package org.libsdl.app;

import android.app.*;

import android.content.*;

import android.view.*;

import android.view.inputmethod.BaseInputConnection;

import android.view.inputmethod.EditorInfo;

import android.view.inputmethod.InputConnection;

import android.view.inputmethod.InputMethodManager;

import android.widget.AbsoluteLayout;

import android.os.*;

import android.util.Log;

import android.graphics.*;

import android.media.*;

import android.hardware.*;

/**

SDL Activity

*/

public class SDLActivity extends Activity {

private static final String TAG = "SDL";

// Keep track of the paused state

public static boolean mIsPaused = false, mIsSurfaceReady = false, mHasFocus = true;

// Main components

protected static SDLActivity mSingleton;

protected static SDLSurface mSurface;

protected static View mTextEdit;

protected static ViewGroup mLayout;

// This is what SDL runs in. It invokes SDL_main(), eventually

protected static Thread mSDLThread;

// Audio

protected static Thread mAudioThread;

protected static AudioTrack mAudioTrack;

// Load the .so

static {

System.loadLibrary("SDL2");

//System.loadLibrary("SDL2_image");

//System.loadLibrary("SDL2_mixer");

//System.loadLibrary("SDL2_net");

//System.loadLibrary("SDL2_ttf");

System.loadLibrary("main");

}

// Setup

@Override

protected void onCreate(Bundle savedInstanceState) {

//Log.v("SDL", "onCreate()");

super.onCreate(savedInstanceState);

// So we can call stuff from static callbacks

mSingleton = this;

// Set up the surface

mSurface = new SDLSurface(getApplication());

mLayout = new AbsoluteLayout(this);

mLayout.addView(mSurface);

setContentView(mLayout);

}

// Events

@Override

protected void onPause() {

Log.v("SDL", "onPause()");

super.onPause();

SDLActivity.handlePause();

}

@Override

protected void onResume() {

Log.v("SDL", "onResume()");

super.onResume();

SDLActivity.handleResume();

}

@Override

public void onWindowFocusChanged(boolean hasFocus) {

super.onWindowFocusChanged(hasFocus);

Log.v("SDL", "onWindowFocusChanged(): " + hasFocus);

SDLActivity.mHasFocus = hasFocus;

if (hasFocus) {

SDLActivity.handleResume();

}

}

@Override

public void onLowMemory() {

Log.v("SDL", "onLowMemory()");

super.onLowMemory();

SDLActivity.nativeLowMemory();

}

@Override

protected void onDestroy() {

super.onDestroy();

Log.v("SDL", "onDestroy()");

// Send a quit message to the application

SDLActivity.nativeQuit();

// Now wait for the SDL thread to quit

if (mSDLThread != null) {

try {

mSDLThread.join();

} catch(Exception e) {

Log.v("SDL", "Problem stopping thread: " + e);

}

mSDLThread = null;

//Log.v("SDL", "Finished waiting for SDL thread");

}

}

@Override

public boolean dispatchKeyEvent(KeyEvent event) {

int keyCode = event.getKeyCode();

// Ignore volume keys so they're handled by Android

if (keyCode == KeyEvent.KEYCODE_VOLUME_DOWN ||

keyCode == KeyEvent.KEYCODE_VOLUME_UP) {

return false;

}

return super.dispatchKeyEvent(event);

}

/** Called by onPause or surfaceDestroyed. Even if surfaceDestroyed

* is the first to be called, mIsSurfaceReady should still be set

* to 'true' during the call to onPause (in a usual scenario).

*/

public static void handlePause() {

if (!SDLActivity.mIsPaused && SDLActivity.mIsSurfaceReady) {

SDLActivity.mIsPaused = true;

SDLActivity.nativePause();

mSurface.enableSensor(Sensor.TYPE_ACCELEROMETER, false);

}

}

/** Called by onResume or surfaceCreated. An actual resume should be done only when the surface is ready.

