1 files changed, 238 insertions, 0 deletions
diff --git a/subsonic-android/src/net/sourceforge/subsonic/androidapp/provider/SubsonicAppWidgetProvider.java b/subsonic-android/src/net/sourceforge/subsonic/androidapp/provider/SubsonicAppWidgetProvider.java
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--- /dev/null
+++ b/subsonic-android/src/net/sourceforge/subsonic/androidapp/provider/SubsonicAppWidgetProvider.java
@@ -0,0 +1,238 @@
+/*
+ This file is part of Subsonic.
+
+ Subsonic is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Subsonic is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Subsonic.  If not, see <http://www.gnu.org/licenses/>.
+
+ Copyright 2010 (C) Sindre Mehus
+ */
+package net.sourceforge.subsonic.androidapp.provider;
+
+import android.app.PendingIntent;
+import android.appwidget.AppWidgetManager;
+import android.appwidget.AppWidgetProvider;
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.res.Resources;
+import android.graphics.Bitmap;
+import android.graphics.Bitmap.Config;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.graphics.PorterDuff.Mode;
+import android.graphics.PorterDuffXfermode;
+import android.graphics.Rect;
+import android.graphics.RectF;
+import android.os.Environment;
+import android.util.Log;
+import android.view.KeyEvent;
+import android.widget.RemoteViews;
+import net.sourceforge.subsonic.androidapp.R;
+import net.sourceforge.subsonic.androidapp.activity.DownloadActivity;
+import net.sourceforge.subsonic.androidapp.activity.MainActivity;
+import net.sourceforge.subsonic.androidapp.domain.MusicDirectory;
+import net.sourceforge.subsonic.androidapp.service.DownloadService;
+import net.sourceforge.subsonic.androidapp.service.DownloadServiceImpl;
+import net.sourceforge.subsonic.androidapp.util.FileUtil;
+
+/**
+ * Simple widget to show currently playing album art along
+ * with play/pause and next track buttons.
+ * <p/>
+ * Based on source code from the stock Android Music app.
+ *
+ * @author Sindre Mehus
+ */
+public class SubsonicAppWidgetProvider extends AppWidgetProvider {
+
+    private static SubsonicAppWidgetProvider instance;
+    private static final String TAG = SubsonicAppWidgetProvider.class.getSimpleName();
+
+    public static synchronized SubsonicAppWidgetProvider getInstance() {
+        if (instance == null) {
+            instance = new SubsonicAppWidgetProvider();
+        }
+        return instance;
+    }
+
+    @Override
+    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
+        defaultAppWidget(context, appWidgetIds);
+    }
+
+    /**
+     * Initialize given widgets to default state, where we launch Subsonic on default click
+     * and hide actions if service not running.
+     */
+    private void defaultAppWidget(Context context, int[] appWidgetIds) {
+        final Resources res = context.getResources();
+        final RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.appwidget);
+
+        views.setTextViewText(R.id.artist, res.getText(R.string.widget_initial_text));
+
+        linkButtons(context, views, false);
+        pushUpdate(context, appWidgetIds, views);
+    }
+
+    private void pushUpdate(Context context, int[] appWidgetIds, RemoteViews views) {
+        // Update specific list of appWidgetIds if given, otherwise default to all
+        final AppWidgetManager manager = AppWidgetManager.getInstance(context);
+        if (appWidgetIds != null) {
+            manager.updateAppWidget(appWidgetIds, views);
+        } else {
+            manager.updateAppWidget(new ComponentName(context, this.getClass()), views);
+        }
+    }
+
+    /**
+     * Handle a change notification coming over from {@link DownloadService}
+     */
+    public void notifyChange(Context context, DownloadService service, boolean playing) {
+        if (hasInstances(context)) {
+            performUpdate(context, service, null, playing);
+        }
+    }
+
+    /**
+     * Check against {@link AppWidgetManager} if there are any instances of this widget.
+     */
+    private boolean hasInstances(Context context) {
+        AppWidgetManager manager = AppWidgetManager.getInstance(context);
+        int[] appWidgetIds = manager.getAppWidgetIds(new ComponentName(context, getClass()));
+        return (appWidgetIds.length > 0);
+    }
+
+    /**
+     * Update all active widget instances by pushing changes
+     */
+    private void performUpdate(Context context, DownloadService service, int[] appWidgetIds, boolean playing) {
+        final Resources res = context.getResources();
+        final RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.appwidget);
+
+        MusicDirectory.Entry currentPlaying = service.getCurrentPlaying() == null ? null : service.getCurrentPlaying().getSong();
+        String title = currentPlaying == null ? null : currentPlaying.getTitle();
+        CharSequence artist = currentPlaying == null ? null : currentPlaying.getArtist();
+        CharSequence errorState = null;
+
+        // Show error message?
