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/*
* ux_screen.c
*
* Unix interface, screen manipulation
*
*/
#define __UNIX_PORT_FILE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef USE_NCURSES_H
#include <ncurses.h>
#else
#include <curses.h>
#endif
#include "frotz.h"
#include "ux_frotz.h"
/*
* os_erase_area
*
* Fill a rectangular area of the screen with the current background
* colour. Top left coordinates are (1,1). The cursor does not move.
*
*/
void os_erase_area (int top, int left, int bottom, int right)
{
int y, x, i, j;
int saved_style;
/* Catch the most common situation and do things the easy way */
if ((top == 1) && (bottom == h_screen_rows) &&
(left == 1) && (right == h_screen_cols))
erase();
else {
/* Sigh... */
getyx(stdscr, y, x);
saved_style = current_text_style;
os_set_text_style(0);
top--; left--; bottom--; right--;
for (i = top; i <= bottom; i++) {
move(i, left);
for (j = left; j <= right; j++)
addch(' ');
}
os_set_text_style(saved_style);
move(y, x);
}
refresh();
}/* os_erase_area */
/*
* os_scroll_area
*
* Scroll a rectangular area of the screen up (units > 0) or down
* (units < 0) and fill the empty space with the current background
* colour. Top left coordinates are (1,1). The cursor stays put.
*
*/
static int old_scroll_top = 0;
static int old_scroll_bottom = 0;
void os_scroll_area (int top, int left, int bottom, int right, int units)
{
#ifdef COLOR_SUPPORT
int y, x, i;
int saved_style;
#endif
if (units != 1) os_fatal("Can't Happen (os_scroll_area)"); /* FIXME */
if (!((old_scroll_top == top) && (old_scroll_bottom == bottom))) {
old_scroll_top = top; old_scroll_bottom = bottom;
setscrreg(--top, --bottom);
}
scrollok(stdscr, TRUE);
scroll(stdscr);
scrollok(stdscr, FALSE);
#ifdef COLOR_SUPPORT
if (h_flags & COLOUR_FLAG) {
getyx(stdscr, y, x);
move(old_scroll_bottom, 0);
saved_style = current_text_style;
os_set_text_style(0);
for (i = 0; i <= right; i++) addch(' ');
os_set_text_style(saved_style);
move(y, x);
}
#endif
}/* os_scroll_area */
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