The Tor Browser: editor/libeditor/base/InsertElementTxn.cpp@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     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/. */

     6 #include <stdio.h>                      // for printf

     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

    20 InsertElementTxn::InsertElementTxn()

    21   : EditTxn()

    22 {

    23 }

    25 NS_IMPL_CYCLE_COLLECTION_INHERITED(InsertElementTxn, EditTxn,

    26                                    mNode,

    27                                    mParent)

    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)

    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);

    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 }

    51 NS_IMETHODIMP InsertElementTxn::DoTransaction(void)

    52 {

    53   NS_ENSURE_TRUE(mNode && mParent, NS_ERROR_NOT_INITIALIZED);

    55   nsCOMPtr<nsINode> parent = do_QueryInterface(mParent);

    56   NS_ENSURE_STATE(parent);

    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   }

    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;

    68   mEditor->MarkNodeDirty(mNode);

    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);

    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 }

    94 NS_IMETHODIMP InsertElementTxn::UndoTransaction(void)

    95 {

    96   NS_ENSURE_TRUE(mNode && mParent, NS_ERROR_NOT_INITIALIZED);

    98   nsCOMPtr<nsIDOMNode> resultNode;

    99   return mParent->RemoveChild(mNode, getter_AddRefs(resultNode));

   100 }

   102 NS_IMETHODIMP InsertElementTxn::GetTxnDescription(nsAString& aString)

   103 {

   104   aString.AssignLiteral("InsertElementTxn");

   105   return NS_OK;

   106 }

The Tor Browser / file revision