nsIReflowCallback.h (1357B)
1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ 2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */ 3 /* This Source Code Form is subject to the terms of the Mozilla Public 4 * License, v. 2.0. If a copy of the MPL was not distributed with this 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 6 #ifndef nsIReflowCallback_h___ 7 #define nsIReflowCallback_h___ 8 9 /** 10 * Reflow callback interface. 11 * These are not refcounted. Objects must be removed from the presshell 12 * callback list before they die. 13 * Protocol: objects will either get a ReflowFinished() call when a reflow 14 * has finished or a ReflowCallbackCanceled() call if the shell is destroyed, 15 * whichever happens first. If the object is explicitly removed from the shell 16 * (using PresShell::CancelReflowCallback()) before that occurs then neither 17 * of the callback methods are called. 18 */ 19 class nsIReflowCallback { 20 public: 21 /** 22 * The presshell calls this when reflow has finished. Return true if 23 * you need a FlushType::Layout to happen after this. 24 */ 25 virtual bool ReflowFinished() = 0; 26 /** 27 * The presshell calls this on outstanding callback requests in its 28 * Destroy() method. The shell removes the request after calling 29 * ReflowCallbackCanceled(). 30 */ 31 virtual void ReflowCallbackCanceled() = 0; 32 }; 33 34 #endif /* nsIReflowCallback_h___ */