[dwm] / drw.c

/* 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
#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)
{
	size_t i, j, len, type;
	long udecoded;

	*u = UTF_INVALID;
	if (!clen)
		return 0;
	udecoded = utf8decodebyte(c[0], &len);
	if (!BETWEEN(len, 1, UTF_SIZ))
		return 1;
	for (i = 1, j = 1; i < clen && j < len; ++i, ++j) {
		udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
		if (type)
			return j;
	}
	if (j < len)
		return 0;
	*u = udecoded;
	utf8validate(u, len);

	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 i, ty, ellipsis_x = 0;
	unsigned int tmpw, ew, ellipsis_w = 0, ellipsis_len;
	XftDraw *d = NULL;
	Fnt *usedfont, *curfont, *nextfont;
	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, overflow = 0;
	/* keep track of a couple codepoints for which we have no match. */
	enum { nomatches_len = 64 };
	static struct { long codepoint[nomatches_len]; unsigned int idx; } nomatches;
	static unsigned int ellipsis_width = 0;

	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);
		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, "...");
	while (1) {
		ew = ellipsis_len = utf8strlen = 0;
		utf8str = text;
		nextfont = NULL;
		while (*text) {
			utf8charlen = utf8decode(text, &utf8codepoint, UTF_SIZ);
			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) {
						utf8strlen += utf8charlen;
						text += utf8charlen;
						ew += tmpw;
					} else {
						nextfont = curfont;
					}
					break;
				}
			}

			if (overflow || !charexists || nextfont)
				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 (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;

			for (i = 0; i < nomatches_len; ++i) {
				/* avoid calling XftFontMatch if we know we won't find a match */
				if (utf8codepoint == nomatches.codepoint[i])
					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.codepoint[++nomatches.idx % nomatches_len] = 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);
}
Commit	Line	Data
5715edf5 AT	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	#define UTF_SIZ 4
	13
	14	static const unsigned char utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
	15	static const unsigned char utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
	16	static const long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
	17	static const long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
	18
	19	static long
	20	utf8decodebyte(const char c, size_t *i)
	21	{
	22	for (i = 0; i < (UTF_SIZ + 1); ++(*i))
	23	if (((unsigned char)c & utfmask[i]) == utfbyte[i])
	24	return (unsigned char)c & ~utfmask[*i];
	25	return 0;
	26	}
	27
	28	static size_t
	29	utf8validate(long *u, size_t i)
	30	{
	31	if (!BETWEEN(u, utfmin[i], utfmax[i]) \|\| BETWEEN(u, 0xD800, 0xDFFF))
	32	*u = UTF_INVALID;
	33	for (i = 1; *u > utfmax[i]; ++i)
	34	;
	35	return i;
	36	}
	37
	38	static size_t
	39	utf8decode(const char c, long u, size_t clen)
	40	{
	41	size_t i, j, len, type;
	42	long udecoded;
	43
	44	*u = UTF_INVALID;
	45	if (!clen)
	46	return 0;
	47	udecoded = utf8decodebyte(c[0], &len);
	48	if (!BETWEEN(len, 1, UTF_SIZ))
	49	return 1;
	50	for (i = 1, j = 1; i < clen && j < len; ++i, ++j) {
	51	udecoded = (udecoded << 6) \| utf8decodebyte(c[i], &type);
	52	if (type)
	53	return j;
	54	}
	55	if (j < len)
	56	return 0;
	57	*u = udecoded;
	58	utf8validate(u, len);
	59
	60	return len;
	61	}
	62
	63	Drw *
	64	drw_create(Display *dpy, int screen, Window root, unsigned int w, unsigned int h)
65	{
66	Drw *drw = ecalloc(1, sizeof(Drw));
67
68	drw->dpy = dpy;
69	drw->screen = screen;
70	drw->root = root;
71	drw->w = w;
72	drw->h = h;
73	drw->drawable = XCreatePixmap(dpy, root, w, h, DefaultDepth(dpy, screen));
74	drw->gc = XCreateGC(dpy, root, 0, NULL);
75	XSetLineAttributes(dpy, drw->gc, 1, LineSolid, CapButt, JoinMiter);
76
77	return drw;
78	}
79
80	void
81	drw_resize(Drw *drw, unsigned int w, unsigned int h)
82	{
83	if (!drw)
84	return;
85
86	drw->w = w;
87	drw->h = h;
88	if (drw->drawable)
89	XFreePixmap(drw->dpy, drw->drawable);
90	drw->drawable = XCreatePixmap(drw->dpy, drw->root, w, h, DefaultDepth(drw->dpy, drw->screen));
91	}
92
93	void
94	drw_free(Drw *drw)
95	{
96	XFreePixmap(drw->dpy, drw->drawable);
97	XFreeGC(drw->dpy, drw->gc);
98	drw_fontset_free(drw->fonts);
99	free(drw);
100	}
101
102	/* This function is an implementation detail. Library users should use
103	* drw_fontset_create instead.
