bar.c

   1 /* See LICENSE file for copyright and license details. */
   2 #include "dwm.h"
   3 #include <string.h>
   4 #include <stdio.h>
   5
   6 /* static */
   7
   8 static void
   9 drawsquare(Bool filled, Bool empty, unsigned long col[ColLast]) {
  10         int x;
  11         XGCValues gcv;
  12         XRectangle r = { dc.x, dc.y, dc.w, dc.h };
  13
  14         gcv.foreground = col[ColFG];
  15         XChangeGC(dpy, dc.gc, GCForeground, &gcv);
  16         x = (dc.font.ascent + dc.font.descent + 2) / 4;
  17         r.x = dc.x + 1;
  18         r.y = dc.y + 1;
  19         if(filled) {
  20                 r.width = r.height = x + 1;
  21                 XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
  22         }
  23         else if(empty) {
  24                 r.width = r.height = x;
  25                 XDrawRectangles(dpy, dc.drawable, dc.gc, &r, 1);
  26         }
  27 }
  28
  29 static unsigned long
  30 initcolor(const char *colstr) {
  31         Colormap cmap = DefaultColormap(dpy, screen);
  32         XColor color;
  33
  34         if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
  35                 eprint("error, cannot allocate color '%s'\n", colstr);
  36         return color.pixel;
  37 }
  38
  39 static void
  40 initfont(const char *fontstr) {
  41         char *def, **missing;
  42         int i, n;
  43
  44         missing = NULL;
  45         if(dc.font.set)
  46                 XFreeFontSet(dpy, dc.font.set);
  47         dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
  48         if(missing) {
  49                 while(n--)
  50                         fprintf(stderr, "dwm: missing fontset: %s\n", missing[n]);
  51                 XFreeStringList(missing);
  52         }
  53         if(dc.font.set) {
  54                 XFontSetExtents *font_extents;
  55                 XFontStruct **xfonts;
  56                 char **font_names;
  57                 dc.font.ascent = dc.font.descent = 0;
  58                 font_extents = XExtentsOfFontSet(dc.font.set);
  59                 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
  60                 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
  61                         if(dc.font.ascent < (*xfonts)->ascent)
  62                                 dc.font.ascent = (*xfonts)->ascent;
  63                         if(dc.font.descent < (*xfonts)->descent)
  64                                 dc.font.descent = (*xfonts)->descent;
  65                         xfonts++;
  66                 }
  67         }
  68         else {
  69                 if(dc.font.xfont)
  70                         XFreeFont(dpy, dc.font.xfont);
  71                 dc.font.xfont = NULL;
  72                 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
  73                 || !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
  74                         eprint("error, cannot load font: '%s'\n", fontstr);
  75                 dc.font.ascent = dc.font.xfont->ascent;
  76                 dc.font.descent = dc.font.xfont->descent;
  77         }
  78         dc.font.height = dc.font.ascent + dc.font.descent;
  79 }
  80
  81 static Bool
  82 isoccupied(unsigned int t) {
  83         Client *c;
  84
  85         for(c = clients; c; c = c->next)
  86                 if(c->tags[t])
  87                         return True;
  88         return False;
  89 }
  90
  91 static unsigned int
  92 textnw(const char *text, unsigned int len) {
  93         XRectangle r;
  94
  95         if(dc.font.set) {
  96                 XmbTextExtents(dc.font.set, text, len, NULL, &r);
  97                 return r.width;
  98         }
  99         return XTextWidth(dc.font.xfont, text, len);
 100 }
 101
 102 static void
 103 drawtext(const char *text, unsigned long col[ColLast]) {
 104         int x, y, w, h;
 105         static char buf[256];
 106         unsigned int len, olen;
 107         XRectangle r = { dc.x, dc.y, dc.w, dc.h };
 108
 109         XSetForeground(dpy, dc.gc, col[ColBG]);
 110         XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
 111         if(!text)
 112                 return;
 113         w = 0;
 114         olen = len = strlen(text);
 115         if(len >= sizeof buf)
 116                 len = sizeof buf - 1;
 117         memcpy(buf, text, len);
 118         buf[len] = 0;
 119         h = dc.font.ascent + dc.font.descent;
 120         y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
 121         x = dc.x + (h / 2);
 122         /* shorten text if necessary */
 123         while(len && (w = textnw(buf, len)) > dc.w - h)
 124                 buf[--len] = 0;
