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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/ui/cocoa/fast_resize_view.h"
#import <Cocoa/Cocoa.h>
#include "base/logging.h"
#include "base/command_line.h"
#include "base/mac/scoped_nsobject.h"
#include "ui/base/cocoa/animation_utils.h"
#include "ui/base/ui_base_switches.h"
@interface FastResizeView (PrivateMethods)
// Lays out this views subviews. If fast resize mode is on, does not resize any
// subviews and instead pegs them to the top left. If fast resize mode is off,
// sets the subviews' frame to be equal to this view's bounds.
- (void)layoutSubviews;
@end
@implementation FastResizeView
- (id)initWithFrame:(NSRect)frameRect {
if ((self = [super initWithFrame:frameRect])) {
if (!CommandLine::ForCurrentProcess()->HasSwitch(
switches::kDisableCoreAnimation)) {
ScopedCAActionDisabler disabler;
base::scoped_nsobject<CALayer> layer([[CALayer alloc] init]);
[layer setBackgroundColor:CGColorGetConstantColor(kCGColorWhite)];
[self setLayer:layer];
[self setWantsLayer:YES];
}
}
return self;
}
- (BOOL)isOpaque {
return YES;
}
- (void)setFastResizeMode:(BOOL)fastResizeMode {
if (fastResizeMode_ == fastResizeMode)
return;
fastResizeMode_ = fastResizeMode;
// Force a relayout when coming out of fast resize mode.
if (!fastResizeMode_)
[self layoutSubviews];
[self setNeedsDisplay:YES];
}
- (void)resizeSubviewsWithOldSize:(NSSize)oldSize {
[self layoutSubviews];
}
- (void)drawRect:(NSRect)dirtyRect {
// If we are in fast resize mode, our subviews may not completely cover our
// bounds, so we fill with white. If we are not in fast resize mode, we do
// not need to draw anything.
if (!fastResizeMode_)
return;
[[NSColor whiteColor] set];
NSRectFill(dirtyRect);
}
@end
@implementation FastResizeView (PrivateMethods)
- (void)layoutSubviews {
// There should never be more than one subview. There can be zero, if we are
// in the process of switching tabs or closing the window. In those cases, no
// layout is needed.
NSArray* subviews = [self subviews];
DCHECK([subviews count] <= 1);
if ([subviews count] < 1)
return;
NSView* subview = [subviews objectAtIndex:0];
NSRect bounds = [self bounds];
if (fastResizeMode_) {
NSRect frame = [subview frame];
frame.origin.x = 0;
frame.origin.y = NSHeight(bounds) - NSHeight(frame);
[subview setFrame:frame];
} else {
[subview setFrame:bounds];
}
}
@end
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