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