342 lines
12 KiB
Java
342 lines
12 KiB
Java
/*
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* Copyright (c) 2002-2008 LWJGL Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name of 'LWJGL' nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package org.lwjgl.opengl;
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/**
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* @author elias_naur
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*/
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import java.nio.ByteBuffer;
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import java.nio.CharBuffer;
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import java.nio.charset.Charset;
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import java.nio.charset.CharsetDecoder;
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import org.lwjgl.BufferUtils;
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import org.lwjgl.LWJGLUtil;
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import org.lwjgl.input.Keyboard;
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final class LinuxKeyboard {
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private static final int LockMapIndex = 1;
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private static final long NoSymbol = 0;
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private static final long ShiftMask = 1 << 0;
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private static final long LockMask = 1 << 1;
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private static final int XLookupChars = 2;
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private static final int XLookupBoth = 4;
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private static final int KEYBOARD_BUFFER_SIZE = 50;
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private final long xim;
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private final long xic;
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private final int numlock_mask;
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private final int modeswitch_mask;
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private final int caps_lock_mask;
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private final int shift_lock_mask;
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private final ByteBuffer compose_status;
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private final byte[] key_down_buffer = new byte[Keyboard.KEYBOARD_SIZE];
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private final EventQueue event_queue = new EventQueue(Keyboard.EVENT_SIZE);
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private final ByteBuffer tmp_event = ByteBuffer.allocate(Keyboard.EVENT_SIZE);
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private final int[] temp_translation_buffer = new int[KEYBOARD_BUFFER_SIZE];
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private final ByteBuffer native_translation_buffer = BufferUtils.createByteBuffer(KEYBOARD_BUFFER_SIZE);
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private final CharsetDecoder utf8_decoder = Charset.forName("UTF-8").newDecoder();
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private final CharBuffer char_buffer = CharBuffer.allocate(KEYBOARD_BUFFER_SIZE);
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// Deferred key released event, to detect key repeat
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private boolean has_deferred_event;
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private int deferred_keycode;
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private int deferred_event_keycode;
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private long deferred_nanos;
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private byte deferred_key_state;
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LinuxKeyboard(long display, long window) {
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long modifier_map = getModifierMapping(display);
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int tmp_numlock_mask = 0;
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int tmp_modeswitch_mask = 0;
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int tmp_caps_lock_mask = 0;
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int tmp_shift_lock_mask = 0;
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if (modifier_map != 0) {
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int max_keypermod = getMaxKeyPerMod(modifier_map);
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// Find modifier masks
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int i, j;
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for (i = 0; i < 8; i++) {
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for (j = 0; j < max_keypermod; j++) {
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int key_code = lookupModifierMap(modifier_map, i*max_keypermod + j);
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int key_sym = (int)keycodeToKeySym(display, key_code);
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int mask = 1 << i;
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switch (key_sym) {
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case LinuxKeycodes.XK_Num_Lock:
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tmp_numlock_mask |= mask;
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break;
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case LinuxKeycodes.XK_Mode_switch:
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tmp_modeswitch_mask |= mask;
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break;
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case LinuxKeycodes.XK_Caps_Lock:
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if (i == LockMapIndex) {
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tmp_caps_lock_mask = mask;
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tmp_shift_lock_mask = 0;
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}
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break;
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case LinuxKeycodes.XK_Shift_Lock:
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if (i == LockMapIndex && tmp_caps_lock_mask == 0)
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tmp_shift_lock_mask = mask;
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break;
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default:
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break;
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}
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}
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}
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freeModifierMapping(modifier_map);
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}
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numlock_mask = tmp_numlock_mask;
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modeswitch_mask = tmp_modeswitch_mask;
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caps_lock_mask = tmp_caps_lock_mask;
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shift_lock_mask = tmp_shift_lock_mask;
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setDetectableKeyRepeat(display, true);
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xim = openIM(display);
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if (xim != 0) {
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xic = createIC(xim, window);
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if (xic != 0) {
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setupIMEventMask(display, window, xic);
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} else {
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destroy(display);
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}
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} else {
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xic = 0;
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}
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compose_status = allocateComposeStatus();
