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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 #ifndef CONTENT_PUBLIC_BROWSER_ANDROID_SYNCHRONOUS_COMPOSITOR_CLIENT_H_
      6 #define CONTENT_PUBLIC_BROWSER_ANDROID_SYNCHRONOUS_COMPOSITOR_CLIENT_H_
      7 
      8 #include "base/basictypes.h"
      9 #include "ui/gfx/geometry/size_f.h"
     10 #include "ui/gfx/vector2d_f.h"
     11 
     12 namespace content {
     13 
     14 class SynchronousCompositor;
     15 
     16 class SynchronousCompositorClient {
     17  public:
     18   // Indication to the client that |compositor| is now initialized on the
     19   // compositor thread, and open for business.
     20   virtual void DidInitializeCompositor(SynchronousCompositor* compositor) = 0;
     21 
     22   // Indication to the client that |compositor| is going out of scope, and
     23   // must not be accessed within or after this call.
     24   // NOTE if the client goes away before the compositor it must call
     25   // SynchronousCompositor::SetClient(NULL) to release the back pointer.
     26   virtual void DidDestroyCompositor(SynchronousCompositor* compositor) = 0;
     27 
     28   // See LayerScrollOffsetDelegate for details.
     29   virtual gfx::Vector2dF GetTotalRootLayerScrollOffset() = 0;
     30   virtual void UpdateRootLayerState(const gfx::Vector2dF& total_scroll_offset,
     31                                     const gfx::Vector2dF& max_scroll_offset,
     32                                     const gfx::SizeF& scrollable_size,
     33                                     float page_scale_factor,
     34                                     float min_page_scale_factor,
     35                                     float max_page_scale_factor) = 0;
     36   virtual bool IsExternalFlingActive() const = 0;
     37 
     38   virtual void DidOverscroll(gfx::Vector2dF accumulated_overscroll,
     39                              gfx::Vector2dF latest_overscroll_delta,
     40                              gfx::Vector2dF current_fling_velocity) = 0;
     41 
     42   // When true, should periodically call
     43   // SynchronousCompositorOutputSurface::DemandDrawHw. Note that this value
     44   // can change inside DemandDrawHw call.
     45   virtual void SetContinuousInvalidate(bool invalidate) = 0;
     46 
     47   virtual void DidUpdateContent() = 0;
     48 
     49  protected:
     50   SynchronousCompositorClient() {}
     51   virtual ~SynchronousCompositorClient() {}
     52 
     53  private:
     54   DISALLOW_COPY_AND_ASSIGN(SynchronousCompositorClient);
     55 };
     56 
     57 }  // namespace content
     58 
     59 #endif  // CONTENT_PUBLIC_BROWSER_ANDROID_SYNCHRONOUS_COMPOSITOR_CLIENT_H_
     60