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| 1 /* | 1 /* |
| 2 * Copyright (C) 2013 Google Inc. All rights reserved. | 2 * Copyright (C) 2013 Google Inc. All rights reserved. |
| 3 * | 3 * |
| 4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
| 5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
| 6 * met: | 6 * met: |
| 7 * | 7 * |
| 8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
| 9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
| 10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
| (...skipping 14 matching lines...) Expand all Loading... |
| 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 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. | 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 29 */ | 29 */ |
| 30 | 30 |
| 31 #include "config.h" | 31 #include "config.h" |
| 32 #include "core/css/CSSToLengthConversionData.h" | 32 #include "core/css/CSSToLengthConversionData.h" |
| 33 | 33 |
| 34 #include "core/layout/LayoutView.h" | 34 #include "core/layout/LayoutView.h" |
| 35 #include "core/layout/style/LayoutStyle.h" | 35 #include "core/layout/style/ComputedStyle.h" |
| 36 | 36 |
| 37 namespace blink { | 37 namespace blink { |
| 38 | 38 |
| 39 CSSToLengthConversionData::FontSizes::FontSizes(float em, float rem, const Font*
font) | 39 CSSToLengthConversionData::FontSizes::FontSizes(float em, float rem, const Font*
font) |
| 40 : m_em(em) | 40 : m_em(em) |
| 41 , m_rem(rem) | 41 , m_rem(rem) |
| 42 , m_font(font) | 42 , m_font(font) |
| 43 { | 43 { |
| 44 // FIXME: Improve RAII of StyleResolverState to use const Font&. | 44 // FIXME: Improve RAII of StyleResolverState to use const Font&. |
| 45 ASSERT(m_font); | 45 ASSERT(m_font); |
| 46 } | 46 } |
| 47 | 47 |
| 48 CSSToLengthConversionData::FontSizes::FontSizes(const LayoutStyle* style, const
LayoutStyle* rootStyle) | 48 CSSToLengthConversionData::FontSizes::FontSizes(const ComputedStyle* style, cons
t ComputedStyle* rootStyle) |
| 49 : FontSizes(style->computedFontSize(), rootStyle ? rootStyle->computedFontSi
ze() : 1.0f, &style->font()) | 49 : FontSizes(style->computedFontSize(), rootStyle ? rootStyle->computedFontSi
ze() : 1.0f, &style->font()) |
| 50 { | 50 { |
| 51 } | 51 } |
| 52 | 52 |
| 53 float CSSToLengthConversionData::FontSizes::ex() const | 53 float CSSToLengthConversionData::FontSizes::ex() const |
| 54 { | 54 { |
| 55 ASSERT(m_font); | 55 ASSERT(m_font); |
| 56 // FIXME: We have a bug right now where the zoom will be applied twice to EX
units. | 56 // FIXME: We have a bug right now where the zoom will be applied twice to EX
units. |
| 57 // We really need to compute EX using fontMetrics for the original specified
Size and not use | 57 // We really need to compute EX using fontMetrics for the original specified
Size and not use |
| 58 // our actual constructed rendering font. | 58 // our actual constructed rendering font. |
| 59 if (!m_font->fontMetrics().hasXHeight()) | 59 if (!m_font->fontMetrics().hasXHeight()) |
| 60 return m_em / 2.0f; | 60 return m_em / 2.0f; |
| 61 return m_font->fontMetrics().xHeight(); | 61 return m_font->fontMetrics().xHeight(); |
| 62 } | 62 } |
| 63 | 63 |
| 64 float CSSToLengthConversionData::FontSizes::ch() const | 64 float CSSToLengthConversionData::FontSizes::ch() const |
| 65 { | 65 { |
| 66 ASSERT(m_font); | 66 ASSERT(m_font); |
| 67 return m_font->fontMetrics().zeroWidth(); | 67 return m_font->fontMetrics().zeroWidth(); |
| 68 } | 68 } |
