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 "CSSToLengthConversionData.h"
33
34#include "RenderStyle.h"
35#include "RenderView.h"
36
37namespace WebCore {
38
39float CSSToLengthConversionData::zoom() const
40{
41 if (m_useEffectiveZoom)
42 return m_style ? m_style->effectiveZoom() : 1;
43 return m_zoom;
44}
45
46double CSSToLengthConversionData::viewportWidthFactor() const
47{
48 if (m_style && !m_computingFontSize)
49 const_cast<RenderStyle*>(m_style)->setHasViewportUnits();
50
51 if (!m_renderView)
52 return 0;
53
54 return m_renderView->viewportSizeForCSSViewportUnits().width() / 100.0;
55}
56
57double CSSToLengthConversionData::viewportHeightFactor() const
58{
59 if (m_style && !m_computingFontSize)
60 const_cast<RenderStyle*>(m_style)->setHasViewportUnits();
61
62 if (!m_renderView)
63 return 0;
64
65 return m_renderView->viewportSizeForCSSViewportUnits().height() / 100.0;
66}
67
68double CSSToLengthConversionData::viewportMinFactor() const
69{
70 if (m_style && !m_computingFontSize)
71 const_cast<RenderStyle*>(m_style)->setHasViewportUnits();
72
73 if (!m_renderView)
74 return 0;
75
76 IntSize viewportSizeForCSSViewportUnits = m_renderView->viewportSizeForCSSViewportUnits();
77 return std::min(viewportSizeForCSSViewportUnits.width(), viewportSizeForCSSViewportUnits.height()) / 100.0;
78}
79
80double CSSToLengthConversionData::viewportMaxFactor() const
81{
82 if (m_style && !m_computingFontSize)
83 const_cast<RenderStyle*>(m_style)->setHasViewportUnits();
84
85 if (!m_renderView)
86 return 0;
87
88 IntSize viewportSizeForCSSViewportUnits = m_renderView->viewportSizeForCSSViewportUnits();
89 return std::max(viewportSizeForCSSViewportUnits.width(), viewportSizeForCSSViewportUnits.height()) / 100.0;
90}
91
92} // namespace WebCore
93