nixos-dotfiles

https://git.tonybtw.com/nixos-dotfiles.git git://git.tonybtw.com/nixos-dotfiles.git

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/* See LICENSE file for copyright and license details. */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <X11/Xlib.h>
#include <X11/Xft/Xft.h>

#include "drw.h"
#include "util.h"

#define UTF_INVALID 0xFFFD

static int
utf8decode(const char *s_in, long *u, int *err)
{
	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;
	*err = 1;
	if (len == 0)
		return 1;

	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);
	}
	/* out of range, surrogate, overlong encoding */
	if (cp > 0x10FFFF || (cp >> 11) == 0x1B || cp < overlong[len - 1])
		return len;

	*err = 0;
	*u = cp;
	return len;
}

Drw *
drw_create(Display *dpy, int screen, Window root, unsigned int w, unsigned int h)
{
	Drw *drw = ecalloc(1, sizeof(Drw));

	drw->dpy = dpy;
	drw->screen = screen;
	drw->root = root;
	drw->w = w;
	drw->h = h;
	drw->drawable = XCreatePixmap(dpy, root, w, h, DefaultDepth(dpy, screen));
	drw->gc = XCreateGC(dpy, root, 0, NULL);
	XSetLineAttributes(dpy, drw->gc, 1, LineSolid, CapButt, JoinMiter);

	return drw;
}

void
drw_resize(Drw *drw, unsigned int w, unsigned int h)
{
	if (!drw)
		return;

	drw->w = w;
	drw->h = h;
	if (drw->drawable)
		XFreePixmap(drw->dpy, drw->drawable);
	drw->drawable = XCreatePixmap(drw->dpy, drw->root, w, h, DefaultDepth(drw->dpy, drw->screen));
}

void
drw_free(Drw *drw)
{
	XFreePixmap(drw->dpy, drw->drawable);
	XFreeGC(drw->dpy, drw->gc);
	drw_fontset_free(drw->fonts);
	free(drw);
}

/* This function is an implementation detail. Library users should use
 * drw_fontset_create instead.
 */
static Fnt *
xfont_create(Drw *drw, const char *fontname, FcPattern *fontpattern)
{
	Fnt *font;
	XftFont *xfont = NULL;
	FcPattern *pattern = NULL;

	if (fontname) {
		/* Using the pattern found at font->xfont->pattern does not yield the
		 * same substitution results as using the pattern returned by
		 * FcNameParse; using the latter results in the desired fallback
		 * behaviour whereas the former just results in missing-character
		 * rectangles being drawn, at least with some fonts. */
		if (!(xfont = XftFontOpenName(drw->dpy, drw->screen, fontname))) {
			fprintf(stderr, "error, cannot load font from name: '%s'\n", fontname);
			return NULL;
		}
		if (!(pattern = FcNameParse((FcChar8 *) fontname))) {
			fprintf(stderr, "error, cannot parse font name to pattern: '%s'\n", fontname);
			XftFontClose(drw->dpy, xfont);
			return NULL;
		}
	} else if (fontpattern) {
		if (!(xfont = XftFontOpenPattern(drw->dpy, fontpattern))) {
			fprintf(stderr, "error, cannot load font from pattern.\n");
			return NULL;
		}
	} else {
		die("no font specified.");
	}

	font = ecalloc(1, sizeof(Fnt));
	font->xfont = xfont;
	font->pattern = pattern;
	font->h = xfont->ascent + xfont->descent;
	font->dpy = drw->dpy;

	return font;
}

static void
xfont_free(Fnt *font)
{
	if (!font)
		return;
	if (font->pattern)
		FcPatternDestroy(font->pattern);
	XftFontClose(font->dpy, font->xfont);
	free(font);
}

Fnt*
drw_fontset_create(Drw* drw, const char *fonts[], size_t fontcount)
{
	Fnt *cur, *ret = NULL;
	size_t i;

	if (!drw || !fonts)
		return NULL;

	for (i = 1; i <= fontcount; i++) {
		if ((cur = xfont_create(drw, fonts[fontcount - i], NULL))) {
			cur->next = ret;
			ret = cur;
		}
	}
	return (drw->fonts = ret);
}

void
drw_fontset_free(Fnt *font)
{
	if (font) {
		drw_fontset_free(font->next);
		xfont_free(font);
	}
}

void
drw_clr_create(Drw *drw, Clr *dest, const char *clrname)
{
	if (!drw || !dest || !clrname)
		return;

	if (!XftColorAllocName(drw->dpy, DefaultVisual(drw->dpy, drw->screen),
	                       DefaultColormap(drw->dpy, drw->screen),
	                       clrname, dest))
		die("error, cannot allocate color '%s'", clrname);
}

