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#ifndef CSSToLengthConversionData_h
32#define CSSToLengthConversionData_h
33
34#include "wtf/Assertions.h"
35#include "wtf/Noncopyable.h"
36
37namespace WebCore {
38
39class RenderStyle;
40
41class CSSToLengthConversionData {
42public:
43    CSSToLengthConversionData(const RenderStyle* style, const RenderStyle* rootStyle, float zoom, bool computingFontSize = false)
44        : m_style(style)
45        , m_rootStyle(rootStyle)
46        , m_zoom(zoom)
47        , m_useEffectiveZoom(false)
48        , m_computingFontSize(computingFontSize)
49    {
50        ASSERT(zoom > 0);
51    }
52    CSSToLengthConversionData(const RenderStyle* style, const RenderStyle* rootStyle, bool computingFontSize = false)
53        : m_style(style)
54        , m_rootStyle(rootStyle)
55        , m_useEffectiveZoom(true)
56        , m_computingFontSize(computingFontSize)
57    {
58    }
59    const RenderStyle& style() const { return *m_style; }
60    const RenderStyle& rootStyle() const { return *m_rootStyle; }
61    float zoom() const;
62    bool computingFontSize() const { return m_computingFontSize; }
63
64    void setStyle(const RenderStyle* style) { m_style = style; }
65    void setRootStyle(const RenderStyle* rootStyle) { m_rootStyle = rootStyle; }
66
67    CSSToLengthConversionData copyWithAdjustedZoom(float newZoom) const
68    {
69        return CSSToLengthConversionData(m_style, m_rootStyle, newZoom, m_computingFontSize);
70    }
71
72private:
73    const RenderStyle* m_style;
74    const RenderStyle* m_rootStyle;
75    float m_zoom;
76    bool m_useEffectiveZoom;
77    bool m_computingFontSize;
78};
79
80} // namespace WebCore
81
82#endif
83