411 lines
11 KiB
C
411 lines
11 KiB
C
|
/* Public Domain Curses */
|
||
|
|
|
||
|
|
#include <curspriv.h>
|
||
|
|
|
||
|
|
RCSID("$Id: getch.c,v 1.72 2008/07/13 16:08:18 wmcbrine Exp $")
|
||
|
|
|
||
|
|
/*man-start**************************************************************
|
||
|
|
|
||
|
|
Name: getch
|
||
|
|
|
||
|
|
Synopsis:
|
||
|
|
int getch(void);
|
||
|
|
int wgetch(WINDOW *win);
|
||
|
|
int mvgetch(int y, int x);
|
||
|
|
int mvwgetch(WINDOW *win, int y, int x);
|
||
|
|
int ungetch(int ch);
|
||
|
|
int flushinp(void);
|
||
|
|
|
||
|
|
int get_wch(wint_t *wch);
|
||
|
|
int wget_wch(WINDOW *win, wint_t *wch);
|
||
|
|
int mvget_wch(int y, int x, wint_t *wch);
|
||
|
|
int mvwget_wch(WINDOW *win, int y, int x, wint_t *wch);
|
||
|
|
int unget_wch(const wchar_t wch);
|
||
|
|
|
||
|
|
unsigned long PDC_get_key_modifiers(void);
|
||
|
|
int PDC_save_key_modifiers(bool flag);
|
||
|
|
int PDC_return_key_modifiers(bool flag);
|
||
|
|
|
||
|
|
Description:
|
||
|
|
With the getch(), wgetch(), mvgetch(), and mvwgetch() functions,
|
||
|
|
a character is read from the terminal associated with the window.
|
||
|
|
In nodelay mode, if there is no input waiting, the value ERR is
|
||
|
|
returned. In delay mode, the program will hang until the system
|
||
|
|
passes text through to the program. Depending on the setting of
|
||
|
|
cbreak(), this will be after one character or after the first
|
||
|
|
newline. Unless noecho() has been set, the character will also
|
||
|
|
be echoed into the designated window.
|
||
|
|
|
||
|
|
If keypad() is TRUE, and a function key is pressed, the token for
|
||
|
|
that function key will be returned instead of the raw characters.
|
||
|
|
Possible function keys are defined in <curses.h> with integers
|
||
|
|
beginning with 0401, whose names begin with KEY_.
|
||
|
|
|
||
|
|
If nodelay(win, TRUE) has been called on the window and no input
|
||
|
|
is waiting, the value ERR is returned.
|
||
|
|
|
||
|
|
ungetch() places ch back onto the input queue to be returned by
|
||
|
|
the next call to wgetch().
|
||
|
|
|
||
|
|
flushinp() throws away any type-ahead that has been typed by the
|
||
|
|
user and has not yet been read by the program.
|
||
|
|
|
||
|
|
PDC_get_key_modifiers() returns the keyboard modifiers (shift,
|
||
|
|
control, alt, numlock) effective at the time of the last getch()
|
||
|
|
call, if PDC_save_key_modifiers(TRUE) has been called before the
|
||
|
|
getch(). Use the macros PDC_KEY_MODIFIER_* to determine which
|
||
|
|
modifier(s) were set. PDC_return_key_modifiers() tells getch()
|
||
|
|
to return modifier keys pressed alone as keystrokes (KEY_ALT_L,
|
||
|
|
etc.). These may not work on all platforms.
|
||
|
|
|
||
|
|
NOTE: getch() and ungetch() are implemented as macros, to avoid
|
||
|
|
conflict with many DOS compiler's runtime libraries.
|
||
|
|
|
||
|
|
Return Value:
|
||
|
|
These functions return ERR or the value of the character, meta
|
||
|
|
character or function key token.
