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curses.c
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curses.c
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/* -*- C -*-
* $Id$
*
* ext/curses/curses.c
*
* by MAEDA Shugo (ender@pic-internet.or.jp)
* modified by Yukihiro Matsumoto (matz@netlab.co.jp),
* Toki Yoshinori,
* Hitoshi Takahashi,
* and Takaaki Tateishi (ttate@kt.jaist.ac.jp)
*
* maintainers:
* - Takaaki Tateishi (ttate@kt.jaist.ac.jp)
*
* doumentation:
* - Vincent Batts (vbatts@hashbangbash.com)
*/
#include "ruby.h"
#include "ruby/io.h"
#if defined(HAVE_NCURSES_H)
# include <ncurses.h>
#elif defined(HAVE_NCURSES_CURSES_H)
# include <ncurses/curses.h>
#elif defined(HAVE_CURSES_COLR_CURSES_H)
# ifdef HAVE_STDARG_PROTOTYPES
# include <stdarg.h>
# else
# include <varargs.h>
# endif
# include <curses_colr/curses.h>
#else
# include <curses.h>
# if defined(__bsdi__) || defined(__NetBSD__) || defined(__APPLE__)
# if !defined(_maxx)
# define _maxx maxx
# endif
# if !defined(_maxy)
# define _maxy maxy
# endif
# if !defined(_begx)
# define _begx begx
# endif
# if !defined(_begy)
# define _begy begy
# endif
# endif
#endif
#ifdef HAVE_INIT_COLOR
# define USE_COLOR 1
#endif
/* supports only ncurses mouse routines */
#ifdef NCURSES_MOUSE_VERSION
# define USE_MOUSE 1
#endif
#define NUM2CH NUM2CHR
#define CH2FIX CHR2FIX
static VALUE mCurses;
static VALUE mKey;
static VALUE cWindow;
#ifdef USE_MOUSE
static VALUE cMouseEvent;
#endif
static VALUE rb_stdscr;
struct windata {
WINDOW *window;
};
static VALUE window_attroff(VALUE obj, VALUE attrs);
static VALUE window_attron(VALUE obj, VALUE attrs);
static VALUE window_attrset(VALUE obj, VALUE attrs);
static void
no_window(void)
{
rb_raise(rb_eRuntimeError, "already closed window");
}
#define GetWINDOW(obj, winp) do {\
if (!OBJ_TAINTED(obj) && rb_safe_level() >= 4)\
rb_raise(rb_eSecurityError, "Insecure: operation on untainted window");\
Data_Get_Struct((obj), struct windata, (winp));\
if ((winp)->window == 0) no_window();\
} while (0)
static void
free_window(struct windata *winp)
{
if (winp->window && winp->window != stdscr) delwin(winp->window);
winp->window = 0;
xfree(winp);
}
static VALUE
prep_window(VALUE class, WINDOW *window)
{
VALUE obj;
struct windata *winp;
if (window == NULL) {
rb_raise(rb_eRuntimeError, "failed to create window");
}
obj = rb_obj_alloc(class);
Data_Get_Struct(obj, struct windata, winp);
winp->window = window;
return obj;
}
/*-------------------------- module Curses --------------------------*/
/*
* Document-method: Curses.init_screen
*
* Initialize a standard screen
*
* see also Curses.stdscr
*/
static VALUE
curses_init_screen(void)
{
rb_secure(4);
if (rb_stdscr) return rb_stdscr;
initscr();
if (stdscr == 0) {
rb_raise(rb_eRuntimeError, "can't initialize curses");
}
clear();
rb_stdscr = prep_window(cWindow, stdscr);
return rb_stdscr;
}
/*
* Document-method: Curses.stdscr
*
* The Standard Screen.
*
* Upon initializing curses, a default window called stdscr,
* which is the size of the terminal screen, is created.
*
* Many curses functions use this window.
*/
#define curses_stdscr curses_init_screen
/*
* Document-method: Curses.close_screen
*
* A program should always call Curses.close_screen before exiting or
* escaping from curses mode temporarily. This routine
* restores tty modes, moves the cursor to the lower
* left-hand corner of the screen and resets the terminal
* into the proper non-visual mode.
*
* Calling Curses.refresh or Curses.doupdate after a temporary
* escape causes the program to resume visual mode.
