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      1 /*
      2  * Copyright (C) 2003, 2004, 2005, 2006 Apple Computer, 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 COMPUTER, 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 COMPUTER, 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 #import "config.h"
     27 #import "core/platform/graphics/mac/ColorMac.h"
     28 
     29 #import <wtf/RetainPtr.h>
     30 #import <wtf/StdLibExtras.h>
     31 
     32 namespace WebCore {
     33 
     34 // NSColor calls don't throw, so no need to block Cocoa exceptions in this file
     35 
     36 static bool useOldAquaFocusRingColor;
     37 
     38 RGBA32 oldAquaFocusRingColor()
     39 {
     40     return 0xFF7DADD9;
     41 }
     42 
     43 void setUsesTestModeFocusRingColor(bool newValue)
     44 {
     45     useOldAquaFocusRingColor = newValue;
     46 }
     47 
     48 bool usesTestModeFocusRingColor()
     49 {
     50     return useOldAquaFocusRingColor;
     51 }
     52 
     53 static RGBA32 makeRGBAFromNSColor(NSColor *c)
     54 {
     55     CGFloat redComponent;
     56     CGFloat greenComponent;
     57     CGFloat blueComponent;
     58     CGFloat alpha;
     59     [c getRed:&redComponent green:&greenComponent blue:&blueComponent alpha:&alpha];
     60 
     61     return makeRGBA(255 * redComponent, 255 * greenComponent, 255 * blueComponent, 255 * alpha);
     62 }
     63 
     64 Color colorFromNSColor(NSColor *c)
     65 {
     66     return Color(makeRGBAFromNSColor(c));
     67 }
     68 
     69 NSColor *nsColor(const Color& color)
     70 {
     71     RGBA32 c = color.rgb();
     72     switch (c) {
     73         case 0: {
     74             // Need this to avoid returning nil because cachedRGBAValues will default to 0.
     75             DEFINE_STATIC_LOCAL(RetainPtr<NSColor>, clearColor, ([NSColor colorWithDeviceRed:0 green:0 blue:0 alpha:0]));
     76             return clearColor.get();
     77         }
     78         case Color::black: {
     79             DEFINE_STATIC_LOCAL(RetainPtr<NSColor>, blackColor, ([NSColor colorWithDeviceRed:0 green:0 blue:0 alpha:1]));
     80             return blackColor.get();
     81         }
     82         case Color::white: {
     83             DEFINE_STATIC_LOCAL(RetainPtr<NSColor>, whiteColor, ([NSColor colorWithDeviceRed:1 green:1 blue:1 alpha:1]));
     84             return whiteColor.get();
     85         }
     86         default: {
     87             const int cacheSize = 32;
     88             static unsigned cachedRGBAValues[cacheSize];
     89             static RetainPtr<NSColor>* cachedColors = new RetainPtr<NSColor>[cacheSize];
     90 
     91             for (int i = 0; i != cacheSize; ++i) {
     92                 if (cachedRGBAValues[i] == c)
     93                     return cachedColors[i].get();
     94             }
     95 
     96             NSColor *result = [NSColor colorWithDeviceRed:static_cast<CGFloat>(color.red()) / 255
     97                                                     green:static_cast<CGFloat>(color.green()) / 255
     98                                                      blue:static_cast<CGFloat>(color.blue()) / 255
     99                                                     alpha:static_cast<CGFloat>(color.alpha()) / 255];
    100 
    101             static int cursor;
    102             cachedRGBAValues[cursor] = c;
    103             cachedColors[cursor] = result;
    104             if (++cursor == cacheSize)
    105                 cursor = 0;
    106             return result;
    107         }
    108     }
    109 }
    110 
    111 
    112 } // namespace WebCore
    113