1/*
2 * Copyright (C) 2003 Apple Inc.
3 *
4 * Portions are Copyright (C) 1998 Netscape Communications Corporation.
5 *
6 * Other contributors:
7 * Robert O'Callahan <roc+@cs.cmu.edu>
8 * David Baron <dbaron@fas.harvard.edu>
9 * Christian Biesinger <cbiesinger@web.de>
10 * Randall Jesup <rjesup@wgate.com>
11 * Roland Mainz <roland.mainz@informatik.med.uni-giessen.de>
12 * Josh Soref <timeless@mac.com>
13 * Boris Zbarsky <bzbarsky@mit.edu>
14 *
15 * This library is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU Lesser General Public
17 * License as published by the Free Software Foundation; either
18 * version 2.1 of the License, or (at your option) any later version.
19 *
20 * This library is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
23 * Lesser General Public License for more details.
24 *
25 * You should have received a copy of the GNU Lesser General Public
26 * License along with this library; if not, write to the Free Software
27 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28 *
29 * Alternatively, the contents of this file may be used under the terms
30 * of either the Mozilla Public License Version 1.1, found at
31 * http://www.mozilla.org/MPL/ (the "MPL") or the GNU General Public
32 * License Version 2.0, found at http://www.fsf.org/copyleft/gpl.html
33 * (the "GPL"), in which case the provisions of the MPL or the GPL are
34 * applicable instead of those above. If you wish to allow use of your
35 * version of this file only under the terms of one of those two
36 * licenses (the MPL or the GPL) and not to allow others to use your
37 * version of this file under the LGPL, indicate your decision by
38 * deletingthe provisions above and replace them with the notice and
39 * other provisions required by the MPL or the GPL, as the case may be.
40 * If you do not delete the provisions above, a recipient may use your
41 * version of this file under any of the LGPL, the MPL or the GPL.
42 */
43
44#pragma once
45
46#include "Length.h"
47#include "RenderStyleConstants.h"
48#include "Timer.h"
49
50namespace WebCore {
51
52class RenderLayer;
53
54// This class handles the auto-scrolling for <marquee>
55class RenderMarquee final {
56 WTF_MAKE_NONCOPYABLE(RenderMarquee); WTF_MAKE_FAST_ALLOCATED;
57public:
58 explicit RenderMarquee(RenderLayer*);
59 ~RenderMarquee();
60
61 bool isHorizontal() const;
62
63 void start();
64 void suspend();
65 void stop();
66
67 void updateMarqueeStyle();
68 void updateMarqueePosition();
69
70private:
71
72 int speed() const { return m_speed; }
73 int marqueeSpeed() const;
74
75 MarqueeDirection direction() const;
76
77 int computePosition(MarqueeDirection, bool stopAtClientEdge);
78
79 void setEnd(int end) { m_end = end; }
80
81 void timerFired();
82
83 RenderLayer* m_layer;
84 Timer m_timer;
85 int m_currentLoop { 0 };
86 int m_totalLoops { 0 };
87 int m_start { 0 };
88 int m_end { 0 };
89 int m_speed { 0 };
90 Length m_height;
91 MarqueeDirection m_direction { MarqueeDirection::Auto };
92 bool m_reset { false };
93 bool m_suspended { false };
94 bool m_stopped { false };
95};
96
97} // namespace WebCore
98