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package com.android.launcher3.graphics;
import static com.android.launcher3.Utilities.getPrefs;
import static com.android.launcher3.util.Executors.UI_HELPER_EXECUTOR;
import static com.android.launcher3.util.Themes.KEY_THEMED_ICONS;
import static com.android.launcher3.util.Themes.isThemedIconEnabled;
import android.annotation.TargetApi;
import android.content.ContentProvider;
import android.content.ContentValues;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.database.MatrixCursor;
import android.net.Uri;
import android.os.Binder;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.os.IBinder.DeathRecipient;
import android.os.Message;
import android.os.Messenger;
import android.util.ArrayMap;
import android.util.Log;
import com.android.launcher3.InvariantDeviceProfile;
import com.android.launcher3.InvariantDeviceProfile.GridOption;
import com.android.launcher3.Utilities;
import com.android.launcher3.config.FeatureFlags;
import com.android.launcher3.util.Executors;
/**
* Exposes various launcher grid options and allows the caller to change them.
* APIs:
* /list_options: List the various available grip options, has following columns
* name: name of the grid
* rows: number of rows in the grid
* cols: number of columns in the grid
* preview_count: number of previews available for this grid option. The preview uri
* looks like /preview/<grid-name>/<preview index starting with 0>
* is_default: true if this grid is currently active
*
* /preview: Opens a file stream for the grid preview
*
* /default_grid: Call update to set the current grid, with values
* name: name of the grid to apply
*/
public class GridCustomizationsProvider extends ContentProvider {
private static final String TAG = "GridCustomizationsProvider";
private static final String KEY_NAME = "name";
private static final String KEY_ROWS = "rows";
private static final String KEY_COLS = "cols";
private static final String KEY_PREVIEW_COUNT = "preview_count";
private static final String KEY_IS_DEFAULT = "is_default";
private static final String KEY_LIST_OPTIONS = "/list_options";
private static final String KEY_DEFAULT_GRID = "/default_grid";
private static final String METHOD_GET_PREVIEW = "get_preview";
private static final String GET_ICON_THEMED = "/get_icon_themed";
private static final String SET_ICON_THEMED = "/set_icon_themed";
private static final String ICON_THEMED = "/icon_themed";
private static final String BOOLEAN_VALUE = "boolean_value";
private static final String KEY_SURFACE_PACKAGE = "surface_package";
private static final String KEY_CALLBACK = "callback";
private final ArrayMap<IBinder, PreviewLifecycleObserver> mActivePreviews = new ArrayMap<>();
@Override
public boolean onCreate() {
return true;
}
@Override
public Cursor query(Uri uri, String[] projection, String selection,
String[] selectionArgs, String sortOrder) {
switch (uri.getPath()) {
case KEY_LIST_OPTIONS: {
MatrixCursor cursor = new MatrixCursor(new String[] {
KEY_NAME, KEY_ROWS, KEY_COLS, KEY_PREVIEW_COUNT, KEY_IS_DEFAULT});
InvariantDeviceProfile idp = InvariantDeviceProfile.INSTANCE.get(getContext());
for (GridOption gridOption : idp.parseAllGridOptions(getContext())) {
cursor.newRow()
.add(KEY_NAME, gridOption.name)
.add(KEY_ROWS, gridOption.numRows)
.add(KEY_COLS, gridOption.numColumns)
.add(KEY_PREVIEW_COUNT, 1)
.add(KEY_IS_DEFAULT, idp.numColumns == gridOption.numColumns
&& idp.numRows == gridOption.numRows);
}
return cursor;
}
case GET_ICON_THEMED:
case ICON_THEMED: {
MatrixCursor cursor = new MatrixCursor(new String[] {BOOLEAN_VALUE});
cursor.newRow().add(BOOLEAN_VALUE, isThemedIconEnabled(getContext()) ? 1 : 0);
return cursor;
}
default:
return null;
}
}
@Override
public String getType(Uri uri) {
return "vnd.android.cursor.dir/launcher_grid";
}
@Override
public Uri insert(Uri uri, ContentValues initialValues) {
return null;
}
@Override
public int delete(Uri uri, String selection, String[] selectionArgs) {
return 0;
}
@Override
public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
switch (uri.getPath()) {
case KEY_DEFAULT_GRID: {
String gridName = values.getAsString(KEY_NAME);
InvariantDeviceProfile idp = InvariantDeviceProfile.INSTANCE.get(getContext());
// Verify that this is a valid grid option
GridOption match = null;
for (GridOption option : idp.parseAllGridOptions(getContext())) {
if (option.name.equals(gridName)) {
match = option;
break;
}
}
if (match == null) {
return 0;
}
idp.setCurrentGrid(getContext(), gridName);
return 1;
}
case ICON_THEMED:
case SET_ICON_THEMED: {
if (FeatureFlags.ENABLE_THEMED_ICONS.get()) {
getPrefs(getContext()).edit()
.putBoolean(KEY_THEMED_ICONS, values.getAsBoolean(BOOLEAN_VALUE))
.apply();
}
return 1;
}
default:
return 0;
}
}
@Override
public Bundle call(String method, String arg, Bundle extras) {
if (getContext().checkPermission("android.permission.BIND_WALLPAPER",
Binder.getCallingPid(), Binder.getCallingUid())
!= PackageManager.PERMISSION_GRANTED) {
return null;
}
if (!Utilities.ATLEAST_R || !METHOD_GET_PREVIEW.equals(method)) {
return null;
}
return getPreview(extras);
}
@TargetApi(Build.VERSION_CODES.R)
private synchronized Bundle getPreview(Bundle request) {
PreviewLifecycleObserver observer = null;
try {
PreviewSurfaceRenderer renderer = new PreviewSurfaceRenderer(getContext(), request);
// Destroy previous
destroyObserver(mActivePreviews.get(renderer.getHostToken()));
observer = new PreviewLifecycleObserver(renderer);
mActivePreviews.put(renderer.getHostToken(), observer);
renderer.loadAsync();
renderer.getHostToken().linkToDeath(observer, 0);
Bundle result = new Bundle();
result.putParcelable(KEY_SURFACE_PACKAGE, renderer.getSurfacePackage());
Messenger messenger =
new Messenger(new Handler(UI_HELPER_EXECUTOR.getLooper(), observer));
Message msg = Message.obtain();
msg.replyTo = messenger;
result.putParcelable(KEY_CALLBACK, msg);
return result;
} catch (Exception e) {
Log.e(TAG, "Unable to generate preview", e);
if (observer != null) {
destroyObserver(observer);
}
return null;
}
}
private synchronized void destroyObserver(PreviewLifecycleObserver observer) {
if (observer == null || observer.destroyed) {
return;
}
observer.destroyed = true;
observer.renderer.getHostToken().unlinkToDeath(observer, 0);
Executors.MAIN_EXECUTOR.execute(observer.renderer::destroy);
PreviewLifecycleObserver cached = mActivePreviews.get(observer.renderer.getHostToken());
if (cached == observer) {
mActivePreviews.remove(observer.renderer.getHostToken());
}
}
private class PreviewLifecycleObserver implements Handler.Callback, DeathRecipient {
public final PreviewSurfaceRenderer renderer;
public boolean destroyed = false;
PreviewLifecycleObserver(PreviewSurfaceRenderer renderer) {
this.renderer = renderer;
}
@Override
public boolean handleMessage(Message message) {
destroyObserver(this);
return true;
}
@Override
public void binderDied() {
destroyObserver(this);
}
}
}
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