Reduce visibility wherever possible
[st.git] / x.c
diff --git a/x.c b/x.c
index 49a22e4..f7b0528 100644 (file)
--- a/x.c
+++ b/x.c
@@ -38,10 +38,9 @@ typedef struct {
        KeySym k;
        uint mask;
        char *s;
-       /* three valued logic variables: 0 indifferent, 1 on, -1 off */
+       /* three-valued logic variables: 0 indifferent, 1 on, -1 off */
        signed char appkey;    /* application keypad */
        signed char appcursor; /* application cursor */
-       signed char crlf;      /* crlf mode          */
 } Key;
 
 /* X modifiers */
@@ -52,6 +51,7 @@ typedef struct {
 /* function definitions used in config.h */
 static void clipcopy(const Arg *);
 static void clippaste(const Arg *);
+static void numlock(const Arg *);
 static void selpaste(const Arg *);
 static void zoom(const Arg *);
 static void zoomabs(const Arg *);
@@ -65,6 +65,7 @@ static void zoomreset(const Arg *);
 #define XEMBED_FOCUS_OUT 5
 
 /* macros */
+#define IS_SET(flag)           ((win.mode & (flag)) != 0)
 #define TRUERED(x)             (((x) & 0xff0000) >> 8)
 #define TRUEGREEN(x)           (((x) & 0xff00))
 #define TRUEBLUE(x)            (((x) & 0xff) << 8)
@@ -74,6 +75,15 @@ typedef XftColor Color;
 typedef XftGlyphFontSpec GlyphFontSpec;
 
 /* Purely graphic info */
+typedef struct {
+       int tw, th; /* tty width and height */
+       int w, h; /* window width and height */
+       int ch; /* char height */
+       int cw; /* char width  */
+       int mode; /* window state/mode flags */
+       int cursor; /* cursor style */
+} TermWindow;
+
 typedef struct {
        Display *dpy;
        Colormap cmap;
@@ -128,11 +138,12 @@ static int xmakeglyphfontspecs(XftGlyphFontSpec *, const Glyph *, int, int, int)
 static void xdrawglyphfontspecs(const XftGlyphFontSpec *, Glyph, int, int, int);
 static void xdrawglyph(Glyph, int, int);
 static void xclear(int, int, int, int);
-static void xdrawcursor(void);
 static int xgeommasktogravity(int);
-static void xinit(void);
+static void xinit(int, int);
 static void cresize(int, int);
 static void xresize(int, int);
+static void xhints(void);
+static int xloadcolor(int, const char *, Color *);
 static int xloadfont(Font *, FcPattern *);
 static void xloadfonts(char *, double);
 static void xunloadfont(Font *);
@@ -197,11 +208,6 @@ static XWindow xw;
 static XSelection xsel;
 static TermWindow win;
 
-enum window_state {
-       WIN_VISIBLE = 1,
-       WIN_FOCUSED = 2
-};
-
 /* Font Ring Cache */
 enum {
        FRC_NORMAL,
@@ -232,6 +238,8 @@ static char *opt_line  = NULL;
 static char *opt_name  = NULL;
 static char *opt_title = NULL;
 
+static int oldbutton = 3; /* button event on startup: 3 = release */
+
 void
 clipcopy(const Arg *dummy)
 {
@@ -264,6 +272,12 @@ selpaste(const Arg *dummy)
                        xw.win, CurrentTime);
 }
 
+void
+numlock(const Arg *dummy)
+{
+       win.mode ^= MODE_NUMLOCK;
+}
+
 void
 zoom(const Arg *arg)
 {
@@ -298,18 +312,16 @@ int
 x2col(int x)
 {
        x -= borderpx;
-       x /= win.cw;
-
-       return LIMIT(x, 0, term.col-1);
+       LIMIT(x, 0, win.tw - 1);
+       return x / win.cw;
 }
 
 int
 y2row(int y)
 {
        y -= borderpx;
-       y /= win.ch;
-
-       return LIMIT(y, 0, term.row-1);
+       LIMIT(y, 0, win.th - 1);
+       return y / win.ch;
 }
 
 void
@@ -983,7 +995,7 @@ xunloadfonts(void)
 }
 
 void
-xinit(void)
+xinit(int cols, int rows)
 {
        XGCValues gcvalues;
        Cursor cursor;
@@ -1008,8 +1020,8 @@ xinit(void)
        xloadcols();
 
