Support the DECSCUSR CSI escape sequence

1 files changed, 49 insertions, 13 deletions

diff --git a/st.c b/st.c
index aa4185c..00fca99 100644
--- a/st.c
+++ b/st.c
@@ -197,14 +197,14 @@ typedef struct {
 } TCursor;
 
 /* CSI Escape sequence structs */
-/* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
+/* ESC '[' [[ [<priv>] <arg> [;]] <mode> [<mode>]] */
 typedef struct {
         char buf[ESC_BUF_SIZ]; /* raw string */
         int len;               /* raw string length */
         char priv;
         int arg[ESC_ARG_SIZ];
         int narg;              /* nb of args */
-        char mode;
+        char mode[2];
 } CSIEscape;
 
 /* STR Escape sequence structs */
@@ -257,6 +257,7 @@ typedef struct {
         int ch; /* char height */
         int cw; /* char width  */
         char state; /* focus, redraw, visible */
+        int cursor; /* cursor style */
 } XWindow;
 
 typedef struct {
@@ -1545,7 +1546,8 @@ csiparse(void) {
                         break;
                 p++;
         }
-        csiescseq.mode = *p;
+        csiescseq.mode[0] = *p++;
+        csiescseq.mode[1] = (p < csiescseq.buf+csiescseq.len) ? *p : '\0';
 }
 
 /* for absolute user moves, when decom is set */
@@ -1983,7 +1985,7 @@ csihandle(void) {
         char buf[40];
         int len;
 
-        switch(csiescseq.mode) {
+        switch(csiescseq.mode[0]) {
         default:
         unknown:
                 fprintf(stderr, "erresc: unknown csi ");
@@ -2171,6 +2173,19 @@ csihandle(void) {
         case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
                 tcursor(CURSOR_LOAD);
                 break;
+        case ' ':
+                switch (csiescseq.mode[1]) {
+                        case 'q': /* DECSCUSR -- Set Cursor Style */
+                                DEFAULT(csiescseq.arg[0], 1);
+                                if (!BETWEEN(csiescseq.arg[0], 0, 6)) {
+                                        goto unknown;
+                                }
+                                xw.cursor = csiescseq.arg[0];
+                                break;
+                        default:
+                                goto unknown;
+                }
+                break;
         }
 }
 
@@ -3551,16 +3566,36 @@ xdrawcursor(void) {
 
         /* draw the new one */
         if(xw.state & WIN_FOCUSED) {
-                if(IS_SET(MODE_REVERSE)) {
-                        g.mode |= ATTR_REVERSE;
-                        g.fg = defaultcs;
-                        g.bg = defaultfg;
-                }
+                switch (xw.cursor) {
+                        case 0: /* Blinking Block */
+                        case 1: /* Blinking Block (Default) */
+                        case 2: /* Steady Block */
+                                if(IS_SET(MODE_REVERSE)) {
+                                                g.mode |= ATTR_REVERSE;
+                                                g.fg = defaultcs;
+                                                g.bg = defaultfg;
+                                        }
 
-                sl = utf8len(g.c);
-                width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
-                        ? 2 : 1;
-                xdraws(g.c, g, term.c.x, term.c.y, width, sl);
+                                sl = utf8len(g.c);
+                                width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
+                                        ? 2 : 1;
+                                xdraws(g.c, g, term.c.x, term.c.y, width, sl);
+                                break;
+                        case 3: /* Blinking Underline */
+                        case 4: /* Steady Underline */
+                                XftDrawRect(xw.draw, &dc.col[defaultcs],
+                                                borderpx + curx * xw.cw,
+                                                borderpx + (term.c.y + 1) * xw.ch - 1,
+                                                xw.cw, 1);
+                                break;
+                        case 5: /* Blinking bar */
+                        case 6: /* Steady bar */
+                                XftDrawRect(xw.draw, &dc.col[defaultcs],
+                                                                borderpx + curx * xw.cw,
+                                                                borderpx + term.c.y * xw.ch,
+                                                                1, xw.ch);
+                                break;
+                }
         } else {
                 XftDrawRect(xw.draw, &dc.col[defaultcs],
                                 borderpx + curx * xw.cw,
@@ -3985,6 +4020,7 @@ main(int argc, char *argv[]) {
 
         xw.l = xw.t = 0;
         xw.isfixed = False;
+        xw.cursor = 0;
 
         ARGBEGIN {
         case 'a':