gecko-dev/docshell/base/nsDocShellEditorData.cpp

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/* -*- 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 the Mozilla browser.
*
* The Initial Developer of the Original Code is
* Netscape Communications, Inc.
* Portions created by the Initial Developer are Copyright (C) 1999
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Simon Fraser <sfraser@netscape.com>
*
* 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 "nsIComponentManager.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsIDOMWindow.h"
#include "nsIDocShellTreeItem.h"
#include "nsDocShellEditorData.h"
/*---------------------------------------------------------------------------
nsDocShellEditorData
----------------------------------------------------------------------------*/
nsDocShellEditorData::nsDocShellEditorData(nsIDocShell* inOwningDocShell)
: mDocShell(inOwningDocShell)
, mMakeEditable(PR_FALSE)
{
NS_ASSERTION(mDocShell, "Where is my docShell?");
}
/*---------------------------------------------------------------------------
~nsDocShellEditorData
----------------------------------------------------------------------------*/
nsDocShellEditorData::~nsDocShellEditorData()
{
if (mEditingSession)
{
nsCOMPtr<nsIDOMWindow> domWindow = do_GetInterface(mDocShell);
// This will eventually call nsDocShellEditorData::SetEditor(nsnull)
// which will call mEditorPreDestroy() and delete the editor
mEditingSession->TearDownEditorOnWindow(domWindow);
}
else if (mEditor) // Should never have this w/o nsEditingSession!
{
mEditor->PreDestroy();
mEditor = nsnull; // explicit clear to make destruction order predictable
}
}
/*---------------------------------------------------------------------------
MakeEditable
----------------------------------------------------------------------------*/
nsresult
nsDocShellEditorData::MakeEditable(PRBool inWaitForUriLoad /*, PRBool inEditable */)
{
if (mMakeEditable)
return NS_OK;
// if we are already editable, and are getting turned off,
// nuke the editor.
if (mEditor)
{
NS_WARNING("Destroying existing editor on frame");
mEditor->PreDestroy();
mEditor = nsnull;
}
mMakeEditable = PR_TRUE;
return NS_OK;
}
/*---------------------------------------------------------------------------
GetEditable
----------------------------------------------------------------------------*/
PRBool
nsDocShellEditorData::GetEditable()
{
return mMakeEditable || (mEditor != nsnull);
}
/*---------------------------------------------------------------------------
CreateEditor
----------------------------------------------------------------------------*/
nsresult
nsDocShellEditorData::CreateEditor()
{
nsCOMPtr<nsIEditingSession> editingSession;
nsresult rv = GetEditingSession(getter_AddRefs(editingSession));
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsIDOMWindow> domWindow = do_GetInterface(mDocShell);
rv = editingSession->SetupEditorOnWindow(domWindow);
if (NS_FAILED(rv)) return rv;
return NS_OK;
}
/*---------------------------------------------------------------------------
GetEditingSession
----------------------------------------------------------------------------*/
nsresult
nsDocShellEditorData::GetEditingSession(nsIEditingSession **outEditingSession)
{
nsresult rv = EnsureEditingSession();
NS_ENSURE_SUCCESS(rv, rv);
NS_ADDREF(*outEditingSession = mEditingSession);
return NS_OK;
}
/*---------------------------------------------------------------------------
GetEditor
----------------------------------------------------------------------------*/
nsresult
nsDocShellEditorData::GetEditor(nsIEditor **outEditor)
{
NS_ENSURE_ARG_POINTER(outEditor);
NS_IF_ADDREF(*outEditor = mEditor);
return NS_OK;
}
/*---------------------------------------------------------------------------
SetEditor
----------------------------------------------------------------------------*/
nsresult
nsDocShellEditorData::SetEditor(nsIEditor *inEditor)
{
// destroy any editor that we have. Checks for equality are
// necessary to ensure that assigment into the nsCOMPtr does
// not temporarily reduce the refCount of the editor to zero
if (mEditor.get() != inEditor)
{
if (mEditor)
{
mEditor->PreDestroy();
mEditor = nsnull;
}
mEditor = inEditor; // owning addref
}
return NS_OK;
}
/*---------------------------------------------------------------------------
EnsureEditingSession
This creates the editing session on the content docShell that owns
'this'.
----------------------------------------------------------------------------*/
nsresult
nsDocShellEditorData::EnsureEditingSession()
{
NS_ASSERTION(mDocShell, "Should have docShell here");
nsresult rv = NS_OK;
if (!mEditingSession)
{
mEditingSession =
do_CreateInstance("@mozilla.org/editor/editingsession;1", &rv);
}
return rv;
}