X-Git-Url: https://git.danieliu.xyz/?a=blobdiff_plain;f=st.c;h=b7dfd559ab211369fa866304735910f225ae8170;hb=c084c06b402de4fe995734a2c89cae26ff7c9064;hp=d169ddfe592cd3ec7fe2a04bf034549bea9a679d;hpb=ee7fd748ac7bfabda2ac37251d230b45adb3e138;p=st.git

diff --git a/st.c b/st.c
index d169ddf..b7dfd55 100644
--- a/st.c
+++ b/st.c
@@ -1203,6 +1203,18 @@ csihandle(void) {
 		DEFAULT(escseq.arg[0], 1);
 		tmoveto(0, term.c.y-escseq.arg[0]);
 		break;
+	case 'g': /* TBC -- Tabulation clear */
+		switch (escseq.arg[0]) {
+		case 0: /* clear current tab stop */
+			term.tabs[term.c.x] = 0;
+			break;
+		case 3: /* clear all the tabs */
+			memset(term.tabs, 0, term.col * sizeof(*term.tabs));
+			break;
+		default:
+			goto unknown;
+		}
+		break;
 	case 'G': /* CHA -- Move to <col> */
 	case '`': /* XXX: HPA -- same? */
 		DEFAULT(escseq.arg[0], 1);
@@ -1214,7 +1226,6 @@ csihandle(void) {
 		DEFAULT(escseq.arg[1], 1);
 		tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
 		break;
-	/* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
 	case 'J': /* ED -- Clear screen */
 		sel.bx = -1;
 		switch(escseq.arg[0]) {
@@ -1429,8 +1440,11 @@ csireset(void) {
 
 void
 tputtab(void) {
-	int space = TAB - term.c.x % TAB;
-	tmoveto(term.c.x + space, term.c.y);
+	unsigned x;
+
+	for (x = term.c.x + 1; x < term.col && !term.tabs[x]; ++x)
+		/* nothing */ ;
+	tmoveto(x, term.c.y);
 }
 
 void
@@ -1491,6 +1505,10 @@ tputc(char *c) {
 				tnewline(1); /* always go to first col */
 				term.esc = 0;
 				break;
+			case 'H': /* HTS -- Horizontal tab stop */
+				term.tabs[term.c.x] = 1;
+				term.esc = 0;
+				break;
 			case 'M': /* RI -- Reverse index */
 				if(term.c.y == term.top)
 					tscrolldown(term.top, 1);