catpoint

commit f79c989fd7b8ab805931f8b6e50240d06d24fca7
parent 65ce53868833de66b4270e56c3a3e31b4f0a4615
Author: FRIGN <dev@frign.de>
Date:   Fri, 11 Jul 2014 13:54:19 +0200

Get rid of ncurses

What catpoint needs can easily be accomplished with termios, while
getting rid of the heavy ncurses-dependency.
All termios-tweaks used are POSIX-compliant.

Diffstat:
M
catpoint.c
 | 
36
+++++++++++++++++++-----------------

1 file changed, 19 insertions(+), 17 deletions(-)
diff --git a/catpoint.c b/catpoint.c
@@ -5,11 +5,11 @@
 #include <sys/mman.h>
 
 #include <err.h>
-#include <curses.h>
 #include <fcntl.h>
 #include <locale.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <termios.h>
 #include <unistd.h>
 
 struct slide {
@@ -20,7 +20,7 @@ struct slide {
 static void
 printslide(struct slide *s)
 {
-	printw("%.*s", (int)s->siz, s->buf);
+	printf("%.*s", (int)s->siz, s->buf);
 }
 
 int
@@ -29,6 +29,7 @@ main(int argc, char *argv[])
 	int c, i, fd;
 	struct slide *s;
 	struct stat sb;
+	static struct termios oldterm, newterm;
 
 	if (argc == 1)
 		errx(1, "usage: %s file ...", argv[0]);
@@ -54,31 +55,29 @@ main(int argc, char *argv[])
 		close(fd);
 	}
 
-	/* init curses */
-	initscr();
-	cbreak();
-	noecho();
-	nonl();
-	intrflush(stdscr, FALSE);
-	keypad(stdscr, TRUE);
-	curs_set(FALSE); /* hide cursor */
+	/* set up terminal */
+	tcgetattr(STDIN_FILENO, &oldterm);
+	newterm = oldterm;
+	newterm.c_lflag &= ~(ECHO | ICANON);
+	tcsetattr(STDIN_FILENO, TCSANOW, &newterm);
+	printf("\e[?25l"); /* hide cursor */
 
 	/* start */
 	i = 0;
 show:
 	/* display slide */
-	clear();
+	printf("\x1b[2J\x1b[H"); /* clear */
 	printslide(&s[i]);
 again:
-	c = getch();
+	c = getchar();
 	switch (c) {
 	case 'q':
 		break;
 	/* next */
 	case 'l':
 	case 'j':
-	case KEY_RIGHT:
-	case KEY_DOWN:
+	case 'C': /* right */
+	case 'B': /* down */
 		if (i < argc - 1) {
 			i++;
 			goto show;
@@ -87,13 +86,15 @@ again:
 	/* prev */
 	case 'h':
 	case 'k':
-	case KEY_LEFT:
-	case KEY_UP:
+	case 'D': /* left */
+	case 'A': /* up */
 		if (i > 0) {
 			i--;
 			goto show;
 		}
 		goto again;
+	case '\033':
+	case '[':
 	default:
 		goto again;
 	}
@@ -102,7 +103,8 @@ again:
 	for (i = 0; argv[i] != NULL; i++)
 		munmap(s[i].buf, s[i].siz);
 
-	endwin(); /* restore terminal */
+	printf("\e[?25h"); /* unhide cursor */
+	tcsetattr(STDIN_FILENO, TCSANOW, &oldterm); /* restore terminal */
 
 	return (0);
 }