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/*
* Copyright (C) 2010 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "WebThemeEngineDRTMac.h"
#include "skia/ext/skia_utils_mac.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebCanvas.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebRect.h"
#import <AppKit/NSAffineTransform.h>
#import <AppKit/NSGraphicsContext.h>
#import <AppKit/NSScroller.h>
#import <AppKit/NSWindow.h>
#include <Carbon/Carbon.h>
using WebKit::WebCanvas;
using WebKit::WebRect;
using WebKit::WebThemeEngine;
// We can't directly tell the NSScroller to draw itself as active or inactive,
// instead we have to make it a child of an (in)active window. This class lets
// us fake that parent window.
@interface FakeActiveWindow : NSWindow {
@private
BOOL hasActiveControls;
}
+ (NSWindow*)alwaysActiveWindow;
+ (NSWindow*)alwaysInactiveWindow;
- (id)initWithActiveControls:(BOOL)_hasActiveControls;
- (BOOL)_hasActiveControls;
@end
@implementation FakeActiveWindow
static NSWindow* alwaysActiveWindow = nil;
static NSWindow* alwaysInactiveWindow = nil;
+ (NSWindow*)alwaysActiveWindow
{
if (alwaysActiveWindow == nil)
alwaysActiveWindow = [[self alloc] initWithActiveControls:YES];
return alwaysActiveWindow;
}
+ (NSWindow*)alwaysInactiveWindow
{
if (alwaysInactiveWindow == nil)
alwaysInactiveWindow = [[self alloc] initWithActiveControls:NO];
return alwaysInactiveWindow;
}
- (id)initWithActiveControls:(BOOL)_hasActiveControls
{
self = [super init];
hasActiveControls = _hasActiveControls;
return self;
}
- (BOOL)_hasActiveControls
{
return hasActiveControls;
}
@end
void WebThemeEngineDRTMac::paintScrollbarThumb(
WebCanvas* canvas,
WebThemeEngine::State state,
WebThemeEngine::Size size,
const WebRect& rect,
const WebThemeEngine::ScrollbarInfo& scrollbarInfo)
{
// To match the Mac port, we still use HITheme for inner scrollbars.
if (scrollbarInfo.parent == WebThemeEngine::ScrollbarParentRenderLayer)
paintHIThemeScrollbarThumb(canvas, state, size, rect, scrollbarInfo);
else
paintNSScrollerScrollbarThumb(canvas, state, size, rect, scrollbarInfo);
}
static ThemeTrackEnableState stateToHIEnableState(WebThemeEngine::State state)
{
switch (state) {
case WebThemeEngine::StateDisabled:
return kThemeTrackDisabled;
case WebThemeEngine::StateInactive:
return kThemeTrackInactive;
default:
return kThemeTrackActive;
}
}
// Duplicated from webkit/glue/webthemeengine_impl_mac.cc in the downstream
// Chromium WebThemeEngine implementation.
void WebThemeEngineDRTMac::paintHIThemeScrollbarThumb(
WebCanvas* canvas,
WebThemeEngine::State state,
WebThemeEngine::Size size,
const WebRect& rect,
const WebThemeEngine::ScrollbarInfo& scrollbarInfo)
{
HIThemeTrackDrawInfo trackInfo;
trackInfo.version = 0;
trackInfo.kind = size == WebThemeEngine::SizeRegular ? kThemeMediumScrollBar : kThemeSmallScrollBar;
trackInfo.bounds = CGRectMake(rect.x, rect.y, rect.width, rect.height);
trackInfo.min = 0;
trackInfo.max = scrollbarInfo.maxValue;
trackInfo.value = scrollbarInfo.currentValue;
trackInfo.trackInfo.scrollbar.viewsize = scrollbarInfo.visibleSize;
trackInfo.attributes = 0;
if (scrollbarInfo.orientation == WebThemeEngine::ScrollbarOrientationHorizontal)
trackInfo.attributes |= kThemeTrackHorizontal;
trackInfo.enableState = stateToHIEnableState(state);
trackInfo.trackInfo.scrollbar.pressState =
state == WebThemeEngine::StatePressed ? kThemeThumbPressed : 0;
trackInfo.attributes |= (kThemeTrackShowThumb | kThemeTrackHideTrack);
gfx::SkiaBitLocker bitLocker(canvas);
CGContextRef cgContext = bitLocker.cgContext();
HIThemeDrawTrack(&trackInfo, 0, cgContext, kHIThemeOrientationNormal);
}
void WebThemeEngineDRTMac::paintNSScrollerScrollbarThumb(
WebCanvas* canvas,
WebThemeEngine::State state,
WebThemeEngine::Size size,
const WebRect& rect,
const WebThemeEngine::ScrollbarInfo& scrollbarInfo)
{
[NSGraphicsContext saveGraphicsState];
NSScroller* scroller = [[NSScroller alloc] initWithFrame:NSMakeRect(rect.x, rect.y, rect.width, rect.height)];
[scroller setEnabled:state != WebThemeEngine::StateDisabled];
if (state == WebThemeEngine::StateInactive)
[[[FakeActiveWindow alwaysInactiveWindow] contentView] addSubview:scroller];
else
[[[FakeActiveWindow alwaysActiveWindow] contentView] addSubview:scroller];
[scroller setControlSize:size == WebThemeEngine::SizeRegular ? NSRegularControlSize : NSSmallControlSize];
double value = double(scrollbarInfo.currentValue) / double(scrollbarInfo.maxValue);
[scroller setDoubleValue: value];
float knobProportion = float(scrollbarInfo.visibleSize) / float(scrollbarInfo.totalSize);
[scroller setKnobProportion: knobProportion];
gfx::SkiaBitLocker bitLocker(canvas);
CGContextRef cgContext = bitLocker.cgContext();
NSGraphicsContext* nsGraphicsContext = [NSGraphicsContext graphicsContextWithGraphicsPort:cgContext flipped:YES];
[NSGraphicsContext setCurrentContext:nsGraphicsContext];
// Despite passing in frameRect() to the scroller, it always draws at (0, 0).
// Force it to draw in the right location by translating the whole graphics
// context.
CGContextSaveGState(cgContext);
NSAffineTransform *transform = [NSAffineTransform transform];
[transform translateXBy:rect.x yBy:rect.y];
[transform concat];
[scroller drawKnob];
CGContextRestoreGState(cgContext);
[scroller release];
[NSGraphicsContext restoreGraphicsState];
}
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