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                         eprint("error, cannot load font: '%s'\n", fontstr);
  74                 dc.font.ascent = dc.font.xfont->ascent;
  75                 dc.font.descent = dc.font.xfont->descent;
  76         }
  77         dc.font.height = dc.font.ascent + dc.font.descent;
  78 }
  79
  80 static Bool
  81 isoccupied(unsigned int t) {
  82         Client *c;
  83
  84         for(c = clients; c; c = c->next)
  85                 if(c->tags[t])
  86                         return True;
  87         return False;
  88 }
  89
  90 static unsigned int
  91 textnw(const char *text, unsigned int len) {
  92         XRectangle r;
  93
  94         if(dc.font.set) {
  95                 XmbTextExtents(dc.font.set, text, len, NULL, &r);
  96                 return r.width;
  97         }
  98         return XTextWidth(dc.font.xfont, text, len);
  99 }
 100
 101 static void
 102 drawtext(const char *text, unsigned long col[ColLast]) {
 103         int x, y, w, h;
 104         static char buf[256];
 105         unsigned int len, olen;
 106         XRectangle r = { dc.x, dc.y, dc.w, dc.h };
 107
 108         XSetForeground(dpy, dc.gc, col[ColBG]);
 109         XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
 110         if(!text)
 111                 return;
 112         w = 0;
 113         olen = len = strlen(text);
 114         if(len >= sizeof buf)
 115                 len = sizeof buf - 1;
 116         memcpy(buf, text, len);
 117         buf[len] = 0;
 118         h = dc.font.ascent + dc.font.descent;
 119         y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
 120         x = dc.x + (h / 2);
 121         /* shorten text if necessary */
 122         while(len && (w = textnw(buf, len)) > dc.w - h)
 123                 buf[--len] = 0;
 124         if(len < olen) {
 125                 if(len > 1)
 126                         buf[len - 1] = '.';
 127                 if(len > 2)
 128                         buf[len - 2] = '.';
 129                 if(len > 3)
 130                         buf[len - 3] = '.';
 131         }
 132         if(w > dc.w)
 133                 return; /* too long */
 134         XSetForeground(dpy, dc.gc, col[ColFG]);
 135         if(dc.font.set)
 136                 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
 137         else
 138                 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
 139 }
 140
 141 /* extern */
 142
 143 unsigned int bh;
 144 unsigned int bpos = BARPOS;
 145 DC dc = {0};
 146 Window barwin;
 147
 148 void
 149 drawbar(void) {
 150         int i, x;
 151
 152         dc.x = dc.y = 0;
 153         for(i = 0; i < ntags; i++) {
 154                 dc.w = textw(tags[i]);
 155                 if(seltags[i]) {
 156                         drawtext(tags[i], dc.sel);
 157                         drawsquare(sel && sel->tags[i], isoccupied(i), dc.sel);
 158                 }
 159                 else {
 160                         drawtext(tags[i], dc.norm);
 161                         drawsquare(sel && sel->tags[i], isoccupied(i), dc.norm);
 162                 }
 163                 dc.x += dc.w;
 164         }
 165         dc.w = blw;
 166         drawtext(getsymbol(), dc.norm);
 167         x = dc.x + dc.w;
 168         dc.w = textw(stext);
 169         dc.x = sw - dc.w;
 170         if(dc.x < x) {
 171                 dc.x = x;
 172                 dc.w = sw - x;
 173         }
 174         drawtext(stext, dc.norm);
 175         if((dc.w = dc.x - x) > bh) {
 176                 dc.x = x;
 177                 if(sel) {
 178                         drawtext(sel->name, dc.sel);
 179                         drawsquare(sel->ismax, sel->isfloating, dc.sel);
 180                 }
 181                 else
 182                         drawtext(NULL, dc.norm);
 183         }
 184         XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, sw, bh, 0, 0);
 185         XSync(dpy, False);
 186 }
 187
 188 void
 189 initbar(void) {
 190         XSetWindowAttributes wa;
 191
 192         dc.norm[ColBorder] = initcolor(NORMBORDERCOLOR);
 193         dc.norm[ColBG] = initcolor(NORMBGCOLOR);
 194         dc.norm[ColFG] = initcolor(NORMFGCOLOR);
 195         dc.sel[ColBorder] = initcolor(SELBORDERCOLOR);
 196         dc.sel[ColBG] = initcolor(SELBGCOLOR);
 197         dc.sel[ColFG] = initcolor(SELFGCOLOR);
 198         initfont(FONT);
 199         dc.h = bh = dc.font.height + 2;
 200         wa.override_redirect = 1;
 201         wa.background_pixmap = ParentRelative;
 202         wa.event_mask = ButtonPressMask | ExposureMask;
 203         barwin = XCreateWindow(dpy, root, sx, sy, sw, bh, 0,
 204                         DefaultDepth(dpy, screen), CopyFromParent, DefaultVisual(dpy, screen),
 205                         CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
 206         XDefineCursor(dpy, barwin, cursor[CurNormal]);
 207         updatebarpos();
 208         XMapRaised(dpy, barwin);
 209         strcpy(stext, "dwm-"VERSION);
 210         dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
 211         dc.gc = XCreateGC(dpy, root, 0, 0);
 212         XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
 213         if(!dc.font.set)
 214                 XSetFont(dpy, dc.gc, dc.font.xfont->fid);
 215 }
 216
 217 unsigned int
 218 textw(const char *text) {
 219         return textnw(text, strlen(text)) + dc.font.height;
 220 }
 221
 222 void
 223 togglebar(const char *arg) {
 224         if(bpos == BarOff)
 225                 bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
 226         else
 227                 bpos = BarOff;
 228         updatebarpos();
 229         arrange();
 230 }
 231
 232 void
 233 updatebarpos(void) {
 234         XEvent ev;
 235
 236         wax = sx;
 237         way = sy;
 238         wah = sh;
 239         waw = sw;
 240         switch(bpos) {
 241         default:
 242                 wah -= bh;
 243                 way += bh;
 244                 XMoveWindow(dpy, barwin, sx, sy);
 245                 break;
 246         case BarBot:
 247                 wah -= bh;
 248                 XMoveWindow(dpy, barwin, sx, sy + wah);
 249                 break;
 250         case BarOff:
 251                 XMoveWindow(dpy, barwin, sx, sy - bh);
 252                 break;
 253         }
 254         XSync(dpy, False);
 255         while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
 256 }
 257
 258