Create snackbars for Data Use accounting

Write a DataUseTabUIManager in Java that has JNI bindings to a
DataUseTabUIManagerAndroid in C++ with static functions to see if a
data use session is starting or finishing.

Create snackbars to be shown when a data use session is starting
or finishing.

Modify ChromeActivity to ask DataUseTabUIManager if it should show
a snackbar.

BUG=550657

Review URL: https://codereview.chromium.org/1414513006

Cr-Commit-Position: refs/heads/master@{#358470}

8 files changed, 190 insertions, 1 deletions

diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java b/chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java
index e71c16e..db8abd8 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ChromeActivity.java
@@ -70,6 +70,7 @@ import org.chromium.chrome.browser.compositor.layouts.content.TabContentManager;
 import org.chromium.chrome.browser.contextualsearch.ContextualSearchFieldTrial;
 import org.chromium.chrome.browser.contextualsearch.ContextualSearchManager;
 import org.chromium.chrome.browser.contextualsearch.ContextualSearchManager.ContextualSearchTabPromotionDelegate;
+import org.chromium.chrome.browser.datausage.DataUseTabUIManager;
 import org.chromium.chrome.browser.device.DeviceClassManager;
 import org.chromium.chrome.browser.dom_distiller.DistilledPagePrefsView;
 import org.chromium.chrome.browser.dom_distiller.ReaderModeActivityDelegate;
@@ -96,6 +97,7 @@ import org.chromium.chrome.browser.preferences.PrefServiceBridge;
 import org.chromium.chrome.browser.preferences.PreferencesLauncher;
 import org.chromium.chrome.browser.printing.TabPrinter;
 import org.chromium.chrome.browser.share.ShareHelper;
+import org.chromium.chrome.browser.snackbar.DataUseSnackbarController;
 import org.chromium.chrome.browser.snackbar.LoFiBarPopupController;
 import org.chromium.chrome.browser.snackbar.SnackbarManager;
 import org.chromium.chrome.browser.snackbar.SnackbarManager.SnackbarManageable;
@@ -204,6 +206,7 @@ public abstract class ChromeActivity extends AsyncInitializationActivity
     private ReaderModeActivityDelegate mReaderModeActivityDelegate;
     private SnackbarManager mSnackbarManager;
     private LoFiBarPopupController mLoFiBarPopupController;
+    private DataUseSnackbarController mDataUseSnackbarController;
     private ChromeAppMenuPropertiesDelegate mAppMenuPropertiesDelegate;
     private AppMenuHandler mAppMenuHandler;
     private ToolbarManager mToolbarManager;
@@ -253,6 +256,7 @@ public abstract class ChromeActivity extends AsyncInitializationActivity
         mWindowAndroid.restoreInstanceState(getSavedInstanceState());
         mSnackbarManager = new SnackbarManager(getWindow());
         mLoFiBarPopupController = new LoFiBarPopupController(this, getSnackbarManager());
+        mDataUseSnackbarController = new DataUseSnackbarController(this, getSnackbarManager());
 
         mAssistStatusHandler = createAssistStatusHandler();
         if (mAssistStatusHandler != null) {
@@ -454,6 +458,17 @@ public abstract class ChromeActivity extends AsyncInitializationActivity
         if (mTabModelSelectorTabObserver != null) mTabModelSelectorTabObserver.destroy();
         mTabModelSelectorTabObserver = new TabModelSelectorTabObserver(tabModelSelector) {
             @Override
+            public void onPageLoadStarted(Tab tab, String url) {
+                if (DataUseTabUIManager.hasDataUseTrackingStarted(tab)) {
+                    mDataUseSnackbarController.showDataUseTrackingStartedBar();
+                }
+
+                if (DataUseTabUIManager.hasDataUseTrackingEnded(tab)) {
+                    mDataUseSnackbarController.showDataUseTrackingEndedBar();
+                }
+            }
+
+            @Override
             public void didFirstVisuallyNonEmptyPaint(Tab tab) {
                 if (!tab.isNativePage() && !tab.isIncognito()
                         && DataReductionProxySettings.getInstance().wasLoFiModeActiveOnMainFrame()
@@ -482,11 +497,13 @@ public abstract class ChromeActivity extends AsyncInitializationActivity
             @Override
             public void onHidden(Tab tab) {
                 mLoFiBarPopupController.dismissLoFiBar();
+                mDataUseSnackbarController.dismissDataUseBar();
             }
 
