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