Upstream NFC beam URL sharing code and add it to ChromeShell.

BUG=417543

Review URL: https://codereview.chromium.org/615213003

Cr-Commit-Position: refs/heads/master@{#297549}

10 files changed, 245 insertions, 0 deletions

diff --git a/chrome/android/java/src/org/chromium/chrome/browser/UmaBridge.java b/chrome/android/java/src/org/chromium/chrome/browser/UmaBridge.java
index 0e80f48..ed6fbe9 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/UmaBridge.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/UmaBridge.java
@@ -29,6 +29,19 @@ public class UmaBridge {
         nativeRecordUsingMenu(isByHwButton, isDragging);
     }
 
+    // Android beam
+    public static void beamCallbackSuccess() {
+        nativeRecordBeamCallbackSuccess();
+    }
+
+    public static void beamInvalidAppState() {
+        nativeRecordBeamInvalidAppState();
+    }
+
     private static native void nativeRecordMenuShow();
     private static native void nativeRecordUsingMenu(boolean isByHwButton, boolean isDragging);
+
+    // Android Beam
+    private static native void nativeRecordBeamInvalidAppState();
+    private static native void nativeRecordBeamCallbackSuccess();
 }
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/nfc/BeamCallback.java b/chrome/android/java/src/org/chromium/chrome/browser/nfc/BeamCallback.java
new file mode 100644
index 0000000..4811d20
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/nfc/BeamCallback.java
@@ -0,0 +1,151 @@
+// Copyright 2014 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.nfc;
+
+import android.app.Activity;
+import android.nfc.NdefMessage;
+import android.nfc.NdefRecord;
+import android.nfc.NfcAdapter.CreateNdefMessageCallback;
+import android.nfc.NfcAdapter.OnNdefPushCompleteCallback;
+import android.nfc.NfcEvent;
+import android.os.Build;
+import android.os.Handler;
+import android.os.Looper;
+import android.text.TextUtils;
+import android.widget.Toast;
+
+import org.chromium.base.ThreadUtils;
+import org.chromium.chrome.R;
+import org.chromium.chrome.browser.UmaBridge;
+
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+
+/**
+ * Beam callback that gets passed to Android to get triggered when devices are tapped to
+ * each other.
+ */
+class BeamCallback implements CreateNdefMessageCallback, OnNdefPushCompleteCallback {
+
+    private static class Status {
+        public final Integer errorStrID;
+        public final String result;
+
+        Status(Integer errorStrID) {
+            assert errorStrID != null;
+            this.errorStrID = errorStrID;
+            this.result = null;
+        }
+
+        Status(String result) {
+            assert result != null;
+            this.result = result;
+            this.errorStrID = null;
+        }
+    }
+
+    // In ICS returning null from createNdefMessage will cause beam to send our market
+    // link so we need to hook to the return from the beam overlay to display the error.
+    // But in SDK_INT >= 16, beam won't activate, so the hook wouldn't go off. (b/5943350)
+    private static final boolean NFC_BUGS_ACTIVE = Build.VERSION.SDK_INT < 16;
+
+    // Arbitrarily chosen interval to delay toast to allow NFC animations to finish
+    // and our app to return to foreground.
+    private static final int TOAST_ERROR_DELAY_MS = 400;
+
+    private final Activity mActivity;
+    private final BeamProvider mProvider;
+
+    // We use this to delay the error message in ICS because it would be hidden behind
+    // the system beam overlay. It is only accessed by the NFC thread
+    private Runnable mErrorRunnableIfBeamSent;
+
+    BeamCallback(Activity activity, BeamProvider provider) {
+        mActivity = activity;
+        mProvider = provider;
+    }
+
+    @Override
+    public NdefMessage createNdefMessage(NfcEvent event) {
+        // Default status is an error
+        Status status = new Status(R.string.nfc_beam_error_bad_url);
+        try {
+            status = ThreadUtils.runOnUiThread(new Callable<Status>() {
+                @Override
+                public Status call() {
+                    String url = mProvider.getTabUrlForBeam();
+                    if (url == null) return new Status(R.string.nfc_beam_error_overlay_active);
+                    if (!isValidUrl(url)) return new Status(R.string.nfc_beam_error_bad_url);
+                    return new Status(url);
+                }
+            }).get(2000, TimeUnit.MILLISECONDS); // Arbitrarily chosen timeout for query.
+        } catch (TimeoutException e) {
+            // Squelch this exception, we'll treat it as a bad tab
+        } catch (ExecutionException e) {
+            // And this
+        } catch (InterruptedException e) {
+            // And squelch this one too
+        }
+
+        if (status.errorStrID != null) {
+            onInvalidBeam(status.errorStrID);
+            return null;
+        }