/* Wrapper to create color schemes. The caller has to call free(3) on the
 * returned color scheme when done using it. */
Clr *
drw_scm_create(Drw *drw, const char *clrnames[], size_t clrcount)
{
	size_t i;
	Clr *ret;

	/* need at least two colors for a scheme */
	if (!drw || !clrnames || clrcount < 2 || !(ret = ecalloc(clrcount, sizeof(XftColor))))
		return NULL;

	for (i = 0; i < clrcount; i++)
		drw_clr_create(drw, &ret[i], clrnames[i]);
	return ret;
}

void
drw_setfontset(Drw *drw, Fnt *set)
{
	if (drw)
		drw->fonts = set;
}

void
drw_setscheme(Drw *drw, Clr *scm)
{
	if (drw)
		drw->scheme = scm;
}

void
drw_rect(Drw *drw, int x, int y, unsigned int w, unsigned int h, int filled, int invert)
{
	if (!drw || !drw->scheme)
		return;
	XSetForeground(drw->dpy, drw->gc, invert ? drw->scheme[ColBg].pixel : drw->scheme[ColFg].pixel);
	if (filled)
		XFillRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w, h);
	else
		XDrawRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w - 1, h - 1);
}

int
drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, unsigned int lpad, const char *text, int invert)
{
	int ty, ellipsis_x = 0;
	unsigned int tmpw, ew, ellipsis_w = 0, ellipsis_len, hash, h0, h1;
	XftDraw *d = NULL;
	Fnt *usedfont, *curfont, *nextfont;
	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, 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 || !w)) || !text || !drw->fonts)
		return 0;

	if (!render) {
		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));
		x += lpad;
		w -= lpad;
	}

	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) {
		ew = ellipsis_len = utf8err = utf8charlen = utf8strlen = 0;
		utf8str = text;
		nextfont = NULL;
		while (*text) {
			utf8charlen = utf8decode(text, &utf8codepoint, &utf8err);
			for (curfont = drw->fonts; curfont; curfont = curfont->next) {
				charexists = charexists || XftCharExists(drw->dpy, curfont->xfont, utf8codepoint);
				if (charexists) {
					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;
					}
					break;
				}
			}

			if (overflow || !charexists || nextfont || utf8err)
				break;
			else
				charexists = 0;
		}

		if (utf8strlen) {
			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 || overflow) {
			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;

			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);

			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);
					nomatches[nomatches[h0] ? h1 : h0] = utf8codepoint;
no_match:
					usedfont = drw->fonts;
				}
			}
		}
	}
	if (d)
		XftDrawDestroy(d);

	return x + (render ? w : 0);
}

void
drw_map(Drw *drw, Window win, int x, int y, unsigned int w, unsigned int h)
{
	if (!drw)
		return;

	XCopyArea(drw->dpy, drw->drawable, win, drw->gc, x, y, w, h, x, y);
	XSync(drw->dpy, False);
}

unsigned int
drw_fontset_getwidth(Drw *drw, const char *text)
{
	if (!drw || !drw->fonts || !text)
		return 0;
	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)
{
	XGlyphInfo ext;

	if (!font || !text)
		return;

	XftTextExtentsUtf8(font->dpy, font->xfont, (XftChar8 *)text, len, &ext);
	if (w)
		*w = ext.xOff;
	if (h)
		*h = font->h;
}

Cur *
drw_cur_create(Drw *drw, int shape)
{
	Cur *cur;

	if (!drw || !(cur = ecalloc(1, sizeof(Cur))))
		return NULL;

	cur->cursor = XCreateFontCursor(drw->dpy, shape);

	return cur;
}

void
drw_cur_free(Drw *drw, Cur *cursor)
{
	if (!cursor)
		return;

