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 int colidx, Bool border)
  28 {
  29         int x, y, w, h;
  30         static char buf[256];
  31         unsigned int len, olen;
  32         XGCValues gcv;
  33         XPoint points[5];
  34         XRectangle r = { dc.x, dc.y, dc.w, dc.h };
  35
  36         XSetForeground(dpy, dc.gc, dc.bg[colidx]);
  37         XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
  38
  39         w = 0;
  40         XSetForeground(dpy, dc.gc, dc.fg[colidx]);
  41         if(border) {
  42                 points[0].x = dc.x;
  43                 points[0].y = dc.y;
  44                 points[1].x = dc.w - 1;
  45                 points[1].y = 0;
  46                 points[2].x = 0;
  47                 points[2].y = dc.h - 1;
  48                 points[3].x = -(dc.w - 1);
  49                 points[3].y = 0;
  50                 points[4].x = 0;
  51                 points[4].y = -(dc.h - 1);
  52                 XDrawLines(dpy, dc.drawable, dc.gc, points, 5, CoordModePrevious);
  53         }
  54
  55         if(!text)
  56                 return;
  57
  58         olen = len = strlen(text);
  59         if(len >= sizeof(buf))
  60                 len = sizeof(buf) - 1;
  61         memcpy(buf, text, len);
  62         buf[len] = 0;
  63
  64         h = dc.font.ascent + dc.font.descent;
  65         y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
  66         x = dc.x + (h / 2);
  67
  68         /* shorten text if necessary */
  69         while(len && (w = textnw(buf, len)) > dc.w - h)
  70                 buf[--len] = 0;
  71         if(len < olen) {
  72                 if(len > 1)
  73                         buf[len - 1] = '.';
  74                 if(len > 2)
  75                         buf[len - 2] = '.';
  76                 if(len > 3)
  77                         buf[len - 3] = '.';
  78         }
  79
  80         if(w > dc.w)
  81                 return; /* too long */
  82
  83         if(dc.font.set)
  84                 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
  85         else {
  86                 gcv.font = dc.font.xfont->fid;
  87                 XChangeGC(dpy, dc.gc, GCFont, &gcv);
  88                 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
  89         }
  90 }
  91
  92 unsigned long
  93 getcolor(const char *colstr)
  94 {
  95         Colormap cmap = DefaultColormap(dpy, screen);
  96         XColor color;
  97
  98         XAllocNamedColor(dpy, cmap, colstr, &color, &color);
  99         return color.pixel;
 100 }
 101
 102 void
 103 setfont(const char *fontstr)
 104 {
 105         char **missing, *def;
 106         int i, n;
 107
 108         missing = NULL;
 109         setlocale(LC_ALL, "");
 110         if(dc.font.set)
 111                 XFreeFontSet(dpy, dc.font.set);
 112         dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
 113         if(missing) {
 114                 XFreeStringList(missing);
 115                 if(dc.font.set) {
 116                         XFreeFontSet(dpy, dc.font.set);
 117                         dc.font.set = NULL;
 118                 }
 119         }
 120         if(dc.font.set) {
 121                 XFontSetExtents *font_extents;
 122                 XFontStruct **xfonts;
 123                 char **font_names;
 124
 125                 dc.font.ascent = dc.font.descent = 0;
 126                 font_extents = XExtentsOfFontSet(dc.font.set);
 127                 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
 128                 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
 129                         if(dc.font.ascent < (*xfonts)->ascent)
 130                                 dc.font.ascent = (*xfonts)->ascent;
 131                         if(dc.font.descent < (*xfonts)->descent)
 132                                 dc.font.descent = (*xfonts)->descent;
 133                         xfonts++;
 134                 }
 135         }
 136         else {
 137                 if(dc.font.xfont)
 138                         XFreeFont(dpy, dc.font.xfont);
 139                 dc.font.xfont = NULL;
 140                 dc.font.xfont = XLoadQueryFont(dpy, fontstr);
 141                 if (!dc.font.xfont)
 142                         dc.font.xfont = XLoadQueryFont(dpy, "fixed");
 143                 if (!dc.font.xfont)
 144                         eprint("error, cannot init 'fixed' font\n");
 145                 dc.font.ascent = dc.font.xfont->ascent;
 146                 dc.font.descent = dc.font.xfont->descent;
 147         }
 148         dc.font.height = dc.font.ascent + dc.font.descent;
 149 }
 150
 151 unsigned int
 152 textw(const char *text)
 153 {
 154         return textnw(text, strlen(text)) + dc.font.height;
 155 }