257 lines
6.4 KiB
C
257 lines
6.4 KiB
C
/* Public Domain Curses */
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#include <curspriv.h>
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RCSID("$Id: kernel.c,v 1.78 2008/07/15 17:13:26 wmcbrine Exp $")
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/*man-start**************************************************************
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Name: kernel
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Synopsis:
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int def_prog_mode(void);
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int def_shell_mode(void);
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int reset_prog_mode(void);
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int reset_shell_mode(void);
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int resetty(void);
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int savetty(void);
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int ripoffline(int line, int (*init)(WINDOW *, int));
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int curs_set(int visibility);
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int napms(int ms);
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int draino(int ms);
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int resetterm(void);
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int fixterm(void);
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int saveterm(void);
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Description:
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def_prog_mode() and def_shell_mode() save the current terminal
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modes as the "program" (in curses) or "shell" (not in curses)
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state for use by the reset_prog_mode() and reset_shell_mode()
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functions. This is done automatically by initscr().
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reset_prog_mode() and reset_shell_mode() restore the terminal to
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"program" (in curses) or "shell" (not in curses) state. These
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are done automatically by endwin() and doupdate() after an
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endwin(), so they would normally not be called before these
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functions.
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savetty() and resetty() save and restore the state of the
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terminal modes. savetty() saves the current state in a buffer,
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and resetty() restores the state to what it was at the last call
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to savetty().
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curs_set() alters the appearance of the cursor. A visibility of
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0 makes it disappear; 1 makes it appear "normal" (usually an
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underline) and 2 makes it "highly visible" (usually a block).
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ripoffline() reduces the size of stdscr by one line. If the
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"line" parameter is positive, the line is removed from the top
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of the screen; if negative, from the bottom. Up to 5 lines can
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be ripped off stdscr by calling ripoffline() repeatedly. The
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function argument, init, is called from within initscr() or
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newterm(), so ripoffline() must be called before either of these
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functions. The init function receives a pointer to a one-line
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WINDOW, and the width of the window. Calling ripoffline() with a
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NULL init function pointer is an error.
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napms() suspends the program for the specified number of
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milliseconds. draino() is an archaic equivalent.
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resetterm(), fixterm() and saveterm() are archaic equivalents
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for reset_shell_mode(), reset_prog_mode() and def_prog_mode(),
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respectively.
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Return Value:
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All functions return OK on success and ERR on error, except
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curs_set(), which returns the previous visibility.
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Portability X/Open BSD SYS V
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def_prog_mode Y Y Y
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def_shell_mode Y Y Y
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reset_prog_mode Y Y Y
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reset_shell_mode Y Y Y
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resetty Y Y Y
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savetty Y Y Y
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ripoffline Y - 3.0
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curs_set Y - 3.0
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napms Y Y Y
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draino -
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resetterm -
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fixterm -
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saveterm -
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**man-end****************************************************************/
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#include <string.h>
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RIPPEDOFFLINE linesripped[5];
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char linesrippedoff = 0;
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static struct cttyset
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{
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bool been_set;
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SCREEN saved;
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} ctty[3];
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enum { PDC_SH_TTY, PDC_PR_TTY, PDC_SAVE_TTY };
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static void _save_mode(int i)
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{
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ctty[i].been_set = TRUE;
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memcpy(&(ctty[i].saved), SP, sizeof(SCREEN));
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PDC_save_screen_mode(i);
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}
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static int _restore_mode(int i)
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{
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if (ctty[i].been_set == TRUE)
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{
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memcpy(SP, &(ctty[i].saved), sizeof(SCREEN));
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if (ctty[i].saved.raw_out)
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raw();
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PDC_restore_screen_mode(i);
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if ((LINES != ctty[i].saved.lines) ||
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(COLS != ctty[i].saved.cols))
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resize_term(ctty[i].saved.lines, ctty[i].saved.cols);
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PDC_curs_set(ctty[i].saved.visibility);
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PDC_gotoyx(ctty[i].saved.cursrow, ctty[i].saved.curscol);
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}
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return ctty[i].been_set ? OK : ERR;
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}
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int def_prog_mode(void)
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{
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PDC_LOG(("def_prog_mode() - called\n"));
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_save_mode(PDC_PR_TTY);
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return OK;
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}
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int def_shell_mode(void)
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{
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PDC_LOG(("def_shell_mode() - called\n"));
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_save_mode(PDC_SH_TTY);
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return OK;
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}
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int reset_prog_mode(void)
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{
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PDC_LOG(("reset_prog_mode() - called\n"));
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_restore_mode(PDC_PR_TTY);
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PDC_reset_prog_mode();
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return OK;
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}
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int reset_shell_mode(void)
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{
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PDC_LOG(("reset_shell_mode() - called\n"));
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_restore_mode(PDC_SH_TTY);
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PDC_reset_shell_mode();
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return OK;
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}
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int resetty(void)
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{
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PDC_LOG(("resetty() - called\n"));
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return _restore_mode(PDC_SAVE_TTY);
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}
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int savetty(void)
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{
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PDC_LOG(("savetty() - called\n"));
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_save_mode(PDC_SAVE_TTY);
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return OK;
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}
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int curs_set(int visibility)
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{
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int ret_vis;
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PDC_LOG(("curs_set() - called: visibility=%d\n", visibility));
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if ((visibility < 0) || (visibility > 2))
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return ERR;
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ret_vis = PDC_curs_set(visibility);
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/* If the cursor is changing from invisible to visible, update
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its position */
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if (visibility && !ret_vis)
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PDC_gotoyx(SP->cursrow, SP->curscol);
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return ret_vis;
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}
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int napms(int ms)
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{
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PDC_LOG(("napms() - called: ms=%d\n", ms));
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if (ms)
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PDC_napms(ms);
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return OK;
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}
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int ripoffline(int line, int (*init)(WINDOW *, int))
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{
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PDC_LOG(("ripoffline() - called: line=%d\n", line));
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if (linesrippedoff < 5 && line && init)
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{
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linesripped[(int)linesrippedoff].line = line;
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linesripped[(int)linesrippedoff++].init = init;
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return OK;
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}
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return ERR;
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}
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int draino(int ms)
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{
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PDC_LOG(("draino() - called\n"));
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return napms(ms);
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}
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int resetterm(void)
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{
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PDC_LOG(("resetterm() - called\n"));
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return reset_shell_mode();
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}
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int fixterm(void)
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{
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PDC_LOG(("fixterm() - called\n"));
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return reset_prog_mode();
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}
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int saveterm(void)
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{
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PDC_LOG(("saveterm() - called\n"));
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return def_prog_mode();
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}
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