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      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/extensions/event_router.h"
     11 #include "chrome/browser/extensions/extension_system.h"
     12 #include "chrome/browser/profiles/profile_manager.h"
     13 #include "content/public/browser/browser_thread.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   // We may not have an extension in cases like chromeos login
    118   // (crosbug.com/12856), chrome_frame_net_tests.exe which reuses the chrome
    119   // browser single process framework.
    120   if (!extensions::ExtensionSystem::Get(profile)->event_router())
    121     return;
    122 
    123   scoped_ptr<Event> event(new Event(event_name, event_args.Pass()));
    124   event->restrict_to_profile = restrict_to_profile;
    125   event->event_url = event_url;
    126   if (extension_id.empty()) {
    127     ExtensionSystem::Get(profile)->event_router()->BroadcastEvent(event.Pass());
    128   } else {
    129     ExtensionSystem::Get(profile)->event_router()->
    130         DispatchEventToExtension(extension_id, event.Pass());
    131   }
    132 }
    133 
    134 }  // namespace extensions
    135