draw.c

   1 /* (C)opyright MMIV-MMVI Anselm R. Garbe <garbeam at gmail dot com>
   2  * See LICENSE file for license details.
   3  */
   4 #include "dmenu.h"
   5 #include <stdio.h>
   6 #include <string.h>
   7 #include <X11/Xlocale.h>
   8
   9 /* static */
  10
  11 static unsigned int
  12 textnw(const char *text, unsigned int len) {
  13         XRectangle r;
  14
  15         if(dc.font.set) {
  16                 XmbTextExtents(dc.font.set, text, len, NULL, &r);
  17                 return r.width;
  18         }
  19         return XTextWidth(dc.font.xfont, text, len);
  20 }
  21
  22 /* extern */
  23
  24 void
  25 drawtext(const char *text, unsigned long col[ColLast]) {
  26         int x, y, w, h;
  27         static char buf[256];
  28         unsigned int len, olen;
  29         XGCValues gcv;
  30         XRectangle r = { dc.x, dc.y, dc.w, dc.h };
  31
  32         XSetForeground(dpy, dc.gc, col[ColBG]);
  33         XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
  34         if(!text)
  35                 return;
  36         w = 0;
  37         olen = len = strlen(text);
  38         if(len >= sizeof buf)
  39                 len = sizeof buf - 1;
  40         memcpy(buf, text, len);
  41         buf[len] = 0;
  42         h = dc.font.ascent + dc.font.descent;
  43         y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
  44         x = dc.x + (h / 2);
  45         /* shorten text if necessary */
  46         while(len && (w = textnw(buf, len)) > dc.w - h)
  47                 buf[--len] = 0;
  48         if(len < olen) {
  49                 if(len > 1)
  50                         buf[len - 1] = '.';
  51                 if(len > 2)
  52                         buf[len - 2] = '.';
  53                 if(len > 3)
  54                         buf[len - 3] = '.';
  55         }
  56         if(w > dc.w)
  57                 return; /* too long */
  58         gcv.foreground = col[ColFG];
  59         if(dc.font.set) {
  60                 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
  61                 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc,
  62                                 x, y, buf, len);
  63         }
  64         else {
  65                 gcv.font = dc.font.xfont->fid;
  66                 XChangeGC(dpy, dc.gc, GCForeground | GCFont, &gcv);
  67                 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
  68         }
  69 }
  70
  71 unsigned long
  72 getcolor(const char *colstr) {
  73         Colormap cmap = DefaultColormap(dpy, screen);
  74         XColor color;
  75
  76         if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
  77                 eprint("error, cannot allocate color '%s'\n", colstr);
  78         return color.pixel;
  79 }
  80
  81 void
  82 setfont(const char *fontstr) {
  83         char **missing, *def;
  84         int i, n;
  85
  86         missing = NULL;
  87         setlocale(LC_ALL, "");
  88         if(dc.font.set)
  89                 XFreeFontSet(dpy, dc.font.set);
  90         dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
  91         if(missing) {
  92                 XFreeStringList(missing);
  93                 if(dc.font.set) {
  94                         XFreeFontSet(dpy, dc.font.set);
  95                         dc.font.set = NULL;
  96                 }
  97         }
  98         if(dc.font.set) {
  99                 XFontSetExtents *font_extents;
 100                 XFontStruct **xfonts;
 101                 char **font_names;
 102                 dc.font.ascent = dc.font.descent = 0;
 103                 font_extents = XExtentsOfFontSet(dc.font.set);
 104                 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
 105                 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
 106                         if(dc.font.ascent < (*xfonts)->ascent)
 107                                 dc.font.ascent = (*xfonts)->ascent;
 108                         if(dc.font.descent < (*xfonts)->descent)
 109                                 dc.font.descent = (*xfonts)->descent;
 110                         xfonts++;
 111                 }
 112         }
 113         else {
 114                 if(dc.font.xfont)
 115                         XFreeFont(dpy, dc.font.xfont);
 116                 dc.font.xfont = NULL;
 117                 dc.font.xfont = XLoadQueryFont(dpy, fontstr);
 118                 if (!dc.font.xfont)
 119                         dc.font.xfont = XLoadQueryFont(dpy, "fixed");
 120                 if (!dc.font.xfont)
 121                         eprint("error, cannot init 'fixed' font\n");
 122                 dc.font.ascent = dc.font.xfont->ascent;
 123                 dc.font.descent = dc.font.xfont->descent;
 124         }
 125         dc.font.height = dc.font.ascent + dc.font.descent;
 126 }
 127
 128 unsigned int
 129 textw(const char *text) {
 130         return textnw(text, strlen(text)) + dc.font.height;
 131 }