323 lines
8.8 KiB
C++
323 lines
8.8 KiB
C++
/*
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* Copyright (c) 2002 Light Weight Java Game Library 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 'Light Weight Java Game Library' 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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/**
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* $Id$
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*
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* Linux keyboard handling.
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*
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* @author elias_naur <elias_naur@users.sourceforge.net>
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* @version $Revision$
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*/
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#include <X11/X.h>
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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#include <string.h>
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#include <assert.h>
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#include "org_lwjgl_input_Keyboard.h"
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#define KEYBOARD_BUFFER_SIZE 50
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#define KEYBOARD_SIZE 256
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#define KEY_EVENT_BACKLOG 20
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unsigned char readBuffer[KEYBOARD_BUFFER_SIZE * 2];
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jfieldID fid_readBuffer;
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unsigned char key_buf[KEYBOARD_SIZE];
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unsigned char key_map[KEYBOARD_SIZE];
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XKeyEvent saved_key_events[KEY_EVENT_BACKLOG];
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int list_start = 0;
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int list_end = 0;
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bool keyboard_grabbed;
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bool buffer_enabled;
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bool translation_enabled;
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extern Display *disp;
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extern Window win;
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extern int current_fullscreen;
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extern int isFocused(void);
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/*
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* Class: org_lwjgl_input_Keyboard
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* Method: initIDs
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* Signature: ()V
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*/
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JNIEXPORT void JNICALL Java_org_lwjgl_input_Keyboard_initIDs
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(JNIEnv * env, jclass clazz)
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{
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// Get a global class instance, just to be sure
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static jobject globalClassLock = NULL;
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if (globalClassLock == NULL) {
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globalClassLock = env->NewGlobalRef(clazz);
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}
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fid_readBuffer = env->GetStaticFieldID(clazz, "readBuffer", "Ljava/nio/ByteBuffer;");
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}
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int grabKeyboard(void) {
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int result = XGrabKeyboard(disp, win, False, GrabModeAsync, GrabModeAsync, CurrentTime);
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if (result == GrabSuccess)
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keyboard_grabbed = true;
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return result;
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}
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void ungrabKeyboard(void) {
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keyboard_grabbed = false;
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XUngrabKeyboard(disp, CurrentTime);
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}
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int updateKeyboardGrab(void) {
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if (current_fullscreen) {
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if (!keyboard_grabbed)
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return grabKeyboard();
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} else {
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if (isFocused()) {
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if (!keyboard_grabbed)
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return grabKeyboard();
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} else {
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if (keyboard_grabbed)
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ungrabKeyboard();
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}
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}
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return GrabSuccess;
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}
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/*
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* Class: org_lwjgl_input_Keyboard
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* Method: nCreate
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* Signature: ()Z
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*/
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JNIEXPORT jboolean JNICALL Java_org_lwjgl_input_Keyboard_nCreate
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(JNIEnv * env, jclass clazz)
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{
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keyboard_grabbed = false;
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translation_enabled = false;
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buffer_enabled = false;
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if (updateKeyboardGrab() != GrabSuccess) {
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#ifdef _DEBUG
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printf("Could not grab keyboard\n");
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#endif
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return JNI_FALSE;
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}
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for (int i = 0; i < KEYBOARD_SIZE; i++)
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key_map[i] = i;
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key_map[0x6b] = 0xdb; // Left doze key
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key_map[0x6c] = 0xdc; // Right doze key
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key_map[0x6d] = 0xdd; // Apps key
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key_map[0x5a] = 0xc8; // Up arrow
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key_map[0x5c] = 0xcb; // Left arrow
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key_map[0x5e] = 0xcd; // Right arrow
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key_map[0x60] = 0xd0; // Down arrow
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key_map[0x59] = 0xc7; // Home
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key_map[0x62] = 0xd2; // Insert
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key_map[0x63] = 0xd3; // Delete
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key_map[0x5f] = 0xcf; // End
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key_map[0x5b] = 0xc9; // Page up
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key_map[0x61] = 0xd1; // Page down
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key_map[0x67] = 0xb7; // SysRQ
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key_map[0x66] = 0xc5; // Pause
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key_map[0x64] = 0x9c; // Numpad enter
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key_map[0x65] = 0x9d; // Right control
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key_map[0x68] = 0xb5; // Numpad divide
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memset(key_buf, 0, KEYBOARD_SIZE*sizeof(unsigned char));
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return JNI_TRUE;
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}
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/*
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* Class: org_lwjgl_input_Keyboard
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* Method: nDestroy
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* Signature: ()V
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*/
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JNIEXPORT void JNICALL Java_org_lwjgl_input_Keyboard_nDestroy
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(JNIEnv * env, jclass clazz)
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{
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if (keyboard_grabbed)
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ungrabKeyboard();
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}
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XKeyEvent *nextEventElement(void) {
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if (list_start == list_end)
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return NULL;
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XKeyEvent *result = &(saved_key_events[list_start]);
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list_start = (list_start + 1)%KEY_EVENT_BACKLOG;
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return result;
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}
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void putEventElement(XKeyEvent *event) {
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int next_index = (list_end + 1)%KEY_EVENT_BACKLOG;