	XFreeCursor(drw->dpy, cursor->cursor);
	free(cursor);
}

1	`/* See LICENSE file for copyright and license details. */`
2	`#include <stdio.h>`
3	`#include <stdlib.h>`
4	`#include <string.h>`
5	`#include <X11/Xlib.h>`
6	`#include <X11/Xft/Xft.h>`
7
8	`#include "drw.h"`
9	`#include "util.h"`
10
11	`#define UTF_INVALID 0xFFFD`
12
13	`static int`
14	`utf8decode(const char s_in, long u, int *err)`
15	`{`
16	`static const unsigned char lens[] = {`
17	`/* 0XXXX */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,`
18	`/* 10XXX / 0, 0, 0, 0, 0, 0, 0, 0, / invalid */`
19	`/* 110XX */ 2, 2, 2, 2,`
20	`/* 1110X */ 3, 3,`
21	`/* 11110 */ 4,`
22	`/* 11111 / 0, / invalid */`
23	`};`
24	`static const unsigned char leading_mask[] = { 0x7F, 0x1F, 0x0F, 0x07 };`
25	`static const unsigned int overlong[] = { 0x0, 0x80, 0x0800, 0x10000 };`
26
27	`const unsigned char s = (const unsigned char )s_in;`
28	`int len = lens[*s >> 3];`
29	`*u = UTF_INVALID;`
30	`*err = 1;`
31	`if (len == 0)`
32	`return 1;`
33
34	`long cp = s[0] & leading_mask[len - 1];`
35	`for (int i = 1; i < len; ++i) {`
36	`if (s[i] == '\0' \|\| (s[i] & 0xC0) != 0x80)`
37	`return i;`
38	`cp = (cp << 6) \| (s[i] & 0x3F);`
39	`}`
40	`/* out of range, surrogate, overlong encoding */`
41	`if (cp > 0x10FFFF \|\| (cp >> 11) == 0x1B \|\| cp < overlong[len - 1])`
42	`return len;`
43
44	`*err = 0;`
45	`*u = cp;`
46	`return len;`
47	`}`
48
49	`Drw *`
50	`drw_create(Display *dpy, int screen, Window root, unsigned int w, unsigned int h)`
51	`{`
52	`Drw *drw = ecalloc(1, sizeof(Drw));`
53
54	`drw->dpy = dpy;`
55	`drw->screen = screen;`
56	`drw->root = root;`
57	`drw->w = w;`
58	`drw->h = h;`
59	`drw->drawable = XCreatePixmap(dpy, root, w, h, DefaultDepth(dpy, screen));`
60	`drw->gc = XCreateGC(dpy, root, 0, NULL);`
61	`XSetLineAttributes(dpy, drw->gc, 1, LineSolid, CapButt, JoinMiter);`
62
63	`return drw;`
64	`}`
65
66	`void`
67	`drw_resize(Drw *drw, unsigned int w, unsigned int h)`
68	`{`
69	`if (!drw)`
70	`return;`
71
72	`drw->w = w;`
73	`drw->h = h;`
74	`if (drw->drawable)`
75	`XFreePixmap(drw->dpy, drw->drawable);`
76	`drw->drawable = XCreatePixmap(drw->dpy, drw->root, w, h, DefaultDepth(drw->dpy, drw->screen));`
77	`}`
78
79	`void`
80	`drw_free(Drw *drw)`
81	`{`
82	`XFreePixmap(drw->dpy, drw->drawable);`
83	`XFreeGC(drw->dpy, drw->gc);`
84	`drw_fontset_free(drw->fonts);`
85	`free(drw);`
86	`}`
87
88	`/* This function is an implementation detail. Library users should use`
89	`* drw_fontset_create instead.`
90	`*/`
91	`static Fnt *`
92	`xfont_create(Drw drw, const char fontname, FcPattern *fontpattern)`
93	`{`
94	`Fnt *font;`
95	`XftFont *xfont = NULL;`
96	`FcPattern *pattern = NULL;`
97
98	`if (fontname) {`
99	`/* Using the pattern found at font->xfont->pattern does not yield the`
100	`* same substitution results as using the pattern returned by`
101	`* FcNameParse; using the latter results in the desired fallback`
102	`* behaviour whereas the former just results in missing-character`
103	`* rectangles being drawn, at least with some fonts. */`
104	`if (!(xfont = XftFontOpenName(drw->dpy, drw->screen, fontname))) {`
105	`fprintf(stderr, "error, cannot load font from name: '%s'\n", fontname);`
106	`return NULL;`
107	`}`
108	`if (!(pattern = FcNameParse((FcChar8 *) fontname))) {`
