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// Copyright (c) 2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#import "chrome/browser/cocoa/tab_cell.h"
#import "third_party/GTM/AppKit/GTMTheme.h"
#import "third_party/GTM/AppKit/GTMNSColor+Luminance.h"
#define INSET_MULTIPLIER 2.0/3.0
#define CP1_MULTIPLIER 1.0/3.0
#define CP2_MULTIPLIER 3.0/8.0
namespace {
NSGradient *getGradientForStyle(bool selected, bool active) {
// Workaround for
// rdar://6857649 - NSGradient fails when using LAB Colorspace
// Once that's fixed we can remove this function and just call through
// to -[GTMTheme gradientForStyle:active:] directly with
// GTMThemeStyleTabBarSelected/GTMThemeStyleTabBarDeselected
NSUInteger startHighlight, endHighlight;
if (selected) {
startHighlight = GTMColorationLightHighlight;
endHighlight = GTMColorationLightMidtone;
} else {
startHighlight = GTMColorationBaseShadow;
endHighlight = GTMColorationBaseShadow;
}
NSColor *backgroundColor = [[GTMTheme defaultTheme] backgroundColor];
NSColor *startColor = [backgroundColor gtm_colorAdjustedFor:startHighlight
faded:!active];
NSColor *endColor = [backgroundColor gtm_colorAdjustedFor:endHighlight
faded:!active];
NSColorSpace *genericRGB = [NSColorSpace genericRGBColorSpace];
startColor = [startColor colorUsingColorSpace:genericRGB];
endColor = [endColor colorUsingColorSpace:genericRGB];
return [[[NSGradient alloc] initWithStartingColor:startColor
endingColor:endColor]
autorelease];
}
} // namespace
@implementation TabCell
- (id)initTextCell:(NSString *)aString {
self = [super initTextCell:aString];
if (self != nil) {
// nothing for now...
}
return self;
}
- (NSBackgroundStyle)interiorBackgroundStyle {
return [[GTMTheme defaultTheme]
interiorBackgroundStyleForStyle:GTMThemeStyleTabBarSelected
active:YES];
}
// Override drawing the button so that it looks like a Chromium tab instead
// of just a normal MacOS button.
- (void)drawWithFrame:(NSRect)cellFrame inView:(NSView *)controlView {
[[NSGraphicsContext currentContext] saveGraphicsState];
NSRect rect = cellFrame;
BOOL active =
[[controlView window] isKeyWindow] || [[controlView window] isMainWindow];
BOOL selected = [(NSButton *)controlView state];
// Inset by 0.5 in order to draw on pixels rather than on borders (which would
// cause blurry pixels). Decrease height by 1 in order to move away from the
// edge for the dark shadow.
rect = NSInsetRect(rect, 0.5, selected ? 0 : -0.5);
rect.size.height -= 1;
rect.origin.y += 1;
NSPoint bottomLeft = NSMakePoint(NSMinX(rect), NSMaxY(rect));
NSPoint bottomRight = NSMakePoint(NSMaxX(rect), NSMaxY(rect));
NSPoint topRight =
NSMakePoint(NSMaxX(rect) - INSET_MULTIPLIER * NSHeight(rect),
NSMinY(rect));
NSPoint topLeft =
NSMakePoint(NSMinX(rect) + INSET_MULTIPLIER * NSHeight(rect),
NSMinY(rect));
float baseControlPointOutset = NSHeight(rect) * CP1_MULTIPLIER;
float bottomControlPointInset = NSHeight(rect) * CP2_MULTIPLIER;
// Outset many of these values by 1 to cause the fill to bleed outside the
// clip area
NSBezierPath *path = [NSBezierPath bezierPath];
[path moveToPoint:NSMakePoint(bottomLeft.x - 1, bottomLeft.y + 1)];
[path lineToPoint:NSMakePoint(bottomLeft.x - 1, bottomLeft.y)];
[path lineToPoint:bottomLeft];
[path curveToPoint:topLeft
controlPoint1:NSMakePoint(bottomLeft.x + baseControlPointOutset,
bottomLeft.y)
controlPoint2:NSMakePoint(topLeft.x - bottomControlPointInset,
topLeft.y)];
[path lineToPoint:topRight];
[path curveToPoint:bottomRight
controlPoint1:NSMakePoint(topRight.x + bottomControlPointInset,
topRight.y)
controlPoint2:NSMakePoint(bottomRight.x - baseControlPointOutset,
bottomRight.y)];
[path lineToPoint:NSMakePoint(bottomRight.x + 1, bottomRight.y)];
[path lineToPoint:NSMakePoint(bottomRight.x + 1, bottomRight.y + 1)];
NSGradient *gradient = nil;
if (selected) {
gradient = getGradientForStyle(true, active);
// Stroke with a translucent black
[[NSColor colorWithCalibratedWhite:0.0 alpha:active ? 0.5 : 0.3] set];
[[NSGraphicsContext currentContext] saveGraphicsState];
NSShadow *shadow = [[[NSShadow alloc] init] autorelease];
[shadow setShadowOffset:NSMakeSize(2, -1)];
[shadow setShadowBlurRadius:2.0];
[path fill];
[[NSGraphicsContext currentContext] restoreGraphicsState];
} else {
gradient = getGradientForStyle(false, active);
// Stroke with a translucent black
[[NSColor colorWithCalibratedWhite:0.0 alpha:active ? 0.3 : 0.1] set];
}
[[NSGraphicsContext currentContext] saveGraphicsState];
[[NSBezierPath bezierPathWithRect:NSOffsetRect(cellFrame, 0, -1)] addClip];
[[NSColor colorWithCalibratedWhite:0.0 alpha:0.2] set];
[path setLineWidth:selected ? 2.0 : 1.0];
[path stroke];
[[NSGraphicsContext currentContext] restoreGraphicsState];
[gradient drawInBezierPath:path angle:90.0];
if (!selected) {
[path addClip];
NSRect borderRect, contentRect;
NSDivideRect(rect, &borderRect, &contentRect, 1, NSMaxYEdge);
[[NSColor colorWithCalibratedWhite:0.0 alpha:0.4] set];
NSRectFillUsingOperation(borderRect, NSCompositeSourceOver);
}
[[NSGraphicsContext currentContext] restoreGraphicsState];
// Inset where the text and favicon are drawn to keep them away from the
// sloping edges of the tab and the close box.
int kInteriorInset = cellFrame.size.height / 2.0;
NSRect frame = NSInsetRect(cellFrame, kInteriorInset, 0);
frame.size.width -= 16; // Inset for close box
[self drawInteriorWithFrame:frame
inView:controlView];
}
- (void)highlight:(BOOL)flag
withFrame:(NSRect)cellFrame
inView:(NSView *)controlView {
// Don't do normal highlighting
}
@end
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