8933ebcf50
- drw: minor improvement to the nomatches cache - overhaul utf8decoding and render invalid utf8 sequences as U+FFFD. Thanks NRK for these improvements!
447 lines
11 KiB
C
447 lines
11 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
|
||
|
||
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[] = "<EFBFBD>";
|
||
|
||
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, "...");
|
||
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);
|
||
}
|