content/common/pepper_plugin_registry.h

   1 // Copyright (c) 2011 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 CONTENT_COMMON_PEPPER_PLUGIN_REGISTRY_H_
   6 #define CONTENT_COMMON_PEPPER_PLUGIN_REGISTRY_H_
   7 #pragma once
   8
   9 #include <list>
  10 #include <map>
  11
  12 #include "content/public/common/pepper_plugin_info.h"
  13 #include "webkit/plugins/ppapi/plugin_delegate.h"
  14
  15 // Constructs a PepperPluginInfo from a WebPluginInfo. Returns false if
  16 // the operation is not possible, in particular the WebPluginInfo::type
  17 // must be one of the pepper types.
  18 bool MakePepperPluginInfo(const webkit::WebPluginInfo& webplugin_info,
  19                           content::PepperPluginInfo* pepper_info);
  20
  21 // This class holds references to all of the known pepper plugin modules.
  22 //
  23 // It keeps two lists. One list of preloaded in-process modules, and one list
  24 // is a list of all live modules (some of which may be out-of-process and hence
  25 // not preloaded).
  26 class PepperPluginRegistry
  27     : public webkit::ppapi::PluginDelegate::ModuleLifetime {
  28  public:
  29   ~PepperPluginRegistry();
  30
  31   static PepperPluginRegistry* GetInstance();
  32
  33   // Computes the list of known pepper plugins.
  34   //
  35   // This method is static so that it can be used by the browser process, which
  36   // has no need to load the pepper plugin modules. It will re-compute the
  37   // plugin list every time it is called. Generally, code in the registry should
  38   // be using the cached plugin_list_ instead.
  39   CONTENT_EXPORT static void ComputeList(
  40       std::vector<content::PepperPluginInfo>* plugins);
  41
  42   // Loads the (native) libraries but does not initialize them (i.e., does not
  43   // call PPP_InitializeModule). This is needed by the zygote on Linux to get
  44   // access to the plugins before entering the sandbox.
  45   static void PreloadModules();
  46
  47   // Retrieves the information associated with the given plugin info. The
  48   // return value will be NULL if there is no such plugin.
  49   //
  50   // The returned pointer is owned by the PluginRegistry.
  51   const content::PepperPluginInfo* GetInfoForPlugin(
  52       const webkit::WebPluginInfo& info);
  53
  54   // Returns an existing loaded module for the given path. It will search for
  55   // both preloaded in-process or currently active (non crashed) out-of-process
  56   // plugins matching the given name. Returns NULL if the plugin hasn't been
  57   // loaded.
  58   webkit::ppapi::PluginModule* GetLiveModule(const FilePath& path);
  59
  60   // Notifies the registry that a new non-preloaded module has been created.
  61   // This is normally called for out-of-process plugins. Once this is called,
  62   // the module is available to be returned by GetModule(). The module will
  63   // automatically unregister itself by calling PluginModuleDestroyed().
  64   void AddLiveModule(const FilePath& path, webkit::ppapi::PluginModule* module);
  65
  66   // ModuleLifetime implementation.
  67   virtual void PluginModuleDead(
  68       webkit::ppapi::PluginModule* dead_module) OVERRIDE;
  69
  70  private:
  71   PepperPluginRegistry();
  72
  73   // All known pepper plugins.
  74   std::vector<content::PepperPluginInfo> plugin_list_;
  75
  76   // Plugins that have been preloaded so they can be executed in-process in
  77   // the renderer (the sandbox prevents on-demand loading).
  78   typedef std::map<FilePath, scoped_refptr<webkit::ppapi::PluginModule> >
  79       OwningModuleMap;
  80   OwningModuleMap preloaded_modules_;
  81
  82   // A list of non-owning pointers to all currently-live plugin modules. This
  83   // includes both preloaded ones in preloaded_modules_, and out-of-process
  84   // modules whose lifetime is managed externally. This will contain only
  85   // non-crashed modules. If an out-of-process module crashes, it may
  86   // continue as long as there are WebKit references to it, but it will not
  87   // appear in this list.
  88   typedef std::map<FilePath, webkit::ppapi::PluginModule*> NonOwningModuleMap;
  89   NonOwningModuleMap live_modules_;
  90
  91   DISALLOW_COPY_AND_ASSIGN(PepperPluginRegistry);
  92 };
  93
  94 #endif  // CONTENT_COMMON_PEPPER_PLUGIN_REGISTRY_H_