436 lines
10 KiB
C
436 lines
10 KiB
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);
|
|
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.");
|
|
}
|
|
|
|
/* 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;
|
|
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)
|
|
{
|
|
char buf[1024];
|
|
int ty;
|
|
unsigned int ew;
|
|
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;
|
|
FcCharSet *fccharset;
|
|
FcPattern *fcpattern;
|
|
FcPattern *match;
|
|
XftResult result;
|
|
int charexists = 0;
|
|
|
|
if (!drw || (render && !drw->scheme) || !text || !drw->fonts)
|
|
return 0;
|
|
|
|
if (!render) {
|
|
w = ~w;
|
|
} 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;
|
|
while (1) {
|
|
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) {
|
|
if (curfont == usedfont) {
|
|
utf8strlen += utf8charlen;
|
|
text += utf8charlen;
|
|
} else {
|
|
nextfont = curfont;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!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 (!*text) {
|
|
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);
|
|
FcPatternAddBool(fcpattern, FC_COLOR, FcFalse);
|
|
|
|
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 + (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);
|
|
}
|
|
|
|
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);
|
|
}
|