draw.c

   1 /*
   2  * draw.c - draw functions
   3  *
   4  * Copyright © 2007 Julien Danjou <julien@danjou.info>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  */
  21
  22 #include "layout.h"
  23 #include "util.h"
  24 #include "draw.h"
  25
  26 extern Client *clients, *sel, *stack;   /* global client list and stack */
  27
  28 /* static */
  29
  30 void
  31 drawtext(Display *disp, DC drawcontext, Drawable drawable, const char *text, unsigned long col[ColLast])
  32 {
  33     int x, y, w, h;
  34     static char buf[256];
  35     unsigned int len, olen;
  36     XRectangle r = { drawcontext.x, drawcontext.y, drawcontext.w, drawcontext.h };
  37
  38     XSetForeground(disp, drawcontext.gc, col[ColBG]);
  39     XFillRectangles(disp, drawable, drawcontext.gc, &r, 1);
  40     if(!text)
  41         return;
  42     w = 0;
  43     olen = len = a_strlen(text);
  44     if(len >= sizeof buf)
  45         len = sizeof buf - 1;
  46     memcpy(buf, text, len);
  47     buf[len] = 0;
  48     h = drawcontext.font.ascent + drawcontext.font.descent;
  49     y = drawcontext.y + (drawcontext.h / 2) - (h / 2) + drawcontext.font.ascent;
  50     x = drawcontext.x + (h / 2);
  51     /* shorten text if necessary */
  52     while(len && (w = textnw(drawcontext.font.set, drawcontext.font.xfont, buf, len)) > drawcontext.w - h)
  53         buf[--len] = 0;
  54     if(w > drawcontext.w)
  55         return;                 /* too long */
  56     if(len < olen)
  57     {
  58         if(len > 1)
  59             buf[len - 1] = '.';
  60         if(len > 2)
  61             buf[len - 2] = '.';
  62         if(len > 3)
  63             buf[len - 3] = '.';
  64     }
  65     XSetForeground(disp, drawcontext.gc, col[ColFG]);
  66     if(drawcontext.font.set)
  67         XmbDrawString(disp, drawable, drawcontext.font.set, drawcontext.gc, x, y, buf, len);
  68     else
  69         XDrawString(disp, drawable, drawcontext.gc, x, y, buf, len);
  70 }
  71
  72 void
  73 drawsquare(Display *disp, DC drawcontext, Bool filled, Bool empty, unsigned long col[ColLast], Statusbar *statusbar)
  74 {
  75     int x;
  76     XGCValues gcv;
  77     XRectangle r = { drawcontext.x, drawcontext.y, drawcontext.w, drawcontext.h };
  78
  79     gcv.foreground = col[ColFG];
  80     XChangeGC(disp, drawcontext.gc, GCForeground, &gcv);
  81     x = (drawcontext.font.ascent + drawcontext.font.descent + 2) / 4;
  82     r.x = drawcontext.x + 1;
  83     r.y = drawcontext.y + 1;
  84     if(filled)
  85     {
  86         r.width = r.height = x + 1;
  87         XFillRectangles(disp, statusbar->drawable, drawcontext.gc, &r, 1);
  88     }
  89     else if(empty)
  90     {
  91         r.width = r.height = x;
  92         XDrawRectangles(disp, statusbar->drawable, drawcontext.gc, &r, 1);
  93     }
  94 }
  95
  96 unsigned int
  97 textnw(XFontSet set, XFontStruct *xfont, const char *text, unsigned int len)
  98 {
  99     XRectangle r;
 100
 101     if(set)
 102     {
 103         XmbTextExtents(set, text, len, NULL, &r);
 104         return r.width;
 105     }
 106     return XTextWidth(xfont, text, len);
 107 }
 108