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- recoded wgetch and wgetnstr for greater more efficiency

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- wgetch now includes non, part and full blocking read support
This commit is contained in:
Dan Lynch 2006-06-27 10:24:40 +00:00
parent 35557914e3
commit 1c87d54bb8
1 changed files with 58 additions and 52 deletions
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110
src/hci/mucurses/kb.c
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@ -1,65 +1,74 @@
#include <curses.h>
#include <stddef.h>
#include <timer.h>
#include "core.h"
#include "input.h"
/** @file
*
* MuCurses keyboard input handling functions
*/
#define INPUT_BUFFER_LEN 80
bool echo_on = FALSE;
bool delay = FALSE;
/**
* Check KEY_ code supported status
*
* @v kc keycode value to check
* @ret TRUE KEY_* supported
* @ret FALSE KEY_* unsupported
*/
int has_key ( int ch ) {
int has_key ( int kc __unused ) {
return TRUE;
}
/**
* Push a character back onto the FIFO
*
* @v ch char to push to head of input stream
* @ret rc return status code
*/
int ungetch ( int ch ) {
stdscr->scr->pushc( stdscr->scr, ch );
return OK;
}
/**
* Pop a character from the FIFO into a window
*
* @v *win window in which to echo input
* @ret ch char from input stream
* @ret c char from input stream
*/
int wgetch ( WINDOW *win ) {
int ch;
int c, timer;
if ( win == NULL )
return ERR;
ch = win->scr->popc( win->scr );
timer = INPUT_DELAY_TIMEOUT;
while ( ! win->scr->peek( win->scr ) ) {
if ( m_delay == 0 ) // non-blocking read
return ERR;
if ( timer > 0 ) {
if ( m_delay > 0 )
timer -= INPUT_DELAY;
mdelay( INPUT_DELAY );
} else { return ERR; }
}
if ( echo_on ) {
if ( ch == KEY_LEFT || ch == KEY_BACKSPACE ) {
if ( win->curs_x == 0 ) {
wmove( win, --(win->curs_y), win->width - 1 );
wdelch( win );
} else {
wmove( win, win->curs_y, --(win->curs_x) );
c = win->scr->getc( win->scr );
if ( m_echo ) {
if ( c >= 0401 && c <= 0633 ) {
switch(c) {
case KEY_LEFT :
case KEY_BACKSPACE :
if ( win->curs_x == 0 )
wmove( win,
--(win->curs_y),
win->width - 1 );
else
wmove( win,
win->curs_y,
--(win->curs_x) );
wdelch( win );
break;
default :
beep();
break;
}
} else if ( ch >= 0401 && ch <= 0633 ) {
beep();
} else {
_wputch( win, (chtype)( ch | win->attrs ), WRAP );
_wputch( win, (chtype)( c | win->attrs ), WRAP );
}
}
return ch;
return c;
}
/**
@ -67,33 +76,30 @@ int wgetch ( WINDOW *win ) {
*
* @v *win window in which to echo input
* @v *str pointer to string in which to store result
* @ret rc return status code
*/
int wgetnstr ( WINDOW *win, char *str, int n ) {
char *str_start;
char *_str;
int c;
if ( n < 0 )
return ERR;
_str = str;
str_start = str;
for ( ; ( c = wgetch(win) ) && n; n-- ) {
if ( n == 1 ) { // last character must be a newline...
if ( c == '\n' ) {
*str = '\0';
} else { // ...otherwise beep and wait for one
beep();
++n;
continue;
while ( ( ( c = wgetch( win ) ) != KEY_ENTER ) && !( n == 0 ) ) {
if ( c >= 0401 && c <= 0633 ) {
switch(c) {
case KEY_LEFT :
case KEY_BACKSPACE :
if ( _str > str ) {
_str--; n++;
}
break;
case KEY_ENTER :
*_str = '\0';
break;
}
} else if ( c == '\n' ) {
*str = '\0';
break;
} else {
if ( c == KEY_LEFT || c == KEY_BACKSPACE ) {
if ( ! ( str == str_start ) )
str--;
} else { *str = c; str++; }
} else { // *should* only be ASCII chars now
*(_str++) = (char)c;
n--;
}
}