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/*
* Copyright (c) 2011, 2016, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package sun.lwawt.macosx;
import sun.awt.SunToolkit;
import sun.lwawt.LWWindowPeer;
import sun.lwawt.PlatformEventNotifier;
import java.awt.Toolkit;
import java.awt.event.MouseEvent;
import java.awt.event.InputEvent;
import java.awt.event.MouseWheelEvent;
import java.awt.event.KeyEvent;
import java.util.Locale;
/**
* Translates NSEvents/NPCocoaEvents into AWT events.
*/
final class CPlatformResponder {
private final PlatformEventNotifier eventNotifier;
private final boolean isNpapiCallback;
private int lastKeyPressCode = KeyEvent.VK_UNDEFINED;
private final DeltaAccumulator deltaAccumulatorX = new DeltaAccumulator();
private final DeltaAccumulator deltaAccumulatorY = new DeltaAccumulator();
CPlatformResponder(final PlatformEventNotifier eventNotifier,
final boolean isNpapiCallback) {
this.eventNotifier = eventNotifier;
this.isNpapiCallback = isNpapiCallback;
}
/**
* Handles mouse events.
*/
void handleMouseEvent(int eventType, int modifierFlags, int buttonNumber,
int clickCount, int x, int y, int absX, int absY) {
final SunToolkit tk = (SunToolkit)Toolkit.getDefaultToolkit();
if ((buttonNumber > 2 && !tk.areExtraMouseButtonsEnabled())
|| buttonNumber > tk.getNumberOfButtons() - 1) {
return;
}
int jeventType = isNpapiCallback ? NSEvent.npToJavaEventType(eventType) :
NSEvent.nsToJavaEventType(eventType);
int jbuttonNumber = MouseEvent.NOBUTTON;
int jclickCount = 0;
if (jeventType != MouseEvent.MOUSE_MOVED &&
jeventType != MouseEvent.MOUSE_ENTERED &&
jeventType != MouseEvent.MOUSE_EXITED)
{
jbuttonNumber = NSEvent.nsToJavaButton(buttonNumber);
jclickCount = clickCount;
}
int jmodifiers = NSEvent.nsToJavaModifiers(modifierFlags);
boolean jpopupTrigger = NSEvent.isPopupTrigger(jmodifiers);
eventNotifier.notifyMouseEvent(jeventType, System.currentTimeMillis(), jbuttonNumber,
x, y, absX, absY, jmodifiers, jclickCount,
jpopupTrigger, null);
}
/**
* Handles scroll events.
*/
void handleScrollEvent(final int x, final int y, final int absX,
final int absY, final int modifierFlags,
final double deltaX, final double deltaY,
final int scrollPhase) {
int jmodifiers = NSEvent.nsToJavaModifiers(modifierFlags);
final boolean isShift = (jmodifiers & InputEvent.SHIFT_DOWN_MASK) != 0;
int roundDeltaX = deltaAccumulatorX.getRoundedDelta(deltaX, scrollPhase);
int roundDeltaY = deltaAccumulatorY.getRoundedDelta(deltaY, scrollPhase);
// Vertical scroll.
if (!isShift && (deltaY != 0.0 || roundDeltaY != 0)) {
dispatchScrollEvent(x, y, absX, absY, jmodifiers, roundDeltaY, deltaY);
}
// Horizontal scroll or shirt+vertical scroll.
final double delta = isShift && deltaY != 0.0 ? deltaY : deltaX;
final int roundDelta = isShift && roundDeltaY != 0 ? roundDeltaY : roundDeltaX;
if (delta != 0.0 || roundDelta != 0) {
jmodifiers |= InputEvent.SHIFT_DOWN_MASK;
dispatchScrollEvent(x, y, absX, absY, jmodifiers, roundDelta, delta);
}
}
private void dispatchScrollEvent(final int x, final int y, final int absX,
final int absY, final int modifiers,
final int roundDelta, final double delta) {
final long when = System.currentTimeMillis();
final int scrollType = MouseWheelEvent.WHEEL_UNIT_SCROLL;
final int scrollAmount = 1;
// invert the wheelRotation for the peer
eventNotifier.notifyMouseWheelEvent(when, x, y, absX, absY, modifiers,
scrollType, scrollAmount,
-roundDelta, -delta, null);
}
/**
* Handles key events.
*/
void handleKeyEvent(int eventType, int modifierFlags, String chars, String charsIgnoringModifiers,
short keyCode, boolean needsKeyTyped, boolean needsKeyReleased) {
boolean isFlagsChangedEvent =
isNpapiCallback ? (eventType == CocoaConstants.NPCocoaEventFlagsChanged) :
(eventType == CocoaConstants.NSFlagsChanged);
int jeventType = KeyEvent.KEY_PRESSED;
int jkeyCode = KeyEvent.VK_UNDEFINED;
int jkeyLocation = KeyEvent.KEY_LOCATION_UNKNOWN;
boolean postsTyped = false;
boolean spaceKeyTyped = false;
char testChar = KeyEvent.CHAR_UNDEFINED;
boolean isDeadChar = (chars!= null && chars.length() == 0);
if (isFlagsChangedEvent) {
int[] in = new int[] {modifierFlags, keyCode};
int[] out = new int[3]; // [jkeyCode, jkeyLocation, jkeyType]
NSEvent.nsKeyModifiersToJavaKeyInfo(in, out);
jkeyCode = out[0];
jkeyLocation = out[1];
jeventType = out[2];
} else {
if (chars != null && chars.length() > 0) {
testChar = chars.charAt(0);
//Check if String chars contains SPACE character.
if (chars.trim().isEmpty()) {
spaceKeyTyped = true;
}
}
char testCharIgnoringModifiers = charsIgnoringModifiers != null && charsIgnoringModifiers.length() > 0 ?
charsIgnoringModifiers.charAt(0) : KeyEvent.CHAR_UNDEFINED;
int[] in = new int[] {testCharIgnoringModifiers, isDeadChar ? 1 : 0, modifierFlags, keyCode};
int[] out = new int[3]; // [jkeyCode, jkeyLocation, deadChar]
postsTyped = NSEvent.nsToJavaKeyInfo(in, out);
if (!postsTyped) {
testChar = KeyEvent.CHAR_UNDEFINED;
}
if(isDeadChar){
testChar = (char) out[2];
if(testChar == 0){
return;
}
}
// If Pinyin Simplified input method is selected, CAPS_LOCK key is supposed to switch
// input to latin letters.
