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webplugin_delegate_pepper.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 CHROME_RENDERER_WEBPLUGIN_DELEGATE_PEPPER_H_
#define CHROME_RENDERER_WEBPLUGIN_DELEGATE_PEPPER_H_

#include "build/build_config.h"

#include <map>
#include <string>
#include <vector>

#include "base/file_path.h"
#include "base/id_map.h"
#include "base/ref_counted.h"
#include "base/task.h"
#include "base/weak_ptr.h"
#include "chrome/renderer/pepper_devices.h"
#include "chrome/renderer/render_view.h"
#include "chrome/renderer/command_buffer_proxy.h"
#include "gfx/native_widget_types.h"
#include "gfx/rect.h"
#include "third_party/npapi/bindings/npapi.h"
#include "third_party/WebKit/WebKit/chromium/public/WebFileChooserCompletion.h"
#include "webkit/glue/plugins/webplugin_delegate.h"
#include "webkit/glue/webcursor.h"

namespace NPAPI {
class PluginInstance;
}

// An implementation of WebPluginDelegate for Pepper in-process plugins.
class WebPluginDelegatePepper : public webkit_glue::WebPluginDelegate,
                                public WebKit::WebFileChooserCompletion {
 public:
  static WebPluginDelegatePepper* Create(
      const FilePath& filename,
      const std::string& mime_type,
      const base::WeakPtr<RenderView>& render_view);

  NPAPI::PluginInstance* instance() { return instance_.get(); }

  // WebKit::WebFileChooserCompletion implementation.
  virtual void didChooseFile(
      const WebKit::WebVector<WebKit::WebString>& file_names);

  // WebPluginDelegate implementation
  virtual bool Initialize(const GURL& url,
                          const std::vector<std::string>& arg_names,
                          const std::vector<std::string>& arg_values,
                          webkit_glue::WebPlugin* plugin,
                          bool load_manually);
  virtual void PluginDestroyed();
  virtual void UpdateGeometry(const gfx::Rect& window_rect,
                              const gfx::Rect& clip_rect);
  virtual void Paint(WebKit::WebCanvas* canvas, const gfx::Rect& rect);
  virtual void Print(gfx::NativeDrawingContext context);
  virtual void SetFocus();
  virtual bool HandleInputEvent(const WebKit::WebInputEvent& event,
                                WebKit::WebCursorInfo* cursor);
  virtual NPObject* GetPluginScriptableObject();
  virtual void DidFinishLoadWithReason(const GURL& url, NPReason reason,
                                       int notify_id);
  virtual int GetProcessId();
  virtual void SendJavaScriptStream(const GURL& url,
                                    const std::string& result,
                                    bool success,
                                    int notify_id);
  virtual void DidReceiveManualResponse(const GURL& url,
                                        const std::string& mime_type,
                                        const std::string& headers,
                                        uint32 expected_length,
                                        uint32 last_modified);
  virtual void DidReceiveManualData(const char* buffer, int length);
  virtual void DidFinishManualLoading();
  virtual void DidManualLoadFail();
  virtual void InstallMissingPlugin();
  virtual webkit_glue::WebPluginResourceClient* CreateResourceClient(
      unsigned long resource_id, const GURL& url, int notify_id);
  virtual webkit_glue::WebPluginResourceClient* CreateSeekableResourceClient(
      unsigned long resource_id, int range_request_id);
  virtual bool SupportsFind();
  virtual void StartFind(const std::string& search_text,
                         bool case_sensitive,
                         int identifier);
  virtual void SelectFindResult(bool forward);
  virtual void StopFind();
  virtual void NumberOfFindResultsChanged(int total, bool final_result);
  virtual void SelectedFindResultChanged(int index);
  virtual void Zoom(int factor);
  virtual bool ChooseFile(const char* mime_types,
                          int mode,
                          NPChooseFileCallback callback,
                          void* user_data);

