Add Browser Actions tab model selector and open a tab through it if ChromeTabbedActivity is not ava…

chrome/android/java/src/org/chromium/chrome/browser/browseractions/BrowserActionsService.java

Index: chrome/android/java/src/org/chromium/chrome/browser/browseractions/BrowserActionsService.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/browseractions/BrowserActionsService.java b/chrome/android/java/src/org/chromium/chrome/browser/browseractions/BrowserActionsService.java
new file mode 100644
index 0000000000000000000000000000000000000000..74ca5cabbcf3211ecfe00d43a64d8584f192ff85
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+++ b/chrome/android/java/src/org/chromium/chrome/browser/browseractions/BrowserActionsService.java
@@ -0,0 +1,183 @@
+// 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.browseractions;
+
+import android.app.NotificationManager;
+import android.app.PendingIntent;
+import android.app.Service;
+import android.content.Context;
+import android.content.Intent;
+import android.os.IBinder;
+import android.text.TextUtils;
+
+import org.chromium.base.ContextUtils;
+import org.chromium.base.VisibleForTesting;
+import org.chromium.chrome.R;
+import org.chromium.chrome.browser.document.ChromeLauncherActivity;
+import org.chromium.chrome.browser.notifications.ChromeNotificationBuilder;
+import org.chromium.chrome.browser.notifications.NotificationBuilderFactory;
+import org.chromium.chrome.browser.notifications.NotificationConstants;
+import org.chromium.chrome.browser.notifications.NotificationUmaTracker;
+import org.chromium.chrome.browser.notifications.channels.ChannelDefinitions;
+import org.chromium.chrome.browser.tab.Tab;
+import org.chromium.chrome.browser.util.IntentUtils;
+
+/**
+ * Service responsible for creating background tabs and notifications for Browser Actions.
+ */
+public class BrowserActionsService extends Service {
+    public static final String ACTION_TAB_CREATION_START =
+            "org.chromium.chrome.browser.browseractions.ACTION_TAB_CREATION_START";
+    public static final String ACTION_TAB_CREATION_UPDATE =
+            "org.chromium.chrome.browser.browseractions.ACTION_TAB_CREATION_UPDATE";
+    public static final String ACTION_TAB_CREATION_FINISH =
+            "org.chromium.chrome.browser.browseractions.ACTION_TAB_CREATION_FINISH";
+    public static final String EXTRA_TAB_ID = "org.chromium.chrome.browser.browseractions.TAB_ID";
+
+    /**
+     * Action to request open ChromeTabbedActivity in tab switcher mode.
+     */
+    public static final String ACTION_BROWSER_ACTIONS_OPEN_IN_BACKGROUND =
+            "org.chromium.chrome.browser.browseractions.browser_action_open_in_background";
+
+    public static final String PREF_HAS_BROWSER_ACTIONS_NOTIFICATION =
+            "org.chromium.chrome.browser.browseractions.HAS_BROWSER_ACTIONS_NOTIFICATION";
+
+    /**
+     * Extra that indicates whether to show a Tab for single url or the tab switcher for
+     * multiple urls.
+     */
+    public static final String EXTRA_IS_SINGLE_URL =
+            "org.chromium.chrome.browser.browseractions.is_single_url";
+
+    private static Intent sNotificationIntent;
+
+    private int mTitleResId = R.string.browser_actions_single_link_open_notification_title;
+
+    @Override
+    public IBinder onBind(Intent intent) {
+        return null;
+    }
+
+    @VisibleForTesting
+    static Intent getNotificationIntent() {
+        return sNotificationIntent;
+    }
+
+    @Override
+    public int onStartCommand(Intent intent, int flags, int startId) {
+        if (TextUtils.equals(intent.getAction(), ACTION_TAB_CREATION_START)) {
+            sendBrowserActionsNotification(Tab.INVALID_TAB_ID);
+            ContextUtils.getAppSharedPreferences()
+                    .edit()
+                    .putBoolean(PREF_HAS_BROWSER_ACTIONS_NOTIFICATION, true)
+                    .apply();
+            NotificationUmaTracker.getInstance().onNotificationShown(
+                    NotificationUmaTracker.BROWSER_ACTIONS, ChannelDefinitions.CHANNEL_ID_BROWSER);
+        } else if (TextUtils.equals(intent.getAction(), ACTION_TAB_CREATION_UPDATE)) {
+            int tabId = IntentUtils.safeGetIntExtra(intent, EXTRA_TAB_ID, Tab.INVALID_TAB_ID);
+            sendBrowserActionsNotification(tabId);
+        } else if (TextUtils.equals(intent.getAction(), ACTION_TAB_CREATION_FINISH)) {
+            stopForeground(false);
+        }
+        // The service will not be restarted if Chrome get killed.
