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 drawcaret(unsigned long col[ColLast]) {
  11         int x;
  12         XGCValues gcv;
  13         XPoint pt[3];
  14
  15         gcv.foreground = col[ColFG];
  16         XChangeGC(dpy, dc.gc, GCForeground, &gcv);
  17         x = (dc.font.ascent + dc.font.descent) / 2;
  18         pt[0].x = dc.x + 1;
  19         pt[0].y = dc.y + 1 + x;
  20         pt[1].x = 0;
  21         pt[1].y = -x;
  22         pt[2].x = x;
  23         pt[2].y = 0;
  24         XDrawLines(dpy, dc.drawable, dc.gc, pt, 3, CoordModePrevious);
  25 }
  26
  27 static void
  28 drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]) {
  29         int x;
  30         XGCValues gcv;
  31         XRectangle r = { dc.x, dc.y, dc.w, dc.h };
  32
  33         gcv.foreground = col[ColFG];
  34         XChangeGC(dpy, dc.gc, GCForeground, &gcv);
  35         x = (dc.font.ascent + dc.font.descent + 2) / 4;
  36         r.x = dc.x + 1;
  37         r.y = dc.y + 1;
  38         if(filled) {
  39                 r.width = r.height = x + 1;
  40                 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
  41         }
  42         else if(empty) {
  43                 r.width = r.height = x;
  44                 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
  45         }
  46 }
  47
  48 static Bool
  49 isoccupied(unsigned int t) {
  50         Client *c;
  51
  52         for(c = clients; c; c = c->next)
  53                 if(c->tags[t])
  54                         return True;
  55         return False;
  56 }
  57
  58 static unsigned int
  59 textnw(const char *text, unsigned int len) {
  60         XRectangle r;
  61
  62         if(dc.font.set) {
  63                 XmbTextExtents(dc.font.set, text, len, NULL, &r);
  64                 return r.width;
  65         }
  66         return XTextWidth(dc.font.xfont, text, len);
  67 }
  68
  69 /* extern */
  70
  71 void
  72 drawstatus(void) {
  73         int i, x;
  74
  75         dc.x = dc.y = 0;
  76         for(i = 0; i < ntags; i++) {
  77                 dc.w = textw(tags[i]);
  78                 if(seltag[i]) {
  79                         drawtext(tags[i], dc.sel);
  80                         drawsquare(sel && sel->tags[i], isoccupied(i), dc.sel);
  81                 }
  82                 else {
  83                         drawtext(tags[i], dc.norm);
  84                         drawsquare(sel && sel->tags[i], isoccupied(i), dc.norm);
  85                 }
  86                 dc.x += dc.w;
  87         }
  88         dc.w = blw;
  89         drawtext(lt->symbol, dc.norm);
  90         x = dc.x + dc.w;
  91         dc.w = textw(stext);
  92         dc.x = sw - dc.w;
  93         if(dc.x < x) {
  94                 dc.x = x;
  95                 dc.w = sw - x;
  96         }
  97         drawtext(stext, dc.norm);
  98         if((dc.w = dc.x - x) > bh) {
  99                 dc.x = x;
 100                 if(sel) {
 101                         drawtext(sel->name, dc.sel);
 102                         if(sel->isversatile)
 103                                 drawcaret(dc.sel);
 104                 }
 105                 else
 106                         drawtext(NULL, dc.norm);
 107         }
 108         XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, sw, bh, 0, 0);
 109         XSync(dpy, False);
 110 }
 111
 112 void
 113 drawtext(const char *text, unsigned long col[ColLast]) {
 114         int x, y, w, h;
 115         static char buf[256];
 116         unsigned int len, olen;
 117         XGCValues gcv;
 118         XRectangle r = { dc.x, dc.y, dc.w, dc.h };
 119
 120         XSetForeground(dpy, dc.gc, col[ColBG]);
 121         XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
 122         if(!text)
 123                 return;
 124         w = 0;
 125         olen = len = strlen(text);
 126         if(len >= sizeof buf)
 127                 len = sizeof buf - 1;
 128         memcpy(buf, text, len);
 129         buf[len] = 0;
 130         h = dc.font.ascent + dc.font.descent;
 131         y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
 132         x = dc.x + (h / 2);
 133         /* shorten text if necessary */
 134         while(len && (w = textnw(buf, len)) > dc.w - h)
 135                 buf[--len] = 0;
 136         if(len < olen) {
 137                 if(len > 1)
 138                         buf[len - 1] = '.';
 139                 if(len > 2)
 140                         buf[len - 2] = '.';
 141                 if(len > 3)
 142                         buf[len - 3] = '.';
 143         }
 144         if(w > dc.w)
 145                 return; /* too long */
 146         gcv.foreground = col[ColFG];
 147         if(dc.font.set) {
 148                 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
 149                 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
 150         }
 151         else {
 152                 gcv.font = dc.font.xfont->fid;
 153                 XChangeGC(dpy, dc.gc, GCForeground | GCFont, &gcv);
 154                 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
 155         }
 156 }
 157
 158 unsigned int
 159 textw(const char *text) {
 160         return textnw(text, strlen(text)) + dc.font.height;
 161 }