104	*/
105	static Fnt *
106	xfont_create(Drw drw, const char fontname, FcPattern *fontpattern)
107	{
108	Fnt *font;
109	XftFont *xfont = NULL;
110	FcPattern *pattern = NULL;
111
112	if (fontname) {
113	/* Using the pattern found at font->xfont->pattern does not yield the
114	* same substitution results as using the pattern returned by
115	* FcNameParse; using the latter results in the desired fallback
116	* behaviour whereas the former just results in missing-character
117	* rectangles being drawn, at least with some fonts. */
118	if (!(xfont = XftFontOpenName(drw->dpy, drw->screen, fontname))) {
119	fprintf(stderr, "error, cannot load font from name: '%s'\n", fontname);
120	return NULL;
121	}
122	if (!(pattern = FcNameParse((FcChar8 *) fontname))) {
123	fprintf(stderr, "error, cannot parse font name to pattern: '%s'\n", fontname);
124	XftFontClose(drw->dpy, xfont);
125	return NULL;
126	}
127	} else if (fontpattern) {
128	if (!(xfont = XftFontOpenPattern(drw->dpy, fontpattern))) {
129	fprintf(stderr, "error, cannot load font from pattern.\n");
130	return NULL;
131	}
132	} else {
133	die("no font specified.");
134	}
135
136	font = ecalloc(1, sizeof(Fnt));
137	font->xfont = xfont;
138	font->pattern = pattern;
139	font->h = xfont->ascent + xfont->descent;
140	font->dpy = drw->dpy;
141
142	return font;
143	}
144
145	static void
146	xfont_free(Fnt *font)
147	{
148	if (!font)
149	return;
150	if (font->pattern)
151	FcPatternDestroy(font->pattern);
152	XftFontClose(font->dpy, font->xfont);
153	free(font);
154	}
155
156	Fnt*
157	drw_fontset_create(Drw* drw, const char *fonts[], size_t fontcount)
158	{
159	Fnt cur, ret = NULL;
160	size_t i;
161
162	if (!drw \|\| !fonts)
163	return NULL;
164
165	for (i = 1; i <= fontcount; i++) {
166	if ((cur = xfont_create(drw, fonts[fontcount - i], NULL))) {
167	cur->next = ret;
168	ret = cur;
169	}
170	}
171	return (drw->fonts = ret);
172	}
173
174	void
175	drw_fontset_free(Fnt *font)
176	{
177	if (font) {
178	drw_fontset_free(font->next);
179	xfont_free(font);
180	}
181	}
182
183	void
184	drw_clr_create(Drw drw, Clr dest, const char *clrname)
185	{
186	if (!drw \|\| !dest \|\| !clrname)
187	return;
188
189	if (!XftColorAllocName(drw->dpy, DefaultVisual(drw->dpy, drw->screen),
190	DefaultColormap(drw->dpy, drw->screen),
191	clrname, dest))
192	die("error, cannot allocate color '%s'", clrname);
193	}
194
195	/* Wrapper to create color schemes. The caller has to call free(3) on the
196	* returned color scheme when done using it. */
197	Clr *
198	drw_scm_create(Drw drw, const char clrnames[], size_t clrcount)
199	{
200	size_t i;
201	Clr *ret;
202
203	/* need at least two colors for a scheme */
204	if (!drw \|\| !clrnames \|\| clrcount < 2 \|\| !(ret = ecalloc(clrcount, sizeof(XftColor))))
205	return NULL;
206
207	for (i = 0; i < clrcount; i++)
208	drw_clr_create(drw, &ret[i], clrnames[i]);
209	return ret;
210	}
211
212	void
213	drw_setfontset(Drw drw, Fnt set)
214	{
215	if (drw)
216	drw->fonts = set;
217	}
218
219	void
220	drw_setscheme(Drw drw, Clr scm)
221	{
222	if (drw)
223	drw->scheme = scm;
224	}
225
226	void
