pjs/docshell/base/nsDocShellEditorData.cpp

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* 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 Netscape are
* Copyright (C) 1999, Mozilla. All Rights Reserved.
*
* Contributor(s):
* Simon Fraser <sfraser@netscape.com>
*/
#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()
{
// Get editing session on the root docShell
nsCOMPtr <nsIEditingSession> editingSession;
GetOrCreateEditingSession(PR_FALSE, getter_AddRefs(editingSession));
if (editingSession)
{
nsCOMPtr<nsIDOMWindow> domWindow = do_GetInterface(mDocShell);
// This will eventually call nsDocShellEditorData::SetEditor(nsnull)
// which will call mEditorPreDestroy() and delete the editor
editingSession->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)
{
NS_ENSURE_ARG_POINTER(outEditingSession);
return GetOrCreateEditingSession(PR_TRUE, outEditingSession);
}
/*---------------------------------------------------------------------------
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;
}
/*---------------------------------------------------------------------------
GetOrCreateEditingSession
This creates the editing session on the content root docShell,
irrespective of the shell owning 'this'.
----------------------------------------------------------------------------*/
nsresult
nsDocShellEditorData::GetOrCreateEditingSession(PRBool inAllowCreation, nsIEditingSession **outEditingSession)
{
NS_ENSURE_ARG_POINTER(outEditingSession);
*outEditingSession = nsnull;
NS_ASSERTION(mDocShell, "Should have docShell here");
nsresult rv = NS_OK;
nsCOMPtr<nsIDocShellTreeItem> owningShell = do_QueryInterface(mDocShell);
if (!owningShell) return NS_ERROR_FAILURE;
// Get the root docshell
nsCOMPtr<nsIDocShellTreeItem> contentRootShell;
owningShell->GetSameTypeRootTreeItem(getter_AddRefs(contentRootShell));
if (!contentRootShell) return NS_ERROR_FAILURE;
if (contentRootShell.get() == owningShell.get())
{
// if we're on the root shell, go ahead and create the editing shell
// if necessary.
if (!mEditingSession)
{
// Caller doesn't want a new EditingSession if it doesn't already exist
if (!inAllowCreation)
return NS_OK;
mEditingSession = do_CreateInstance("@mozilla.org/editor/editingsession;1", &rv);
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsIDOMWindow> domWindow(do_GetInterface(mDocShell, &rv));
if (NS_FAILED(rv)) return rv;
rv = mEditingSession->Init(domWindow);
if (NS_FAILED(rv)) return rv;
}
NS_ADDREF(*outEditingSession = mEditingSession.get());
}
else
{
// otherwise we're on a subshell. In this case, call GetInterface
// on the root shell, which will come back into this routine,
// to the block above, and give us back the editing session on
// the content root.
nsCOMPtr<nsIEditingSession> editingSession = do_GetInterface(contentRootShell);
NS_ASSERTION(editingSession, "should have been able to get the editing session here");
NS_IF_ADDREF(*outEditingSession = editingSession.get());
}
return (*outEditingSession) ? NS_OK : NS_ERROR_FAILURE;
}