diff options
Diffstat (limited to 'drw.c')
| -rw-r--r-- | drw.c | 423 |
1 files changed, 0 insertions, 423 deletions
@@ -1,423 +0,0 @@ -/* 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) -{ - 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); -} |