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if (next_index == list_start)
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return;
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saved_key_events[list_end] = *event;
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list_end = next_index;
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}
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unsigned char getKeycode(XKeyEvent *event) {
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unsigned char keycode = (unsigned char)((event->keycode - 8) & 0xff);
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keycode = key_map[keycode];
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return keycode;
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}
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int translateEvent(int *position, XKeyEvent *event) {
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static char temp_translation_buffer[KEYBOARD_BUFFER_SIZE];
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static XComposeStatus status;
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int num_chars, i;
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if (*position >= KEYBOARD_BUFFER_SIZE * 2)
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return 0;
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if (event->type == KeyRelease) {
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readBuffer[(*position)++] = 0;
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readBuffer[(*position)++] = 0;
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return 0;
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}
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num_chars = XLookupString(event, temp_translation_buffer, KEYBOARD_BUFFER_SIZE, NULL, &status);
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if (num_chars > 0) {
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num_chars--;
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/* Assume little endian byte order */
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readBuffer[(*position)++] = temp_translation_buffer[0];
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readBuffer[(*position)++] = 0;
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for (i = 0; i < num_chars; i++) {
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readBuffer[(*position)++] = 0;
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readBuffer[(*position)++] = 0;
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readBuffer[(*position)++] = temp_translation_buffer[i + 1];
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readBuffer[(*position)++] = 0;
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}
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} else {
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readBuffer[(*position)++] = 0;
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readBuffer[(*position)++] = 0;
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}
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return num_chars;
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}
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unsigned char eventState(XKeyEvent *event) {
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if (event->type == KeyPress) {
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return 1;
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} else if (event->type == KeyRelease) {
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return 0;
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} else
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assert(0);
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}
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/*
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* Class: org_lwjgl_input_Keyboard
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* Method: nPoll
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* Signature: (I)V
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*/
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JNIEXPORT void JNICALL Java_org_lwjgl_input_Keyboard_nPoll
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(JNIEnv * env, jclass clazz, jint buf)
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{
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XEvent event;
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unsigned char state;
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updateKeyboardGrab();
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while (XCheckMaskEvent(disp, KeyPressMask | KeyReleaseMask, &event)) {
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unsigned char keycode = getKeycode(&(event.xkey));
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state = eventState(&(event.xkey));
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key_buf[keycode] = state;
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if (buffer_enabled)
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putEventElement(&(event.xkey));
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}
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memcpy((unsigned char*)buf, key_buf, KEYBOARD_SIZE*sizeof(unsigned char));
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}
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/*
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* Class: org_lwjgl_input_Keyboard
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* Method: nRead
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* Signature: (I)V
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*/
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JNIEXPORT int JNICALL Java_org_lwjgl_input_Keyboard_nRead
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(JNIEnv * env, jclass clazz)
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{
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XEvent event;
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XKeyEvent *key_event;
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int buf_count = 0;
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int state;
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int num_events = 0;
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updateKeyboardGrab();
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while (buf_count < KEYBOARD_BUFFER_SIZE * 2 && (key_event = nextEventElement()) != NULL) {
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num_events++;
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unsigned char keycode = getKeycode(key_event);
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unsigned char state = eventState(key_event);
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// printf("Reading a key %d %d count %d\n", (int)keycode, (int)state, num_events);
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readBuffer[buf_count++] = keycode;
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readBuffer[buf_count++] = state;
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if (translation_enabled)
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num_events += translateEvent(&buf_count, key_event);
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}
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while (buf_count < KEYBOARD_BUFFER_SIZE * 2 && XCheckMaskEvent(disp, KeyPressMask | KeyReleaseMask, &event)) {
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num_events++;
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unsigned char keycode = getKeycode(&(event.xkey));
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unsigned char state = eventState(&(event.xkey));
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// printf("Reading a key %d %d count %d\n", (int)keycode, (int)state, num_events);
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key_buf[keycode] = state;
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readBuffer[buf_count++] = keycode;
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readBuffer[buf_count++] = state;
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if (translation_enabled)
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num_events += translateEvent(&buf_count, &(event.xkey));
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}
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return num_events;
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}
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/*
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* Class: org_lwjgl_input_Keyboard
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* Method: nEnableTranslation
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* Signature: ()I
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*/
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JNIEXPORT void JNICALL Java_org_lwjgl_input_Keyboard_nEnableTranslation
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(JNIEnv *env, jclass clazz)
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{
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translation_enabled = true;
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}
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/*
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* Class: org_lwjgl_input_Keyboard
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* Method: nEnableBuffer
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* Signature: ()I
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*/
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JNIEXPORT jint JNICALL Java_org_lwjgl_input_Keyboard_nEnableBuffer
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(JNIEnv * env, jclass clazz)
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{
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jobject newBuffer = env->NewDirectByteBuffer(&readBuffer, KEYBOARD_BUFFER_SIZE * 2);
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env->SetStaticObjectField(clazz, fid_readBuffer, newBuffer);
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buffer_enabled = true;
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return KEYBOARD_BUFFER_SIZE;
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}
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