109	`fprintf(stderr, "error, cannot parse font name to pattern: '%s'\n", fontname);`
110	`XftFontClose(drw->dpy, xfont);`
111	`return NULL;`
112	`}`
113	`} else if (fontpattern) {`
114	`if (!(xfont = XftFontOpenPattern(drw->dpy, fontpattern))) {`
115	`fprintf(stderr, "error, cannot load font from pattern.\n");`
116	`return NULL;`
117	`}`
118	`} else {`
119	`die("no font specified.");`
120	`}`
121
122	`font = ecalloc(1, sizeof(Fnt));`
123	`font->xfont = xfont;`
124	`font->pattern = pattern;`
125	`font->h = xfont->ascent + xfont->descent;`
126	`font->dpy = drw->dpy;`
127
128	`return font;`
129	`}`
130
131	`static void`
132	`xfont_free(Fnt *font)`
133	`{`
134	`if (!font)`
135	`return;`
136	`if (font->pattern)`
137	`FcPatternDestroy(font->pattern);`
138	`XftFontClose(font->dpy, font->xfont);`
139	`free(font);`
140	`}`
141
142	`Fnt*`
143	`drw_fontset_create(Drw* drw, const char *fonts[], size_t fontcount)`
144	`{`
145	`Fnt cur, ret = NULL;`
146	`size_t i;`
147
148	`if (!drw \|\| !fonts)`
149	`return NULL;`
150
151	`for (i = 1; i <= fontcount; i++) {`
152	`if ((cur = xfont_create(drw, fonts[fontcount - i], NULL))) {`
153	`cur->next = ret;`
154	`ret = cur;`
155	`}`
156	`}`
157	`return (drw->fonts = ret);`
158	`}`
159
160	`void`
161	`drw_fontset_free(Fnt *font)`
162	`{`
163	`if (font) {`
164	`drw_fontset_free(font->next);`
165	`xfont_free(font);`
166	`}`
167	`}`
168
169	`void`
170	`drw_clr_create(Drw drw, Clr dest, const char *clrname)`
171	`{`
172	`if (!drw \|\| !dest \|\| !clrname)`
173	`return;`
174
175	`if (!XftColorAllocName(drw->dpy, DefaultVisual(drw->dpy, drw->screen),`
176	`DefaultColormap(drw->dpy, drw->screen),`
177	`clrname, dest))`
178	`die("error, cannot allocate color '%s'", clrname);`
179	`}`
180
181	`/* Wrapper to create color schemes. The caller has to call free(3) on the`
182	`* returned color scheme when done using it. */`
183	`Clr *`
184	`drw_scm_create(Drw drw, const char clrnames[], size_t clrcount)`
185	`{`
186	`size_t i;`
187	`Clr *ret;`
188
189	`/* need at least two colors for a scheme */`
190	`if (!drw \|\| !clrnames \|\| clrcount < 2 \|\| !(ret = ecalloc(clrcount, sizeof(XftColor))))`
191	`return NULL;`
192
193	`for (i = 0; i < clrcount; i++)`
194	`drw_clr_create(drw, &ret[i], clrnames[i]);`
195	`return ret;`
196	`}`
197
198	`void`
199	`drw_setfontset(Drw drw, Fnt set)`
200	`{`
201	`if (drw)`
202	`drw->fonts = set;`
203	`}`
204
205	`void`
206	`drw_setscheme(Drw drw, Clr scm)`
207	`{`
208	`if (drw)`
209	`drw->scheme = scm;`
210	`}`
211
212	`void`
213	`drw_rect(Drw *drw, int x, int y, unsigned int w, unsigned int h, int filled, int invert)`
214	`{`
215	`if (!drw \|\| !drw->scheme)`
216	`return;`
217	`XSetForeground(drw->dpy, drw->gc, invert ? drw->scheme[ColBg].pixel : drw->scheme[ColFg].pixel);`
218	`if (filled)`
219	`XFillRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w, h);`
220	`else`
221	`XDrawRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w - 1, h - 1);`
222	`}`
223
224	`int`
225	`drw_text(Drw drw, int x, int y, unsigned int w, unsigned int h, unsigned int lpad, const char text, int invert)`
226	`{`
227	`int ty, ellipsis_x = 0;`
228	`unsigned int tmpw, ew, ellipsis_w = 0, ellipsis_len, hash, h0, h1;`
229	`XftDraw *d = NULL;`
