renderthemechromiummac.mm

linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自WebKit

/*
 * Copyright (C) 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
 * Copyright (C) 2008, 2009 Google, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

// FIXME: we still need to figure out if passing a null view to the cell
// drawing routines will work. I expect not, and if that's the case we'll have
// to figure out something else. For now, at least leave the lines commented
// in, but the procurement of the view if 0'd.

#import "config.h"
#import "RenderThemeChromiumMac.h"

#import <Carbon/Carbon.h>
#import <Cocoa/Cocoa.h>
#import <math.h>

#import "BitmapImage.h"
#import "CSSStyleSelector.h"
#import "CSSValueKeywords.h"
#import "Document.h"
#import "Element.h"
#import "FoundationExtras.h"
#import "FrameView.h"
#import "GraphicsContext.h"
#import "HTMLInputElement.h"
#import "HTMLMediaElement.h"
#import "HTMLNames.h"
#import "Image.h"
#import "LocalCurrentGraphicsContext.h"
#import "MediaControlElements.h"
#import "RenderSlider.h"
#import "RenderView.h"
#import "SharedBuffer.h"
#import "WebCoreSystemInterface.h"
#import <wtf/RetainPtr.h>

#ifdef BUILDING_ON_TIGER
typedef int NSInteger;
typedef unsigned NSUInteger;
#endif

using std::min;

// The methods in this file are specific to the Mac OS X platform.

// FIXME: The platform-independent code in this class should be factored out and merged with RenderThemeSafari. 

@interface WebCoreRenderThemeNotificationObserver : NSObject
{
    WebCore::RenderTheme *_theme;
}

- (id)initWithTheme:(WebCore::RenderTheme *)theme;
- (void)systemColorsDidChange:(NSNotification *)notification;

@end

@implementation WebCoreRenderThemeNotificationObserver

- (id)initWithTheme:(WebCore::RenderTheme *)theme
{
    [super init];
    _theme = theme;
    
    return self;
}

- (void)systemColorsDidChange:(NSNotification *)notification
{
    ASSERT([[notification name] isEqualToString:NSSystemColorsDidChangeNotification]);
    _theme->platformColorsDidChange();
}

@end

namespace WebCore {

using namespace HTMLNames;

enum {
    TopMargin,
    RightMargin,
    BottomMargin,
    LeftMargin
};

enum {
    TopPadding,
    RightPadding,
    BottomPadding,
    LeftPadding
};

// In our Mac port, we don't define PLATFORM(MAC) and thus don't pick up the
// |operator NSRect()| on WebCore::IntRect and FloatRect. This substitues for
// that missing conversion operator.
NSRect IntRectToNSRect(const IntRect & rect)
{
    return NSMakeRect(rect.x(), rect.y(), rect.width(), rect.height());
}

NSRect FloatRectToNSRect(const FloatRect & rect)
{
    return NSMakeRect(rect.x(), rect.y(), rect.width(), rect.height());
}

IntRect NSRectToIntRect(const NSRect & rect)
{
    return IntRect(rect.origin.x, rect.origin.y, rect.size.width, rect.size.height);
}

RenderTheme* theme()
{
    static RenderThemeChromiumMac* macTheme = new RenderThemeChromiumMac;
    return macTheme;
}

RenderThemeChromiumMac::RenderThemeChromiumMac()
    : m_isSliderThumbHorizontalPressed(false)
    , m_isSliderThumbVerticalPressed(false)
    , m_notificationObserver(AdoptNS, [[WebCoreRenderThemeNotificationObserver alloc] initWithTheme:this])
{
    [[NSNotificationCenter defaultCenter] addObserver:m_notificationObserver.get()
                                                        selector:@selector(systemColorsDidChange:)
                                                            name:NSSystemColorsDidChangeNotification
                                                          object:nil];
}

RenderThemeChromiumMac::~RenderThemeChromiumMac()
{
    [[NSNotificationCenter defaultCenter] removeObserver:m_notificationObserver.get()];
}

