RetroZilla/editor/libeditor/base/nsStyleSheetTxns.cpp

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2015-10-21 05:03:22 +02:00
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998-1999
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsEditor.h"
#include "nsIPresShell.h"
#include "nsICSSStyleSheet.h"
#include "nsIDocument.h"
#include "nsIDocumentObserver.h"
#include "nsISelectionController.h"
#include "nsStyleSheetTxns.h"
static void
AddStyleSheet(nsIEditor* aEditor, nsIStyleSheet* aSheet)
{
nsCOMPtr<nsIDOMDocument> domDoc;
aEditor->GetDocument(getter_AddRefs(domDoc));
nsCOMPtr<nsIDocument> doc = do_QueryInterface(domDoc);
if (doc) {
doc->BeginUpdate(UPDATE_STYLE);
doc->AddStyleSheet(aSheet);
doc->EndUpdate(UPDATE_STYLE);
}
}
static void
RemoveStyleSheet(nsIEditor *aEditor, nsIStyleSheet *aSheet)
{
nsCOMPtr<nsIDOMDocument> domDoc;
aEditor->GetDocument(getter_AddRefs(domDoc));
nsCOMPtr<nsIDocument> doc = do_QueryInterface(domDoc);
if (doc) {
doc->BeginUpdate(UPDATE_STYLE);
doc->RemoveStyleSheet(aSheet);
doc->EndUpdate(UPDATE_STYLE);
}
}
AddStyleSheetTxn::AddStyleSheetTxn()
: EditTxn()
, mEditor(NULL)
{
}
AddStyleSheetTxn::~AddStyleSheetTxn()
{
}
NS_IMETHODIMP
AddStyleSheetTxn::Init(nsIEditor *aEditor, nsICSSStyleSheet *aSheet)
{
if (!aEditor)
return NS_ERROR_INVALID_ARG;
if (!aSheet)
return NS_ERROR_INVALID_ARG;
mEditor = aEditor;
mSheet = do_QueryInterface(aSheet);
return NS_OK;
}
NS_IMETHODIMP
AddStyleSheetTxn::DoTransaction()
{
if (!mEditor || !mSheet)
return NS_ERROR_NOT_INITIALIZED;
AddStyleSheet(mEditor, mSheet);
return NS_OK;
}
NS_IMETHODIMP
AddStyleSheetTxn::UndoTransaction()
{
if (!mEditor || !mSheet)
return NS_ERROR_NOT_INITIALIZED;
RemoveStyleSheet(mEditor, mSheet);
return NS_OK;
}
NS_IMETHODIMP
AddStyleSheetTxn::RedoTransaction()
{
return DoTransaction();
}
NS_IMETHODIMP
AddStyleSheetTxn::Merge(nsITransaction *aTransaction, PRBool *aDidMerge)
{
// set out param default value
if (!aDidMerge)
return NS_ERROR_NULL_POINTER;
*aDidMerge = PR_FALSE;
return NS_OK;
}
NS_IMETHODIMP
AddStyleSheetTxn::GetTxnDescription(nsAString& aString)
{
aString.AssignLiteral("AddStyleSheetTxn");
return NS_OK;
}
#ifdef XP_MAC
#pragma mark -
#endif
RemoveStyleSheetTxn::RemoveStyleSheetTxn()
: EditTxn()
, mEditor(NULL)
{
}
RemoveStyleSheetTxn::~RemoveStyleSheetTxn()
{
}
NS_IMETHODIMP
RemoveStyleSheetTxn::Init(nsIEditor *aEditor, nsICSSStyleSheet *aSheet)
{
if (!aEditor)
return NS_ERROR_INVALID_ARG;
if (!aSheet)
return NS_ERROR_INVALID_ARG;
mEditor = aEditor;
mSheet = do_QueryInterface(aSheet);
return NS_OK;
}
NS_IMETHODIMP
RemoveStyleSheetTxn::DoTransaction()
{
if (!mEditor || !mSheet)
return NS_ERROR_NOT_INITIALIZED;
RemoveStyleSheet(mEditor, mSheet);
return NS_OK;
}
NS_IMETHODIMP
RemoveStyleSheetTxn::UndoTransaction()
{
if (!mEditor || !mSheet)
return NS_ERROR_NOT_INITIALIZED;
AddStyleSheet(mEditor, mSheet);
return NS_OK;
}
NS_IMETHODIMP
RemoveStyleSheetTxn::RedoTransaction()
{
return DoTransaction();
}
NS_IMETHODIMP
RemoveStyleSheetTxn::Merge(nsITransaction *aTransaction, PRBool *aDidMerge)
{
// set out param default value
if (!aDidMerge)
return NS_ERROR_NULL_POINTER;
*aDidMerge = PR_FALSE;
return NS_OK;
}
NS_IMETHODIMP
RemoveStyleSheetTxn::GetTxnDescription(nsAString& aString)
{
aString.AssignLiteral("RemoveStyleSheetTxn");
return NS_OK;
}