Xinqi Bao's Git

inputw: improve correctness and startup performance
[dmenu.git] / drw.c
diff --git a/drw.c b/drw.c
index 95839c9..7d985b1 100644 (file)
--- a/drw.c
+++ b/drw.c
@@ -95,6 +95,7 @@ drw_free(Drw *drw)
 {
        XFreePixmap(drw->dpy, drw->drawable);
        XFreeGC(drw->dpy, drw->gc);
+       drw_fontset_free(drw->fonts);
        free(drw);
 }
 
@@ -129,7 +130,20 @@ xfont_create(Drw *drw, const char *fontname, FcPattern *fontpattern)
                        return NULL;
                }
        } else {
-               die("no font specified.\n");
+               die("no font specified.");
+       }
+
+       /* Do not allow using color fonts. This is a workaround for a BadLength
+        * error from Xft with color glyphs. Modelled on the Xterm workaround. See
+        * https://bugzilla.redhat.com/show_bug.cgi?id=1498269
+        * https://lists.suckless.org/dev/1701/30932.html
+        * https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=916349
+        * and lots more all over the internet.
+        */
+       FcBool iscol;
+       if(FcPatternGetBool(xfont->pattern, FC_COLOR, 0, &iscol) == FcResultMatch && iscol) {
+               XftFontClose(drw->dpy, xfont);
+               return NULL;
        }
 
        font = ecalloc(1, sizeof(Fnt));
@@ -188,7 +202,7 @@ drw_clr_create(Drw *drw, Clr *dest, const char *clrname)
        if (!XftColorAllocName(drw->dpy, DefaultVisual(drw->dpy, drw->screen),
                               DefaultColormap(drw->dpy, drw->screen),
                               clrname, dest))
-               die("error, cannot allocate color '%s'\n", clrname);
+               die("error, cannot allocate color '%s'", clrname);
 }
 
 /* Wrapper to create color schemes. The caller has to call free(3) on the
@@ -237,12 +251,10 @@ drw_rect(Drw *drw, int x, int y, unsigned int w, unsigned int h, int filled, int
 int
 drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, unsigned int lpad, const char *text, int invert)
 {
-       char buf[1024];
-       int ty;
-       unsigned int ew;
+       int ty, ellipsis_x = 0;
+       unsigned int tmpw, ew, ellipsis_w = 0, ellipsis_len, ellipsis_width;
        XftDraw *d = NULL;
        Fnt *usedfont, *curfont, *nextfont;
-       size_t i, len;
        int utf8strlen, utf8charlen, render = x || y || w || h;
        long utf8codepoint = 0;
        const char *utf8str;
@@ -250,13 +262,13 @@ drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, unsigned int lp
        FcPattern *fcpattern;
        FcPattern *match;
        XftResult result;
-       int charexists = 0;
+       int charexists = 0, overflow = 0;
 
        if (!drw || (render && !drw->scheme) || !text || !drw->fonts)
                return 0;
 
        if (!render) {
-               w = ~w;
+               w = invert ? invert : ~invert;
        } else {
                XSetForeground(drw->dpy, drw->gc, drw->scheme[invert ? ColFg : ColBg].pixel);
                XFillRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w, h);
@@ -268,8 +280,9 @@ drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, unsigned int lp
        }
 
