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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "config.h" | 5 #include "config.h" |
| 6 #include "core/paint/BoxDecorationData.h" | 6 #include "core/paint/BoxDecorationData.h" |
| 7 | 7 |
| 8 #include "core/layout/LayoutBox.h" | 8 #include "core/layout/LayoutBox.h" |
| 9 #include "core/style/BorderEdge.h" | 9 #include "core/style/BorderEdge.h" |
| 10 #include "core/style/ComputedStyle.h" | 10 #include "core/style/ComputedStyle.h" |
| 11 #include "platform/RuntimeEnabledFeatures.h" | 11 #include "platform/RuntimeEnabledFeatures.h" |
| 12 #include "platform/graphics/GraphicsContext.h" | 12 #include "platform/graphics/GraphicsContext.h" |
| 13 | 13 |
| 14 namespace blink { | 14 namespace blink { |
| 15 | 15 |
| 16 BoxDecorationData::BoxDecorationData(const LayoutBox& layoutBox) | 16 BoxDecorationData::BoxDecorationData(const LayoutBox& layoutBox) |
| 17 { | 17 { |
| 18 backgroundColor = layoutBox.style()->visitedDependentColor(CSSPropertyBackgr
oundColor); | 18 backgroundColor = layoutBox.style()->visitedDependentColor(CSSPropertyBackgr
oundColor); |
| 19 hasBackground = backgroundColor.alpha() || layoutBox.style()->hasBackgroundI
mage(); | 19 hasBackground = backgroundColor.alpha() || layoutBox.style()->hasBackgroundI
mage(); |
| 20 ASSERT(hasBackground == layoutBox.style()->hasBackground()); | 20 ASSERT(hasBackground == layoutBox.style()->hasBackground()); |
| 21 hasBorder = layoutBox.style()->hasBorder(); | 21 hasBorderDecoration = layoutBox.style()->hasBorderDecoration(); |
| 22 hasAppearance = layoutBox.style()->hasAppearance(); | 22 hasAppearance = layoutBox.style()->hasAppearance(); |
| 23 bleedAvoidance = determineBackgroundBleedAvoidance(layoutBox); | 23 bleedAvoidance = determineBackgroundBleedAvoidance(layoutBox); |
| 24 } | 24 } |
| 25 | 25 |
| 26 namespace { | 26 namespace { |
| 27 | 27 |
| 28 bool borderObscuresBackgroundEdge(const ComputedStyle& style) | 28 bool borderObscuresBackgroundEdge(const ComputedStyle& style) |
| 29 { | 29 { |
| 30 BorderEdge edges[4]; | 30 BorderEdge edges[4]; |
| 31 style.getBorderEdgeInfo(edges); | 31 style.getBorderEdgeInfo(edges); |
| 32 | 32 |
| 33 for (auto& edge : edges) { | 33 for (auto& edge : edges) { |
| 34 if (!edge.obscuresBackgroundEdge()) | 34 if (!edge.obscuresBackgroundEdge()) |
| 35 return false; | 35 return false; |
| 36 } | 36 } |
| 37 | 37 |
| 38 return true; | 38 return true; |
| 39 } | 39 } |
| 40 | 40 |
| 41 } // anonymous namespace | 41 } // anonymous namespace |
| 42 | 42 |
| 43 BackgroundBleedAvoidance BoxDecorationData::determineBackgroundBleedAvoidance(co
nst LayoutBox& layoutBox) | 43 BackgroundBleedAvoidance BoxDecorationData::determineBackgroundBleedAvoidance(co
nst LayoutBox& layoutBox) |
| 44 { | 44 { |
| 45 if (layoutBox.isDocumentElement()) | 45 if (layoutBox.isDocumentElement()) |
| 46 return BackgroundBleedNone; | 46 return BackgroundBleedNone; |
| 47 | 47 |
| 48 if (!hasBackground) | 48 if (!hasBackground) |
| 49 return BackgroundBleedNone; | 49 return BackgroundBleedNone; |
| 50 | 50 |
| 51 if (!hasBorder || !layoutBox.style()->hasBorderRadius() || layoutBox.canRend
erBorderImage()) { | 51 if (!hasBorderDecoration || !layoutBox.style()->hasBorderRadius() || layoutB
ox.canRenderBorderImage()) { |
| 52 if (layoutBox.backgroundShouldAlwaysBeClipped()) | 52 if (layoutBox.backgroundShouldAlwaysBeClipped()) |
| 53 return BackgroundBleedClipOnly; | 53 return BackgroundBleedClipOnly; |
| 54 return BackgroundBleedNone; | 54 return BackgroundBleedNone; |
| 55 } | 55 } |
| 56 | 56 |
| 57 if (borderObscuresBackgroundEdge(*layoutBox.style())) | 57 if (borderObscuresBackgroundEdge(*layoutBox.style())) |
| 58 return BackgroundBleedShrinkBackground; | 58 return BackgroundBleedShrinkBackground; |
| 59 | 59 |
| 60 if (!hasAppearance && layoutBox.style()->borderObscuresBackground() && layou
tBox.backgroundHasOpaqueTopLayer()) | 60 if (!hasAppearance && layoutBox.style()->borderObscuresBackground() && layou
tBox.backgroundHasOpaqueTopLayer()) |
| 61 return BackgroundBleedBackgroundOverBorder; | 61 return BackgroundBleedBackgroundOverBorder; |
| 62 | 62 |
| 63 return BackgroundBleedClipLayer; | 63 return BackgroundBleedClipLayer; |
| 64 } | 64 } |
| 65 | 65 |
| 66 } // namespace blink | 66 } // namespace blink |
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