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}
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private static native long getModifierMapping(long display);
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private static native void freeModifierMapping(long modifier_map);
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private static native int getMaxKeyPerMod(long modifier_map);
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private static native int lookupModifierMap(long modifier_map, int index);
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private static native long keycodeToKeySym(long display, int key_code);
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private static native long openIM(long display);
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private static native long createIC(long xim, long window);
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private static native void setupIMEventMask(long display, long window, long xic);
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private static native ByteBuffer allocateComposeStatus();
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private static void setDetectableKeyRepeat(long display, boolean enabled) {
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boolean success = nSetDetectableKeyRepeat(display, enabled);
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if (!success)
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LWJGLUtil.log("Failed to set detectable key repeat to " + enabled);
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}
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private static native boolean nSetDetectableKeyRepeat(long display, boolean enabled);
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public void destroy(long display) {
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if (xic != 0)
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destroyIC(xic);
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if (xim != 0)
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closeIM(xim);
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setDetectableKeyRepeat(display, false);
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}
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private static native void destroyIC(long xic);
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private static native void closeIM(long xim);
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public void read(ByteBuffer buffer) {
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flushDeferredEvent();
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event_queue.copyEvents(buffer);
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}
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public void poll(ByteBuffer keyDownBuffer) {
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flushDeferredEvent();
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int old_position = keyDownBuffer.position();
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keyDownBuffer.put(key_down_buffer);
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keyDownBuffer.position(old_position);
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}
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private void putKeyboardEvent(int keycode, byte state, int ch, long nanos, boolean repeat) {
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tmp_event.clear();
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tmp_event.putInt(keycode).put(state).putInt(ch).putLong(nanos).put(repeat ? (byte)1 : (byte)0);
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tmp_event.flip();
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event_queue.putEvent(tmp_event);
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}
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private int lookupStringISO88591(long event_ptr, int[] translation_buffer) {
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int i;
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int num_chars = lookupString(event_ptr, native_translation_buffer, compose_status);
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for (i = 0; i < num_chars; i++) {
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translation_buffer[i] = ((int)native_translation_buffer.get(i)) & 0xff;
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}
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return num_chars;
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}
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private static native int lookupString(long event_ptr, ByteBuffer buffer, ByteBuffer compose_status);
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private int lookupStringUnicode(long event_ptr, int[] translation_buffer) {
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int status = utf8LookupString(xic, event_ptr, native_translation_buffer, native_translation_buffer.position(), native_translation_buffer.remaining());
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if (status != XLookupChars && status != XLookupBoth)
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return 0;
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native_translation_buffer.flip();
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utf8_decoder.decode(native_translation_buffer, char_buffer, true);
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native_translation_buffer.compact();
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char_buffer.flip();
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int i = 0;
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while (char_buffer.hasRemaining() && i < translation_buffer.length) {
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translation_buffer[i++] = char_buffer.get();
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}
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char_buffer.compact();
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return i;
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}
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private static native int utf8LookupString(long xic, long event_ptr, ByteBuffer buffer, int pos, int size);
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private int lookupString(long event_ptr, int[] translation_buffer) {
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if (xic != 0) {
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return lookupStringUnicode(event_ptr, translation_buffer);
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} else
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return lookupStringISO88591(event_ptr, translation_buffer);
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}
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private void translateEvent(long event_ptr, int keycode, byte key_state, long nanos, boolean repeat) {
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int num_chars, i;
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int ch;
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num_chars = lookupString(event_ptr, temp_translation_buffer);
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if (num_chars > 0) {
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ch = temp_translation_buffer[0];
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putKeyboardEvent(keycode, key_state, ch, nanos, repeat);
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for (i = 1; i < num_chars; i++) {
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ch = temp_translation_buffer[i];
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putKeyboardEvent(0, (byte)0, ch, nanos, repeat);
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}
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} else {
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putKeyboardEvent(keycode, key_state, 0, nanos, repeat);
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}
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}
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private static boolean isKeypadKeysym(long keysym) {
