NTP Zombie Code Slayer Part IV: Most Visited

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

Index: chrome/browser/ui/webui/ntp/most_visited_handler.cc
diff --git a/chrome/browser/ui/webui/ntp/most_visited_handler.cc b/chrome/browser/ui/webui/ntp/most_visited_handler.cc
deleted file mode 100644
index 9deda8c1580de4d6699bf742adad7c4c4bd3b6b0..0000000000000000000000000000000000000000
--- a/chrome/browser/ui/webui/ntp/most_visited_handler.cc
+++ /dev/null
@@ -1,294 +0,0 @@
-// 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/most_visited_handler.h"
-
-#include <set>
-
-#include "base/bind.h"
-#include "base/bind_helpers.h"
-#include "base/command_line.h"
-#include "base/md5.h"
-#include "base/memory/scoped_vector.h"
-#include "base/memory/singleton.h"
-#include "base/metrics/histogram.h"
-#include "base/prefs/pref_service.h"
-#include "base/prefs/scoped_user_pref_update.h"
-#include "base/strings/string16.h"
-#include "base/strings/string_number_conversions.h"
-#include "base/strings/utf_string_conversions.h"
-#include "base/threading/thread.h"
-#include "base/values.h"
-#include "chrome/browser/favicon/fallback_icon_service_factory.h"
-#include "chrome/browser/favicon/large_icon_service_factory.h"
-#include "chrome/browser/history/top_sites_factory.h"
-#include "chrome/browser/profiles/profile.h"
-#include "chrome/browser/thumbnails/thumbnail_list_source.h"
-#include "chrome/browser/ui/browser.h"
-#include "chrome/browser/ui/browser_finder.h"
-#include "chrome/browser/ui/tabs/tab_strip_model.h"
-#include "chrome/browser/ui/tabs/tab_strip_model_utils.h"
-#include "chrome/browser/ui/webui/fallback_icon_source.h"
-#include "chrome/browser/ui/webui/favicon_source.h"
-#include "chrome/browser/ui/webui/large_icon_source.h"
-#include "chrome/browser/ui/webui/ntp/new_tab_ui.h"
-#include "chrome/browser/ui/webui/ntp/ntp_stats.h"
-#include "chrome/browser/ui/webui/ntp/thumbnail_source.h"
-#include "chrome/common/pref_names.h"
-#include "chrome/common/url_constants.h"
-#include "components/favicon/core/fallback_icon_service.h"
-#include "components/favicon/core/large_icon_service.h"
-#include "components/history/core/browser/page_usage_data.h"
-#include "components/history/core/browser/top_sites.h"
-#include "components/keyed_service/core/service_access_type.h"
-#include "components/pref_registry/pref_registry_syncable.h"
-#include "content/public/browser/navigation_controller.h"
-#include "content/public/browser/navigation_entry.h"
-#include "content/public/browser/url_data_source.h"
-#include "content/public/browser/user_metrics.h"
-#include "content/public/browser/web_contents.h"
-#include "content/public/browser/web_ui.h"
-#include "url/gurl.h"
-
-using base::UserMetricsAction;
-
-MostVisitedHandler::MostVisitedHandler()
-    : scoped_observer_(this),
-      got_first_most_visited_request_(false),
-      most_visited_viewed_(false),
-      user_action_logged_(false),
-      weak_ptr_factory_(this) {
-}
-
-MostVisitedHandler::~MostVisitedHandler() {
-  if (!user_action_logged_ && most_visited_viewed_) {
-    const GURL ntp_url = GURL(chrome::kChromeUINewTabURL);
-    int action_id = NTP_FOLLOW_ACTION_OTHER;
-    content::NavigationEntry* entry =
-        web_ui()->GetWebContents()->GetController().GetLastCommittedEntry();
-    if (entry && (entry->GetURL() != ntp_url)) {
-      action_id =
-          ui::PageTransitionStripQualifier(entry->GetTransitionType());
-    }
-
-    UMA_HISTOGRAM_ENUMERATION("NewTabPage.MostVisitedAction", action_id,
-                              NUM_NTP_FOLLOW_ACTIONS);
-  }
-}
-
-void MostVisitedHandler::RegisterMessages() {
-  Profile* profile = Profile::FromWebUI(web_ui());
-  // Set up our sources for thumbnail and favicon data.
-  content::URLDataSource::Add(profile, new ThumbnailSource(profile, false));
-  content::URLDataSource::Add(profile, new ThumbnailSource(profile, true));
-
-  // Set up our sources for top-sites data.
