OK; |
| michael@0 | 48 | } |
| michael@0 | 49 | |
| michael@0 | 50 | |
| michael@0 | 51 | NS_IMETHODIMP InsertElementTxn::DoTransaction(void) |
| michael@0 | 52 | { |
| michael@0 | 53 | NS_ENSURE_TRUE(mNode && mParent, NS_ERROR_NOT_INITIALIZED); |
| michael@0 | 54 | |
| michael@0 | 55 | nsCOMPtr<nsINode> parent = do_QueryInterface(mParent); |
| michael@0 | 56 | NS_ENSURE_STATE(parent); |
| michael@0 | 57 | |
| michael@0 | 58 | uint32_t count = parent->GetChildCount(); |
| michael@0 | 59 | if (mOffset > int32_t(count) || mOffset == -1) { |
| michael@0 | 60 | // -1 is sentinel value meaning "append at end" |
| michael@0 | 61 | mOffset = count; |
| michael@0 | 62 | } |
| michael@0 | 63 | |
| michael@0 | 64 | nsCOMPtr<nsIContent> refContent = parent->GetChildAt(mOffset); |
| michael@0 | 65 | // note, it's ok for refNode to be null. that means append |
| michael@0 | 66 | nsCOMPtr<nsIDOMNode> refNode = refContent ? refContent->AsDOMNode() : nullptr; |
| michael@0 | 67 | |
| michael@0 | 68 | mEditor->MarkNodeDirty(mNode); |
| michael@0 | 69 | |
| michael@0 | 70 | nsCOMPtr<nsIDOMNode> resultNode; |
| michael@0 | 71 | nsresult result = mParent->InsertBefore(mNode, refNode, getter_AddRefs(resultNode)); |
| michael@0 | 72 | NS_ENSURE_SUCCESS(result, result); |
| michael@0 | 73 | NS_ENSURE_TRUE(resultNode, NS_ERROR_NULL_POINTER); |
| michael@0 | 74 | |
| michael@0 | 75 | // only set selection to insertion point if editor gives permission |
| michael@0 | 76 | bool bAdjustSelection; |
| michael@0 | 77 | mEditor->ShouldTxnSetSelection(&bAdjustSelection); |
| michael@0 | 78 | if (bAdjustSelection) |
| michael@0 | 79 | { |
| michael@0 | 80 | nsCOMPtr<nsISelection> selection; |
| michael@0 | 81 | result = mEditor->GetSelection(getter_AddRefs(selection)); |
| michael@0 | 82 | NS_ENSURE_SUCCESS(result, result); |
| michael@0 | 83 | NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER); |
| michael@0 | 84 | // place the selection just after the inserted element |
| michael@0 | 85 | selection->Collapse(mParent, mOffset+1); |
| michael@0 | 86 | } |
| michael@0 | 87 | else |
| michael@0 | 88 | { |
| michael@0 | 89 | // do nothing - dom range gravity will adjust selection |
| michael@0 | 90 | } |
| michael@0 | 91 | return result; |
| michael@0 | 92 | } |
| michael@0 | 93 | |
| michael@0 | 94 | NS_IMETHODIMP InsertElementTxn::UndoTransaction(void) |
| michael@0 | 95 | { |
| michael@0 | 96 | NS_ENSURE_TRUE(mNode && mParent, NS_ERROR_NOT_INITIALIZED); |
| michael@0 | 97 | |
| michael@0 | 98 | nsCOMPtr<nsIDOMNode> resultNode; |
| michael@0 | 99 | return mParent->RemoveChild(mNode, getter_AddRefs(resultNode)); |
| michael@0 | 100 | } |
| michael@0 | 101 | |
| michael@0 | 102 | NS_IMETHODIMP InsertElementTxn::GetTxnDescription(nsAString& aString) |
| michael@0 | 103 | { |
| michael@0 | 104 | aString.AssignLiteral("InsertElementTxn"); |
| michael@0 | 105 | return NS_OK; |
| michael@0 | 106 | } |
