draw.c

   1 /* (C)opyright MMIV-MMVII Anselm R. Garbe <garbeam at gmail dot com>
   2  * See LICENSE file for license details.
   3  */
   4 #include "dwm.h"
   5 #include <stdio.h>
   6 #include <string.h>
   7
   8 /* static */
   9
  10 static Bool
  11 isoccupied(unsigned int t)
  12 {
  13         Client *c;
  14         for(c = clients; c; c = c->next)
  15                 if(c->tags[t])
  16                         return True;
  17         return False;
  18 }
  19
  20 static unsigned int
  21 textnw(const char *text, unsigned int len) {
  22         XRectangle r;
  23
  24         if(dc.font.set) {
  25                 XmbTextExtents(dc.font.set, text, len, NULL, &r);
  26                 return r.width;
  27         }
  28         return XTextWidth(dc.font.xfont, text, len);
  29 }
  30
  31 static void
  32 drawtext(const char *text, unsigned long col[ColLast], Bool filledsquare, Bool emptysquare) {
  33         int x, y, w, h;
  34         static char buf[256];
  35         unsigned int len, olen;
  36         XGCValues gcv;
  37         XRectangle r = { dc.x, dc.y, dc.w, dc.h };
  38         XPoint pt[5];
  39
  40         XSetForeground(dpy, dc.gc, col[ColBG]);
  41         XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
  42         if(!text)
  43                 return;
  44         w = 0;
  45         olen = len = strlen(text);
  46         if(len >= sizeof buf)
  47                 len = sizeof buf - 1;
  48         memcpy(buf, text, len);
  49         buf[len] = 0;
  50         h = dc.font.ascent + dc.font.descent;
  51         y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
  52         x = dc.x + (h / 2);
  53         /* shorten text if necessary */
  54         while(len && (w = textnw(buf, len)) > dc.w - h)
  55                 buf[--len] = 0;
  56         if(len < olen) {
  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         if(w > dc.w)
  65                 return; /* too long */
  66         gcv.foreground = col[ColFG];
  67         if(dc.font.set) {
  68                 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
  69                 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
  70         }
  71         else {
  72                 gcv.font = dc.font.xfont->fid;
  73                 XChangeGC(dpy, dc.gc, GCForeground | GCFont, &gcv);
  74                 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
  75         }
  76         x = (h + 2) / 4;
  77         if(filledsquare) {
  78                 r.x = dc.x + 1;
  79                 r.y = dc.y + 1;
  80                 r.width = r.height = x + 1;
  81                 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
  82         }
  83         else if(emptysquare) {
  84                 pt[0].x = dc.x + 1;
  85                 pt[0].y = dc.y + 1;
  86                 pt[1].x = x;
  87                 pt[1].y = 0;
  88                 pt[2].x = 0;
  89                 pt[2].y = x;
  90                 pt[3].x = -x;
  91                 pt[3].y = 0;
  92                 pt[4].x = 0;
  93                 pt[4].y = -x;
  94                 XDrawLines(dpy, dc.drawable, dc.gc, pt, 5, CoordModePrevious);
  95         }
  96 }
  97
  98 /* extern */
  99
 100 void
 101 drawstatus(void) {
 102         int i, x;
 103
 104         dc.x = dc.y = 0;
 105         for(i = 0; i < ntags; i++) {
 106                 dc.w = textw(tags[i]);
 107                 if(seltag[i])
 108                         drawtext(tags[i], dc.sel, sel && sel->tags[i], isoccupied(i));
 109                 else
 110                         drawtext(tags[i], dc.norm, sel && sel->tags[i], isoccupied(i));
 111                 dc.x += dc.w;
 112         }
 113         dc.w = bmw;
 114         drawtext(arrange == dofloat ? FLOATSYMBOL : TILESYMBOL, dc.norm, False, False);
 115         x = dc.x + dc.w;
 116         dc.w = textw(stext);
 117         dc.x = sw - dc.w;
 118         if(dc.x < x) {
 119                 dc.x = x;
 120                 dc.w = sw - x;
 121         }
 122         drawtext(stext, dc.norm, False, False);
 123         if((dc.w = dc.x - x) > bh) {
 124                 dc.x = x;
 125                 drawtext(sel ? sel->name : NULL, sel ? dc.sel : dc.norm, False, False);
 126         }
 127         XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, sw, bh, 0, 0);
 128         XSync(dpy, False);
 129 }
 130
 131 unsigned long
 132 getcolor(const char *colstr) {
 133         Colormap cmap = DefaultColormap(dpy, screen);
 134         XColor color;
 135
 136         if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
 137                 eprint("error, cannot allocate color '%s'\n", colstr);
 138         return color.pixel;
 139 }
 140
 141 void
 142 setfont(const char *fontstr) {
 143         char *def, **missing;
 144         int i, n;
 145
 146         missing = NULL;
 147         if(dc.font.set)
 148                 XFreeFontSet(dpy, dc.font.set);
 149         dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
 150         if(missing) {
 151                 while(n--)
 152                         fprintf(stderr, "missing fontset: %s\n", missing[n]);
 153                 XFreeStringList(missing);
 154         }
 155         if(dc.font.set) {
 156                 XFontSetExtents *font_extents;
 157                 XFontStruct **xfonts;
 158                 char **font_names;
 159                 dc.font.ascent = dc.font.descent = 0;
 160                 font_extents = XExtentsOfFontSet(dc.font.set);
 161                 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
 162                 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
 163                         if(dc.font.ascent < (*xfonts)->ascent)
 164                                 dc.font.ascent = (*xfonts)->ascent;
 165                         if(dc.font.descent < (*xfonts)->descent)
 166                                 dc.font.descent = (*xfonts)->descent;
 167                         xfonts++;
 168                 }
 169         }
 170         else {
 171                 if(dc.font.xfont)
 172                         XFreeFont(dpy, dc.font.xfont);
 173                 dc.font.xfont = NULL;
 174                 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr)))
 175                         eprint("error, cannot load font: '%s'\n", fontstr);
 176                 dc.font.ascent = dc.font.xfont->ascent;
 177                 dc.font.descent = dc.font.xfont->descent;
 178         }
 179         dc.font.height = dc.font.ascent + dc.font.descent;
 180 }
 181
 182 unsigned int
 183 textw(const char *text) {
 184         return textnw(text, strlen(text)) + dc.font.height;
 185 }