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 sel)
  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, sel ? dc.fg : dc.bg);
  37         XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
  38         w = 0;
  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 = sel ? dc.bg : dc.fg;
  60         gcv.background = sel ? 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         if(sel) {
  72                 XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
  73                 points[0].x = dc.x;
  74                 points[0].y = dc.y;
  75                 points[1].x = dc.w - 1;
  76                 points[1].y = 0;
  77                 points[2].x = 0;
  78                 points[2].y = dc.h - 1;
  79                 points[3].x = -(dc.w - 1);
  80                 points[3].y = 0;
  81                 points[4].x = 0;
  82                 points[4].y = -(dc.h - 1);
  83                 XDrawLines(dpy, dc.drawable, dc.gc, points, 5, CoordModePrevious);
  84         }
  85
  86 }
  87
  88 unsigned long
  89 getcolor(const char *colstr)
  90 {
  91         Colormap cmap = DefaultColormap(dpy, screen);
  92         XColor color;
  93
  94         XAllocNamedColor(dpy, cmap, colstr, &color, &color);
  95         return color.pixel;
  96 }
  97
  98 void
  99 setfont(const char *fontstr)
 100 {
 101         char **missing, *def;
 102         int i, n;
 103
 104         missing = NULL;
 105         setlocale(LC_ALL, "");
 106         if(dc.font.set)
 107                 XFreeFontSet(dpy, dc.font.set);
 108         dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
 109         if(missing) {
 110                 XFreeStringList(missing);
 111                 if(dc.font.set) {
 112                         XFreeFontSet(dpy, dc.font.set);
 113                         dc.font.set = NULL;
 114                 }
 115         }
 116         if(dc.font.set) {
 117                 XFontSetExtents *font_extents;
 118                 XFontStruct **xfonts;
 119                 char **font_names;
 120
 121                 dc.font.ascent = dc.font.descent = 0;
 122                 font_extents = XExtentsOfFontSet(dc.font.set);
 123                 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
 124                 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
 125                         if(dc.font.ascent < (*xfonts)->ascent)
 126                                 dc.font.ascent = (*xfonts)->ascent;
 127                         if(dc.font.descent < (*xfonts)->descent)
 128                                 dc.font.descent = (*xfonts)->descent;
 129                         xfonts++;
 130                 }
 131         }
 132         else {
 133                 if(dc.font.xfont)
 134                         XFreeFont(dpy, dc.font.xfont);
 135                 dc.font.xfont = NULL;
 136                 dc.font.xfont = XLoadQueryFont(dpy, fontstr);
 137                 if (!dc.font.xfont)
 138                         dc.font.xfont = XLoadQueryFont(dpy, "fixed");
 139                 if (!dc.font.xfont)
 140                         eprint("error, cannot init 'fixed' font\n");
 141                 dc.font.ascent = dc.font.xfont->ascent;
 142                 dc.font.descent = dc.font.xfont->descent;
 143         }
 144         dc.font.height = dc.font.ascent + dc.font.descent;
 145 }
 146
 147 unsigned int
 148 textw(const char *text)
 149 {
 150         return textnw(text, strlen(text)) + dc.font.height;
 151 }