The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/editor/libeditor/base/InsertElementTxn.cpp	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,106 @@
     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 <stdio.h>                      // for printf
    1.10 +
    1.11 +#include "InsertElementTxn.h"
    1.12 +#include "nsAString.h"
    1.13 +#include "nsDebug.h"                    // for NS_ENSURE_TRUE, etc
    1.14 +#include "nsError.h"                    // for NS_ERROR_NULL_POINTER, etc
    1.15 +#include "nsIContent.h"                 // for nsIContent
    1.16 +#include "nsIEditor.h"                  // for nsIEditor
    1.17 +#include "nsINode.h"                    // for nsINode
    1.18 +#include "nsISelection.h"               // for nsISelection
    1.19 +#include "nsMemory.h"                   // for nsMemory
    1.20 +#include "nsReadableUtils.h"            // for ToNewCString
    1.21 +#include "nsString.h"                   // for nsString
    1.22 +
    1.23 +InsertElementTxn::InsertElementTxn()
    1.24 +  : EditTxn()
    1.25 +{
    1.26 +}
    1.27 +
    1.28 +NS_IMPL_CYCLE_COLLECTION_INHERITED(InsertElementTxn, EditTxn,
    1.29 +                                   mNode,
    1.30 +                                   mParent)
    1.31 +
    1.32 +NS_IMPL_ADDREF_INHERITED(InsertElementTxn, EditTxn)
    1.33 +NS_IMPL_RELEASE_INHERITED(InsertElementTxn, EditTxn)
    1.34 +NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(InsertElementTxn)
    1.35 +NS_INTERFACE_MAP_END_INHERITING(EditTxn)
    1.36 +
    1.37 +NS_IMETHODIMP InsertElementTxn::Init(nsIDOMNode *aNode,
    1.38 +                                     nsIDOMNode *aParent,
    1.39 +                                     int32_t     aOffset,
    1.40 +                                     nsIEditor  *aEditor)
    1.41 +{
    1.42 +  NS_ASSERTION(aNode && aParent && aEditor, "bad arg");
    1.43 +  NS_ENSURE_TRUE(aNode && aParent && aEditor, NS_ERROR_NULL_POINTER);
    1.44 +
    1.45 +  mNode = do_QueryInterface(aNode);
    1.46 +  mParent = do_QueryInterface(aParent);
    1.47 +  mOffset = aOffset;
    1.48 +  mEditor = aEditor;
    1.49 +  NS_ENSURE_TRUE(mNode && mParent && mEditor, NS_ERROR_INVALID_ARG);
    1.50 +  return NS_OK;
    1.51 +}
    1.52 +
    1.53 +
    1.54 +NS_IMETHODIMP InsertElementTxn::DoTransaction(void)
    1.55 +{
    1.56 +  NS_ENSURE_TRUE(mNode && mParent, NS_ERROR_NOT_INITIALIZED);
    1.57 +
    1.58 +  nsCOMPtr<nsINode> parent = do_QueryInterface(mParent);
    1.59 +  NS_ENSURE_STATE(parent);
    1.60 +
    1.61 +  uint32_t count = parent->GetChildCount();
    1.62 +  if (mOffset > int32_t(count) || mOffset == -1) {
    1.63 +    // -1 is sentinel value meaning "append at end"
    1.64 +    mOffset = count;
    1.65 +  }
    1.66 +
    1.67 +  nsCOMPtr<nsIContent> refContent = parent->GetChildAt(mOffset);
    1.68 +  // note, it's ok for refNode to be null.  that means append
    1.69 +  nsCOMPtr<nsIDOMNode> refNode = refContent ? refContent->AsDOMNode() : nullptr;
    1.70 +
    1.71 +  mEditor->MarkNodeDirty(mNode);
    1.72 +
    1.73 +  nsCOMPtr<nsIDOMNode> resultNode;
    1.74 +  nsresult result = mParent->InsertBefore(mNode, refNode, getter_AddRefs(resultNode));
    1.75 +  NS_ENSURE_SUCCESS(result, result);
    1.76 +  NS_ENSURE_TRUE(resultNode, NS_ERROR_NULL_POINTER);
    1.77 +
    1.78 +  // only set selection to insertion point if editor gives permission
    1.79 +  bool bAdjustSelection;
    1.80 +  mEditor->ShouldTxnSetSelection(&bAdjustSelection);
    1.81 +  if (bAdjustSelection)
    1.82 +  {
    1.83 +    nsCOMPtr<nsISelection> selection;
    1.84 +    result = mEditor->GetSelection(getter_AddRefs(selection));
    1.85 +    NS_ENSURE_SUCCESS(result, result);
    1.86 +    NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER);
    1.87 +    // place the selection just after the inserted element
    1.88 +    selection->Collapse(mParent, mOffset+1);
    1.89 +  }
    1.90 +  else
    1.91 +  {
    1.92 +    // do nothing - dom range gravity will adjust selection
    1.93 +  }
    1.94 +  return result;
    1.95 +}
    1.96 +
    1.97 +NS_IMETHODIMP InsertElementTxn::UndoTransaction(void)
    1.98 +{
    1.99 +  NS_ENSURE_TRUE(mNode && mParent, NS_ERROR_NOT_INITIALIZED);
   1.100 +
   1.101 +  nsCOMPtr<nsIDOMNode> resultNode;
   1.102 +  return mParent->RemoveChild(mNode, getter_AddRefs(resultNode));
   1.103 +}
   1.104 +
   1.105 +NS_IMETHODIMP InsertElementTxn::GetTxnDescription(nsAString& aString)
   1.106 +{
   1.107 +  aString.AssignLiteral("InsertElementTxn");
   1.108 +  return NS_OK;
   1.109 +}