*
*/
static VALUE
curses_close_screen(void)
{
curses_stdscr();
#ifdef HAVE_ISENDWIN
if (!isendwin())
#endif
endwin();
rb_stdscr = 0;
return Qnil;
}
/*
* This is no runtime method,
* but a function called before the proc ends
*
* Similar to Curses.close_screen, except that it also
* garbage collects/unregisters the Curses.stdscr
*/
static void
curses_finalize(VALUE dummy)
{
if (stdscr
#ifdef HAVE_ISENDWIN
&& !isendwin()
#endif
)
endwin();
rb_stdscr = 0;
rb_gc_unregister_address(&rb_stdscr);
}
#ifdef HAVE_ISENDWIN
/*
* Document-method: Curses.closed?
*
* Returns +true+ if the window/screen has been closed,
* without any subsequent Curses.refresh calls,
* returns +false+ otherwise.
*/
static VALUE
curses_closed(void)
{
curses_stdscr();
if (isendwin()) {
return Qtrue;
}
return Qfalse;
}
#else
#define curses_closed rb_f_notimplement
#endif
/*
* Document-method: Curses.clear
*
* Clears every position on the screen completely,
* so that a subsequent call by Curses.refresh for the screen/window
* will be repainted from scratch.
*/
static VALUE
curses_clear(VALUE obj)
{
curses_stdscr();
wclear(stdscr);
return Qnil;
}
/*
* Document-method: Curses.clrtoeol
*
* Clears to the end of line, that the cursor is currently on.
*/
static VALUE
curses_clrtoeol(void)
{
curses_stdscr();
clrtoeol();
return Qnil;
}
/*
* Document-method: Curses.refresh
*
* Refreshes the windows and lines.
*
*/
static VALUE
curses_refresh(VALUE obj)
{
curses_stdscr();
refresh();
return Qnil;
}
/*
* Document-method: Curses.doupdate
*
* Refreshes the windows and lines.
*
* Curses.doupdate allows multiple updates with
* more efficiency than Curses.refresh alone.
*/
static VALUE
curses_doupdate(VALUE obj)
{
curses_stdscr();
#ifdef HAVE_DOUPDATE
doupdate();
#else
refresh();
#endif
return Qnil;
}
/*
* Document-method: Curses.echo
*
* Enables characters typed by the user
* to be echoed by Curses.getch as they are typed.
*/
static VALUE
curses_echo(VALUE obj)
{
curses_stdscr();
echo();
return Qnil;
}
/*
* Document-method: Curses.noecho
*
* Disables characters typed by the user
* to be echoed by Curses.getch as they are typed.
*/
static VALUE
curses_noecho(VALUE obj)
{
curses_stdscr();
noecho();
return Qnil;
}
/*
* Document-method: Curses.raw
*
* Put the terminal into raw mode.
*
* Raw mode is similar to Curses.cbreak mode, in that characters typed
* are immediately passed through to the user program.
*
* The differences are that in raw mode, the interrupt, quit,
* suspend, and flow control characters are all passed through
* uninterpreted, instead of generating a signal. The behavior
* of the BREAK key depends on other bits in the tty driver
* that are not set by curses.
*/
static VALUE
curses_raw(VALUE obj)
{
curses_stdscr();
raw();
return Qnil;
}
/*
* Document-method: Curses.noraw
*
* Put the terminal out of raw mode.
*
* see Curses.raw for more detail
*/
static VALUE
curses_noraw(VALUE obj)
{
curses_stdscr();
noraw();
return Qnil;
}
/*
* Document-method: Curses.cbreak
*
* Put the terminal into cbreak mode.
*
* Normally, the tty driver buffers typed characters until
* a newline or carriage return is typed. The Curses.cbreak
* routine disables line buffering and erase/kill
* character-processing (interrupt and flow control characters
* are unaffected), making characters typed by the user
* immediately available to the program.
*
* The Curses.nocbreak routine returns the terminal to normal (cooked) mode.
*
* Initially the terminal may or may not be in cbreak mode,
* as the mode is inherited; therefore, a program should
* call Curses.cbreak or Curses.nocbreak explicitly.
* Most interactive programs using curses set the cbreak mode.
* Note that Curses.cbreak overrides Curses.raw.
*
* see also Curses.raw
*/
static VALUE
curses_cbreak(VALUE obj)
{
curses_stdscr();
cbreak();
return Qnil;
}
/*
* Document-method: Curses.nocbreak
*
* Put the terminal into normal mode (out of cbreak mode).
*
* See Curses.cbreak for more detail.
