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
  24 extern DC dc;                   /* global draw context */
  25 extern Client *clients, *sel, *stack;   /* global client list and stack */
  26
  27 /* static */
  28
  29 static void
  30 drawtext(Display *disp, const char *text, unsigned long col[ColLast])
  31 {
  32     int x, y, w, h;
  33     static char buf[256];
  34     unsigned int len, olen;
  35     XRectangle r = { dc.x, dc.y, dc.w, dc.h };
  36
  37     XSetForeground(disp, dc.gc, col[ColBG]);
  38     XFillRectangles(disp, dc.drawable, dc.gc, &r, 1);
  39     if(!text)
  40         return;
  41     w = 0;
  42     olen = len = a_strlen(text);
  43     if(len >= sizeof buf)
  44         len = sizeof buf - 1;
  45     memcpy(buf, text, len);
  46     buf[len] = 0;
  47     h = dc.font.ascent + dc.font.descent;
  48     y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
  49     x = dc.x + (h / 2);
  50     /* shorten text if necessary */
  51     while(len && (w = textnw(buf, len)) > dc.w - h)
  52         buf[--len] = 0;
  53     if(w > dc.w)
  54         return;                 /* too long */
  55     if(len < olen)
  56     {
  57         if(len > 1)
  58             buf[len - 1] = '.';
  59         if(len > 2)
  60             buf[len - 2] = '.';
  61         if(len > 3)
  62             buf[len - 3] = '.';
  63     }
  64     XSetForeground(disp, dc.gc, col[ColFG]);
  65     if(dc.font.set)
  66         XmbDrawString(disp, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
  67     else
  68         XDrawString(disp, dc.drawable, dc.gc, x, y, buf, len);
  69 }
  70
  71 static void
  72 drawsquare(Bool filled, Bool empty, unsigned long col[ColLast], Display *disp)
  73 {
  74     int x;
  75     XGCValues gcv;
  76     XRectangle r = { dc.x, dc.y, dc.w, dc.h };
  77
  78     gcv.foreground = col[ColFG];
  79     XChangeGC(disp, dc.gc, GCForeground, &gcv);
  80     x = (dc.font.ascent + dc.font.descent + 2) / 4;
  81     r.x = dc.x + 1;
  82     r.y = dc.y + 1;
  83     if(filled)
  84     {
  85         r.width = r.height = x + 1;
  86         XFillRectangles(disp, dc.drawable, dc.gc, &r, 1);
  87     }
  88     else if(empty)
  89     {
  90         r.width = r.height = x;
  91         XDrawRectangles(disp, dc.drawable, dc.gc, &r, 1);
  92     }
  93 }
  94
  95 /** Check if at least a client is tagged with tag number t
  96  * \param t tag number
  97  * \return True or False
  98  */
  99 static Bool
 100 isoccupied(unsigned int t)
 101 {
 102     Client *c;
 103
 104     for(c = clients; c; c = c->next)
 105         if(c->tags[t])
 106             return True;
 107     return False;
 108 }
 109
 110
 111 /* extern */
 112
 113 unsigned int
 114 textnw(const char *text, unsigned int len)
 115 {
 116     XRectangle r;
 117
 118     if(dc.font.set)
 119     {
 120         XmbTextExtents(dc.font.set, text, len, NULL, &r);
 121         return r.width;
 122     }
 123     return XTextWidth(dc.font.xfont, text, len);
 124 }
 125
 126 void
 127 drawstatus(Display *disp, awesome_config * awesomeconf)
 128 {
 129     int x, i;
 130     dc.x = dc.y = 0;
 131     for(i = 0; i < awesomeconf->ntags; i++)
 132     {
 133         dc.w = textw(awesomeconf->tags[i]);
 134         if(awesomeconf->selected_tags[i])
 135         {
 136             drawtext(disp, awesomeconf->tags[i], dc.sel);
 137             drawsquare(sel && sel->tags[i], isoccupied(i), dc.sel, disp);
 138         }
 139         else
 140         {
 141             drawtext(disp, awesomeconf->tags[i], dc.norm);
 142             drawsquare(sel && sel->tags[i], isoccupied(i), dc.norm, disp);
 143         }
 144         dc.x += dc.w;
 145     }
 146     dc.w = awesomeconf->statusbar.width;
 147     drawtext(disp, awesomeconf->current_layout->symbol, dc.norm);
 148     x = dc.x + dc.w;
 149     dc.w = textw(awesomeconf->statustext);
 150     dc.x = DisplayWidth(disp, DefaultScreen(disp)) - dc.w;
 151     if(dc.x < x)
 152     {
 153         dc.x = x;
 154         dc.w = DisplayWidth(disp, DefaultScreen(disp)) - x;
 155     }
 156     drawtext(disp, awesomeconf->statustext, dc.norm);
 157     if((dc.w = dc.x - x) > awesomeconf->statusbar.height)
 158     {
 159         dc.x = x;
 160         if(sel)
 161         {
 162             drawtext(disp, sel->name, dc.sel);
 163             drawsquare(sel->ismax, sel->isfloating, dc.sel, disp);
 164         }
 165         else
 166             drawtext(disp, NULL, dc.norm);
 167     }
 168     XCopyArea(disp, dc.drawable, awesomeconf->statusbar.window, dc.gc, 0, 0, DisplayWidth(disp, DefaultScreen(disp)), awesomeconf->statusbar.height, 0, 0);
 169     XSync(disp, False);
 170 }