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