  // WebPlugin2DDeviceDelegate implementation.
  virtual NPError Device2DQueryCapability(int32 capability, int32* value);
  virtual NPError Device2DQueryConfig(const NPDeviceContext2DConfig* request,
                                      NPDeviceContext2DConfig* obtain);
  virtual NPError Device2DInitializeContext(
      const NPDeviceContext2DConfig* config,
      NPDeviceContext2D* context);
  virtual NPError Device2DSetStateContext(NPDeviceContext2D* context,
                                          int32 state,
                                          intptr_t value);
  virtual NPError Device2DGetStateContext(NPDeviceContext2D* context,
                                          int32 state,
                                          intptr_t* value);
  virtual NPError Device2DFlushContext(NPP id,
                                       NPDeviceContext2D* context,
                                       NPDeviceFlushContextCallbackPtr callback,
                                       void* user_data);
  virtual NPError Device2DDestroyContext(NPDeviceContext2D* context);
  virtual NPError Device2DThemeGetSize(NPThemeItem item,
                                       int* width,
                                       int* height);
  virtual NPError Device2DThemePaint(NPDeviceContext2D* context,
                                     NPThemeParams* params);

  // WebPlugin3DDeviceDelegate implementation.
  virtual NPError Device3DQueryCapability(int32 capability, int32* value);
  virtual NPError Device3DQueryConfig(const NPDeviceContext3DConfig* request,
                                      NPDeviceContext3DConfig* obtain);
  virtual NPError Device3DInitializeContext(
      const NPDeviceContext3DConfig* config,
      NPDeviceContext3D* context);
  virtual NPError Device3DSetStateContext(NPDeviceContext3D* context,
                                          int32 state,
                                          intptr_t value);
  virtual NPError Device3DGetStateContext(NPDeviceContext3D* context,
                                          int32 state,
                                          intptr_t* value);
  virtual NPError Device3DFlushContext(NPP id,
                                       NPDeviceContext3D* context,
                                       NPDeviceFlushContextCallbackPtr callback,
                                       void* user_data);
  virtual NPError Device3DDestroyContext(NPDeviceContext3D* context);
  virtual NPError Device3DCreateBuffer(NPDeviceContext3D* context,
                                       size_t size,
                                       int32* id);
  virtual NPError Device3DDestroyBuffer(NPDeviceContext3D* context,
                                        int32 id);
  virtual NPError Device3DMapBuffer(NPDeviceContext3D* context,
                                    int32 id,
                                    NPDeviceBuffer* buffer);

  // WebPluginAudioDeviceDelegate implementation.
  virtual NPError DeviceAudioQueryCapability(int32 capability, int32* value);
  virtual NPError DeviceAudioQueryConfig(
      const NPDeviceContextAudioConfig* request,
      NPDeviceContextAudioConfig* obtain);
  virtual NPError DeviceAudioInitializeContext(
      const NPDeviceContextAudioConfig* config,
      NPDeviceContextAudio* context);
  virtual NPError DeviceAudioSetStateContext(NPDeviceContextAudio* context,
                                             int32 state, intptr_t value);
  virtual NPError DeviceAudioGetStateContext(NPDeviceContextAudio* context,
                                             int32 state, intptr_t* value);
  virtual NPError DeviceAudioFlushContext(
      NPP id, NPDeviceContextAudio* context,
      NPDeviceFlushContextCallbackPtr callback, void* user_data);
  virtual NPError DeviceAudioDestroyContext(NPDeviceContextAudio* context);

  // WebPluginPrintDelegate implementation.
  virtual bool PrintSupportsPrintExtension();
  virtual int PrintBegin(const gfx::Rect& printable_area, int printer_dpi);
  virtual bool PrintPage(int page_number, WebKit::WebCanvas* canvas);
  virtual void PrintEnd();

  gfx::Rect GetRect() const { return window_rect_; }
  gfx::Rect GetClipRect() const { return clip_rect_; }

  // Returns the path for the library implementing this plugin.
  FilePath GetPluginPath();

