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