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// Copyright 2013 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 "content/browser/theme_helper_mac.h"
#import <Cocoa/Cocoa.h>
#include "base/command_line.h"
#include "base/mac/sdk_forward_declarations.h"
#include "content/common/view_messages.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/notification_service.h"
#include "content/public/browser/notification_types.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/common/content_switches.h"
// Declare notification names from the 10.7 SDK.
#if !defined(MAC_OS_X_VERSION_10_7) || \
MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_7
NSString* NSPreferredScrollerStyleDidChangeNotification =
@"NSPreferredScrollerStyleDidChangeNotification";
#endif
@interface ScrollbarPrefsObserver : NSObject
+ (void)registerAsObserver;
+ (void)appearancePrefsChanged:(NSNotification*)notification;
+ (void)behaviorPrefsChanged:(NSNotification*)notification;
+ (void)notifyPrefsChangedWithRedraw:(BOOL)redraw;
@end
@implementation ScrollbarPrefsObserver
+ (void)registerAsObserver {
[[NSDistributedNotificationCenter defaultCenter]
addObserver:self
selector:@selector(appearancePrefsChanged:)
name:@"AppleAquaScrollBarVariantChanged"
object:nil
suspensionBehavior:NSNotificationSuspensionBehaviorDeliverImmediately];
[[NSDistributedNotificationCenter defaultCenter]
addObserver:self
selector:@selector(behaviorPrefsChanged:)
name:@"AppleNoRedisplayAppearancePreferenceChanged"
object:nil
suspensionBehavior:NSNotificationSuspensionBehaviorCoalesce];
// In single-process mode, renderers will catch these notifications
// themselves and listening for them here may trigger the DCHECK in Observe().
if ([NSScroller respondsToSelector:@selector(preferredScrollerStyle)] &&
!CommandLine::ForCurrentProcess()->HasSwitch(switches::kSingleProcess)) {
[[NSNotificationCenter defaultCenter]
addObserver:self
selector:@selector(behaviorPrefsChanged:)
name:NSPreferredScrollerStyleDidChangeNotification
object:nil];
}
}
+ (void)appearancePrefsChanged:(NSNotification*)notification {
[self notifyPrefsChangedWithRedraw:YES];
}
+ (void)behaviorPrefsChanged:(NSNotification*)notification {
[self notifyPrefsChangedWithRedraw:NO];
}
+ (void)notifyPrefsChangedWithRedraw:(BOOL)redraw {
DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
NSUserDefaults* defaults = [NSUserDefaults standardUserDefaults];
[defaults synchronize];
content::ThemeHelperMac::SendThemeChangeToAllRenderers(
[defaults floatForKey:@"NSScrollerButtonDelay"],
[defaults floatForKey:@"NSScrollerButtonPeriod"],
[defaults boolForKey:@"AppleScrollerPagingBehavior"],
content::ThemeHelperMac::GetPreferredScrollerStyle(),
redraw);
}
@end
namespace content {
// static
ThemeHelperMac* ThemeHelperMac::GetInstance() {
return Singleton<ThemeHelperMac,
LeakySingletonTraits<ThemeHelperMac> >::get();
}
// static
blink::ScrollerStyle ThemeHelperMac::GetPreferredScrollerStyle() {
if (![NSScroller respondsToSelector:@selector(preferredScrollerStyle)])
return blink::ScrollerStyleLegacy;
return static_cast<blink::ScrollerStyle>([NSScroller preferredScrollerStyle]);
}
// static
void ThemeHelperMac::SendThemeChangeToAllRenderers(
float initial_button_delay,
float autoscroll_button_delay,
bool jump_on_track_click,
blink::ScrollerStyle preferred_scroller_style,
bool redraw) {
for (RenderProcessHost::iterator it(RenderProcessHost::AllHostsIterator());
!it.IsAtEnd();
it.Advance()) {
it.GetCurrentValue()->Send(new ViewMsg_UpdateScrollbarTheme(
initial_button_delay,
autoscroll_button_delay,
jump_on_track_click,
preferred_scroller_style,
redraw));
}
}
ThemeHelperMac::ThemeHelperMac() {
[ScrollbarPrefsObserver registerAsObserver];
registrar_.Add(this,
NOTIFICATION_RENDERER_PROCESS_CREATED,
NotificationService::AllSources());
}
ThemeHelperMac::~ThemeHelperMac() {
}
void ThemeHelperMac::Observe(int type,
const NotificationSource& source,
const NotificationDetails& details) {
DCHECK_EQ(NOTIFICATION_RENDERER_PROCESS_CREATED, type);
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
NSUserDefaults* defaults = [NSUserDefaults standardUserDefaults];
[defaults synchronize];
RenderProcessHost* rph = Source<RenderProcessHost>(source).ptr();
rph->Send(new ViewMsg_UpdateScrollbarTheme(
[defaults floatForKey:@"NSScrollerButtonDelay"],
[defaults floatForKey:@"NSScrollerButtonPeriod"],
[defaults boolForKey:@"AppleScrollerPagingBehavior"],
GetPreferredScrollerStyle(),
false));
}
} // namespace content
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