        usedfont = drw->fonts;
+       drw_font_getexts(usedfont, "...", 3, &ellipsis_width, NULL);
        while (1) {
-               utf8strlen = 0;
+               ew = ellipsis_len = utf8strlen = 0;
                utf8str = text;
                nextfont = NULL;
                while (*text) {
@@ -277,9 +290,27 @@ drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, unsigned int lp
                        for (curfont = drw->fonts; curfont; curfont = curfont->next) {
                                charexists = charexists || XftCharExists(drw->dpy, curfont->xfont, utf8codepoint);
                                if (charexists) {
-                                       if (curfont == usedfont) {
+                                       drw_font_getexts(curfont, text, utf8charlen, &tmpw, NULL);
+                                       if (ew + ellipsis_width <= w) {
+                                               /* keep track where the ellipsis still fits */
+                                               ellipsis_x = x + ew;
+                                               ellipsis_w = w - ew;
+                                               ellipsis_len = utf8strlen;
+                                       }
+
+                                       if (ew + tmpw > w) {
+                                               overflow = 1;
+                                               /* called from drw_fontset_getwidth_clamp():
+                                                * it wants the width AFTER the overflow
+                                                */
+                                               if (!render)
+                                                       x += tmpw;
+                                               else
+                                                       utf8strlen = ellipsis_len;
+                                       } else if (curfont == usedfont) {
                                                utf8strlen += utf8charlen;
                                                text += utf8charlen;
+                                               ew += tmpw;
                                        } else {
                                                nextfont = curfont;
                                        }
@@ -287,36 +318,25 @@ drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, unsigned int lp
                                }
                        }
 
-                       if (!charexists || nextfont)
+                       if (overflow || !charexists || nextfont)
                                break;
                        else
                                charexists = 0;
                }
 
                if (utf8strlen) {
-                       drw_font_getexts(usedfont, utf8str, utf8strlen, &ew, NULL);
-                       /* shorten text if necessary */
-                       for (len = MIN(utf8strlen, sizeof(buf) - 1); len && ew > w; len--)
-                               drw_font_getexts(usedfont, utf8str, len, &ew, NULL);
-
-                       if (len) {
-                               memcpy(buf, utf8str, len);
-                               buf[len] = '\0';
-                               if (len < utf8strlen)
-                                       for (i = len; i && i > len - 3; buf[--i] = '.')
-                                               ; /* NOP */
-
-                               if (render) {
-                                       ty = y + (h - usedfont->h) / 2 + usedfont->xfont->ascent;
-                                       XftDrawStringUtf8(d, &drw->scheme[invert ? ColBg : ColFg],
-                                                         usedfont->xfont, x, ty, (XftChar8 *)buf, len);
-                               }
-                               x += ew;
-                               w -= ew;
+                       if (render) {
+                               ty = y + (h - usedfont->h) / 2 + usedfont->xfont->ascent;
+                               XftDrawStringUtf8(d, &drw->scheme[invert ? ColBg : ColFg],
+                                                 usedfont->xfont, x, ty, (XftChar8 *)utf8str, utf8strlen);
                        }
+                       x += ew;
+                       w -= ew;
                }
+               if (render && overflow)
+                       drw_text(drw, ellipsis_x, y, ellipsis_w, h, 0, "...", invert);
 
-               if (!*text) {
+               if (!*text || overflow) {
                        break;
                } else if (nextfont) {
                        charexists = 0;
@@ -331,12 +351,13 @@ drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, unsigned int lp
 
                        if (!drw->fonts->pattern) {
                                /* Refer to the comment in xfont_create for more information. */
-                               die("the first font in the cache must be loaded from a font string.\n");
+                               die("the first font in the cache must be loaded from a font string.");
                        }
 
                        fcpattern = FcPatternDuplicate(drw->fonts->pattern);
                        FcPatternAddCharSet(fcpattern, FC_CHARSET, fccharset);
                        FcPatternAddBool(fcpattern, FC_SCALABLE, FcTrue);
+                       FcPatternAddBool(fcpattern, FC_COLOR, FcFalse);
 
                        FcConfigSubstitute(NULL, fcpattern, FcMatchPattern);
                        FcDefaultSubstitute(fcpattern);
@@ -382,6 +403,15 @@ drw_fontset_getwidth(Drw *drw, const char *text)
        return drw_text(drw, 0, 0, 0, 0, 0, text, 0);
 }
 
+unsigned int
+drw_fontset_getwidth_clamp(Drw *drw, const char *text, unsigned int n)
+{
+       unsigned int tmp = 0;
+       if (drw && drw->fonts && text && n)
+               tmp = drw_text(drw, 0, 0, 0, 0, 0, text, n);
+       return MIN(n, tmp);
+}
+
 void
 drw_font_getexts(Fnt *font, const char *text, unsigned int len, unsigned int *w, unsigned int *h)
 {