|
||
|
|
|
||
|
|
Portability X/Open BSD SYS V
|
||
|
|
getch Y Y Y
|
||
|
|
wgetch Y Y Y
|
||
|
|
mvgetch Y Y Y
|
||
|
|
mvwgetch Y Y Y
|
||
|
|
ungetch Y Y Y
|
||
|
|
flushinp Y Y Y
|
||
|
|
get_wch Y
|
||
|
|
wget_wch Y
|
||
|
|
mvget_wch Y
|
||
|
|
mvwget_wch Y
|
||
|
|
unget_wch Y
|
||
|
|
PDC_get_key_modifiers - - -
|
||
|
|
|
||
|
|
**man-end****************************************************************/
|
||
|
|
|
||
|
|
#define _INBUFSIZ 512 /* size of terminal input buffer */
|
||
|
|
#define NUNGETCH 256 /* max # chars to ungetch() */
|
||
|
|
|
||
|
|
static int c_pindex = 0; /* putter index */
|
||
|
|
static int c_gindex = 1; /* getter index */
|
||
|
|
static int c_ungind = 0; /* ungetch() push index */
|
||
|
|
static int c_ungch[NUNGETCH]; /* array of ungotten chars */
|
||
|
|
|
||
|
|
static int _mouse_key(WINDOW *win)
|
||
|
|
{
|
||
|
|
int i, key = KEY_MOUSE;
|
||
|
|
unsigned long mbe = SP->_trap_mbe;
|
||
|
|
|
||
|
|
/* Filter unwanted mouse events */
|
||
|
|
|
||
|
|
for (i = 0; i < 3; i++)
|
||
|
|
{
|
||
|
|
if (pdc_mouse_status.changes & (1 << i))
|
||
|
|
{
|
||
|
|
int shf = i * 5;
|
||
|
|
short button = pdc_mouse_status.button[i] & BUTTON_ACTION_MASK;
|
||
|
|
|
||
|
|
if ( (!(mbe & (BUTTON1_PRESSED << shf)) &&
|
||
|
|
(button == BUTTON_PRESSED))
|
||
|
|
|
||
|
|
|| (!(mbe & (BUTTON1_CLICKED << shf)) &&
|
||
|
|
(button == BUTTON_CLICKED))
|
||
|
|
|
||
|
|
|| (!(mbe & (BUTTON1_DOUBLE_CLICKED << shf)) &&
|
||
|
|
(button == BUTTON_DOUBLE_CLICKED))
|
||
|
|
|
||
|
|
|| (!(mbe & (BUTTON1_MOVED << shf)) &&
|
||
|
|
(button == BUTTON_MOVED))
|
||
|
|
|
||
|
|
|| (!(mbe & (BUTTON1_RELEASED << shf)) &&
|
||
|
|
(button == BUTTON_RELEASED))
|
||
|
|
)
|
||
|
|
pdc_mouse_status.changes ^= (1 << i);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (pdc_mouse_status.changes & PDC_MOUSE_MOVED)
|
||
|
|
{
|
||
|
|
if (!(mbe & (BUTTON1_MOVED|BUTTON2_MOVED|BUTTON3_MOVED)))
|
||
|
|
pdc_mouse_status.changes ^= PDC_MOUSE_MOVED;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (pdc_mouse_status.changes &
|
||
|
|
(PDC_MOUSE_WHEEL_UP|PDC_MOUSE_WHEEL_DOWN))
|
||
|
|
{
|
||
|
|
if (!(mbe & MOUSE_WHEEL_SCROLL))
|
||
|
|
pdc_mouse_status.changes &=
|
||
|
|
~(PDC_MOUSE_WHEEL_UP|PDC_MOUSE_WHEEL_DOWN);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!pdc_mouse_status.changes)
|
||
|
|
return -1;
|
||
|
|
|
||
|
|
/* Check for click in slk area */
|
||
|
|
|
||
|
|
i = PDC_mouse_in_slk(pdc_mouse_status.y, pdc_mouse_status.x);
|
||
|
|
|
||
|
|
if (i)
|
||
|
|
{
|
||
|
|
if (pdc_mouse_status.button[0] & (BUTTON_PRESSED|BUTTON_CLICKED))
|
||
|
|
key = KEY_F(i);
|
||
|
|
else
|
||
|
|
key = -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
return key;
|
||
|
|
}
|
||
|
|
|
||
|
|
int wgetch(WINDOW *win)
|
||
|
|
{
|
||
|
|
static int buffer[_INBUFSIZ]; /* character buffer */
|
||
|
|
int key, waitcount;
|
||
|
|
|
||
|
|
PDC_LOG(("wgetch() - called\n"));
|
||
|
|
|
||
|
|
if (!win)
|
||
|
|
return ERR;
|
||
|
|
|
||
|
|
waitcount = 0;
|
||
|
|
|
||
|
|
/* set the number of 1/20th second napms() calls */