             @Override
             public void onDestroyed(Tab tab) {
                 mLoFiBarPopupController.dismissLoFiBar();
+                mDataUseSnackbarController.dismissDataUseBar();
             }
 
             @Override
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/datausage/DataUseTabUIManager.java b/chrome/android/java/src/org/chromium/chrome/browser/datausage/DataUseTabUIManager.java
new file mode 100644
index 0000000..a19d99f
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/datausage/DataUseTabUIManager.java
@@ -0,0 +1,40 @@
+// Copyright 2015 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.datausage;
+
+import org.chromium.chrome.browser.profiles.Profile;
+import org.chromium.chrome.browser.sessions.SessionTabHelper;
+import org.chromium.chrome.browser.tab.Tab;
+
+/**
+ * Entry point to manage all UI details for measuring data use within a Tab.
+ */
+public class DataUseTabUIManager {
+
+    /**
+     * Returns true if data use tracking has started within a Tab.
+     *
+     * @param tab The tab to see if tracking has started in.
+     * @return If data use tracking has started.
+     */
+    public static boolean hasDataUseTrackingStarted(Tab tab) {
+        return nativeHasDataUseTrackingStarted(
+                SessionTabHelper.sessionIdForTab(tab.getWebContents()), tab.getProfile());
+    }
+
+    /**
+     * Returns true if data use tracking has ended within a Tab.
+     *
+     * @param tab The tab to see if tracking has ended in.
+     * @return If data use tracking has ended.
+     */
+    public static boolean hasDataUseTrackingEnded(Tab tab) {
+        return nativeHasDataUseTrackingEnded(
+                SessionTabHelper.sessionIdForTab(tab.getWebContents()), tab.getProfile());
+    }
+
+    private static native boolean nativeHasDataUseTrackingStarted(int tabId, Profile profile);
+    private static native boolean nativeHasDataUseTrackingEnded(int tabId, Profile profile);
+}
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/snackbar/DataUseSnackbarController.java b/chrome/android/java/src/org/chromium/chrome/browser/snackbar/DataUseSnackbarController.java
new file mode 100644
index 0000000..944ef2b
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/snackbar/DataUseSnackbarController.java
@@ -0,0 +1,68 @@
+// Copyright 2015 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.snackbar;
+
+import android.content.Context;
+
+import org.chromium.chrome.R;
+
+/**
+ * The controller for the data use snackbars. This handles two snackbars:
+ *
+ * 1. When Chrome starts tracking data use in a Tab, it shows a snackbar informing the user that
+ * data use tracking has started.
+ *
+ * 2. When Chrome stops tracking data use in a Tab, it shows a snackbar informing the user that
+ * data use tracking has ended.
+ */
+public class DataUseSnackbarController implements SnackbarManager.SnackbarController {
+    private final SnackbarManager mSnackbarManager;
+    private final Context mContext;
+
+    /**
+     * Creates an instance of a {@link DataUseBarPopupController}.
+     * @param context The {@link Context} in which snackbar is shown.
+     * @param snackbarManager The manager that helps to show up snackbar.
+     */
+    public DataUseSnackbarController(Context context, SnackbarManager snackbarManager) {
+        mSnackbarManager = snackbarManager;
+        mContext = context;
+    }
+
+    public void showDataUseTrackingStartedBar() {
+        mSnackbarManager.showSnackbar(Snackbar.make(
+                mContext.getString(R.string.data_use_tracking_started_snackbar_message), this)
+                .setAction(mContext.getString(R.string.data_use_tracking_started_snackbar_action),
+                        null));
+        // TODO(megjablon): Add metrics.
+    }
+
+    public void showDataUseTrackingEndedBar() {
+        mSnackbarManager.showSnackbar(Snackbar.make(
+                mContext.getString(R.string.data_use_tracking_ended_title), this));
+        // TODO(megjablon): Add metrics.
+    }
+
+    /**
+     * Dismisses the snackbar.
+     */
+    public void dismissDataUseBar() {
+        if (mSnackbarManager.isShowing()) mSnackbarManager.dismissSnackbars(this);
+    }
+
+    /**
+     * Loads the "Learn more" page.
+     */
+    @Override
+    public void onAction(Object actionData) {
+        // TODO(megjablon): Load the more page and add metrics.
+    }
+
+    @Override
+    public void onDismissNoAction(Object actionData) {}
+
+    @Override
+    public void onDismissForEachType(boolean isTimeout) {}
+}
diff --git a/chrome/android/java/strings/android_chrome_strings.grd b/chrome/android/java/strings/android_chrome_strings.grd
index 1be6195..658c77a 100644
--- a/chrome/android/java/strings/android_chrome_strings.grd
+++ b/chrome/android/java/strings/android_chrome_strings.grd
@@ -776,6 +776,17 @@ To obtain new licenses, connect to the internet and play your downloaded content
         Data Saver is on. Manage it in Settings.
       </message>
 