Color RenderThemeChromiumMac::platformActiveSelectionBackgroundColor() const
{
    NSColor* color = [[NSColor selectedTextBackgroundColor] colorUsingColorSpaceName:NSDeviceRGBColorSpace];
    return Color(static_cast<int>(255.0 * [color redComponent]), static_cast<int>(255.0 * [color greenComponent]), static_cast<int>(255.0 * [color blueComponent]));
}

Color RenderThemeChromiumMac::platformInactiveSelectionBackgroundColor() const
{
    NSColor* color = [[NSColor secondarySelectedControlColor] colorUsingColorSpaceName:NSDeviceRGBColorSpace];
    return Color(static_cast<int>(255.0 * [color redComponent]), static_cast<int>(255.0 * [color greenComponent]), static_cast<int>(255.0 * [color blueComponent]));
}

Color RenderThemeChromiumMac::activeListBoxSelectionBackgroundColor() const
{
    NSColor* color = [[NSColor alternateSelectedControlColor] colorUsingColorSpaceName:NSDeviceRGBColorSpace];
    return Color(static_cast<int>(255.0 * [color redComponent]), static_cast<int>(255.0 * [color greenComponent]), static_cast<int>(255.0 * [color blueComponent]));
}

static FontWeight toFontWeight(NSInteger appKitFontWeight)
{
    ASSERT(appKitFontWeight > 0 && appKitFontWeight < 15);
    if (appKitFontWeight > 14)
        appKitFontWeight = 14;
    else if (appKitFontWeight < 1)
        appKitFontWeight = 1;

    static FontWeight fontWeights[] = {
        FontWeight100,
        FontWeight100,
        FontWeight200,
        FontWeight300,
        FontWeight400,
        FontWeight500,
        FontWeight600,
        FontWeight600,
        FontWeight700,
        FontWeight800,
        FontWeight800,
        FontWeight900,
        FontWeight900,
        FontWeight900
    };
    return fontWeights[appKitFontWeight - 1];
}

void RenderThemeChromiumMac::systemFont(int cssValueId, Document* document, FontDescription& fontDescription) const
{
    static FontDescription systemFont;
    static FontDescription smallSystemFont;
    static FontDescription menuFont;
    static FontDescription labelFont;
    static FontDescription miniControlFont;
    static FontDescription smallControlFont;
    static FontDescription controlFont;

    FontDescription* cachedDesc;
    NSFont* font = nil;
    switch (cssValueId) {
    case CSSValueSmallCaption:
        cachedDesc = &smallSystemFont;
        if (!smallSystemFont.isAbsoluteSize())
            font = [NSFont systemFontOfSize:[NSFont smallSystemFontSize]];
        break;
    case CSSValueMenu:
        cachedDesc = &menuFont;
        if (!menuFont.isAbsoluteSize())
            font = [NSFont menuFontOfSize:[NSFont systemFontSize]];
        break;
    case CSSValueStatusBar:
        cachedDesc = &labelFont;
        if (!labelFont.isAbsoluteSize())
            font = [NSFont labelFontOfSize:[NSFont labelFontSize]];
        break;
    case CSSValueWebkitMiniControl:
        cachedDesc = &miniControlFont;
        if (!miniControlFont.isAbsoluteSize())
            font = [NSFont systemFontOfSize:[NSFont systemFontSizeForControlSize:NSMiniControlSize]];
        break;
    case CSSValueWebkitSmallControl:
        cachedDesc = &smallControlFont;
        if (!smallControlFont.isAbsoluteSize())
            font = [NSFont systemFontOfSize:[NSFont systemFontSizeForControlSize:NSSmallControlSize]];
        break;
    case CSSValueWebkitControl:
        cachedDesc = &controlFont;
        if (!controlFont.isAbsoluteSize())
            font = [NSFont systemFontOfSize:[NSFont systemFontSizeForControlSize:NSRegularControlSize]];
        break;
    default:
        cachedDesc = &systemFont;
        if (!systemFont.isAbsoluteSize())
            font = [NSFont systemFontOfSize:[NSFont systemFontSize]];
    }

