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| 1 | +/* |
| 2 | + * Copyright (C) 2010 Google 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 are |
| 6 | + * met: |
| 7 | + * |
| 8 | + * * Redistributions of source code must retain the above copyright |
| 9 | + * notice, this list of conditions and the following disclaimer. |
| 10 | + * * Redistributions in binary form must reproduce the above |
| 11 | + * copyright notice, this list of conditions and the following disclaimer |
| 12 | + * in the documentation and/or other materials provided with the |
| 13 | + * distribution. |
| 14 | + * * Neither the name of Google Inc. nor the names of its |
| 15 | + * contributors may be used to endorse or promote products derived from |
| 16 | + * this software without specific prior written permission. |
| 17 | + * |
| 18 | + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 19 | + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 20 | + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 21 | + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 22 | + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 23 | + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 24 | + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 25 | + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 26 | + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 27 | + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 28 | + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 29 | + */ |
| 30 | + |
| 31 | +#include "WebThemeEngineDRTMac.h" |
| 32 | + |
| 33 | +#include "third_party/WebKit/WebKit/chromium/public/WebCanvas.h" |
| 34 | +#include "third_party/WebKit/WebKit/chromium/public/WebRect.h" |
| 35 | +#import <AppKit/NSAffineTransform.h> |
| 36 | +#import <AppKit/NSGraphicsContext.h> |
| 37 | +#import <AppKit/NSScroller.h> |
| 38 | +#import <AppKit/NSWindow.h> |
| 39 | +#include <Carbon/Carbon.h> |
| 40 | + |
| 41 | +using WebKit::WebCanvas; |
| 42 | +using WebKit::WebRect; |
| 43 | +using WebKit::WebThemeEngine; |
| 44 | + |
| 45 | +// We can't directly tell the NSScroller to draw itself as active or inactive, |
| 46 | +// instead we have to make it a child of an (in)active window. This class lets |
| 47 | +// us fake that parent window. |
| 48 | +@interface FakeActiveWindow : NSWindow { |
| 49 | +@private |
| 50 | + BOOL hasActiveControls; |
| 51 | +} |
| 52 | ++ (NSWindow*)alwaysActiveWindow; |
| 53 | ++ (NSWindow*)alwaysInactiveWindow; |
| 54 | +- (id)initWithActiveControls:(BOOL)_hasActiveControls; |
| 55 | +- (BOOL)_hasActiveControls; |
| 56 | +@end |
| 57 | + |
| 58 | +@implementation FakeActiveWindow |
| 59 | + |
| 60 | +static NSWindow* alwaysActiveWindow = nil; |
| 61 | +static NSWindow* alwaysInactiveWindow = nil; |
| 62 | + |
| 63 | ++ (NSWindow*)alwaysActiveWindow |
| 64 | +{ |
| 65 | + if (alwaysActiveWindow == nil) |
| 66 | + alwaysActiveWindow = [[self alloc] initWithActiveControls:YES]; |
| 67 | + return alwaysActiveWindow; |
| 68 | +} |
| 69 | + |
| 70 | ++ (NSWindow*)alwaysInactiveWindow |
| 71 | +{ |
| 72 | + if (alwaysInactiveWindow == nil) |
| 73 | + alwaysInactiveWindow = [[self alloc] initWithActiveControls:NO]; |
| 74 | + return alwaysInactiveWindow; |
| 75 | +} |
| 76 | + |
| 77 | +- (id)initWithActiveControls:(BOOL)_hasActiveControls |
| 78 | +{ |
| 79 | + self = [super init]; |
| 80 | + hasActiveControls = _hasActiveControls; |
| 81 | + return self; |
| 82 | +} |
| 83 | + |
| 84 | +- (BOOL)_hasActiveControls |
| 85 | +{ |
| 86 | + return hasActiveControls; |
| 87 | +} |
| 88 | + |
| 89 | +@end |
| 90 | + |
| 91 | +void WebThemeEngineDRTMac::paintScrollbarThumb( |
| 92 | + WebCanvas* canvas, |
| 93 | + WebThemeEngine::State state, |
| 94 | + WebThemeEngine::Size size, |
| 95 | + const WebRect& rect, |
| 96 | + const WebThemeEngine::ScrollbarInfo& scrollbarInfo) |
| 97 | +{ |
| 98 | + // To match the Mac port, we still use HITheme for inner scrollbars. |
| 99 | + if (scrollbarInfo.parent == WebThemeEngine::ScrollbarParentRenderLayer) |
| 100 | + paintHIThemeScrollbarThumb(canvas, state, size, rect, scrollbarInfo); |
| 101 | + else |
| 102 | + paintNSScrollerScrollbarThumb(canvas, state, size, rect, scrollbarInfo); |
