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 #include "config.h"
32 #include "core/css/CSSToLengthConversionData.h"
33
34 #include "core/rendering/RenderView.h"
35 #include "core/rendering/style/RenderStyle.h"
36
37 namespace WebCore {
38
CSSToLengthConversionData(const RenderStyle * style,const RenderStyle * rootStyle,const RenderView * renderView,float zoom,bool computingFontSize)39 CSSToLengthConversionData::CSSToLengthConversionData(const RenderStyle* style, const RenderStyle* rootStyle, const RenderView* renderView, float zoom, bool computingFontSize)
40 : m_style(style)
41 , m_rootStyle(rootStyle)
42 , m_viewportWidth(renderView ? renderView->layoutViewportWidth() : 0)
43 , m_viewportHeight(renderView ? renderView->layoutViewportHeight() : 0)
44 , m_zoom(zoom)
45 , m_useEffectiveZoom(false)
46 , m_computingFontSize(computingFontSize)
47 {
48 ASSERT(zoom > 0);
49 }
50
CSSToLengthConversionData(const RenderStyle * style,const RenderStyle * rootStyle,const RenderView * renderView,bool computingFontSize)51 CSSToLengthConversionData::CSSToLengthConversionData(const RenderStyle* style, const RenderStyle* rootStyle, const RenderView* renderView, bool computingFontSize)
52 : m_style(style)
53 , m_rootStyle(rootStyle)
54 , m_viewportWidth(renderView ? renderView->layoutViewportWidth() : 0)
55 , m_viewportHeight(renderView ? renderView->layoutViewportHeight() : 0)
56 , m_useEffectiveZoom(true)
57 , m_computingFontSize(computingFontSize)
58 {
59 }
60
CSSToLengthConversionData(const RenderStyle * style,const RenderStyle * rootStyle,float viewportWidth,float viewportHeight,float zoom,bool computingFontSize)61 CSSToLengthConversionData::CSSToLengthConversionData(const RenderStyle* style, const RenderStyle* rootStyle, float viewportWidth, float viewportHeight, float zoom, bool computingFontSize)
62 : m_style(style)
63 , m_rootStyle(rootStyle)
64 , m_viewportWidth(viewportWidth)
65 , m_viewportHeight(viewportHeight)
66 , m_zoom(zoom)
67 , m_useEffectiveZoom(false)
68 , m_computingFontSize(computingFontSize)
69 {
70 ASSERT(zoom > 0);
71 }
72
zoom() const73 float CSSToLengthConversionData::zoom() const
74 {
75 if (m_useEffectiveZoom)
76 return m_style ? m_style->effectiveZoom() : 1;
77 return m_zoom;
78 }
79
viewportWidthPercent() const80 double CSSToLengthConversionData::viewportWidthPercent() const
81 {
82 m_style->setHasViewportUnits();
83 return m_viewportWidth / 100;
84 }
viewportHeightPercent() const85 double CSSToLengthConversionData::viewportHeightPercent() const
86 {
87 m_style->setHasViewportUnits();
88 return m_viewportHeight / 100;
89 }
viewportMinPercent() const90 double CSSToLengthConversionData::viewportMinPercent() const
91 {
92 m_style->setHasViewportUnits();
93 return std::min(m_viewportWidth, m_viewportHeight) / 100;
94 }
viewportMaxPercent() const95 double CSSToLengthConversionData::viewportMaxPercent() const
96 {
97 m_style->setHasViewportUnits();
98 return std::max(m_viewportWidth, m_viewportHeight) / 100;
99 }
100
101 } // namespace WebCore
102