pjs/editor/libeditor/base/nsStyleSheetTxns.cpp

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C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#include "nsEditor.h"
#include "nsIPresShell.h"
#include "nsICSSStyleSheet.h"
#include "nsIStyleSet.h"
#include "nsIDocument.h"
#include "nsIDocumentObserver.h"
#include "nsStyleSheetTxns.h"
AddStyleSheetTxn::AddStyleSheetTxn()
: 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::Do()
{
if (!mEditor || !mSheet)
return NS_ERROR_NOT_INITIALIZED;
nsCOMPtr<nsIPresShell> presShell;
mEditor->GetPresShell(getter_AddRefs(presShell));
if (!presShell)
return NS_ERROR_UNEXPECTED;
nsCOMPtr<nsIStyleSet> styleSet;
nsresult rv = presShell->GetStyleSet(getter_AddRefs(styleSet));
if (NS_SUCCEEDED(rv) && styleSet)
{
nsCOMPtr<nsIStyleSheet> styleSheet = do_QueryInterface(mSheet);
if (styleSheet)
{
nsCOMPtr<nsIDocument> document;
rv = presShell->GetDocument(getter_AddRefs(document));
if (NS_SUCCEEDED(rv) && document)
document->AddStyleSheet(styleSheet);
}
}
return rv;
}
NS_IMETHODIMP
AddStyleSheetTxn::Undo()
{
if (!mEditor || !mSheet)
return NS_ERROR_NOT_INITIALIZED;
nsCOMPtr<nsIPresShell> presShell;
mEditor->GetPresShell(getter_AddRefs(presShell));
if (!presShell)
return NS_ERROR_UNEXPECTED;
nsCOMPtr<nsIStyleSet> styleSet;
nsresult rv = presShell->GetStyleSet(getter_AddRefs(styleSet));
if (NS_SUCCEEDED(rv) && styleSet)
{
styleSet->RemoveDocStyleSheet(mSheet);
nsCOMPtr<nsIDocumentObserver> observer = do_QueryInterface(presShell);
nsCOMPtr<nsIStyleSheet> styleSheet = do_QueryInterface(mSheet);
nsCOMPtr<nsIDocument> document;
rv = presShell->GetDocument(getter_AddRefs(document));
if (NS_SUCCEEDED(rv) && document && observer && styleSheet)
rv = observer->StyleSheetRemoved(document, styleSheet);
}
return rv;
}
NS_IMETHODIMP
AddStyleSheetTxn::Redo()
{
return Do();
}
NS_IMETHODIMP
AddStyleSheetTxn::Merge(PRBool *aDidMerge, nsITransaction *aTransaction)
{
// set out param default value
if (!aDidMerge)
return NS_ERROR_NULL_POINTER;
*aDidMerge = PR_FALSE;
return NS_OK;
}
NS_IMETHODIMP
AddStyleSheetTxn::Write(nsIOutputStream *aOutputStream)
{
return NS_OK;
}
NS_IMETHODIMP
AddStyleSheetTxn::GetUndoString(nsString *aString)
{
if (aString)
{
*aString="Remove Style Sheet";
}
return NS_OK;
}
NS_IMETHODIMP
AddStyleSheetTxn::GetRedoString(nsString *aString)
{
if (aString)
{
*aString="Add Style Sheet";
}
return NS_OK;
}
#ifdef XP_MAC
#pragma mark -
#endif
RemoveStyleSheetTxn::RemoveStyleSheetTxn()
: 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::Do()
{
if (!mEditor || !mSheet)
return NS_ERROR_NOT_INITIALIZED;
nsCOMPtr<nsIPresShell> presShell;
mEditor->GetPresShell(getter_AddRefs(presShell));
if (!presShell)
return NS_ERROR_UNEXPECTED;
nsCOMPtr<nsIStyleSet> styleSet;
nsresult rv = presShell->GetStyleSet(getter_AddRefs(styleSet));
if (NS_SUCCEEDED(rv) && styleSet)
{
styleSet->RemoveDocStyleSheet(mSheet);
nsCOMPtr<nsIDocumentObserver> observer = do_QueryInterface(presShell);
nsCOMPtr<nsIStyleSheet> styleSheet = do_QueryInterface(mSheet);
nsCOMPtr<nsIDocument> document;
rv = presShell->GetDocument(getter_AddRefs(document));
if (NS_SUCCEEDED(rv) && document && observer && styleSheet)
rv = observer->StyleSheetRemoved(document, styleSheet);
}
return rv;
}
NS_IMETHODIMP
RemoveStyleSheetTxn::Undo()
{
if (!mEditor || !mSheet)
return NS_ERROR_NOT_INITIALIZED;
nsCOMPtr<nsIPresShell> presShell;
mEditor->GetPresShell(getter_AddRefs(presShell));
if (!presShell)
return NS_ERROR_UNEXPECTED;
nsCOMPtr<nsIStyleSet> styleSet;
nsresult rv = presShell->GetStyleSet(getter_AddRefs(styleSet));
if (NS_SUCCEEDED(rv) && styleSet)
{
nsCOMPtr<nsIStyleSheet> styleSheet = do_QueryInterface(mSheet);
if (styleSheet)
{
nsCOMPtr<nsIDocument> document;
rv = presShell->GetDocument(getter_AddRefs(document));
if (NS_SUCCEEDED(rv) && document)
document->AddStyleSheet(styleSheet);
}
}
return rv;
}
NS_IMETHODIMP
RemoveStyleSheetTxn::Redo()
{
return Do();
}
NS_IMETHODIMP
RemoveStyleSheetTxn::Merge(PRBool *aDidMerge, nsITransaction *aTransaction)
{
// set out param default value
if (!aDidMerge)
return NS_ERROR_NULL_POINTER;
*aDidMerge = PR_FALSE;
return NS_OK;
}
NS_IMETHODIMP
RemoveStyleSheetTxn::Write(nsIOutputStream *aOutputStream)
{
return NS_OK;
}
NS_IMETHODIMP
RemoveStyleSheetTxn::GetUndoString(nsString *aString)
{
if (aString)
{
*aString="Add Style Sheet";
}
return NS_OK;
}
NS_IMETHODIMP
RemoveStyleSheetTxn::GetRedoString(nsString *aString)
{
if (aString)
{
*aString="Remove Style Sheet";
}
return NS_OK;
}