gecko-dev/layout/generic/nsIFrameFrame.h
Benjamin Smedberg 3498a5f86e Bug 396185 - Make nsIFrame derivatives and helper abstract classes use a different dynamic-cast system than nsISupports:
* we know all types frames may be cast to at compile time, so instead of extensible GUID IIDs, use a big enum (see nsQueryFrame::FrameIID)
* eliminate all vestiges of refcounting, since frames aren't refcounted

Some frames (SVG frames in particular) still implement nsISupports-derived interfaces, for example nsISVGValue. There is a FrameIID for nsISVGValue that lets you go from a frame to the XPCOM interface, but you can't query back.

r+sr=roc

nsITextControlFrame didn't have an IID the first time around, but this wasn't a compile error because nsITextControlFrame::kFrameIID inherited from nsIFormControlFrame::kFrameIID. I've added a static analysis pass to verify the correct behavior, since I can't figure out a way to make the compiler do it.

--HG--
extra : rebase_source : 4894a2ca0278e2ab92f27459db77165f8348cf41
2009-01-12 14:20:59 -05:00

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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/*
* interface for rendering objects for replaced elements containing a
* document, such as <frame>, <iframe>, and some <object>s
*/
#ifndef nsIFrameFrame_h___
#define nsIFrameFrame_h___
class nsIDocShell;
class nsIFrameFrame
{
public:
NS_DECLARE_FRAME_ACCESSOR(nsIFrameFrame)
NS_IMETHOD GetDocShell(nsIDocShell **aDocShell) = 0;
/**
* Only allowed to fail if the other frame is not the same type as
* this one or if one of the frames has no docshell. Don't call
* EndSwapDocShells() unless BeginSwapDocShells() succeeds.
*/
NS_IMETHOD BeginSwapDocShells(nsIFrame* aOther) = 0;
virtual void EndSwapDocShells(nsIFrame* aOther) = 0;
};
#endif