chrome/browser/extensions/event_router_forwarder.cc

   1 // Copyright (c) 2012 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 #include "chrome/browser/extensions/event_router_forwarder.h"
   6
   7 #include "base/bind.h"
   8 #include "base/values.h"
   9 #include "chrome/browser/browser_process.h"
  10 #include "chrome/browser/profiles/profile_manager.h"
  11 #include "content/public/browser/browser_thread.h"
  12 #include "extensions/browser/event_router.h"
  13 #include "extensions/browser/extension_system.h"
  14 #include "url/gurl.h"
  15
  16 using content::BrowserThread;
  17
  18 namespace extensions {
  19
  20 EventRouterForwarder::EventRouterForwarder() {
  21 }
  22
  23 EventRouterForwarder::~EventRouterForwarder() {
  24 }
  25
  26 void EventRouterForwarder::BroadcastEventToRenderers(
  27     const std::string& event_name,
  28     scoped_ptr<base::ListValue> event_args,
  29     const GURL& event_url) {
  30   HandleEvent(std::string(), event_name, event_args.Pass(), 0, true, event_url);
  31 }
  32
  33 void EventRouterForwarder::DispatchEventToRenderers(
  34     const std::string& event_name,
  35     scoped_ptr<base::ListValue> event_args,
  36     void* profile,
  37     bool use_profile_to_restrict_events,
  38     const GURL& event_url) {
  39   if (!profile)
  40     return;
  41   HandleEvent(std::string(),
  42               event_name,
  43               event_args.Pass(),
  44               profile,
  45               use_profile_to_restrict_events,
  46               event_url);
  47 }
  48
  49 void EventRouterForwarder::BroadcastEventToExtension(
  50     const std::string& extension_id,
  51     const std::string& event_name,
  52     scoped_ptr<base::ListValue> event_args,
  53     const GURL& event_url) {
  54   HandleEvent(extension_id, event_name, event_args.Pass(), 0, true, event_url);
  55 }
  56
  57 void EventRouterForwarder::DispatchEventToExtension(
  58     const std::string& extension_id,
  59     const std::string& event_name,
  60     scoped_ptr<base::ListValue> event_args,
  61     void* profile,
  62     bool use_profile_to_restrict_events,
  63     const GURL& event_url) {
  64   if (!profile)
  65     return;
  66   HandleEvent(extension_id, event_name, event_args.Pass(), profile,
  67               use_profile_to_restrict_events, event_url);
  68 }
  69
  70 void EventRouterForwarder::HandleEvent(const std::string& extension_id,
  71                                        const std::string& event_name,
  72                                        scoped_ptr<base::ListValue> event_args,
  73                                        void* profile_ptr,
  74                                        bool use_profile_to_restrict_events,
  75                                        const GURL& event_url) {
  76   if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
  77     BrowserThread::PostTask(
  78         BrowserThread::UI, FROM_HERE,
  79         base::Bind(&EventRouterForwarder::HandleEvent, this,
  80                    extension_id, event_name, base::Passed(&event_args),
  81                    profile_ptr, use_profile_to_restrict_events, event_url));
  82     return;
  83   }
  84
  85   if (!g_browser_process || !g_browser_process->profile_manager())
  86     return;
  87
  88   ProfileManager* profile_manager = g_browser_process->profile_manager();
  89   Profile* profile = NULL;
  90   if (profile_ptr) {
  91     profile = reinterpret_cast<Profile*>(profile_ptr);
  92     if (!profile_manager->IsValidProfile(profile))
  93       return;
  94   }
  95   if (profile) {
  96     CallEventRouter(profile, extension_id, event_name, event_args.Pass(),
  97                     use_profile_to_restrict_events ? profile : NULL, event_url);
  98   } else {
  99     std::vector<Profile*> profiles(profile_manager->GetLoadedProfiles());
 100     for (size_t i = 0; i < profiles.size(); ++i) {
 101       scoped_ptr<base::ListValue> per_profile_event_args(
 102           event_args->DeepCopy());
 103       CallEventRouter(
 104           profiles[i], extension_id, event_name, per_profile_event_args.Pass(),
 105           use_profile_to_restrict_events ? profiles[i] : NULL, event_url);
 106     }
 107   }
 108 }
 109
 110 void EventRouterForwarder::CallEventRouter(
 111     Profile* profile,
 112     const std::string& extension_id,
 113     const std::string& event_name,
 114     scoped_ptr<base::ListValue> event_args,
 115     Profile* restrict_to_profile,
 116     const GURL& event_url) {
 117 #if defined(OS_CHROMEOS)
 118   // Extension does not exist for chromeos login.  This needs to be
 119   // removed once we have an extension service for login screen.
 120   // crosbug.com/12856.
 121   if (!extensions::ExtensionSystem::Get(profile)->event_router())
 122     return;
 123 #endif
 124
 125   scoped_ptr<Event> event(new Event(event_name, event_args.Pass()));
 126   event->restrict_to_browser_context = restrict_to_profile;
 127   event->event_url = event_url;
 128   if (extension_id.empty()) {
 129     ExtensionSystem::Get(profile)->event_router()->BroadcastEvent(event.Pass());
 130   } else {
 131     ExtensionSystem::Get(profile)->event_router()->
 132         DispatchEventToExtension(extension_id, event.Pass());
 133   }
 134 }
 135
 136 }  // namespace extensions