* Note: Some Android variants may send multiple surfaceChanged events, so we don't need to resume

* every time we get one of those events, only if it comes after surfaceDestroyed

*/

public static void handleResume() {

if (SDLActivity.mIsPaused && SDLActivity.mIsSurfaceReady && SDLActivity.mHasFocus) {

SDLActivity.mIsPaused = false;

SDLActivity.nativeResume();

mSurface.enableSensor(Sensor.TYPE_ACCELEROMETER, true);

}

}

// Messages from the SDLMain thread

static final int COMMAND_CHANGE_TITLE = 1;

static final int COMMAND_UNUSED = 2;

static final int COMMAND_TEXTEDIT_HIDE = 3;

protected static final int COMMAND_USER = 0x8000;

/**

* This method is called by SDL if SDL did not handle a message itself.

* This happens if a received message contains an unsupported command.

* Method can be overwritten to handle Messages in a different class.

* @param command the command of the message.

* @param param the parameter of the message. May be null.

* @return if the message was handled in overridden method.

*/

protected boolean onUnhandledMessage(int command, Object param) {

return false;

}

/**

* A Handler class for Messages from native SDL applications.

* It uses current Activities as target (e.g. for the title).

* static to prevent implicit references to enclosing object.

*/

protected static class SDLCommandHandler extends Handler {

@Override

public void handleMessage(Message msg) {

Context context = getContext();

if (context == null) {

Log.e(TAG, "error handling message, getContext() returned null");

return;

}

switch (msg.arg1) {

case COMMAND_CHANGE_TITLE:

if (context instanceof Activity) {

((Activity) context).setTitle((String)msg.obj);

} else {

Log.e(TAG, "error handling message, getContext() returned no Activity");

}

break;

case COMMAND_TEXTEDIT_HIDE:

if (mTextEdit != null) {

mTextEdit.setVisibility(View.GONE);

InputMethodManager imm = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);

imm.hideSoftInputFromWindow(mTextEdit.getWindowToken(), 0);

}

break;

default:

if ((context instanceof SDLActivity) && !((SDLActivity) context).onUnhandledMessage(msg.arg1, msg.obj)) {

Log.e(TAG, "error handling message, command is " + msg.arg1);

}

}

}

}

// Handler for the messages

Handler commandHandler = new SDLCommandHandler();

// Send a message from the SDLMain thread

boolean sendCommand(int command, Object data) {

Message msg = commandHandler.obtainMessage();

msg.arg1 = command;

msg.obj = data;

return commandHandler.sendMessage(msg);

}

// C functions we call

public static native void nativeInit();

public static native void nativeLowMemory();

public static native void nativeQuit();

public static native void nativePause();

public static native void nativeResume();

public static native void onNativeResize(int x, int y, int format);

public static native void onNativeKeyDown(int keycode);

public static native void onNativeKeyUp(int keycode);

public static native void onNativeKeyboardFocusLost();

public static native void onNativeTouch(int touchDevId, int pointerFingerId,

int action, float x,

float y, float p);

public static native void onNativeAccel(float x, float y, float z);

public static native void onNativeSurfaceChanged();

public static native void onNativeSurfaceDestroyed();

public static native void nativeFlipBuffers();

public static void flipBuffers() {

}

public static boolean setActivityTitle(String title) {

// Called from SDLMain() thread and can't directly affect the view

return mSingleton.sendCommand(COMMAND_CHANGE_TITLE, title);

}

public static boolean sendMessage(int command, int param) {

return mSingleton.sendCommand(command, Integer.valueOf(param));

}

public static Context getContext() {

return mSingleton;

}

static class ShowTextInputTask implements Runnable {

/*

* This is used to regulate the pan&scan method to have some offset from

* the bottom edge of the input region and the top edge of an input

* method (soft keyboard)