227	drw_rect(Drw *drw, int x, int y, unsigned int w, unsigned int h, int filled, int invert)
228	{
229	if (!drw \|\| !drw->scheme)
230	return;
231	XSetForeground(drw->dpy, drw->gc, invert ? drw->scheme[ColBg].pixel : drw->scheme[ColFg].pixel);
232	if (filled)
233	XFillRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w, h);
234	else
235	XDrawRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w - 1, h - 1);
236	}
237
238	int
239	drw_text(Drw drw, int x, int y, unsigned int w, unsigned int h, unsigned int lpad, const char text, int invert)
240	{
241	int i, ty, ellipsis_x = 0;
242	unsigned int tmpw, ew, ellipsis_w = 0, ellipsis_len;
243	XftDraw *d = NULL;
244	Fnt usedfont, curfont, *nextfont;
245	int utf8strlen, utf8charlen, render = x \|\| y \|\| w \|\| h;
246	long utf8codepoint = 0;
247	const char *utf8str;
248	FcCharSet *fccharset;
249	FcPattern *fcpattern;
250	FcPattern *match;
251	XftResult result;
252	int charexists = 0, overflow = 0;
253	/* keep track of a couple codepoints for which we have no match. */
254	enum { nomatches_len = 64 };
255	static struct { long codepoint[nomatches_len]; unsigned int idx; } nomatches;
256	static unsigned int ellipsis_width = 0;
257
258	if (!drw \|\| (render && (!drw->scheme \|\| !w)) \|\| !text \|\| !drw->fonts)
259	return 0;
260
261	if (!render) {
262	w = invert ? invert : ~invert;
263	} else {
264	XSetForeground(drw->dpy, drw->gc, drw->scheme[invert ? ColFg : ColBg].pixel);
265	XFillRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w, h);
266	d = XftDrawCreate(drw->dpy, drw->drawable,
267	DefaultVisual(drw->dpy, drw->screen),
268	DefaultColormap(drw->dpy, drw->screen));
269	x += lpad;
270	w -= lpad;
271	}
272
273	usedfont = drw->fonts;
274	if (!ellipsis_width && render)
275	ellipsis_width = drw_fontset_getwidth(drw, "...");
276	while (1) {
277	ew = ellipsis_len = utf8strlen = 0;
278	utf8str = text;
279	nextfont = NULL;
280	while (*text) {
281	utf8charlen = utf8decode(text, &utf8codepoint, UTF_SIZ);
282	for (curfont = drw->fonts; curfont; curfont = curfont->next) {
283	charexists = charexists \|\| XftCharExists(drw->dpy, curfont->xfont, utf8codepoint);
284	if (charexists) {
285	drw_font_getexts(curfont, text, utf8charlen, &tmpw, NULL);
286	if (ew + ellipsis_width <= w) {
287	/* keep track where the ellipsis still fits */
288	ellipsis_x = x + ew;
289	ellipsis_w = w - ew;
290	ellipsis_len = utf8strlen;
291	}
292
293	if (ew + tmpw > w) {
294	overflow = 1;
295	/* called from drw_fontset_getwidth_clamp():
296	* it wants the width AFTER the overflow
297	*/
298	if (!render)
299	x += tmpw;
300	else
301	utf8strlen = ellipsis_len;
302	} else if (curfont == usedfont) {
303	utf8strlen += utf8charlen;
304	text += utf8charlen;
305	ew += tmpw;
306	} else {
307	nextfont = curfont;
308	}
309	break;
310	}
311	}
312
313	if (overflow \|\| !charexists \|\| nextfont)
314	break;
315	else
316	charexists = 0;
317	}
318
319	if (utf8strlen) {
320	if (render) {
321	ty = y + (h - usedfont->h) / 2 + usedfont->xfont->ascent;
322	XftDrawStringUtf8(d, &drw->scheme[invert ? ColBg : ColFg],
323	usedfont->xfont, x, ty, (XftChar8 *)utf8str, utf8strlen);
324	}
325	x += ew;
326	w -= ew;
