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1 /* | |
2 * Copyright (C) 2008 Apple 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 | |
6 * are met: | |
7 * 1. Redistributions of source code must retain the above copyright | |
8 * notice, this list of conditions and the following disclaimer. | |
9 * 2. Redistributions in binary form must reproduce the above copyright | |
10 * notice, this list of conditions and the following disclaimer in the | |
11 * documentation and/or other materials provided with the distribution. | |
12 * | |
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY | |
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR | |
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
24 */ | |
25 | |
26 #include "config.h" | |
27 #include "core/rendering/RenderScrollbarTheme.h" | |
28 | |
29 #include "core/paint/ScrollbarPainter.h" | |
30 #include "core/rendering/RenderScrollbar.h" | |
31 #include "platform/graphics/GraphicsContext.h" | |
32 #include "platform/graphics/paint/DrawingRecorder.h" | |
33 #include "platform/scroll/ScrollbarThemeClient.h" | |
34 #include "wtf/StdLibExtras.h" | |
35 | |
36 namespace blink { | |
37 | |
38 RenderScrollbarTheme* RenderScrollbarTheme::renderScrollbarTheme() | |
39 { | |
40 DEFINE_STATIC_LOCAL(RenderScrollbarTheme, theme, ()); | |
41 return &theme; | |
42 } | |
43 | |
44 void RenderScrollbarTheme::buttonSizesAlongTrackAxis(ScrollbarThemeClient* scrol
lbar, int& beforeSize, int& afterSize) | |
45 { | |
46 IntRect firstButton = backButtonRect(scrollbar, BackButtonStartPart); | |
47 IntRect secondButton = forwardButtonRect(scrollbar, ForwardButtonStartPart); | |
48 IntRect thirdButton = backButtonRect(scrollbar, BackButtonEndPart); | |
49 IntRect fourthButton = forwardButtonRect(scrollbar, ForwardButtonEndPart); | |
50 if (scrollbar->orientation() == HorizontalScrollbar) { | |
51 beforeSize = firstButton.width() + secondButton.width(); | |
52 afterSize = thirdButton.width() + fourthButton.width(); | |
53 } else { | |
54 beforeSize = firstButton.height() + secondButton.height(); | |
55 afterSize = thirdButton.height() + fourthButton.height(); | |
56 } | |
57 } | |
58 | |
59 bool RenderScrollbarTheme::hasButtons(ScrollbarThemeClient* scrollbar) | |
60 { | |
61 int startSize; | |
62 int endSize; | |
63 buttonSizesAlongTrackAxis(scrollbar, startSize, endSize); | |
64 return (startSize + endSize) <= (scrollbar->orientation() == HorizontalScrol
lbar ? scrollbar->width() : scrollbar->height()); | |
65 } | |
66 | |
67 bool RenderScrollbarTheme::hasThumb(ScrollbarThemeClient* scrollbar) | |
68 { | |
69 return trackLength(scrollbar) - thumbLength(scrollbar) >= 0; | |
70 } | |
71 | |
72 int RenderScrollbarTheme::minimumThumbLength(ScrollbarThemeClient* scrollbar) | |
73 { | |
74 return toRenderScrollbar(scrollbar)->minimumThumbLength(); | |
75 } | |
76 | |
77 IntRect RenderScrollbarTheme::backButtonRect(ScrollbarThemeClient* scrollbar, Sc
rollbarPart partType, bool) | |
78 { | |
79 return toRenderScrollbar(scrollbar)->buttonRect(partType); | |
80 } | |
81 | |
82 IntRect RenderScrollbarTheme::forwardButtonRect(ScrollbarThemeClient* scrollbar,
ScrollbarPart partType, bool) | |
83 { | |
84 return toRenderScrollbar(scrollbar)->buttonRect(partType); | |
85 } | |
86 | |
87 IntRect RenderScrollbarTheme::trackRect(ScrollbarThemeClient* scrollbar, bool) | |
88 { | |
