| // Copyright 2016 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 "components/remote_cocoa/app_shim/views_scrollbar_bridge.h" |
| |
| #import "base/mac/sdk_forward_declarations.h" |
| |
| @interface ViewsScrollbarBridge () |
| |
| // Called when we receive a NSPreferredScrollerStyleDidChangeNotification. |
| - (void)onScrollerStyleChanged:(NSNotification*)notification; |
| |
| @end |
| |
| @implementation ViewsScrollbarBridge |
| |
| - (instancetype)initWithDelegate:(ViewsScrollbarBridgeDelegate*)delegate { |
| if ((self = [super init])) { |
| delegate_ = delegate; |
| [[NSNotificationCenter defaultCenter] |
| addObserver:self |
| selector:@selector(onScrollerStyleChanged:) |
| name:NSPreferredScrollerStyleDidChangeNotification |
| object:nil]; |
| } |
| return self; |
| } |
| |
| - (void)dealloc { |
| DCHECK(!delegate_); |
| [super dealloc]; |
| } |
| |
| - (void)clearDelegate { |
| delegate_ = nullptr; |
| [[NSNotificationCenter defaultCenter] removeObserver:self]; |
| } |
| |
| - (void)onScrollerStyleChanged:(NSNotification*)notification { |
| if (delegate_) |
| delegate_->OnScrollerStyleChanged(); |
| } |
| |
| + (NSScrollerStyle)getPreferredScrollerStyle { |
| return [NSScroller preferredScrollerStyle]; |
| } |
| |
| @end |