draw.c
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/*
* (C)opyright MMIV-MMVI Anselm R. Garbe <garbeam at gmail dot com>
* See LICENSE file for license details.
*/
#include <stdio.h>
#include <string.h>
#include "draw.h"
#include "util.h"
static void
drawborder(Display *dpy, Brush *b)
{
XPoint points[5];
XSetLineAttributes(dpy, b->gc, 1, LineSolid, CapButt, JoinMiter);
XSetForeground(dpy, b->gc, b->color.border);
points[0].x = b->rect.x;
points[0].y = b->rect.y;
points[1].x = b->rect.width - 1;
points[1].y = 0;
points[2].x = 0;
points[2].y = b->rect.height - 1;
points[3].x = -(b->rect.width - 1);
points[3].y = 0;
points[4].x = 0;
points[4].y = -(b->rect.height - 1);
XDrawLines(dpy, b->drawable, b->gc, points, 5, CoordModePrevious);
}
void
draw(Display *dpy, Brush *b)
{
unsigned int x, y, w, h, len;
static char buf[256];
XGCValues gcv;
XSetForeground(dpy, b->gc, b->color.bg);
XFillRectangles(dpy, b->drawable, b->gc, &b->rect, 1);
if(b->border)
drawborder(dpy, b);
if(!b->text)
return;
len = strlen(b->text);
if(len >= sizeof(buf))
len = sizeof(buf) - 1;
memcpy(buf, b->text, len);
buf[len] = 0;
h = b->font->ascent + b->font->descent;
y = b->rect.y + (b->rect.height / 2) - (h / 2) + b->font->ascent;
x = b->rect.x + (h / 2);
/* shorten text if necessary */
while(len && (w = textwidth_l(b->font, buf, len)) > b->rect.width - h)
buf[--len] = 0;
if(w > b->rect.width)
return; /* too long */
gcv.foreground = b->color.fg;
gcv.background = b->color.bg;
if(b->font->set) {
XChangeGC(dpy, b->gc, GCForeground | GCBackground, &gcv);
XmbDrawImageString(dpy, b->drawable, b->font->set, b->gc,
x, y, buf, len);
}
else {
gcv.font = b->font->xfont->fid;
XChangeGC(dpy, b->gc, GCForeground | GCBackground | GCFont, &gcv);
XDrawImageString(dpy, b->drawable, b->gc, x, y, buf, len);
}
}
static unsigned long
xloadcolor(Display *dpy, Colormap cmap, const char *colstr)
{
XColor color;
XAllocNamedColor(dpy, cmap, colstr, &color, &color);
return color.pixel;
}
void
loadcolor(Display *dpy, int screen, Color *c,
const char *bg, const char *fg, const char *border)
{
Colormap cmap = DefaultColormap(dpy, screen);
c->bg = xloadcolor(dpy, cmap, bg);
c->fg = xloadcolor(dpy, cmap, fg);
c->border = xloadcolor(dpy, cmap, border);
}
unsigned int
textwidth_l(Fnt *font, char *text, unsigned int len)
{
if(font->set) {
XRectangle r;
XmbTextExtents(font->set, text, len, 0, &r);
return r.width;
}
return XTextWidth(font->xfont, text, len);
}
unsigned int
textwidth(Fnt *font, char *text)
{
return textwidth_l(font, text, strlen(text));
}
void
loadfont(Display *dpy, Fnt *font, const char *fontstr)
{
char **missing, *def;
int n;
missing = 0;
def = "?";
setlocale(LC_ALL, "");
if(font->set)
XFreeFontSet(dpy, font->set);
font->set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
if(missing) {
while(n--)
fprintf(stderr, "missing fontset: %s\n", missing[n]);
XFreeStringList(missing);
if(font->set) {
XFreeFontSet(dpy, font->set);
font->set = 0;
}
}
if(font->set) {
XFontSetExtents *font_extents;
XFontStruct **xfonts;
char **font_names;
unsigned int i;
font->ascent = font->descent = 0;
font_extents = XExtentsOfFontSet(font->set);
n = XFontsOfFontSet(font->set, &xfonts, &font_names);
for(i = 0, font->ascent = 0, font->descent = 0; i < n; i++) {
if(font->ascent < (*xfonts)->ascent)
font->ascent = (*xfonts)->ascent;
if(font->descent < (*xfonts)->descent)
font->descent = (*xfonts)->descent;
xfonts++;
}
}
else {
if(font->xfont)
XFreeFont(dpy, font->xfont);
font->xfont = 0;
font->xfont = XLoadQueryFont(dpy, fontstr);
if (!font->xfont)
font->xfont = XLoadQueryFont(dpy, "fixed");
if (!font->xfont)
error("error, cannot load 'fixed' font\n");
font->ascent = font->xfont->ascent;
font->descent = font->xfont->descent;
}
}