sync: take two for: "Added classes to enable session sync...

chrome/browser/dom_ui/foreign_session_handler.cc

+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/dom_ui/foreign_session_handler.h"
+
+#include "base/scoped_vector.h"
+#include "chrome/browser/browser.h"
+#include "chrome/browser/dom_ui/value_helper.h"
+#include "chrome/browser/sessions/session_restore.h"
+#include "chrome/browser/sessions/tab_restore_service.h"
+#include "chrome/browser/sync/engine/syncapi.h"
+#include "chrome/browser/sync/profile_sync_service.h"
+#include "chrome/browser/tab_contents/tab_contents.h"
+#include "chrome/common/notification_details.h"
+#include "chrome/common/notification_service.h"
+
+namespace browser_sync {
+
+static const int kMaxSessionsToShow = 10;
+
+ForeignSessionHandler::ForeignSessionHandler() {
+  Init();
+}
+
+void ForeignSessionHandler::RegisterMessages() {
+  dom_ui_->RegisterMessageCallback("getForeignSessions",
+      NewCallback(this,
+      &ForeignSessionHandler::HandleGetForeignSessions));
+  dom_ui_->RegisterMessageCallback("reopenForeignSession",
+      NewCallback(this,
+      &ForeignSessionHandler::HandleReopenForeignSession));
+}
+
+void ForeignSessionHandler::Init() {
+  registrar_.Add(this, NotificationType::SYNC_CONFIGURE_DONE,
+      NotificationService::AllSources());
+  registrar_.Add(this, NotificationType::FOREIGN_SESSION_UPDATED,
+      NotificationService::AllSources());
+  registrar_.Add(this, NotificationType::FOREIGN_SESSION_DELETED,
+      NotificationService::AllSources());
+}
+
+void ForeignSessionHandler::Observe(NotificationType type,
+                                    const NotificationSource& source,
+                                    const NotificationDetails& details) {
+  if (type != NotificationType::SYNC_CONFIGURE_DONE &&
+      type != NotificationType::FOREIGN_SESSION_UPDATED &&
+      type != NotificationType::FOREIGN_SESSION_DELETED) {
+    NOTREACHED();
+    return;
+  }
+  ListValue list_value;
+  HandleGetForeignSessions(&list_value);
+}
+
+SessionModelAssociator* ForeignSessionHandler::GetModelAssociator() {
+  ProfileSyncService* service = dom_ui_->GetProfile()->GetProfileSyncService();
+  if (service == NULL)
+    return NULL;
+  // We only want to set the model associator if there is one, and it is done
+  // syncing sessions.
+  SessionModelAssociator* model_associator = service->
+      GetSessionModelAssociator();
+  if (model_associator == NULL ||
+      !service->ShouldPushChanges()) {
+    return NULL;
+  }
+  return dom_ui_->GetProfile()->GetProfileSyncService()->
+      GetSessionModelAssociator();
+}
+
+void ForeignSessionHandler::HandleGetForeignSessions(const Value* content) {
+  SessionModelAssociator* associator = GetModelAssociator();
+  if (associator)
+    GetForeignSessions(associator);
+}
+
+void ForeignSessionHandler::HandleReopenForeignSession(
+    const Value* content) {
+  // Extract the machine tag and use it to obtain the id for the node we are
+  // looking for.  Send it along with a valid associator to OpenForeignSessions.
+  if (content->GetType() == Value::TYPE_LIST) {
+    const ListValue* list_value = static_cast<const ListValue*>(content);
+    Value* list_member;
+    if (list_value->Get(0, &list_member) &&
+        list_member->GetType() == Value::TYPE_STRING) {
+      const StringValue* string_value =
+          static_cast<const StringValue*>(list_member);
+      std::string session_string_value;
+      if (string_value->GetAsString(&session_string_value)) {
+        SessionModelAssociator* associator = GetModelAssociator();
+        if (associator) {
+          int64 id = associator->GetSyncIdFromChromeId(session_string_value);
+          OpenForeignSession(associator, id);
+        }
+      }
+    }
+  }
+}
+
+void ForeignSessionHandler::OpenForeignSession(
+    SessionModelAssociator* associator, int64 id) {
+  // Obtain the session windows for the foreign session.
+  // We don't have a ForeignSessionHandler in off the record mode, so we
+  // expect the ProfileSyncService to exist.
+  sync_api::ReadTransaction trans(dom_ui_->GetProfile()->
+      GetProfileSyncService()->backend()->GetUserShareHandle());
+  ScopedVector<ForeignSession> session;
+  associator->AppendForeignSessionWithID(id, &session.get(), &trans);
+
+  DCHECK(session.size() == 1);
+  std::vector<SessionWindow*> windows = (*session.begin())->windows;
+  SessionRestore::RestoreForeignSessionWindows(dom_ui_->GetProfile(), &windows);
+}
+
+void ForeignSessionHandler::GetForeignSessions(
+    SessionModelAssociator* associator) {
+  ScopedVector<ForeignSession> windows;
+  associator->GetSessionDataFromSyncModel(&windows.get());
+  int added_count = 0;
+  ListValue list_value;
+  for (std::vector<ForeignSession*>::const_iterator i =
+      windows.begin(); i != windows.end() &&
+      added_count < kMaxSessionsToShow; ++i) {
+    ForeignSession* foreign_session = *i;
+    std::vector<TabRestoreService::Entry*> entries;
+    dom_ui_->GetProfile()->GetTabRestoreService()->CreateEntriesFromWindows(
+        &foreign_session->windows, &entries);
+    for (std::vector<TabRestoreService::Entry*>::const_iterator it =
+        entries.begin(); it != entries.end(); ++it) {
+      TabRestoreService::Entry* entry = *it;
+      scoped_ptr<DictionaryValue> value(new DictionaryValue());
+      if (entry->type == TabRestoreService::WINDOW &&
+          ValueHelper::WindowToValue(
+              *static_cast<TabRestoreService::Window*>(entry), value.get())) {
+        // The javascript checks if the session id is a valid session id,
+        // when rendering session information to the new tab page, and it
+        // sends the sessionTag back when we need to restore a session.
+        value->SetString("sessionTag", foreign_session->foreign_tession_tag);
+        value->SetInteger("sessionId", entry->id);
+        list_value.Append(value.release());  // Give ownership to |list_value|.
+      }
+    }
+    added_count++;
+  }
+  dom_ui_->CallJavascriptFunction(L"foreignSessions", list_value);
+}
+
+}  // namespace browser_sync
+