/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.s16.inputmethod.skeyboard;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.os.Handler;
import android.os.Message;
import android.os.SystemClock;
import android.util.AttributeSet;
import android.view.MotionEvent;
import com.s16.inputmethod.skeyboard.Keyboard;
import com.s16.inputmethod.skeyboard.Keyboard.Key;
import java.util.List;
public class SoftKeyboardView extends KeyboardBaseView {
/*static final int KEYCODE_OPTIONS = -100;
static final int KEYCODE_OPTIONS_LONGPRESS = -101;
static final int KEYCODE_VOICE = -102;
static final int KEYCODE_F1 = -103;
static final int KEYCODE_NEXT_LANGUAGE = -104;
static final int KEYCODE_PREV_LANGUAGE = -105;*/
/** Whether we've started dropping move events because we found a big jump */
private boolean mDroppingEvents;
/**
* Whether multi-touch disambiguation needs to be disabled if a real multi-touch event has
* occured
*/
private boolean mDisableDisambiguation;
/** The distance threshold at which we start treating the touch session as a multi-touch */
private int mJumpThresholdSquare = Integer.MAX_VALUE;
/** The y coordinate of the last row */
private int mLastRowY;
public SoftKeyboardView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public SoftKeyboardView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
@Override
public void setPreviewEnabled(boolean previewEnabled) {
final Keyboard keyboard = getKeyboard();
if(keyboard != null && keyboard.getDisablePreview()) {
super.setPreviewEnabled(false);
} else {
super.setPreviewEnabled(previewEnabled);
}
}
@Override
public void setKeyboard(Keyboard k) {
super.setKeyboard(k);
// One-seventh of the keyboard width seems like a reasonable threshold
mJumpThresholdSquare = k.getMinWidth() / 7;
mJumpThresholdSquare *= mJumpThresholdSquare;
// Assuming there are 4 rows, this is the coordinate of the last row
mLastRowY = (k.getHeight() * 3) / 4;
setKeyboardLocal(k);
}
private SoftKeyboard getSoftKeyboard() {
Keyboard keyboard = getKeyboard();
if(keyboard == null) return null;
if (keyboard instanceof SoftKeyboard) {
return (SoftKeyboard)keyboard;
}
return null;
}
protected boolean isPhoneKeyboard() {
boolean isPhoneKeyboard = false;
final SoftKeyboard keyboard = getSoftKeyboard();
if(keyboard != null) {
isPhoneKeyboard = (keyboard.getKeyboardMode() == KeyboardSwitcher.MODE_PHONE);
}
return isPhoneKeyboard;
}
// SMM {
@Override
protected void showKey(final int keyIndex, PointerTracker tracker) {
Key key = tracker.getKey(keyIndex);
if (key != null) {
final SoftKeyboard keyboard = getSoftKeyboard();
if(keyboard != null && tracker.isSpaceKey(keyIndex)
&& !keyboard.isLanguageSwitchSlideEnabled()) {
return;
}
}
super.showKey(keyIndex, tracker);
}
protected boolean openMethodPickerIfRequired() {
final SoftKeyboard keyboard = getSoftKeyboard();
if(keyboard != null) {
if (!keyboard.isLanguageSwitchSlideEnabled()
&& IMEUtil.hasMultipleEnabledIMEs(getContext())) {
return invokeOnKey(KeyCodes.KEYCODE_INPUT_METHOD);
}
}
return false;
}
// } SMM
@Override
protected boolean onLongPress(Key key) {
int primaryCode = key.codes[0]; // SMM
if (primaryCode == KeyCodes.KEYCODE_SPACE) { // SMM
return openMethodPickerIfRequired();
} else if (primaryCode == KeyCodes.KEYCODE_OPTIONS) {
return invokeOnKey(KeyCodes.KEYCODE_OPTIONS_LONGPRESS);
} else if (primaryCode == '0' && isPhoneKeyboard()) {
// Long pressing on 0 in phone number keypad gives you a '+'.
return invokeOnKey('+');
}
return super.onLongPress(key);
}
private boolean invokeOnKey(int primaryCode) {
getOnKeyboardActionListener().onKey(primaryCode, null,
KeyboardBaseView.NOT_A_TOUCH_COORDINATE,
KeyboardBaseView.NOT_A_TOUCH_COORDINATE);
return true;
}
@Override
protected boolean mayBeAdjustCase() {
final SoftKeyboard keyboard = getSoftKeyboard();
if(keyboard == null) return false;
return keyboard != null
&& keyboard.isShifted()
&& keyboard.isAlphaKeyboard();
}
public boolean setShiftLocked(boolean shiftLocked) {
final SoftKeyboard keyboard = getSoftKeyboard();
if (keyboard != null) {
keyboard.setShiftLocked(shiftLocked);
invalidateAllKeys();
return true;
}
return false;
}
/**
* This function checks to see if we need to handle any sudden jumps in the pointer location
* that could be due to a multi-touch being treated as a move by the firmware or hardware.