*/

static final int HEIGHT_PADDING = 15;

public int x, y, w, h;

public ShowTextInputTask(int x, int y, int w, int h) {

this.x = x;

this.y = y;

this.w = w;

this.h = h;

}

@Override

public void run() {

AbsoluteLayout.LayoutParams params = new AbsoluteLayout.LayoutParams(

w, h + HEIGHT_PADDING, x, y);

if (mTextEdit == null) {

mTextEdit = new DummyEdit(getContext());

mLayout.addView(mTextEdit, params);

} else {

mTextEdit.setLayoutParams(params);

}

mTextEdit.setVisibility(View.VISIBLE);

mTextEdit.requestFocus();

InputMethodManager imm = (InputMethodManager) getContext().getSystemService(Context.INPUT_METHOD_SERVICE);

imm.showSoftInput(mTextEdit, 0);

}

}

public static boolean showTextInput(int x, int y, int w, int h) {

// Transfer the task to the main thread as a Runnable

return mSingleton.commandHandler.post(new ShowTextInputTask(x, y, w, h));

}

public static Surface getNativeSurface() {

return SDLActivity.mSurface.getNativeSurface();

}

// Audio

public static int audioInit(int sampleRate, boolean is16Bit, boolean isStereo, int desiredFrames) {

int channelConfig = isStereo ? AudioFormat.CHANNEL_CONFIGURATION_STEREO : AudioFormat.CHANNEL_CONFIGURATION_MONO;

int audioFormat = is16Bit ? AudioFormat.ENCODING_PCM_16BIT : AudioFormat.ENCODING_PCM_8BIT;

int frameSize = (isStereo ? 2 : 1) * (is16Bit ? 2 : 1);

Log.v("SDL", "SDL audio: wanted " + (isStereo ? "stereo" : "mono") + " " + (is16Bit ? "16-bit" : "8-bit") + " " + (sampleRate / 1000f) + "kHz, " + desiredFrames + " frames buffer");

// Let the user pick a larger buffer if they really want -- but ye

// gods they probably shouldn't, the minimums are horrifyingly high

// latency already

desiredFrames = Math.max(desiredFrames, (AudioTrack.getMinBufferSize(sampleRate, channelConfig, audioFormat) + frameSize - 1) / frameSize);

if (mAudioTrack == null) {

mAudioTrack = new AudioTrack(AudioManager.STREAM_MUSIC, sampleRate,

channelConfig, audioFormat, desiredFrames * frameSize, AudioTrack.MODE_STREAM);

// Instantiating AudioTrack can "succeed" without an exception and the track may still be invalid

// Ref: https://android.googlesource.com/platform/frameworks/base/+/refs/heads/master/media/java/android/media/AudioTrack.java

// Ref: http://developer.android.com/reference/android/media/AudioTrack.html#getState()

if (mAudioTrack.getState() != AudioTrack.STATE_INITIALIZED) {

Log.e("SDL", "Failed during initialization of Audio Track");

mAudioTrack = null;

return -1;

}

mAudioTrack.play();

}

Log.v("SDL", "SDL audio: got " + ((mAudioTrack.getChannelCount() >= 2) ? "stereo" : "mono") + " " + ((mAudioTrack.getAudioFormat() == AudioFormat.ENCODING_PCM_16BIT) ? "16-bit" : "8-bit") + " " + (mAudioTrack.getSampleRate() / 1000f) + "kHz, " + desiredFrames + " frames buffer");

return 0;

}

public static void audioWriteShortBuffer(short[] buffer) {

for (int i = 0; i < buffer.length; ) {

int result = mAudioTrack.write(buffer, i, buffer.length - i);

if (result > 0) {

i += result;

} else if (result == 0) {

try {

Thread.sleep(1);

} catch(InterruptedException e) {

// Nom nom

}

} else {

Log.w("SDL", "SDL audio: error return from write(short)");

return;

