34 lines
1.3 KiB
C++
34 lines
1.3 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsIReflowCallback_h___
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#define nsIReflowCallback_h___
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/**
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* Reflow callback interface.
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* These are not refcounted. Objects must be removed from the presshell
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* callback list before they die.
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* Protocol: objects will either get a ReflowFinished() call when a reflow
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* has finished or a ReflowCallbackCanceled() call if the shell is destroyed,
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* whichever happens first. If the object is explicitly removed from the shell
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* (using nsIPresShell::CancelReflowCallback()) before that occurs then neither
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* of the callback methods are called.
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*/
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class nsIReflowCallback {
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public:
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/**
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* The presshell calls this when reflow has finished. Return true if
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* you need a Flush_Layout to happen after this.
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*/
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virtual bool ReflowFinished() = 0;
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/**
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* The presshell calls this on outstanding callback requests in its
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* Destroy() method. The shell removes the request after calling
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* ReflowCallbackCanceled().
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*/
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virtual void ReflowCallbackCanceled() = 0;
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};
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#endif /* nsIReflowCallback_h___ */
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