QuickTileService: Implement and update from VpnService

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

4 files changed, 117 insertions, 1 deletions

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 11c6eecb..5ffcb928 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -24,7 +24,11 @@
             android:label="@string/edit_activity_title" />
         <activity
             android:name=".SettingsActivity"
-            android:label="@string/settings" />
+            android:label="@string/settings">
+            <intent-filter>
+                <action android:name="android.service.quicksettings.action.QS_TILE_PREFERENCES" />
+            </intent-filter>
+        </activity>
 
         <receiver android:name=".BootCompletedReceiver">
             <intent-filter>
@@ -33,6 +37,17 @@
         </receiver>
 
         <service
+            android:name=".QuickTileService"
+            android:icon="@drawable/ic_tile"
+            android:permission="android.permission.BIND_QUICK_SETTINGS_TILE">
+            <intent-filter>
+                <action android:name="android.service.quicksettings.action.QS_TILE" />
+            </intent-filter>
+            <meta-data
+                android:name="android.service.quicksettings.ACTIVE_TILE"
+                android:value="true" />
+        </service>
+        <service
             android:name=".VpnService"
             android:exported="false" />
     </application>
diff --git a/app/src/main/java/com/wireguard/android/QuickTileService.java b/app/src/main/java/com/wireguard/android/QuickTileService.java
new file mode 100644
index 00000000..dcd51b66
--- /dev/null
+++ b/app/src/main/java/com/wireguard/android/QuickTileService.java
@@ -0,0 +1,81 @@
+package com.wireguard.android;
+
+import android.annotation.TargetApi;
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.ServiceConnection;
+import android.content.SharedPreferences;
+import android.graphics.drawable.Icon;
+import android.os.Build;
+import android.os.IBinder;
+import android.preference.PreferenceManager;
+import android.service.quicksettings.Tile;
+import android.service.quicksettings.TileService;
+
+import com.wireguard.config.Config;
+
+@TargetApi(Build.VERSION_CODES.N)
+public class QuickTileService extends TileService {
+    private Config config;
+    private SharedPreferences preferences;
+    private VpnService service;
+
+    @Override
+    public void onClick() {
+        if (service != null && config != null) {
+            if (config.isEnabled())
+                service.disable(config.getName());
+            else
+                service.enable(config.getName());
+        }
+    }
+
+    @Override
+    public void onCreate() {
+        preferences = PreferenceManager.getDefaultSharedPreferences(this);
+        service = VpnService.getInstance();
+        if (service == null)
+            bindService(new Intent(this, VpnService.class), new ServiceConnectionCallbacks(),
+                    Context.BIND_AUTO_CREATE);
+    }
+
+    @Override
+    public void onStartListening() {
+        // Since this is an active tile, this only gets called when we want to update the tile.
+        final Tile tile = getQsTile();
+        final String configName = preferences.getString(VpnService.KEY_PRIMARY_CONFIG, null);
+        config = configName != null && service != null ? service.get(configName) : null;
+        if (config != null) {
+            tile.setLabel(config.getName());
+            final int state = config.isEnabled() ? Tile.STATE_ACTIVE : Tile.STATE_INACTIVE;
+            if (tile.getState() != state) {
+                // The icon must be changed every time the state changes, or the color won't change.
+                final Integer iconResource = (state == Tile.STATE_ACTIVE) ?
+                        R.drawable.ic_tile : R.drawable.ic_tile_disabled;
+                tile.setIcon(Icon.createWithResource(this, iconResource));
+                tile.setState(state);
+            }
+        } else {
+            tile.setIcon(Icon.createWithResource(this, R.drawable.ic_tile_disabled));
+            tile.setLabel(getString(R.string.loading));
+            tile.setState(Tile.STATE_UNAVAILABLE);
+        }
+        tile.updateTile();
+    }
+
+    private class ServiceConnectionCallbacks implements ServiceConnection {
+        @Override
+        public void onServiceConnected(final ComponentName component, final IBinder binder) {
+            // We don't actually need a binding, only notification that the service is started.
+            unbindService(this);
+            service = VpnService.getInstance();
+        }
+
+        @Override
+        public void onServiceDisconnected(final ComponentName component) {
+            // This can never happen; the service runs in the same thread as this service.
+            throw new IllegalStateException();
+        }
+    }
+}
diff --git a/app/src/main/java/com/wireguard/android/VpnService.java b/app/src/main/java/com/wireguard/android/VpnService.java
index e4523080..19040c56 100644
--- a/app/src/main/java/com/wireguard/android/VpnService.java
+++ b/app/src/main/java/com/wireguard/android/VpnService.java
@@ -1,12 +1,15 @@
 package com.wireguard.android;
 
 import android.app.Service;
+import android.content.ComponentName;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.os.AsyncTask;
 import android.os.Binder;
+import android.os.Build;
 import android.os.IBinder;
 import android.preference.PreferenceManager;
+import android.service.quicksettings.TileService;
 import android.util.Log;
 
 import com.wireguard.config.Config;
@@ -137,11 +140,13 @@ public class VpnService extends Service
                                           final String key) {
         if (!KEY_PRIMARY_CONFIG.equals(key))
             return;
+        boolean changed = false;
         final String newName = preferences.getString(key, null);
         if (primaryName != null && !primaryName.equals(newName)) {
             final Config oldConfig = configurations.get(primaryName);
             if (oldConfig != null)
                 oldConfig.setIsPrimary(false);
+            changed = true;
         }
         if (newName != null && !newName.equals(primaryName)) {
             final Config newConfig = configurations.get(newName);
@@ -149,8 +154,11 @@ public class VpnService extends Service
                 newConfig.setIsPrimary(true);
             else
                 preferences.edit().remove(KEY_PRIMARY_CONFIG).apply();
+            changed = true;
         }
         primaryName = newName;
+        if (changed)
+            updateTile();
     }
 
     @Override
@@ -198,6 +206,13 @@ public class VpnService extends Service
         new ConfigUpdater(oldConfig, config, wasEnabled).execute();
     }
 
+    private void updateTile() {
+        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N)
+            return;
+        Log.v(TAG, "Requesting quick tile update");
+        TileService.requestListeningState(this, new ComponentName(this, QuickTileService.class));
+    }
+
     private class ConfigDisabler extends AsyncTask<Void, Void, Boolean> {
         private final Config config;
 
@@ -219,6 +234,8 @@ public class VpnService extends Service
             config.setIsEnabled(false);
             enabledConfigs.remove(config.getName());
             preferences.edit().putStringSet(KEY_ENABLED_CONFIGS, enabledConfigs).apply();
+            if (config.getName().equals(primaryName))
+                updateTile();
         }
     }
 
@@ -243,6 +260,8 @@ public class VpnService extends Service
             config.setIsEnabled(true);
             enabledConfigs.add(config.getName());
             preferences.edit().putStringSet(KEY_ENABLED_CONFIGS, enabledConfigs).apply();
+            if (config.getName().equals(primaryName))
+                updateTile();
         }
     }
 
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 2c0ce517..4c781c21 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -18,6 +18,7 @@
     <string name="hint_optional">(optional)</string>
     <string name="hint_random">(random)</string>
     <string name="listen_port">Listen port</string>
+    <string name="loading">Loading</string>
     <string name="mtu">MTU</string>
     <string name="placeholder_text">No configuration selected</string>
     <string name="primary_config">Primary configuration</string>