[dev] [st] Add insert mode

[Eckehard Berns]

I added some code to make insert mode work in st. I don't know if I
missed something, but It's Working For Me(tm). Patch attached.

-- 
Eckehard Berns

diff -r 19ef42df8e7d st.c
--- a/st.c      Wed Nov 14 06:37:24 2012 +0100
+++ b/st.c      Thu Nov 15 15:19:52 2012 +0100
@@ -2100,6 +2100,10 @@
                sel.bx = -1;
        if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
                tnewline(1); /* always go to first col */
+       if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col)
+               memmove(&term.line[term.c.y][term.c.x+1],
+                       &term.line[term.c.y][term.c.x],
+                       (term.col - term.c.x - 1) * sizeof(Glyph));
        tsetchar(c, &term.c.attr, term.c.x, term.c.y);
        if(term.c.x+1 < term.col)
                tmoveto(term.c.x+1, term.c.y);
diff -r 19ef42df8e7d st.info
--- a/st.info   Wed Nov 14 06:37:24 2012 +0100
+++ b/st.info   Thu Nov 15 15:19:52 2012 +0100
@@ -153,6 +153,7 @@
        ritm=\E[23m,
        rmacs=\E(B,
        rmcup=\E[?1049l,
+       rmir=\E[4l,
        rmkx=\E[?1l\E>,
        rmso=\E[23m,
        rmul=\E[m,
@@ -168,6 +169,7 @@
        sitm=\E[3m,
        smacs=\E(0,
        smcup=\E[?1049h,
+       smir=\E[4h,
        smkx=\E[?1h\E=,
        smso=\E[3m,
        smul=\E[4m,