Allow control characters inside escape sequences

Taken from vt100 manual programmer:

	Control characters (codes \0 to \37 inclusive) are specifically
	excluded from the control sequence syntax, but may be embedded
	within a control sequence. Embedded control characters are executed
	as soon as they are encountered by the VT100. The processing of the
	control sequence then continues with the next character received.
---
 st.c |   68 +++++++++++++++++++++++++++++++++---------------------------------
 1 file changed, 34 insertions(+), 34 deletions(-)

diff --git a/st.c b/st.c
index 515dfb1..2767d54 100644 (file)
--- a/st.c
+++ b/st.c
@@ -1668,6 +1668,32 @@ tputc(char *c, int len) {
        if(iofd != -1)
                write(iofd, c, len);
 
+       switch(ascii) {
+       case '\t':
+               tputtab(1);
+               return;
+       case '\b':
+               tmoveto(term.c.x-1, term.c.y);
+               return;
+       case '\r':
+               tmoveto(0, term.c.y);
+               return;
+       case '\f':
+       case '\v':
+       case '\n':
+               /* go to first col if the mode is set */
+               tnewline(IS_SET(MODE_CRLF));
+               return;
+       case '\a':
+               if(!(xw.state & WIN_FOCUSED))
+                       xseturgency(1);
+               return;
+       case '\033':
+               csireset();
+               term.esc = ESC_START;
+               return;
+       }
+
        if(term.esc & ESC_START) {
                if(term.esc & ESC_CSI) {
                        csiescseq.buf[csiescseq.len++] = ascii;
@@ -1791,40 +1817,14 @@ tputc(char *c, int len) {
        } else {
                if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
                        sel.bx = -1;
-               switch(ascii) {
-               case '\t':
-                       tputtab(1);
-                       break;
-               case '\b':
-                       tmoveto(term.c.x-1, term.c.y);
-                       break;
-               case '\r':
-                       tmoveto(0, term.c.y);
-                       break;
-               case '\f':
-               case '\v':
-               case '\n':
-                       /* go to first col if the mode is set */
-                       tnewline(IS_SET(MODE_CRLF));
-                       break;
-               case '\a':
-                       if(!(xw.state & WIN_FOCUSED))
-                               xseturgency(1);
-                       break;
-               case '\033':
-                       csireset();
-                       term.esc = ESC_START;
-                       break;
-               default:
-                       if(ascii >= '\020' || term.c.attr.mode & ATTR_GFX) {
-                               if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
-                                       tnewline(1); /* always go to first col */
-                               tsetchar(c);
-                               if(term.c.x+1 < term.col)
-                                       tmoveto(term.c.x+1, term.c.y);
-                               else
-                                       term.c.state |= CURSOR_WRAPNEXT;
-                       }
+               if(ascii >= '\020' || term.c.attr.mode & ATTR_GFX) {
+                       if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
+                               tnewline(1); /* always go to first col */
+                       tsetchar(c);
+                       if(term.c.x+1 < term.col)
+                               tmoveto(term.c.x+1, term.c.y);
+                       else
+                               term.c.state |= CURSOR_WRAPNEXT;
                }
        }
 }