230	`Fnt usedfont, curfont, *nextfont;`
231	`int utf8strlen, utf8charlen, utf8err, render = x \|\| y \|\| w \|\| h;`
232	`long utf8codepoint = 0;`
233	`const char *utf8str;`
234	`FcCharSet *fccharset;`
235	`FcPattern *fcpattern;`
236	`FcPattern *match;`
237	`XftResult result;`
238	`int charexists = 0, overflow = 0;`
239	`/* keep track of a couple codepoints for which we have no match. */`
240	`static unsigned int nomatches[128], ellipsis_width, invalid_width;`
241	`static const char invalid[] = "�";`
242
243	`if (!drw \|\| (render && (!drw->scheme \|\| !w)) \|\| !text \|\| !drw->fonts)`
244	`return 0;`
245
246	`if (!render) {`
247	`w = invert ? invert : ~invert;`
248	`} else {`
249	`XSetForeground(drw->dpy, drw->gc, drw->scheme[invert ? ColFg : ColBg].pixel);`
250	`XFillRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w, h);`
251	`if (w < lpad)`
252	`return x + w;`
253	`d = XftDrawCreate(drw->dpy, drw->drawable,`
254	`DefaultVisual(drw->dpy, drw->screen),`
255	`DefaultColormap(drw->dpy, drw->screen));`
256	`x += lpad;`
257	`w -= lpad;`
258	`}`
259
260	`usedfont = drw->fonts;`
261	`if (!ellipsis_width && render)`
262	`ellipsis_width = drw_fontset_getwidth(drw, "...");`
263	`if (!invalid_width && render)`
264	`invalid_width = drw_fontset_getwidth(drw, invalid);`
265	`while (1) {`
266	`ew = ellipsis_len = utf8err = utf8charlen = utf8strlen = 0;`
267	`utf8str = text;`
268	`nextfont = NULL;`
269	`while (*text) {`
270	`utf8charlen = utf8decode(text, &utf8codepoint, &utf8err);`
271	`for (curfont = drw->fonts; curfont; curfont = curfont->next) {`
272	`charexists = charexists \|\| XftCharExists(drw->dpy, curfont->xfont, utf8codepoint);`
273	`if (charexists) {`
274	`drw_font_getexts(curfont, text, utf8charlen, &tmpw, NULL);`
275	`if (ew + ellipsis_width <= w) {`
276	`/* keep track where the ellipsis still fits */`
277	`ellipsis_x = x + ew;`
278	`ellipsis_w = w - ew;`
279	`ellipsis_len = utf8strlen;`
280	`}`
281
282	`if (ew + tmpw > w) {`
283	`overflow = 1;`
284	`/* called from drw_fontset_getwidth_clamp():`
285	`* it wants the width AFTER the overflow`
286	`*/`
287	`if (!render)`
288	`x += tmpw;`
289	`else`
290	`utf8strlen = ellipsis_len;`
291	`} else if (curfont == usedfont) {`
292	`text += utf8charlen;`
293	`utf8strlen += utf8err ? 0 : utf8charlen;`
294	`ew += utf8err ? 0 : tmpw;`
295	`} else {`
296	`nextfont = curfont;`
297	`}`
298	`break;`
299	`}`
300	`}`
301
302	`if (overflow \|\| !charexists \|\| nextfont \|\| utf8err)`
303	`break;`
304	`else`
305	`charexists = 0;`
306	`}`
307
308	`if (utf8strlen) {`
309	`if (render) {`
310	`ty = y + (h - usedfont->h) / 2 + usedfont->xfont->ascent;`
311	`XftDrawStringUtf8(d, &drw->scheme[invert ? ColBg : ColFg],`
312	`usedfont->xfont, x, ty, (XftChar8 *)utf8str, utf8strlen);`
313	`}`
314	`x += ew;`
315	`w -= ew;`
316	`}`
317	`if (utf8err && (!render \|\| invalid_width < w)) {`
318	`if (render)`
319	`drw_text(drw, x, y, w, h, 0, invalid, invert);`
320	`x += invalid_width;`
321	`w -= invalid_width;`
322	`}`
323	`if (render && overflow)`
324	`drw_text(drw, ellipsis_x, y, ellipsis_w, h, 0, "...", invert);`
325
326	`if (!*text \|\| overflow) {`
327	`break;`
328	`} else if (nextfont) {`
329	`charexists = 0;`
330	`usedfont = nextfont;`
331	`} else {`
