gecko-dev/docshell/base/nsDocShellEditorData.cpp
2012-07-30 17:20:58 +03:00

241 lines
5.9 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsIComponentManager.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsIDOMWindow.h"
#include "nsIDocShellTreeItem.h"
#include "nsIDOMDocument.h"
#include "nsDocShellEditorData.h"
/*---------------------------------------------------------------------------
nsDocShellEditorData
----------------------------------------------------------------------------*/
nsDocShellEditorData::nsDocShellEditorData(nsIDocShell* inOwningDocShell)
: mDocShell(inOwningDocShell)
, mMakeEditable(false)
, mIsDetached(false)
, mDetachedMakeEditable(false)
, mDetachedEditingState(nsIHTMLDocument::eOff)
{
NS_ASSERTION(mDocShell, "Where is my docShell?");
}
/*---------------------------------------------------------------------------
~nsDocShellEditorData
----------------------------------------------------------------------------*/
nsDocShellEditorData::~nsDocShellEditorData()
{
TearDownEditor();
}
void
nsDocShellEditorData::TearDownEditor()
{
if (mEditor) {
mEditor->PreDestroy(false);
mEditor = nullptr;
}
mEditingSession = nullptr;
mIsDetached = false;
}
/*---------------------------------------------------------------------------
MakeEditable
----------------------------------------------------------------------------*/
nsresult
nsDocShellEditorData::MakeEditable(bool inWaitForUriLoad)
{
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(false);
mEditor = nullptr;
}
if (inWaitForUriLoad)
mMakeEditable = true;
return NS_OK;
}
/*---------------------------------------------------------------------------
GetEditable
----------------------------------------------------------------------------*/
bool
nsDocShellEditorData::GetEditable()
{
return mMakeEditable || (mEditor != nullptr);
}
/*---------------------------------------------------------------------------
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(false);
mEditor = nullptr;
}
mEditor = inEditor; // owning addref
if (!mEditor)
mMakeEditable = false;
}
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");
NS_ASSERTION(!mIsDetached, "This will stomp editing session!");
nsresult rv = NS_OK;
if (!mEditingSession)
{
mEditingSession =
do_CreateInstance("@mozilla.org/editor/editingsession;1", &rv);
}
return rv;
}
nsresult
nsDocShellEditorData::DetachFromWindow()
{
NS_ASSERTION(mEditingSession,
"Can't detach when we don't have a session to detach!");
nsCOMPtr<nsIDOMWindow> domWindow = do_GetInterface(mDocShell);
nsresult rv = mEditingSession->DetachFromWindow(domWindow);
NS_ENSURE_SUCCESS(rv, rv);
mIsDetached = true;
mDetachedMakeEditable = mMakeEditable;
mMakeEditable = false;
nsCOMPtr<nsIDOMDocument> domDoc;
domWindow->GetDocument(getter_AddRefs(domDoc));
nsCOMPtr<nsIHTMLDocument> htmlDoc = do_QueryInterface(domDoc);
if (htmlDoc)
mDetachedEditingState = htmlDoc->GetEditingState();
mDocShell = nullptr;
return NS_OK;
}
nsresult
nsDocShellEditorData::ReattachToWindow(nsIDocShell* aDocShell)
{
mDocShell = aDocShell;
nsCOMPtr<nsIDOMWindow> domWindow = do_GetInterface(mDocShell);
nsresult rv = mEditingSession->ReattachToWindow(domWindow);
NS_ENSURE_SUCCESS(rv, rv);
mIsDetached = false;
mMakeEditable = mDetachedMakeEditable;
nsCOMPtr<nsIDOMDocument> domDoc;
domWindow->GetDocument(getter_AddRefs(domDoc));
nsCOMPtr<nsIHTMLDocument> htmlDoc = do_QueryInterface(domDoc);
if (htmlDoc)
htmlDoc->SetEditingState(mDetachedEditingState);
return NS_OK;
}