Chrome side of Pepper v2 scrollbar widget.

webkit/glue/plugins/pepper_widget.h

+// Copyright (c) 2010 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 WEBKIT_GLUE_PLUGINS_PEPPER_WIDGET_H_
+#define WEBKIT_GLUE_PLUGINS_PEPPER_WIDGET_H_
+
+#include "base/scoped_ptr.h"
+#include "third_party/ppapi/c/pp_rect.h"
+#include "webkit/glue/plugins/pepper_resource.h"
+
+typedef struct _ppb_Widget PPB_Widget;
+typedef struct _pp_Event PP_Event;
+
+namespace pepper {
+
+class ImageData;
+class PluginInstance;
+
+class Widget : public Resource  {
+ public:
+  explicit Widget(PluginInstance* instance);
+  virtual ~Widget();
+
+  // Returns a pointer to the interface implementing PPB_Widget that is
+  // exposed to the plugin.
+  static const PPB_Widget* GetInterface();
+
+  // Resource overrides.
+  Widget* AsWidget() { return this; }
+
+  // PPB_Widget implementation.
+  virtual bool Paint(const PP_Rect* rect, ImageData* image) = 0;
+  virtual bool HandleEvent(const PP_Event* event) = 0;
+  bool GetLocation(PP_Rect* location);
+  void SetLocation(const PP_Rect* location);
+
+  // Notifies the plugin instance that the given rect needs to be repainted.
+  void Invalidate(const PP_Rect* dirty);
+  PluginInstance* instance() { return instance_; }
+
+ protected:
+  virtual void SetLocationInternal(const PP_Rect* location) = 0;
+  PP_Rect location() const { return location_; }
+
+ private:
+  scoped_refptr<PluginInstance> instance_;
+  PP_Rect location_;
+};
+
+}  // namespace pepper
+
+#endif  // WEBKIT_GLUE_PLUGINS_PEPPER_WIDGET_H_