content/browser/android/composited_touch_handle_drawable.h

// Copyright 2014 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.

#ifndef CONTENT_BROWSER_ANDROID_COMPOSITED_TOUCH_HANDLE_DRAWABLE_H_
#define CONTENT_BROWSER_ANDROID_COMPOSITED_TOUCH_HANDLE_DRAWABLE_H_

#include "ui/touch_selection/touch_handle.h"

#include "base/android/jni_android.h"
#include "base/macros.h"
#include "cc/layers/ui_resource_layer.h"

namespace content {

// Touch handle drawable implementation backed by a cc layer.
class CompositedTouchHandleDrawable : public ui::TouchHandleDrawable {
 public:
  CompositedTouchHandleDrawable(cc::Layer* root_layer,
                                float dpi_scale,
                                jobject context);
  ~CompositedTouchHandleDrawable() override;

  // ui::TouchHandleDrawable implementation.
  void SetEnabled(bool enabled) override;
  void SetOrientation(ui::TouchHandleOrientation orientation,
                      bool mirror_vertical,
                      bool mirror_horizontal) override;
  void SetOrigin(const gfx::PointF& origin) override;
  void SetAlpha(float alpha) override;
  gfx::RectF GetVisibleBounds() const override;
  float GetDrawableHorizontalPaddingRatio() const override;

  static bool RegisterHandleViewResources(JNIEnv* env);

 private:
  void DetachLayer();
  void UpdateLayerPosition();

  const float dpi_scale_;
  float drawable_horizontal_padding_ratio_;
  ui::TouchHandleOrientation orientation_;
  gfx::PointF origin_position_;
  scoped_refptr<cc::UIResourceLayer> layer_;

  DISALLOW_COPY_AND_ASSIGN(CompositedTouchHandleDrawable);
};

}  // namespace content

#endif  // CONTENT_BROWSER_ANDROID_COMPOSITED_TOUCH_HANDLE_DRAWABLE_H_