The Tor Browser: editor/libeditor/base/ChangeAttributeTxn.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 "ChangeAttributeTxn.h"

     7 #include "nsAString.h"

     8 #include "nsDebug.h"                    // for NS_ASSERTION

     9 #include "nsError.h"                    // for NS_ERROR_NOT_INITIALIZED, etc

    10 #include "nsIDOMElement.h"              // for nsIDOMElement

    11 #include "nsIEditor.h"                  // for nsIEditor

    12 #include "nsString.h"                   // for nsString

    14 ChangeAttributeTxn::ChangeAttributeTxn()

    15   : EditTxn()

    16 {

    17 }

    19 NS_IMPL_CYCLE_COLLECTION_INHERITED(ChangeAttributeTxn, EditTxn,

    20                                    mElement)

    22 NS_IMPL_ADDREF_INHERITED(ChangeAttributeTxn, EditTxn)

    23 NS_IMPL_RELEASE_INHERITED(ChangeAttributeTxn, EditTxn)

    24 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(ChangeAttributeTxn)

    25 NS_INTERFACE_MAP_END_INHERITING(EditTxn)

    27 NS_IMETHODIMP ChangeAttributeTxn::Init(nsIEditor      *aEditor,

    28                                        nsIDOMElement  *aElement,

    29                                        const nsAString& aAttribute,

    30                                        const nsAString& aValue,

    31                                        bool aRemoveAttribute)

    32 {

    33   NS_ASSERTION(aEditor && aElement, "bad arg");

    34   if (!aEditor || !aElement) { return NS_ERROR_NULL_POINTER; }

    36   mEditor = aEditor;

    37   mElement = do_QueryInterface(aElement);

    38   mAttribute = aAttribute;

    39   mValue = aValue;

    40   mRemoveAttribute = aRemoveAttribute;

    41   mAttributeWasSet=false;

    42   mUndoValue.Truncate();

    43   return NS_OK;

    44 }

    46 NS_IMETHODIMP ChangeAttributeTxn::DoTransaction(void)

    47 {

    48   NS_ASSERTION(mEditor && mElement, "bad state");

    49   if (!mEditor || !mElement) { return NS_ERROR_NOT_INITIALIZED; }

    51   // need to get the current value of the attribute and save it, and set mAttributeWasSet

    52   nsresult result = mEditor->GetAttributeValue(mElement, mAttribute, mUndoValue, &mAttributeWasSet);

    53   // XXX: hack until attribute-was-set code is implemented

    54   if (!mUndoValue.IsEmpty())

    55     mAttributeWasSet = true;

    56   // XXX: end hack

    58   // now set the attribute to the new value

    59   if (!mRemoveAttribute)

    60     result = mElement->SetAttribute(mAttribute, mValue);

    61   else

    62     result = mElement->RemoveAttribute(mAttribute);

    64   return result;

    65 }

    67 NS_IMETHODIMP ChangeAttributeTxn::UndoTransaction(void)

    68 {

    69   NS_ASSERTION(mEditor && mElement, "bad state");

    70   if (!mEditor || !mElement) { return NS_ERROR_NOT_INITIALIZED; }

    72   nsresult result;

    73   if (mAttributeWasSet)

    74     result = mElement->SetAttribute(mAttribute, mUndoValue);

    75   else

    76     result = mElement->RemoveAttribute(mAttribute);

    78   return result;

    79 }

    81 NS_IMETHODIMP ChangeAttributeTxn::RedoTransaction(void)

    82 {

    83   NS_ASSERTION(mEditor && mElement, "bad state");

    84   if (!mEditor || !mElement) { return NS_ERROR_NOT_INITIALIZED; }

    86   nsresult result;

    87   if (!mRemoveAttribute)

    88     result = mElement->SetAttribute(mAttribute, mValue);

    89   else

    90     result = mElement->RemoveAttribute(mAttribute);

    92   return result;

    93 }

    95 NS_IMETHODIMP ChangeAttributeTxn::GetTxnDescription(nsAString& aString)

    96 {

    97   aString.AssignLiteral("ChangeAttributeTxn: [mRemoveAttribute == ");

    99   if (!mRemoveAttribute)

   100     aString.AppendLiteral("false] ");

   101   else

   102     aString.AppendLiteral("true] ");

   103   aString += mAttribute;

   104   return NS_OK;

   105 }

The Tor Browser / file revision