Start axing NTP4 dead code.

chrome/browser/ui/webui/ntp/recently_closed_tabs_handler.cc

-// Copyright (c) 2012 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/ui/webui/ntp/recently_closed_tabs_handler.h"
-
-#include "base/bind.h"
-#include "base/bind_helpers.h"
-#include "base/metrics/histogram.h"
-#include "chrome/browser/profiles/profile.h"
-#include "chrome/browser/sessions/tab_restore_service_delegate.h"
-#include "chrome/browser/sessions/tab_restore_service_factory.h"
-#include "chrome/browser/ui/host_desktop.h"
-#include "chrome/browser/ui/webui/ntp/new_tab_ui.h"
-#include "chrome/common/url_constants.h"
-#include "content/public/browser/web_contents.h"
-#include "content/public/browser/web_ui.h"
-#include "ui/base/webui/web_ui_util.h"
-
-namespace {
-
-void TabToValue(const TabRestoreService::Tab& tab,
-                base::DictionaryValue* dictionary) {
-  const sessions::SerializedNavigationEntry& current_navigation =
-      tab.navigations.at(tab.current_navigation_index);
-  NewTabUI::SetUrlTitleAndDirection(dictionary, current_navigation.title(),
-                                    current_navigation.virtual_url());
-  dictionary->SetString("type", "tab");
-  dictionary->SetDouble("timestamp", tab.timestamp.ToDoubleT());
-}
-
-void WindowToValue(const TabRestoreService::Window& window,
-                   base::DictionaryValue* dictionary) {
-  DCHECK(!window.tabs.empty());
-
-  scoped_ptr<base::ListValue> tab_values(new base::ListValue());
-  for (size_t i = 0; i < window.tabs.size(); ++i) {
-    base::DictionaryValue* tab_value = new base::DictionaryValue();
-    TabToValue(window.tabs[i], tab_value);
-    tab_values->Append(tab_value);
-  }
-
-  dictionary->SetString("type", "window");
-  dictionary->SetDouble("timestamp", window.timestamp.ToDoubleT());
-  dictionary->Set("tabs", tab_values.release());
-}
-
-}  // namespace
-
-void RecentlyClosedTabsHandler::RegisterMessages() {
-  web_ui()->RegisterMessageCallback("getRecentlyClosedTabs",
-      base::Bind(&RecentlyClosedTabsHandler::HandleGetRecentlyClosedTabs,
-                 base::Unretained(this)));
-  web_ui()->RegisterMessageCallback("reopenTab",
-      base::Bind(&RecentlyClosedTabsHandler::HandleReopenTab,
-                 base::Unretained(this)));
-  web_ui()->RegisterMessageCallback("clearRecentlyClosed",
-      base::Bind(&RecentlyClosedTabsHandler::HandleClearRecentlyClosed,
-                 base::Unretained(this)));
-}
-
-RecentlyClosedTabsHandler::~RecentlyClosedTabsHandler() {
-  if (tab_restore_service_)
-    tab_restore_service_->RemoveObserver(this);
-}
-
-void RecentlyClosedTabsHandler::HandleReopenTab(const base::ListValue* args) {
-  if (!tab_restore_service_)
-    return;
-
-  double session_to_restore = 0.0;
-  CHECK(args->GetDouble(0, &session_to_restore));
-
-  double index = -1.0;
-  CHECK(args->GetDouble(1, &index));
-
-  // There are actually less than 20 restore tab items displayed in the UI.
-  UMA_HISTOGRAM_ENUMERATION("NewTabPage.SessionRestore",
-                            static_cast<int>(index), 20);
-
-  TabRestoreServiceDelegate* delegate =
-      TabRestoreServiceDelegate::FindDelegateForWebContents(
-          web_ui()->GetWebContents());
-  if (!delegate)
-    return;
-  chrome::HostDesktopType host_desktop_type =
-      chrome::GetHostDesktopTypeForNativeView(
-          web_ui()->GetWebContents()->GetNativeView());
-  WindowOpenDisposition disposition = webui::GetDispositionFromClick(args, 2);
-  tab_restore_service_->RestoreEntryById(delegate,
-                                         static_cast<int>(session_to_restore),
-                                         host_desktop_type,
-                                         disposition);
-  // The current tab has been nuked at this point; don't touch any member
-  // variables.
-}
-
-void RecentlyClosedTabsHandler::HandleClearRecentlyClosed(
-    const base::ListValue* args) {
-  EnsureTabRestoreService();
-  if (tab_restore_service_)
-    tab_restore_service_->ClearEntries();
-}
-
-void RecentlyClosedTabsHandler::HandleGetRecentlyClosedTabs(
-    const base::ListValue* args) {
-  EnsureTabRestoreService();
-  if (tab_restore_service_)
-    TabRestoreServiceChanged(tab_restore_service_);
-}
-
-void RecentlyClosedTabsHandler::TabRestoreServiceChanged(
-    TabRestoreService* service) {
-  base::ListValue list_value;
-  const int max_count = 10;
-  int added_count = 0;
-  // We filter the list of recently closed to only show 'interesting' entries,
-  // where an interesting entry is either a closed window or a closed tab
-  // whose selected navigation is not the new tab ui.
-  for (TabRestoreService::Entries::const_iterator it =
-           service->entries().begin();
-       it != service->entries().end() && added_count < max_count; ++it) {
-    TabRestoreService::Entry* entry = *it;
-    scoped_ptr<base::DictionaryValue> entry_dict(new base::DictionaryValue());
-    if (entry->type == TabRestoreService::TAB) {
-      TabToValue(*static_cast<TabRestoreService::Tab*>(entry),
-                 entry_dict.get());
-    } else  {
-      DCHECK_EQ(entry->type, TabRestoreService::WINDOW);
-      WindowToValue(*static_cast<TabRestoreService::Window*>(entry),
-                    entry_dict.get());
-    }
-
-    entry_dict->SetInteger("sessionId", entry->id);
-    list_value.Append(entry_dict.release());
-    ++added_count;
-  }
-
-  web_ui()->CallJavascriptFunction("ntp.setRecentlyClosedTabs", list_value);
-}
-
-void RecentlyClosedTabsHandler::TabRestoreServiceDestroyed(
-    TabRestoreService* service) {
-  tab_restore_service_ = NULL;
-}
-
-void RecentlyClosedTabsHandler::EnsureTabRestoreService() {
-  if (tab_restore_service_)
-    return;
-
-  tab_restore_service_ =
-      TabRestoreServiceFactory::GetForProfile(Profile::FromWebUI(web_ui()));
-
-  // TabRestoreServiceFactory::GetForProfile() can return NULL (i.e., when in
-  // Off the Record mode)
-  if (tab_restore_service_) {
-    // This does nothing if the tabs have already been loaded or they
-    // shouldn't be loaded.
-    tab_restore_service_->LoadTabsFromLastSession();
-    tab_restore_service_->AddObserver(this);
-  }
-}