327	}
328	if (render && overflow)
329	drw_text(drw, ellipsis_x, y, ellipsis_w, h, 0, "...", invert);
330
331	if (!*text \|\| overflow) {
332	break;
333	} else if (nextfont) {
334	charexists = 0;
335	usedfont = nextfont;
336	} else {
337	/* Regardless of whether or not a fallback font is found, the
338	* character must be drawn. */
339	charexists = 1;
340
341	for (i = 0; i < nomatches_len; ++i) {
342	/* avoid calling XftFontMatch if we know we won't find a match */
343	if (utf8codepoint == nomatches.codepoint[i])
344	goto no_match;
345	}
346
347	fccharset = FcCharSetCreate();
348	FcCharSetAddChar(fccharset, utf8codepoint);
349
350	if (!drw->fonts->pattern) {
351	/* Refer to the comment in xfont_create for more information. */
352	die("the first font in the cache must be loaded from a font string.");
353	}
354
355	fcpattern = FcPatternDuplicate(drw->fonts->pattern);
356	FcPatternAddCharSet(fcpattern, FC_CHARSET, fccharset);
357	FcPatternAddBool(fcpattern, FC_SCALABLE, FcTrue);
358
359	FcConfigSubstitute(NULL, fcpattern, FcMatchPattern);
360	FcDefaultSubstitute(fcpattern);
361	match = XftFontMatch(drw->dpy, drw->screen, fcpattern, &result);
362
363	FcCharSetDestroy(fccharset);
364	FcPatternDestroy(fcpattern);
365
366	if (match) {
367	usedfont = xfont_create(drw, NULL, match);
368	if (usedfont && XftCharExists(drw->dpy, usedfont->xfont, utf8codepoint)) {
369	for (curfont = drw->fonts; curfont->next; curfont = curfont->next)
370	; /* NOP */
371	curfont->next = usedfont;
372	} else {
373	xfont_free(usedfont);
374	nomatches.codepoint[++nomatches.idx % nomatches_len] = utf8codepoint;
375	no_match:
376	usedfont = drw->fonts;
377	}
378	}
379	}
380	}
381	if (d)
382	XftDrawDestroy(d);
383
384	return x + (render ? w : 0);
385	}
386
387	void
388	drw_map(Drw *drw, Window win, int x, int y, unsigned int w, unsigned int h)
389	{
390	if (!drw)
391	return;
392
393	XCopyArea(drw->dpy, drw->drawable, win, drw->gc, x, y, w, h, x, y);
394	XSync(drw->dpy, False);
395	}
396
397	unsigned int
398	drw_fontset_getwidth(Drw drw, const char text)
399	{
400	if (!drw \|\| !drw->fonts \|\| !text)
401	return 0;
402	return drw_text(drw, 0, 0, 0, 0, 0, text, 0);
403	}
404
405	unsigned int
406	drw_fontset_getwidth_clamp(Drw drw, const char text, unsigned int n)
407	{
408	unsigned int tmp = 0;
409	if (drw && drw->fonts && text && n)
410	tmp = drw_text(drw, 0, 0, 0, 0, 0, text, n);
411	return MIN(n, tmp);
412	}
413
414	void
415	drw_font_getexts(Fnt font, const char text, unsigned int len, unsigned int w, unsigned int h)
416	{
417	XGlyphInfo ext;
418
419	if (!font \|\| !text)
420	return;
421
422	XftTextExtentsUtf8(font->dpy, font->xfont, (XftChar8 *)text, len, &ext);
423	if (w)
424	*w = ext.xOff;
425	if (h)
426	*h = font->h;
427	}
428
429	Cur *
430	drw_cur_create(Drw *drw, int shape)
431	{
432	Cur *cur;
433
434	if (!drw \|\| !(cur = ecalloc(1, sizeof(Cur))))
435	return NULL;
436
437	cur->cursor = XCreateFontCursor(drw->dpy, shape);
438
439	return cur;
440	}
441
442	void
443	drw_cur_free(Drw drw, Cur cursor)
444	{
445	if (!cursor)
446	return;
447
448	XFreeCursor(drw->dpy, cursor->cursor);
449	free(cursor);
450	}