src/chrome/browser/renderer_host/pepper/pepper_extensions_common_message_filter.h

   1 // Copyright (c) 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 CHROME_BROWSER_RENDERER_HOST_PEPPER_PEPPER_EXTENSIONS_COMMON_MESSAGE_FILTER_H_
   6 #define CHROME_BROWSER_RENDERER_HOST_PEPPER_PEPPER_EXTENSIONS_COMMON_MESSAGE_FILTER_H_
   7
   8 #include <string>
   9
  10 #include "base/basictypes.h"
  11 #include "base/compiler_specific.h"
  12 #include "base/files/file_path.h"
  13 #include "base/memory/scoped_ptr.h"
  14 #include "base/strings/string16.h"
  15 #include "extensions/browser/extension_function.h"
  16 #include "ppapi/c/pp_instance.h"
  17 #include "ppapi/host/host_message_context.h"
  18 #include "ppapi/host/resource_message_filter.h"
  19 #include "url/gurl.h"
  20
  21 struct ExtensionHostMsg_Request_Params;
  22
  23 namespace base {
  24 class ListValue;
  25 }
  26
  27 namespace content {
  28 class BrowserPpapiHost;
  29 }
  30
  31 namespace chrome {
  32
  33 class PepperExtensionsCommonMessageFilter
  34     : public ppapi::host::ResourceMessageFilter {
  35  public:
  36   static PepperExtensionsCommonMessageFilter* Create(
  37       content::BrowserPpapiHost* host,
  38       PP_Instance instance);
  39
  40  protected:
  41   PepperExtensionsCommonMessageFilter(int render_process_id,
  42                                       int render_frame_id,
  43                                       const base::FilePath& profile_directory,
  44                                       const GURL& document_url);
  45   virtual ~PepperExtensionsCommonMessageFilter();
  46
  47   // ppapi::host::ResourceMessageFilter overrides.
  48   virtual scoped_refptr<base::TaskRunner> OverrideTaskRunnerForMessage(
  49       const IPC::Message& msg) OVERRIDE;
  50   virtual int32_t OnResourceMessageReceived(
  51       const IPC::Message& msg,
  52       ppapi::host::HostMessageContext* context) OVERRIDE;
  53
  54  private:
  55   // DispatcherOwner holds an ExtensionFunctionDispatcher instance and acts as
  56   // its delegate. It is designed to meet the lifespan requirements of
  57   // ExtensionFunctionDispatcher and its delegate. (Please see the comment of
  58   // ExtensionFunctionDispatcher constructor in
  59   // extension_function_dispatcher.h.)
  60   class DispatcherOwner;
  61
  62   int32_t OnPost(ppapi::host::HostMessageContext* context,
  63                  const std::string& request_name,
  64                  base::ListValue& args);
  65
  66   int32_t OnCall(ppapi::host::HostMessageContext* context,
  67                  const std::string& request_name,
  68                  base::ListValue& args);
  69
  70   // Returns true if |dispatcher_owner_| is non-null.
  71   bool EnsureDispatcherOwnerInitialized();
  72   // Resets |dispatcher_owner_| to NULL.
  73   void DetachDispatcherOwner();
  74
  75   void PopulateParams(const std::string& request_name,
  76                       base::ListValue* args,
  77                       bool has_callback,
  78                       ExtensionHostMsg_Request_Params* params);
  79
  80   void OnCallCompleted(ppapi::host::ReplyMessageContext reply_context,
  81                        ExtensionFunction::ResponseType type,
  82                        const base::ListValue& results,
  83                        const std::string& error);
  84
  85   // All the members are initialized on the IO thread when the object is
  86   // constructed, and accessed only on the UI thread afterwards.
  87   int render_process_id_;
  88   int render_frame_id_;
  89   base::FilePath profile_directory_;
  90   GURL document_url_;
  91
  92   // Not-owning pointer. It will be set to NULL when it goes away.
  93   DispatcherOwner* dispatcher_owner_;
  94   bool dispatcher_owner_initialized_;
  95
  96   DISALLOW_COPY_AND_ASSIGN(PepperExtensionsCommonMessageFilter);
  97 };
  98
  99 }  // namespace chrome
 100
 101 #endif  // CHROME_BROWSER_RENDERER_HOST_PEPPER_PEPPER_EXTENSIONS_COMMON_MESSAGE_FILTER_H_