// It is necessary to use testCharIgnoringModifiers instead of testChar for event
// generation in such case to avoid uppercase letters in text components.
LWCToolkit lwcToolkit = (LWCToolkit)Toolkit.getDefaultToolkit();
if (lwcToolkit.getLockingKeyState(KeyEvent.VK_CAPS_LOCK) &&
Locale.SIMPLIFIED_CHINESE.equals(lwcToolkit.getDefaultKeyboardLocale())) {
testChar = testCharIgnoringModifiers;
}
jkeyCode = out[0];
jkeyLocation = out[1];
jeventType = isNpapiCallback ? NSEvent.npToJavaEventType(eventType) :
NSEvent.nsToJavaEventType(eventType);
}
char javaChar = NSEvent.nsToJavaChar(testChar, modifierFlags, spaceKeyTyped);
// Some keys may generate a KEY_TYPED, but we can't determine
// what that character is. That's likely a bug, but for now we
// just check for CHAR_UNDEFINED.
if (javaChar == KeyEvent.CHAR_UNDEFINED) {
postsTyped = false;
}
int jmodifiers = NSEvent.nsToJavaModifiers(modifierFlags);
long when = System.currentTimeMillis();
if (jeventType == KeyEvent.KEY_PRESSED) {
lastKeyPressCode = jkeyCode;
}
eventNotifier.notifyKeyEvent(jeventType, when, jmodifiers,
jkeyCode, javaChar, jkeyLocation);
// Current browser may be sending input events, so don't
// post the KEY_TYPED here.
postsTyped &= needsKeyTyped;
// That's the reaction on the PRESSED (not RELEASED) event as it comes to
// appear in MacOSX.
// Modifier keys (shift, etc) don't want to send TYPED events.
// On the other hand we don't want to generate keyTyped events
// for clipboard related shortcuts like Meta + [CVX]
if (jeventType == KeyEvent.KEY_PRESSED && postsTyped &&
(jmodifiers & KeyEvent.META_DOWN_MASK) == 0) {
// Enter and Space keys finish the input method processing,
// KEY_TYPED and KEY_RELEASED events for them are synthesized in handleInputEvent.
if (needsKeyReleased && (jkeyCode == KeyEvent.VK_ENTER || jkeyCode == KeyEvent.VK_SPACE)) {
return;
}
eventNotifier.notifyKeyEvent(KeyEvent.KEY_TYPED, when, jmodifiers,
KeyEvent.VK_UNDEFINED, javaChar,
KeyEvent.KEY_LOCATION_UNKNOWN);
//If events come from Firefox, released events should also be generated.
if (needsKeyReleased) {
eventNotifier.notifyKeyEvent(KeyEvent.KEY_RELEASED, when, jmodifiers,
jkeyCode, javaChar,
KeyEvent.KEY_LOCATION_UNKNOWN);
}
}
}
void handleInputEvent(String text) {
if (text != null) {
int index = 0, length = text.length();
char c = 0;
while (index < length) {
c = text.charAt(index);
eventNotifier.notifyKeyEvent(KeyEvent.KEY_TYPED,
System.currentTimeMillis(),
0, KeyEvent.VK_UNDEFINED, c,
KeyEvent.KEY_LOCATION_UNKNOWN);
index++;
}
eventNotifier.notifyKeyEvent(KeyEvent.KEY_RELEASED,
System.currentTimeMillis(),
0, lastKeyPressCode, c,
KeyEvent.KEY_LOCATION_UNKNOWN);
}
}
void handleWindowFocusEvent(boolean gained, LWWindowPeer opposite) {
eventNotifier.notifyActivation(gained, opposite);
}
static class DeltaAccumulator {
static final double MIN_THRESHOLD = 0.1;
static final double MAX_THRESHOLD = 0.5;
double accumulatedDelta;
int getRoundedDelta(double delta, int scrollPhase) {
int roundDelta = (int) Math.round(delta);
if (scrollPhase == NSEvent.SCROLL_PHASE_UNSUPPORTED) { // mouse wheel
if (roundDelta == 0 && delta != 0) {
roundDelta = delta > 0 ? 1 : -1;
}
} else { // trackpad
boolean begin = scrollPhase == NSEvent.SCROLL_PHASE_BEGAN;
boolean end = scrollPhase == NSEvent.SCROLL_MASK_PHASE_ENDED
|| scrollPhase == NSEvent.SCROLL_MASK_PHASE_CANCELLED;
if (begin) {
accumulatedDelta = 0;
}
accumulatedDelta += delta;
double absAccumulatedDelta = Math.abs(accumulatedDelta);
if (absAccumulatedDelta > MAX_THRESHOLD) {
roundDelta = (int) Math.round(accumulatedDelta);
accumulatedDelta -= roundDelta;
}
if (end) {
if (roundDelta == 0 && absAccumulatedDelta > MIN_THRESHOLD) {
roundDelta = accumulatedDelta > 0 ? 1 : -1;
}
}
}
return roundDelta;
}
}
}