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dwm-flexipatch/drw.c

754 lines
19 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 "patches.h"
#include "drw.h"
#include "util.h"
#if BIDI_PATCH
#include <fribidi.h>
static char fribidi_text[BUFSIZ] = "";
static void
apply_fribidi(const char *str)
{
FriBidiStrIndex len = strlen(str);
FriBidiChar logical[BUFSIZ];
FriBidiChar visual[BUFSIZ];
FriBidiParType base = FRIBIDI_PAR_ON;
FriBidiCharSet charset;
fribidi_text[0] = 0;
if (len > 0) {
charset = fribidi_parse_charset("UTF-8");
len = fribidi_charset_to_unicode(charset, str, len, logical);
fribidi_log2vis(logical, len, &base, visual, NULL, NULL, NULL);
len = fribidi_unicode_to_charset(charset, visual, len, fribidi_text);
}
}
#endif
#if !BAR_PANGO_PATCH
#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};
#endif // BAR_PANGO_PATCH
#if BAR_POWERLINE_TAGS_PATCH || BAR_POWERLINE_STATUS_PATCH
Clr transcheme[3];
#endif // BAR_POWERLINE_TAGS_PATCH | BAR_POWERLINE_STATUS_PATCH
#if !BAR_PANGO_PATCH
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;
}
#endif // BAR_PANGO_PATCH
Drw *
#if BAR_ALPHA_PATCH
drw_create(Display *dpy, int screen, Window root, unsigned int w, unsigned int h, Visual *visual, unsigned int depth, Colormap cmap)
#else
drw_create(Display *dpy, int screen, Window root, unsigned int w, unsigned int h)
#endif // BAR_ALPHA_PATCH
{
Drw *drw = ecalloc(1, sizeof(Drw));
drw->dpy = dpy;
drw->screen = screen;
drw->root = root;
drw->w = w;
drw->h = h;
#if BAR_ALPHA_PATCH
drw->visual = visual;
drw->depth = depth;
drw->cmap = cmap;
drw->drawable = XCreatePixmap(dpy, root, w, h, depth);
#if BAR_WINICON_PATCH
drw->picture = XRenderCreatePicture(dpy, drw->drawable, XRenderFindVisualFormat(dpy, visual), 0, NULL);
#endif // BAR_WINICON_PATCH
drw->gc = XCreateGC(dpy, drw->drawable, 0, NULL);
#else
drw->drawable = XCreatePixmap(dpy, root, w, h, DefaultDepth(dpy, screen));
#if BAR_WINICON_PATCH
drw->picture = XRenderCreatePicture(dpy, drw->drawable, XRenderFindVisualFormat(dpy, DefaultVisual(dpy, screen)), 0, NULL);
#endif // BAR_WINICON_PATCH
drw->gc = XCreateGC(dpy, root, 0, NULL);
#endif // BAR_ALPHA_PATCH
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 BAR_WINICON_PATCH
if (drw->picture)
XRenderFreePicture(drw->dpy, drw->picture);
#endif // BAR_WINICON_PATCH
if (drw->drawable)
XFreePixmap(drw->dpy, drw->drawable);
#if BAR_ALPHA_PATCH
drw->drawable = XCreatePixmap(drw->dpy, drw->root, w, h, drw->depth);
#if BAR_WINICON_PATCH
drw->picture = XRenderCreatePicture(drw->dpy, drw->drawable, XRenderFindVisualFormat(drw->dpy, drw->visual), 0, NULL);
#endif // BAR_WINICON_PATCH
#else // !BAR_ALPHA_PATCH
drw->drawable = XCreatePixmap(drw->dpy, drw->root, w, h, DefaultDepth(drw->dpy, drw->screen));
#if BAR_WINICON_PATCH
drw->picture = XRenderCreatePicture(drw->dpy, drw->drawable, XRenderFindVisualFormat(drw->dpy, DefaultVisual(drw->dpy, drw->screen)), 0, NULL);
#endif // BAR_WINICON_PATCH
#endif // BAR_ALPHA_PATCH
}
void
drw_free(Drw *drw)
{
#if BAR_WINICON_PATCH
XRenderFreePicture(drw->dpy, drw->picture);
#endif // BAR_WINICON_PATCH
XFreePixmap(drw->dpy, drw->drawable);
XFreeGC(drw->dpy, drw->gc);
drw_fontset_free(drw->fonts);
free(drw);
}
#if BAR_PANGO_PATCH
/* This function is an implementation detail. Library users should use
* drw_font_create instead.
