Supporting custom widgets provided by launcher

-> This change provides integration for widgets provided by
   the launcher package which can run arbitrary code.

Change-Id: I6052da5c4afed7ee72e3b44d045b9c46f2d84c42

1 files changed, 89 insertions, 0 deletions

diff --git a/src/com/android/launcher3/LauncherAppWidgetProviderInfo.java b/src/com/android/launcher3/LauncherAppWidgetProviderInfo.java
new file mode 100644
index 000000000..e7f49b2ce
--- /dev/null
+++ b/src/com/android/launcher3/LauncherAppWidgetProviderInfo.java
@@ -0,0 +1,89 @@
+package com.android.launcher3;
+
+import android.appwidget.AppWidgetProviderInfo;
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.graphics.drawable.Drawable;
+import android.os.Parcel;
+
+import java.lang.reflect.Field;
+
+/**
+ * This class is a thin wrapper around the framework AppWidgetProviderInfo class. This class affords
+ * a common object for describing both framework provided AppWidgets as well as custom widgets
+ * (who's implementation is owned by the launcher). This object represents a widget type / class,
+ * as opposed to a widget instance, and so should not be confused with {@link LauncherAppWidgetInfo}
+ */
+public class LauncherAppWidgetProviderInfo extends AppWidgetProviderInfo {
+
+    public boolean isCustomWidget = false;
+    int spanX = -1;
+    int spanY = -1;
+    int minSpanX = -1;
+    int minSpanY = -1;
+
+    public static LauncherAppWidgetProviderInfo fromProviderInfo(Context context,
+            AppWidgetProviderInfo info) {
+
+        // In lieu of a public super copy constructor, we first write the AppWidgetProviderInfo
+        // into a parcel, and then construct a new LauncherAppWidgetProvider info from the
+        // associated super parcel constructor. This allows us to copy non-public members without
+        // using reflection.
+        Parcel p = Parcel.obtain();
+        info.writeToParcel(p, 0);
+        p.setDataPosition(0);
+        LauncherAppWidgetProviderInfo lawpi = new LauncherAppWidgetProviderInfo(p);
+
+        int[] minResizeSpan = Launcher.getMinSpanForWidget(context, lawpi);
+        int[] span = Launcher.getSpanForWidget(context, lawpi);
+
+        lawpi.spanX = span[0];
+        lawpi.spanY = span[1];
+        lawpi.minSpanX = minResizeSpan[0];
+        lawpi.minSpanY = minResizeSpan[1];
+
+        return lawpi;
+    }
+
+    public LauncherAppWidgetProviderInfo(Parcel in) {
+        super(in);
+    }
+
+    public LauncherAppWidgetProviderInfo(Context context, CustomAppWidget widget) {
+        isCustomWidget = true;
+
+        provider = new ComponentName(context, widget.getClass().getName());
+        icon = widget.getIcon();
+        label = widget.getLabel();
+        previewImage = widget.getPreviewImage();
+        initialLayout = widget.getWidgetLayout();
+        resizeMode = widget.getResizeMode();
+
+        spanX = widget.getSpanX();
+        spanY = widget.getSpanY();
+        minSpanX = widget.getMinSpanX();
+        minSpanY = widget.getMinSpanY();
+    }
+
+    public String getLabel(PackageManager packageManager) {
+        if (isCustomWidget) {
+            return label.toString().trim();
+        }
+        return super.loadLabel(packageManager);
+    }
+
+    public Drawable getIcon(Context context, IconCache cache) {
+        if (isCustomWidget) {
+            return cache.getFullResIcon(provider.getPackageName(), icon);
+        }
+        return super.loadIcon(context, cache.getFullResIconDpi());
+    }
+
+    public String toString() {
+        if (isCustomWidget) {
+            return "LauncherAppWidgetProviderInfo(" + provider + ")";
+        }
+        return super.toString();
+    }
+ }