+        return START_NOT_STICKY;
+    }
+
+    private void sendBrowserActionsNotification(int tabId) {
+        ChromeNotificationBuilder builder = createNotificationBuilder(tabId);
+        startForeground(NotificationConstants.NOTIFICATION_ID_BROWSER_ACTIONS, builder.build());
+    }
+
+    private ChromeNotificationBuilder createNotificationBuilder(int tabId) {
+        ChromeNotificationBuilder builder =
+                NotificationBuilderFactory
+                        .createChromeNotificationBuilder(
+                                true /* preferCompat */, ChannelDefinitions.CHANNEL_ID_BROWSER)
+                        .setSmallIcon(R.drawable.infobar_chrome)
+                        .setLocalOnly(true)
+                        .setAutoCancel(true)
+                        .setContentText(this.getString(R.string.browser_actions_notification_text));
+        if (tabId == Tab.INVALID_TAB_ID) {
+            mTitleResId = hasBrowserActionsNotification()
+                    ? R.string.browser_actions_multi_links_open_notification_title
+                    : R.string.browser_actions_single_link_open_notification_title;
+        }
+        builder.setContentTitle(this.getString(mTitleResId));
+        sNotificationIntent = buildNotificationIntent(tabId);
+        PendingIntent notifyPendingIntent = PendingIntent.getActivity(
+                this, 0, sNotificationIntent, PendingIntent.FLAG_UPDATE_CURRENT);
+        builder.setContentIntent(notifyPendingIntent);
+        return builder;
+    }
+
+    private Intent buildNotificationIntent(int tabId) {
+        boolean multipleUrls = hasBrowserActionsNotification();
+        if (!multipleUrls && tabId != Tab.INVALID_TAB_ID) {
+            return Tab.createBringTabToFrontIntent(tabId);
+        }
+        Intent intent = new Intent(this, ChromeLauncherActivity.class);
+        intent.setAction(ACTION_BROWSER_ACTIONS_OPEN_IN_BACKGROUND);
+        intent.putExtra(EXTRA_IS_SINGLE_URL, !multipleUrls);
+        return intent;
+    }
+
+    @VisibleForTesting
+    static boolean hasBrowserActionsNotification() {
+        return ContextUtils.getAppSharedPreferences().getBoolean(
+                PREF_HAS_BROWSER_ACTIONS_NOTIFICATION, false);
+    }
+
+    /**
+     * Cancel Browser Actions notification.
+     */
+    public static void cancelBrowserActionsNotification() {
+        NotificationManager notificationManager =
+                (NotificationManager) ContextUtils.getApplicationContext().getSystemService(
+                        Context.NOTIFICATION_SERVICE);
+        notificationManager.cancel(NotificationConstants.NOTIFICATION_ID_BROWSER_ACTIONS);
+        ContextUtils.getAppSharedPreferences()
+                .edit()
+                .putBoolean(PREF_HAS_BROWSER_ACTIONS_NOTIFICATION, false)
+                .apply();
+    }
+
+    /**
+     * Checks whether Chrome should display tab switcher via Browser Actions Intent.
+     * @param intent The intent to open the Chrome.
+     * @param isOverviewVisible Whether tab switcher is shown.
+     */
+    public static boolean shouldToggleOverview(Intent intent, boolean isOverviewVisible) {
+        boolean fromBrowserActions = isStartedByBrowserActions(intent);
+        boolean isSingleUrl = IntentUtils.safeGetBooleanExtra(intent, EXTRA_IS_SINGLE_URL, false);
+        if (fromBrowserActions) {
+            return isSingleUrl == isOverviewVisible;
+        }
+        return false;
+    }
+
+    private static boolean isStartedByBrowserActions(Intent intent) {
+        if (ACTION_BROWSER_ACTIONS_OPEN_IN_BACKGROUND.equals(intent.getAction())) {
+            return true;
+        }
+        return false;
+    }
+
+    /**
+     * Sends a {@link Intent} to update the notification and the status of the {@link
+     * BrowserActionsService}.
+     * @param action The actions of the Intent.
+     * @param tabId The id of the created Tab.
+     */
+    public static void sendIntent(String action, int tabId) {
+        Context context = ContextUtils.getApplicationContext();
+        Intent intent = new Intent(context, BrowserActionsService.class);
+        intent.setAction(action);
+        if (tabId != Tab.INVALID_TAB_ID) {
+            intent.putExtra(EXTRA_TAB_ID, tabId);
+        }
+        context.startService(intent);
+    }
+}