1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
|
/*
* Copyright (C) 2011 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "core/platform/ScrollbarThemeOverlay.h"
#include "core/platform/PlatformMouseEvent.h"
#include "core/platform/Scrollbar.h"
#include "core/platform/graphics/GraphicsContext.h"
#include "core/platform/graphics/transforms/TransformationMatrix.h"
#include <algorithm>
using namespace std;
namespace WebCore {
static const int scrollbarWidth = 3;
static const int scrollbarMargin = 4;
int ScrollbarThemeOverlay::scrollbarThickness(ScrollbarControlSize controlSize)
{
return scrollbarWidth + scrollbarMargin;
}
bool ScrollbarThemeOverlay::usesOverlayScrollbars() const
{
return true;
}
int ScrollbarThemeOverlay::thumbPosition(ScrollbarThemeClient* scrollbar)
{
if (!scrollbar->totalSize())
return 0;
int trackLen = trackLength(scrollbar);
float proportion = static_cast<float>(scrollbar->currentPos()) / scrollbar->totalSize();
return round(proportion * trackLen);
}
int ScrollbarThemeOverlay::thumbLength(ScrollbarThemeClient* scrollbar)
{
int trackLen = trackLength(scrollbar);
if (!scrollbar->totalSize())
return trackLen;
float proportion = (float)scrollbar->visibleSize() / scrollbar->totalSize();
int length = round(proportion * trackLen);
length = min(max(length, minimumThumbLength(scrollbar)), trackLen);
return length;
}
bool ScrollbarThemeOverlay::hasThumb(ScrollbarThemeClient* scrollbar)
{
return true;
}
IntRect ScrollbarThemeOverlay::backButtonRect(ScrollbarThemeClient*, ScrollbarPart, bool)
{
return IntRect();
}
IntRect ScrollbarThemeOverlay::forwardButtonRect(ScrollbarThemeClient*, ScrollbarPart, bool)
{
return IntRect();
}
IntRect ScrollbarThemeOverlay::trackRect(ScrollbarThemeClient* scrollbar, bool)
{
IntRect rect = scrollbar->frameRect();
if (scrollbar->orientation() == HorizontalScrollbar)
rect.inflateX(-scrollbarMargin);
else
rect.inflateY(-scrollbarMargin);
return rect;
}
void ScrollbarThemeOverlay::paintThumb(GraphicsContext* context, ScrollbarThemeClient* scrollbar, const IntRect& rect)
{
IntRect thumbRect = rect;
if (scrollbar->orientation() == HorizontalScrollbar)
thumbRect.setHeight(thumbRect.height() - scrollbarMargin);
else
thumbRect.setWidth(thumbRect.width() - scrollbarMargin);
context->fillRect(thumbRect, Color(128, 128, 128, 128));
}
} // namespace WebCore
|