        /* adjust fixed window geometry */
-       win.w = 2 * borderpx + term.col * win.cw;
-       win.h = 2 * borderpx + term.row * win.ch;
+       win.w = 2 * borderpx + cols * win.cw;
+       win.h = 2 * borderpx + rows * win.ch;
        if (xw.gm & XNegative)
                xw.l += DisplayWidth(xw.dpy, xw.scr) - win.w - 2;
        if (xw.gm & YNegative)
@@ -1041,7 +1053,7 @@ xinit(void)
        XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, win.w, win.h);
 
        /* font spec buffer */
-       xw.specbuf = xmalloc(term.col * sizeof(GlyphFontSpec));
+       xw.specbuf = xmalloc(cols * sizeof(GlyphFontSpec));
 
        /* Xft rendering context */
        xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
@@ -1091,6 +1103,7 @@ xinit(void)
        XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
                        PropModeReplace, (uchar *)&thispid, 1);
 
+       win.mode = MODE_NUMLOCK;
        resettitle();
        XMapWindow(xw.dpy, xw.win);
        xhints();
@@ -1320,14 +1333,13 @@ xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, i
                fg = &revfg;
        }
 
-
        if (base.mode & ATTR_REVERSE) {
                temp = fg;
                fg = bg;
                bg = temp;
        }
 
-       if (base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
+       if (base.mode & ATTR_BLINK && win.mode & MODE_BLINK)
                fg = bg;
 
        if (base.mode & ATTR_INVISIBLE)
@@ -1336,15 +1348,16 @@ xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, i
        /* Intelligent cleaning up of the borders. */
        if (x == 0) {
                xclear(0, (y == 0)? 0 : winy, borderpx,
-                       winy + win.ch + ((y >= term.row-1)? win.h : 0));
+                       winy + win.ch +
+                       ((winy + win.ch >= borderpx + win.th)? win.h : 0));
        }
-       if (x + charlen >= term.col) {
+       if (winx + width >= borderpx + win.tw) {
                xclear(winx + width, (y == 0)? 0 : winy, win.w,
-                       ((y >= term.row-1)? win.h : (winy + win.ch)));
+                       ((winy + win.ch >= borderpx + win.th)? win.h : (winy + win.ch)));
        }
        if (y == 0)
                xclear(winx, 0, winx + width, borderpx);
-       if (y == term.row-1)
+       if (winy + win.ch >= borderpx + win.th)
                xclear(winx, winy + win.ch, winx + width, win.h);
 
        /* Clean up the region we want to draw to. */
@@ -1386,41 +1399,26 @@ xdrawglyph(Glyph g, int x, int y)
 }
 
 void
-xdrawcursor(void)
+xdrawcursor(int cx, int cy, Glyph g, int ox, int oy, Glyph og)
 {
-       static int oldx = 0, oldy = 0;
-       int curx;
-       Glyph g = {' ', ATTR_NULL, defaultbg, defaultcs}, og;
        Color drawcol;
 
-       LIMIT(oldx, 0, term.col-1);
-       LIMIT(oldy, 0, term.row-1);
-
-       curx = term.c.x;
-
-       /* adjust position if in dummy */
-       if (term.line[oldy][oldx].mode & ATTR_WDUMMY)
-               oldx--;
-       if (term.line[term.c.y][curx].mode & ATTR_WDUMMY)
-               curx--;
-
        /* remove the old cursor */
-       og = term.line[oldy][oldx];
-       if (selected(oldx, oldy))
+       if (selected(ox, oy))
                og.mode ^= ATTR_REVERSE;
-       xdrawglyph(og, oldx, oldy);
-
-       g.u = term.line[term.c.y][term.c.x].u;
-       g.mode |= term.line[term.c.y][term.c.x].mode &
-                 (ATTR_BOLD | ATTR_ITALIC | ATTR_UNDERLINE | ATTR_STRUCK);
+       xdrawglyph(og, ox, oy);
 
