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nuttx-apps/graphics/pdcurs34/pdcurses/pdc_getch.c
Alin Jerpelea 33254aaaad apps: graphics: pdcurs34: update licenses to Apache 
Gregory Nutt is the copyright holder for those files and he has submitted the
SGA as a result we can migrate the licenses to Apache.

Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
2022-03-11 00:14:32 +02:00

551 lines
14 KiB
C
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/****************************************************************************
* apps/graphics/pdcurses/pdc_getch.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Adapted from the original public domain pdcurses by Gregory Nutt
****************************************************************************/
/* 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 - - -
*/
/****************************************************************************
* Included Files
****************************************************************************/
#include "curspriv.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#ifndef CONFIG_PDCURSES_MULTITHREAD
#define _INBUFSIZ 512 /* size of terminal input buffer */
#define NUNGETCH 256 /* max # chars to ungetch() */
#endif
/****************************************************************************
* Private Data
****************************************************************************/
#ifndef CONFIG_PDCURSES_MULTITHREAD
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 */
#endif
/****************************************************************************
* Private Functions
****************************************************************************/
static int _mouse_key(WINDOW *win)
{
#ifdef CONFIG_PDCURSES_MULTITHREAD
FAR struct pdc_context_s *ctx = PDC_ctx();
#endif
unsigned long mbe = SP->_trap_mbe;
int key = KEY_MOUSE;
int i;
/* 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;
}
/****************************************************************************
* Public Functions
****************************************************************************/
int wgetch(WINDOW *win)
{
#ifndef CONFIG_PDCURSES_MULTITHREAD
static int buffer[_INBUFSIZ]; /* character buffer */
#endif
int key, waitcount;
#ifdef CONFIG_PDCURSES_MULTITHREAD
FAR struct pdc_context_s *ctx = PDC_ctx();
#endif
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))
{
#ifndef CONFIG_PDCURSES_MULTITHREAD
return buffer[c_gindex++];
#else
return c_buffer[c_gindex++];
#endif
}
/* 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)
{
#ifndef CONFIG_PDCURSES_MULTITHREAD
buffer[c_pindex++] = key;
#else
c_buffer[c_pindex++] = key;
#endif
}
/* If we got a line */
if (key == '\n' || key == '\r')
{
#ifndef CONFIG_PDCURSES_MULTITHREAD
return buffer[c_gindex++];
#else
return c_buffer[c_gindex++];
#endif
}
}
}
int mvgetch(int y, int x)
{
#ifdef CONFIG_PDCURSES_MULTITHREAD
FAR struct pdc_context_s *ctx = PDC_ctx();
#endif
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)
{
#ifdef CONFIG_PDCURSES_MULTITHREAD
FAR struct pdc_context_s *ctx = PDC_ctx();
#endif
PDC_LOG(("ungetch() - called\n"));
if (c_ungind >= NUNGETCH) /* Pushback stack full */
{
return ERR;
}
c_ungch[c_ungind++] = ch;
return OK;
}
int flushinp(void)
{
#ifdef CONFIG_PDCURSES_MULTITHREAD
FAR struct pdc_context_s *ctx = PDC_ctx();
#endif
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)
{
#ifdef CONFIG_PDCURSES_MULTITHREAD
FAR struct pdc_context_s *ctx = PDC_ctx();
#endif
PDC_LOG(("PDC_get_key_modifiers() - called\n"));
return pdc_key_modifiers;
}
int PDC_save_key_modifiers(bool flag)
{
#ifdef CONFIG_PDCURSES_MULTITHREAD
FAR struct pdc_context_s *ctx = PDC_ctx();
#endif
PDC_LOG(("PDC_save_key_modifiers() - called\n"));
SP->save_key_modifiers = flag;
return OK;
}
int PDC_return_key_modifiers(bool flag)
{
#ifdef CONFIG_PDCURSES_MULTITHREAD
FAR struct pdc_context_s *ctx = PDC_ctx();
#endif
PDC_LOG(("PDC_return_key_modifiers() - called\n"));
SP->return_key_modifiers = flag;
return PDC_modifiers_set();
}
#ifdef CONFIG_PDCURSES_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)
{
#ifdef CONFIG_PDCURSES_MULTITHREAD
FAR struct pdc_context_s *ctx = PDC_ctx();
#endif
PDC_LOG(("get_wch() - called\n"));
return wget_wch(stdscr, wch);
}
int mvget_wch(int y, int x, wint_t *wch)
{
#ifdef CONFIG_PDCURSES_MULTITHREAD
FAR struct pdc_context_s *ctx = PDC_ctx();
#endif
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
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