1/*
2 * Copyright (C) 2011, 2012 Nokia Corporation and/or its subsidiary(-ies)
3 * Copyright (C) 2011 Benjamin Poulain <benjamin@webkit.org>
4 * Copyright (C) 2014 Igalia S.L.
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
15 *
16 * You should have received a copy of the GNU Library General Public License
17 * along with this program; see the file COPYING.LIB. If not, write to
18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
20 */
21
22#pragma once
23
24#if USE(COORDINATED_GRAPHICS)
25
26#include <WebCore/FloatPoint.h>
27#include <WebCore/FloatRect.h>
28#include <WebCore/FloatSize.h>
29#include <WebCore/IntRect.h>
30#include <WebCore/IntSize.h>
31#include <WebCore/ViewportArguments.h>
32#include <wtf/Noncopyable.h>
33
34namespace WebKit {
35
36class SimpleViewportController {
37 WTF_MAKE_NONCOPYABLE(SimpleViewportController);
38public:
39 SimpleViewportController(const WebCore::IntSize&);
40
41 void didChangeViewportSize(const WebCore::IntSize&);
42 void didChangeContentsSize(const WebCore::IntSize&);
43 void didChangeViewportAttributes(WebCore::ViewportAttributes&&);
44 void didScroll(const WebCore::IntPoint&);
45
46 WebCore::FloatRect visibleContentsRect() const;
47 float pageScaleFactor() const { return m_pageScaleFactor; }
48
49private:
50 WebCore::FloatSize visibleContentsSize() const;
51
52 void applyScaleAfterRenderingContents(float scale);
53 void applyPositionAfterRenderingContents(const WebCore::FloatPoint& pos);
54
55 WebCore::FloatPoint boundContentsPosition(const WebCore::FloatPoint&) const;
56 WebCore::FloatPoint boundContentsPositionAtScale(const WebCore::FloatPoint&, float scale) const;
57
58 bool updateMinimumScaleToFit();
59 float innerBoundedViewportScale(float) const;
60
61 void resetViewportToDefaultState();
62
63 WebCore::IntPoint m_contentsPosition;
64 WebCore::FloatSize m_contentsSize;
65 WebCore::FloatSize m_viewportSize;
66 float m_pageScaleFactor { 1 };
67
68 bool m_allowsUserScaling { false };
69 float m_minimumScaleToFit { 1 };
70 bool m_initiallyFitToViewport { false };
71
72 bool m_hasViewportAttribute { false };
73 WebCore::ViewportAttributes m_rawAttributes;
74};
75
76} // namespace WebKit
77
78#endif // USE(COORDINATED_GRAPHICS)
79