|
||
|
|
|
||
|
|
if (SP->delaytenths)
|
||
|
|
waitcount = 2 * SP->delaytenths;
|
||
|
|
else
|
||
|
|
if (win->_delayms)
|
||
|
|
{
|
||
|
|
/* Can't really do millisecond intervals, so delay in
|
||
|
|
1/20ths of a second (50ms) */
|
||
|
|
|
||
|
|
waitcount = win->_delayms / 50;
|
||
|
|
if (!waitcount)
|
||
|
|
waitcount = 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* refresh window when wgetch is called if there have been changes
|
||
|
|
to it and it is not a pad */
|
||
|
|
|
||
|
|
if (!(win->_flags & _PAD) && ((!win->_leaveit &&
|
||
|
|
(win->_begx + win->_curx != SP->curscol ||
|
||
|
|
win->_begy + win->_cury != SP->cursrow)) || is_wintouched(win)))
|
||
|
|
wrefresh(win);
|
||
|
|
|
||
|
|
/* if ungotten char exists, remove and return it */
|
||
|
|
|
||
|
|
if (c_ungind)
|
||
|
|
return c_ungch[--c_ungind];
|
||
|
|
|
||
|
|
/* if normal and data in buffer */
|
||
|
|
|
||
|
|
if ((!SP->raw_inp && !SP->cbreak) && (c_gindex < c_pindex))
|
||
|
|
return buffer[c_gindex++];
|
||
|
|
|
||
|
|
/* prepare to buffer data */
|
||
|
|
|
||
|
|
c_pindex = 0;
|
||
|
|
c_gindex = 0;
|
||
|
|
|
||
|
|
/* to get here, no keys are buffered. go and get one. */
|
||
|
|
|
||
|
|
for (;;) /* loop for any buffering */
|
||
|
|
{
|
||
|
|
/* is there a keystroke ready? */
|
||
|
|
|
||
|
|
if (!PDC_check_key())
|
||
|
|
{
|
||
|
|
/* if not, handle timeout() and halfdelay() */
|
||
|
|
|
||
|
|
if (SP->delaytenths || win->_delayms)
|
||
|
|
{
|
||
|
|
if (!waitcount)
|
||
|
|
return ERR;
|
||
|
|
|
||
|
|
waitcount--;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
if (win->_nodelay)
|
||
|
|
return ERR;
|
||
|
|
|
||
|
|
napms(50); /* sleep for 1/20th second */
|
||
|
|
continue; /* then check again */
|
||
|
|
}
|
||
|
|
|
||
|
|
/* if there is, fetch it */
|
||
|
|
|
||
|
|
key = PDC_get_key();
|
||
|
|
|
||
|
|
if (SP->key_code)
|
||
|
|
{
|
||
|
|
/* filter special keys if not in keypad mode */
|
||
|
|
|
||
|
|
if (!win->_use_keypad)
|
||
|
|
key = -1;
|
||
|
|
|
||
|
|
/* filter mouse events; translate mouse clicks in the slk
|
||
|
|
area to function keys */
|
||
|
|
|
||
|
|
else if (key == KEY_MOUSE)
|
||
|
|
key = _mouse_key(win);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* unwanted key? loop back */
|
||
|
|
|
||
|
|
if (key == -1)
|
||
|
|
continue;
|
||
|
|
|
||
|
|
/* translate CR */
|
||
|
|
|
||
|
|
if (key == '\r' && SP->autocr && !SP->raw_inp)
|
||
|
|
key = '\n';
|
||
|
|
|
||
|
|
/* if echo is enabled */
|
||
|
|
|
||
|
|
if (SP->echo && !SP->key_code)
|
||
|
|
{
|
||
|
|
waddch(win, key);
|
||
|
|
wrefresh(win);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* if no buffering */
|
||
|
|
|
||
|
|
if (SP->raw_inp || SP->cbreak)
|
||
|
|
return key;
|
||
|
|
|
||
|
|
/* if no overflow, put data in buffer */
|
||
|
|
|
||
|
|
if (key == '\b')
|
||
|
|
{
|
||
|
|
if (c_pindex > c_gindex)
|
||
|
|
c_pindex--;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
if (c_pindex < _INBUFSIZ - 2)
|
||
|
|
buffer[c_pindex++] = key;
|
||
|
|
|
||
|
|
