New widget picker for keyguard widgets

New layout for widget picker is still not up to
final design, but this change prepares all the
backend work

Also, remove use of features filter from the
picker, since this is being removed from the API

Change-Id: I9b332e22cf34b98c20c720602c920d28aed01d6c

1 files changed, 182 insertions, 0 deletions

diff --git a/src/com/android/settings/AppWidgetLoader.java b/src/com/android/settings/AppWidgetLoader.java
new file mode 100644
index 0000000..9155e60
--- /dev/null
+++ b/src/com/android/settings/AppWidgetLoader.java
@@ -0,0 +1,182 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings;
+
+import android.appwidget.AppWidgetManager;
+import android.appwidget.AppWidgetProviderInfo;
+import android.content.Context;
+import android.content.Intent;
+import android.os.Bundle;
+import android.os.Parcelable;
+import android.util.Log;
+
+import java.text.Collator;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
+
+public class AppWidgetLoader<Item extends AppWidgetLoader.LabelledItem> {
+    private static final String TAG = "AppWidgetAdapter";
+    private static final boolean LOGD = AppWidgetPickActivity.LOGD;
+
+    private Context mContext;
+    private AppWidgetManager mAppWidgetManager;
+    ItemConstructor<Item> mItemConstructor;
+
+    interface LabelledItem {
+        CharSequence getLabel();
+    }
+
+    public AppWidgetLoader(Context context, AppWidgetManager appWidgetManager,
+            ItemConstructor<Item> itemConstructor) {
+        mContext = context;
+        mAppWidgetManager = appWidgetManager;
+        mItemConstructor = itemConstructor;
+    }
+
+    /**
+     * Create list entries for any custom widgets requested through
+     * {@link AppWidgetManager#EXTRA_CUSTOM_INFO}.
+     */
+    void putCustomAppWidgets(List<Item> items, Intent intent) {
+        // get and validate the extras they gave us
+        ArrayList<AppWidgetProviderInfo> customInfo = null;
+        ArrayList<Bundle> customExtras = null;
+        try_custom_items: {
+            customInfo = intent.getParcelableArrayListExtra(AppWidgetManager.EXTRA_CUSTOM_INFO);
+            if (customInfo == null || customInfo.size() == 0) {
+                Log.i(TAG, "EXTRA_CUSTOM_INFO not present.");
+                break try_custom_items;
+            }
+
+            int customInfoSize = customInfo.size();
+            for (int i=0; i<customInfoSize; i++) {
+                Parcelable p = customInfo.get(i);
+                if (p == null || !(p instanceof AppWidgetProviderInfo)) {
+                    customInfo = null;
+                    Log.e(TAG, "error using EXTRA_CUSTOM_INFO index=" + i);
+                    break try_custom_items;
+                }
+            }
+
+            customExtras = intent.getParcelableArrayListExtra(AppWidgetManager.EXTRA_CUSTOM_EXTRAS);
+            if (customExtras == null) {
+                customInfo = null;
+                Log.e(TAG, "EXTRA_CUSTOM_INFO without EXTRA_CUSTOM_EXTRAS");
+                break try_custom_items;
+            }
+
+            int customExtrasSize = customExtras.size();
+            if (customInfoSize != customExtrasSize) {
+                customInfo = null;
+                customExtras = null;
+                Log.e(TAG, "list size mismatch: EXTRA_CUSTOM_INFO: " + customInfoSize
+                        + " EXTRA_CUSTOM_EXTRAS: " + customExtrasSize);
+                break try_custom_items;
+            }
+
+
+            for (int i=0; i<customExtrasSize; i++) {
+                Parcelable p = customExtras.get(i);
+                if (p == null || !(p instanceof Bundle)) {
+                    customInfo = null;
+                    customExtras = null;
+                    Log.e(TAG, "error using EXTRA_CUSTOM_EXTRAS index=" + i);
+                    break try_custom_items;
+                }
+            }
+        }
+
+        if (LOGD) Log.d(TAG, "Using " + customInfo.size() + " custom items");
+        putAppWidgetItems(customInfo, customExtras, items, 0, true);
+    }
+
+
+    /**
+     * Create list entries for the given {@link AppWidgetProviderInfo} widgets,
+     * inserting extras if provided.
+     */
+    void putAppWidgetItems(List<AppWidgetProviderInfo> appWidgets,
+            List<Bundle> customExtras, List<Item> items, int categoryFilter,
+            boolean ignoreFilter) {
+        if (appWidgets == null) return;
+        final int size = appWidgets.size();
+        for (int i = 0; i < size; i++) {
+            AppWidgetProviderInfo info = appWidgets.get(i);
+
+            // We remove any widgets whose category isn't included in the filter
+            if (!ignoreFilter && (info.widgetCategory & categoryFilter) == 0) {
+                continue;
+            }
+
+            Item item = mItemConstructor.createItem(mContext, info,
+                    customExtras != null ? customExtras.get(i) : null);
+
+            items.add(item);
+        }
+    }
+
+    public interface ItemConstructor<Item> {
+        Item createItem(Context context, AppWidgetProviderInfo info, Bundle extras);
+    }
+
+
+    /**
+     * Build and return list of items to be shown in dialog. This will mix both
+     * installed {@link AppWidgetProviderInfo} and those provided through
+     * {@link AppWidgetManager#EXTRA_CUSTOM_INFO}, sorting them alphabetically.
+     */
+    protected List<Item> getItems(Intent intent) {
+        boolean sortCustomAppWidgets =
+                intent.getBooleanExtra(AppWidgetManager.EXTRA_CUSTOM_SORT, true);
+
+        List<Item> items = new ArrayList<Item>();
+
+        // Default category is home screen
+        int categoryFilter = intent.getIntExtra(AppWidgetManager.EXTRA_CATEGORY_FILTER,
+                AppWidgetProviderInfo.WIDGET_CATEGORY_HOME_SCREEN);
+
+        putInstalledAppWidgets(items, categoryFilter);
+
+        // Sort all items together by label
+        if (sortCustomAppWidgets) {
+            putCustomAppWidgets(items, intent);
+        }
+        Collections.sort(items, new Comparator<Item>() {
+            Collator mCollator = Collator.getInstance();
+
+            public int compare(Item lhs, Item rhs) {
+                return mCollator.compare(lhs.getLabel(), rhs.getLabel());
+            }
+        });
+        if (!sortCustomAppWidgets) {
+            List<Item> customItems = new ArrayList<Item>();
+            putCustomAppWidgets(customItems, intent);
+            items.addAll(customItems);
+        }
+        return items;
+    }
+
+    /**
+     * Create list entries for installed {@link AppWidgetProviderInfo} widgets.
+     */
+    void putInstalledAppWidgets(List<Item> items, int categoryFilter) {
+        List<AppWidgetProviderInfo> installed = mAppWidgetManager.getInstalledProviders();
+        putAppWidgetItems(installed, null, items, categoryFilter, false);
+    }
+}