+        String status = Environment.getExternalStorageState();
+        if (status.equals(Environment.MEDIA_SHARED) ||
+            status.equals(Environment.MEDIA_UNMOUNTED)) {
+            errorState = res.getText(R.string.widget_sdcard_busy);
+        } else if (status.equals(Environment.MEDIA_REMOVED)) {
+            errorState = res.getText(R.string.widget_sdcard_missing);
+        } else if (currentPlaying == null) {
+            errorState = res.getText(R.string.widget_initial_text);
+        }
+
+        if (errorState != null) {
+            // Show error state to user
+        	views.setTextViewText(R.id.title,null);
+            views.setTextViewText(R.id.artist, errorState);
+            views.setImageViewResource(R.id.appwidget_coverart, R.drawable.appwidget_art_default);
+        } else {
+            // No error, so show normal titles
+            views.setTextViewText(R.id.title, title);
+            views.setTextViewText(R.id.artist, artist);
+        }
+
+        // Set correct drawable for pause state
+        if (playing) {
+            views.setImageViewResource(R.id.control_play, R.drawable.ic_appwidget_music_pause);
+        } else {
+            views.setImageViewResource(R.id.control_play, R.drawable.ic_appwidget_music_play);
+        }
+
+        // Set the cover art
+        try {
+            int size = context.getResources().getDrawable(R.drawable.appwidget_art_default).getIntrinsicHeight();
+            Bitmap bitmap = currentPlaying == null ? null : FileUtil.getAlbumArtBitmap(context, currentPlaying, size);
+
+            if (bitmap == null) {
+                // Set default cover art
+                views.setImageViewResource(R.id.appwidget_coverart, R.drawable.appwidget_art_unknown);
+            } else {
+                bitmap = getRoundedCornerBitmap(bitmap);
+                views.setImageViewBitmap(R.id.appwidget_coverart, bitmap);
+            }
+        } catch (Exception x) {
+            Log.e(TAG, "Failed to load cover art", x);
+            views.setImageViewResource(R.id.appwidget_coverart, R.drawable.appwidget_art_unknown);
+        }
+
+        // Link actions buttons to intents
+        linkButtons(context, views, currentPlaying != null);
+
+        pushUpdate(context, appWidgetIds, views);
+    }
+    
+    /**
+     * Round the corners of a bitmap for the cover art image
+     */
+    private static Bitmap getRoundedCornerBitmap(Bitmap bitmap) {
+        Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888);
+        Canvas canvas = new Canvas(output);
+
+        final int color = 0xff424242;
+        final Paint paint = new Paint();
+        final float roundPx = 10;
+
+        // Add extra width to the rect so the right side wont be rounded.
+        final Rect rect = new Rect(0, 0, bitmap.getWidth() + (int) roundPx, bitmap.getHeight());
+        final RectF rectF = new RectF(rect);
+
+        paint.setAntiAlias(true);
+        canvas.drawARGB(0, 0, 0, 0);
+        paint.setColor(color);
+        canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
+
+        paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
+        canvas.drawBitmap(bitmap, rect, rect, paint);
+
+        return output;
+    }
+
+    /**
+     * Link up various button actions using {@link PendingIntent}.
+     *
+     * @param playerActive True if player is active in background, which means
+     *                     widget click will launch {@link DownloadActivity},
+     *                     otherwise we launch {@link MainActivity}.
+     */
+    private void linkButtons(Context context, RemoteViews views, boolean playerActive) {
+
+        Intent intent = new Intent(context, playerActive ? DownloadActivity.class : MainActivity.class);
+        PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, 0);
+        views.setOnClickPendingIntent(R.id.appwidget_coverart, pendingIntent);
+        views.setOnClickPendingIntent(R.id.appwidget_top, pendingIntent);
+        
+        // Emulate media button clicks.
+        intent = new Intent("1");
+        intent.setComponent(new ComponentName(context, DownloadServiceImpl.class));
+        intent.putExtra(Intent.EXTRA_KEY_EVENT, new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE));
+        pendingIntent = PendingIntent.getService(context, 0, intent, 0);
+        views.setOnClickPendingIntent(R.id.control_play, pendingIntent);
+
+        intent = new Intent("2");  // Use a unique action name to ensure a different PendingIntent to be created.
+        intent.setComponent(new ComponentName(context, DownloadServiceImpl.class));
+        intent.putExtra(Intent.EXTRA_KEY_EVENT, new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_MEDIA_NEXT));
+        pendingIntent = PendingIntent.getService(context, 0, intent, 0);
+        views.setOnClickPendingIntent(R.id.control_next, pendingIntent);
+        
+        intent = new Intent("3");  // Use a unique action name to ensure a different PendingIntent to be created.
+        intent.setComponent(new ComponentName(context, DownloadServiceImpl.class));
+        intent.putExtra(Intent.EXTRA_KEY_EVENT, new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_MEDIA_PREVIOUS));
+        pendingIntent = PendingIntent.getService(context, 0, intent, 0);
+        views.setOnClickPendingIntent(R.id.control_previous, pendingIntent);
+    }
+}