| 103 | +} |
| 104 | + |
| 105 | +static ThemeTrackEnableState stateToHIEnableState(WebThemeEngine::State state) |
| 106 | +{ |
| 107 | + switch (state) { |
| 108 | + case WebThemeEngine::StateDisabled: |
| 109 | + return kThemeTrackDisabled; |
| 110 | + case WebThemeEngine::StateInactive: |
| 111 | + return kThemeTrackInactive; |
| 112 | + default: |
| 113 | + return kThemeTrackActive; |
| 114 | + } |
| 115 | +} |
| 116 | + |
| 117 | +// Duplicated from webkit/glue/webthemeengine_impl_mac.cc in the downstream |
| 118 | +// Chromium WebThemeEngine implementation. |
| 119 | +void WebThemeEngineDRTMac::paintHIThemeScrollbarThumb( |
| 120 | + WebCanvas* canvas, |
| 121 | + WebThemeEngine::State state, |
| 122 | + WebThemeEngine::Size size, |
| 123 | + const WebRect& rect, |
| 124 | + const WebThemeEngine::ScrollbarInfo& scrollbarInfo) |
| 125 | +{ |
| 126 | + HIThemeTrackDrawInfo trackInfo; |
| 127 | + trackInfo.version = 0; |
| 128 | + trackInfo.kind = size == WebThemeEngine::SizeRegular ? kThemeMediumScrollBar : kThemeSmallScrollBar; |
| 129 | + trackInfo.bounds = CGRectMake(rect.x, rect.y, rect.width, rect.height); |
| 130 | + trackInfo.min = 0; |
| 131 | + trackInfo.max = scrollbarInfo.maxValue; |
| 132 | + trackInfo.value = scrollbarInfo.currentValue; |
| 133 | + trackInfo.trackInfo.scrollbar.viewsize = scrollbarInfo.visibleSize; |
| 134 | + trackInfo.attributes = 0; |
| 135 | + if (scrollbarInfo.orientation == WebThemeEngine::ScrollbarOrientationHorizontal) |
| 136 | + trackInfo.attributes |= kThemeTrackHorizontal; |
| 137 | + |
| 138 | + trackInfo.enableState = stateToHIEnableState(state); |
| 139 | + |
| 140 | + trackInfo.trackInfo.scrollbar.pressState = |
| 141 | + state == WebThemeEngine::StatePressed ? kThemeThumbPressed : 0; |
| 142 | + trackInfo.attributes |= (kThemeTrackShowThumb | kThemeTrackHideTrack); |
| 143 | + HIThemeDrawTrack(&trackInfo, 0, canvas, kHIThemeOrientationNormal); |
| 144 | +} |
| 145 | + |
| 146 | +void WebThemeEngineDRTMac::paintNSScrollerScrollbarThumb( |
| 147 | + WebCanvas* canvas, |
| 148 | + WebThemeEngine::State state, |
| 149 | + WebThemeEngine::Size size, |
| 150 | + const WebRect& rect, |
| 151 | + const WebThemeEngine::ScrollbarInfo& scrollbarInfo) |
| 152 | +{ |
| 153 | + NSScroller* scroller = [[NSScroller alloc] initWithFrame:NSMakeRect(rect.x, rect.y, rect.width, rect.height)]; |
| 154 | + [scroller setEnabled:state != WebThemeEngine::StateDisabled]; |
| 155 | + if (state == WebThemeEngine::StateInactive) |
| 156 | + [[[FakeActiveWindow alwaysInactiveWindow] contentView] addSubview:scroller]; |
| 157 | + else |
| 158 | + [[[FakeActiveWindow alwaysActiveWindow] contentView] addSubview:scroller]; |
| 159 | + |
| 160 | + [scroller setControlSize:size == WebThemeEngine::SizeRegular ? NSRegularControlSize : NSSmallControlSize]; |
| 161 | + |
| 162 | + double value = double(scrollbarInfo.currentValue) / double(scrollbarInfo.maxValue); |
| 163 | + [scroller setDoubleValue: value]; |
| 164 | + |
| 165 | + float knobProportion = float(scrollbarInfo.visibleSize) / float(scrollbarInfo.totalSize); |
| 166 | + [scroller setKnobProportion: knobProportion]; |
| 167 | + |
| 168 | + NSGraphicsContext* previousGraphicsContext = [NSGraphicsContext currentContext]; |
| 169 | + NSGraphicsContext* nsGraphicsContext = [NSGraphicsContext graphicsContextWithGraphicsPort:canvas flipped:YES]; |
| 170 | + [NSGraphicsContext setCurrentContext:nsGraphicsContext]; |
| 171 | + |
| 172 | + // Despite passing in frameRect() to the scroller, it always draws at (0, 0). |
| 173 | + // Force it to draw in the right location by translating the whole graphics |
| 174 | + // context. |
| 175 | + [nsGraphicsContext saveGraphicsState]; |
| 176 | + NSAffineTransform *transform = [NSAffineTransform transform]; |
| 177 | + [transform translateXBy:rect.x yBy:rect.y]; |
| 178 | + [transform concat]; |
| 179 | + |
| 180 | + [scroller drawKnob]; |
| 181 | + |
| 182 | + [scroller release]; |
| 183 | + |
| 184 | + [nsGraphicsContext restoreGraphicsState]; |
| 185 | + [NSGraphicsContext setCurrentContext:previousGraphicsContext]; |
| 186 | +} |
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