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package com.android.launcher3.widget;
import android.appwidget.AppWidgetHostView;
import android.appwidget.AppWidgetManager;
import android.content.Context;
import android.graphics.Rect;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.View;
import com.android.launcher3.AppWidgetResizeFrame;
import com.android.launcher3.DragLayer;
import com.android.launcher3.Launcher;
import com.android.launcher3.LauncherAppWidgetProviderInfo;
import com.android.launcher3.compat.AppWidgetManagerCompat;
public class WidgetHostViewLoader {
private static final boolean DEBUG = false;
private static final String TAG = "WidgetHostViewLoader";
/* constants used for widget loading state. */
private static final int WIDGET_NO_CLEANUP_REQUIRED = -1;
private static final int WIDGET_PRELOAD_PENDING = 0;
private static final int WIDGET_BOUND = 1;
private static final int WIDGET_INFLATED = 2;
int mState = WIDGET_NO_CLEANUP_REQUIRED;
/* Runnables to handle inflation and binding. */
private Runnable mInflateWidgetRunnable = null;
private Runnable mBindWidgetRunnable = null;
/* Id of the widget being handled. */
int mWidgetLoadingId = -1;
PendingAddWidgetInfo mCreateWidgetInfo = null;
// TODO: technically, this class should not have to know the existence of the launcher.
private Launcher mLauncher;
private Handler mHandler;
public WidgetHostViewLoader(Launcher launcher) {
mLauncher = launcher;
mHandler = new Handler();
}
/**
* Start loading the widget.
*/
public void load(View v) {
if (mCreateWidgetInfo != null) {
// Just in case the cleanup process wasn't properly executed.
finish(false);
}
boolean status = false;
if (v.getTag() instanceof PendingAddWidgetInfo) {
mCreateWidgetInfo = new PendingAddWidgetInfo((PendingAddWidgetInfo) v.getTag());
status = preloadWidget(v, mCreateWidgetInfo);
}
if (DEBUG) {
Log.d(TAG, String.format("load started on [state=%d, status=%s]", mState, status));
}
}
/**
* Clean up according to what the last known state was.
* @param widgetIdUsed {@code true} if the widgetId was consumed which can happen only
* when view is fully inflated
*/
public void finish(boolean widgetIdUsed) {
if (DEBUG) {
Log.d(TAG, String.format("cancel on state [%d] widgetId=[%d]",
mState, mWidgetLoadingId));
}
// If the widget was not added, we may need to do further cleanup.
PendingAddWidgetInfo info = mCreateWidgetInfo;
mCreateWidgetInfo = null;
if (mState == WIDGET_PRELOAD_PENDING) {
// We never did any preloading, so just remove pending callbacks to do so
mHandler.removeCallbacks(mBindWidgetRunnable);
mHandler.removeCallbacks(mInflateWidgetRunnable);
} else if (mState == WIDGET_BOUND) {
// Delete the widget id which was allocated
if (mWidgetLoadingId != -1 && !info.isCustomWidget()) {
mLauncher.getAppWidgetHost().deleteAppWidgetId(mWidgetLoadingId);
}
// We never got around to inflating the widget, so remove the callback to do so.
mHandler.removeCallbacks(mInflateWidgetRunnable);
} else if (mState == WIDGET_INFLATED && !widgetIdUsed) {
// Delete the widget id which was allocated
if (mWidgetLoadingId != -1 && !info.isCustomWidget()) {
mLauncher.getAppWidgetHost().deleteAppWidgetId(mWidgetLoadingId);
}
// The widget was inflated and added to the DragLayer -- remove it.
AppWidgetHostView widget = info.boundWidget;
mLauncher.getDragLayer().removeView(widget);
}
setState(WIDGET_NO_CLEANUP_REQUIRED);
mWidgetLoadingId = -1;
}
private boolean preloadWidget(final View v, final PendingAddWidgetInfo info) {
final LauncherAppWidgetProviderInfo pInfo = info.info;
final Bundle options = pInfo.isCustomWidget ? null :
getDefaultOptionsForWidget(mLauncher, info);
// If there is a configuration activity, do not follow thru bound and inflate.
if (pInfo.configure != null) {
info.bindOptions = options;
return false;
}
setState(WIDGET_PRELOAD_PENDING);
mBindWidgetRunnable = new Runnable() {
@Override
public void run() {
if (pInfo.isCustomWidget) {
setState(WIDGET_BOUND);
return;
}
mWidgetLoadingId = mLauncher.getAppWidgetHost().allocateAppWidgetId();
if(AppWidgetManagerCompat.getInstance(mLauncher).bindAppWidgetIdIfAllowed(
mWidgetLoadingId, pInfo, options)) {
setState(WIDGET_BOUND);
}
}
};
mHandler.post(mBindWidgetRunnable);
mInflateWidgetRunnable = new Runnable() {
@Override
public void run() {
if (mState != WIDGET_BOUND) {
return;
}
AppWidgetHostView hostView = mLauncher.getAppWidgetHost().createView(
(Context) mLauncher, mWidgetLoadingId, pInfo);
info.boundWidget = hostView;
setState(WIDGET_INFLATED);
hostView.setVisibility(View.INVISIBLE);
int[] unScaledSize = mLauncher.getWorkspace().estimateItemSize(info, false);
// We want the first widget layout to be the correct size. This will be important
// for width size reporting to the AppWidgetManager.
DragLayer.LayoutParams lp = new DragLayer.LayoutParams(unScaledSize[0],
unScaledSize[1]);
lp.x = lp.y = 0;
lp.customPosition = true;
hostView.setLayoutParams(lp);
mLauncher.getDragLayer().addView(hostView);
v.setTag(info);
}
};
mHandler.post(mInflateWidgetRunnable);
return true;
}
public static Bundle getDefaultOptionsForWidget(Launcher launcher, PendingAddWidgetInfo info) {
Bundle options = null;
Rect rect = new Rect();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
AppWidgetResizeFrame.getWidgetSizeRanges(launcher, info.spanX, info.spanY, rect);
Rect padding = AppWidgetHostView.getDefaultPaddingForWidget(launcher,
info.componentName, null);
float density = launcher.getResources().getDisplayMetrics().density;
int xPaddingDips = (int) ((padding.left + padding.right) / density);
int yPaddingDips = (int) ((padding.top + padding.bottom) / density);
options = new Bundle();
options.putInt(AppWidgetManager.OPTION_APPWIDGET_MIN_WIDTH,
rect.left - xPaddingDips);
options.putInt(AppWidgetManager.OPTION_APPWIDGET_MIN_HEIGHT,
rect.top - yPaddingDips);
options.putInt(AppWidgetManager.OPTION_APPWIDGET_MAX_WIDTH,
rect.right - xPaddingDips);
options.putInt(AppWidgetManager.OPTION_APPWIDGET_MAX_HEIGHT,
rect.bottom - yPaddingDips);
}
return options;
}
private void setState(int state) {
if (DEBUG) {
Log.d(TAG, String.format(" state [%d -> %d]", mState, state));
}
mState = state;
}
}
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