*/
static VALUE
curses_nocbreak(VALUE obj)
{
curses_stdscr();
nocbreak();
return Qnil;
}
/*
* Document-method: Curses.nl
*
* Enable the underlying display device to translate
* the return key into newline on input, and whether it
* translates newline into return and line-feed on output
* (in either case, the call Curses.addch('\n') does the
* equivalent of return and line feed on the virtual screen).
*
* Initially, these translations do occur. If you disable
* them using Curses.nonl, curses will be able to make better use
* of the line-feed capability, resulting in faster cursor
* motion. Also, curses will then be able to detect the return key.
*/
static VALUE
curses_nl(VALUE obj)
{
curses_stdscr();
nl();
return Qnil;
}
/*
* Document-method: Curses.nl
*
* Disable the underlying display device to translate
* the return key into newline on input
*
* See Curses.nl for more detail
*/
static VALUE
curses_nonl(VALUE obj)
{
curses_stdscr();
nonl();
return Qnil;
}
/*
* Document-method: Curses.beep
*
* Sounds an audible alarm on the terminal, if possible;
* otherwise it flashes the screen (visual bell).
*
* see also Curses.flash
*/
static VALUE
curses_beep(VALUE obj)
{
#ifdef HAVE_BEEP
curses_stdscr();
beep();
#endif
return Qnil;
}
/*
* Document-method: Curses.flash
*
* Flashs the screen, for visual alarm on the terminal, if possible;
* otherwise it sounds the alert.
*
* see also Curses.beep
*/
static VALUE
curses_flash(VALUE obj)
{
#ifdef HAVE_FLASH
curses_stdscr();
flash();
#endif
return Qnil;
}
static int
curses_char(VALUE c)
{
if (FIXNUM_P(c)) {
return NUM2INT(c);
}
else {
int cc;
StringValue(c);
if (RSTRING_LEN(c) == 0 || RSTRING_LEN(c) > 1) {
rb_raise(rb_eArgError, "string not corresponding a character");
}
cc = RSTRING_PTR(c)[0];
if (cc > 0x7f) {
rb_raise(rb_eArgError, "no multibyte string supported (yet)");
}
return cc;
}
}
#ifdef HAVE_UNGETCH
/*
* Document-method: Curses.ungetch
* call-seq: ungetch(ch)
*
* Places +ch+ back onto the input queue to be returned by
* the next call to Curses.getch.
*
* There is just one input queue for all windows.
*/
static VALUE
curses_ungetch(VALUE obj, VALUE ch)
{
int c = curses_char(ch);
curses_stdscr();
ungetch(c);
return Qnil;
}
#else
#define curses_ungetch rb_f_notimplement
#endif
/*
* Document-method: Curses.setpos
* call-seq: setpos(y, x)
*
* A setter for the position of the cursor,
* using coordinates +x+ and +y+
*
*/
static VALUE
curses_setpos(VALUE obj, VALUE y, VALUE x)
{
curses_stdscr();
move(NUM2INT(y), NUM2INT(x));
return Qnil;
}
/*
* Document-method: Curses.standout
*
* Enables the best highlighting mode of the terminal.
*
* This is equivalent to Curses:Window.attron(A_STANDOUT)
*
* see also Curses::Window.attrset additional information
*/
static VALUE
curses_standout(VALUE obj)
{
curses_stdscr();
standout();
return Qnil;
}
/*
* Document-method: Curses.standend
*
* Enables the Normal display (no highlight)
*
* This is equivalent to Curses.attron(A_NORMAL)
*
* see also Curses::Window.attrset for additional information.
*/
static VALUE
curses_standend(VALUE obj)
{
curses_stdscr();
standend();
return Qnil;
}
/*
* Document-method: Curses.inch
*
* Returns the character at the current position.
*/
static VALUE
curses_inch(VALUE obj)
{
curses_stdscr();
return CH2FIX(inch());
}
/*
* Document-method: Curses.addch
* call-seq: addch(ch)
*
* Add a character +ch+, with attributes, then advance the cursor.
*
* see also the system manual for curs_addch(3)
*/
static VALUE
curses_addch(VALUE obj, VALUE ch)
{
curses_stdscr();
addch(NUM2CH(ch));
return Qnil;
}
/*
* Document-method: Curses.insch
* call-seq: insch(ch)
*
* Insert a character +ch+, before the cursor.