}

}

}

public static void audioWriteByteBuffer(byte[] buffer) {

for (int i = 0; i < buffer.length; ) {

int result = mAudioTrack.write(buffer, i, buffer.length - i);

if (result > 0) {

i += result;

} else if (result == 0) {

try {

Thread.sleep(1);

} catch(InterruptedException e) {

// Nom nom

}

} else {

Log.w("SDL", "SDL audio: error return from write(byte)");

return;

}

}

}

public static void audioQuit() {

if (mAudioTrack != null) {

mAudioTrack.stop();

mAudioTrack = null;

}

}

}

/**

Simple nativeInit() runnable

*/

class SDLMain implements Runnable {

@Override

public void run() {

// Runs SDL_main()

SDLActivity.nativeInit();

//Log.v("SDL", "SDL thread terminated");

}

}

/**

SDLSurface. This is what we draw on, so we need to know when it's created

in order to do anything useful.

Because of this, that's where we set up the SDL thread

*/

class SDLSurface extends SurfaceView implements SurfaceHolder.Callback,

View.OnKeyListener, View.OnTouchListener, SensorEventListener {

// Sensors

protected static SensorManager mSensorManager;

// Keep track of the surface size to normalize touch events

protected static float mWidth, mHeight;

// Startup

public SDLSurface(Context context) {

super(context);

getHolder().addCallback(this);

setFocusable(true);

setFocusableInTouchMode(true);

requestFocus();

setOnKeyListener(this);

setOnTouchListener(this);

mSensorManager = (SensorManager)context.getSystemService(Context.SENSOR_SERVICE);

// Some arbitrary defaults to avoid a potential division by zero

mWidth = 1.0f;

mHeight = 1.0f;

}

public Surface getNativeSurface() {

return getHolder().getSurface();

}

// Called when we have a valid drawing surface

@Override

public void surfaceCreated(SurfaceHolder holder) {

Log.v("SDL", "surfaceCreated()");

holder.setType(SurfaceHolder.SURFACE_TYPE_GPU);

}

// Called when we lose the surface

@Override

public void surfaceDestroyed(SurfaceHolder holder) {

Log.v("SDL", "surfaceDestroyed()");

// Call this *before* setting mIsSurfaceReady to 'false'

SDLActivity.handlePause();

SDLActivity.mIsSurfaceReady = false;

}

// Called when the surface is resized

@Override

public void surfaceChanged(SurfaceHolder holder,

int format, int width, int height) {

Log.v("SDL", "surfaceChanged()");

int sdlFormat = 0x15151002; // SDL_PIXELFORMAT_RGB565 by default

switch (format) {

case PixelFormat.A_8:

Log.v("SDL", "pixel format A_8");

break;

case PixelFormat.LA_88:

Log.v("SDL", "pixel format LA_88");

break;

case PixelFormat.L_8:

Log.v("SDL", "pixel format L_8");

break;

case PixelFormat.RGBA_4444:

Log.v("SDL", "pixel format RGBA_4444");

sdlFormat = 0x15421002; // SDL_PIXELFORMAT_RGBA4444

break;

case PixelFormat.RGBA_5551:

Log.v("SDL", "pixel format RGBA_5551");

sdlFormat = 0x15441002; // SDL_PIXELFORMAT_RGBA5551

break;

case PixelFormat.RGBA_8888:

Log.v("SDL", "pixel format RGBA_8888");

sdlFormat = 0x16462004; // SDL_PIXELFORMAT_RGBA8888

break;

case PixelFormat.RGBX_8888:

Log.v("SDL", "pixel format RGBX_8888");

sdlFormat = 0x16261804; // SDL_PIXELFORMAT_RGBX8888

break;

case PixelFormat.RGB_332:

Log.v("SDL", "pixel format RGB_332");

sdlFormat = 0x14110801; // SDL_PIXELFORMAT_RGB332

break;

case PixelFormat.RGB_565:

