draw.c

   1 /* (C)opyright MMIV-MMVI 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 drawall(void) {
 102         Client *c;
 103
 104         for(c = clients; c; c = getnext(c->next))
 105                 drawtitle(c);
 106         drawstatus();
 107 }
 108
 109 void
 110 drawstatus(void) {
 111         int i, x;
 112
 113         dc.x = dc.y = 0;
 114         for(i = 0; i < ntags; i++) {
 115                 dc.w = textw(tags[i]);
 116                 if(seltag[i])
 117                         drawtext(tags[i], dc.sel, sel && sel->tags[i], isoccupied(i));
 118                 else
 119                         drawtext(tags[i], dc.norm, sel && sel->tags[i], isoccupied(i));
 120                 dc.x += dc.w;
 121         }
 122         dc.w = bmw;
 123         drawtext(arrange == dofloat ?  FLOATSYMBOL : TILESYMBOL, dc.status, False, False);
 124         x = dc.x + dc.w;
 125         dc.w = textw(stext);
 126         dc.x = bw - dc.w;
 127         if(dc.x < x) {
 128                 dc.x = x;
 129                 dc.w = bw - x;
 130         }
 131         drawtext(stext, dc.status, False, False);
 132         if((dc.w = dc.x - x) > bh) {
 133                 dc.x = x;
 134                 drawtext(sel ? sel->name : NULL, sel ? dc.sel : dc.norm, False, False);
 135         }
 136         XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, bw, bh, 0, 0);
 137         XSync(dpy, False);
 138 }
 139
 140 void
 141 drawtitle(Client *c) {
 142         if(c == sel && issel) {
 143                 drawstatus();
 144                 XUnmapWindow(dpy, c->twin);
 145                 XSetWindowBorder(dpy, c->win, dc.sel[ColBG]);
 146                 return;
 147         }
 148         XSetWindowBorder(dpy, c->win, dc.norm[ColBG]);
 149         XMapWindow(dpy, c->twin);
 150         dc.x = dc.y = 0;
 151         dc.w = c->tw;
 152         drawtext(c->name, dc.norm, False,False);
 153         XCopyArea(dpy, dc.drawable, c->twin, dc.gc, 0, 0, c->tw, c->th, 0, 0);
 154         XSync(dpy, False);
 155 }
 156
 157 unsigned long
 158 getcolor(const char *colstr) {
 159         Colormap cmap = DefaultColormap(dpy, screen);
 160         XColor color;
 161
 162         if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
 163                 eprint("error, cannot allocate color '%s'\n", colstr);
 164         return color.pixel;
 165 }
 166
 167 void
 168 setfont(const char *fontstr) {
 169         char *def, **missing;
 170         int i, n;
 171
 172         missing = NULL;
 173         if(dc.font.set)
 174                 XFreeFontSet(dpy, dc.font.set);
 175         dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
 176         if(missing) {
 177                 while(n--)
 178                         fprintf(stderr, "missing fontset: %s\n", missing[n]);
 179                 XFreeStringList(missing);
 180         }
 181         if(dc.font.set) {
 182                 XFontSetExtents *font_extents;
 183                 XFontStruct **xfonts;
 184                 char **font_names;
 185                 dc.font.ascent = dc.font.descent = 0;
 186                 font_extents = XExtentsOfFontSet(dc.font.set);
 187                 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
 188                 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
 189                         if(dc.font.ascent < (*xfonts)->ascent)
 190                                 dc.font.ascent = (*xfonts)->ascent;
 191                         if(dc.font.descent < (*xfonts)->descent)
 192                                 dc.font.descent = (*xfonts)->descent;
 193                         xfonts++;
 194                 }
 195         }
 196         else {
 197                 if(dc.font.xfont)
 198                         XFreeFont(dpy, dc.font.xfont);
 199                 dc.font.xfont = NULL;
 200                 if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr)))
 201                         eprint("error, cannot init 'fixed' font\n");
 202                 dc.font.ascent = dc.font.xfont->ascent;
 203                 dc.font.descent = dc.font.xfont->descent;
 204         }
 205         dc.font.height = dc.font.ascent + dc.font.descent;
 206 }
 207
 208 unsigned int
 209 textw(const char *text) {
 210         return textnw(text, strlen(text)) + dc.font.height;
 211 }