st

fork of suckless's simple terminal
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commit 93901ca4fee8a1ab71cb8b918f3d65404460f9ce
parent ee7fd748ac7bfabda2ac37251d230b45adb3e138
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Wed, 29 Aug 2012 19:59:43 +0200

Add HTS sequence

This sequence adds a new tab stop in the current horizontal position. This
means that tputtab must be look for the next tab stop in the tabs array
instead of using a hard coded value offset. Also, CHT sequence XXX message
is removed because it is not a vt10x sequence (as far as I know it is a
vt50x sequence), and it is not implemented by linux virtual terminal neither
by xterm.

Signed-off-by: Roberto E. Vargas Caballero <k0ga@shike2.com>
---
 st.c |   12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)
Diffstat:
Mst.c | 12+++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/st.c b/st.c
@@ -1214,7 +1214,6 @@ 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 +1428,11 @@ 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 +1493,10 @@ 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);