1 /*
2 * Copyright (c) 2008, 2009, Google 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 are
6 * met:
7 *
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 * * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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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.
29 */
30
31 #include "config.h"
32 #include "ScrollbarThemeChromiumLinux.h"
33
34 #include "PlatformBridge.h"
35 #include "PlatformMouseEvent.h"
36 #include "Scrollbar.h"
37
38 namespace WebCore {
39
nativeTheme()40 ScrollbarTheme* ScrollbarTheme::nativeTheme()
41 {
42 static ScrollbarThemeChromiumLinux theme;
43 return &theme;
44 }
45
scrollbarThickness(ScrollbarControlSize controlSize)46 int ScrollbarThemeChromiumLinux::scrollbarThickness(ScrollbarControlSize controlSize)
47 {
48 // Horiz and Vert scrollbars are the same thickness.
49 IntSize scrollbarSize = PlatformBridge::getThemePartSize(PlatformBridge::PartScrollbarVerticalTrack);
50 return scrollbarSize.width();
51 }
52
paintTrackPiece(GraphicsContext * gc,Scrollbar * scrollbar,const IntRect & rect,ScrollbarPart partType)53 void ScrollbarThemeChromiumLinux::paintTrackPiece(GraphicsContext* gc, Scrollbar* scrollbar, const IntRect& rect, ScrollbarPart partType)
54 {
55 PlatformBridge::ThemePaintState state = scrollbar->hoveredPart() == partType ? PlatformBridge::StateHover : PlatformBridge::StateNormal;
56 IntRect alignRect = trackRect(scrollbar, false);
57 PlatformBridge::ThemePaintExtraParams extraParams;
58 extraParams.scrollbarTrack.trackX = alignRect.x();
59 extraParams.scrollbarTrack.trackY = alignRect.y();
60 extraParams.scrollbarTrack.trackWidth = alignRect.width();
61 extraParams.scrollbarTrack.trackHeight = alignRect.height();
62 PlatformBridge::paintThemePart(
63 gc,
64 scrollbar->orientation() == HorizontalScrollbar ? PlatformBridge::PartScrollbarHorizontalTrack : PlatformBridge::PartScrollbarVerticalTrack,
65 state,
66 rect,
67 &extraParams);
68 }
69
paintButton(GraphicsContext * gc,Scrollbar * scrollbar,const IntRect & rect,ScrollbarPart part)70 void ScrollbarThemeChromiumLinux::paintButton(GraphicsContext* gc, Scrollbar* scrollbar, const IntRect& rect, ScrollbarPart part)
71 {
72 PlatformBridge::ThemePart paintPart;
73 PlatformBridge::ThemePaintState state = PlatformBridge::StateNormal;
74 bool checkMin = false;
75 bool checkMax = false;
76 if (scrollbar->orientation() == HorizontalScrollbar) {
77 if (part == BackButtonStartPart) {
78 paintPart = PlatformBridge::PartScrollbarLeftArrow;
79 checkMin = true;
80 } else {
81 paintPart = PlatformBridge::PartScrollbarRightArrow;
82 checkMax = true;
83 }
84 } else {
85 if (part == BackButtonStartPart) {
86 paintPart = PlatformBridge::PartScrollbarUpArrow;
87 checkMin = true;
88 } else {
89 paintPart = PlatformBridge::PartScrollbarDownArrow;
90 checkMax = true;
91 }
92 }
93 if ((checkMin && (scrollbar->currentPos() <= 0))
94 || (checkMax && scrollbar->currentPos() == scrollbar->maximum())) {
95 state = PlatformBridge::StateDisabled;
96 } else {
97 if (part == scrollbar->pressedPart())
98 state = PlatformBridge::StatePressed;
99 else if (part == scrollbar->hoveredPart())
100 state = PlatformBridge::StateHover;
101 }
102 PlatformBridge::paintThemePart(gc, paintPart, state, rect, 0);
103 }
104
paintThumb(GraphicsContext * gc,Scrollbar * scrollbar,const IntRect & rect)105 void ScrollbarThemeChromiumLinux::paintThumb(GraphicsContext* gc, Scrollbar* scrollbar, const IntRect& rect)
106 {
107 PlatformBridge::ThemePaintState state;
108
109 if (scrollbar->pressedPart() == ThumbPart)
110 state = PlatformBridge::StatePressed;
111 else if (scrollbar->hoveredPart() == ThumbPart)
112 state = PlatformBridge::StateHover;
113 else
114 state = PlatformBridge::StateNormal;
115 PlatformBridge::paintThemePart(
116 gc,
117 scrollbar->orientation() == HorizontalScrollbar ? PlatformBridge::PartScrollbarHorizontalThumb : PlatformBridge::PartScrollbarVerticalThumb,
118 state,
119 rect,
120 0);
121 }
122
shouldCenterOnThumb(Scrollbar *,const PlatformMouseEvent & evt)123 bool ScrollbarThemeChromiumLinux::shouldCenterOnThumb(Scrollbar*, const PlatformMouseEvent& evt)
124 {
125 return (evt.shiftKey() && evt.button() == LeftButton) || (evt.button() == MiddleButton);
126 }
127
buttonSize(Scrollbar * scrollbar)128 IntSize ScrollbarThemeChromiumLinux::buttonSize(Scrollbar* scrollbar)
129 {
130 if (scrollbar->orientation() == VerticalScrollbar) {
131 IntSize size = PlatformBridge::getThemePartSize(PlatformBridge::PartScrollbarUpArrow);
132 return IntSize(size.width(), scrollbar->height() < 2 * size.height() ? scrollbar->height() / 2 : size.height());
133 }
134
135 // HorizontalScrollbar
136 IntSize size = PlatformBridge::getThemePartSize(PlatformBridge::PartScrollbarLeftArrow);
137 return IntSize(scrollbar->width() < 2 * size.width() ? scrollbar->width() / 2 : size.width(), size.height());
138 }
139
minimumThumbLength(Scrollbar * scrollbar)140 int ScrollbarThemeChromiumLinux::minimumThumbLength(Scrollbar* scrollbar)
141 {
142 if (scrollbar->orientation() == VerticalScrollbar) {
143 IntSize size = PlatformBridge::getThemePartSize(PlatformBridge::PartScrollbarVerticalThumb);
144 return size.height();
145 }
146
147 IntSize size = PlatformBridge::getThemePartSize(PlatformBridge::PartScrollbarHorizontalThumb);
148 return size.width();
149 }
150
151 } // namespace WebCore
152