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/*
* Copyright (C) 2017 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.launcher3.widget.custom;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProviderInfo;
import android.content.ComponentName;
import android.content.Context;
import android.content.res.TypedArray;
import android.content.res.XmlResourceParser;
import android.os.Parcel;
import android.os.Process;
import android.util.SparseArray;
import android.util.Xml;
import com.android.launcher3.LauncherAppWidgetInfo;
import com.android.launcher3.LauncherAppWidgetProviderInfo;
import com.android.launcher3.R;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import static com.android.launcher3.LauncherAppWidgetProviderInfo.CLS_CUSTOM_WIDGET_PREFIX;
/**
* Utility class to parse {@ink CustomAppWidgetProviderInfo} definitions from xml
*/
public class CustomWidgetParser {
private static List<LauncherAppWidgetProviderInfo> sCustomWidgets;
private static SparseArray<ComponentName> sWidgetsIdMap;
public static List<LauncherAppWidgetProviderInfo> getCustomWidgets(Context context) {
if (sCustomWidgets == null) {
// Synchronization not needed as it it safe to load multiple times
parseCustomWidgets(context);
}
return sCustomWidgets;
}
public static int getWidgetIdForCustomProvider(Context context, ComponentName provider) {
if (sWidgetsIdMap == null) {
parseCustomWidgets(context);
}
int index = sWidgetsIdMap.indexOfValue(provider);
if (index >= 0) {
return LauncherAppWidgetInfo.CUSTOM_WIDGET_ID - sWidgetsIdMap.keyAt(index);
} else {
return AppWidgetManager.INVALID_APPWIDGET_ID;
}
}
public static LauncherAppWidgetProviderInfo getWidgetProvider(Context context, int widgetId) {
if (sWidgetsIdMap == null || sCustomWidgets == null) {
parseCustomWidgets(context);
}
ComponentName cn = sWidgetsIdMap.get(LauncherAppWidgetInfo.CUSTOM_WIDGET_ID - widgetId);
for (LauncherAppWidgetProviderInfo info : sCustomWidgets) {
if (info.provider.equals(cn)) {
return info;
}
}
return null;
}
private static void parseCustomWidgets(Context context) {
ArrayList<LauncherAppWidgetProviderInfo> widgets = new ArrayList<>();
SparseArray<ComponentName> idMap = new SparseArray<>();
List<AppWidgetProviderInfo> providers = AppWidgetManager.getInstance(context)
.getInstalledProvidersForProfile(Process.myUserHandle());
if (providers.isEmpty()) {
sCustomWidgets = widgets;
sWidgetsIdMap = idMap;
return;
}
Parcel parcel = Parcel.obtain();
providers.get(0).writeToParcel(parcel, 0);
try (XmlResourceParser parser = context.getResources().getXml(R.xml.custom_widgets)) {
final int depth = parser.getDepth();
int type;
while (((type = parser.next()) != XmlPullParser.END_TAG ||
parser.getDepth() > depth) && type != XmlPullParser.END_DOCUMENT) {
if ((type == XmlPullParser.START_TAG) && "widget".equals(parser.getName())) {
TypedArray a = context.obtainStyledAttributes(
Xml.asAttributeSet(parser), R.styleable.CustomAppWidgetProviderInfo);
parcel.setDataPosition(0);
CustomAppWidgetProviderInfo info = newInfo(a, parcel, context);
widgets.add(info);
a.recycle();
idMap.put(info.providerId, info.provider);
}
}
} catch (IOException | XmlPullParserException e) {
throw new RuntimeException(e);
}
parcel.recycle();
sCustomWidgets = widgets;
sWidgetsIdMap = idMap;
}
private static CustomAppWidgetProviderInfo newInfo(TypedArray a, Parcel parcel, Context context) {
int providerId = a.getInt(R.styleable.CustomAppWidgetProviderInfo_providerId, 0);
CustomAppWidgetProviderInfo info = new CustomAppWidgetProviderInfo(parcel, false, providerId);
info.provider = new ComponentName(context.getPackageName(), CLS_CUSTOM_WIDGET_PREFIX + providerId);
info.label = a.getString(R.styleable.CustomAppWidgetProviderInfo_android_label);
info.initialLayout = a.getResourceId(R.styleable.CustomAppWidgetProviderInfo_android_initialLayout, 0);
info.icon = a.getResourceId(R.styleable.CustomAppWidgetProviderInfo_android_icon, 0);
info.previewImage = a.getResourceId(R.styleable.CustomAppWidgetProviderInfo_android_previewImage, 0);
info.resizeMode = a.getInt(R.styleable.CustomAppWidgetProviderInfo_android_resizeMode, 0);
info.spanX = a.getInt(R.styleable.CustomAppWidgetProviderInfo_numColumns, 1);
info.spanY = a.getInt(R.styleable.CustomAppWidgetProviderInfo_numRows, 1);
info.minSpanX = a.getInt(R.styleable.CustomAppWidgetProviderInfo_numMinColumns, 1);
info.minSpanY = a.getInt(R.styleable.CustomAppWidgetProviderInfo_numMinRows, 1);
return info;
}
}
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