draw.c
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/* See LICENSE file for copyright and license details. */ #include <ctype.h> #include <locale.h> #include <stdarg.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <strings.h> #include <X11/Xlib.h> #include "draw.h" /* macros */ #define MIN(a, b) ((a) < (b) ? (a) : (b)) #define MAX(a, b) ((a) > (b) ? (a) : (b)) /* variables */ const char *progname; void cleanupdraw(DC *dc) { if(dc->font.set) XFreeFontSet(dc->dpy, dc->font.set); else XFreeFont(dc->dpy, dc->font.xfont); XFreePixmap(dc->dpy, dc->drawable); XFreeGC(dc->dpy, dc->gc); } void setupdraw(DC *dc, Window w) { XWindowAttributes wa; XGetWindowAttributes(dc->dpy, w, &wa); dc->drawable = XCreatePixmap(dc->dpy, w, wa.width, wa.height, DefaultDepth(dc->dpy, DefaultScreen(dc->dpy))); dc->gc = XCreateGC(dc->dpy, w, 0, NULL); XSetLineAttributes(dc->dpy, dc->gc, 1, LineSolid, CapButt, JoinMiter); if(!dc->font.set) XSetFont(dc->dpy, dc->gc, dc->font.xfont->fid); } void drawtext(DC *dc, const char *text, unsigned long col[ColLast]) { char buf[256]; int i, x, y, h, len, olen; XRectangle r = { dc->x, dc->y, dc->w, dc->h }; XSetForeground(dc->dpy, dc->gc, col[ColBG]); XFillRectangles(dc->dpy, dc->drawable, dc->gc, &r, 1); if(!text) return; olen = strlen(text); h = dc->font.height; y = dc->y + ((h+2) / 2) - (h / 2) + dc->font.ascent; x = dc->x + (h / 2); /* shorten text if necessary */ for(len = MIN(olen, sizeof buf); len && textnw(dc, text, len) > dc->w - h; len--); if(!len) return; memcpy(buf, text, len); if(len < olen) for(i = len; i && i > len - 3; buf[--i] = '.'); XSetForeground(dc->dpy, dc->gc, col[ColFG]); if(dc->font.set) XmbDrawString(dc->dpy, dc->drawable, dc->font.set, dc->gc, x, y, buf, len); else XDrawString(dc->dpy, dc->drawable, dc->gc, x, y, buf, len); } void eprint(const char *fmt, ...) { va_list ap; fprintf(stderr, "%s: ", progname); va_start(ap, fmt); vfprintf(stderr, fmt, ap); va_end(ap); exit(EXIT_FAILURE); } unsigned long getcolor(DC *dc, const char *colstr) { Colormap cmap = DefaultColormap(dc->dpy, DefaultScreen(dc->dpy)); XColor color; if(!XAllocNamedColor(dc->dpy, cmap, colstr, &color, &color)) eprint("cannot allocate color '%s'\n", colstr); return color.pixel; } void initfont(DC *dc, const char *fontstr) { char *def, **missing = NULL; int i, n; if(!fontstr || !*fontstr) eprint("cannot load null font\n"); dc->font.set = XCreateFontSet(dc->dpy, fontstr, &missing, &n, &def); if(missing) XFreeStringList(missing); if(dc->font.set) { XFontStruct **xfonts; char **font_names; dc->font.ascent = dc->font.descent = 0; n = XFontsOfFontSet(dc->font.set, &xfonts, &font_names); for(i = 0; i < n; i++) { dc->font.ascent = MAX(dc->font.ascent, (*xfonts)->ascent); dc->font.descent = MAX(dc->font.descent, (*xfonts)->descent); xfonts++; } } else { if(!(dc->font.xfont = XLoadQueryFont(dc->dpy, fontstr)) && !(dc->font.xfont = XLoadQueryFont(dc->dpy, "fixed"))) eprint("cannot load font '%s'\n", fontstr); dc->font.ascent = dc->font.xfont->ascent; dc->font.descent = dc->font.xfont->descent; } dc->font.height = dc->font.ascent + dc->font.descent; } int textnw(DC *dc, const char *text, unsigned int len) { XRectangle r; if(dc->font.set) { XmbTextExtents(dc->font.set, text, len, NULL, &r); return r.width; } return XTextWidth(dc->font.xfont, text, len); } int textw(DC *dc, const char *text) { return textnw(dc, text, strlen(text)) + dc->font.height; }