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, Bool invert, 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, invert ? dc.fg : dc.bg);
  37         XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
  38
  39         w = 0;
  40         if(border) {
  41                 points[0].x = dc.x;
  42                 points[0].y = dc.y;
  43                 points[1].x = dc.w - 1;
  44                 points[1].y = 0;
  45                 points[2].x = 0;
  46                 points[2].y = dc.h - 1;
  47                 points[3].x = -(dc.w - 1);
  48                 points[3].y = 0;
  49                 points[4].x = 0;
  50                 points[4].y = -(dc.h - 1);
  51                 XSetForeground(dpy, dc.gc, dc.border);
  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         gcv.foreground = invert ? dc.bg : dc.fg;
  84         gcv.background = invert ? dc.fg : dc.bg;
  85         if(dc.font.set) {
  86                 XChangeGC(dpy, dc.gc, GCForeground | GCBackground, &gcv);
  87                 XmbDrawImageString(dpy, dc.drawable, dc.font.set, dc.gc,
  88                                 x, y, buf, len);
  89         }
  90         else {
  91                 gcv.font = dc.font.xfont->fid;
  92                 XChangeGC(dpy, dc.gc, GCForeground | GCBackground | GCFont, &gcv);
  93                 XDrawImageString(dpy, dc.drawable, dc.gc, x, y, buf, len);
  94         }
  95 }
  96
  97 unsigned long
  98 getcolor(const char *colstr)
  99 {
 100         Colormap cmap = DefaultColormap(dpy, screen);
 101         XColor color;
 102
 103         XAllocNamedColor(dpy, cmap, colstr, &color, &color);
 104         return color.pixel;
 105 }
 106
 107 void
 108 setfont(const char *fontstr)
 109 {
 110         char **missing, *def;
 111         int i, n;
 112
 113         missing = NULL;
 114         setlocale(LC_ALL, "");
 115         if(dc.font.set)
 116                 XFreeFontSet(dpy, dc.font.set);
 117         dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
 118         if(missing) {
 119                 XFreeStringList(missing);
 120                 if(dc.font.set) {
 121                         XFreeFontSet(dpy, dc.font.set);
 122                         dc.font.set = NULL;
 123                 }
 124         }
 125         if(dc.font.set) {
 126                 XFontSetExtents *font_extents;
 127                 XFontStruct **xfonts;
 128                 char **font_names;
 129
 130                 dc.font.ascent = dc.font.descent = 0;
 131                 font_extents = XExtentsOfFontSet(dc.font.set);
 132                 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
 133                 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
 134                         if(dc.font.ascent < (*xfonts)->ascent)
 135                                 dc.font.ascent = (*xfonts)->ascent;
 136                         if(dc.font.descent < (*xfonts)->descent)
 137                                 dc.font.descent = (*xfonts)->descent;
 138                         xfonts++;
 139                 }
 140         }
 141         else {
 142                 if(dc.font.xfont)
 143                         XFreeFont(dpy, dc.font.xfont);
 144                 dc.font.xfont = NULL;
 145                 dc.font.xfont = XLoadQueryFont(dpy, fontstr);
 146                 if (!dc.font.xfont)
 147                         dc.font.xfont = XLoadQueryFont(dpy, "fixed");
 148                 if (!dc.font.xfont)
 149                         eprint("error, cannot init 'fixed' font\n");
 150                 dc.font.ascent = dc.font.xfont->ascent;
 151                 dc.font.descent = dc.font.xfont->descent;
 152         }
 153         dc.font.height = dc.font.ascent + dc.font.descent;
 154 }
 155
 156 unsigned int
 157 textw(const char *text)
 158 {
 159         return textnw(text, strlen(text)) + dc.font.height;
 160 }