/*
 * Copyright 2004-2010, Haiku, Inc. All rights reserved.
 * Distributed under the terms of the MIT License.
 *
 * Authors:
 *		Jérôme Duval
 */


#include "Keymap.h"

#include <ByteOrder.h>
#include <File.h>
#include <InputServerTypes.h>
#include <Message.h>
#include <input_globals.h>

#include <errno.h>
#include <new>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>


static void
print_key(char *chars, int32 offset)
{
	int size = chars[offset++];

	switch (size) {
		case 0:
			// Not mapped
			printf("N/A");
			break;

		case 1:
			// 1-byte UTF-8/ASCII character
			printf("%c", chars[offset]);
			break;

		default:
		{
			// 2-, 3-, or 4-byte UTF-8 character
			char *str = new (std::nothrow) char[size + 1];
			if (str == NULL)
				break;

			strncpy(str, &(chars[offset]), size);
			str[size] = 0;
			printf("%s", str);
			delete [] str;
			break;
		}
	}

	printf("\t");
}


//	#pragma mark -


Keymap::Keymap()
{
	RetrieveCurrent();
}


Keymap::~Keymap()
{
}


void
Keymap::DumpKeymap()
{
	// Print a chart of the normal, shift, option, and option+shift
	// keys.
	printf("Key #\tNormal\tShift\tCaps\tC+S\tOption\tO+S\tO+C\tO+C+S\tControl\n");

	for (int i = 0; i < 128; i++) {
		printf(" 0x%x\t", i);
		print_key(fChars, fKeys.normal_map[i]);
		print_key(fChars, fKeys.shift_map[i]);
		print_key(fChars, fKeys.caps_map[i]);
		print_key(fChars, fKeys.caps_shift_map[i]);
		print_key(fChars, fKeys.option_map[i]);
		print_key(fChars, fKeys.option_shift_map[i]);
		print_key(fChars, fKeys.option_caps_map[i]);
		print_key(fChars, fKeys.option_caps_shift_map[i]);
		print_key(fChars, fKeys.control_map[i]);
		printf("\n");
	}
}


status_t
Keymap::RetrieveCurrent()
{
	Unset();

	key_map* keys;
	_get_key_map(&keys, &fChars, (ssize_t*)&fCharsSize);
	if (!keys) {
		fprintf(stderr, "error while getting current keymap!\n");
		return B_ERROR;
	}

	memcpy(&fKeys, keys, sizeof(fKeys));
	free(keys);
	return B_OK;
}