Log.v("SDL", "pixel format RGB_565");

sdlFormat = 0x15151002; // SDL_PIXELFORMAT_RGB565

break;

case PixelFormat.RGB_888:

Log.v("SDL", "pixel format RGB_888");

// Not sure this is right, maybe SDL_PIXELFORMAT_RGB24 instead?

sdlFormat = 0x16161804; // SDL_PIXELFORMAT_RGB888

break;

default:

Log.v("SDL", "pixel format unknown " + format);

break;

}

mWidth = width;

mHeight = height;

SDLActivity.onNativeResize(width, height, sdlFormat);

Log.v("SDL", "Window size:" + width + "x"+height);

// Set mIsSurfaceReady to 'true' *before* making a call to handleResume

SDLActivity.mIsSurfaceReady = true;

SDLActivity.onNativeSurfaceChanged();

if (SDLActivity.mSDLThread == null) {

// This is the entry point to the C app.

// Start up the C app thread and enable sensor input for the first time

SDLActivity.mSDLThread = new Thread(new SDLMain(), "SDLThread");

enableSensor(Sensor.TYPE_ACCELEROMETER, true);

SDLActivity.mSDLThread.start();

}

}

// unused

@Override

public void onDraw(Canvas canvas) {}

// Key events

@Override

public boolean onKey(View v, int keyCode, KeyEvent event) {

if (event.getAction() == KeyEvent.ACTION_DOWN) {

//Log.v("SDL", "key down: " + keyCode);

SDLActivity.onNativeKeyDown(keyCode);

return true;

}

else if (event.getAction() == KeyEvent.ACTION_UP) {

//Log.v("SDL", "key up: " + keyCode);

SDLActivity.onNativeKeyUp(keyCode);

return true;

}

return false;

}

// Touch events

@Override

public boolean onTouch(View v, MotionEvent event) {

final int touchDevId = event.getDeviceId();

final int pointerCount = event.getPointerCount();

// touchId, pointerId, action, x, y, pressure

int actionPointerIndex = (event.getAction() & MotionEvent.ACTION_POINTER_ID_MASK) >> MotionEvent.ACTION_POINTER_ID_SHIFT; /* API 8: event.getActionIndex(); */

int pointerFingerId = event.getPointerId(actionPointerIndex);

int action = (event.getAction() & MotionEvent.ACTION_MASK); /* API 8: event.getActionMasked(); */

float x = event.getX(actionPointerIndex) / mWidth;

float y = event.getY(actionPointerIndex) / mHeight;

float p = event.getPressure(actionPointerIndex);

if (action == MotionEvent.ACTION_MOVE && pointerCount > 1) {

// TODO send motion to every pointer if its position has

// changed since prev event.

for (int i = 0; i < pointerCount; i++) {

pointerFingerId = event.getPointerId(i);

x = event.getX(i) / mWidth;

y = event.getY(i) / mHeight;

p = event.getPressure(i);

SDLActivity.onNativeTouch(touchDevId, pointerFingerId, action, x, y, p);

}

} else {

SDLActivity.onNativeTouch(touchDevId, pointerFingerId, action, x, y, p);

}

return true;

}

// Sensor events

public void enableSensor(int sensortype, boolean enabled) {

// TODO: This uses getDefaultSensor - what if we have >1 accels?

if (enabled) {

mSensorManager.registerListener(this,

mSensorManager.getDefaultSensor(sensortype),

SensorManager.SENSOR_DELAY_GAME, null);

} else {

mSensorManager.unregisterListener(this,

mSensorManager.getDefaultSensor(sensortype));

}

}

@Override

public void onAccuracyChanged(Sensor sensor, int accuracy) {

// TODO

}

@Override

public void onSensorChanged(SensorEvent event) {

if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {

SDLActivity.onNativeAccel(event.values[0] / SensorManager.GRAVITY_EARTH,

event.values[1] / SensorManager.GRAVITY_EARTH,

event.values[2] / SensorManager.GRAVITY_EARTH);