*/
static Fnt *
xfont_create(Drw *drw, const char *fontname)
{
Fnt *font;
PangoFontMap *fontmap;
PangoContext *context;
PangoFontDescription *desc;
PangoFontMetrics *metrics;
if (!fontname) {
die("no font specified.");
}
font = ecalloc(1, sizeof(Fnt));
font->dpy = drw->dpy;
fontmap = pango_xft_get_font_map(drw->dpy, drw->screen);
context = pango_font_map_create_context(fontmap);
desc = pango_font_description_from_string(fontname);
font->layout = pango_layout_new(context);
pango_layout_set_font_description(font->layout, desc);
metrics = pango_context_get_metrics(context, desc, pango_language_from_string ("en-us"));
font->h = pango_font_metrics_get_height(metrics) / PANGO_SCALE;
pango_font_metrics_unref(metrics);
g_object_unref(context);
return font;
}
#else
/* 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.");
}
#if BAR_NO_COLOR_EMOJI_PATCH
/* 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;
}
#endif // BAR_NO_COLOR_EMOJI_PATCH
font = ecalloc(1, sizeof(Fnt));
font->xfont = xfont;
font->pattern = pattern;
font->h = xfont->ascent + xfont->descent;
font->dpy = drw->dpy;
return font;
}
#endif // BAR_PANGO_PATCH
static void
xfont_free(Fnt *font)
{
if (!font)
return;
#if BAR_PANGO_PATCH
if (font->layout)
g_object_unref(font->layout);
#else
if (font->pattern)
FcPatternDestroy(font->pattern);
XftFontClose(font->dpy, font->xfont);
#endif // BAR_PANGO_PATCH
free(font);
}
#if BAR_PANGO_PATCH
Fnt*
drw_font_create(Drw* drw, const char font[])
{
Fnt *fnt = NULL;
if (!drw || !font)
return NULL;
fnt = xfont_create(drw, font);
return (drw->fonts = fnt);
}
#else
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);
}
#endif // BAR_PANGO_PATCH
void
drw_fontset_free(Fnt *font)
{
if (font) {
#if !BAR_PANGO_PATCH
drw_fontset_free(font->next);
#endif // BAR_PANGO_PATCH
xfont_free(font);
}
}
void
drw_clr_create(
Drw *drw,
Clr *dest,
const char *clrname
#if BAR_ALPHA_PATCH
, unsigned int alpha
#endif // BAR_ALPHA_PATCH
) {
if (!drw || !dest || !clrname)
return;
#if BAR_ALPHA_PATCH
if (!XftColorAllocName(drw->dpy, drw->visual, drw->cmap,
clrname, dest))
#if DO_NOT_DIE_ON_COLOR_ALLOCATION_FAILURE_PATCH
fprintf(stderr, "warning, cannot allocate color '%s'", clrname);
#else
die("error, cannot allocate color '%s'", clrname);
#endif // DO_NOT_DIE_ON_COLOR_ALLOCATION_FAILURE_PATCH
dest->pixel = (dest->pixel & 0x00ffffffU) | (alpha << 24);
#else
if (!XftColorAllocName(drw->dpy, DefaultVisual(drw->dpy, drw->screen),
DefaultColormap(drw->dpy, drw->screen),
clrname, dest))
#if DO_NOT_DIE_ON_COLOR_ALLOCATION_FAILURE_PATCH
fprintf(stderr, "warning, cannot allocate color '%s'", clrname);
#else
die("error, cannot allocate color '%s'", clrname);
#endif // DO_NOT_DIE_ON_COLOR_ALLOCATION_FAILURE_PATCH
#if NO_TRANSPARENT_BORDERS_PATCH
dest->pixel |= 0xff << 24;
#endif // NO_TRANSPARENT_BORDERS_PATCH
#endif // BAR_ALPHA_PATCH
}
/* 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,
char *clrnames[],
#if BAR_ALPHA_PATCH
const unsigned int alphas[],
#endif // BAR_ALPHA_PATCH
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++)
#if BAR_ALPHA_PATCH
drw_clr_create(drw, &ret[i], clrnames[i], alphas[i]);
#else
drw_clr_create(drw, &ret[i], clrnames[i]);
#endif // BAR_ALPHA_PATCH
return ret;
}
#if !BAR_PANGO_PATCH
void
drw_setfontset(Drw *drw, Fnt *set)
{
if (drw)
drw->fonts = set;
}
#endif // BAR_PANGO_PATCH
void
drw_setscheme(Drw *drw, Clr *scm)
{
if (drw)
drw->scheme = scm;
}
#if BAR_POWERLINE_TAGS_PATCH || BAR_POWERLINE_STATUS_PATCH
void
drw_settrans(Drw *drw, Clr *psc, Clr *nsc)
{
if (drw) {
transcheme[0] = psc[ColBg]; transcheme[1] = nsc[ColBg]; transcheme[2] = psc[ColBorder];
drw->scheme = transcheme;
}
}
#endif // BAR_POWERLINE_TAGS_PATCH | BAR_POWERLINE_STATUS_PATCH
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);
}
#if BIDI_PATCH
int
_drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, unsigned int lpad, const char *text, int invert, Bool markup)
#else
int
drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, unsigned int lpad, const char *text, int invert, Bool markup)
#endif // BIDI_PATCH
{
#if BAR_PANGO_PATCH
char buf[1024];
int ty;
unsigned int ew;
XftDraw *d = NULL;
size_t i, len;
int render = x || y || w || h;
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);
#if BAR_ALPHA_PATCH
d = XftDrawCreate(drw->dpy, drw->drawable, drw->visual, drw->cmap);
#else
d = XftDrawCreate(drw->dpy, drw->drawable,
DefaultVisual(drw->dpy, drw->screen),
DefaultColormap(drw->dpy, drw->screen));
#endif // BAR_ALPHA_PATCH
x += lpad;
w -= lpad;
}
len = strlen(text);
if (len) {
drw_font_getexts(drw->fonts, text, len, &ew, NULL, markup);
/* shorten text if necessary */
for (len = MIN(len, sizeof(buf) - 1); len && ew > w; len--)
drw_font_getexts(drw->fonts, text, len, &ew, NULL, markup);
if (len) {
memcpy(buf, text, len);
buf[len] = '\0';
if (len < strlen(text))
for (i = len; i && i > len - 3; buf[--i] = '.')
