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-rw-r--r--drw.c190
1 files changed, 101 insertions, 89 deletions
diff --git a/drw.c b/drw.c
index 4cdbcbe..c41e6af 100644
--- a/drw.c
+++ b/drw.c
@@ -9,54 +9,40 @@
#include "util.h"
#define UTF_INVALID 0xFFFD
-#define UTF_SIZ 4
-static const unsigned char utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
-static const unsigned char utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
-static const long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
-static const long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
-
-static long
-utf8decodebyte(const char c, size_t *i)
-{
- for (*i = 0; *i < (UTF_SIZ + 1); ++(*i))
- if (((unsigned char)c & utfmask[*i]) == utfbyte[*i])
- return (unsigned char)c & ~utfmask[*i];
- return 0;
-}
-
-static size_t
-utf8validate(long *u, size_t i)
-{
- if (!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
- *u = UTF_INVALID;
- for (i = 1; *u > utfmax[i]; ++i)
- ;
- return i;
-}
-
-static size_t
-utf8decode(const char *c, long *u, size_t clen)
+static int
+utf8decode(const char *s_in, long *u, int *err)
{
- size_t i, j, len, type;
- long udecoded;
-
+ static const unsigned char lens[] = {
+ /* 0XXXX */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+ /* 10XXX */ 0, 0, 0, 0, 0, 0, 0, 0, /* invalid */
+ /* 110XX */ 2, 2, 2, 2,
+ /* 1110X */ 3, 3,
+ /* 11110 */ 4,
+ /* 11111 */ 0, /* invalid */
+ };
+ static const unsigned char leading_mask[] = { 0x7F, 0x1F, 0x0F, 0x07 };
+ static const unsigned int overlong[] = { 0x0, 0x80, 0x0800, 0x10000 };
+
+ const unsigned char *s = (const unsigned char *)s_in;
+ int len = lens[*s >> 3];
*u = UTF_INVALID;
- if (!clen)
- return 0;
- udecoded = utf8decodebyte(c[0], &len);
- if (!BETWEEN(len, 1, UTF_SIZ))
+ *err = 1;
+ if (len == 0)
return 1;
- for (i = 1, j = 1; i < clen && j < len; ++i, ++j) {
- udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
- if (type)
- return j;
+
+ long cp = s[0] & leading_mask[len - 1];
+ for (int i = 1; i < len; ++i) {
+ if (s[i] == '\0' || (s[i] & 0xC0) != 0x80)
+ return i;
+ cp = (cp << 6) | (s[i] & 0x3F);
}
- if (j < len)
- return 0;
- *u = udecoded;
- utf8validate(u, len);
+ /* out of range, surrogate, overlong encoding */
+ if (cp > 0x10FFFF || (cp >> 11) == 0x1B || cp < overlong[len - 1])
+ return len;
+ *err = 0;
+ *u = cp;
return len;
}
@@ -133,19 +119,6 @@ xfont_create(Drw *drw, const char *fontname, FcPattern *fontpattern)
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));
font->xfont = xfont;
font->pattern = pattern;
@@ -251,29 +224,32 @@ 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, hash, h0, h1;
XftDraw *d = NULL;
Fnt *usedfont, *curfont, *nextfont;
- size_t i, len;
- int utf8strlen, utf8charlen, render = x || y || w || h;
+ int utf8strlen, utf8charlen, utf8err, render = x || y || w || h;
long utf8codepoint = 0;
const char *utf8str;
FcCharSet *fccharset;
FcPattern *fcpattern;
FcPattern *match;
XftResult result;
- int charexists = 0;
+ int charexists = 0, overflow = 0;
+ /* keep track of a couple codepoints for which we have no match. */
+ static unsigned int nomatches[128], ellipsis_width, invalid_width;
+ static const char invalid[] = "�";
- if (!drw || (render && !drw->scheme) || !text || !drw->fonts)
+ if (!drw || (render && (!drw->scheme || !w)) || !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);
+ if (w < lpad)
+ return x + w;
d = XftDrawCreate(drw->dpy, drw->drawable,
DefaultVisual(drw->dpy, drw->screen),
DefaultColormap(drw->dpy, drw->screen));
@@ -282,18 +258,40 @@ drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, unsigned int lp
}
usedfont = drw->fonts;
+ if (!ellipsis_width && render)
+ ellipsis_width = drw_fontset_getwidth(drw, "...");
+ if (!invalid_width && render)
+ invalid_width = drw_fontset_getwidth(drw, invalid);
while (1) {
- utf8strlen = 0;
+ ew = ellipsis_len = utf8err = utf8charlen = utf8strlen = 0;
utf8str = text;
nextfont = NULL;
while (*text) {
- utf8charlen = utf8decode(text, &utf8codepoint, UTF_SIZ);
+ utf8charlen = utf8decode(text, &utf8codepoint, &utf8err);
for (curfont = drw->fonts; curfont; curfont = curfont->next) {
charexists = charexists || XftCharExists(drw->dpy, curfont->xfont, utf8codepoint);
if (charexists) {
- if (curfont == usedfont) {
- utf8strlen += utf8charlen;
+ 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) {
text += utf8charlen;
+ utf8strlen += utf8err ? 0 : utf8charlen;
+ ew += utf8err ? 0 : tmpw;
} else {
nextfont = curfont;
}
@@ -301,36 +299,31 @@ drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, unsigned int lp
}
}
- if (!charexists || nextfont)
+ if (overflow || !charexists || nextfont || utf8err)
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 (utf8err && (!render || invalid_width < w)) {
+ if (render)
+ drw_text(drw, x, y, w, h, 0, invalid, invert);
+ x += invalid_width;
+ w -= invalid_width;
+ }
+ 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;
@@ -340,6 +333,15 @@ drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, unsigned int lp
* character must be drawn. */
charexists = 1;
+ hash = (unsigned int)utf8codepoint;
+ hash = ((hash >> 16) ^ hash) * 0x21F0AAAD;
+ hash = ((hash >> 15) ^ hash) * 0xD35A2D97;
+ h0 = ((hash >> 15) ^ hash) % LENGTH(nomatches);
+ h1 = (hash >> 17) % LENGTH(nomatches);
+ /* avoid expensive XftFontMatch call when we know we won't find a match */
+ if (nomatches[h0] == utf8codepoint || nomatches[h1] == utf8codepoint)
+ goto no_match;
+
fccharset = FcCharSetCreate();
FcCharSetAddChar(fccharset, utf8codepoint);
@@ -351,7 +353,6 @@ drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, unsigned int lp
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);
@@ -368,6 +369,8 @@ drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, unsigned int lp
curfont->next = usedfont;
} else {
xfont_free(usedfont);
+ nomatches[nomatches[h0] ? h1 : h0] = utf8codepoint;
+no_match:
usedfont = drw->fonts;
}
}
@@ -397,6 +400,15 @@ 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)
{
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