}

}

}

/* This is a fake invisible editor view that receives the input and defines the

* pan&scan region

*/

class DummyEdit extends View implements View.OnKeyListener {

InputConnection ic;

public DummyEdit(Context context) {

super(context);

setFocusableInTouchMode(true);

setFocusable(true);

setOnKeyListener(this);

}

@Override

public boolean onCheckIsTextEditor() {

return true;

}

@Override

public boolean onKey(View v, int keyCode, KeyEvent event) {

// This handles the hardware keyboard input

if (event.isPrintingKey()) {

if (event.getAction() == KeyEvent.ACTION_DOWN) {

ic.commitText(String.valueOf((char) event.getUnicodeChar()), 1);

}

return true;

}

if (event.getAction() == KeyEvent.ACTION_DOWN) {

SDLActivity.onNativeKeyDown(keyCode);

return true;

} else if (event.getAction() == KeyEvent.ACTION_UP) {

SDLActivity.onNativeKeyUp(keyCode);

return true;

}

return false;

}

//

@Override

public boolean onKeyPreIme (int keyCode, KeyEvent event) {

// As seen on StackOverflow: http://stackoverflow.com/questions/7634346/keyboard-hide-event

// FIXME: Discussion at http://bugzilla.libsdl.org/show_bug.cgi?id=1639

// FIXME: This is not a 100% effective solution to the problem of detecting if the keyboard is showing or not

// FIXME: A more effective solution would be to change our Layout from AbsoluteLayout to Relative or Linear

// FIXME: And determine the keyboard presence doing this: http://stackoverflow.com/questions/2150078/how-to-check-visibility-of-software-keyboard-in-android

// FIXME: An even more effective way would be if Android provided this out of the box, but where would the fun be in that :)

if (event.getAction()==KeyEvent.ACTION_UP && keyCode == KeyEvent.KEYCODE_BACK) {

if (SDLActivity.mTextEdit != null && SDLActivity.mTextEdit.getVisibility() == View.VISIBLE) {

SDLActivity.onNativeKeyboardFocusLost();

}

}

return super.onKeyPreIme(keyCode, event);

}

@Override

public InputConnection onCreateInputConnection(EditorInfo outAttrs) {

ic = new SDLInputConnection(this, true);

outAttrs.imeOptions = EditorInfo.IME_FLAG_NO_EXTRACT_UI

| 33554432 /* API 11: EditorInfo.IME_FLAG_NO_FULLSCREEN */;

return ic;

}

}

class SDLInputConnection extends BaseInputConnection {

public SDLInputConnection(View targetView, boolean fullEditor) {

super(targetView, fullEditor);

}

@Override

public boolean sendKeyEvent(KeyEvent event) {

/*

* This handles the keycodes from soft keyboard (and IME-translated

* input from hardkeyboard)

*/

int keyCode = event.getKeyCode();

if (event.getAction() == KeyEvent.ACTION_DOWN) {

if (event.isPrintingKey()) {

commitText(String.valueOf((char) event.getUnicodeChar()), 1);

}

SDLActivity.onNativeKeyDown(keyCode);

return true;

} else if (event.getAction() == KeyEvent.ACTION_UP) {

SDLActivity.onNativeKeyUp(keyCode);

return true;

}

return super.sendKeyEvent(event);

}

@Override

public boolean commitText(CharSequence text, int newCursorPosition) {

nativeCommitText(text.toString(), newCursorPosition);

return super.commitText(text, newCursorPosition);

}

@Override

public boolean setComposingText(CharSequence text, int newCursorPosition) {

nativeSetComposingText(text.toString(), newCursorPosition);

return super.setComposingText(text, newCursorPosition);

}

public native void nativeCommitText(String text, int newCursorPosition);

public native void nativeSetComposingText(String text, int newCursorPosition);

}