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1// Copyright 2013 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "content/browser/theme_helper_mac.h"
6
7#include <Foundation/Foundation.h>
8
9#include "content/common/view_messages.h"
10#include "content/public/browser/browser_thread.h"
11#include "content/public/browser/notification_service.h"
12#include "content/public/browser/notification_types.h"
13#include "content/public/browser/render_process_host.h"
14
15@interface ScrollbarPrefsObserver : NSObject
16
17+ (void)registerAsObserver;
18+ (void)appearancePrefsChanged:(NSNotification*)notification;
19+ (void)behaviorPrefsChanged:(NSNotification*)notification;
20+ (void)notifyPrefsChangedWithRedraw:(BOOL)redraw;
21
22@end
23
24@implementation ScrollbarPrefsObserver
25
26+ (void)registerAsObserver {
27  [[NSDistributedNotificationCenter defaultCenter]
28      addObserver:self
29         selector:@selector(appearancePrefsChanged:)
30             name:@"AppleAquaScrollBarVariantChanged"
31           object:nil
32suspensionBehavior:NSNotificationSuspensionBehaviorDeliverImmediately];
33
34  [[NSDistributedNotificationCenter defaultCenter]
35      addObserver:self
36         selector:@selector(behaviorPrefsChanged:)
37             name:@"AppleNoRedisplayAppearancePreferenceChanged"
38           object:nil
39suspensionBehavior:NSNotificationSuspensionBehaviorCoalesce];
40}
41
42+ (void)appearancePrefsChanged:(NSNotification*)notification {
43  [self notifyPrefsChangedWithRedraw:YES];
44}
45
46+ (void)behaviorPrefsChanged:(NSNotification*)notification {
47  [self notifyPrefsChangedWithRedraw:NO];
48}
49
50+ (void)notifyPrefsChangedWithRedraw:(BOOL)redraw {
51  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
52  NSUserDefaults* defaults = [NSUserDefaults standardUserDefaults];
53  [defaults synchronize];
54
55  content::ThemeHelperMac::SendThemeChangeToAllRenderers(
56      [defaults floatForKey:@"NSScrollerButtonDelay"],
57      [defaults floatForKey:@"NSScrollerButtonPeriod"],
58      [defaults boolForKey:@"AppleScrollerPagingBehavior"],
59      redraw);
60}
61
62@end
63
64namespace content {
65
66ThemeHelperMac::ThemeHelperMac() {
67  [ScrollbarPrefsObserver registerAsObserver];
68  registrar_.Add(this,
69                 NOTIFICATION_RENDERER_PROCESS_CREATED,
70                 NotificationService::AllSources());
71}
72
73ThemeHelperMac::~ThemeHelperMac() {
74}
75
76// static
77ThemeHelperMac* ThemeHelperMac::GetInstance() {
78  return Singleton<ThemeHelperMac,
79      LeakySingletonTraits<ThemeHelperMac> >::get();
80}
81
82
83void ThemeHelperMac::Observe(int type,
84                             const NotificationSource& source,
85                             const NotificationDetails& details) {
86  DCHECK_EQ(NOTIFICATION_RENDERER_PROCESS_CREATED, type);
87
88  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
89  NSUserDefaults* defaults = [NSUserDefaults standardUserDefaults];
90  [defaults synchronize];
91
92  RenderProcessHost* rph = Source<RenderProcessHost>(source).ptr();
93  rph->Send(new ViewMsg_UpdateScrollbarTheme(
94      [defaults floatForKey:@"NSScrollerButtonDelay"],
95      [defaults floatForKey:@"NSScrollerButtonPeriod"],
96      [defaults boolForKey:@"AppleScrollerPagingBehavior"],
97      false));
98}
99
100// static
101void ThemeHelperMac::SendThemeChangeToAllRenderers(
102    float initial_button_delay,
103    float autoscroll_button_delay,
104    bool jump_on_track_click,
105    bool redraw) {
106  for (RenderProcessHost::iterator it(RenderProcessHost::AllHostsIterator());
107       !it.IsAtEnd();
108       it.Advance()) {
109    it.GetCurrentValue()->Send(new ViewMsg_UpdateScrollbarTheme(
110        initial_button_delay,
111        autoscroll_button_delay,
112        jump_on_track_click,
113        redraw));
114  }
115}
116
117}  // namespace content
118