From 9e1088749bee6c101143a17ca853b01c8163ac91 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?John=20Ankarstr=C3=B6m?= <john@ankarstrom.se>
Date: Fri, 6 Nov 2020 23:13:26 +0100
Subject: whatever

---
 l.c | 61 +++++++++++++++++++++++++++++++++++++++++++++++--------------
 1 file changed, 47 insertions(+), 14 deletions(-)

diff --git a/l.c b/l.c
index c707aea..2bcbfd9 100644
--- a/l.c
+++ b/l.c
@@ -14,8 +14,17 @@
 
 #define prn(...) dprintf(ttyfd, __VA_ARGS__)
 
+char *lines[3] = {
+	"line 1",
+	"line 2",
+	"line 3"
+};
+
+int current = -1; /* currently selected item */
+int height = 3; /* height of output in rows */
 int ttyfd;
-
+int x, y; /* original cursor position in cols, rows */
+	
 /* enable/disable "raw" mode */
 void raw(bool enable) {
 	int r;
@@ -23,7 +32,7 @@ void raw(bool enable) {
 	struct termios raw;
 
 	if (enable) {
-		r = tcgetattr(0, &orig);
+		r = tcgetattr(ttyfd, &orig);
 		if (r == -1) err(1, "tcgetattr");
 
 		raw = orig;
@@ -32,11 +41,11 @@ void raw(bool enable) {
 		raw.c_cflag |= CS8;
 		raw.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG);
 
-		r = tcsetattr(0, TCSAFLUSH, &raw);
+		r = tcsetattr(ttyfd, TCSAFLUSH, &raw);
 		if (r == -1) err(1, "tcsetattr");
 
 	} else
-		tcsetattr(0, TCSAFLUSH, &orig);
+		tcsetattr(ttyfd, TCSAFLUSH, &orig);
 }
 
 /* cursor position report */
@@ -76,19 +85,31 @@ int cpr(int *x, int *y) {
 	return 0;
 }
 
-void up() {}
-void down() {}
-void right() {}
-void left() {}
+/* select item */
+int item(int n) {
+	if (n < 1 || n > height) return -1;
+	if (current != -1)
+		prn("%s", lines[current - 1]);
+	current = n;
+	prn("%s%d;%dH", CSI, y + n - 1, 0);
+	prn(CSI "7m");
+	prn("%s", lines[n - 1]);
+	prn(CSI "0m");
+	prn("%s%d;%dH", CSI, y + n - 1, 0);
+	return 0;
+}
+
+int up() { return item(current-1); }
+int down() { return item(current+1); }
+int right() {}
+int left() {}
 
 int main() {
-	char c, *p;
+	char c, *p, *phrase;
 	int i, r;
 	struct winsize w;
-	int height; /* height of output in rows */
-	int x, y; /* original cursor position in cols, rows */
 
-	char *ex = "file1 file2 file3\r\nfile4 file5 file6\r\nfile7";
+	phrase = NULL;
 
 	ttyfd = open("/dev/tty", O_RDWR);
 	if (ttyfd == -1) err(1, "open");
@@ -100,9 +121,11 @@ int main() {
 	if (r == -1) goto quit;
 
 	/* print output */
-	prn("%s", ex);
+	for (i = 0; i < height; i++)
+		prn("%s\r\n", lines[i]);
 
 	/* get height of output */
+	/*
 	p = ex - 1;
 	height = 0;
 	while (*(++p) != '\0')
@@ -120,6 +143,9 @@ int main() {
 	/* restore original cursor position (CUP) */
 	prn("%s%d;%dH", CSI, y, x);
 
+	/* select first item */
+	item(1);
+
 	while (read(0, &c, 1) != 0) {
 		switch (c) {
 		case 'q':
@@ -134,10 +160,17 @@ int main() {
 			if (c == 'C') right();
 			if (c == 'D') left();
 			break;
+		case 13: /* enter */
+			goto quit;
+			phrase = lines[current - 1];
+			break;
 		}
 	}
 	
 quit:
-	prn(CSI "J"); /* delete from cursor to end of display (ED) */
+	//prn("%s%d;%dH", CSI, y, x);
+	//prn(CSI "J"); /* delete from cursor to end of display (ED) */
 	raw(false);
+	if (phrase != NULL)
+		printf("%s\n", phrase);
 }
-- 
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