; /* NOP */
if (render) {
ty = y + (h - drw->fonts->h) / 2;
if (markup)
pango_layout_set_markup(drw->fonts->layout, buf, len);
else
pango_layout_set_text(drw->fonts->layout, buf, len);
pango_xft_render_layout(d, &drw->scheme[invert ? ColBg : ColFg],
drw->fonts->layout, x * PANGO_SCALE, ty * PANGO_SCALE);
if (markup) /* clear markup attributes */
pango_layout_set_attributes(drw->fonts->layout, NULL);
}
x += ew;
w -= ew;
}
}
if (d)
XftDrawDestroy(d);
return x + (render ? w : 0);
#else
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);
#if BAR_ALPHA_PATCH
d = XftDrawCreate(drw->dpy, drw->drawable, drw->visual, drw->cmap);
#else
d = XftDrawCreate(drw->dpy, drw->drawable,
DefaultVisual(drw->dpy, drw->screen),
DefaultColormap(drw->dpy, drw->screen));
#endif // BAR_ALPHA_PATCH
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; drw_font_getexts(usedfont, utf8str, len, &ew, NULL))
len--;
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);
#if BAR_NO_COLOR_EMOJI_PATCH
FcPatternAddBool(fcpattern, FC_COLOR, FcFalse);
#endif // BAR_NO_COLOR_EMOJI_PATCH
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);
#endif // BAR_PANGO_PATCH
}
#if BIDI_PATCH
int
drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, unsigned int lpad, const char *text, int invert, Bool markup)
{
apply_fribidi(text);
return _drw_text(drw, x, y, w, h, lpad, fribidi_text, invert, markup);
}
#endif // BIDI_PATCH
#if BAR_POWERLINE_TAGS_PATCH || BAR_POWERLINE_STATUS_PATCH
void
drw_arrow(Drw *drw, int x, int y, unsigned int w, unsigned int h, int direction, int slash)
{
if (!drw || !drw->scheme)
return;
/* direction=1 draws right arrow */
x = direction ? x : x + w;
w = direction ? w : -w;
/* slash=1 draws slash instead of arrow */
unsigned int hh = slash ? (direction ? 0 : h) : h/2;
XPoint points[] = {
{x , y },
{x + w, y + hh },
{x , y + h },
};
XPoint bg[] = {
{x , y },
{x + w, y },
{x + w, y + h},
{x , y + h},
};
XSetForeground(drw->dpy, drw->gc, drw->scheme[ColBg].pixel);
XFillPolygon(drw->dpy, drw->drawable, drw->gc, bg, 4, Convex, CoordModeOrigin);
XSetForeground(drw->dpy, drw->gc, drw->scheme[ColFg].pixel);
XFillPolygon(drw->dpy, drw->drawable, drw->gc, points, 3, Nonconvex, CoordModeOrigin);
}
#endif // BAR_POWERLINE_TAGS_PATCH | BAR_POWERLINE_STATUS_PATCH
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, Bool markup)
{
if (!drw || !drw->fonts || !text)
return 0;
return drw_text(drw, 0, 0, 0, 0, 0, text, 0, markup);
}
#if BAR_PANGO_PATCH
void
drw_font_getexts(Fnt *font, const char *text, unsigned int len, unsigned int *w, unsigned int *h, Bool markup)
{
if (!font || !text)
return;
PangoRectangle r;
if (markup)
pango_layout_set_markup(font->layout, text, len);
else
pango_layout_set_text(font->layout, text, len);
pango_layout_get_extents(font->layout, 0, &r);
if (markup) /* clear markup attributes */
pango_layout_set_attributes(font->layout, NULL);
if (w)
*w = r.width / PANGO_SCALE;
if (h)
*h = font->h;
}
#else
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;
}
#endif // BAR_PANGO_PATCH
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);
}