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/*
* Copyright (C) 2007 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.android.server;
import android.util.Log;
import android.view.Display;
import android.view.MotionEvent;
import android.view.Surface;
import android.view.WindowManagerPolicy;
public class InputDevice {
/** Amount that trackball needs to move in order to generate a key event. */
static final int TRACKBALL_MOVEMENT_THRESHOLD = 6;
final int id;
final int classes;
final String name;
final AbsoluteInfo absX;
final AbsoluteInfo absY;
final AbsoluteInfo absPressure;
final AbsoluteInfo absSize;
long mDownTime = 0;
int mMetaKeysState = 0;
final MotionState mAbs = new MotionState(0, 0);
final MotionState mRel = new MotionState(TRACKBALL_MOVEMENT_THRESHOLD,
TRACKBALL_MOVEMENT_THRESHOLD);
static class MotionState {
int xPrecision;
int yPrecision;
float xMoveScale;
float yMoveScale;
MotionEvent currentMove = null;
boolean changed = false;
boolean down = false;
boolean lastDown = false;
long downTime = 0;
int x = 0;
int y = 0;
int pressure = 1;
int size = 0;
MotionState(int mx, int my) {
xPrecision = mx;
yPrecision = my;
xMoveScale = mx != 0 ? (1.0f/mx) : 1.0f;
yMoveScale = my != 0 ? (1.0f/my) : 1.0f;
}
MotionEvent generateMotion(InputDevice device, long curTime, long curTimeNano,
boolean isAbs, Display display, int orientation,
int metaState) {
if (!changed) {
return null;
}
float scaledX = x;
float scaledY = y;
float temp;
float scaledPressure = 1.0f;
float scaledSize = 0;
int edgeFlags = 0;
if (isAbs) {
int w = display.getWidth()-1;
int h = display.getHeight()-1;
if (orientation == Surface.ROTATION_90
|| orientation == Surface.ROTATION_270) {
int tmp = w;
w = h;
h = tmp;
}
if (device.absX != null) {
scaledX = ((scaledX-device.absX.minValue)
/ device.absX.range) * w;
}
if (device.absY != null) {
scaledY = ((scaledY-device.absY.minValue)
/ device.absY.range) * h;
}
if (device.absPressure != null) {
scaledPressure =
((pressure-device.absPressure.minValue)
/ (float)device.absPressure.range);
}
if (device.absSize != null) {
scaledSize =
((size-device.absSize.minValue)
/ (float)device.absSize.range);
}
switch (orientation) {
case Surface.ROTATION_90:
temp = scaledX;
scaledX = scaledY;
scaledY = w-temp;
break;
case Surface.ROTATION_180:
scaledX = w-scaledX;
scaledY = h-scaledY;
break;
case Surface.ROTATION_270:
temp = scaledX;
scaledX = h-scaledY;
scaledY = temp;
break;
}
if (scaledX == 0) {
edgeFlags += MotionEvent.EDGE_LEFT;
} else if (scaledX == display.getWidth() - 1.0f) {
edgeFlags += MotionEvent.EDGE_RIGHT;
}
if (scaledY == 0) {
edgeFlags += MotionEvent.EDGE_TOP;
} else if (scaledY == display.getHeight() - 1.0f) {
edgeFlags += MotionEvent.EDGE_BOTTOM;
}
} else {
scaledX *= xMoveScale;
scaledY *= yMoveScale;
switch (orientation) {
case Surface.ROTATION_90:
temp = scaledX;
scaledX = scaledY;
scaledY = -temp;
break;
case Surface.ROTATION_180:
scaledX = -scaledX;
scaledY = -scaledY;
break;
case Surface.ROTATION_270:
temp = scaledX;
scaledX = -scaledY;
scaledY = temp;
break;
}
}
changed = false;
if (down != lastDown) {
int action;
lastDown = down;
if (down) {
action = MotionEvent.ACTION_DOWN;
downTime = curTime;
} else {
action = MotionEvent.ACTION_UP;
}
currentMove = null;
if (!isAbs) {
x = y = 0;
}
return MotionEvent.obtainNano(downTime, curTime, curTimeNano, action,
scaledX, scaledY, scaledPressure, scaledSize, metaState,
xPrecision, yPrecision, device.id, edgeFlags);
} else {
if (currentMove != null) {
if (false) Log.i("InputDevice", "Adding batch x=" + scaledX
+ " y=" + scaledY + " to " + currentMove);
currentMove.addBatch(curTime, scaledX, scaledY,
scaledPressure, scaledSize, metaState);
if (WindowManagerPolicy.WATCH_POINTER) {
Log.i("KeyInputQueue", "Updating: " + currentMove);
}
return null;
}
MotionEvent me = MotionEvent.obtainNano(downTime, curTime, curTimeNano,
MotionEvent.ACTION_MOVE, scaledX, scaledY,
scaledPressure, scaledSize, metaState,
xPrecision, yPrecision, device.id, edgeFlags);
currentMove = me;
return me;
}
}
}
static class AbsoluteInfo {
int minValue;
int maxValue;
int range;
int flat;
int fuzz;
};
InputDevice(int _id, int _classes, String _name,
AbsoluteInfo _absX, AbsoluteInfo _absY,
AbsoluteInfo _absPressure, AbsoluteInfo _absSize) {
id = _id;
classes = _classes;
name = _name;
absX = _absX;
absY = _absY;
absPressure = _absPressure;
absSize = _absSize;
}
};
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