src/xwalk/extensions/browser/xwalk_extension_process_host.h

   1 // Copyright (c) 2013 Intel Corporation. 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 XWALK_EXTENSIONS_BROWSER_XWALK_EXTENSION_PROCESS_HOST_H_
   6 #define XWALK_EXTENSIONS_BROWSER_XWALK_EXTENSION_PROCESS_HOST_H_
   7
   8 #include <string>
   9
  10 #include "base/files/file_path.h"
  11 #include "base/memory/ref_counted.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "base/values.h"
  14 #include "content/public/browser/browser_child_process_host_delegate.h"
  15 #include "ipc/ipc_channel_handle.h"
  16 #include "ipc/ipc_channel_proxy.h"
  17 #include "ipc/ipc_sender.h"
  18 #include "xwalk/extensions/common/xwalk_extension_permission_types.h"
  19
  20 namespace content {
  21 class BrowserChildProcessHost;
  22 class RenderProcessHost;
  23 }
  24
  25 namespace xwalk {
  26 namespace extensions {
  27
  28 // This class represents the browser side of the browser <-> extension process
  29 // communication channel. It has to run some operations in IO thread for
  30 // creating the extra process.
  31 class XWalkExtensionProcessHost
  32     : public content::BrowserChildProcessHostDelegate,
  33       public IPC::Sender {
  34  public:
  35   class Delegate {
  36    public:
  37     virtual void OnExtensionProcessDied(XWalkExtensionProcessHost* eph,
  38         int render_process_id) {}
  39     virtual void OnCheckAPIAccessControl(const std::string& extension_name,
  40         const std::string& api_name, const PermissionCallback& callback) {}
  41     virtual bool OnRegisterPermissions(const std::string& extension_name,
  42         const std::string& perm_table) { return false; }
  43
  44    protected:
  45     ~Delegate() {}
  46   };
  47
  48   XWalkExtensionProcessHost(content::RenderProcessHost* render_process_host,
  49                             const base::FilePath& external_extensions_path,
  50                             XWalkExtensionProcessHost::Delegate* delegate,
  51                             const base::ValueMap& runtime_variables);
  52   virtual ~XWalkExtensionProcessHost();
  53
  54   // IPC::Sender implementation
  55   virtual bool Send(IPC::Message* msg) OVERRIDE;
  56
  57  private:
  58   class RenderProcessMessageFilter;
  59
  60   void StartProcess();
  61   void StopProcess();
  62
  63   // Handler for message from Render Process host, it is a synchronous message,
  64   // that will be replied only when the extension process channel is created.
  65   void OnGetExtensionProcessChannel(scoped_ptr<IPC::Message> reply);
  66
  67   // content::BrowserChildProcessHostDelegate implementation.
  68   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
  69   virtual void OnChannelError() OVERRIDE;
  70   virtual void OnProcessLaunched() OVERRIDE;
  71
  72   // Message Handlers.
  73   void OnRenderChannelCreated(const IPC::ChannelHandle& channel_id);
  74
  75   void ReplyChannelHandleToRenderProcess();
  76
  77   void OnCheckAPIAccessControl(const std::string& extension_name,
  78       const std::string& api_name, IPC::Message* reply_msg);
  79   void ReplyAccessControlToExtension(IPC::Message* reply_msg,
  80       RuntimePermission perm);
  81   void OnRegisterPermissions(const std::string& extension_name,
  82       const std::string& perm_table, bool* result);
  83
  84   scoped_ptr<content::BrowserChildProcessHost> process_;
  85   IPC::ChannelHandle ep_rp_channel_handle_;
  86   content::RenderProcessHost* render_process_host_;
  87   scoped_ptr<IPC::Message> pending_reply_for_render_process_;
  88
  89   // We use this filter to know when RP asked for the extension process channel.
  90   // We keep the reference to invalidate the filter once we don't need it
  91   // anymore.
  92   //
  93   // TODO(cmarcelo): Avoid having an extra filter, see if we can embed this
  94   // handling in the existing filter we have in ExtensionData struct.
  95   scoped_refptr<RenderProcessMessageFilter> render_process_message_filter_;
  96
  97   base::FilePath external_extensions_path_;
  98
  99   bool is_extension_process_channel_ready_;
 100
 101   XWalkExtensionProcessHost::Delegate* delegate_;
 102
 103   base::ValueMap runtime_variables_;
 104 };
 105
 106 }  // namespace extensions
 107 }  // namespace xwalk
 108
 109 #endif  // XWALK_EXTENSIONS_BROWSER_XWALK_EXTENSION_PROCESS_HOST_H_