#if !defined(lint) && !defined(DOS) static char rcsid[] = "$Id: tty.c 769 2007-10-24 00:15:40Z hubert@u.washington.edu $"; #endif /* * ======================================================================== * Copyright 2006-2007 University of Washington * Copyright 2013-2017 Eduardo Chappa * * Licensed 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 * * ======================================================================== * * Program: tty routines */ #include #include #include "../estruct.h" #include "../mode.h" #include "../pico.h" #include "../edef.h" #include "../efunc.h" #include "../keydefs.h" #include "signals.h" #ifndef _WINDOWS #include "terminal.h" #include "raw.h" #include "read.h" #else #include "mswin.h" #endif /* _WINDOWS */ #ifdef MOUSE #include "mouse.h" #endif /* MOUSE */ #include "tty.h" #ifndef _WINDOWS /* * ttopen - this function is called once to set up the terminal device * streams. if called as pine composer, don't mess with * tty modes, but set signal handlers. */ int ttopen(void) { if(Pmaster == NULL){ Raw(1); #ifdef MOUSE if(gmode & MDMOUSE) init_mouse(); #endif /* MOUSE */ xonxoff_proc(preserve_start_stop); } picosigs(); return(1); } /* * ttclose - this function gets called just before we go back home to * the command interpreter. If called as pine composer, don't * worry about modes, but set signals to default, pine will * rewire things as needed. */ int ttclose(void) { if(Pmaster){ signal(SIGHUP, SIG_DFL); #ifdef SIGCONT signal(SIGCONT, SIG_DFL); #endif #if defined(SIGWINCH) && defined(TIOCGWINSZ) signal(SIGWINCH, SIG_DFL); #endif } else{ Raw(0); #ifdef MOUSE end_mouse(); #endif } return(1); } /* * ttgetc - Read a character from the terminal, performing no editing * and doing no echo at all. * * Args: return_on_intr -- Function to get a single character from stdin, * recorder -- If non-NULL, function used to record keystroke. * bail_handler -- Function used to bail out on read error. * * Returns: The character read from stdin. * Return_on_intr is returned if read is interrupted. * If read error, BAIL_OUT is returned unless bail_handler is * non-NULL, in which case it is called (and usually it exits). * * If recorder is non-null, it is used to record the keystroke. */ int ttgetc(int return_on_intr, int (*recorder)(int), void (*bail_handler)(void)) { int c; switch(c = read_one_char()){ case READ_INTR: return(return_on_intr); case BAIL_OUT: if(bail_handler) (*bail_handler)(); else return(BAIL_OUT); default: return(recorder ? (*recorder)(c) : c); } } /* * Simple version of ttgetc with simple error handling * * Args: recorder -- If non-NULL, function used to record keystroke. * bail_handler -- Function used to bail out on read error. * * Returns: The character read from stdin. * If read error, BAIL_OUT is returned unless bail_handler is * non-NULL, in which case it is called (and usually it exits). * * If recorder is non-null, it is used to record the keystroke. * Retries if interrupted. */ int simple_ttgetc(int (*recorder)(int), void (*bail_handler)(void)) { int res; unsigned char c; while((res = read(STDIN_FD, &c, 1)) <= 0) if(!(res < 0 && errno == EINTR)) (*bail_handler)(); return(recorder ? (*recorder)((int)c) : (int)c); } /* * ttputc - Write a character to the display. */ int ttputc(UCS ucs) { unsigned char obuf[MAX(MB_LEN_MAX,32)]; int r, i, width = 0, outchars = 0; int ret = 0; if(ucs < 0x80) return(putchar((unsigned char) ucs)); width = wcellwidth(ucs); if(width < 0){ width = 1; obuf[outchars++] = '?'; } else{ /* * Convert the ucs into the multibyte * character that corresponds to the * ucs in the users locale. */ outchars = wtomb((char *) obuf, ucs); if(outchars < 0){ width = 1; obuf[0] = '?'; outchars = 1; } } for(i = 0; i < outchars; i++){ r = putchar(obuf[i]); ret = (ret == EOF) ? EOF : r; } return(ret); } /* * ttflush - flush terminal buffer. Does real work where the terminal * output is buffered up. A no-operation on systems where byte * at a time terminal I/O is done. */ int ttflush(void) { return(fflush(stdout)); } /* * ttresize - recompute the screen dimensions if necessary, and then * adjust pico's internal buffers accordingly. */ void ttresize(void) { int row = -1, col = -1; ttgetwinsz(&row, &col); resize_pico(row, col); } /* * ttgetwinsz - set global row and column values (if we can get them) * and return. */ void ttgetwinsz(int *row, int *col) { extern int _tlines, _tcolumns; if(*row < 0) *row = (_tlines > 0) ? _tlines - 1 : NROW - 1; if(*col <= 0) *col = (_tcolumns > 0) ? _tcolumns : NCOL; #if defined(SIGWINCH) && defined(TIOCGWINSZ) { struct winsize win; if (ioctl(0, TIOCGWINSZ, &win) == 0) { /* set to anything useful.. */ if(win.ws_row) /* ... the tty drivers says */ *row = win.ws_row - 1; if(win.ws_col) *col = win.ws_col; } signal(SIGWINCH, winch_handler); /* window size changes */ } #endif if(*col > NLINE-1) *col = NLINE-1; } #else /* _WINDOWS */ #define MARGIN 8 /* size of minimim margin and */ #define SCRSIZ 64 /* scroll size for extended lines */ #define MROW 2 /* rows in menu */ /* internal prototypes */ int mswin_resize (int, int); /* * Standard terminal interface dispatch table. Fields point to functions * that operate the terminal. All these functions live in mswin.c, but * this structure is defined here because it is specific to pico. */ TERM term = { 0, 0, MARGIN, MROW, ttopen, NULL, ttclose, NULL, /* was mswin_getc, but not used? */ mswin_putc, mswin_flush, mswin_move, mswin_eeol, mswin_eeop, mswin_beep, mswin_rev }; /* * This function is called once to set up the terminal device streams. */ int ttopen(void) { int rows, columns; mswin_getscreensize (&rows, &columns); term.t_nrow = rows - 1; term.t_ncol = columns; /* term.t_scrsiz = (columns * 2) / 3; */ /* * Do we implement optimized character insertion and deletion? * o_insert() and o_delete() */ /* inschar = delchar = FALSE; */ /* revexist = TRUE; dead code? */ mswin_setresizecallback (mswin_resize); init_mouse(); return(1); } /* * This function gets called just before we go back home to the command * interpreter. */ int ttclose(void) { mswin_clearresizecallback (mswin_resize); return(1); } /* * Flush terminal buffer. Does real work where the terminal output is buffered * up. A no-operation on systems where byte at a time terminal I/O is done. */ int ttflush(void) { return(1); } /* * ttresize - recompute the screen dimensions if necessary, and then * adjust pico's internal buffers accordingly. */ void ttresize(void) { int row, col; mswin_getscreensize(&row, &col); resize_pico (row-1, col); } /* * mswin_resize - windows specific callback to set pico's internal tables * to new screen dimensions. */ int mswin_resize(int row, int col) { if (wheadp) resize_pico (row-1, col); return (0); } #endif /* _WINDOWS */