| 69 | 69 |
| 70 CSSToLengthConversionData::ViewportSize::ViewportSize(const LayoutView* layoutVi
ew) | 70 CSSToLengthConversionData::ViewportSize::ViewportSize(const LayoutView* layoutVi
ew) |
| 71 : m_width(layoutView ? layoutView->layoutViewportWidth() : 0) | 71 : m_width(layoutView ? layoutView->layoutViewportWidth() : 0) |
| 72 , m_height(layoutView ? layoutView->layoutViewportHeight() : 0) | 72 , m_height(layoutView ? layoutView->layoutViewportHeight() : 0) |
| 73 { | 73 { |
| 74 } | 74 } |
| 75 | 75 |
| 76 CSSToLengthConversionData::CSSToLengthConversionData(const LayoutStyle* style, c
onst FontSizes& fontSizes, const ViewportSize& viewportSize, float zoom) | 76 CSSToLengthConversionData::CSSToLengthConversionData(const ComputedStyle* style,
const FontSizes& fontSizes, const ViewportSize& viewportSize, float zoom) |
| 77 : m_style(style) | 77 : m_style(style) |
| 78 , m_fontSizes(fontSizes) | 78 , m_fontSizes(fontSizes) |
| 79 , m_viewportSize(viewportSize) | 79 , m_viewportSize(viewportSize) |
| 80 , m_zoom(clampTo<float>(zoom, std::numeric_limits<float>::denorm_min())) | 80 , m_zoom(clampTo<float>(zoom, std::numeric_limits<float>::denorm_min())) |
| 81 { | 81 { |
| 82 ASSERT(m_style); | 82 ASSERT(m_style); |
| 83 } | 83 } |
| 84 | 84 |
| 85 CSSToLengthConversionData::CSSToLengthConversionData(const LayoutStyle* style, c
onst LayoutStyle* rootStyle, const LayoutView* layoutView, float zoom) | 85 CSSToLengthConversionData::CSSToLengthConversionData(const ComputedStyle* style,
const ComputedStyle* rootStyle, const LayoutView* layoutView, float zoom) |
| 86 : CSSToLengthConversionData(style, FontSizes(style, rootStyle), ViewportSize
(layoutView), zoom) | 86 : CSSToLengthConversionData(style, FontSizes(style, rootStyle), ViewportSize
(layoutView), zoom) |
| 87 { | 87 { |
| 88 } | 88 } |
| 89 | 89 |
| 90 double CSSToLengthConversionData::viewportWidthPercent() const | 90 double CSSToLengthConversionData::viewportWidthPercent() const |
| 91 { | 91 { |
| 92 m_style->setHasViewportUnits(); | 92 m_style->setHasViewportUnits(); |
| 93 return m_viewportSize.width() / 100; | 93 return m_viewportSize.width() / 100; |
| 94 } | 94 } |
| 95 double CSSToLengthConversionData::viewportHeightPercent() const | 95 double CSSToLengthConversionData::viewportHeightPercent() const |
| 96 { | 96 { |
| 97 m_style->setHasViewportUnits(); | 97 m_style->setHasViewportUnits(); |
| 98 return m_viewportSize.height() / 100; | 98 return m_viewportSize.height() / 100; |
| 99 } | 99 } |
| 100 double CSSToLengthConversionData::viewportMinPercent() const | 100 double CSSToLengthConversionData::viewportMinPercent() const |
| 101 { | 101 { |
| 102 m_style->setHasViewportUnits(); | 102 m_style->setHasViewportUnits(); |
| 103 return std::min(m_viewportSize.width(), m_viewportSize.height()) / 100; | 103 return std::min(m_viewportSize.width(), m_viewportSize.height()) / 100; |
| 104 } | 104 } |
| 105 double CSSToLengthConversionData::viewportMaxPercent() const | 105 double CSSToLengthConversionData::viewportMaxPercent() const |
| 106 { | 106 { |
| 107 m_style->setHasViewportUnits(); | 107 m_style->setHasViewportUnits(); |
| 108 return std::max(m_viewportSize.width(), m_viewportSize.height()) / 100; | 108 return std::max(m_viewportSize.width(), m_viewportSize.height()) / 100; |
| 109 } | 109 } |
| 110 | 110 |
| 111 } // namespace blink | 111 } // namespace blink |
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