📰 The Status card reports disabled sync states

chrome/android/java/src/org/chromium/chrome/browser/signin/AccountSigninActivity.java

 // Copyright 2016 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.signin;
 
 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
 import android.support.annotation.IntDef;
 import android.support.v7.app.AppCompatActivity;
 import android.view.LayoutInflater;
 
 import org.chromium.base.Log;
 import org.chromium.base.annotations.SuppressFBWarnings;
 import org.chromium.base.library_loader.ProcessInitException;
 import org.chromium.base.metrics.RecordUserAction;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.firstrun.ProfileDataCache;
 import org.chromium.chrome.browser.init.ChromeBrowserInitializer;
+import org.chromium.chrome.browser.preferences.ManagedPreferencesUtils;
 import org.chromium.chrome.browser.preferences.PreferencesLauncher;
 import org.chromium.chrome.browser.profiles.Profile;
 import org.chromium.chrome.browser.signin.SigninManager.SignInCallback;
 
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 
 /**
  * An Activity displayed from the MainPreferences to allow the user to pick an account to
  * sign in to. The AccountSigninView.Delegate interface is fulfilled by the AppCompatActivity.
  */
 public class AccountSigninActivity extends AppCompatActivity
         implements AccountSigninView.Listener, AccountSigninView.Delegate {
     private static final String TAG = "AccountSigninActivity";
     private static final String INTENT_SIGNIN_ACCESS_POINT =
             "AccountSigninActivity.SigninAccessPoint";
 
     private AccountSigninView mView;
     private ProfileDataCache mProfileDataCache;
 
     @IntDef({SigninAccessPoint.SETTINGS, SigninAccessPoint.BOOKMARK_MANAGER,
-            SigninAccessPoint.RECENT_TABS, SigninAccessPoint.SIGNIN_PROMO})
+            SigninAccessPoint.RECENT_TABS, SigninAccessPoint.SIGNIN_PROMO,
+            SigninAccessPoint.NTP_LINK})
     @Retention(RetentionPolicy.SOURCE)
     public @interface AccessPoint {}
     @AccessPoint private int mAccessPoint;
 
     /**
      * A convenience method to create a AccountSigninActivity passing the access point as an
      * intent.
      * @param accessPoint - A SigninAccessPoint designating where the activity is created from.
      */
     public static void startAccountSigninActivity(Context context, @AccessPoint int accessPoint) {
         Intent intent = new Intent(context, AccountSigninActivity.class);
         intent.putExtra(INTENT_SIGNIN_ACCESS_POINT, accessPoint);
         context.startActivity(intent);
     }
 
+    /**
+     * A convenience method to create a AccountSigninActivity passing the access point as an
+     * intent. Checks if the sign in flow can be started before showing the activity.
+     * @param accessPoint - A SigninAccessPoint designating where the activity is created from.
+     * @return {@code true} if sign in has been allowed.
+     */
+    public static boolean startIfAllowed(Context context, @AccessPoint int accessPoint) {
+        if (!SigninManager.get(context).isSignInAllowed()) {
+            if (SigninManager.get(context).isSigninDisabledByPolicy()) {
+                ManagedPreferencesUtils.showManagedByAdministratorToast(context);
+            }
+            return false;
+        }
+
+        startAccountSigninActivity(context, accessPoint);
+        return true;
+    }
+
     @Override
     @SuppressFBWarnings("DM_EXIT")
     protected void onCreate(Bundle savedInstanceState) {
         // The browser process must be started here because this activity may be started from the
         // recent apps list and it relies on other activities and the native library to be loaded.
         try {
             ChromeBrowserInitializer.getInstance(this).handleSynchronousStartup();
         } catch (ProcessInitException e) {
             Log.e(TAG, "Failed to start browser process.", e);
             // Since the library failed to initialize nothing in the application
@@ skipping 95 matching lines @@
                 RecordUserAction.record("Signin_Signin_FromSettings");
                 break;
             case SigninAccessPoint.SIGNIN_PROMO:
                 RecordUserAction.record("Signin_Signin_FromSigninPromo");
                 break;
             default:
                 assert false : "Invalid access point.";
         }
     }
 }