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/****************************************************************************
 * Copyright (c) 2006-2010,2012 Free Software Foundation, Inc.              *
 *                                                                          *
 * Permission is hereby granted, free of charge, to any person obtaining a  *
 * copy of this software and associated documentation files (the            *
 * "Software"), to deal in the Software without restriction, including      *
 * without limitation the rights to use, copy, modify, merge, publish,      *
 * distribute, distribute with modifications, sublicense, and/or sell       *
 * copies of the Software, and to permit persons to whom the Software is    *
 * furnished to do so, subject to the following conditions:                 *
 *                                                                          *
 * The above copyright notice and this permission notice shall be included  *
 * in all copies or substantial portions of the Software.                   *
 *                                                                          *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
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 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
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 * holders shall not be used in advertising or otherwise to promote the     *
 * sale, use or other dealings in this Software without prior written       *
 * authorization.                                                           *
 ****************************************************************************/
/*
 * $Id: chgat.c,v 1.12 2012/11/18 01:55:35 tom Exp $
 *
 * test-driver for chgat/wchgat/mvchgat/mvwchgat
 */

#include <test.priv.h>

#if HAVE_CHGAT

#define SHOW(n) ((n) == ERR ? "ERR" : "OK")
#define COLOR_DEFAULT (-1)

#if defined(NCURSES_VERSION_PATCH) && NCURSES_VERSION_PATCH < 20060715
#define touch_if_needed(win, row) touchline(win, row, 1)
#else
#define touch_if_needed(win, row)	/* nothing */
#endif

typedef struct {
    unsigned c;
    unsigned v;
    short pair;
    unsigned attr;
    int count;
    int ch;
    const char *c_msg;
    const char *v_msg;
    int y_val;
    int x_val;
    int y_beg, x_beg;
    int y_max, x_max;
} STATUS;

static const char *
color_params(unsigned state, short *pair)
{
    /* *INDENT-OFF* */
    static struct {
	short pair;
	short fg, bg;
	const char *msg;
    } table[] = {
	{ 0, COLOR_DEFAULT, COLOR_DEFAULT, "default" },
	{ 1, COLOR_RED,     COLOR_BLACK,   "red/black" },
	{ 2, COLOR_WHITE,   COLOR_BLUE,    "white/blue" },
    };
    /* *INDENT-ON* */

    static bool first = TRUE;
    const char *result = 0;

    if (has_colors()) {
	if (first) {
	    unsigned n;

	    start_color();
	    for (n = 0; n < SIZEOF(table); ++n) {
		init_pair(table[n].pair, table[n].fg, table[n].bg);
	    }
	}
	if (state < SIZEOF(table)) {
	    *pair = table[state].pair;
	    result = table[state].msg;
	}
    }
    return result;
}

static const char *
video_params(unsigned state, unsigned *attr)
{
    /* *INDENT-OFF* */
    static struct {
	unsigned attr;
	const char *msg;
    } table[] = {
	{ A_NORMAL,	"normal" },
	{ A_BOLD,	"bold" },
	{ A_REVERSE,	"reverse" },
	{ A_UNDERLINE,	"underline" },
	{ A_BLINK, 	"blink" },
    };
    /* *INDENT-ON* */

    const char *result = 0;

    if (state < SIZEOF(table)) {
	*attr = table[state].attr;
	result = table[state].msg;
    }
    return result;
}

/* fill the window with a test-pattern */
static void
fill_window(WINDOW *win)
{
    int y, x;
    int y0 = -1, x0 = -1;

    getyx(win, y, x);
    wmove(win, 0, 0);
    while (waddstr(win, "0123456789 abcdefghijklmnopqrstuvwxyz ") != ERR) {
	int y1, x1;
	getyx(win, y1, x1);
	if (y1 == y0 && x1 == x0)
	    break;
	x0 = x1;
	y0 = y1;
    }
    wmove(win, y, x);
}

static void
show_status(WINDOW *win, STATUS * sp)
{
    int y, x;

    getyx(win, y, x);
    wmove(win, 0, 0);
    wprintw(win, "Count %d", sp->count);
    if (sp->v_msg != 0)
	wprintw(win, " Video %s", sp->v_msg);
    if (sp->c_msg != 0)
	wprintw(win, " Color %s", sp->c_msg);
    wclrtoeol(win);
    wmove(win, y, x);
}

static void
do_subwindow(WINDOW *win, STATUS * sp, void func(WINDOW *))
{
    WINDOW *win1 = newwin(sp->y_max - 2, sp->x_max - 2,
			  sp->y_beg + 1, sp->x_beg + 1);

    if (win1 != 0 && sp->y_max > 4 && sp->x_max > 4) {
	WINDOW *win2 = derwin(win1, sp->y_max - 4, sp->x_max - 4, 1, 1);

	if (win2 != 0) {
	    box(win1, 0, 0);
	    wrefresh(win1);
	    func(win2);

	    delwin(win2);
	} else {
	    beep();
	}
	delwin(win1);
	touchwin(win);
    } else {
	if (win1 != 0)
	    delwin(win1);
	beep();
    }
}

