Enable blinking in st.

[st.git] / st.c

diff --git a/st.c b/st.c
index 7f53981..8065ebe 100644 (file)
--- a/st.c
+++ b/st.c
@@ -116,6 +116,8 @@ enum term_mode {
        MODE_APPCURSOR   = 2048,
        MODE_MOUSESGR    = 4096,
        MODE_8BIT        = 8192,
+       MODE_BLINK       = 16384,
+       MODE_FBLINK      = 32768,
 };
 
 enum escape_state {
@@ -313,6 +315,7 @@ static void strhandle(void);
 static void strparse(void);
 static void strreset(void);
 
+static int tattrset(int);
 static void tclearregion(int, int, int, int);
 static void tcursor(int);
 static void tdeletechar(int);
@@ -334,6 +337,7 @@ static void tsetchar(char *, Glyph *, int, int);
 static void tsetscroll(int, int);
 static void tswapscreen(void);
 static void tsetdirt(int, int);
+static void tsetdirtattr(int);
 static void tsetmode(bool, bool, int *, int);
 static void tfulldirt(void);
 static void techo(char *, int);
@@ -785,11 +789,8 @@ bpress(XEvent *e) {
                sel.ey = sel.by = y2row(e->xbutton.y);
 
                /*
-                * Snap handling.
-                * If user clicks are fasst enough (e.g. below timeouts),
-                * we ignore if his hand slipped left or down and accidentally
-                * selected more; we are just snapping to whatever we're
-                * snapping.
+                * If the user clicks below predefined timeouts specific
+                * snapping behaviour is exposed.
                 */
                if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
                        sel.snap = SNAP_LINE;
@@ -809,7 +810,8 @@ bpress(XEvent *e) {
                 * Draw selection, unless it's regular and we don't want to
                 * make clicks visible
                 */
-               if (sel.snap != 0) {
+               if(sel.snap != 0) {
+                       sel.mode++;
                        tsetdirt(sel.b.y, sel.e.y);
                        draw();
                }
@@ -987,14 +989,14 @@ brelease(XEvent *e) {
        if(e->xbutton.button == Button2) {
                selpaste(NULL);
        } else if(e->xbutton.button == Button1) {
-               sel.mode = 0;
-               getbuttoninfo(e);
-               term.dirty[sel.ey] = 1;
-               if(sel.bx == sel.ex && sel.by == sel.ey) {
+               if(sel.mode < 2) {
                        sel.bx = -1;
                } else {
+                       getbuttoninfo(e);
                        selcopy();
                }
+               sel.mode = 0;
+               term.dirty[sel.ey] = 1;
        }
 }
 
@@ -1010,6 +1012,7 @@ bmotion(XEvent *e) {
        if(!sel.mode)
                return;
 
+       sel.mode++;
        oldey = sel.ey;
        oldex = sel.ex;
        oldsby = sel.b.y;
@@ -1176,6 +1179,20 @@ ttyresize(void) {
                fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
 }
 
+int
+tattrset(int attr) {
+       int i, j;
+
+       for(i = 0; i < term.row-1; i++) {
+               for(j = 0; j < term.col-1; j++) {
+                       if(term.line[i][j].mode & attr)
+                               return 1;
+               }
+       }
+
+       return 0;
+}
+
 void
 tsetdirt(int top, int bot) {
        int i;
@@ -1188,6 +1205,20 @@ tsetdirt(int top, int bot) {
 }
 
 void
+tsetdirtattr(int attr) {
+       int i, j;
+
+       for(i = 0; i < term.row-1; i++) {
+               for(j = 0; j < term.col-1; j++) {
+                       if(term.line[i][j].mode & attr) {
+                               tsetdirt(i, i);
+                               break;
+                       }
+               }
+       }
+}
+
+void
 tfulldirt(void) {
        tsetdirt(0, term.row-1);
 }
@@ -1425,6 +1456,8 @@ tclearregion(int x1, int y1, int x2, int y2) {
        for(y = y1; y <= y2; y++) {
                term.dirty[y] = 1;
                for(x = x1; x <= x2; x++) {
+                       if(selected(x, y))
+                               selclear(NULL);
                        term.line[y][x] = term.c.attr;
                        memcpy(term.line[y][x].c, " ", 2);
                }
@@ -2837,6 +2870,9 @@ xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
                bg = temp;
        }
 
+       if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
+               fg = bg;
+
        /* Intelligent cleaning up of the borders. */
        if(x == 0) {
                xclear(0, (y == 0)? 0 : winy, borderpx,
@@ -3094,7 +3130,7 @@ drawregion(int x1, int y1, int x2, int y2) {
                ic = ib = ox = 0;
                for(x = x1; x < x2; x++) {
                        new = term.line[y][x];
-                       if(ena_sel && *(new.c) && selected(x, y))
+                       if(ena_sel && selected(x, y))
                                new.mode ^= ATTR_REVERSE;
                        if(ib > 0 && (ATTRCMP(base, new)
                                        || ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
@@ -3344,34 +3380,55 @@ void
 run(void) {
        XEvent ev;
        fd_set rfd;
-       int xfd = XConnectionNumber(xw.dpy), xev;
-       struct timeval drawtimeout, *tv = NULL, now, last;
+       int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
+       struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
 
+       gettimeofday(&lastblink, NULL);
        gettimeofday(&last, NULL);
 
        for(xev = actionfps;;) {
                FD_ZERO(&rfd);
                FD_SET(cmdfd, &rfd);
                FD_SET(xfd, &rfd);
-               if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
+
+               switch(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
+               case -1:
                        if(errno == EINTR)
                                continue;
                        die("select failed: %s\n", SERRNO);
-               }
+               default:
+                       if(FD_ISSET(cmdfd, &rfd)) {
+                               ttyread();
+                               if(blinktimeout) {
+                                       blinkset = tattrset(ATTR_BLINK);
+                                       if(!blinkset && term.mode & ATTR_BLINK)
+                                               term.mode &= ~(MODE_BLINK);
+                               }
+                       }
 
+                       if(FD_ISSET(xfd, &rfd))
+                               xev = actionfps;
+                       break;
+               }
                gettimeofday(&now, NULL);
                drawtimeout.tv_sec = 0;
                drawtimeout.tv_usec = (1000/xfps) * 1000;
                tv = &drawtimeout;
 
-               if(FD_ISSET(cmdfd, &rfd))
-                       ttyread();
-
-               if(FD_ISSET(xfd, &rfd))
-                       xev = actionfps;
+               dodraw = 0;
+               if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
+                       tsetdirtattr(ATTR_BLINK);
+                       term.mode ^= MODE_BLINK;
+                       gettimeofday(&lastblink, NULL);
+                       dodraw = 1;
+               }
+               if(TIMEDIFF(now, last) \
+                               > (xev? (1000/xfps) : (1000/actionfps))) {
+                       dodraw = 1;
+                       last = now;
+               }
 
-               if(TIMEDIFF(now, last) > \
-                               (xev ? (1000/xfps) : (1000/actionfps))) {
+               if(dodraw) {
                        while(XPending(xw.dpy)) {
                                XNextEvent(xw.dpy, &ev);
                                if(XFilterEvent(&ev, None))
@@ -3382,12 +3439,13 @@ run(void) {
 
                        draw();
                        XFlush(xw.dpy);
-                       last = now;
 
                        if(xev && !FD_ISSET(xfd, &rfd))
                                xev--;
-                       if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd))
+                       if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd) \
+                                       && !blinkset) {
                                tv = NULL;
+                       }
                }
        }
 }