The Tor Browser / file comparison
comparison: editor/libeditor/base/DeleteNodeTxn.cpp
editor/libeditor/base/DeleteNodeTxn.cpp
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
equal
deleted
inserted
replaced
| -1:000000000000 | 0:084578daa48e |
|---|---|
| 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 "DeleteNodeTxn.h" | |
| 7 #include "nsDebug.h" | |
| 8 #include "nsEditor.h" | |
| 9 #include "nsError.h" | |
| 10 #include "nsSelectionState.h" // nsRangeUpdater | |
| 11 #include "nsAString.h" | |
| 12 | |
| 13 using namespace mozilla; | |
| 14 | |
| 15 DeleteNodeTxn::DeleteNodeTxn() | |
| 16 : EditTxn(), mNode(), mParent(), mRefNode(), mRangeUpdater(nullptr) | |
| 17 { | |
| 18 } | |
| 19 | |
| 20 NS_IMPL_CYCLE_COLLECTION_INHERITED(DeleteNodeTxn, EditTxn, | |
| 21 mNode, | |
| 22 mParent, | |
| 23 mRefNode) | |
| 24 | |
| 25 NS_IMPL_ADDREF_INHERITED(DeleteNodeTxn, EditTxn) | |
| 26 NS_IMPL_RELEASE_INHERITED(DeleteNodeTxn, EditTxn) | |
| 27 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(DeleteNodeTxn) | |
| 28 NS_INTERFACE_MAP_END_INHERITING(EditTxn) | |
| 29 | |
| 30 nsresult | |
| 31 DeleteNodeTxn::Init(nsEditor* aEditor, nsINode* aNode, | |
| 32 nsRangeUpdater* aRangeUpdater) | |
| 33 { | |
| 34 NS_ENSURE_TRUE(aEditor && aNode, NS_ERROR_NULL_POINTER); | |
| 35 mEditor = aEditor; | |
| 36 mNode = aNode; | |
| 37 mParent = aNode->GetParentNode(); | |
| 38 | |
| 39 // do nothing if the node has a parent and it's read-only | |
| 40 NS_ENSURE_TRUE(!mParent || mEditor->IsModifiableNode(mParent), | |
| 41 NS_ERROR_FAILURE); | |
| 42 | |
| 43 mRangeUpdater = aRangeUpdater; | |
| 44 return NS_OK; | |
| 45 } | |
| 46 | |
| 47 | |
| 48 NS_IMETHODIMP | |
| 49 DeleteNodeTxn::DoTransaction() | |
| 50 { | |
| 51 NS_ENSURE_TRUE(mNode, NS_ERROR_NOT_INITIALIZED); | |
| 52 | |
| 53 if (!mParent) { | |
| 54 // this is a no-op, there's no parent to delete mNode from | |
| 55 return NS_OK; | |
| 56 } | |
| 57 | |
| 58 // remember which child mNode was (by remembering which child was next); | |
| 59 // mRefNode can be null | |
| 60 mRefNode = mNode->GetNextSibling(); | |
| 61 | |
| 62 // give range updater a chance. SelAdjDeleteNode() needs to be called | |
| 63 // *before* we do the action, unlike some of the other nsRangeStore update | |
| 64 // methods. | |
| 65 if (mRangeUpdater) { | |
| 66 mRangeUpdater->SelAdjDeleteNode(mNode->AsDOMNode()); | |
| 67 } | |
| 68 | |
| 69 ErrorResult error; | |
| 70 mParent->RemoveChild(*mNode, error); | |
| 71 return error.ErrorCode(); | |
| 72 } | |
| 73 | |
| 74 NS_IMETHODIMP | |
| 75 DeleteNodeTxn::UndoTransaction() | |
| 76 { | |
| 77 if (!mParent) { | |
| 78 // this is a legal state, the txn is a no-op | |
| 79 return NS_OK; | |
| 80 } | |
| 81 if (!mNode) { | |
| 82 return NS_ERROR_NULL_POINTER; | |
| 83 } | |
| 84 | |
| 85 ErrorResult error; | |
| 86 mParent->InsertBefore(*mNode, mRefNode, error); | |
| 87 return error.ErrorCode(); | |
| 88 } | |
| 89 | |
| 90 NS_IMETHODIMP | |
| 91 DeleteNodeTxn::RedoTransaction() | |
| 92 { | |
| 93 if (!mParent) { | |
| 94 // this is a legal state, the txn is a no-op | |
| 95 return NS_OK; | |
| 96 } | |
| 97 if (!mNode) { | |
| 98 return NS_ERROR_NULL_POINTER; | |
| 99 } | |
| 100 | |
| 101 if (mRangeUpdater) { | |
| 102 mRangeUpdater->SelAdjDeleteNode(mNode->AsDOMNode()); | |
| 103 } | |
| 104 | |
| 105 ErrorResult error; | |
| 106 mParent->RemoveChild(*mNode, error); | |
| 107 return error.ErrorCode(); | |
| 108 } | |
| 109 | |
| 110 NS_IMETHODIMP | |
| 111 DeleteNodeTxn::GetTxnDescription(nsAString& aString) | |
| 112 { | |
| 113 aString.AssignLiteral("DeleteNodeTxn"); | |
| 114 return NS_OK; | |
| 115 } |
