Create CoreTabHelper, move remaining core TCW functionality into it.

chrome/browser/ui/tab_contents/core_tab_helper.cc

+// Copyright (c) 2011 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/tab_contents/core_tab_helper.h"
+
+#include "chrome/browser/prefs/pref_service.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/renderer_host/web_cache_manager.h"
+#include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
+#include "chrome/common/chrome_notification_types.h"
+#include "chrome/common/pref_names.h"
+#include "content/browser/renderer_host/render_view_host.h"
+#include "content/public/browser/notification_service.h"
+#include "grit/generated_resources.h"
+#include "ui/base/l10n/l10n_util.h"
+
+CoreTabHelper::CoreTabHelper(TabContentsWrapper* wrapper)
+    : TabContentsObserver(wrapper->tab_contents()),
+      delegate_(NULL),
+      wrapper_(wrapper) {
+  PrefService* prefs = wrapper_->profile()->GetPrefs();
+  if (prefs) {
+    pref_change_registrar_.Init(prefs);
+    pref_change_registrar_.Add(prefs::kDefaultZoomLevel, this);
+  }
+}
+
+CoreTabHelper::~CoreTabHelper() {
+}
+
+string16 CoreTabHelper::GetDefaultTitle() {
+  return l10n_util::GetStringUTF16(IDS_DEFAULT_TAB_TITLE);
+}
+
+string16 CoreTabHelper::GetStatusText() const {
+  if (!tab_contents()->IsLoading() ||
+      tab_contents()->load_state().state == net::LOAD_STATE_IDLE) {
+    return string16();
+  }
+
+  switch (tab_contents()->load_state().state) {
+    case net::LOAD_STATE_WAITING_FOR_DELEGATE:
+      return l10n_util::GetStringFUTF16(IDS_LOAD_STATE_WAITING_FOR_DELEGATE,
+                                        tab_contents()->load_state().param);
+    case net::LOAD_STATE_WAITING_FOR_CACHE:
+      return l10n_util::GetStringUTF16(IDS_LOAD_STATE_WAITING_FOR_CACHE);
+    case net::LOAD_STATE_WAITING_FOR_APPCACHE:
+      return l10n_util::GetStringUTF16(IDS_LOAD_STATE_WAITING_FOR_APPCACHE);
+    case net::LOAD_STATE_ESTABLISHING_PROXY_TUNNEL:
+      return
+          l10n_util::GetStringUTF16(IDS_LOAD_STATE_ESTABLISHING_PROXY_TUNNEL);
+    case net::LOAD_STATE_RESOLVING_PROXY_FOR_URL:
+      return l10n_util::GetStringUTF16(IDS_LOAD_STATE_RESOLVING_PROXY_FOR_URL);
+    case net::LOAD_STATE_RESOLVING_HOST_IN_PROXY_SCRIPT:
+      return l10n_util::GetStringUTF16(
+          IDS_LOAD_STATE_RESOLVING_HOST_IN_PROXY_SCRIPT);
+    case net::LOAD_STATE_RESOLVING_HOST:
+      return l10n_util::GetStringUTF16(IDS_LOAD_STATE_RESOLVING_HOST);
+    case net::LOAD_STATE_CONNECTING:
+      return l10n_util::GetStringUTF16(IDS_LOAD_STATE_CONNECTING);
+    case net::LOAD_STATE_SSL_HANDSHAKE:
+      return l10n_util::GetStringUTF16(IDS_LOAD_STATE_SSL_HANDSHAKE);
+    case net::LOAD_STATE_SENDING_REQUEST:
+      if (tab_contents()->upload_size())
+        return l10n_util::GetStringFUTF16Int(
+                    IDS_LOAD_STATE_SENDING_REQUEST_WITH_PROGRESS,
+                    static_cast<int>((100 * tab_contents()->upload_position()) /
+                        tab_contents()->upload_size()));
+      else
+        return l10n_util::GetStringUTF16(IDS_LOAD_STATE_SENDING_REQUEST);
+    case net::LOAD_STATE_WAITING_FOR_RESPONSE:
+      return l10n_util::GetStringFUTF16(IDS_LOAD_STATE_WAITING_FOR_RESPONSE,
+                                        tab_contents()->load_state_host());
+    // Ignore net::LOAD_STATE_READING_RESPONSE and net::LOAD_STATE_IDLE
+    case net::LOAD_STATE_IDLE:
+    case net::LOAD_STATE_READING_RESPONSE:
+      break;
+  }
+
+  return string16();
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// TabContentsObserver overrides
+
+void CoreTabHelper::DidBecomeSelected() {
+  WebCacheManager::GetInstance()->ObserveActivity(
+      tab_contents()->GetRenderProcessHost()->GetID());
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// content::NotificationObserver overrides
+
+void CoreTabHelper::Observe(int type,
+                            const content::NotificationSource& source,
+                            const content::NotificationDetails& details) {
+  switch (type) {
+    case chrome::NOTIFICATION_PREF_CHANGED: {
+      std::string* pref_name = content::Details<std::string>(details).ptr();
+      DCHECK(content::Source<PrefService>(source).ptr() ==
+             wrapper_->profile()->GetPrefs());
+      if (*pref_name == prefs::kDefaultZoomLevel) {
+        tab_contents()->render_view_host()->SetZoomLevel(
+            tab_contents()->GetZoomLevel());
+      } else {
+        NOTREACHED() << "unexpected pref change notification" << *pref_name;
+      }
+      break;
+    }
+    default:
+      NOTREACHED();
+  }
+}