-  content::URLDataSource::Add(profile, new ThumbnailListSource(profile));
-
-  favicon::FallbackIconService* fallback_icon_service =
-      FallbackIconServiceFactory::GetForBrowserContext(profile);
-  favicon::LargeIconService* large_icon_service =
-      LargeIconServiceFactory::GetForBrowserContext(profile);
-
-  // Register chrome://fallback-icon as a data source for fallback icons.
-  content::URLDataSource::Add(profile,
-                              new FallbackIconSource(fallback_icon_service));
-
-  // Register chrome://favicon as a data source for favicons.
-  content::URLDataSource::Add(
-      profile, new FaviconSource(profile, FaviconSource::FAVICON));
-
-  // Register chrome://large-icon as a data source for large icons.
-  content::URLDataSource::Add(
-      profile, new LargeIconSource(fallback_icon_service, large_icon_service));
-
-  scoped_refptr<history::TopSites> top_sites =
-      TopSitesFactory::GetForProfile(profile);
-  if (top_sites) {
-    // TopSites updates itself after a delay. This is especially noticable when
-    // your profile is empty. Ask TopSites to update itself when we're about to
-    // show the new tab page.
-    top_sites->SyncWithHistory();
-
-    // Register as TopSitesObserver so that we can update ourselves when the
-    // TopSites changes.
-    scoped_observer_.Add(top_sites.get());
-  }
-
-  // We pre-emptively make a fetch for the most visited pages so we have the
-  // results sooner.
-  StartQueryForMostVisited();
-
-  web_ui()->RegisterMessageCallback("getMostVisited",
-      base::Bind(&MostVisitedHandler::HandleGetMostVisited,
-                 base::Unretained(this)));
-
-  // Register ourselves for any most-visited item blacklisting.
-  web_ui()->RegisterMessageCallback("blacklistURLFromMostVisited",
-      base::Bind(&MostVisitedHandler::HandleBlacklistUrl,
-                 base::Unretained(this)));
-  web_ui()->RegisterMessageCallback("removeURLsFromMostVisitedBlacklist",
-      base::Bind(&MostVisitedHandler::HandleRemoveUrlsFromBlacklist,
-                 base::Unretained(this)));
-  web_ui()->RegisterMessageCallback("clearMostVisitedURLsBlacklist",
-      base::Bind(&MostVisitedHandler::HandleClearBlacklist,
-                 base::Unretained(this)));
-  web_ui()->RegisterMessageCallback("mostVisitedAction",
-      base::Bind(&MostVisitedHandler::HandleMostVisitedAction,
-                 base::Unretained(this)));
-  web_ui()->RegisterMessageCallback("mostVisitedSelected",
-      base::Bind(&MostVisitedHandler::HandleMostVisitedSelected,
-                 base::Unretained(this)));
-}
-
-void MostVisitedHandler::HandleGetMostVisited(const base::ListValue* args) {
-  if (!got_first_most_visited_request_) {
-    // If our initial data is already here, return it.
-    SendPagesValue();
-    got_first_most_visited_request_ = true;
-  } else {
-    StartQueryForMostVisited();
-  }
-}
-
-void MostVisitedHandler::SendPagesValue() {
-  if (pages_value_) {
-    Profile* profile = Profile::FromWebUI(web_ui());
-    const base::DictionaryValue* url_blacklist =
-        profile->GetPrefs()->GetDictionary(prefs::kNtpMostVisitedURLsBlacklist);
-    bool has_blacklisted_urls = !url_blacklist->empty();
-    scoped_refptr<history::TopSites> ts =
-        TopSitesFactory::GetForProfile(profile);
-    if (ts)
-      has_blacklisted_urls = ts->HasBlacklistedItems();
-
-    base::FundamentalValue has_blacklisted_urls_value(has_blacklisted_urls);
-    web_ui()->CallJavascriptFunction("ntp.setMostVisitedPages",
-                                     *pages_value_,
-                                     has_blacklisted_urls_value);
-    pages_value_.reset();
-  }
-}
-
-void MostVisitedHandler::StartQueryForMostVisited() {
-  scoped_refptr<history::TopSites> ts =
-      TopSitesFactory::GetForProfile(Profile::FromWebUI(web_ui()));
