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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/mac_util.h"
#include "base/strings/sys_string_conversions.h"
#include "content/browser/renderer_host/render_process_host_impl.h"
#include "content/common/renderer.mojom.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"
using content::RenderProcessHost;
using content::RenderProcessHostImpl;
using content::ThemeHelperMac;
namespace {
blink::WebScrollbarButtonsPlacement GetButtonPlacement() {
NSString* scrollbar_variant = [[NSUserDefaults standardUserDefaults]
objectForKey:@"AppleScrollBarVariant"];
if ([scrollbar_variant isEqualToString:@"Single"])
return blink::kWebScrollbarButtonsPlacementSingle;
else if ([scrollbar_variant isEqualToString:@"DoubleMin"])
return blink::kWebScrollbarButtonsPlacementDoubleStart;
else if ([scrollbar_variant isEqualToString:@"DoubleBoth"])
return blink::kWebScrollbarButtonsPlacementDoubleBoth;
else
return blink::kWebScrollbarButtonsPlacementDoubleEnd;
}
void FillScrollbarThemeParams(
content::mojom::UpdateScrollbarThemeParams* params) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
NSUserDefaults* defaults = [NSUserDefaults standardUserDefaults];
[defaults synchronize];
params->initial_button_delay =
[defaults floatForKey:@"NSScrollerButtonDelay"];
params->autoscroll_button_delay =
[defaults floatForKey:@"NSScrollerButtonPeriod"];
params->jump_on_track_click =
[defaults boolForKey:@"AppleScrollerPagingBehavior"];
params->preferred_scroller_style =
ThemeHelperMac::GetPreferredScrollerStyle();
params->button_placement = GetButtonPlacement();
}
void SendSystemColorsChangedMessage(content::mojom::Renderer* renderer) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
NSUserDefaults* defaults = [NSUserDefaults standardUserDefaults];
[defaults synchronize];
renderer->OnSystemColorsChanged(
[[defaults stringForKey:@"AppleAquaColorVariant"] intValue],
base::SysNSStringToUTF8(
[defaults stringForKey:@"AppleHighlightedTextColor"]),
base::SysNSStringToUTF8(
[defaults stringForKey:@"AppleHighlightColor"]));
}
} // namespace
@interface ScrollbarPrefsObserver : NSObject
+ (void)registerAsObserver;
+ (void)appearancePrefsChanged:(NSNotification*)notification;
+ (void)behaviorPrefsChanged:(NSNotification*)notification;
+ (void)notifyPrefsChangedWithRedraw:(BOOL)redraw;
@end
@implementation ScrollbarPrefsObserver
+ (void)registerAsObserver {
NSDistributedNotificationCenter* distributedCenter =
[NSDistributedNotificationCenter defaultCenter];
[distributedCenter addObserver:self
selector:@selector(appearancePrefsChanged:)
name:@"AppleAquaScrollBarVariantChanged"
object:nil
suspensionBehavior:
NSNotificationSuspensionBehaviorDeliverImmediately];
[distributedCenter addObserver:self
selector:@selector(behaviorPrefsChanged:)
name:@"AppleNoRedisplayAppearancePreferenceChanged"
object:nil
suspensionBehavior:NSNotificationSuspensionBehaviorCoalesce];
[distributedCenter addObserver:self
selector:@selector(behaviorPrefsChanged:)
name:@"NSScrollAnimationEnabled"
object:nil
suspensionBehavior:NSNotificationSuspensionBehaviorCoalesce];
[distributedCenter addObserver:self
selector:@selector(appearancePrefsChanged:)
name:@"AppleScrollBarVariant"
object:nil
suspensionBehavior:
NSNotificationSuspensionBehaviorDeliverImmediately];
// In single-process mode, renderers will catch these notifications
// themselves and listening for them here may trigger the DCHECK in Observe().
if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
switches::kSingleProcess)) {
NSNotificationCenter* center = [NSNotificationCenter defaultCenter];
[center addObserver:self
selector:@selector(behaviorPrefsChanged:)
name:NSPreferredScrollerStyleDidChangeNotification
object:nil];
[center addObserver:self
selector:@selector(systemColorsChanged:)
name:NSSystemColorsDidChangeNotification
object:nil];
}
}
+ (void)appearancePrefsChanged:(NSNotification*)notification {
[self notifyPrefsChangedWithRedraw:YES];
}
+ (void)behaviorPrefsChanged:(NSNotification*)notification {
[self notifyPrefsChangedWithRedraw:NO];
}
+ (void)systemColorsChanged:(NSNotification*)notification {
for (RenderProcessHost::iterator it(RenderProcessHost::AllHostsIterator());
!it.IsAtEnd();
it.Advance()) {
SendSystemColorsChangedMessage(
it.GetCurrentValue()->GetRendererInterface());
}
}
+ (void)notifyPrefsChangedWithRedraw:(BOOL)redraw {
for (RenderProcessHost::iterator it(RenderProcessHost::AllHostsIterator());
!it.IsAtEnd();
it.Advance()) {
content::mojom::UpdateScrollbarThemeParamsPtr params =
content::mojom::UpdateScrollbarThemeParams::New();
FillScrollbarThemeParams(params.get());
params->redraw = redraw;
RenderProcessHostImpl* rphi =
static_cast<RenderProcessHostImpl*>(it.GetCurrentValue());
rphi->RecomputeAndUpdateWebKitPreferences();
rphi->GetRendererInterface()->UpdateScrollbarTheme(std::move(params));
}
}
@end
namespace content {
// static
ThemeHelperMac* ThemeHelperMac::GetInstance() {
return base::Singleton<ThemeHelperMac,
base::LeakySingletonTraits<ThemeHelperMac>>::get();
}
// static
blink::ScrollerStyle ThemeHelperMac::GetPreferredScrollerStyle() {
return static_cast<blink::ScrollerStyle>([NSScroller preferredScrollerStyle]);
}
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);
// When a new RenderProcess is created, send it the initial preference
// parameters.
content::mojom::UpdateScrollbarThemeParamsPtr params =
content::mojom::UpdateScrollbarThemeParams::New();
FillScrollbarThemeParams(params.get());
params->redraw = false;
RenderProcessHostImpl* rphi =
Source<content::RenderProcessHostImpl>(source).ptr();
rphi->RecomputeAndUpdateWebKitPreferences();
content::mojom::Renderer* renderer = rphi->GetRendererInterface();
renderer->UpdateScrollbarTheme(std::move(params));
SendSystemColorsChangedMessage(renderer);
}
} // namespace content
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