/* if we got a line */
|
||
|
|
|
||
|
|
if (key == '\n' || key == '\r')
|
||
|
|
return buffer[c_gindex++];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
int mvgetch(int y, int x)
|
||
|
|
{
|
||
|
|
PDC_LOG(("mvgetch() - called\n"));
|
||
|
|
|
||
|
|
if (move(y, x) == ERR)
|
||
|
|
return ERR;
|
||
|
|
|
||
|
|
return wgetch(stdscr);
|
||
|
|
}
|
||
|
|
|
||
|
|
int mvwgetch(WINDOW *win, int y, int x)
|
||
|
|
{
|
||
|
|
PDC_LOG(("mvwgetch() - called\n"));
|
||
|
|
|
||
|
|
if (wmove(win, y, x) == ERR)
|
||
|
|
return ERR;
|
||
|
|
|
||
|
|
return wgetch(win);
|
||
|
|
}
|
||
|
|
|
||
|
|
int PDC_ungetch(int ch)
|
||
|
|
{
|
||
|
|
PDC_LOG(("ungetch() - called\n"));
|
||
|
|
|
||
|
|
if (c_ungind >= NUNGETCH) /* pushback stack full */
|
||
|
|
return ERR;
|
||
|
|
|
||
|
|
c_ungch[c_ungind++] = ch;
|
||
|
|
|
||
|
|
return OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
int flushinp(void)
|
||
|
|
{
|
||
|
|
PDC_LOG(("flushinp() - called\n"));
|
||
|
|
|
||
|
|
PDC_flushinp();
|
||
|
|
|
||
|
|
c_gindex = 1; /* set indices to kill buffer */
|
||
|
|
c_pindex = 0;
|
||
|
|
c_ungind = 0; /* clear c_ungch array */
|
||
|
|
|
||
|
|
return OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
unsigned long PDC_get_key_modifiers(void)
|
||
|
|
{
|
||
|
|
PDC_LOG(("PDC_get_key_modifiers() - called\n"));
|
||
|
|
|
||
|
|
return pdc_key_modifiers;
|
||
|
|
}
|
||
|
|
|
||
|
|
int PDC_save_key_modifiers(bool flag)
|
||
|
|
{
|
||
|
|
PDC_LOG(("PDC_save_key_modifiers() - called\n"));
|
||
|
|
|
||
|
|
SP->save_key_modifiers = flag;
|
||
|
|
return OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
int PDC_return_key_modifiers(bool flag)
|
||
|
|
{
|
||
|
|
PDC_LOG(("PDC_return_key_modifiers() - called\n"));
|
||
|
|
|
||
|
|
SP->return_key_modifiers = flag;
|
||
|
|
return PDC_modifiers_set();
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifdef PDC_WIDE
|
||
|
|
int wget_wch(WINDOW *win, wint_t *wch)
|
||
|
|
{
|
||
|
|
int key;
|
||
|
|
|
||
|
|
PDC_LOG(("wget_wch() - called\n"));
|
||
|
|
|
||
|
|
if (!wch)
|
||
|
|
return ERR;
|
||
|
|
|
||
|
|
key = wgetch(win);
|
||
|
|
|
||
|
|
if (key == ERR)
|
||
|
|
return ERR;
|
||
|
|
|
||
|
|
*wch = key;
|
||
|
|
|
||
|
|
return SP->key_code ? KEY_CODE_YES : OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
int get_wch(wint_t *wch)
|
||
|
|
{
|
||
|
|
PDC_LOG(("get_wch() - called\n"));
|
||
|
|
|
||
|
|
return wget_wch(stdscr, wch);
|
||
|
|
}
|
||
|
|
|
||
|
|
int mvget_wch(int y, int x, wint_t *wch)
|
||
|
|
{
|
||
|
|
PDC_LOG(("mvget_wch() - called\n"));
|
||
|
|
|
||
|
|
if (move(y, x) == ERR)
|
||
|
|
return ERR;
|
||
|
|
|
||
|
|
return wget_wch(stdscr, wch);
|
||
|
|
}
|
||
|
|
|
||
|
|
int mvwget_wch(WINDOW *win, int y, int x, wint_t *wch)
|
||
|
|
{
|
||
|
|
PDC_LOG(("mvwget_wch() - called\n"));
|
||
|
|
|
||
|
|
if (wmove(win, y, x) == ERR)
|
||
|
|
return ERR;
|
||
|
|
|
||
|
|
return wget_wch(win, wch);
|
||
|
|
}
|
||
|
|
|
||
|
|
int unget_wch(const wchar_t wch)
|
||
|
|
{
|
||
|
|
return PDC_ungetch(wch);
|
||
|
|
}
|
||
|
|
#endif
|