Initial changes to allow resolution of arbitrary clip data to widgets that support them.

Change-Id: Id5dfa8436a5bf6eb7bd300ec603911a9d3698de3

src/com/android/launcher2/InstallWidgetReceiver.java

@@ -16,6 +16,25 @@
 
 package com.android.launcher2;
 
+import java.util.List;
+
+import android.appwidget.AppWidgetProviderInfo;
+import android.content.ClipData;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.database.DataSetObserver;
+import android.graphics.drawable.Drawable;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ImageView;
+import android.widget.ListAdapter;
+import android.widget.TextView;
+
+import com.android.launcher.R;
+
 
 /**
  * We will likely flesh this out later, to handle allow external apps to place widgets, but for now,
@@ -24,11 +43,153 @@ package com.android.launcher2;
 public class InstallWidgetReceiver {
     public static final String ACTION_INSTALL_WIDGET =
             "com.android.launcher.action.INSTALL_WIDGET";
+    public static final String ACTION_SUPPORTS_CLIPDATA_MIMETYPE =
+            "com.android.launcher.action.SUPPORTS_CLIPDATA_MIMETYPE";
 
     // Currently not exposed.  Put into Intent when we want to make it public.
     // TEMP: Should we call this "EXTRA_APPWIDGET_PROVIDER"?
     public static final String EXTRA_APPWIDGET_COMPONENT =
         "com.android.launcher.extra.widget.COMPONENT";
+    public static final String EXTRA_APPWIDGET_CONFIGURATION_DATA_MIME_TYPE =
+        "com.android.launcher.extra.widget.CONFIGURATION_DATA_MIME_TYPE";
     public static final String EXTRA_APPWIDGET_CONFIGURATION_DATA =
         "com.android.launcher.extra.widget.CONFIGURATION_DATA";
+
+    /**
+     * A simple data class that contains per-item information that the adapter below can reference.
+     */
+    public static class WidgetMimeTypeHandlerData {
+        public ResolveInfo resolveInfo;
+        public AppWidgetProviderInfo widgetInfo;
+
+        public WidgetMimeTypeHandlerData(ResolveInfo rInfo, AppWidgetProviderInfo wInfo) {
+            resolveInfo = rInfo;
+            widgetInfo = wInfo;
+        }
+    }
+
+    /**
+     * The ListAdapter which presents all the valid widgets that can be created for a given drop.
+     */
+    public static class WidgetListAdapter implements ListAdapter, DialogInterface.OnClickListener {
+        private LayoutInflater mInflater;
+        private Launcher mLauncher;
+        private String mMimeType;
+        private ClipData mClipData;
+        private List<WidgetMimeTypeHandlerData> mActivities;
+        private CellLayout mTargetLayout;
+        private int mTargetLayoutScreen;
+        private int[] mTargetLayoutPos;
+
+        public WidgetListAdapter(Launcher l, String mimeType, ClipData data,
+                List<WidgetMimeTypeHandlerData> list, CellLayout target,
+                int targetScreen, int[] targetPos) {
+            mLauncher = l;
+            mMimeType = mimeType;
+            mClipData = data;
+            mActivities = list;
+            mTargetLayout = target;
+            mTargetLayoutScreen = targetScreen;
+            mTargetLayoutPos = targetPos;
+        }
+
+        @Override
+        public void registerDataSetObserver(DataSetObserver observer) {
+        }
+
+        @Override
+        public void unregisterDataSetObserver(DataSetObserver observer) {
+        }
+
+        @Override
+        public int getCount() {
+            return mActivities.size();
+        }
+
+        @Override
+        public Object getItem(int position) {
+            return null;
+        }
+
+        @Override
+        public long getItemId(int position) {
+            return position;
+        }
+
+        @Override
+        public boolean hasStableIds() {
+            return true;
+        }
+
+        @Override
+        public View getView(int position, View convertView, ViewGroup parent) {
+            final Context context = parent.getContext();
+            final PackageManager packageManager = context.getPackageManager();
+
+            // Lazy-create inflater
+            if (mInflater == null) {
+                mInflater = LayoutInflater.from(context);
+            }
+
+            // Use the convert-view where possible
+            if (convertView == null) {
+                convertView = mInflater.inflate(R.layout.external_widget_drop_list_item, parent,
+                        false);
+            }
+
+            final WidgetMimeTypeHandlerData data = mActivities.get(position);
+            final ResolveInfo resolveInfo = data.resolveInfo;
+            final AppWidgetProviderInfo widgetInfo = data.widgetInfo;
+
+            // Set the icon
+            Drawable d = resolveInfo.loadIcon(packageManager);
+            ImageView i = (ImageView) convertView.findViewById(R.id.provider_icon);
+            i.setImageDrawable(d);
+
+            // Set the text
+            final CharSequence component = resolveInfo.loadLabel(packageManager);
+            final int[] widgetSpan = new int[2];
+            mTargetLayout.rectToCell(widgetInfo.minWidth, widgetInfo.minHeight, widgetSpan);
+            TextView t = (TextView) convertView.findViewById(R.id.provider);
+            t.setText(context.getString(R.string.external_drop_widget_pick_format,
+                    component, widgetSpan[0], widgetSpan[1]));
+
+            return convertView;
+        }
+
+        @Override
+        public int getItemViewType(int position) {
+            return 0;
+        }
+
+        @Override
+        public int getViewTypeCount() {
+            return 1;
+        }
+
+        @Override
+        public boolean isEmpty() {
+            return mActivities.isEmpty();
+        }
+
+        @Override
+        public boolean areAllItemsEnabled() {
+            return false;
+        }
+
+        @Override
+        public boolean isEnabled(int position) {
+            return true;
+        }
+
+        @Override
+        public void onClick(DialogInterface dialog, int which) {
+            final LauncherModel model = mLauncher.getModel();
+            final AppWidgetProviderInfo widgetInfo = mActivities.get(which).widgetInfo;
+
+            final PendingAddWidgetInfo createInfo = new PendingAddWidgetInfo(widgetInfo, mMimeType,
+                    mClipData);
+            mLauncher.addAppWidgetFromDrop(createInfo, mTargetLayoutScreen, mTargetLayoutPos);
+        }
+    }
 }