        /*
         * Select the right color for the right mode.
         */
+       g.mode &= ATTR_BOLD|ATTR_ITALIC|ATTR_UNDERLINE|ATTR_STRUCK|ATTR_WIDE;
+       g.fg = defaultbg;
+       g.bg = defaultcs;
+
        if (IS_SET(MODE_REVERSE)) {
                g.mode |= ATTR_REVERSE;
                g.bg = defaultfg;
-               if (selected(term.c.x, term.c.y)) {
+               if (selected(cx, cy)) {
                        drawcol = dc.col[defaultcs];
                        g.fg = defaultrcs;
                } else {
@@ -1428,7 +1426,7 @@ xdrawcursor(void)
                        g.fg = defaultcs;
                }
        } else {
-               if (selected(term.c.x, term.c.y)) {
+               if (selected(cx, cy)) {
                        drawcol = dc.col[defaultrcs];
                        g.fg = defaultfg;
                        g.bg = defaultrcs;
@@ -1441,51 +1439,49 @@ xdrawcursor(void)
                return;
 
        /* draw the new one */
-       if (win.state & WIN_FOCUSED) {
+       if (IS_SET(MODE_FOCUSED)) {
                switch (win.cursor) {
-               case 7: /* st extension: snowman */
-                       utf8decode("☃", &g.u, UTF_SIZ);
+               case 7: /* st extension: snowman (U+2603) */
+                       g.u = 0x2603;
                case 0: /* Blinking Block */
                case 1: /* Blinking Block (Default) */
                case 2: /* Steady Block */
-                       g.mode |= term.line[term.c.y][curx].mode & ATTR_WIDE;
-                       xdrawglyph(g, term.c.x, term.c.y);
+                       xdrawglyph(g, cx, cy);
                        break;
                case 3: /* Blinking Underline */
                case 4: /* Steady Underline */
                        XftDrawRect(xw.draw, &drawcol,
-                                       borderpx + curx * win.cw,
-                                       borderpx + (term.c.y + 1) * win.ch - \
+                                       borderpx + cx * win.cw,
+                                       borderpx + (cy + 1) * win.ch - \
                                                cursorthickness,
                                        win.cw, cursorthickness);
                        break;
                case 5: /* Blinking bar */
                case 6: /* Steady bar */
                        XftDrawRect(xw.draw, &drawcol,
-                                       borderpx + curx * win.cw,
-                                       borderpx + term.c.y * win.ch,
+                                       borderpx + cx * win.cw,
+                                       borderpx + cy * win.ch,
                                        cursorthickness, win.ch);
                        break;
                }
        } else {
                XftDrawRect(xw.draw, &drawcol,
-                               borderpx + curx * win.cw,
-                               borderpx + term.c.y * win.ch,
+                               borderpx + cx * win.cw,
+                               borderpx + cy * win.ch,
                                win.cw - 1, 1);
                XftDrawRect(xw.draw, &drawcol,
-                               borderpx + curx * win.cw,
-                               borderpx + term.c.y * win.ch,
+                               borderpx + cx * win.cw,
+                               borderpx + cy * win.ch,
                                1, win.ch - 1);
                XftDrawRect(xw.draw, &drawcol,
-                               borderpx + (curx + 1) * win.cw - 1,
-                               borderpx + term.c.y * win.ch,
+                               borderpx + (cx + 1) * win.cw - 1,
+                               borderpx + cy * win.ch,
                                1, win.ch - 1);
                XftDrawRect(xw.draw, &drawcol,
-                               borderpx + curx * win.cw,
-                               borderpx + (term.c.y + 1) * win.ch - 1,
+                               borderpx + cx * win.cw,
+                               borderpx + (cy + 1) * win.ch - 1,
                                win.cw, 1);
        }
-       oldx = curx, oldy = term.c.y;
 }
 
 void
@@ -1510,59 +1506,51 @@ xsettitle(char *p)
        XFree(prop.value);
 }
 
-void
-draw(void)
+int
+xstartdraw(void)
 {
-       drawregion(0, 0, term.col, term.row);
-       XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, win.w,
-                       win.h, 0, 0);
-       XSetForeground(xw.dpy, dc.gc,
-                       dc.col[IS_SET(MODE_REVERSE)?
-                               defaultfg : defaultbg].pixel);
+       return IS_SET(MODE_VISIBLE);
 }
 
 void
-drawregion(int x1, int y1, int x2, int y2)
+xdrawline(Line line, int x1, int y1, int x2)
 {
-       int i, x, y, ox, numspecs;
+       int i, x, ox, numspecs;
        Glyph base, new;
-       XftGlyphFontSpec *specs;
+       XftGlyphFontSpec *specs = xw.specbuf;
 
