lchat

commit c2233eb6bae4c356cd92d71b9173bd3c62fed00e
parent 5ee1873a1ec3bc220efc5e1d1203b6fec97b8b71
Author: shuall <shualloret@gmail.com>
Date:   Tue, 18 Jul 2017 20:37:40 -0400

add some more control codes

Using st, and these are more for my own convenience.
I'm not sure how they translate to other terminals.
- ctrl+u sends NAK, so clear line on NAK
- home and end don't send 'home' and 'end' vt100 codes,
  they send \033[7~ and \033[8~ respectively

Diffstat:
M
slackline.c
 | 
33
+++++++++++++++++++++++++++++++++
M
slackline.h
 | 
3
++-

2 files changed, 35 insertions(+), 1 deletion(-)
diff --git a/slackline.c b/slackline.c
@@ -157,9 +157,39 @@ sl_keystroke(struct slackline *sl, int key)
 			sl->last -= ncur - sl->ptr;
 			*sl->last = '\0';
 			break;
+		case '0':
+		case '1':
+		case '2':
+		case '3':
+		case '4':
+		case '5':
+		case '6':
+		case '7':
+		case '8':
+		case '9':
+			sl->nummod = key;
+			sl->esc = ESC_BRACKET_NUM;
+			return 0;
 		}
 		sl->esc = ESC_NONE;
 		return 0;
+	case ESC_BRACKET_NUM:
+		switch(key) {
+		case '~':
+			switch(sl->nummod) {
+			case '7':
+				sl->bcur = sl->rcur = 0;
+				sl->ptr = sl->buf;
+				break;
+			case '8':
+				sl->rcur = sl->rlen;
+				sl->bcur = sl_postobyte(sl, sl->rcur);
+				sl->ptr = sl->buf + sl->bcur;
+				break;
+			}
+			sl->esc = ESC_NONE;
+			return 0;
+		}
 	}
 
 	/* handle ctl keys */
@@ -188,6 +218,9 @@ sl_keystroke(struct slackline *sl, int key)
 		sl->ptr = ncur;
 
 		return 0;
+	case 21: /* ctrl+u or clearline, weird that it's a NAK */
+		sl_reset(sl);
+		return 0;
 	}
 
 	/* byte-wise composing of UTF-8 runes */
diff --git a/slackline.h b/slackline.h
@@ -3,7 +3,7 @@
 
 #include <stdbool.h>
 
-enum esc_seq {ESC_NONE, ESC, ESC_BRACKET};
+enum esc_seq {ESC_NONE, ESC, ESC_BRACKET, ESC_BRACKET_NUM};
 
 struct slackline {
 	/* buffer */
@@ -21,6 +21,7 @@ struct slackline {
 	size_t rlen;	/* amount of runes */
 
 	enum esc_seq esc;
+	char nummod;
 
 	/* UTF-8 handling */
 	char ubuf[6];	/* UTF-8 buffer */