gecko/layout/xul/nsContainerBoxObject.cpp

94 lines
2.6 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 "nsCOMPtr.h"
#include "nsIContainerBoxObject.h"
#include "nsIBrowserBoxObject.h"
#include "nsIEditorBoxObject.h"
#include "nsIIFrameBoxObject.h"
#include "nsBoxObject.h"
#include "nsIDocShell.h"
#include "nsIContent.h"
#include "nsIDocument.h"
#include "nsIFrame.h"
#include "nsSubDocumentFrame.h"
/**
* nsContainerBoxObject implements deprecated nsIBrowserBoxObject,
* nsIEditorBoxObject and nsIIFrameBoxObject interfaces only because of the
* backward compatibility.
*/
class nsContainerBoxObject : public nsBoxObject,
public nsIBrowserBoxObject,
public nsIEditorBoxObject,
public nsIIFrameBoxObject
{
protected:
virtual ~nsContainerBoxObject() {}
public:
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_NSICONTAINERBOXOBJECT
NS_DECL_NSIBROWSERBOXOBJECT
NS_DECL_NSIEDITORBOXOBJECT
NS_DECL_NSIIFRAMEBOXOBJECT
};
NS_INTERFACE_MAP_BEGIN(nsContainerBoxObject)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsIContainerBoxObject, nsIBrowserBoxObject)
NS_INTERFACE_MAP_ENTRY(nsIBrowserBoxObject)
NS_INTERFACE_MAP_ENTRY(nsIEditorBoxObject)
NS_INTERFACE_MAP_ENTRY(nsIIFrameBoxObject)
NS_INTERFACE_MAP_END_INHERITING(nsBoxObject)
NS_IMPL_ADDREF_INHERITED(nsContainerBoxObject, nsBoxObject)
NS_IMPL_RELEASE_INHERITED(nsContainerBoxObject, nsBoxObject)
NS_IMETHODIMP nsContainerBoxObject::GetDocShell(nsIDocShell** aResult)
{
*aResult = nullptr;
nsSubDocumentFrame *subDocFrame = do_QueryFrame(GetFrame(false));
if (subDocFrame) {
// Ok, the frame for mContent is an nsSubDocumentFrame, it knows how
// to reach the docshell, so ask it...
return subDocFrame->GetDocShell(aResult);
}
if (!mContent) {
return NS_OK;
}
// No nsSubDocumentFrame available for mContent, try if there's a mapping
// between mContent's document to mContent's subdocument.
nsIDocument *doc = mContent->GetComposedDoc();
if (!doc) {
return NS_OK;
}
nsIDocument *sub_doc = doc->GetSubDocumentFor(mContent);
if (!sub_doc) {
return NS_OK;
}
NS_IF_ADDREF(*aResult = sub_doc->GetDocShell());
return NS_OK;
}
nsresult
NS_NewContainerBoxObject(nsIBoxObject** aResult)
{
*aResult = new nsContainerBoxObject();
if (!*aResult)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*aResult);
return NS_OK;
}