1/*
2 * Copyright (C) 2013 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 * * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#pragma once
32
33#include <wtf/Assertions.h>
34
35namespace WebCore {
36
37class RenderStyle;
38class RenderView;
39
40class CSSToLengthConversionData {
41public:
42 CSSToLengthConversionData(const RenderStyle* style, const RenderStyle* rootStyle, const RenderView* renderView, float zoom, bool computingFontSize = false)
43 : m_style(style)
44 , m_rootStyle(rootStyle)
45 , m_renderView(renderView)
46 , m_zoom(zoom)
47 , m_useEffectiveZoom(false)
48 , m_computingFontSize(computingFontSize)
49 {
50 ASSERT(zoom > 0);
51 }
52
53 CSSToLengthConversionData(const RenderStyle* style, const RenderStyle* rootStyle, const RenderView* renderView, bool computingFontSize = false)
54 : m_style(style)
55 , m_rootStyle(rootStyle)
56 , m_renderView(renderView)
57 , m_zoom(1)
58 , m_useEffectiveZoom(true)
59 , m_computingFontSize(computingFontSize)
60 {
61 }
62
63 CSSToLengthConversionData()
64 : CSSToLengthConversionData(nullptr, nullptr, nullptr)
65 {
66 }
67
68 const RenderStyle* style() const { return m_style; }
69 const RenderStyle* rootStyle() const { return m_rootStyle; }
70 float zoom() const;
71 bool computingFontSize() const { return m_computingFontSize; }
72
73 double viewportWidthFactor() const;
74 double viewportHeightFactor() const;
75 double viewportMinFactor() const;
76 double viewportMaxFactor() const;
77
78 CSSToLengthConversionData copyWithAdjustedZoom(float newZoom) const
79 {
80 return CSSToLengthConversionData(m_style, m_rootStyle, m_renderView, newZoom, m_computingFontSize);
81 }
82
83private:
84 const RenderStyle* m_style;
85 const RenderStyle* m_rootStyle;
86 const RenderView* m_renderView;
87 float m_zoom;
88 bool m_useEffectiveZoom;
89 bool m_computingFontSize;
90};
91
92} // namespace WebCore
93