+
+        UmaBridge.beamCallbackSuccess();
+        mErrorRunnableIfBeamSent = null;
+        return new NdefMessage(new NdefRecord[] {NdefRecord.createUri(status.result)});
+    }
+
+    /**
+     * Trigger an error about NFC if we don't want to send anything. Also
+     * records a UMA stat. On ICS we only show the error if they attempt to
+     * beam, since the recipient will receive the market link. On JB we'll
+     * always show the error, since the beam animation won't trigger, which
+     * could be confusing to the user.
+     *
+     * @param errorStringId The resid of the string to display as error.
+     */
+    private void onInvalidBeam(final int errorStringId) {
+        UmaBridge.beamInvalidAppState();
+        Runnable errorRunnable = new Runnable() {
+            @Override
+            public void run() {
+                Toast.makeText(mActivity, errorStringId, Toast.LENGTH_SHORT).show();
+            }
+        };
+        if (NFC_BUGS_ACTIVE) {
+            mErrorRunnableIfBeamSent = errorRunnable;
+        } else {
+            ThreadUtils.runOnUiThread(errorRunnable);
+        }
+    }
+
+    @Override
+    public void onNdefPushComplete(NfcEvent event) {
+        if (mErrorRunnableIfBeamSent != null) {
+            Handler h = new Handler(Looper.getMainLooper());
+            h.postDelayed(mErrorRunnableIfBeamSent, TOAST_ERROR_DELAY_MS);
+            mErrorRunnableIfBeamSent = null;
+        }
+    }
+
+    /**
+     * @return Whether given URL is valid and sharable via Beam.
+     */
+    private static boolean isValidUrl(String url) {
+        if (TextUtils.isEmpty(url)) return false;
+        try {
+            String urlProtocol = (new URL(url)).getProtocol();
+            return urlProtocol.matches("http|https");
+        } catch (MalformedURLException e) {
+            return false;
+        }
+    }
+}
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/nfc/BeamController.java b/chrome/android/java/src/org/chromium/chrome/browser/nfc/BeamController.java
new file mode 100644
index 0000000..105daa6
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/nfc/BeamController.java
@@ -0,0 +1,34 @@
+// Copyright 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.
+
+package org.chromium.chrome.browser.nfc;
+
+import android.app.Activity;
+import android.nfc.NfcAdapter;
+import android.util.Log;
+
+/**
+ * Initializes Android Beam (sharing URL via NFC) for devices that have NFC. If user taps their
+ * device with another Beam capable device, then Chrome gets the current URL, filters for security
+ * and returns the result to Android.
+ */
+public final class BeamController {
+    /**
+     * If the device has NFC, construct a BeamCallback and pass it to Android.
+     *
+     * @param activity Activity that is sending out beam messages.
+     * @param provider Provider that returns the URL that should be shared.
+     */
+    public static void registerForBeam(final Activity activity, final BeamProvider provider) {
+        final NfcAdapter nfcAdapter = NfcAdapter.getDefaultAdapter(activity);
+        if (nfcAdapter == null) return;
+        try {
+            final BeamCallback beamCallback = new BeamCallback(activity, provider);
+            nfcAdapter.setNdefPushMessageCallback(beamCallback, activity);
+            nfcAdapter.setOnNdefPushCompleteCallback(beamCallback, activity);
+        } catch (IllegalStateException e) {
+            Log.w("BeamController", "NFC registration failure. Can't retry, giving up.");
+        }
+    }
+}
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/nfc/BeamProvider.java b/chrome/android/java/src/org/chromium/chrome/browser/nfc/BeamProvider.java
new file mode 100644
index 0000000..4d95e20
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/nfc/BeamProvider.java
@@ -0,0 +1,15 @@
+// Copyright 2014 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.nfc;
+
+/**
+ * Interface for Activities that use Beam (sharing URL via NFC) controller.
+ */
+public interface BeamProvider {
+    /**
+     * @return URL of the current tab, null otherwise (e.g. user is in tab switcher).
+     */
+    String getTabUrlForBeam();
+}
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/nfc/OWNERS b/chrome/android/java/src/org/chromium/chrome/browser/nfc/OWNERS
new file mode 100644
index 0000000..577bf98
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/nfc/OWNERS
@@ -0,0 +1,2 @@
+aurimas@chromium.org
+newt@chromium.org
diff --git a/chrome/android/java/strings/android_chrome_strings.grd b/chrome/android/java/strings/android_chrome_strings.grd
index ecff791..9eabb65 100644
--- a/chrome/android/java/strings/android_chrome_strings.grd
+++ b/chrome/android/java/strings/android_chrome_strings.grd
@@ -389,6 +389,14 @@ You are signing in with a managed account and giving its administrator control o
         Settings
       </message>
 