332	`/* Regardless of whether or not a fallback font is found, the`
333	`* character must be drawn. */`
334	`charexists = 1;`
335
336	`hash = (unsigned int)utf8codepoint;`
337	`hash = ((hash >> 16) ^ hash) * 0x21F0AAAD;`
338	`hash = ((hash >> 15) ^ hash) * 0xD35A2D97;`
339	`h0 = ((hash >> 15) ^ hash) % LENGTH(nomatches);`
340	`h1 = (hash >> 17) % LENGTH(nomatches);`
341	`/* avoid expensive XftFontMatch call when we know we won't find a match */`
342	`if (nomatches[h0] == utf8codepoint \|\| nomatches[h1] == utf8codepoint)`
343	`goto no_match;`
344
345	`fccharset = FcCharSetCreate();`
346	`FcCharSetAddChar(fccharset, utf8codepoint);`
347
348	`if (!drw->fonts->pattern) {`
349	`/* Refer to the comment in xfont_create for more information. */`
350	`die("the first font in the cache must be loaded from a font string.");`
351	`}`
352
353	`fcpattern = FcPatternDuplicate(drw->fonts->pattern);`
354	`FcPatternAddCharSet(fcpattern, FC_CHARSET, fccharset);`
355	`FcPatternAddBool(fcpattern, FC_SCALABLE, FcTrue);`
356
357	`FcConfigSubstitute(NULL, fcpattern, FcMatchPattern);`
358	`FcDefaultSubstitute(fcpattern);`
359	`match = XftFontMatch(drw->dpy, drw->screen, fcpattern, &result);`
360
361	`FcCharSetDestroy(fccharset);`
362	`FcPatternDestroy(fcpattern);`
363
364	`if (match) {`
365	`usedfont = xfont_create(drw, NULL, match);`
366	`if (usedfont && XftCharExists(drw->dpy, usedfont->xfont, utf8codepoint)) {`
367	`for (curfont = drw->fonts; curfont->next; curfont = curfont->next)`
368	`; /* NOP */`
369	`curfont->next = usedfont;`
370	`} else {`
371	`xfont_free(usedfont);`
372	`nomatches[nomatches[h0] ? h1 : h0] = utf8codepoint;`
373	`no_match:`
374	`usedfont = drw->fonts;`
375	`}`
376	`}`
377	`}`
378	`}`
379	`if (d)`
380	`XftDrawDestroy(d);`
381
382	`return x + (render ? w : 0);`
383	`}`
384
385	`void`
386	`drw_map(Drw *drw, Window win, int x, int y, unsigned int w, unsigned int h)`
387	`{`
388	`if (!drw)`
389	`return;`
390
391	`XCopyArea(drw->dpy, drw->drawable, win, drw->gc, x, y, w, h, x, y);`
392	`XSync(drw->dpy, False);`
393	`}`
394
395	`unsigned int`
396	`drw_fontset_getwidth(Drw drw, const char text)`
397	`{`
398	`if (!drw \|\| !drw->fonts \|\| !text)`
399	`return 0;`
400	`return drw_text(drw, 0, 0, 0, 0, 0, text, 0);`
401	`}`
402
403	`unsigned int`
404	`drw_fontset_getwidth_clamp(Drw drw, const char text, unsigned int n)`
405	`{`
406	`unsigned int tmp = 0;`
407	`if (drw && drw->fonts && text && n)`
408	`tmp = drw_text(drw, 0, 0, 0, 0, 0, text, n);`
409	`return MIN(n, tmp);`
410	`}`
411
412	`void`
413	`drw_font_getexts(Fnt font, const char text, unsigned int len, unsigned int w, unsigned int h)`
414	`{`
415	`XGlyphInfo ext;`
416
417	`if (!font \|\| !text)`
418	`return;`
419
420	`XftTextExtentsUtf8(font->dpy, font->xfont, (XftChar8 *)text, len, &ext);`
421	`if (w)`
422	`*w = ext.xOff;`
423	`if (h)`
424	`*h = font->h;`
425	`}`
426
427	`Cur *`
428	`drw_cur_create(Drw *drw, int shape)`
429	`{`
430	`Cur *cur;`
431
432	`if (!drw \|\| !(cur = ecalloc(1, sizeof(Cur))))`
433	`return NULL;`
434
435	`cur->cursor = XCreateFontCursor(drw->dpy, shape);`
436
437	`return cur;`
438	`}`
439
440	`void`
441	`drw_cur_free(Drw drw, Cur cursor)`
442	`{`
443	`if (!cursor)`
444	`return;`
445
446	`XFreeCursor(drw->dpy, cursor->cursor);`
447	`free(cursor);`
448	`}`