-       if (!(win.state & WIN_VISIBLE))
-               return;
-
-       for (y = y1; y < y2; y++) {
-               if (!term.dirty[y])
+       numspecs = xmakeglyphfontspecs(specs, &line[x1], x2 - x1, x1, y1);
+       i = ox = 0;
+       for (x = x1; x < x2 && i < numspecs; x++) {
+               new = line[x];
+               if (new.mode == ATTR_WDUMMY)
                        continue;
-
-               term.dirty[y] = 0;
-
-               specs = xw.specbuf;
-               numspecs = xmakeglyphfontspecs(specs, &term.line[y][x1], x2 - x1, x1, y);
-
-               i = ox = 0;
-               for (x = x1; x < x2 && i < numspecs; x++) {
-                       new = term.line[y][x];
-                       if (new.mode == ATTR_WDUMMY)
-                               continue;
-                       if (selected(x, y))
-                               new.mode ^= ATTR_REVERSE;
-                       if (i > 0 && ATTRCMP(base, new)) {
-                               xdrawglyphfontspecs(specs, base, i, ox, y);
-                               specs += i;
-                               numspecs -= i;
-                               i = 0;
-                       }
-                       if (i == 0) {
-                               ox = x;
-                               base = new;
-                       }
-                       i++;
+               if (selected(x, y1))
+                       new.mode ^= ATTR_REVERSE;
+               if (i > 0 && ATTRCMP(base, new)) {
+                       xdrawglyphfontspecs(specs, base, i, ox, y1);
+                       specs += i;
+                       numspecs -= i;
+                       i = 0;
+               }
+               if (i == 0) {
+                       ox = x;
+                       base = new;
                }
-               if (i > 0)
-                       xdrawglyphfontspecs(specs, base, i, ox, y);
+               i++;
        }
-       xdrawcursor();
+       if (i > 0)
+               xdrawglyphfontspecs(specs, base, i, ox, y1);
+}
+
+void
+xfinishdraw(void)
+{
+       XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, win.w,
+                       win.h, 0, 0);
+       XSetForeground(xw.dpy, dc.gc,
+                       dc.col[IS_SET(MODE_REVERSE)?
+                               defaultfg : defaultbg].pixel);
 }
 
 void
@@ -1576,13 +1564,13 @@ visibility(XEvent *ev)
 {
        XVisibilityEvent *e = &ev->xvisibility;
 
-       MODBIT(win.state, e->state != VisibilityFullyObscured, WIN_VISIBLE);
+       MODBIT(win.mode, e->state != VisibilityFullyObscured, MODE_VISIBLE);
 }
 
 void
 unmap(XEvent *ev)
 {
-       win.state &= ~WIN_VISIBLE;
+       win.mode &= ~MODE_VISIBLE;
 }
 
 void
@@ -1592,6 +1580,15 @@ xsetpointermotion(int set)
        XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
 }
 
+void
+xsetmode(int set, unsigned int flags)
+{
+       int mode = win.mode;
+       MODBIT(win.mode, set, flags);
+       if ((win.mode & MODE_REVERSE) != (mode & MODE_REVERSE))
+               redraw();
+}
+
 int
 xsetcursor(int cursor)
 {
@@ -1615,7 +1612,7 @@ xseturgency(int add)
 void
 xbell(void)
 {
-       if (!(win.state & WIN_FOCUSED))
+       if (!(IS_SET(MODE_FOCUSED)))
                xseturgency(1);
        if (bellvolume)
                XkbBell(xw.dpy, xw.win, bellvolume, (Atom)NULL);
@@ -1631,13 +1628,13 @@ focus(XEvent *ev)
 
