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 "RenderScrollbarTheme.h"
28 #include "RenderScrollbar.h"
29 #include <wtf/StdLibExtras.h>
30
31 namespace WebCore {
32
renderScrollbarTheme()33 RenderScrollbarTheme* RenderScrollbarTheme::renderScrollbarTheme()
34 {
35 DEFINE_STATIC_LOCAL(RenderScrollbarTheme, theme, ());
36 return &theme;
37 }
38
buttonSizesAlongTrackAxis(Scrollbar * scrollbar,int & beforeSize,int & afterSize)39 void RenderScrollbarTheme::buttonSizesAlongTrackAxis(Scrollbar* scrollbar, int& beforeSize, int& afterSize)
40 {
41 IntRect firstButton = backButtonRect(scrollbar, BackButtonStartPart);
42 IntRect secondButton = forwardButtonRect(scrollbar, ForwardButtonStartPart);
43 IntRect thirdButton = backButtonRect(scrollbar, BackButtonEndPart);
44 IntRect fourthButton = forwardButtonRect(scrollbar, ForwardButtonEndPart);
45 if (scrollbar->orientation() == HorizontalScrollbar) {
46 beforeSize = firstButton.width() + secondButton.width();
47 afterSize = thirdButton.width() + fourthButton.width();
48 } else {
49 beforeSize = firstButton.height() + secondButton.height();
50 afterSize = thirdButton.height() + fourthButton.height();
51 }
52 }
53
hasButtons(Scrollbar * scrollbar)54 bool RenderScrollbarTheme::hasButtons(Scrollbar* scrollbar)
55 {
56 int startSize;
57 int endSize;
58 buttonSizesAlongTrackAxis(scrollbar, startSize, endSize);
59 return (startSize + endSize) <= (scrollbar->orientation() == HorizontalScrollbar ? scrollbar->width() : scrollbar->height());
60 }
61
hasThumb(Scrollbar * scrollbar)62 bool RenderScrollbarTheme::hasThumb(Scrollbar* scrollbar)
63 {
64 return trackLength(scrollbar) - thumbLength(scrollbar) >= 0;
65 }
66
minimumThumbLength(Scrollbar * scrollbar)67 int RenderScrollbarTheme::minimumThumbLength(Scrollbar* scrollbar)
68 {
69 return toRenderScrollbar(scrollbar)->minimumThumbLength();
70 }
71
backButtonRect(Scrollbar * scrollbar,ScrollbarPart partType,bool)72 IntRect RenderScrollbarTheme::backButtonRect(Scrollbar* scrollbar, ScrollbarPart partType, bool)
73 {
74 return toRenderScrollbar(scrollbar)->buttonRect(partType);
75 }
76
forwardButtonRect(Scrollbar * scrollbar,ScrollbarPart partType,bool)77 IntRect RenderScrollbarTheme::forwardButtonRect(Scrollbar* scrollbar, ScrollbarPart partType, bool)
78 {
79 return toRenderScrollbar(scrollbar)->buttonRect(partType);
80 }
81
trackRect(Scrollbar * scrollbar,bool)82 IntRect RenderScrollbarTheme::trackRect(Scrollbar* scrollbar, bool)
83 {
84 if (!hasButtons(scrollbar))
85 return scrollbar->frameRect();
86
87 int startLength;
88 int endLength;
89 buttonSizesAlongTrackAxis(scrollbar, startLength, endLength);
90
91 return toRenderScrollbar(scrollbar)->trackRect(startLength, endLength);
92 }
93
constrainTrackRectToTrackPieces(Scrollbar * scrollbar,const IntRect & rect)94 IntRect RenderScrollbarTheme::constrainTrackRectToTrackPieces(Scrollbar* scrollbar, const IntRect& rect)
95 {
96 IntRect backRect = toRenderScrollbar(scrollbar)->trackPieceRectWithMargins(BackTrackPart, rect);
97 IntRect forwardRect = toRenderScrollbar(scrollbar)->trackPieceRectWithMargins(ForwardTrackPart, rect);
98 IntRect result = rect;
99 if (scrollbar->orientation() == HorizontalScrollbar) {
100 result.setX(backRect.x());
101 result.setWidth(forwardRect.right() - backRect.x());
102 } else {
103 result.setY(backRect.y());
104 result.setHeight(forwardRect.bottom() - backRect.y());
105 }
106 return result;
107 }
108
paintScrollCorner(ScrollView *,GraphicsContext * context,const IntRect & cornerRect)109 void RenderScrollbarTheme::paintScrollCorner(ScrollView*, GraphicsContext* context, const IntRect& cornerRect)
110 {
111 // FIXME: Implement.
112 context->fillRect(cornerRect, Color::white, DeviceColorSpace);
113 }
114
paintScrollbarBackground(GraphicsContext * context,Scrollbar * scrollbar)115 void RenderScrollbarTheme::paintScrollbarBackground(GraphicsContext* context, Scrollbar* scrollbar)
116 {
117 toRenderScrollbar(scrollbar)->paintPart(context, ScrollbarBGPart, scrollbar->frameRect());
118 }
119
paintTrackBackground(GraphicsContext * context,Scrollbar * scrollbar,const IntRect & rect)120 void RenderScrollbarTheme::paintTrackBackground(GraphicsContext* context, Scrollbar* scrollbar, const IntRect& rect)
121 {
122 toRenderScrollbar(scrollbar)->paintPart(context, TrackBGPart, rect);
123 }
124
paintTrackPiece(GraphicsContext * context,Scrollbar * scrollbar,const IntRect & rect,ScrollbarPart part)125 void RenderScrollbarTheme::paintTrackPiece(GraphicsContext* context, Scrollbar* scrollbar, const IntRect& rect, ScrollbarPart part)
126 {
127 toRenderScrollbar(scrollbar)->paintPart(context, part, rect);
128 }
129
paintButton(GraphicsContext * context,Scrollbar * scrollbar,const IntRect & rect,ScrollbarPart part)130 void RenderScrollbarTheme::paintButton(GraphicsContext* context, Scrollbar* scrollbar, const IntRect& rect, ScrollbarPart part)
131 {
132 toRenderScrollbar(scrollbar)->paintPart(context, part, rect);
133 }
134
paintThumb(GraphicsContext * context,Scrollbar * scrollbar,const IntRect & rect)135 void RenderScrollbarTheme::paintThumb(GraphicsContext* context, Scrollbar* scrollbar, const IntRect& rect)
136 {
137 toRenderScrollbar(scrollbar)->paintPart(context, ThumbPart, rect);
138 }
139
140 }
141