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