initial import
[vuplus_webkit] / Source / WebKit2 / UIProcess / FindIndicator.cpp
1 /*
2  * Copyright (C) 2010 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. AND ITS CONTRIBUTORS ``AS IS''
14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23  * THE POSSIBILITY OF SUCH DAMAGE.
24  */
25
26 #include "config.h"
27 #include "FindIndicator.h"
28
29 #include "ShareableBitmap.h"
30 #include <WebCore/Gradient.h>
31 #include <WebCore/GraphicsContext.h>
32 #include <WebCore/IntRect.h>
33 #include <WebCore/Path.h>
34
35 using namespace WebCore;
36
37 static const float cornerRadius = 3.0;
38
39 static const float shadowOffsetX = 0.0;
40 static const float shadowOffsetY = 1.0;
41 static const float shadowBlurRadius = 3.0;
42
43 static const int shadowRed = 0;
44 static const int shadowGreen = 0;
45 static const int shadowBlue = 0;
46 static const int shadowAlpha = 204;
47
48 static const float lightBorderThickness = 1.0;
49 static const float horizontalPaddingInsideLightBorder = 3.0;
50 static const float verticalPaddingInsideLightBorder = 1.0;
51
52 static const float horizontalBorderInsideShadow = lightBorderThickness + horizontalPaddingInsideLightBorder;
53 static const float verticalBorderInsideShadow = lightBorderThickness + verticalPaddingInsideLightBorder;
54
55 static const float leftBorderThickness = horizontalBorderInsideShadow + shadowOffsetX + shadowBlurRadius / 2.0;
56 static const float topBorderThickness = verticalBorderInsideShadow - shadowOffsetY + shadowBlurRadius / 2.0;
57 static const float rightBorderThickness = horizontalBorderInsideShadow - shadowOffsetX + shadowBlurRadius / 2.0;
58 static const float bottomBorderThickness = verticalBorderInsideShadow + shadowOffsetY + shadowBlurRadius / 2.0;
59
60 static const float horizontalOutsetToCenterOfLightBorder = horizontalBorderInsideShadow - lightBorderThickness / 2.0;
61 static const float verticalOutsetToCenterOfLightBorder = verticalBorderInsideShadow - lightBorderThickness / 2.0;
62
63 static const int lightBorderRed = 245;
64 static const int lightBorderGreen = 230;
65 static const int lightBorderBlue = 0;
66 static const int lightBorderAlpha = 255;
67
68 static const int gradientDarkRed = 237;
69 static const int gradientDarkGreen = 204;
70 static const int gradientDarkBlue = 0;
71 static const int gradientDarkAlpha = 255;
72
73 static const int gradientLightRed = 242;
74 static const int gradientLightGreen = 239;
75 static const int gradientLightBlue = 0;
76 static const int gradientLightAlpha = 255;
77
78 namespace WebKit {
79
80 PassRefPtr<FindIndicator> FindIndicator::create(const FloatRect& selectionRectInWindowCoordinates, const Vector<FloatRect>& textRectsInSelectionRectCoordinates, float contentImageScaleFactor, const ShareableBitmap::Handle& contentImageHandle)
81 {
82     RefPtr<ShareableBitmap> contentImage = ShareableBitmap::create(contentImageHandle);
83     if (!contentImage)
84         return 0;
85     ASSERT(contentImageScaleFactor != 1 || contentImage->size() == enclosingIntRect(selectionRectInWindowCoordinates).size());
86
87     return adoptRef(new FindIndicator(selectionRectInWindowCoordinates, textRectsInSelectionRectCoordinates, contentImageScaleFactor, contentImage.release()));
88 }
89
90 FindIndicator::FindIndicator(const WebCore::FloatRect& selectionRectInWindowCoordinates, const Vector<WebCore::FloatRect>& textRectsInSelectionRectCoordinates, float contentImageScaleFactor, PassRefPtr<ShareableBitmap> contentImage)
91     : m_selectionRectInWindowCoordinates(selectionRectInWindowCoordinates)
92     , m_textRectsInSelectionRectCoordinates(textRectsInSelectionRectCoordinates)
93     , m_contentImageScaleFactor(contentImageScaleFactor)
