Chrome side of Pepper v2 scrollbar widget.

webkit/glue/plugins/pepper_scrollbar.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_SCROLLBAR_H_
+#define WEBKIT_GLUE_PLUGINS_PEPPER_SCROLLBAR_H_
+
+#include <vector>
+
+#include "gfx/rect.h"
+#include "third_party/ppapi/c/ppb_scrollbar.h"
+#include "third_party/WebKit/WebKit/chromium/public/WebRect.h"
+#include "third_party/WebKit/WebKit/chromium/public/WebScrollbarClient.h"
+#include "webkit/glue/plugins/pepper_widget.h"
+
+typedef struct _ppb_Scrollbar PPB_Scrollbar;
+
+namespace pepper {
+
+class PluginInstance;
+
+class Scrollbar : public Widget, public WebKit::WebScrollbarClient {
+ public:
+  Scrollbar(PluginInstance* instance, bool vertical);
+  virtual ~Scrollbar();
+
+  // Returns a pointer to the interface implementing PPB_Scrollbar that is
+  // exposed to the plugin.
+  static const PPB_Scrollbar* GetInterface();
+
+  // Resource overrides.
+  Scrollbar* AsScrollbar() { return this; }
+
+  // PPB_Scrollbar implementation.
+  uint32_t GetValue();
+  void SetValue(uint32_t value);
+  void SetDocumentSize(uint32_t size);
+  void SetTickMarks(const PP_Rect* tick_marks, uint32_t count);
+  void ScrollBy(PP_ScrollBy unit, int32_t multiplier);
+
+  // PPB_Widget implementation.
+  virtual bool Paint(const PP_Rect* rect, ImageData* image);
+  virtual bool HandleEvent(const PP_Event* event);
+  virtual void SetLocationInternal(const PP_Rect* location);
+
+ private:
+  // WebKit::WebScrollbarClient implementation.
+  virtual void valueChanged(WebKit::WebScrollbar* scrollbar);
+  virtual void invalidateScrollbarRect(WebKit::WebScrollbar* scrollbar,
+                                       const WebKit::WebRect& rect);
+  virtual void getTickmarks(
+      WebKit::WebScrollbar* scrollbar,
+      WebKit::WebVector<WebKit::WebRect>* tick_marks) const;
+
+  void NotifyInvalidate();
+
+  gfx::Rect dirty_;
+  std::vector<WebKit::WebRect> tickmarks_;
+  scoped_ptr<WebKit::WebScrollbar> scrollbar_;
+};
+
+}  // namespace pepper
+
+#endif  // WEBKIT_GLUE_PLUGINS_PEPPER_SCROLLBAR_H_