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return (0xFF80 <= keysym && keysym <= 0xFFBD) ||
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(0x11000000 <= keysym && keysym <= 0x1100FFFF);
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}
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private static boolean isNoSymbolOrVendorSpecific(long keysym) {
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return keysym == NoSymbol || (keysym & (1 << 28)) != 0;
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}
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private static long getKeySym(long event_ptr, int group, int index) {
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long keysym = lookupKeysym(event_ptr, group*2 + index);
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if (isNoSymbolOrVendorSpecific(keysym) && index == 1) {
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keysym = lookupKeysym(event_ptr, group*2 + 0);
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}
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if (isNoSymbolOrVendorSpecific(keysym) && group == 1)
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keysym = getKeySym(event_ptr, 0, index);
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return keysym;
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}
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private static native long lookupKeysym(long event_ptr, int index);
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private static native long toUpper(long keysym);
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private int getKeycode(long event_ptr, int event_state) {
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boolean shift = (event_state & (ShiftMask | shift_lock_mask)) != 0;
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int group = (event_state & modeswitch_mask) != 0 ? 1 : 0;
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long keysym;
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if ((event_state & numlock_mask) != 0 && isKeypadKeysym(keysym = getKeySym(event_ptr, group, 1))) {
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if ( shift )
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keysym = getKeySym(event_ptr, group, 0);
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} else {
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keysym = getKeySym(event_ptr, group, 0);
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if ( shift ^ ((event_state & caps_lock_mask) != 0) )
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keysym = toUpper(keysym);
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}
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return LinuxKeycodes.mapKeySymToLWJGLKeyCode(keysym);
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}
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private static byte getKeyState(int event_type) {
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switch (event_type) {
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case LinuxEvent.KeyPress:
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return 1;
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case LinuxEvent.KeyRelease:
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return 0;
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default:
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throw new IllegalArgumentException("Unknown event_type: " + event_type);
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}
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}
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/** This is called when the window loses focus: we release all currently pressed keys. */
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void releaseAll() {
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for ( int i = 0; i < key_down_buffer.length; i++ ) {
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if ( key_down_buffer[i] != 0 ) {
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key_down_buffer[i] = 0;
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putKeyboardEvent(i, (byte)0, 0, 0L, false);
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}
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}
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}
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private void handleKeyEvent(long event_ptr, long millis, int event_type, int event_keycode, int event_state) {
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int keycode = getKeycode(event_ptr, event_state);
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byte key_state = getKeyState(event_type);
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boolean repeat = key_state == key_down_buffer[keycode];
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if ( repeat && event_type == LinuxEvent.KeyRelease ) // This can happen for modifier keys after losing and regaining focus.
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return;
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key_down_buffer[keycode] = key_state;
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long nanos = millis*1000000;
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if (event_type == LinuxEvent.KeyPress) {
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if (has_deferred_event) {
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if (nanos == deferred_nanos && event_keycode == deferred_event_keycode) {
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has_deferred_event = false;
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repeat = true; // Repeated event
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} else
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flushDeferredEvent();
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}
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translateEvent(event_ptr, keycode, key_state, nanos, repeat);
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} else {
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flushDeferredEvent();
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has_deferred_event = true;
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deferred_keycode = keycode;
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deferred_event_keycode = event_keycode;
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deferred_nanos = nanos;
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deferred_key_state = key_state;
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}
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}
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private void flushDeferredEvent() {
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if (has_deferred_event) {
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putKeyboardEvent(deferred_keycode, deferred_key_state, 0, deferred_nanos, false);
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has_deferred_event = false;
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}
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}
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public boolean filterEvent(LinuxEvent event) {
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switch (event.getType()) {
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case LinuxEvent.KeyPress: /* Fall through */
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case LinuxEvent.KeyRelease:
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handleKeyEvent(event.getKeyAddress(), event.getKeyTime(), event.getKeyType(), event.getKeyKeyCode(), event.getKeyState());
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return true;
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default:
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break;
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}
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return false;
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}
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}
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