    if (font) {
        NSFontManager *fontManager = [NSFontManager sharedFontManager];
        cachedDesc->setIsAbsoluteSize(true);
        cachedDesc->setGenericFamily(FontDescription::NoFamily);
        cachedDesc->firstFamily().setFamily([font familyName]);
        cachedDesc->setSpecifiedSize([font pointSize]);
        cachedDesc->setWeight(toFontWeight([fontManager weightOfFont:font]));
        cachedDesc->setItalic([fontManager traitsOfFont:font] & NSItalicFontMask);
    }
    fontDescription = *cachedDesc;
}

static RGBA32 convertNSColorToColor(NSColor *color)
{
    NSColor *colorInColorSpace = [color colorUsingColorSpaceName:NSCalibratedRGBColorSpace];
    if (colorInColorSpace) {
        static const double scaleFactor = nextafter(256.0, 0.0);
        return makeRGB(static_cast<int>(scaleFactor * [colorInColorSpace redComponent]),
            static_cast<int>(scaleFactor * [colorInColorSpace greenComponent]),
            static_cast<int>(scaleFactor * [colorInColorSpace blueComponent]));
    }

    // This conversion above can fail if the NSColor in question is an NSPatternColor 
    // (as many system colors are). These colors are actually a repeating pattern
    // not just a solid color. To work around this we simply draw a 1x1 image of
    // the color and use that pixel's color. It might be better to use an average of
    // the colors in the pattern instead.
    NSBitmapImageRep *offscreenRep = [[NSBitmapImageRep alloc] initWithBitmapDataPlanes:nil
                                                                             pixelsWide:1
                                                                             pixelsHigh:1
                                                                          bitsPerSample:8
                                                                        samplesPerPixel:4
                                                                               hasAlpha:YES
                                                                               isPlanar:NO
                                                                         colorSpaceName:NSCalibratedRGBColorSpace
                                                                            bytesPerRow:4
                                                                           bitsPerPixel:32];

    [NSGraphicsContext saveGraphicsState];
    [NSGraphicsContext setCurrentContext:[NSGraphicsContext graphicsContextWithBitmapImageRep:offscreenRep]];
    NSEraseRect(NSMakeRect(0, 0, 1, 1));
    [color drawSwatchInRect:NSMakeRect(0, 0, 1, 1)];
    [NSGraphicsContext restoreGraphicsState];

    NSUInteger pixel[4];
    [offscreenRep getPixel:pixel atX:0 y:0];

    [offscreenRep release];

    return makeRGB(pixel[0], pixel[1], pixel[2]);
}

static RGBA32 menuBackgroundColor()
{
    NSBitmapImageRep *offscreenRep = [[NSBitmapImageRep alloc] initWithBitmapDataPlanes:nil
                                                                             pixelsWide:1
                                                                             pixelsHigh:1
                                                                          bitsPerSample:8
                                                                        samplesPerPixel:4
                                                                               hasAlpha:YES
                                                                               isPlanar:NO
                                                                         colorSpaceName:NSCalibratedRGBColorSpace
                                                                            bytesPerRow:4
                                                                           bitsPerPixel:32];

    CGContextRef context = static_cast<CGContextRef>([[NSGraphicsContext graphicsContextWithBitmapImageRep:offscreenRep] graphicsPort]);
    CGRect rect = CGRectMake(0, 0, 1, 1);
    HIThemeMenuDrawInfo drawInfo;
    drawInfo.version =  0;
    drawInfo.menuType = kThemeMenuTypePopUp;
    HIThemeDrawMenuBackground(&rect, &drawInfo, context, kHIThemeOrientationInverted);

    NSUInteger pixel[4];
    [offscreenRep getPixel:pixel atX:0 y:0];

    [offscreenRep release];

    return makeRGB(pixel[0], pixel[1], pixel[2]);
}

void RenderThemeChromiumMac::platformColorsDidChange()
{