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#include <engine/e_client_interface.h>
#include <string.h> // strlen
#include "lineinput.hpp"
LINEINPUT::LINEINPUT()
{
clear();
}
void LINEINPUT::clear()
{
mem_zero(str, sizeof(str));
len = 0;
cursor_pos = 0;
}
void LINEINPUT::set(const char *string)
{
str_copy(str, string, sizeof(str));
len = strlen(str);
cursor_pos = len;
}
void LINEINPUT::manipulate(INPUT_EVENT e, char *str, int str_max_size, int *str_len_ptr, int *cursor_pos_ptr)
{
int cursor_pos = *cursor_pos_ptr;
int len = *str_len_ptr;
if(cursor_pos > len)
cursor_pos = len;
int code = e.unicode;
int k = e.key;
// 127 is produced on Mac OS X and corresponds to the delete key
if (!(code >= 0 && code < 32) && code != 127)
{
char tmp[8];
int charsize = str_utf8_encode(tmp, code);
if (len < str_max_size - charsize && cursor_pos < str_max_size - charsize)
{
memmove(str + cursor_pos + charsize, str + cursor_pos, len - cursor_pos + charsize);
for(int i = 0; i < charsize; i++)
str[cursor_pos+i] = tmp[i];
cursor_pos += charsize;
len += charsize;
}
}
if(e.flags&INPFLAG_PRESS)
{
if (k == KEY_BACKSPACE && cursor_pos > 0)
{
int new_cursor_pos = str_utf8_rewind(str, cursor_pos);
int charsize = cursor_pos-new_cursor_pos;
memmove(str+new_cursor_pos, str+cursor_pos, len - charsize + 1); // +1 == null term
cursor_pos = new_cursor_pos;
len -= charsize;
}
else if (k == KEY_DELETE && cursor_pos < len)
{
int p = str_utf8_forward(str, cursor_pos);
int charsize = p-cursor_pos;
memmove(str + cursor_pos, str + cursor_pos + charsize, len - cursor_pos - charsize + 1); // +1 == null term
len -= charsize;
}
else if (k == KEY_LEFT && cursor_pos > 0)
cursor_pos = str_utf8_rewind(str, cursor_pos);
else if (k == KEY_RIGHT && cursor_pos < len)
cursor_pos = str_utf8_forward(str, cursor_pos);
else if (k == KEY_HOME)
cursor_pos = 0;
else if (k == KEY_END)
cursor_pos = len;
}
*cursor_pos_ptr = cursor_pos;
*str_len_ptr = len;
}
void LINEINPUT::process_input(INPUT_EVENT e)
{
manipulate(e, str, sizeof(str), &len, &cursor_pos);
}
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