+      <!-- Android NFC Beam strings -->
+      <message name="IDS_NFC_BEAM_ERROR_OVERLAY_ACTIVE" desc="Android Beam error - a tab is not in the foreground [CHAR-LIMIT=40]">
+        Select a tab to beam
+      </message>
+      <message name="IDS_NFC_BEAM_ERROR_BAD_URL" desc="Android Beam error - the current tab has an invalid url [CHAR-LIMIT=40]">
+        Can’t beam current tab
+      </message>
+
     </messages>
   </release>
 </grit>
diff --git a/chrome/android/shell/java/AndroidManifest.xml b/chrome/android/shell/java/AndroidManifest.xml
index e18acc7..aebe584 100644
--- a/chrome/android/shell/java/AndroidManifest.xml
+++ b/chrome/android/shell/java/AndroidManifest.xml
@@ -19,6 +19,7 @@
     <uses-permission android:name="android.permission.GET_ACCOUNTS"/>
     <uses-permission android:name="android.permission.INTERNET"/>
     <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS"/>
+    <uses-permission android:name="android.permission.NFC"/>
     <uses-permission android:name="android.permission.RECORD_AUDIO"/>
     <uses-permission android:name="android.permission.VIBRATE"/>
     <uses-permission android:name="android.permission.WAKE_LOCK"/>
diff --git a/chrome/android/shell/java/src/org/chromium/chrome/shell/ChromeShellActivity.java b/chrome/android/shell/java/src/org/chromium/chrome/shell/ChromeShellActivity.java
index 48627d2..3de8cf7 100644
--- a/chrome/android/shell/java/src/org/chromium/chrome/shell/ChromeShellActivity.java
+++ b/chrome/android/shell/java/src/org/chromium/chrome/shell/ChromeShellActivity.java
@@ -28,6 +28,8 @@ import org.chromium.chrome.browser.FileProviderHelper;
 import org.chromium.chrome.browser.appmenu.AppMenuHandler;
 import org.chromium.chrome.browser.appmenu.AppMenuPropertiesDelegate;
 import org.chromium.chrome.browser.dom_distiller.DomDistillerTabUtils;
+import org.chromium.chrome.browser.nfc.BeamController;
+import org.chromium.chrome.browser.nfc.BeamProvider;
 import org.chromium.chrome.browser.printing.PrintingControllerFactory;
 import org.chromium.chrome.browser.printing.TabPrinter;
 import org.chromium.chrome.browser.share.ShareHelper;
@@ -172,6 +174,15 @@ public class ChromeShellActivity extends Activity implements AppMenuPropertiesDe
         // SyncController that we have started.
         mSyncController.onStart();
         ContentUriUtils.setFileProviderUtil(new FileProviderHelper());
+
+        BeamController.registerForBeam(this, new BeamProvider() {
+            @Override
+            public String getTabUrlForBeam() {
+                ChromeShellTab tab = getActiveTab();
+                if (tab == null) return null;
+                return tab.getUrl();
+            }
+        });
     }
 
     @Override
diff --git a/chrome/android/sync_shell/java/AndroidManifest.xml b/chrome/android/sync_shell/java/AndroidManifest.xml
index 358b88b..e756c75 100644
--- a/chrome/android/sync_shell/java/AndroidManifest.xml
+++ b/chrome/android/sync_shell/java/AndroidManifest.xml
@@ -19,6 +19,7 @@
     <uses-permission android:name="android.permission.GET_ACCOUNTS"/>
     <uses-permission android:name="android.permission.INTERNET"/>
     <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS"/>
+    <uses-permission android:name="android.permission.NFC"/>
     <uses-permission android:name="android.permission.RECORD_AUDIO"/>
     <uses-permission android:name="android.permission.VIBRATE"/>
     <uses-permission android:name="android.permission.WAKE_LOCK"/>
diff --git a/chrome/browser/android/uma_bridge.cc b/chrome/browser/android/uma_bridge.cc
index ab345bb..4b2406e 100644
--- a/chrome/browser/android/uma_bridge.cc
+++ b/chrome/browser/android/uma_bridge.cc
@@ -36,6 +36,15 @@ static void RecordUsingMenu(JNIEnv*,
   }
 }
 
+// Android Beam
+static void RecordBeamCallbackSuccess(JNIEnv*, jclass) {
+  RecordAction(UserMetricsAction("MobileBeamCallbackSuccess"));
+}
+
+static void RecordBeamInvalidAppState(JNIEnv*, jclass) {
+  RecordAction(UserMetricsAction("MobileBeamInvalidAppState"));
+}
+
 namespace chrome {
 namespace android {