1 // Copyright 2014 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 #ifndef CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_OVERSCROLL_ANIMATOR_SLIDER_MAC_H_ 6 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_OVERSCROLL_ANIMATOR_SLIDER_MAC_H_ 7 8 #import <Cocoa/Cocoa.h> 9 10 #include "base/mac/scoped_nsobject.h" 11 #include "base/memory/scoped_ptr.h" 12 #include "content/browser/web_contents/web_contents_view_overscroll_animator_mac.h" 13 14 namespace overscroll_animator { 15 class WebContentsPaintObserver; 16 } // namespace overscroll_animator 17 18 @interface OverscrollAnimatorSliderView 19 : NSView<WebContentsOverscrollAnimator> { 20 // This container view holds the RenderWidgetHost's NativeViews. Most of the 21 // time, its frame in screen coordinates is the same as SliderView's frame in 22 // screen coordinates. During an overscroll animation, it may temporarily be 23 // relocated, but it will return to its original position after the overscroll 24 // animation is finished. 25 base::scoped_nsobject<NSView> middleView_; 26 27 // This view is a sibling of middleView_, and is guaranteed to live below it. 28 // Most of the time, it is hidden. During a backwards overscroll animation, 29 // middleView_ is slid to the right, and bottomView_ peeks out from the 30 // original position of middleView_. 31 base::scoped_nsobject<NSImageView> bottomView_; 32 33 // This view is a sibling of middleView_, and is guaranteed to live above it. 34 // Most of the time, it is hidden. During a forwards overscroll animation, 35 // topView_ is slid to the left from off screen, its final position exactly 36 // covering middleView_. 37 base::scoped_nsobject<NSImageView> topView_; 38 39 // The direction of the current overscroll animation. This property has no 40 // meaning when inOverscroll_ is false. 41 content::OverscrollAnimatorDirection direction_; 42 43 // Indicates that this view is completing or cancelling the overscroll. This 44 // animation cannot be cancelled. 45 BOOL animating_; 46 47 // Reflects whether this view is in the process of handling an overscroll. 48 BOOL inOverscroll_; 49 50 // The most recent value passed to -updateOverscrollProgress:. 51 CGFloat progress_; 52 53 // An observer that reports the first non-empty paint of a WebContents. This 54 // is used when completing an overscroll animation. 55 scoped_ptr<overscroll_animator::WebContentsPaintObserver> observer_; 56 } 57 @end 58 59 #endif // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_VIEW_OVERSCROLL_ANIMATOR_SLIDER_MAC_H_ 60