+      <!-- Data Use -->
+      <message name="IDS_DATA_USE_TRACKING_STARTED_SNACKBAR_MESSAGE" desc="Message shown when data use tracking begins.">
+        Your data use is being tracked
+      </message>
+      <message name="IDS_DATA_USE_TRACKING_STARTED_SNACKBAR_ACTION" desc="Button to learn more when data use tracking begins.">
+        More
+      </message>
+      <message name="IDS_DATA_USE_TRACKING_ENDED_TITLE" desc="Message shown when data use tracking has ended. Used by both the snackbar and dialog.">
+        Data use tracking has ended
+      </message>
+
       <!-- About Chrome preferences -->
       <message name="IDS_PREFS_ABOUT_CHROME" desc="Title for the About Chrome page. [CHAR-LIMIT=32]">
         About Chrome
diff --git a/chrome/browser/android/chrome_jni_registrar.cc b/chrome/browser/android/chrome_jni_registrar.cc
index 4620a16..41e6895 100644
--- a/chrome/browser/android/chrome_jni_registrar.cc
+++ b/chrome/browser/android/chrome_jni_registrar.cc
@@ -31,6 +31,7 @@
 #include "chrome/browser/android/contextualsearch/contextual_search_manager.h"
 #include "chrome/browser/android/contextualsearch/contextual_search_tab_helper.h"
 #include "chrome/browser/android/cookies/cookies_fetcher.h"
+#include "chrome/browser/android/data_usage/data_use_tab_ui_manager_android.h"
 #include "chrome/browser/android/data_usage/external_data_use_observer.h"
 #include "chrome/browser/android/dev_tools_server.h"
 #include "chrome/browser/android/document/document_web_contents_delegate.h"
@@ -238,6 +239,7 @@ static base::android::RegistrationMethod kChromeRegisteredMethods[] = {
     {"CreditCardScanner", autofill::CreditCardScannerViewAndroid::Register},
     {"DataReductionProxyInfoBarDelegate", DataReductionProxyInfoBar::Register},
     {"DataReductionProxySettings", DataReductionProxySettingsAndroid::Register},
+    {"DataUseTabUIManager", RegisterDataUseTabUIManager},
     {"DevToolsServer", RegisterDevToolsServer},
     {"DocumentWebContentsDelegate", DocumentWebContentsDelegate::Register},
     {"DomDistillerServiceFactory",
diff --git a/chrome/browser/android/data_usage/data_use_tab_ui_manager_android.cc b/chrome/browser/android/data_usage/data_use_tab_ui_manager_android.cc
new file mode 100644
index 0000000..0f14228
--- /dev/null
+++ b/chrome/browser/android/data_usage/data_use_tab_ui_manager_android.cc
@@ -0,0 +1,35 @@
+// Copyright 2015 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/android/data_usage/data_use_tab_ui_manager_android.h"
+
+#include "base/android/jni_android.h"
+#include "chrome/browser/profiles/profile_android.h"
+#include "jni/DataUseTabUIManager_jni.h"
+
+// static
+jboolean HasDataUseTrackingStarted(JNIEnv* env,
+                                   const JavaParamRef<jclass>& clazz,
+                                   jint tab_id,
+                                   const JavaParamRef<jobject>& jprofile) {
+  // TODO(megjablon): Get the DataUseTabUIManager which is a keyed service and
+  // ask it if data use tracking has started.
+  // Profile* profile = ProfileAndroid::FromProfileAndroid(jprofile);