* Once a sudden jump is detected, all subsequent move events are discarded
* until an UP is received.<P>
* When a sudden jump is detected, an UP event is simulated at the last position and when
* the sudden moves subside, a DOWN event is simulated for the second key.
* @param me the motion event
* @return true if the event was consumed, so that it doesn't continue to be handled by
* KeyboardView.
*/
private boolean handleSuddenJump(MotionEvent me) {
final int action = me.getAction();
final int x = (int) me.getX();
final int y = (int) me.getY();
boolean result = false;
// Real multi-touch event? Stop looking for sudden jumps
if (me.getPointerCount() > 1) {
mDisableDisambiguation = true;
}
if (mDisableDisambiguation) {
// If UP, reset the multi-touch flag
if (action == MotionEvent.ACTION_UP) mDisableDisambiguation = false;
return false;
}
switch (action) {
case MotionEvent.ACTION_DOWN:
// Reset the "session"
mDroppingEvents = false;
mDisableDisambiguation = false;
break;
case MotionEvent.ACTION_MOVE:
// Is this a big jump?
final int distanceSquare = (mLastX - x) * (mLastX - x) + (mLastY - y) * (mLastY - y);
// Check the distance and also if the move is not entirely within the bottom row
// If it's only in the bottom row, it might be an intentional slide gesture
// for language switching
if (distanceSquare > mJumpThresholdSquare
&& (mLastY < mLastRowY || y < mLastRowY)) {
// If we're not yet dropping events, start dropping and send an UP event
if (!mDroppingEvents) {
mDroppingEvents = true;
// Send an up event
MotionEvent translated = MotionEvent.obtain(me.getEventTime(), me.getEventTime(),
MotionEvent.ACTION_UP,
mLastX, mLastY, me.getMetaState());
super.onTouchEvent(translated);
translated.recycle();
}
result = true;
} else if (mDroppingEvents) {
// If moves are small and we're already dropping events, continue dropping
result = true;
}
break;
case MotionEvent.ACTION_UP:
if (mDroppingEvents) {
// Send a down event first, as we dropped a bunch of sudden jumps and assume that
// the user is releasing the touch on the second key.
MotionEvent translated = MotionEvent.obtain(me.getEventTime(), me.getEventTime(),
MotionEvent.ACTION_DOWN,
x, y, me.getMetaState());
super.onTouchEvent(translated);
translated.recycle();
mDroppingEvents = false;
// Let the up event get processed as well, result = false
}
break;
}
// Track the previous coordinate
mLastX = x;
mLastY = y;
return result;
}
@Override
public boolean onTouchEvent(MotionEvent me) {
if (DEBUG_LINE) {
mLastX = (int) me.getX();
mLastY = (int) me.getY();
invalidate();
}
// If there was a sudden jump, return without processing the actual motion event.
