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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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