/*
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* Copyright (C) 2009 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.launcher3;
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import static android.app.Activity.RESULT_CANCELED;
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import android.appwidget.AppWidgetHost;
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import android.appwidget.AppWidgetHostView;
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import android.appwidget.AppWidgetManager;
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import android.appwidget.AppWidgetProviderInfo;
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import android.content.ActivityNotFoundException;
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import android.content.Context;
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import android.content.Intent;
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import android.os.Handler;
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import android.util.SparseArray;
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import android.view.LayoutInflater;
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import android.widget.Toast;
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import com.android.launcher3.config.FeatureFlags;
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import com.android.launcher3.widget.DeferredAppWidgetHostView;
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import com.android.launcher3.widget.LauncherAppWidgetHostView;
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import java.util.ArrayList;
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/**
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* Specific {@link AppWidgetHost} that creates our {@link LauncherAppWidgetHostView}
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* which correctly captures all long-press events. This ensures that users can
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* always pick up and move widgets.
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*/
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public class LauncherAppWidgetHost extends AppWidgetHost {
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private static final int FLAG_LISTENING = 1;
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private static final int FLAG_RESUMED = 1 << 1;
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private static final int FLAG_LISTEN_IF_RESUMED = 1 << 2;
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public static final int APPWIDGET_HOST_ID = 1024;
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private final ArrayList<ProviderChangedListener> mProviderChangeListeners = new ArrayList<>();
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private final SparseArray<LauncherAppWidgetHostView> mViews = new SparseArray<>();
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private final Context mContext;
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private int mFlags = FLAG_RESUMED;
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public LauncherAppWidgetHost(Context context) {
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super(context, APPWIDGET_HOST_ID);
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mContext = context;
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}
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@Override
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protected LauncherAppWidgetHostView onCreateView(Context context, int appWidgetId,
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AppWidgetProviderInfo appWidget) {
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LauncherAppWidgetHostView view = new LauncherAppWidgetHostView(context);
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mViews.put(appWidgetId, view);
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return view;
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}
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@Override
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public void startListening() {
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if (FeatureFlags.GO_DISABLE_WIDGETS) {
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return;
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}
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mFlags |= FLAG_LISTENING;
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try {
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super.startListening();
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} catch (Exception e) {
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if (!Utilities.isBinderSizeError(e)) {
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throw new RuntimeException(e);
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}
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// We're willing to let this slide. The exception is being caused by the list of
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// RemoteViews which is being passed back. The startListening relationship will
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// have been established by this point, and we will end up populating the
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// widgets upon bind anyway. See issue 14255011 for more context.
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}
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// We go in reverse order and inflate any deferred widget
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for (int i = mViews.size() - 1; i >= 0; i--) {
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LauncherAppWidgetHostView view = mViews.valueAt(i);
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if (view instanceof DeferredAppWidgetHostView) {
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view.reInflate();
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}
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}
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}
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@Override
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public void stopListening() {
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if (FeatureFlags.GO_DISABLE_WIDGETS) {
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return;
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}
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mFlags &= ~FLAG_LISTENING;
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super.stopListening();
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}
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/**
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* Updates the resumed state of the host.
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* When a host is not resumed, it defers calls to startListening until host is resumed again.
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* But if the host was already listening, it will not call stopListening.
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*
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* @see #setListenIfResumed(boolean)
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*/
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public void setResumed(boolean isResumed) {
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if (isResumed == ((mFlags & FLAG_RESUMED) != 0)) {
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return;
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}
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if (isResumed) {
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mFlags |= FLAG_RESUMED;
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// Start listening if we were supposed to start listening on resume
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if ((mFlags & FLAG_LISTEN_IF_RESUMED) != 0 && (mFlags & FLAG_LISTENING) == 0) {
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startListening();
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}
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} else {
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mFlags &= ~FLAG_RESUMED;
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}
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}
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/**
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* Updates the listening state of the host. If the host is not resumed, startListening is
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* deferred until next resume.
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*
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* @see #setResumed(boolean)
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*/
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public void setListenIfResumed(boolean listenIfResumed) {
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if (listenIfResumed == ((mFlags & FLAG_LISTEN_IF_RESUMED) != 0)) {
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return;
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}
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if (listenIfResumed) {
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mFlags |= FLAG_LISTEN_IF_RESUMED;
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if ((mFlags & FLAG_RESUMED) != 0) {
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// If we are resumed, start listening immediately. Note we do not check for
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// duplicate calls before calling startListening as startListening is safe to call
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// multiple times.