+  return false;
+}
+
+// static
+jboolean HasDataUseTrackingEnded(JNIEnv* env,
+                                 const JavaParamRef<jclass>& clazz,
+                                 jint tab_id,
+                                 const JavaParamRef<jobject>& jprofile) {
+  // TODO(megjablon): Get the DataUseTabUIManager which is a keyed service and
+  // ask it if data use tracking has ended.
+  // Profile* profile = ProfileAndroid::FromProfileAndroid(jprofile);
+  return false;
+}
+
+bool RegisterDataUseTabUIManager(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
diff --git a/chrome/browser/android/data_usage/data_use_tab_ui_manager_android.h b/chrome/browser/android/data_usage/data_use_tab_ui_manager_android.h
new file mode 100644
index 0000000..b2444c3
--- /dev/null
+++ b/chrome/browser/android/data_usage/data_use_tab_ui_manager_android.h
@@ -0,0 +1,13 @@
+// Copyright 2015 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.
+
+#ifndef CHROME_BROWSER_ANDROID_DATA_USAGE_DATA_USE_TAB_UI_MANAGER_ANDROID_H_
+#define CHROME_BROWSER_ANDROID_DATA_USAGE_DATA_USE_TAB_UI_MANAGER_ANDROID_H_
+
+#include <jni.h>
+
+// Registers the RegisterDataUseTabUIManager's native methods through JNI.
+bool RegisterDataUseTabUIManager(JNIEnv* env);
+
+#endif  // CHROME_BROWSER_ANDROID_DATA_USAGE_DATA_USE_TAB_UI_MANAGER_ANDROID_H_
diff --git a/chrome/chrome_browser.gypi b/chrome/chrome_browser.gypi
index 9d11560..3855ee3 100644
--- a/chrome/chrome_browser.gypi
+++ b/chrome/chrome_browser.gypi
@@ -870,6 +870,8 @@
     'chrome_browser_android_sources': [
       'browser/android/background_sync_launcher_android.cc',
       'browser/android/background_sync_launcher_android.h',
+      'browser/android/data_usage/data_use_tab_ui_manager_android.cc',
+      'browser/android/data_usage/data_use_tab_ui_manager_android.h',
       'browser/download/download_request_infobar_delegate_android.cc',
       'browser/download/download_request_infobar_delegate_android.h',
       'browser/geolocation/geolocation_infobar_delegate_android.cc',
@@ -1781,9 +1783,10 @@
       'android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchManager.java',
       'android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchTabHelper.java',
       'android/java/src/org/chromium/chrome/browser/cookies/CookiesFetcher.java',
-      'android/java/src/org/chromium/chrome/browser/datausage/ExternalDataUseObserver.java',
       'android/java/src/org/chromium/chrome/browser/DevToolsServer.java',
       'android/java/src/org/chromium/chrome/browser/database/SQLiteCursor.java',
+      'android/java/src/org/chromium/chrome/browser/datausage/DataUseTabUIManager.java',
+      'android/java/src/org/chromium/chrome/browser/datausage/ExternalDataUseObserver.java',
       'android/java/src/org/chromium/chrome/browser/document/DocumentWebContentsDelegate.java',
       'android/java/src/org/chromium/chrome/browser/dom_distiller/DomDistillerServiceFactory.java',
       'android/java/src/org/chromium/chrome/browser/dom_distiller/DomDistillerTabUtils.java',