if (handleSuddenJump(me))
return true;
final SoftKeyboard keyboard = getSoftKeyboard();
if (keyboard != null) {
// Reset any bounding box controls in the keyboard
if (me.getAction() == MotionEvent.ACTION_DOWN) {
keyboard.keyReleased();
}
if (me.getAction() == MotionEvent.ACTION_UP) {
if (keyboard.isLanguageSwitchSlideEnabled()) { // SMM
int languageDirection = keyboard.getLanguageChangeDirection();
if (languageDirection != 0) {
getOnKeyboardActionListener().onKey(
languageDirection == 1 ? KeyCodes.KEYCODE_NEXT_LANGUAGE : KeyCodes.KEYCODE_PREV_LANGUAGE,
null, mLastX, mLastY);
me.setAction(MotionEvent.ACTION_CANCEL);
keyboard.keyReleased();
return super.onTouchEvent(me);
}
}
}
}
return super.onTouchEvent(me);
}
/**************************** INSTRUMENTATION *******************************/
static final boolean DEBUG_AUTO_PLAY = false;
static final boolean DEBUG_LINE = false;
private static final int MSG_TOUCH_DOWN = 1;
private static final int MSG_TOUCH_UP = 2;
Handler mHandler2;
private String mStringToPlay;
private int mStringIndex;
private boolean mDownDelivered;
private Key[] mAsciiKeys = new Key[256];
private boolean mPlaying;
private int mLastX;
private int mLastY;
private Paint mPaint;
private void setKeyboardLocal(Keyboard k) {
if (DEBUG_AUTO_PLAY) {
findKeys();
if (mHandler2 == null) {
mHandler2 = new Handler() {
@Override
public void handleMessage(Message msg) {
removeMessages(MSG_TOUCH_DOWN);
removeMessages(MSG_TOUCH_UP);
if (mPlaying == false) return;
switch (msg.what) {
case MSG_TOUCH_DOWN:
if (mStringIndex >= mStringToPlay.length()) {
mPlaying = false;
return;
}
char c = mStringToPlay.charAt(mStringIndex);
while (c > 255 || mAsciiKeys[c] == null) {
mStringIndex++;
if (mStringIndex >= mStringToPlay.length()) {
mPlaying = false;
return;
}
c = mStringToPlay.charAt(mStringIndex);
}
int x = mAsciiKeys[c].x + 10;
int y = mAsciiKeys[c].y + 26;
MotionEvent me = MotionEvent.obtain(SystemClock.uptimeMillis(),
SystemClock.uptimeMillis(),
MotionEvent.ACTION_DOWN, x, y, 0);
SoftKeyboardView.this.dispatchTouchEvent(me);
me.recycle();
sendEmptyMessageDelayed(MSG_TOUCH_UP, 500); // Deliver up in 500ms if nothing else
// happens
mDownDelivered = true;
break;
case MSG_TOUCH_UP:
char cUp = mStringToPlay.charAt(mStringIndex);
int x2 = mAsciiKeys[cUp].x + 10;
int y2 = mAsciiKeys[cUp].y + 26;
mStringIndex++;
MotionEvent me2 = MotionEvent.obtain(SystemClock.uptimeMillis(),
SystemClock.uptimeMillis(),
MotionEvent.ACTION_UP, x2, y2, 0);
SoftKeyboardView.this.dispatchTouchEvent(me2);
me2.recycle();
sendEmptyMessageDelayed(MSG_TOUCH_DOWN, 500); // Deliver up in 500ms if nothing else
// happens
mDownDelivered = false;
break;
}
}
};
}
}
}
private void findKeys() {
List<Key> keys = getKeyboard().getKeys();
// Get the keys on this keyboard
for (int i = 0; i < keys.size(); i++) {
int code = keys.get(i).getCode(); // SMM
if (code >= 0 && code <= 255) {
mAsciiKeys[code] = keys.get(i);
}
}
}
public void startPlaying(String s) {
if (DEBUG_AUTO_PLAY) {
if (s == null) return;
mStringToPlay = s.toLowerCase();
mPlaying = true;
mDownDelivered = false;
mStringIndex = 0;
mHandler2.sendEmptyMessageDelayed(MSG_TOUCH_DOWN, 10);
}
}
@Override
public void draw(Canvas c) {
IMEUtil.GCUtils.getInstance().reset();
boolean tryGC = true;
for (int i = 0; i < IMEUtil.GCUtils.GC_TRY_LOOP_MAX && tryGC; ++i) {
try {
super.draw(c);
tryGC = false;
} catch (OutOfMemoryError e) {
tryGC = IMEUtil.GCUtils.getInstance().tryGCOrWait("LatinKeyboardView", e);
}
}
if (DEBUG_AUTO_PLAY) {
if (mPlaying) {
mHandler2.removeMessages(MSG_TOUCH_DOWN);
mHandler2.removeMessages(MSG_TOUCH_UP);
if (mDownDelivered) {
mHandler2.sendEmptyMessageDelayed(MSG_TOUCH_UP, 20);
} else {
mHandler2.sendEmptyMessageDelayed(MSG_TOUCH_DOWN, 20);
}
}
}
if (DEBUG_LINE) {
if (mPaint == null) {
mPaint = new Paint();
mPaint.setColor(0x80FFFFFF);
mPaint.setAntiAlias(false);
}
c.drawLine(mLastX, 0, mLastX, getHeight(), mPaint);
c.drawLine(0, mLastY, getWidth(), mLastY, mPaint);
}
}
}