draw.c

   1 /*
   2  * (C)opyright MMIV-MMVI Anselm R. Garbe <garbeam at gmail dot com>
   3  * See LICENSE file for license details.
   4  */
   5 #include "dmenu.h"
   6 #include <stdio.h>
   7 #include <string.h>
   8 #include <X11/Xlocale.h>
   9
  10 /* static */
  11
  12 static unsigned int
  13 textnw(const char *text, unsigned int len)
  14 {
  15         XRectangle r;
  16
  17         if(dc.font.set) {
  18                 XmbTextExtents(dc.font.set, text, len, NULL, &r);
  19                 return r.width;
  20         }
  21         return XTextWidth(dc.font.xfont, text, len);
  22 }
  23
  24 /* extern */
  25
  26 void
  27 drawtext(const char *text, unsigned long col[ColLast])
  28 {
  29         int x, y, w, h;
  30         static char buf[256];
  31         unsigned int len, olen;
  32         XGCValues gcv;
  33         XRectangle r = { dc.x, dc.y, dc.w, dc.h };
  34
  35         XSetForeground(dpy, dc.gc, col[ColBG]);
  36         XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
  37
  38         if(!text)
  39                 return;
  40
  41         w = 0;
  42         olen = len = strlen(text);
  43         if(len >= sizeof(buf))
  44                 len = sizeof(buf) - 1;
  45         memcpy(buf, text, len);
  46         buf[len] = 0;
  47
  48         h = dc.font.ascent + dc.font.descent;
  49         y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
  50         x = dc.x + (h / 2);
  51
  52         /* shorten text if necessary */
  53         while(len && (w = textnw(buf, len)) > dc.w - h)
  54                 buf[--len] = 0;
  55         if(len < olen) {
  56                 if(len > 1)
  57                         buf[len - 1] = '.';
  58                 if(len > 2)
  59                         buf[len - 2] = '.';
  60                 if(len > 3)
  61                         buf[len - 3] = '.';
  62         }
  63
  64         if(w > dc.w)
  65                 return; /* too long */
  66
  67         gcv.foreground = col[ColFG];
  68         if(dc.font.set) {
  69                 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
  70                 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc,
  71                                 x, y, buf, len);
  72         }
  73         else {
  74                 gcv.font = dc.font.xfont->fid;
  75                 XChangeGC(dpy, dc.gc, GCForeground | GCFont, &gcv);
  76                 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
  77         }
  78 }
  79
  80 unsigned long
  81 getcolor(const char *colstr)
  82 {
  83         Colormap cmap = DefaultColormap(dpy, screen);
  84         XColor color;
  85
  86         XAllocNamedColor(dpy, cmap, colstr, &color, &color);
  87         return color.pixel;
  88 }
  89
  90 void
  91 setfont(const char *fontstr)
  92 {
  93         char **missing, *def;
  94         int i, n;
  95
  96         missing = NULL;
  97         setlocale(LC_ALL, "");
  98         if(dc.font.set)
  99                 XFreeFontSet(dpy, dc.font.set);
 100         dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
 101         if(missing) {
 102                 XFreeStringList(missing);
 103                 if(dc.font.set) {
 104                         XFreeFontSet(dpy, dc.font.set);
 105                         dc.font.set = NULL;
 106                 }
 107         }
 108         if(dc.font.set) {
 109                 XFontSetExtents *font_extents;
 110                 XFontStruct **xfonts;
 111                 char **font_names;
 112
 113                 dc.font.ascent = dc.font.descent = 0;
 114                 font_extents = XExtentsOfFontSet(dc.font.set);
 115                 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
 116                 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
 117                         if(dc.font.ascent < (*xfonts)->ascent)
 118                                 dc.font.ascent = (*xfonts)->ascent;
 119                         if(dc.font.descent < (*xfonts)->descent)
 120                                 dc.font.descent = (*xfonts)->descent;
 121                         xfonts++;
 122                 }
 123         }
 124         else {
 125                 if(dc.font.xfont)
 126                         XFreeFont(dpy, dc.font.xfont);
 127                 dc.font.xfont = NULL;
 128                 dc.font.xfont = XLoadQueryFont(dpy, fontstr);
 129                 if (!dc.font.xfont)
 130                         dc.font.xfont = XLoadQueryFont(dpy, "fixed");
 131                 if (!dc.font.xfont)
 132                         eprint("error, cannot init 'fixed' font\n");
 133                 dc.font.ascent = dc.font.xfont->ascent;
 134                 dc.font.descent = dc.font.xfont->descent;
 135         }
 136         dc.font.height = dc.font.ascent + dc.font.descent;
 137 }
 138
 139 unsigned int
 140 textw(const char *text)
 141 {
 142         return textnw(text, strlen(text)) + dc.font.height;
 143 }