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
  39         XSetForeground(dpy, dc.gc, col[ColBG]);
  40         XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
  41         if(!text)
  42                 return;
  43         w = 0;
  44         olen = len = strlen(text);
  45         if(len >= sizeof buf)
  46                 len = sizeof buf - 1;
  47         memcpy(buf, text, len);
  48         buf[len] = 0;
  49         h = dc.font.ascent + dc.font.descent;
  50         y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
  51         x = dc.x + (h / 2);
  52         /* shorten text if necessary */
  53         while(len && (w = textnw(buf, len)) > dc.w - h)
  54                 buf[--len] = 0;
  55         if(len < olen) {
  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         if(w > dc.w)
  64                 return; /* too long */
  65         gcv.foreground = col[ColFG];
  66         if(dc.font.set) {
  67                 XChangeGC(dpy, dc.gc, GCForeground, &gcv);
  68                 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
  69         }
  70         else {
  71                 gcv.font = dc.font.xfont->fid;
  72                 XChangeGC(dpy, dc.gc, GCForeground | GCFont, &gcv);
  73                 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
  74         }
  75         x = (h + 2) / 4;
  76         r.x = dc.x + 1;
  77         r.y = dc.y + 1;
  78         if(filledsquare) {
  79                 r.width = r.height = x + 1;
  80                 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
  81         }
  82         else if(emptysquare) {
  83                 r.width = r.height = x;
  84                 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
  85         }
  86 }
  87
  88 /* extern */
  89
  90 void
  91 drawstatus(void) {
  92         int i, x;
  93
  94         dc.x = dc.y = 0;
  95         for(i = 0; i < ntags; i++) {
  96                 dc.w = textw(tags[i]);
  97                 if(seltag[i])
  98                         drawtext(tags[i], dc.sel, sel && sel->tags[i], isoccupied(i));
  99                 else
 100                         drawtext(tags[i], dc.norm, sel && sel->tags[i], isoccupied(i));
 101                 dc.x += dc.w;
 102         }
 103         dc.w = bmw;
 104         drawtext(arrange == dofloat ? FLOATSYMBOL : TILESYMBOL, dc.norm, False, False);
 105         x = dc.x + dc.w;
 106         dc.w = textw(stext);
 107         dc.x = sw - dc.w;
 108         if(dc.x < x) {
 109                 dc.x = x;
 110                 dc.w = sw - x;
 111         }
 112         drawtext(stext, dc.norm, False, False);
 113         if((dc.w = dc.x - x) > bh) {
 114                 dc.x = x;
 115                 drawtext(sel ? sel->name : NULL, sel ? dc.sel : dc.norm, False, False);
 116         }
 117         XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, sw, bh, 0, 0);
 118         XSync(dpy, False);
 119 }
 120
 121 unsigned long
 122 getcolor(const char *colstr) {
 123         Colormap cmap = DefaultColormap(dpy, screen);
 124         XColor color;
 125
 126         if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
 127                 eprint("error, cannot allocate color '%s'\n", colstr);
 128         return color.pixel;
 129 }
 130
 131 void
 132 setfont(const char *fontstr) {
 133         char *def, **missing;
 134         int i, n;
 135
 136         missing = NULL;
 137         if(dc.font.set)
 138                 XFreeFontSet(dpy, dc.font.set);
 139         dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
 140         if(missing) {
 141                 while(n--)
 142                         fprintf(stderr, "missing fontset: %s\n", missing[n]);
 143                 XFreeStringList(missing);
 144         }
 145         if(dc.font.set) {
 146                 XFontSetExtents *font_extents;
 147                 XFontStruct **xfonts;
 148                 char **font_names;
 149                 dc.font.ascent = dc.font.descent = 0;
 150                 font_extents = XExtentsOfFontSet(dc.font.set);
 151                 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
 152                 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
 153                         if(dc.font.ascent < (*xfonts)->ascent)
 154                                 dc.font.ascent = (*xfonts)->ascent;
 155                         if(dc.font.descent < (*xfonts)->descent)
 156                                 dc.font.descent = (*xfonts)->descent;
 157                         xfonts++;
 158                 }
 159         }
 160         else {
 161                 if(dc.font.xfont)
 162                         XFreeFont(dpy, dc.font.xfont);
 163                 dc.font.xfont = NULL;
 164                 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr)))
 165                         eprint("error, cannot load font: '%s'\n", fontstr);
 166                 dc.font.ascent = dc.font.xfont->ascent;
 167                 dc.font.descent = dc.font.xfont->descent;
 168         }
 169         dc.font.height = dc.font.ascent + dc.font.descent;
 170 }
 171
 172 unsigned int
 173 textw(const char *text) {
 174         return textnw(text, strlen(text)) + dc.font.height;
 175 }