-  if (ts) {
-    ts->GetMostVisitedURLs(
-        base::Bind(&MostVisitedHandler::OnMostVisitedUrlsAvailable,
-                   weak_ptr_factory_.GetWeakPtr()), false);
-  }
-}
-
-void MostVisitedHandler::HandleBlacklistUrl(const base::ListValue* args) {
-  std::string url = base::UTF16ToUTF8(ExtractStringValue(args));
-  BlacklistUrl(GURL(url));
-}
-
-void MostVisitedHandler::HandleRemoveUrlsFromBlacklist(
-    const base::ListValue* args) {
-  DCHECK(args->GetSize() != 0);
-
-  for (base::ListValue::const_iterator iter = args->begin();
-       iter != args->end(); ++iter) {
-    std::string url;
-    bool r = (*iter)->GetAsString(&url);
-    if (!r) {
-      NOTREACHED();
-      return;
-    }
-    content::RecordAction(UserMetricsAction("MostVisited_UrlRemoved"));
-    scoped_refptr<history::TopSites> ts =
-        TopSitesFactory::GetForProfile(Profile::FromWebUI(web_ui()));
-    if (ts)
-      ts->RemoveBlacklistedURL(GURL(url));
-  }
-}
-
-void MostVisitedHandler::HandleClearBlacklist(const base::ListValue* args) {
-  content::RecordAction(UserMetricsAction("MostVisited_BlacklistCleared"));
-
-  scoped_refptr<history::TopSites> ts =
-      TopSitesFactory::GetForProfile(Profile::FromWebUI(web_ui()));
-  if (ts)
-    ts->ClearBlacklistedURLs();
-}
-
-void MostVisitedHandler::HandleMostVisitedAction(const base::ListValue* args) {
-  DCHECK(args);
-
-  double action_id;
-  if (!args->GetDouble(0, &action_id))
-    NOTREACHED();
-
-  UMA_HISTOGRAM_ENUMERATION("NewTabPage.MostVisitedAction",
-                            static_cast<int>(action_id),
-                            NUM_NTP_FOLLOW_ACTIONS);
-  most_visited_viewed_ = true;
-  user_action_logged_ = true;
-}
-
-void MostVisitedHandler::HandleMostVisitedSelected(
-    const base::ListValue* args) {
-  most_visited_viewed_ = true;
-}
-
-void MostVisitedHandler::SetPagesValueFromTopSites(
-    const history::MostVisitedURLList& data) {
-  pages_value_.reset(new base::ListValue);
-
-  history::MostVisitedURLList top_sites(data);
-  for (size_t i = 0; i < top_sites.size(); i++) {
-    const history::MostVisitedURL& url = top_sites[i];
-
-    // The items which are to be written into |page_value| are also described in
-    // chrome/browser/resources/ntp4/new_tab.js in @typedef for PageData. Please
-    // update it whenever you add or remove any keys here.
-    base::DictionaryValue* page_value = new base::DictionaryValue();
-    if (url.url.is_empty()) {
-      page_value->SetBoolean("filler", true);
-      pages_value_->Append(page_value);
-      continue;
-    }
-
-    NewTabUI::SetUrlTitleAndDirection(page_value,
-                                      url.title,
-                                      url.url);
-    pages_value_->Append(page_value);
-  }
-}
-
-void MostVisitedHandler::OnMostVisitedUrlsAvailable(
-    const history::MostVisitedURLList& data) {
-  SetPagesValueFromTopSites(data);
-  if (got_first_most_visited_request_) {
-    SendPagesValue();
-  }
-}
-
-void MostVisitedHandler::TopSitesLoaded(history::TopSites* top_sites) {
-}
-
-void MostVisitedHandler::TopSitesChanged(history::TopSites* top_sites) {
-  // Most visited urls changed, query again.
-  StartQueryForMostVisited();
-}
-
-void MostVisitedHandler::BlacklistUrl(const GURL& url) {
-  scoped_refptr<history::TopSites> ts =
-      TopSitesFactory::GetForProfile(Profile::FromWebUI(web_ui()));
-  if (ts)
-    ts->AddBlacklistedURL(url);
-  content::RecordAction(UserMetricsAction("MostVisited_UrlBlacklisted"));
-}
-
-std::string MostVisitedHandler::GetDictionaryKeyForUrl(const std::string& url) {
-  return base::MD5String(url);
-}
-
-// static
-void MostVisitedHandler::RegisterProfilePrefs(
-    user_prefs::PrefRegistrySyncable* registry) {
-  registry->RegisterDictionaryPref(prefs::kNtpMostVisitedURLsBlacklist);
-}