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      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 #include "chrome/browser/ui/webui/sync_internals_ui.h"
      6 
      7 #include <string>
      8 
      9 #include "base/logging.h"
     10 #include "base/memory/ref_counted.h"
     11 #include "base/task.h"
     12 #include "base/tracked_objects.h"
     13 #include "base/values.h"
     14 #include "chrome/browser/profiles/profile.h"
     15 #include "chrome/browser/sync/js_arg_list.h"
     16 #include "chrome/browser/sync/js_frontend.h"
     17 #include "chrome/browser/sync/profile_sync_service.h"
     18 #include "chrome/browser/sync/sync_ui_util.h"
     19 #include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
     20 #include "chrome/browser/ui/webui/chrome_url_data_manager.h"
     21 #include "chrome/browser/ui/webui/sync_internals_html_source.h"
     22 #include "chrome/common/extensions/extension_messages.h"
     23 #include "content/browser/browser_thread.h"
     24 
     25 SyncInternalsUI::SyncInternalsUI(TabContents* contents)
     26     : WebUI(contents) {
     27   browser_sync::JsFrontend* backend = GetJsFrontend();
     28   if (backend) {
     29     backend->AddHandler(this);
     30   }
     31   // If this PostTask() call fails, it's most likely because this is
     32   // being run from a unit test.  The created objects will be cleaned
     33   // up, anyway.
     34   contents->profile()->GetChromeURLDataManager()->AddDataSource(
     35       new SyncInternalsHTMLSource());
     36 }
     37 
     38 SyncInternalsUI::~SyncInternalsUI() {
     39   browser_sync::JsFrontend* backend = GetJsFrontend();
     40   if (backend) {
     41     backend->RemoveHandler(this);
     42   }
     43 }
     44 
     45 void SyncInternalsUI::ProcessWebUIMessage(
     46     const ExtensionHostMsg_DomMessage_Params& params) {
     47   const std::string& name = params.name;
     48   browser_sync::JsArgList args(params.arguments);
     49   VLOG(1) << "Received message: " << name << " with args "
     50           << args.ToString();
     51   // We handle this case directly because it needs to work even if
     52   // the sync service doesn't exist.
     53   if (name == "getAboutInfo") {
     54     ListValue args;
     55     DictionaryValue* about_info = new DictionaryValue();
     56     args.Append(about_info);
     57     ProfileSyncService* service = GetProfile()->GetProfileSyncService();
     58     sync_ui_util::ConstructAboutInformation(service, about_info);
     59     HandleJsEvent("onGetAboutInfoFinished",
     60                   browser_sync::JsArgList(args));
     61   } else {
     62     browser_sync::JsFrontend* backend = GetJsFrontend();
     63     if (backend) {
     64       backend->ProcessMessage(name, args, this);
     65     } else {
     66       LOG(WARNING) << "No sync service; dropping message " << name
     67                    << " with args " << args.ToString();
     68     }
     69   }
     70 }
     71 
     72 void SyncInternalsUI::HandleJsEvent(const std::string& name,
     73                                     const browser_sync::JsArgList& args) {
     74   VLOG(1) << "Handling event: " << name << " with args " << args.ToString();
     75   std::vector<const Value*> arg_list(args.Get().begin(), args.Get().end());
     76   CallJavascriptFunction(name, arg_list);
     77 }
     78 
     79 browser_sync::JsFrontend* SyncInternalsUI::GetJsFrontend() {
     80   // If this returns NULL that means that sync is disabled for
     81   // whatever reason.
     82   ProfileSyncService* sync_service = GetProfile()->GetProfileSyncService();
     83   return sync_service ? sync_service->GetJsFrontend() : NULL;
     84 }
     85