1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/base/nsIReflowCallback.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,33 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +#ifndef nsIReflowCallback_h___
1.9 +#define nsIReflowCallback_h___
1.10 +
1.11 +/**
1.12 + * Reflow callback interface.
1.13 + * These are not refcounted. Objects must be removed from the presshell
1.14 + * callback list before they die.
1.15 + * Protocol: objects will either get a ReflowFinished() call when a reflow
1.16 + * has finished or a ReflowCallbackCanceled() call if the shell is destroyed,
1.17 + * whichever happens first. If the object is explicitly removed from the shell
1.18 + * (using nsIPresShell::CancelReflowCallback()) before that occurs then neither
1.19 + * of the callback methods are called.
1.20 + */
1.21 +class nsIReflowCallback {
1.22 +public:
1.23 + /**
1.24 + * The presshell calls this when reflow has finished. Return true if
1.25 + * you need a Flush_Layout to happen after this.
1.26 + */
1.27 + virtual bool ReflowFinished() = 0;
1.28 + /**
1.29 + * The presshell calls this on outstanding callback requests in its
1.30 + * Destroy() method. The shell removes the request after calling
1.31 + * ReflowCallbackCanceled().
1.32 + */
1.33 + virtual void ReflowCallbackCanceled() = 0;
1.34 +};
1.35 +
1.36 +#endif /* nsIReflowCallback_h___ */