 125         if(len < olen) {
 126                 if(len > 1)
 127                         buf[len - 1] = '.';
 128                 if(len > 2)
 129                         buf[len - 2] = '.';
 130                 if(len > 3)
 131                         buf[len - 3] = '.';
 132         }
 133         if(w > dc.w)
 134                 return; /* too long */
 135         XSetForeground(dpy, dc.gc, col[ColFG]);
 136         if(dc.font.set)
 137                 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
 138         else
 139                 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
 140 }
 141
 142 /* extern */
 143
 144 unsigned int bh;
 145 unsigned int bpos = BARPOS;
 146 DC dc = {0};
 147 Window barwin;
 148
 149 void
 150 drawbar(void) {
 151         int i, x;
 152
 153         dc.x = dc.y = 0;
 154         for(i = 0; i < ntags; i++) {
 155                 dc.w = textw(tags[i]);
 156                 if(seltags[i]) {
 157                         drawtext(tags[i], dc.sel);
 158                         drawsquare(sel && sel->tags[i], isoccupied(i), dc.sel);
 159                 }
 160                 else {
 161                         drawtext(tags[i], dc.norm);
 162                         drawsquare(sel && sel->tags[i], isoccupied(i), dc.norm);
 163                 }
 164                 dc.x += dc.w;
 165         }
 166         dc.w = blw;
 167         drawtext(getsymbol(), dc.norm);
 168         x = dc.x + dc.w;
 169         dc.w = textw(stext);
 170         dc.x = sw - dc.w;
 171         if(dc.x < x) {
 172                 dc.x = x;
 173                 dc.w = sw - x;
 174         }
 175         drawtext(stext, dc.norm);
 176         if((dc.w = dc.x - x) > bh) {
 177                 dc.x = x;
 178                 if(sel) {
 179                         drawtext(sel->name, dc.sel);
 180                         drawsquare(sel->ismax, sel->isfloating, dc.sel);
 181                 }
 182                 else
 183                         drawtext(NULL, dc.norm);
 184         }
 185         XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, sw, bh, 0, 0);
 186         XSync(dpy, False);
 187 }
 188
 189 void
 190 initstyle(void) {
 191         dc.norm[ColBorder] = initcolor(NORMBORDERCOLOR);
 192         dc.norm[ColBG] = initcolor(NORMBGCOLOR);
 193         dc.norm[ColFG] = initcolor(NORMFGCOLOR);
 194         dc.sel[ColBorder] = initcolor(SELBORDERCOLOR);
 195         dc.sel[ColBG] = initcolor(SELBGCOLOR);
 196         dc.sel[ColFG] = initcolor(SELFGCOLOR);
 197         initfont(FONT);
 198         dc.h = bh = dc.font.height + 2;
 199 }
 200
 201 void
 202 initbar(void) {
 203         XSetWindowAttributes wa;
 204
 205         wa.override_redirect = 1;
 206         wa.background_pixmap = ParentRelative;
 207         wa.event_mask = ButtonPressMask | ExposureMask;
 208         barwin = XCreateWindow(dpy, root, sx, sy, sw, bh, 0,
 209                         DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
 210                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
 211         XDefineCursor(dpy, barwin, cursor[CurNormal]);
 212         updatebarpos();
 213         XMapRaised(dpy, barwin);
 214         strcpy(stext, "dwm-"VERSION);
 215         dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
 216         dc.gc = XCreateGC(dpy, root, 0, 0);
 217         XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
 218         if(!dc.font.set)
 219                 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
 220 }
 221
 222 unsigned int
 223 textw(const char *text) {
 224         return textnw(text, strlen(text)) + dc.font.height;
 225 }
 226
 227 void
 228 togglebar(const char *arg) {
 229         if(bpos == BarOff)
 230                 bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
 231         else
 232                 bpos = BarOff;
 233         updatebarpos();
 234         arrange();
 235 }
 236
 237 void
 238 updatebarpos(void) {
 239         XEvent ev;
 240
 241         wax = sx;
 242         way = sy;
 243         wah = sh;
 244         waw = sw;
 245         switch(bpos) {
 246         default:
 247                 wah -= bh;
 248                 way += bh;
 249                 XMoveWindow(dpy, barwin, sx, sy);
 250                 break;
 251         case BarBot:
 252                 wah -= bh;
 253                 XMoveWindow(dpy, barwin, sx, sy + wah);
 254                 break;
 255         case BarOff:
 256                 XMoveWindow(dpy, barwin, sx, sy - bh);
 257                 break;
 258         }
 259         XSync(dpy, False);
 260         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
 261 }
 262
 263