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)
  28 {
  29         int x, y, w, h;
  30         static char buf[256];
  31         unsigned int len;
  32         XGCValues gcv;
  33         XRectangle r = { dc.x, dc.y, dc.w, dc.h };
  34
  35         XSetForeground(dpy, dc.gc, invert ? dc.fg : dc.bg);
  36         XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
  37         w = 0;
  38
  39         if(!text)
  40                 return;
  41
  42         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
  56         if(w > dc.w)
  57                 return; /* too long */
  58
  59         gcv.foreground = invert ? dc.bg : dc.fg;
  60         gcv.background = invert ? dc.fg : dc.bg;
  61         if(dc.font.set) {
  62                 XChangeGC(dpy, dc.gc, GCForeground | GCBackground, &gcv);
  63                 XmbDrawImageString(dpy, dc.drawable, dc.font.set, dc.gc,
  64                                 x, y, buf, len);
  65         }
  66         else {
  67                 gcv.font = dc.font.xfont->fid;
  68                 XChangeGC(dpy, dc.gc, GCForeground | GCBackground | GCFont, &gcv);
  69                 XDrawImageString(dpy, dc.drawable, dc.gc, x, y, buf, len);
  70         }
  71 }
  72
  73 unsigned long
  74 getcolor(const char *colstr)
  75 {
  76         Colormap cmap = DefaultColormap(dpy, screen);
  77         XColor color;
  78
  79         XAllocNamedColor(dpy, cmap, colstr, &color, &color);
  80         return color.pixel;
  81 }
  82
  83 void
  84 setfont(const char *fontstr)
  85 {
  86         char **missing, *def;
  87         int i, n;
  88
  89         missing = NULL;
  90         setlocale(LC_ALL, "");
  91         if(dc.font.set)
  92                 XFreeFontSet(dpy, dc.font.set);
  93         dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
  94         if(missing) {
  95                 XFreeStringList(missing);
  96                 if(dc.font.set) {
  97                         XFreeFontSet(dpy, dc.font.set);
  98                         dc.font.set = NULL;
  99                 }
 100         }
 101         if(dc.font.set) {
 102                 XFontSetExtents *font_extents;
 103                 XFontStruct **xfonts;
 104                 char **font_names;
 105
 106                 dc.font.ascent = dc.font.descent = 0;
 107                 font_extents = XExtentsOfFontSet(dc.font.set);
 108                 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
 109                 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
 110                         if(dc.font.ascent < (*xfonts)->ascent)
 111                                 dc.font.ascent = (*xfonts)->ascent;
 112                         if(dc.font.descent < (*xfonts)->descent)
 113                                 dc.font.descent = (*xfonts)->descent;
 114                         xfonts++;
 115                 }
 116         }
 117         else {
 118                 if(dc.font.xfont)
 119                         XFreeFont(dpy, dc.font.xfont);
 120                 dc.font.xfont = NULL;
 121                 dc.font.xfont = XLoadQueryFont(dpy, fontstr);
 122                 if (!dc.font.xfont)
 123                         dc.font.xfont = XLoadQueryFont(dpy, "fixed");
 124                 if (!dc.font.xfont)
 125                         eprint("error, cannot init 'fixed' font\n");
 126                 dc.font.ascent = dc.font.xfont->ascent;
 127                 dc.font.descent = dc.font.xfont->descent;
 128         }
 129         dc.font.height = dc.font.ascent + dc.font.descent;
 130 }
 131
 132 unsigned int
 133 textw(const char *text)
 134 {
 135         return textnw(text, strlen(text)) + dc.font.height;
 136 }