  // Notifications when the RenderView painted the screen (InitiatedPaint) and
  // when an ack was received that the browser copied it to the screen
  // (FlushedPaint).
  void RenderViewInitiatedPaint();
  void RenderViewFlushedPaint();

 private:
  WebPluginDelegatePepper(
      const base::WeakPtr<RenderView>& render_view,
      NPAPI::PluginInstance *instance);
  ~WebPluginDelegatePepper();

  // Set a task that calls the repaint callback the next time the window
  // is invalid and needs to be repainted.
  void ScheduleHandleRepaint(NPP npp, NPDeviceContext3D* context);

  //-----------------------------------------
  // used for windowed and windowless plugins

  // Closes down and destroys our plugin instance.
  void DestroyInstance();

  void ForwardSetWindow();

  // A helper method that invokes the plugin's Print extensions to calculate
  // the size needed in pixels to render the given page in a raster format.
  bool CalculatePrintedPageDimensions(int page_number,
                                      NPPPrintExtensions* print_extensions,
                                      gfx::Size* page_dimensions);
  NPPPrintExtensions* GetPrintExtensions();

  NPPFindExtensions* GetFindExtensions();

#if defined(OS_WIN)
  // Compresses the given bitmap as JPEG and draws it into the backing platform
  // DC (Windows-only).
  bool DrawJPEGToPlatformDC(const SkBitmap& bitmap,
                            const gfx::Rect& printable_area,
                            WebKit::WebCanvas* canvas);
#endif  // OS_WIN

#if defined(ENABLE_GPU)

  void ForwardHandleRepaint(NPP npp, NPDeviceContext3D* context);

  // Synchronize a 3D context state with the service.
  void Synchronize3DContext(NPDeviceContext3D* context,
                            gpu::CommandBuffer::State state);

  // Synchronize the 3D context state with the proxy and invoke the async
  // flush callback.
  void Device3DUpdateState(NPP npp,
                           NPDeviceContext3D* context,
                           NPDeviceFlushContextCallbackPtr callback,
                           void* user_data);
#endif

  // Tells the browser out-of-band where the nested delegate lives on
  // the page.
  void SendNestedDelegateGeometryToBrowser(const gfx::Rect& window_rect,
                                           const gfx::Rect& clip_rect);


  base::WeakPtr<RenderView> render_view_;

  webkit_glue::WebPlugin* plugin_;
  scoped_refptr<NPAPI::PluginInstance> instance_;

  NPWindow window_;
  gfx::Rect window_rect_;
  gfx::Rect clip_rect_;
  std::vector<gfx::Rect> cutout_rects_;

  // Open device contexts
  typedef IDMap<Graphics2DDeviceContext, IDMapOwnPointer> Graphics2DMap;
  Graphics2DMap graphic2d_contexts_;
  IDMap<AudioDeviceContext, IDMapOwnPointer> audio_contexts_;

  // Plugin graphics context implementation
  SkBitmap committed_bitmap_;

  // The url with which the plugin was instantiated.
  std::string plugin_url_;

  // The nested GPU plugin.
  WebPluginDelegateProxy* nested_delegate_;

  // The last printable_area passed in to PrintBegin. We remember this because
  // we need to stretch the printed raster bitmap to these dimensions. It is
  // cleared in PrintEnd.
  gfx::Rect current_printable_area_;

#if defined(ENABLE_GPU)
  // The command buffer used to issue commands to the nested GPU plugin.
  CommandBufferProxy* command_buffer_;
#endif

  // The id of the current find operation, or -1 if none is in process.
  int find_identifier_;

  // Runnable methods that must be cancelled when the 3D context is destroyed.
  ScopedRunnableMethodFactory<WebPluginDelegatePepper> method_factory3d_;

  // When a choose file operation is outstanding, this will contain a
  // pointer to the callback specified by the plugin. Will be NULL otherwise.
  NPChooseFileCallback current_choose_file_callback_;
  void* current_choose_file_user_data_;

  DISALLOW_COPY_AND_ASSIGN(WebPluginDelegatePepper);
};

#endif  // CHROME_RENDERER_WEBPLUGIN_DELEGATE_PEPPER_H_

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