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// Copyright (c) 2012 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.
#include "base/command_line.h"
#include "base/mac/mac_util.h"
#import "chrome/browser/ui/cocoa/nsview_additions.h"
#include "chrome/common/chrome_switches.h"
#include "ui/base/ui_base_switches.h"
#include "ui/gfx/scoped_ns_graphics_context_save_gstate_mac.h"
#include "base/logging.h"
#if !defined(MAC_OS_X_VERSION_10_7) || \
MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_7
@interface NSView (LionAPI)
- (NSSize)convertSizeFromBacking:(NSSize)size;
@end
#endif // 10.7
// Replicate specific 10.9 SDK declarations for building with prior SDKs.
#if !defined(MAC_OS_X_VERSION_10_9) || \
MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_9
@interface NSView (MavericksAPI)
// Flatten all child views that did not call setWantsLayer:YES into this
// view's CALayer.
- (void)setCanDrawSubviewsIntoLayer:(BOOL)flag;
@end
#endif // MAC_OS_X_VERSION_10_9
@implementation NSView (ChromeAdditions)
- (CGFloat)cr_lineWidth {
// All shipping retina macs run at least 10.7.
if (![self respondsToSelector:@selector(convertSizeFromBacking:)])
return 1;
return [self convertSizeFromBacking:NSMakeSize(1, 1)].width;
}
- (BOOL)cr_isMouseInView {
NSPoint mouseLoc = [[self window] mouseLocationOutsideOfEventStream];
mouseLoc = [[self superview] convertPoint:mouseLoc fromView:nil];
return [self hitTest:mouseLoc] == self;
}
- (BOOL)cr_isBelowView:(NSView*)otherView {
NSArray* subviews = [[self superview] subviews];
NSUInteger selfIndex = [subviews indexOfObject:self];
DCHECK_NE(NSNotFound, selfIndex);
NSUInteger otherIndex = [subviews indexOfObject:otherView];
DCHECK_NE(NSNotFound, otherIndex);
return selfIndex < otherIndex;
}
- (BOOL)cr_isAboveView:(NSView*)otherView {
return ![self cr_isBelowView:otherView];
}
- (void)cr_ensureSubview:(NSView*)subview
isPositioned:(NSWindowOrderingMode)place
relativeTo:(NSView *)otherView {
DCHECK(place == NSWindowAbove || place == NSWindowBelow);
BOOL isAbove = place == NSWindowAbove;
if ([[subview superview] isEqual:self] &&
[subview cr_isAboveView:otherView] == isAbove) {
return;
}
[subview removeFromSuperview];
[self addSubview:subview
positioned:place
relativeTo:otherView];
}
- (NSColor*)cr_keyboardFocusIndicatorColor {
return [[NSColor keyboardFocusIndicatorColor]
colorWithAlphaComponent:0.5 / [self cr_lineWidth]];
}
- (void)cr_recursivelySetNeedsDisplay:(BOOL)flag {
[self setNeedsDisplay:YES];
for (NSView* child in [self subviews])
[child cr_recursivelySetNeedsDisplay:flag];
}
- (void)cr_setWantsLayer:(BOOL)wantsLayer {
if (CommandLine::ForCurrentProcess()->HasSwitch(
switches::kDisableCoreAnimation))
return;
// Dynamically removing layers on SnowLeopard will sometimes result in
// crashes. Once a view has a layer on SnowLeopard, it is stuck with it.
// http://crbug.com/348328
if (!wantsLayer && base::mac::IsOSSnowLeopard())
return;
[self setWantsLayer:wantsLayer];
}
static NSView* g_ancestorBeingDrawnFrom = nil;
static NSView* g_childBeingDrawnTo = nil;
- (void)cr_drawUsingAncestor:(NSView*)ancestorView inRect:(NSRect)rect {
gfx::ScopedNSGraphicsContextSaveGState scopedGSState;
NSRect frame = [self convertRect:[self bounds] toView:ancestorView];
NSAffineTransform* transform = [NSAffineTransform transform];
if ([self isFlipped] == [ancestorView isFlipped]) {
[transform translateXBy:-NSMinX(frame) yBy:-NSMinY(frame)];
} else {
[transform translateXBy:-NSMinX(frame) yBy:NSMaxY(frame)];
[transform scaleXBy:1.0 yBy:-1.0];
}
[transform concat];
// This can be made robust to recursive calls, but is as of yet unneeded.
DCHECK(!g_ancestorBeingDrawnFrom && !g_childBeingDrawnTo);
g_ancestorBeingDrawnFrom = ancestorView;
g_childBeingDrawnTo = self;
[ancestorView drawRect:[ancestorView bounds]];
g_childBeingDrawnTo = nil;
g_ancestorBeingDrawnFrom = nil;
}
- (NSView*)cr_viewBeingDrawnTo {
if (!g_ancestorBeingDrawnFrom)
return self;
DCHECK(g_ancestorBeingDrawnFrom == self);
return g_childBeingDrawnTo;
}
@end
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