static void
init_status(WINDOW *win, STATUS * sp)
{
    memset(sp, 0, sizeof(*sp));
    sp->c = 99;
    sp->v = 99;
    sp->ch = ' ';

    keypad(win, TRUE);
    fill_window(win);

    getbegyx(win, sp->y_beg, sp->x_beg);
    getmaxyx(win, sp->y_max, sp->x_max);
}

static void
show_help(WINDOW *win)
{
    static const char *table[] =
    {
	"Basic commands:"
	,"Use h/j/k/l or arrow keys to move the cursor."
	,"Set the count parameter for chgat by entering digits 0-9."
	,""
	,"Other commands:"
	,"space toggles through the set of video attributes and colors."
	,"t     touches (forces repaint) of the current line."
	,".     calls *chgat at the current position with the given count."
	,",     calls *chgat at the window beginning with the given count."
	,"=     resets count to zero."
	,"-     negates count."
	,"?     shows this help-window"
	,""
	,""
    };

    int y_max, x_max;
    int row;

    getmaxyx(win, y_max, x_max);
    for (row = 0; row < (int) SIZEOF(table) && row < y_max; ++row) {
	MvWPrintw(win, row, 0, "%.*s", x_max, table[row]);
    }
    while (wgetch(win) != 'q')
	beep();
}

static void
update_status(WINDOW *win, STATUS * sp)
{
    switch (sp->ch) {
    case ' ':			/* next test-iteration */
	if (has_colors()) {
	    if ((sp->c_msg = color_params(++(sp->c), &(sp->pair))) == 0) {
		sp->c_msg = color_params(sp->c = 0, &(sp->pair));
		if ((sp->v_msg = video_params(++(sp->v), &(sp->attr))) == 0) {
		    sp->v_msg = video_params(sp->v = 0, &(sp->attr));
		}
	    }
	} else {
	    if ((sp->v_msg = video_params(++(sp->v), &(sp->attr))) == 0) {
		sp->v_msg = video_params(sp->v = 0, &(sp->attr));
	    }
	}
	sp->count = 0;
	show_status(win, sp);
	break;
    case KEY_LEFT:
    case 'h':
	if (sp->x_val > 0)
	    wmove(win, sp->y_val, --(sp->x_val));
	break;
    case KEY_DOWN:
    case 'j':
	if (sp->y_val < sp->y_max)
	    wmove(win, ++(sp->y_val), sp->x_val);
	break;
    case KEY_UP:
    case 'k':
	if (sp->y_val > 0)
	    wmove(win, --(sp->y_val), sp->x_val);
	break;
    case KEY_RIGHT:
    case 'l':
	if (sp->x_val < sp->x_max)
	    wmove(win, sp->y_val, ++(sp->x_val));
	break;
    case 't':
	touchline(win, sp->y_val, 1);
	break;
    case '=':
	sp->count = 0;
	show_status(win, sp);
	break;
    case '-':
	sp->count = -(sp->count);
	show_status(win, sp);
	break;
    case '?':
	do_subwindow(win, sp, show_help);
	break;
    default:
	if (isdigit(sp->ch)) {
	    sp->count = (sp->count * 10) + (sp->ch - '0');
	    show_status(win, sp);
	} else {
	    beep();
	}
	break;
    }
}

static void
test_wchgat(WINDOW *win)
{
    STATUS st;

    init_status(win, &st);

    do {
	switch (st.ch) {
	case '.':		/* change from current position */
	    wchgat(win, st.count, st.attr, st.pair, (void *) 0);
	    touch_if_needed(win, st.y_val);
	    break;
	case ',':		/* change from beginning of window */
	    mvwchgat(win, 0, 0, st.count, st.attr, st.pair, (void *) 0);
	    touch_if_needed(win, 0);
	    wmove(win, st.y_val, st.x_val);
	    break;
	case 'w':
	    do_subwindow(win, &st, test_wchgat);
	    break;
	case 'q':
	    return;
	default:
	    update_status(win, &st);
	    break;
	}
    } while ((st.ch = wgetch(win)) != ERR);
}

static void
test_chgat(void)
{
    STATUS st;

    init_status(stdscr, &st);

    do {
	switch (st.ch) {
	case '.':		/* change from current position */
	    chgat(st.count, st.attr, st.pair, (void *) 0);
	    touch_if_needed(stdscr, st.y_val);
	    break;
	case ',':		/* change from beginning of window */
	    mvchgat(0, 0, st.count, st.attr, st.pair, (void *) 0);
	    touch_if_needed(stdscr, 0);
	    move(st.y_val, st.x_val);
	    break;
	case 'w':
	    do_subwindow(stdscr, &st, test_wchgat);
	    break;
	case 'q':
	    return;
	default:
	    update_status(stdscr, &st);
	    break;
	}
    } while ((st.ch = getch()) != ERR);
}

int
main(int argc GCC_UNUSED, char *argv[]GCC_UNUSED)
{
    initscr();
    cbreak();
    noecho();

    test_chgat();
    endwin();

    ExitProgram(EXIT_SUCCESS);
}

#else
int
main(void)
{
    printf("This program requires the curses chgat function\n");
    ExitProgram(EXIT_FAILURE);
}
#endif
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