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 <X11/Xlocale.h>
#include "wm.h"
static void
drawborder(void)
{
XPoint points[5];
XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
XSetForeground(dpy, dc.gc, dc.border);
points[0].x = dc.x;
points[0].y = dc.y;
points[1].x = dc.w - 1;
points[1].y = 0;
points[2].x = 0;
points[2].y = dc.h - 1;
points[3].x = -(dc.w - 1);
points[3].y = 0;
points[4].x = 0;
points[4].y = -(dc.h - 1);
XDrawLines(dpy, dc.drawable, dc.gc, points, 5, CoordModePrevious);
}
void
draw(Bool border, const char *text)
{
int x, y, w, h;
unsigned int len;
static char buf[256];
XGCValues gcv;
XRectangle r = { dc.x, dc.y, dc.w, dc.h };
XSetForeground(dpy, dc.gc, dc.bg);
XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
w = 0;
if(border)
drawborder();
if(!text)
return;
len = strlen(text);
if(len >= sizeof(buf))
len = sizeof(buf) - 1;
memcpy(buf, text, len);
buf[len] = 0;
h = dc.font.ascent + dc.font.descent;
y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
x = dc.x + (h / 2);
/* shorten text if necessary */
while(len && (w = textnw(&dc.font, buf, len)) > dc.w - h)
buf[--len] = 0;
if(w > dc.w)
return; /* too long */
gcv.foreground = dc.fg;
gcv.background = dc.bg;
if(dc.font.set) {
XChangeGC(dpy, dc.gc, GCForeground | GCBackground, &gcv);
XmbDrawImageString(dpy, dc.drawable, dc.font.set, dc.gc,
x, y, buf, len);
}
else {
gcv.font = dc.font.xfont->fid;
XChangeGC(dpy, dc.gc, GCForeground | GCBackground | GCFont, &gcv);
XDrawImageString(dpy, dc.drawable, dc.gc, x, y, buf, len);
}
}
static unsigned long
xinitcolors(Colormap cmap, const char *colstr)
{
XColor color;
XAllocNamedColor(dpy, cmap, colstr, &color, &color);
return color.pixel;
}
void
initcolors(const char *bg, const char *fg, const char *border)
{
Colormap cmap = DefaultColormap(dpy, screen);
dc.bg = xinitcolors(cmap, bg);
dc.fg = xinitcolors(cmap, fg);
dc.border = xinitcolors(cmap, border);
}
unsigned int
textnw(Fnt *font, char *text, unsigned int len)
{
XRectangle r;
if(font->set) {
XmbTextExtents(font->set, text, len, NULL, &r);
return r.width;
}
return XTextWidth(font->xfont, text, len);
}
unsigned int
textw(Fnt *font, char *text)
{
return textnw(font, text, strlen(text));
}
unsigned int
texth(Fnt *font)
{
return font->height + 4;
}
void
initfont(Fnt *font, const char *fontstr)
{
char **missing, *def;
int i, n;
missing = NULL;
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 = NULL;
}
}
if(font->set) {
XFontSetExtents *font_extents;
XFontStruct **xfonts;
char **font_names;
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 = NULL;
font->xfont = XLoadQueryFont(dpy, fontstr);
if (!font->xfont)
font->xfont = XLoadQueryFont(dpy, "fixed");
if (!font->xfont)
error("error, cannot init 'fixed' font\n");
font->ascent = font->xfont->ascent;
font->descent = font->xfont->descent;
}
font->height = font->ascent + font->descent;
}