1/*
  2 * (C)opyright MMIV-MMVI Anselm R. Garbe <garbeam at gmail dot com>
  3 * See LICENSE file for license details.
  4 */
  5
  6#include <stdio.h>
  7#include <string.h>
  8
  9#include "draw.h"
 10#include "util.h"
 11
 12static void
 13drawborder(Display *dpy, Brush *b)
 14{
 15	XPoint points[5];
 16	XSetLineAttributes(dpy, b->gc, 1, LineSolid, CapButt, JoinMiter);
 17	XSetForeground(dpy, b->gc, b->border);
 18	points[0].x = b->x;
 19	points[0].y = b->y;
 20	points[1].x = b->w - 1;
 21	points[1].y = 0;
 22	points[2].x = 0;
 23	points[2].y = b->h - 1;
 24	points[3].x = -(b->w - 1);
 25	points[3].y = 0;
 26	points[4].x = 0;
 27	points[4].y = -(b->h - 1);
 28	XDrawLines(dpy, b->drawable, b->gc, points, 5, CoordModePrevious);
 29}
 30
 31void
 32draw(Display *dpy, Brush *b, Bool border, const char *text)
 33{
 34	unsigned int x, y, w, h, len;
 35	static char buf[256];
 36	XGCValues gcv;
 37	XRectangle r = { b->x, b->y, b->w, b->h };
 38
 39	XSetForeground(dpy, b->gc, b->bg);
 40	XFillRectangles(dpy, b->drawable, b->gc, &r, 1);
 41
 42	w = 0;
 43	if(border)
 44		drawborder(dpy, b);
 45
 46	if(!text)
 47		return;
 48
 49	len = strlen(text);
 50	if(len >= sizeof(buf))
 51		len = sizeof(buf) - 1;
 52	memcpy(buf, text, len);
 53	buf[len] = 0;
 54
 55	h = b->font.ascent + b->font.descent;
 56	y = b->y + (b->h / 2) - (h / 2) + b->font.ascent;
 57	x = b->x + (h / 2);
 58
 59	/* shorten text if necessary */
 60	while(len && (w = textnw(&b->font, buf, len)) > b->w - h)
 61		buf[--len] = 0;
 62
 63	if(w > b->w)
 64		return; /* too long */
 65
 66	gcv.foreground = b->fg;
 67	gcv.background = b->bg;
 68	if(b->font.set) {
 69		XChangeGC(dpy, b->gc, GCForeground | GCBackground, &gcv);
 70		XmbDrawImageString(dpy, b->drawable, b->font.set, b->gc,
 71				x, y, buf, len);
 72	}
 73	else {
 74		gcv.font = b->font.xfont->fid;
 75		XChangeGC(dpy, b->gc, GCForeground | GCBackground | GCFont, &gcv);
 76		XDrawImageString(dpy, b->drawable, b->gc, x, y, buf, len);
 77	}
 78}
 79
 80static unsigned long
 81xloadcolors(Display *dpy, Colormap cmap, const char *colstr)
 82{
 83	XColor color;
 84	XAllocNamedColor(dpy, cmap, colstr, &color, &color);
 85	return color.pixel;
 86}
 87
 88void
 89loadcolors(Display *dpy, int screen, Brush *b,
 90		const char *bg, const char *fg, const char *border)
 91{
 92	Colormap cmap = DefaultColormap(dpy, screen);
 93	b->bg = xloadcolors(dpy, cmap, bg);
 94	b->fg = xloadcolors(dpy, cmap, fg);
 95	b->border = xloadcolors(dpy, cmap, border);
 96}
 97
 98unsigned int
 99textnw(Fnt *font, char *text, unsigned int len)
100{
101	XRectangle r;
102	if(font->set) {
103		XmbTextExtents(font->set, text, len, NULL, &r);
104		return r.width;
105	}
106	return XTextWidth(font->xfont, text, len);
107}
108
109unsigned int
110textw(Fnt *font, char *text)
111{
112	return textnw(font, text, strlen(text));
113}
114
115unsigned int
116texth(Fnt *font)
117{
118	return font->height + 4;
119}
120
121void
122loadfont(Display *dpy, Fnt *font, const char *fontstr)
123{
124	char **missing, *def;
125	int n;
126
127	missing = NULL;
128	def = "?";
129	setlocale(LC_ALL, "");
130	if(font->set)
131		XFreeFontSet(dpy, font->set);
132	font->set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
133	if(missing) {
134		while(n--)
135			fprintf(stderr, "missing fontset: %s\n", missing[n]);
136		XFreeStringList(missing);
137		if(font->set) {
138			XFreeFontSet(dpy, font->set);
139			font->set = NULL;
140		}
141	}
142	if(font->set) {
143		XFontSetExtents *font_extents;
144		XFontStruct **xfonts;
145		char **font_names;
146		unsigned int i;
147
148		font->ascent = font->descent = 0;
149		font_extents = XExtentsOfFontSet(font->set);
150		n = XFontsOfFontSet(font->set, &xfonts, &font_names);
151		for(i = 0, font->ascent = 0, font->descent = 0; i < n; i++) {
152			if(font->ascent < (*xfonts)->ascent)
153				font->ascent = (*xfonts)->ascent;
154			if(font->descent < (*xfonts)->descent)
155				font->descent = (*xfonts)->descent;
156			xfonts++;
157		}
158	}
159	else {
160		if(font->xfont)
161			XFreeFont(dpy, font->xfont);
162		font->xfont = NULL;
163		font->xfont = XLoadQueryFont(dpy, fontstr);
164		if (!font->xfont)
165			font->xfont = XLoadQueryFont(dpy, "fixed");
166		if (!font->xfont)
167			error("error, cannot load 'fixed' font\n");
168		font->ascent = font->xfont->ascent;
169		font->descent = font->xfont->descent;
170	}
171	font->height = font->ascent + font->descent;
172}