draw.c

   1 /* (C)opyright MMVI-MMVII Anselm R. Garbe <garbeam at gmail dot com>
   2  * See LICENSE file for license details.
   3  */
   4 #include "dwm.h"
   5 #include <string.h>
   6
   7 /* static */
   8
   9 static void
  10 drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]) {
  11         int x;
  12         XGCValues gcv;
  13         XRectangle r = { dc.x, dc.y, dc.w, dc.h };
  14
  15         gcv.foreground = col[ColFG];
  16         XChangeGC(dpy, dc.gc, GCForeground, &gcv);
  17         x = (dc.font.ascent + dc.font.descent + 2) / 4;
  18         r.x = dc.x + 1;
  19         r.y = dc.y + 1;
  20         if(filled) {
  21                 r.width = r.height = x + 1;
  22                 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
  23         }
  24         else if(empty) {
  25                 r.width = r.height = x;
  26                 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
  27         }
  28 }
  29
  30 static Bool
  31 isoccupied(unsigned int t) {
  32         Client *c;
  33
  34         for(c = clients; c; c = c->next)
  35                 if(c->tags[t])
  36                         return True;
  37         return False;
  38 }
  39
  40 static unsigned int
  41 textnw(const char *text, unsigned int len) {
  42         XRectangle r;
  43
  44         if(dc.font.set) {
  45                 XmbTextExtents(dc.font.set, text, len, NULL, &r);
  46                 return r.width;
  47         }
  48         return XTextWidth(dc.font.xfont, text, len);
  49 }
  50
  51 /* extern */
  52
  53 void
  54 drawstatus(void) {
  55         int i, x;
  56
  57         dc.x = dc.y = 0;
  58         for(i = 0; i < ntags; i++) {
  59                 dc.w = textw(tags[i]);
  60                 if(seltag[i]) {
  61                         drawtext(tags[i], dc.sel);
  62                         drawsquare(sel && sel->tags[i], isoccupied(i), dc.sel);
  63                 }
  64                 else {
  65                         drawtext(tags[i], dc.norm);
  66                         drawsquare(sel && sel->tags[i], isoccupied(i), dc.norm);
  67                 }
  68                 dc.x += dc.w;
  69         }
  70         dc.w = blw;
  71         drawtext(lt->symbol, dc.norm);
  72         x = dc.x + dc.w;
  73         dc.w = textw(stext);
  74         dc.x = sw - dc.w;
  75         if(dc.x < x) {
  76                 dc.x = x;
  77                 dc.w = sw - x;
  78         }
  79         drawtext(stext, dc.norm);
  80         if((dc.w = dc.x - x) > bh) {
  81                 dc.x = x;
  82                 drawtext(sel ? sel->name : NULL, sel ? dc.sel : dc.norm);
  83         }
  84         XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, sw, bh, 0, 0);
  85         XSync(dpy, False);
  86 }
  87
  88 void
  89 drawtext(const char *text, unsigned long col[ColLast]) {
  90         int x, y, w, h;
  91         static char buf[256];
  92         unsigned int len, olen;
  93         XGCValues gcv;
  94         XRectangle r = { dc.x, dc.y, dc.w, dc.h };
  95
  96         XSetForeground(dpy, dc.gc, col[ColBG]);
  97         XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
  98         if(!text)
  99                 return;
 100         w = 0;
 101         olen = len = strlen(text);
 102         if(len >= sizeof buf)
 103                 len = sizeof buf - 1;
 104         memcpy(buf, text, len);
 105         buf[len] = 0;
 106         h = dc.font.ascent + dc.font.descent;
 107         y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
 108         x = dc.x + (h / 2);
 109         /* shorten text if necessary */
 110         while(len && (w = textnw(buf, len)) > dc.w - h)
 111                 buf[--len] = 0;
 112         if(len < olen) {
 113                 if(len > 1)
 114                         buf[len - 1] = '.';
 115                 if(len > 2)
 116                         buf[len - 2] = '.';
 117                 if(len > 3)
 118                         buf[len - 3] = '.';
 119         }
 120         if(w > dc.w)
 121                 return; /* too long */
 122         gcv.foreground = col[ColFG];
 123         if(dc.font.set) {
 124                 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
 125                 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
 126         }
 127         else {
 128                 gcv.font = dc.font.xfont->fid;
 129                 XChangeGC(dpy, dc.gc, GCForeground | GCFont, &gcv);
 130                 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
 131         }
 132 }
 133
 134 unsigned int
 135 textw(const char *text) {
 136         return textnw(text, strlen(text)) + dc.font.height;
 137 }