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-rw-r--r--draw.c171
1 files changed, 171 insertions, 0 deletions
diff --git a/draw.c b/draw.c
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index 0000000..d747629
--- /dev/null
+++ b/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 "dmenu.h"
+
+static void
+drawborder(Display *dpy, Brush *b)
+{
+ XPoint points[5];
+ XSetLineAttributes(dpy, b->gc, 1, LineSolid, CapButt, JoinMiter);
+ XSetForeground(dpy, b->gc, b->border);
+ points[0].x = b->x;
+ points[0].y = b->y;
+ points[1].x = b->w - 1;
+ points[1].y = 0;
+ points[2].x = 0;
+ points[2].y = b->h - 1;
+ points[3].x = -(b->w - 1);
+ points[3].y = 0;
+ points[4].x = 0;
+ points[4].y = -(b->h - 1);
+ XDrawLines(dpy, b->drawable, b->gc, points, 5, CoordModePrevious);
+}
+
+void
+draw(Display *dpy, Brush *b, Bool border, const char *text)
+{
+ unsigned int x, y, w, h, len;
+ static char buf[256];
+ XGCValues gcv;
+ XRectangle r = { b->x, b->y, b->w, b->h };
+
+ XSetForeground(dpy, b->gc, b->bg);
+ XFillRectangles(dpy, b->drawable, b->gc, &r, 1);
+
+ w = 0;
+ if(border)
+ drawborder(dpy, b);
+
+ if(!text)
+ return;
+
+ len = strlen(text);
+ if(len >= sizeof(buf))
+ len = sizeof(buf) - 1;
+ memcpy(buf, text, len);
+ buf[len] = 0;
+
+ h = b->font.ascent + b->font.descent;
+ y = b->y + (b->h / 2) - (h / 2) + b->font.ascent;
+ x = b->x + (h / 2);
+
+ /* shorten text if necessary */
+ while(len && (w = textnw(&b->font, buf, len)) > b->w - h)
+ buf[--len] = 0;
+
+ if(w > b->w)
+ return; /* too long */
+
+ gcv.foreground = b->fg;
+ gcv.background = b->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
+xloadcolors(Display *dpy, Colormap cmap, const char *colstr)
+{
+ XColor color;
+ XAllocNamedColor(dpy, cmap, colstr, &color, &color);
+ return color.pixel;
+}
+
+void
+loadcolors(Display *dpy, int screen, Brush *b,
+ const char *bg, const char *fg, const char *border)
+{
+ Colormap cmap = DefaultColormap(dpy, screen);
+ b->bg = xloadcolors(dpy, cmap, bg);
+ b->fg = xloadcolors(dpy, cmap, fg);
+ b->border = xloadcolors(dpy, 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
+loadfont(Display *dpy, Fnt *font, const char *fontstr)
+{
+ char **missing, *def;
+ int n;
+
+ missing = NULL;
+ 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 = NULL;
+ }
+ }
+ 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 = NULL;
+ font->xfont = XLoadQueryFont(dpy, fontstr);
+ if (!font->xfont)
+ font->xfont = XLoadQueryFont(dpy, "fixed");
+ if (!font->xfont)
+ eprint("error, cannot load 'fixed' font\n");
+ font->ascent = font->xfont->ascent;
+ font->descent = font->xfont->descent;
+ }
+ font->height = font->ascent + font->descent;
+}