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startListening();
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}
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} else {
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mFlags &= ~FLAG_LISTEN_IF_RESUMED;
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stopListening();
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}
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}
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@Override
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public int allocateAppWidgetId() {
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if (FeatureFlags.GO_DISABLE_WIDGETS) {
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return AppWidgetManager.INVALID_APPWIDGET_ID;
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}
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return super.allocateAppWidgetId();
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}
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public void addProviderChangeListener(ProviderChangedListener callback) {
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mProviderChangeListeners.add(callback);
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}
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public void removeProviderChangeListener(ProviderChangedListener callback) {
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mProviderChangeListeners.remove(callback);
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}
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protected void onProvidersChanged() {
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if (!mProviderChangeListeners.isEmpty()) {
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for (ProviderChangedListener callback : new ArrayList<>(mProviderChangeListeners)) {
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callback.notifyWidgetProvidersChanged();
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}
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}
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}
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public AppWidgetHostView createView(Context context, int appWidgetId,
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LauncherAppWidgetProviderInfo appWidget) {
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if (appWidget.isCustomWidget()) {
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LauncherAppWidgetHostView lahv = new LauncherAppWidgetHostView(context);
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LayoutInflater inflater = (LayoutInflater)
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context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
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inflater.inflate(appWidget.initialLayout, lahv);
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lahv.setAppWidget(0, appWidget);
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return lahv;
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} else if ((mFlags & FLAG_LISTENING) == 0) {
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DeferredAppWidgetHostView view = new DeferredAppWidgetHostView(context);
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view.setAppWidget(appWidgetId, appWidget);
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mViews.put(appWidgetId, view);
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return view;
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} else {
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try {
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return super.createView(context, appWidgetId, appWidget);
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} catch (Exception e) {
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if (!Utilities.isBinderSizeError(e)) {
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throw new RuntimeException(e);
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}
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// If the exception was thrown while fetching the remote views, let the view stay.
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// This will ensure that if the widget posts a valid update later, the view
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// will update.
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LauncherAppWidgetHostView view = mViews.get(appWidgetId);
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if (view == null) {
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view = onCreateView(mContext, appWidgetId, appWidget);
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}
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view.setAppWidget(appWidgetId, appWidget);
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view.switchToErrorView();
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return view;
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}
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}
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}
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/**
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* Called when the AppWidget provider for a AppWidget has been upgraded to a new apk.
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*/
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@Override
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protected void onProviderChanged(int appWidgetId, AppWidgetProviderInfo appWidget) {
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LauncherAppWidgetProviderInfo info = LauncherAppWidgetProviderInfo.fromProviderInfo(
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mContext, appWidget);
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super.onProviderChanged(appWidgetId, info);
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// The super method updates the dimensions of the providerInfo. Update the
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// launcher spans accordingly.
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info.initSpans(mContext);
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}
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@Override
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public void deleteAppWidgetId(int appWidgetId) {
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super.deleteAppWidgetId(appWidgetId);
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mViews.remove(appWidgetId);
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}
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@Override
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public void clearViews() {
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super.clearViews();
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mViews.clear();
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}
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public void startBindFlow(BaseActivity activity,
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int appWidgetId, AppWidgetProviderInfo info, int requestCode) {
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if (FeatureFlags.GO_DISABLE_WIDGETS) {
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sendActionCancelled(activity, requestCode);
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return;
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}
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Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_BIND)
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.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId)
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.putExtra(AppWidgetManager.EXTRA_APPWIDGET_PROVIDER, info.provider)
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.putExtra(AppWidgetManager.EXTRA_APPWIDGET_PROVIDER_PROFILE, info.getProfile());
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// TODO: we need to make sure that this accounts for the options bundle.
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// intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_OPTIONS, options);
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activity.startActivityForResult(intent, requestCode);
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}
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public void startConfigActivity(BaseActivity activity, int widgetId, int requestCode) {
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if (FeatureFlags.GO_DISABLE_WIDGETS) {
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sendActionCancelled(activity, requestCode);
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return;
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}
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try {
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startAppWidgetConfigureActivityForResult(activity, widgetId, 0, requestCode, null);
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} catch (ActivityNotFoundException | SecurityException e) {
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Toast.makeText(activity, R.string.activity_not_found, Toast.LENGTH_SHORT).show();
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sendActionCancelled(activity, requestCode);
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}
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}
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private void sendActionCancelled(final BaseActivity activity, final int requestCode) {
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new Handler().post(() -> activity.onActivityResult(requestCode, RESULT_CANCELED, null));
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}
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/**
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* Listener for getting notifications on provider changes.
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*/
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public interface ProviderChangedListener {
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void notifyWidgetProvidersChanged();
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}
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}
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