89 if (!hasButtons(scrollbar)) | |
90 return scrollbar->frameRect(); | |
91 | |
92 int startLength; | |
93 int endLength; | |
94 buttonSizesAlongTrackAxis(scrollbar, startLength, endLength); | |
95 | |
96 return toRenderScrollbar(scrollbar)->trackRect(startLength, endLength); | |
97 } | |
98 | |
99 IntRect RenderScrollbarTheme::constrainTrackRectToTrackPieces(ScrollbarThemeClie
nt* scrollbar, const IntRect& rect) | |
100 { | |
101 IntRect backRect = toRenderScrollbar(scrollbar)->trackPieceRectWithMargins(B
ackTrackPart, rect); | |
102 IntRect forwardRect = toRenderScrollbar(scrollbar)->trackPieceRectWithMargin
s(ForwardTrackPart, rect); | |
103 IntRect result = rect; | |
104 if (scrollbar->orientation() == HorizontalScrollbar) { | |
105 result.setX(backRect.x()); | |
106 result.setWidth(forwardRect.maxX() - backRect.x()); | |
107 } else { | |
108 result.setY(backRect.y()); | |
109 result.setHeight(forwardRect.maxY() - backRect.y()); | |
110 } | |
111 return result; | |
112 } | |
113 | |
114 bool RenderScrollbarTheme::paint(ScrollbarThemeClient* scrollbar, GraphicsContex
t* graphicsContext, const IntRect& damageRect) | |
115 { | |
116 return paintInternal(scrollbar, graphicsContext, damageRect); | |
117 } | |
118 | |
119 void RenderScrollbarTheme::paintScrollCorner(GraphicsContext* context, DisplayIt
emClient displayItemClient, const IntRect& cornerRect) | |
120 { | |
121 DrawingRecorder recorder(context, displayItemClient, DisplayItem::ScrollbarC
orner, cornerRect); | |
122 // FIXME: Implement. | |
123 if (!recorder.canUseCachedDrawing()) | |
124 context->fillRect(cornerRect, Color::white); | |
125 } | |
126 | |
127 void RenderScrollbarTheme::paintScrollbarBackground(GraphicsContext* context, Sc
rollbarThemeClient* scrollbar) | |
128 { | |
129 ScrollbarPainter(*toRenderScrollbar(scrollbar)).paintPart(context, Scrollbar
BGPart, scrollbar->frameRect()); | |
130 } | |
131 | |
132 void RenderScrollbarTheme::paintTrackBackground(GraphicsContext* context, Scroll
barThemeClient* scrollbar, const IntRect& rect) | |
133 { | |
134 ScrollbarPainter(*toRenderScrollbar(scrollbar)).paintPart(context, TrackBGPa
rt, rect); | |
135 } | |
136 | |
137 void RenderScrollbarTheme::paintTrackPiece(GraphicsContext* context, ScrollbarTh
emeClient* scrollbar, const IntRect& rect, ScrollbarPart part) | |
138 { | |
139 ScrollbarPainter(*toRenderScrollbar(scrollbar)).paintPart(context, part, rec
t); | |
140 } | |
141 | |
142 void RenderScrollbarTheme::paintButton(GraphicsContext* context, ScrollbarThemeC
lient* scrollbar, const IntRect& rect, ScrollbarPart part) | |
143 { | |
144 ScrollbarPainter(*toRenderScrollbar(scrollbar)).paintPart(context, part, rec
t); | |
145 } | |
146 | |
147 void RenderScrollbarTheme::paintThumb(GraphicsContext* context, ScrollbarThemeCl
ient* scrollbar, const IntRect& rect) | |
148 { | |
149 ScrollbarPainter(*toRenderScrollbar(scrollbar)).paintPart(context, ThumbPart
, rect); | |
150 } | |
151 | |
152 void RenderScrollbarTheme::paintTickmarks(GraphicsContext* context, ScrollbarThe
meClient* scrollbar, const IntRect& rect) | |
153 { | |
154 DrawingRecorder recorder(context, scrollbar->displayItemClient(), DisplayIte
m::ScrollbarTickMark, rect); | |
155 if (!recorder.canUseCachedDrawing()) | |
156 ScrollbarTheme::theme()->paintTickmarks(context, scrollbar, rect); | |
157 } | |
158 | |
159 } | |
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