Add an android specific ntp resource cache.

chrome/browser/ui/webui/ntp/ntp_resource_cache_android.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/ntp_resource_cache.h"
+
+#include "base/string16.h"
+#include "base/string_piece.h"
+#include "base/utf_string_conversions.h"
+#include "base/values.h"
+#include "base/memory/ref_counted_memory.h"
+#include "chrome/browser/google/google_util.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/ui/webui/chrome_url_data_manager.h"
+#include "chrome/browser/ui/webui/ntp/new_tab_page_handler.h"
+#include "chrome/common/jstemplate_builder.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/browser/notification_service.h"
+#include "grit/browser_resources.h"
+#include "grit/generated_resources.h"
+#include "ui/base/l10n/l10n_util.h"
+#include "ui/base/resource/resource_bundle.h"
+
+using content::BrowserThread;
+
+namespace {
+
+const char kLearnMoreIncognitoUrl[] =
+    "https://www.google.com/support/chrome/bin/answer.py?answer=95464";
+
+}  // namespace
+
+NTPResourceCache::NTPResourceCache(Profile* profile) : profile_(profile) {}
+
+NTPResourceCache::~NTPResourceCache() {}
+
+RefCountedMemory* NTPResourceCache::GetNewTabHTML(bool is_incognito) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  // Android uses same html/css for incognito NTP and normal NTP
+  if (!new_tab_html_.get())
+    CreateNewTabHTML();
+  return new_tab_html_.get();
+}
+
+RefCountedMemory* NTPResourceCache::GetNewTabCSS(bool is_incognito) {
+  // This is used for themes, which are not currently supported on Android.
+  NOTIMPLEMENTED();
+  return NULL;
+}
+
+void NTPResourceCache::Observe(int type,
+    const content::NotificationSource& source,
+    const content::NotificationDetails& details) {
+  // No notifications necessary in Android.
+}
+
+void NTPResourceCache::CreateNewTabHTML() {
+  // TODO(estade): these strings should be defined in their relevant handlers
+  // (in GetLocalizedValues) and should have more legible names.
+  // Show the profile name in the title and most visited labels if the current
+  // profile is not the default.
+  DictionaryValue localized_strings;
+  localized_strings.SetString("hasattribution", "false");
+  localized_strings.SetString("title",
+      l10n_util::GetStringUTF16(IDS_NEW_TAB_TITLE));
+  localized_strings.SetString("mostvisited",
+      l10n_util::GetStringUTF16(IDS_NEW_TAB_MOST_VISITED));
+  localized_strings.SetString("recentlyclosed",
+      l10n_util::GetStringUTF16(IDS_NEW_TAB_RECENTLY_CLOSED));
+
+  NewTabPageHandler::GetLocalizedValues(profile_, &localized_strings);
+
+  ChromeURLDataManager::DataSource::SetFontAndTextDirection(&localized_strings);
+
+  base::StringPiece new_tab_html(ResourceBundle::GetSharedInstance().
+      GetRawDataResource(IDR_NEW_TAB_4_HTML));
+
+  const char* new_tab_link = kLearnMoreIncognitoUrl;
+  string16 learnMoreLink = ASCIIToUTF16(
+      google_util::AppendGoogleLocaleParam(GURL(new_tab_link)).spec());
+  localized_strings.SetString("content",
+      l10n_util::GetStringFUTF16(IDS_NEW_TAB_OTR_MESSAGE, learnMoreLink));
+
+  // Load the new tab page appropriate for this build.
+  std::string full_html;
+
+  // Inject the template data into the HTML so that it is available before any
+  // layout is needed.
+  std::string json_html;
+  jstemplate_builder::AppendJsonHtml(&localized_strings, &json_html);
+
+  static const base::StringPiece template_data_placeholder(
+      "<!-- template data placeholder -->");
+  size_t pos = new_tab_html.find(template_data_placeholder);
+
+  if (pos != base::StringPiece::npos) {
+    full_html.assign(new_tab_html.data(), pos);
+    full_html.append(json_html);
+    size_t after_offset = pos + template_data_placeholder.size();
+    full_html.append(new_tab_html.data() + after_offset,
+                     new_tab_html.size() - after_offset);
+  } else {
+    NOTREACHED();
+    full_html.assign(new_tab_html.data(), new_tab_html.size());
+  }
+
+  new_tab_html_ = base::RefCountedString::TakeString(&full_html);
+}