/* -*- Mode: java; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* xscreensaver, Copyright (c) 2016-2017 Jamie Zawinski <jwz@jwz.org>
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation. No representations are made about the suitability of this
* software for any purpose. It is provided "as is" without express or
* implied warranty.
*
* The superclass of every saver's Daydream.
*
* Each Daydream needs a distinct subclass in order to show up in the list.
* We know which saver we are running by the subclass name; we know which
* API to use by how the subclass calls super().
*/
package org.jwz.xscreensaver;
import android.view.Display;
import android.view.Surface;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.view.KeyEvent;
import android.service.dreams.DreamService;
import android.view.GestureDetector;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.os.Message;
import android.os.Handler;
import android.os.Looper;
import android.util.Log;
public class Daydream extends DreamService {
private class SaverView extends SurfaceView
implements SurfaceHolder.Callback {
private boolean initTried = false;
private jwxyz jwxyz_obj;
private GestureDetector detector;
private Runnable on_quit = new Runnable() {
@Override
public void run() {
finish(); // Exit the Daydream
}
};
SaverView () {
super (Daydream.this);
getHolder().addCallback(this);
}
@Override
public void surfaceChanged (SurfaceHolder holder, int format,
int width, int height) {
if (width == 0 || height == 0) {
detector = null;
jwxyz_obj.close();
jwxyz_obj = null;
}
Log.d ("xscreensaver",
String.format("surfaceChanged: %dx%d", width, height));
/*
double r = 0;
Display d = view.getDisplay();
if (d != null) {
switch (d.getRotation()) {
case Surface.ROTATION_90: r = 90; break;
case Surface.ROTATION_180: r = 180; break;
case Surface.ROTATION_270: r = 270; break;
}
}
*/
if (jwxyz_obj == null) {
jwxyz_obj = new jwxyz (jwxyz.saverNameOf (Daydream.this),
Daydream.this, screenshot, width, height,
holder.getSurface(), on_quit);
detector = new GestureDetector (Daydream.this, jwxyz_obj);
} else {
jwxyz_obj.resize (width, height);
}
jwxyz_obj.start();
}
@Override
public void surfaceCreated (SurfaceHolder holder) {
if (!initTried) {
initTried = true;
} else {
if (jwxyz_obj != null) {
jwxyz_obj.close();
jwxyz_obj = null;
}
}
}
@Override
public void surfaceDestroyed (SurfaceHolder holder) {
if (jwxyz_obj != null) {
jwxyz_obj.close();
jwxyz_obj = null;
}
}
@Override
public boolean onTouchEvent (MotionEvent event) {
detector.onTouchEvent (event);
if (event.getAction() == MotionEvent.ACTION_UP)
jwxyz_obj.dragEnded (event);
return true;
}
@Override
public boolean onKeyDown (int keyCode, KeyEvent event) {
// In the emulator, this doesn't receive keyboard arrow keys, PgUp, etc.
// Some other keys like "Home" are interpreted before we get here, and
// function keys do weird shit.
// TODO: Does this still work? And is the above still true?
if (view.jwxyz_obj != null)
view.jwxyz_obj.sendKeyEvent (event);
return true;
}
}
private SaverView view;
Bitmap screenshot;
private void LOG (String fmt, Object... args) {
Log.d ("xscreensaver",
this.getClass().getSimpleName() + ": " +
String.format (fmt, args));
}
protected Daydream () {
super();
}
// Called when jwxyz_abort() is called, or other exceptions are thrown.
//
/*
@Override
public void uncaughtException (Thread thread, Throwable ex) {
renderer = null;
String err = ex.toString();
LOG ("Caught exception: %s", err);
this.finish(); // Exit the Daydream
final AlertDialog.Builder b = new AlertDialog.Builder(this);
b.setMessage (err);
b.setCancelable (false);
b.setPositiveButton ("Bummer",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface d, int id) {
}
});
// #### This isn't working:
// "Attempted to add window with non-application token"
// "Unable to add window -- token null is not for an application"
// I think I need to get an "Activity" to run it on somehow?
new Handler (Looper.getMainLooper()).post (new Runnable() {
public void run() {
AlertDialog alert = b.create();
alert.setTitle (this.getClass().getSimpleName() + " crashed");
alert.setIcon(android.R.drawable.ic_dialog_alert);
alert.show();
}
});
old_handler.uncaughtException (thread, ex);
}
*/
@Override
public void onAttachedToWindow() {
super.onAttachedToWindow();
setInteractive (true);
setFullscreen (true);
saveScreenshot();
view = new SaverView ();
setContentView (view);
}
public void onDreamingStarted() {
super.onDreamingStarted();
// view.jwxyz_obj.start();
}
public void onDreamingStopped() {
super.onDreamingStopped();
view.jwxyz_obj.pause();
}
public void onDetachedFromWindow() {
super.onDetachedFromWindow();
try {
if (view.jwxyz_obj != null)
view.jwxyz_obj.pause();
} catch (Exception exc) {
// Fun fact: Android swallows exceptions coming from here, then crashes
// elsewhere.
LOG ("onDetachedFromWindow: %s", exc.toString());
throw exc;
}
}
// At startup, before we have blanked the screen, save a screenshot
// for later use by the hacks.
//
private void saveScreenshot() {
View view = getWindow().getDecorView().getRootView();
if (view == null) {
LOG ("unable to get root view for screenshot");
} else {
// This doesn't work:
/*
boolean was = view.isDrawingCacheEnabled();
if (!was) view.setDrawingCacheEnabled (true);
view.buildDrawingCache();
screenshot = view.getDrawingCache();
if (!was) view.setDrawingCacheEnabled (false);
if (screenshot == null) {
LOG ("unable to get screenshot bitmap from %s", view.toString());
} else {
screenshot = Bitmap.createBitmap (screenshot);
}
*/
// This doesn't work either: width and height are both -1...
int w = view.getLayoutParams().width;
int h = view.getLayoutParams().height;
if (w <= 0 || h <= 0) {
LOG ("unable to get root view for screenshot");
} else {
screenshot = Bitmap.createBitmap (w, h, Bitmap.Config.ARGB_8888);
Canvas c = new Canvas (screenshot);
view.layout (0, 0, w, h);
view.draw (c);
}
}
}
}