94     , m_contentImage(contentImage)
95 {
96 }
97
98 FindIndicator::~FindIndicator()
99 {
100 }
101
102 static FloatRect inflateRect(const FloatRect& rect, float inflateX, float inflateY)
103 {
104     FloatRect inflatedRect = rect;
105     inflatedRect.inflateX(inflateX);
106     inflatedRect.inflateY(inflateY);
107     
108     return inflatedRect;
109 }
110
111 FloatRect FindIndicator::frameRect() const
112 {
113     return FloatRect(m_selectionRectInWindowCoordinates.x() - leftBorderThickness, m_selectionRectInWindowCoordinates.y() - topBorderThickness,
114                      m_selectionRectInWindowCoordinates.width() + rightBorderThickness + leftBorderThickness,
115                      m_selectionRectInWindowCoordinates.height() + topBorderThickness + bottomBorderThickness);
116 }
117
118 static Color lightBorderColor()
119 {
120     return Color(lightBorderRed, lightBorderGreen, lightBorderBlue, lightBorderAlpha);
121 }
122
123 static Color shadowColor()
124 {
125     return Color(shadowRed, shadowGreen, shadowBlue, shadowAlpha);
126 }
127
128 static Color gradientLightColor()
129 {
130     return Color(gradientLightRed, gradientLightGreen, gradientLightBlue, gradientLightAlpha);
131 }
132
133 static Color gradientDarkColor()
134 {
135     return Color(gradientDarkRed, gradientDarkGreen, gradientDarkBlue, gradientDarkAlpha);
136 }
137
138 static Path pathWithRoundedRect(const FloatRect& pathRect, float radius)
139 {
140     Path path;
141     path.addRoundedRect(pathRect, FloatSize(radius, radius));
142
143     return path;
144 }
145     
146 void FindIndicator::draw(GraphicsContext& graphicsContext, const IntRect& dirtyRect)
147 {
148     for (size_t i = 0; i < m_textRectsInSelectionRectCoordinates.size(); ++i) {
149         FloatRect textRect = m_textRectsInSelectionRectCoordinates[i];
150         textRect.move(leftBorderThickness, topBorderThickness);
151
152         FloatRect outerPathRect = inflateRect(textRect, horizontalOutsetToCenterOfLightBorder, verticalOutsetToCenterOfLightBorder);
153         FloatRect innerPathRect = inflateRect(textRect, horizontalPaddingInsideLightBorder, verticalPaddingInsideLightBorder);
154
155         {
156             GraphicsContextStateSaver stateSaver(graphicsContext);
157             graphicsContext.setShadow(FloatSize(shadowOffsetX, shadowOffsetY), shadowBlurRadius, shadowColor(), ColorSpaceSRGB);
158             graphicsContext.setFillColor(lightBorderColor(), ColorSpaceDeviceRGB);
159             graphicsContext.fillPath(pathWithRoundedRect(outerPathRect, cornerRadius));
160         }
161
162         {
163             GraphicsContextStateSaver stateSaver(graphicsContext);
164             graphicsContext.clip(pathWithRoundedRect(innerPathRect, cornerRadius));
165             RefPtr<Gradient> gradient = Gradient::create(FloatPoint(innerPathRect.x(), innerPathRect.y()), FloatPoint(innerPathRect.x(), innerPathRect.maxY()));
166             gradient->addColorStop(0, gradientLightColor());
167             gradient->addColorStop(1, gradientDarkColor());
168             graphicsContext.setFillGradient(gradient);
169             graphicsContext.fillRect(outerPathRect);
170         }
171
172         {
173             GraphicsContextStateSaver stateSaver(graphicsContext);
174             graphicsContext.translate(FloatSize(roundf(leftBorderThickness), roundf(topBorderThickness)));
175
176             IntRect contentImageRect = enclosingIntRect(m_textRectsInSelectionRectCoordinates[i]);
177             m_contentImage->paint(graphicsContext, m_contentImageScaleFactor, contentImageRect.location(), contentImageRect);
178         }
179     }
180 }
181
182 } // namespace WebKit