🔍 Introduce default search engine dialog

chrome/android/java/src/org/chromium/chrome/browser/searchwidget/SearchWidgetProvider.java

 // Copyright 2017 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.
 
 package org.chromium.chrome.browser.searchwidget;
 
 import android.annotation.SuppressLint;
 import android.app.PendingIntent;
 import android.appwidget.AppWidgetManager;
 import android.appwidget.AppWidgetProvider;
@@ skipping 10 matching lines @@
 import android.widget.RemoteViews;
 
 import org.chromium.base.ContextUtils;
 import org.chromium.base.Log;
 import org.chromium.base.ThreadUtils;
 import org.chromium.base.VisibleForTesting;
 import org.chromium.base.library_loader.LibraryLoader;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.IntentHandler;
 import org.chromium.chrome.browser.firstrun.FirstRunFlowSequencer;
+import org.chromium.chrome.browser.omnibox.LocationBarLayout;
 import org.chromium.chrome.browser.search_engines.TemplateUrlService;
 import org.chromium.chrome.browser.search_engines.TemplateUrlService.LoadListener;
 import org.chromium.chrome.browser.search_engines.TemplateUrlService.TemplateUrlServiceObserver;
 import org.chromium.chrome.browser.util.IntentUtils;
 
 /**
  * Widget that lets the user search using their default search engine.
  *
  * Because this is a BroadcastReceiver, it dies immediately after it runs.  A new one is created
  * for each new broadcast.
@@ skipping 75 matching lines @@
     static final String PREF_SEARCH_ENGINE_SHORTNAME =
             "org.chromium.chrome.browser.searchwidget.SEARCH_ENGINE_SHORTNAME";
 
     /** Number of consecutive crashes this widget will absorb before giving up. */
     private static final int CRASH_LIMIT = 3;
 
     private static final String TAG = "searchwidget";
     private static final Object DELEGATE_LOCK = new Object();
     private static final Object OBSERVER_LOCK = new Object();
 
+    /** The default search engine's root URL. */
+    private static String sDefaultSearchEngineUrl;
+
     private static SearchWidgetTemplateUrlServiceObserver sObserver;
     private static SearchWidgetProviderDelegate sDelegate;
 
     /**
      * Creates the singleton instance of the observer that will monitor for search engine changes.
      * The native library and the browser process must have been fully loaded before calling this.
      */
     public static void initialize() {
         ThreadUtils.assertOnUiThread();
         assert LibraryLoader.isInitialized();
@@ skipping 148 matching lines @@
     /** Attempts to update the cached search engine name. */
     public static void updateCachedEngineName() {
         ThreadUtils.assertOnUiThread();
         if (!LibraryLoader.isInitialized()) return;
 
         // Getting an instance of the TemplateUrlService requires that the native library be
         // loaded, but the TemplateUrlService also itself needs to be initialized.
         TemplateUrlService service = TemplateUrlService.getInstance();
         if (!service.isLoaded()) return;
 
+        // Update the URL that we show for zero-suggest.
+        String searchEngineUrl = service.getSearchEngineUrlFromTemplateUrl(
+                service.getDefaultSearchEngineTemplateUrl().getKeyword());
+        sDefaultSearchEngineUrl =
+                LocationBarLayout.splitPathFromUrlDisplayText(searchEngineUrl).first;
+
         updateCachedEngineName(service.getDefaultSearchEngineTemplateUrl().getShortName());
     }
 
     /**
      * Updates the name of the user's default search engine that is cached in SharedPreferences.
      * Caching it in SharedPreferences prevents us from having to load the native library and the
      * TemplateUrlService whenever the widget is updated.
      */
     static void updateCachedEngineName(String engineName) {
         SharedPreferences prefs = getDelegate().getSharedPreferences();
@@ skipping 72 matching lines @@
                 getDelegate().getContext(), null, false);
         return freIntent == null;
     }
 
     /** Sets an {@link SearchWidgetProviderDelegate} to interact with. */
     @VisibleForTesting
     static void setDelegateForTest(SearchWidgetProviderDelegate delegate) {
         assert sDelegate == null;
         sDelegate = delegate;
     }
+
+    /** See {@link #sDefaultSearchEngineUrl}. */
+    static String getDefaultSearchEngineUrl() {
+        // TODO(yusufo): Get rid of this.
+        return sDefaultSearchEngineUrl;
+    }
 }