        if (ev->type == FocusIn) {
                XSetICFocus(xw.xic);
-               win.state |= WIN_FOCUSED;
+               win.mode |= MODE_FOCUSED;
                xseturgency(0);
                if (IS_SET(MODE_FOCUS))
                        ttywrite("\033[I", 3, 0);
        } else {
                XUnsetICFocus(xw.xic);
-               win.state &= ~WIN_FOCUSED;
+               win.mode &= ~MODE_FOCUSED;
                if (IS_SET(MODE_FOCUS))
                        ttywrite("\033[O", 3, 0);
        }
@@ -1674,15 +1671,12 @@ kmap(KeySym k, uint state)
 
                if (IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
                        continue;
-               if (term.numlock && kp->appkey == 2)
+               if (IS_SET(MODE_NUMLOCK) && kp->appkey == 2)
                        continue;
 
                if (IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
                        continue;
 
-               if (IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
-                       continue;
-
                return kp->s;
        }
 
@@ -1746,14 +1740,13 @@ cmessage(XEvent *e)
         */
        if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
                if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
-                       win.state |= WIN_FOCUSED;
+                       win.mode |= MODE_FOCUSED;
                        xseturgency(0);
                } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
-                       win.state &= ~WIN_FOCUSED;
+                       win.mode &= ~MODE_FOCUSED;
                }
        } else if (e->xclient.data.l[0] == xw.wmdeletewin) {
-               /* Send SIGHUP to shell */
-               kill(pid, SIGHUP);
+               ttyhangup();
                exit(0);
        }
 }
@@ -1774,6 +1767,7 @@ run(void)
        int w = win.w, h = win.h;
        fd_set rfd;
        int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
+       int ttyfd;
        struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
        long deltatime;
 
@@ -1793,7 +1787,7 @@ run(void)
                }
        } while (ev.type != MapNotify);
 
-       ttynew(opt_line, opt_io, opt_cmd);
+       ttyfd = ttynew(opt_line, shell, opt_io, opt_cmd);
        cresize(w, h);
 
        clock_gettime(CLOCK_MONOTONIC, &last);
@@ -1801,20 +1795,20 @@ run(void)
 
        for (xev = actionfps;;) {
                FD_ZERO(&rfd);
-               FD_SET(cmdfd, &rfd);
+               FD_SET(ttyfd, &rfd);
                FD_SET(xfd, &rfd);
 
-               if (pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
+               if (pselect(MAX(xfd, ttyfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
                        if (errno == EINTR)
                                continue;
                        die("select failed: %s\n", strerror(errno));
                }
-               if (FD_ISSET(cmdfd, &rfd)) {
+               if (FD_ISSET(ttyfd, &rfd)) {
                        ttyread();
                        if (blinktimeout) {
                                blinkset = tattrset(ATTR_BLINK);
                                if (!blinkset)
-                                       MODBIT(term.mode, 0, MODE_BLINK);
+                                       MODBIT(win.mode, 0, MODE_BLINK);
                        }
                }
 
@@ -1829,7 +1823,7 @@ run(void)
                dodraw = 0;
                if (blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
                        tsetdirtattr(ATTR_BLINK);
-                       term.mode ^= MODE_BLINK;
+                       win.mode ^= MODE_BLINK;
                        lastblink = now;
                        dodraw = 1;
                }
@@ -1853,7 +1847,7 @@ run(void)
 
                        if (xev && !FD_ISSET(xfd, &rfd))
                                xev--;
-                       if (!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
+                       if (!FD_ISSET(ttyfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
                                if (blinkset) {
                                        if (TIMEDIFF(now, lastblink) \
                                                        > blinktimeout) {
@@ -1948,8 +1942,10 @@ run:
        }
        setlocale(LC_CTYPE, "");
        XSetLocaleModifiers("");
-       tnew(MAX(cols, 1), MAX(rows, 1));
-       xinit();
+       cols = MAX(cols, 1);
+       rows = MAX(rows, 1);
+       tnew(cols, rows);
+       xinit(cols, rows);
        xsetenv();
        selinit();
        run();