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drw.c.rej
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drw.c.rej
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--- drw.c
+++ drw.c
@@ -364,6 +364,175 @@ drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, unsigned int lp
return x + (render ? w : 0);
}
+int
+utf8nextchar(const char *str, int len, int i, int inc)
+{
+ int n;
+
+ for (n = i + inc; n + inc >= 0 && n + inc <= len
+ && (str[n] & 0xc0) == 0x80; n += inc)
+ ;
+ return n;
+}
+
+int
+drw_text_align(Drw *drw, int x, int y, unsigned int w, unsigned int h, const char *text, int textlen, int align)
+{
+ int ty;
+ unsigned int ew;
+ XftDraw *d = NULL;
+ Fnt *usedfont, *curfont, *nextfont;
+ size_t len;
+ int utf8strlen, utf8charlen, render = x || y || w || h;
+ long utf8codepoint = 0;
+ const char *utf8str;
+ FcCharSet *fccharset;
+ FcPattern *fcpattern;
+ FcPattern *match;
+ XftResult result;
+ int charexists = 0;
+ int i, n;
+
+ if (!drw || (render && !drw->scheme) || !text || !drw->fonts || textlen <= 0
+ || (align != AlignL && align != AlignR))
+ return 0;
+
+ if (!render) {
+ w = ~w;
+ } else {
+ XSetForeground(drw->dpy, drw->gc, drw->scheme[ColBg].pixel);
+ XFillRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w, h);
+ d = XftDrawCreate(drw->dpy, drw->drawable,
+ DefaultVisual(drw->dpy, drw->screen),
+ DefaultColormap(drw->dpy, drw->screen));
+ }
+
+ usedfont = drw->fonts;
+ i = align == AlignL ? 0 : textlen;
+ x = align == AlignL ? x : x + w;
+ while (1) {
+ utf8strlen = 0;
+ nextfont = NULL;
+ /* if (align == AlignL) */
+ utf8str = text + i;
+
+ while ((align == AlignL && i < textlen) || (align == AlignR && i > 0)) {
+ if (align == AlignL) {
+ utf8charlen = utf8decode(text + i, &utf8codepoint, MIN(textlen - i, UTF_SIZ));
+ if (!utf8charlen) {
+ textlen = i;
+ break;
+ }
+ } else {
+ n = utf8nextchar(text, textlen, i, -1);
+ utf8charlen = utf8decode(text + n, &utf8codepoint, MIN(textlen - n, UTF_SIZ));
+ if (!utf8charlen) {
+ textlen -= i;
+ text += i;
+ i = 0;
+ break;
+ }
+ }
+ for (curfont = drw->fonts; curfont; curfont = curfont->next) {
+ charexists = charexists || XftCharExists(drw->dpy, curfont->xfont, utf8codepoint);
+ if (charexists) {
+ if (curfont == usedfont) {
+ utf8strlen += utf8charlen;
+ i += align == AlignL ? utf8charlen : -utf8charlen;
+ } else {
+ nextfont = curfont;
+ }
+ break;
+ }
+ }
+
+ if (!charexists || nextfont)
+ break;
+ else
+ charexists = 0;
+ }
+
+ if (align == AlignR)
+ utf8str = text + i;
+
+ if (utf8strlen) {
+ drw_font_getexts(usedfont, utf8str, utf8strlen, &ew, NULL);
+ /* shorten text if necessary */
+ if (align == AlignL) {
+ for (len = utf8strlen; len && ew > w; ) {
+ len = utf8nextchar(utf8str, len, len, -1);
+ drw_font_getexts(usedfont, utf8str, len, &ew, NULL);
+ }
+ } else {
+ for (len = utf8strlen; len && ew > w; ) {
+ n = utf8nextchar(utf8str, len, 0, +1);
+ utf8str += n;
+ len -= n;
+ drw_font_getexts(usedfont, utf8str, len, &ew, NULL);
+ }
+ }
+
+ if (len) {
+ if (render) {
+ ty = y + (h - usedfont->h) / 2 + usedfont->xfont->ascent;
+ XftDrawStringUtf8(d, &drw->scheme[ColFg],
+ usedfont->xfont, align == AlignL ? x : x - ew, ty, (XftChar8 *)utf8str, len);
+ }
+ x += align == AlignL ? ew : -ew;
+ w -= ew;
+ }
+ if (len < utf8strlen)
+ break;
+ }
+
+ if ((align == AlignR && i <= 0) || (align == AlignL && i >= textlen)) {
+ break;
+ } else if (nextfont) {
+ charexists = 0;
+ usedfont = nextfont;
+ } else {
+ /* Regardless of whether or not a fallback font is found, the
+ * character must be drawn. */
+ charexists = 1;
+
+ fccharset = FcCharSetCreate();
+ FcCharSetAddChar(fccharset, utf8codepoint);
+
+ 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.");
+ }
+
+ fcpattern = FcPatternDuplicate(drw->fonts->pattern);
+ FcPatternAddCharSet(fcpattern, FC_CHARSET, fccharset);
+ FcPatternAddBool(fcpattern, FC_SCALABLE, FcTrue);
+
+ FcConfigSubstitute(NULL, fcpattern, FcMatchPattern);
+ FcDefaultSubstitute(fcpattern);
+ match = XftFontMatch(drw->dpy, drw->screen, fcpattern, &result);
+
+ FcCharSetDestroy(fccharset);
+ FcPatternDestroy(fcpattern);
+
+ if (match) {
+ usedfont = xfont_create(drw, NULL, match);
+ if (usedfont && XftCharExists(drw->dpy, usedfont->xfont, utf8codepoint)) {
+ for (curfont = drw->fonts; curfont->next; curfont = curfont->next)
+ ; /* NOP */
+ curfont->next = usedfont;
+ } else {
+ xfont_free(usedfont);
+ usedfont = drw->fonts;
+ }
+ }
+ }
+ }
+ if (d)
+ XftDrawDestroy(d);
+
+ return x;
+}
+
void
drw_map(Drw *drw, Window win, int x, int y, unsigned int w, unsigned int h)
{