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      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, const ShareableBitmap::Handle& contentImageHandle)
     81 {
     82     RefPtr<ShareableBitmap> contentImage = ShareableBitmap::create(contentImageHandle);
     83     if (!contentImage)
     84         return 0;
     85     ASSERT(contentImage->size() == enclosingIntRect(selectionRectInWindowCoordinates).size());
     86 
     87     return adoptRef(new FindIndicator(selectionRectInWindowCoordinates, textRectsInSelectionRectCoordinates, contentImage.release()));
     88 }
     89 
     90 FindIndicator::FindIndicator(const WebCore::FloatRect& selectionRectInWindowCoordinates, const Vector<WebCore::FloatRect>& textRectsInSelectionRectCoordinates, PassRefPtr<ShareableBitmap> contentImage)
     91     : m_selectionRectInWindowCoordinates(selectionRectInWindowCoordinates)
     92     , m_textRectsInSelectionRectCoordinates(textRectsInSelectionRectCoordinates)
     93     , m_contentImage(contentImage)
     94 {
     95 }
     96 
     97 FindIndicator::~FindIndicator()
     98 {
     99 }
    100 
    101 static FloatRect inflateRect(const FloatRect& rect, float inflateX, float inflateY)
    102 {
    103     FloatRect inflatedRect = rect;
    104     inflatedRect.inflateX(inflateX);
    105     inflatedRect.inflateY(inflateY);
    106 
    107     return inflatedRect;
    108 }
    109 
    110 FloatRect FindIndicator::frameRect() const
    111 {
    112     return FloatRect(m_selectionRectInWindowCoordinates.x() - leftBorderThickness, m_selectionRectInWindowCoordinates.y() - topBorderThickness,
    113                      m_selectionRectInWindowCoordinates.width() + rightBorderThickness + leftBorderThickness,
    114                      m_selectionRectInWindowCoordinates.height() + topBorderThickness + bottomBorderThickness);
    115 }
    116 
    117 static Color lightBorderColor()
    118 {
    119     return Color(lightBorderRed, lightBorderGreen, lightBorderBlue, lightBorderAlpha);
    120 }
    121 
    122 static Color shadowColor()
    123 {
    124     return Color(shadowRed, shadowGreen, shadowBlue, shadowAlpha);
    125 }
    126 
    127 static Color gradientLightColor()
    128 {
    129     return Color(gradientLightRed, gradientLightGreen, gradientLightBlue, gradientLightAlpha);
    130 }
    131 
    132 static Color gradientDarkColor()
    133 {
    134     return Color(gradientDarkRed, gradientDarkGreen, gradientDarkBlue, gradientDarkAlpha);
    135 }
    136 
    137 static Path pathWithRoundedRect(const FloatRect& pathRect, float radius)
    138 {
    139     Path path;
    140     path.addRoundedRect(pathRect, FloatSize(radius, radius));
    141 
    142     return path;
    143 }
    144 
    145 void FindIndicator::draw(GraphicsContext& graphicsContext, const IntRect& dirtyRect)
    146 {
    147     for (size_t i = 0; i < m_textRectsInSelectionRectCoordinates.size(); ++i) {
    148         FloatRect textRect = m_textRectsInSelectionRectCoordinates[i];
    149         textRect.move(leftBorderThickness, topBorderThickness);
    150 
    151         graphicsContext.save();
    152         FloatRect outerPathRect = inflateRect(textRect, horizontalOutsetToCenterOfLightBorder, verticalOutsetToCenterOfLightBorder);
    153         graphicsContext.setShadow(FloatSize(shadowOffsetX, shadowOffsetY), shadowBlurRadius, shadowColor(), ColorSpaceSRGB);
    154         graphicsContext.setFillColor(lightBorderColor(), ColorSpaceDeviceRGB);
    155         graphicsContext.fillPath(pathWithRoundedRect(outerPathRect, cornerRadius));
    156         graphicsContext.restore();
    157 
    158         graphicsContext.save();
    159         FloatRect innerPathRect = inflateRect(textRect, horizontalPaddingInsideLightBorder, verticalPaddingInsideLightBorder);
    160         graphicsContext.clip(pathWithRoundedRect(innerPathRect, cornerRadius));
    161         RefPtr<Gradient> gradient = Gradient::create(FloatPoint(innerPathRect.x(), innerPathRect.y()), FloatPoint(innerPathRect.x(), innerPathRect.maxY()));
    162         gradient->addColorStop(0, gradientLightColor());
    163         gradient->addColorStop(1, gradientDarkColor());
    164         graphicsContext.setFillGradient(gradient);
    165         graphicsContext.fillRect(outerPathRect);
    166         graphicsContext.restore();
    167 
    168         graphicsContext.save();
    169         graphicsContext.translate(FloatSize(roundf(leftBorderThickness), roundf(topBorderThickness)));
    170         m_contentImage->paint(graphicsContext, IntPoint(0, 0), m_contentImage->bounds());
    171         graphicsContext.restore();
    172     }
    173 }
    174 
    175 } // namespace WebKit
    176