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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.
#import "chrome/browser/ui/cocoa/custom_frame_view.h"
#import <Carbon/Carbon.h>
#include <crt_externs.h>
#import <objc/runtime.h>
#include <string.h>
#include "base/logging.h"
#include "base/mac/mac_util.h"
#include "base/mac/scoped_nsautorelease_pool.h"
namespace {
BOOL gCanDrawTitle = NO;
BOOL gCanGetCornerRadius = NO;
} // namespace
@interface NSView (Swizzles)
- (void)drawRectOriginal:(NSRect)rect;
- (NSPoint)_fullScreenButtonOriginOriginal;
@end
@interface NSWindow (FramedBrowserWindow)
- (NSPoint)fullScreenButtonOriginAdjustment;
@end
@implementation NSWindow (CustomFrameView)
- (void)drawCustomFrameRect:(NSRect)rect forView:(NSView*)view {
[view drawRectOriginal:rect];
}
@end
@interface CustomFrameView : NSView
@end
@implementation CustomFrameView
// This is where we swizzle drawRect, and add in two methods that we
// need. If any of these fail it shouldn't affect the functionality of the
// others. If they all fail, we will lose window frame theming and
// roll overs for our close widgets, but things should still function
// correctly.
+ (void)load {
// Swizzling should only happen in the browser process. Interacting with
// AppKit will run +[borderViewClass initialize] in the renderer, which
// may establish Mach IPC with com.apple.windowserver.
// Note that CommandLine has not been initialized yet, since this is running
// as a module initializer.
const char* const* const argv = *_NSGetArgv();
const int argc = *_NSGetArgc();
const char kType[] = "--type=";
for (int i = 1; i < argc; ++i) {
const char* arg = argv[i];
if (strncmp(arg, kType, strlen(kType)) == 0)
return;
}
base::mac::ScopedNSAutoreleasePool pool;
// On 10.8+ the background for textured windows are no longer drawn by
// NSGrayFrame, and NSThemeFrame is used instead <http://crbug.com/114745>.
Class borderViewClass = NSClassFromString(
base::mac::IsOSMountainLionOrLater() ? @"NSThemeFrame" : @"NSGrayFrame");
DCHECK(borderViewClass);
if (!borderViewClass) return;
// Exchange draw rect.
Method m0 = class_getInstanceMethod([self class], @selector(drawRect:));
DCHECK(m0);
if (m0) {
BOOL didAdd = class_addMethod(borderViewClass,
@selector(drawRectOriginal:),
method_getImplementation(m0),
method_getTypeEncoding(m0));
DCHECK(didAdd);
if (didAdd) {
Method m1 = class_getInstanceMethod(borderViewClass,
@selector(drawRect:));
Method m2 = class_getInstanceMethod(borderViewClass,
@selector(drawRectOriginal:));
DCHECK(m1 && m2);
if (m1 && m2) {
method_exchangeImplementations(m1, m2);
}
}
}
// In Yosemite, the fullscreen button replaces the zoom button. We no longer
// need to swizzle out this AppKit private method.
if (base::mac::IsOSMavericksOrEarlier()) {
// Swizzle the method that sets the origin for the Lion fullscreen button.
// Do nothing if it cannot be found.
m0 = class_getInstanceMethod([self class],
@selector(_fullScreenButtonOrigin));
if (m0) {
BOOL didAdd = class_addMethod(borderViewClass,
@selector(_fullScreenButtonOriginOriginal),
method_getImplementation(m0),
method_getTypeEncoding(m0));
if (didAdd) {
Method m1 = class_getInstanceMethod(borderViewClass,
@selector(_fullScreenButtonOrigin));
Method m2 = class_getInstanceMethod(
borderViewClass, @selector(_fullScreenButtonOriginOriginal));
if (m1 && m2) {
method_exchangeImplementations(m1, m2);
}
}
}
}
}
+ (BOOL)canDrawTitle {
return gCanDrawTitle;
}
+ (BOOL)canGetCornerRadius {
return gCanGetCornerRadius;
}
- (id)initWithFrame:(NSRect)frame {
// This class is not for instantiating.
[self doesNotRecognizeSelector:_cmd];
return nil;
}
- (id)initWithCoder:(NSCoder*)coder {
// This class is not for instantiating.
[self doesNotRecognizeSelector:_cmd];
return nil;
}
// Here is our custom drawing for our frame.
- (void)drawRect:(NSRect)rect {
// Delegate drawing to the window, whose default implementation (above) is to
// call into the original implementation.
[[self window] drawCustomFrameRect:rect forView:self];
}
// Override to move the fullscreen button to the left of the profile avatar.
- (NSPoint)_fullScreenButtonOrigin {
NSWindow* window = [self window];
NSPoint offset = NSZeroPoint;
if ([window respondsToSelector:@selector(fullScreenButtonOriginAdjustment)])
offset = [window fullScreenButtonOriginAdjustment];
NSPoint origin = [self _fullScreenButtonOriginOriginal];
origin.x += offset.x;
origin.y += offset.y;
return origin;
}
@end
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