*
*/
static VALUE
curses_insch(VALUE obj, VALUE ch)
{
curses_stdscr();
insch(NUM2CH(ch));
return Qnil;
}
/*
* Document-method: Curses.addstr
* call-seq: addstr(str)
*
* add a string of characters +str+, to the window and advance cursor
*
*/
static VALUE
curses_addstr(VALUE obj, VALUE str)
{
StringValue(str);
str = rb_str_export_locale(str);
curses_stdscr();
if (!NIL_P(str)) {
addstr(StringValueCStr(str));
}
return Qnil;
}
static VALUE
getch_func(void *arg)
{
int *ip = (int *)arg;
*ip = getch();
return Qnil;
}
/*
* Document-method: Curses.getch
*
* Read and returns a character from the window.
*
* See Curses::Key to all the function KEY_* available
*
*/
static VALUE
curses_getch(VALUE obj)
{
int c;
curses_stdscr();
rb_thread_blocking_region(getch_func, (void *)&c, RUBY_UBF_IO, 0);
if (c == EOF) return Qnil;
if (rb_isprint(c)) {
char ch = (char)c;
return rb_locale_str_new(&ch, 1);
}
return UINT2NUM(c);
}
/* This should be big enough.. I hope */
#define GETSTR_BUF_SIZE 1024
static VALUE
getstr_func(void *arg)
{
char *rtn = (char *)arg;
#if defined(HAVE_GETNSTR)
getnstr(rtn,GETSTR_BUF_SIZE-1);
#else
getstr(rtn);
#endif
return Qnil;
}
/*
* Document-method: Curses.getstr
*
* This is equivalent to a series f Curses::Window.getch calls
*
*/
static VALUE
curses_getstr(VALUE obj)
{
char rtn[GETSTR_BUF_SIZE];
curses_stdscr();
rb_thread_blocking_region(getstr_func, (void *)rtn, RUBY_UBF_IO, 0);
return rb_locale_str_new_cstr(rtn);
}
/*
* Document-method: Curses.delch
*
* Delete the character under the cursor
*
*/
static VALUE
curses_delch(VALUE obj)
{
curses_stdscr();
delch();
return Qnil;
}
/*
* Document-method: Curses.deleteln
*
* Delete the line under the cursor.
*
*/
static VALUE
curses_deleteln(VALUE obj)
{
curses_stdscr();
#if defined(HAVE_DELETELN) || defined(deleteln)
deleteln();
#endif
return Qnil;
}
/*
* Document-method: Curses.insertln
*
* Inserts a line above the cursor, and the bottom line is lost
*
*/
static VALUE
curses_insertln(VALUE obj)
{
curses_stdscr();
#if defined(HAVE_INSERTLN) || defined(insertln)
insertln();
#endif
return Qnil;
}
/*
* Document-method: Curses.keyname
* call-seq: keyname(c)
*
* Returns the character string corresponding to key +c+
*/
static VALUE
curses_keyname(VALUE obj, VALUE c)
{
#ifdef HAVE_KEYNAME
int cc = curses_char(c);
const char *name;
curses_stdscr();
name = keyname(cc);
if (name) {
return rb_str_new_cstr(name);
}
else {
return Qnil;
}
#else
return Qnil;
#endif
}
/*
* Document-method: Curses.lines
*
* Returns the number of lines on the screen
*/
static VALUE
curses_lines(void)
{
return INT2FIX(LINES);
}
/*
* Document-method: Curses.cols
*
* Returns the number of columns on the screen
*/
static VALUE
curses_cols(void)
{
return INT2FIX(COLS);
}
/*
* Document-method: Curses.curs_set
* call-seq: curs_set(visibility)
*
* Sets Cursor Visibility.
* 0: invisible
* 1: visible
* 2: very visible
*/
static VALUE
curses_curs_set(VALUE obj, VALUE visibility)
{
#ifdef HAVE_CURS_SET
int n;
curses_stdscr();
return (n = curs_set(NUM2INT(visibility)) != ERR) ? INT2FIX(n) : Qnil;
#else
return Qnil;
#endif
}
/*
* Document-method: Curses.scrl
* call-seq: scrl(num)
*
* Scrolls the current window Fixnum +num+ lines.
* The current cursor position is not changed.
*
* For positive +num+, it scrolls up.
*
* For negative +num+, it scrolls down.
*
*/
static VALUE
curses_scrl(VALUE obj, VALUE n)
{
/* may have to raise exception on ERR */
#ifdef HAVE_SCRL
curses_stdscr();
return (scrl(NUM2INT(n)) == OK) ? Qtrue : Qfalse;
#else
return Qfalse;
#endif
}
/*
* Document-method: Curses.setscrreg
*
* call-seq:
* setscrreg(top, bottom)
*
* Set a software scrolling region in a window.
