/src/mozilla-central/docshell/base/nsIScrollObserver.h
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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 | | |
7 | | #ifndef nsIScrollObserver_h___ |
8 | | #define nsIScrollObserver_h___ |
9 | | |
10 | | #include "nsISupports.h" |
11 | | #include "Units.h" |
12 | | |
13 | | // Must be kept in sync with xpcom/rust/xpcom/src/interfaces/nonidl.rs |
14 | | #define NS_ISCROLLOBSERVER_IID \ |
15 | | { 0xaa5026eb, 0x2f88, 0x4026, \ |
16 | | { 0xa4, 0x6b, 0xf4, 0x59, 0x6b, 0x4e, 0xdf, 0x00 } } |
17 | | |
18 | | class nsIScrollObserver : public nsISupports |
19 | | { |
20 | | public: |
21 | | NS_DECLARE_STATIC_IID_ACCESSOR(NS_ISCROLLOBSERVER_IID) |
22 | | |
23 | | /** |
24 | | * Called when the scroll position of some element has changed. |
25 | | */ |
26 | | virtual void ScrollPositionChanged() = 0; |
27 | | |
28 | | /** |
29 | | * Called when an async panning/zooming transform has started being applied |
30 | | * and passed the scroll offset |
31 | | */ |
32 | 0 | virtual void AsyncPanZoomStarted() {}; |
33 | | |
34 | | /** |
35 | | * Called when an async panning/zooming transform is no longer applied |
36 | | * and passed the scroll offset |
37 | | */ |
38 | 0 | virtual void AsyncPanZoomStopped() {}; |
39 | | }; |
40 | | |
41 | | NS_DEFINE_STATIC_IID_ACCESSOR(nsIScrollObserver, NS_ISCROLLOBSERVER_IID) |
42 | | |
43 | | #endif /* nsIScrollObserver_h___ */ |