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-rw-r--r--draw.c163
1 files changed, 163 insertions, 0 deletions
diff --git a/draw.c b/draw.c
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index 0000000..85ff41b
--- /dev/null
+++ b/draw.c
@@ -0,0 +1,163 @@
+/*
+ * (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;
+ }
+}