* +top+ and +bottom+ are lines numbers of the margin.
*
* If this option and Curses.scrollok are enabled, an attempt to move off
* the bottom margin line causes all lines in the scrolling region
* to scroll one line in the direction of the first line.
* Only the text of the window is scrolled.
*
*/
static VALUE
curses_setscrreg(VALUE obj, VALUE top, VALUE bottom)
{
/* may have to raise exception on ERR */
#ifdef HAVE_SETSCRREG
curses_stdscr();
return (setscrreg(NUM2INT(top), NUM2INT(bottom)) == OK) ? Qtrue : Qfalse;
#else
return Qfalse;
#endif
}
/*
* Document-method: Curses.attroff
* call-seq: attroff(attrs)
*
* Turns on the named attributes +attrs+ without affecting any others.
*
* See also Curses::Window.attrset for additional information.
*/
static VALUE
curses_attroff(VALUE obj, VALUE attrs)
{
curses_stdscr();
return window_attroff(rb_stdscr,attrs);
/* return INT2FIX(attroff(NUM2INT(attrs))); */
}
/*
* Document-method: Curses.attron
* call-seq: attron(attrs)
*
* Turns off the named attributes +attrs+
* without turning any other attributes on or off.
*
* See also Curses::Window.attrset for additional information.
*/
static VALUE
curses_attron(VALUE obj, VALUE attrs)
{
curses_stdscr();
return window_attron(rb_stdscr,attrs);
/* return INT2FIX(attroff(NUM2INT(attrs))); */
}
/*
* Document-method: Curses.attrset
* call-seq: attrset(attrs)
*
* Sets the current attributes of the given window to +attrs+.
*
* see also Curses::Window.attrset
*
*/
static VALUE
curses_attrset(VALUE obj, VALUE attrs)
{
curses_stdscr();
return window_attrset(rb_stdscr,attrs);
/* return INT2FIX(attroff(NUM2INT(attrs))); */
}
/*
* Document-method: Curses.bkgdset
* call-seq: bkgdset(ch)
*
* Manipulate the background of the named window
* with character Integer +ch+
*
* The background becomes a property of the character
* and moves with the character through any scrolling
* and insert/delete line/character operations.
*
* see also the system manual for curs_bkgd(3)
*/
static VALUE
curses_bkgdset(VALUE obj, VALUE ch)
{
#ifdef HAVE_BKGDSET
curses_stdscr();
bkgdset(NUM2CH(ch));
#endif
return Qnil;
}
/*
* call-seq: bkgd(ch)
*
* Window background manipulation routines.
*
* Set the background property of the current
* and then apply the character Integer +ch+ setting
* to every character position in that window.
*
* see also the system manual for curs_bkgd(3)
*/
static VALUE
curses_bkgd(VALUE obj, VALUE ch)
{
#ifdef HAVE_BKGD
curses_stdscr();
return (bkgd(NUM2CH(ch)) == OK) ? Qtrue : Qfalse;
#else
return Qfalse;
#endif
}
#if defined(HAVE_USE_DEFAULT_COLORS)
/*
* tells the curses library to use terminal's default colors.
*
* see also the system manual for default_colors(3)
*/
static VALUE
curses_use_default_colors(VALUE obj)
{
curses_stdscr();
use_default_colors();
return Qnil;
}
#else
#define curses_use_default_colors rb_f_notimplement
#endif
#if defined(HAVE_TABSIZE)
/*
* Document-method: Curses.TABSIZE=
* call-seq: TABSIZE=(value)
*
* Sets the TABSIZE to Integer +value+
*/
static VALUE
curses_tabsize_set(VALUE obj, VALUE val)
{
TABSIZE = NUM2INT(val);
return INT2NUM(TABSIZE);
}
#else
#define curses_tabsize_set rb_f_notimplement
#endif
#if defined(HAVE_TABSIZE)
/*
* Returns the number of positions in a tab.
*/
static VALUE
curses_tabsize_get(VALUE ojb)
{
return INT2NUM(TABSIZE);
}
#else
#define curses_tabsize_get rb_f_notimplement
#endif
#if defined(HAVE_ESCDELAY)
/*
* call-seq: Curses.ESCDELAY=(value)
*
* Sets the ESCDELAY to Integer +value+
*/
static VALUE
curses_escdelay_set(VALUE obj, VALUE val)
{
ESCDELAY = NUM2INT(val);