The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/editor/libeditor/base/DeleteNodeTxn.cpp	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,115 @@
     1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
     1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
     1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
     1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
     1.8 +
     1.9 +#include "DeleteNodeTxn.h"
    1.10 +#include "nsDebug.h"
    1.11 +#include "nsEditor.h"
    1.12 +#include "nsError.h"
    1.13 +#include "nsSelectionState.h" // nsRangeUpdater
    1.14 +#include "nsAString.h"
    1.15 +
    1.16 +using namespace mozilla;
    1.17 +
    1.18 +DeleteNodeTxn::DeleteNodeTxn()
    1.19 +  : EditTxn(), mNode(), mParent(), mRefNode(), mRangeUpdater(nullptr)
    1.20 +{
    1.21 +}
    1.22 +
    1.23 +NS_IMPL_CYCLE_COLLECTION_INHERITED(DeleteNodeTxn, EditTxn,
    1.24 +                                   mNode,
    1.25 +                                   mParent,
    1.26 +                                   mRefNode)
    1.27 +
    1.28 +NS_IMPL_ADDREF_INHERITED(DeleteNodeTxn, EditTxn)
    1.29 +NS_IMPL_RELEASE_INHERITED(DeleteNodeTxn, EditTxn)
    1.30 +NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(DeleteNodeTxn)
    1.31 +NS_INTERFACE_MAP_END_INHERITING(EditTxn)
    1.32 +
    1.33 +nsresult
    1.34 +DeleteNodeTxn::Init(nsEditor* aEditor, nsINode* aNode,
    1.35 +                    nsRangeUpdater* aRangeUpdater)
    1.36 +{
    1.37 +  NS_ENSURE_TRUE(aEditor && aNode, NS_ERROR_NULL_POINTER);
    1.38 +  mEditor = aEditor;
    1.39 +  mNode = aNode;
    1.40 +  mParent = aNode->GetParentNode();
    1.41 +
    1.42 +  // do nothing if the node has a parent and it's read-only
    1.43 +  NS_ENSURE_TRUE(!mParent || mEditor->IsModifiableNode(mParent),
    1.44 +                 NS_ERROR_FAILURE);
    1.45 +
    1.46 +  mRangeUpdater = aRangeUpdater;
    1.47 +  return NS_OK;
    1.48 +}
    1.49 +
    1.50 +
    1.51 +NS_IMETHODIMP
    1.52 +DeleteNodeTxn::DoTransaction()
    1.53 +{
    1.54 +  NS_ENSURE_TRUE(mNode, NS_ERROR_NOT_INITIALIZED);
    1.55 +
    1.56 +  if (!mParent) {
    1.57 +    // this is a no-op, there's no parent to delete mNode from
    1.58 +    return NS_OK;
    1.59 +  }
    1.60 +
    1.61 +  // remember which child mNode was (by remembering which child was next);
    1.62 +  // mRefNode can be null
    1.63 +  mRefNode = mNode->GetNextSibling();
    1.64 +
    1.65 +  // give range updater a chance.  SelAdjDeleteNode() needs to be called
    1.66 +  // *before* we do the action, unlike some of the other nsRangeStore update
    1.67 +  // methods.
    1.68 +  if (mRangeUpdater) {
    1.69 +    mRangeUpdater->SelAdjDeleteNode(mNode->AsDOMNode());
    1.70 +  }
    1.71 +
    1.72 +  ErrorResult error;
    1.73 +  mParent->RemoveChild(*mNode, error);
    1.74 +  return error.ErrorCode();
    1.75 +}
    1.76 +
    1.77 +NS_IMETHODIMP
    1.78 +DeleteNodeTxn::UndoTransaction()
    1.79 +{
    1.80 +  if (!mParent) {
    1.81 +    // this is a legal state, the txn is a no-op
    1.82 +    return NS_OK;
    1.83 +  }
    1.84 +  if (!mNode) {
    1.85 +    return NS_ERROR_NULL_POINTER;
    1.86 +  }
    1.87 +
    1.88 +  ErrorResult error;
    1.89 +  mParent->InsertBefore(*mNode, mRefNode, error);
    1.90 +  return error.ErrorCode();
    1.91 +}
    1.92 +
    1.93 +NS_IMETHODIMP
    1.94 +DeleteNodeTxn::RedoTransaction()
    1.95 +{
    1.96 +  if (!mParent) {
    1.97 +    // this is a legal state, the txn is a no-op
    1.98 +    return NS_OK;
    1.99 +  }
   1.100 +  if (!mNode) {
   1.101 +    return NS_ERROR_NULL_POINTER;
   1.102 +  }
   1.103 +
   1.104 +  if (mRangeUpdater) {
   1.105 +    mRangeUpdater->SelAdjDeleteNode(mNode->AsDOMNode());
   1.106 +  }
   1.107 +
   1.108 +  ErrorResult error;
   1.109 +  mParent->RemoveChild(*mNode, error);
   1.110 +  return error.ErrorCode();
   1.111 +}
   1.112 +
   1.113 +NS_IMETHODIMP
   1.114 +DeleteNodeTxn::GetTxnDescription(nsAString& aString)
   1.115 +{
   1.116 +  aString.AssignLiteral("DeleteNodeTxn");
   1.117 +  return NS_OK;
   1.118 +}