draw.c

   1 /*
   2  * (C)opyright MMIV-MMVI Anselm R. Garbe <garbeam at gmail dot com>
   3  * See LICENSE file for license details.
   4  */
   5 #include "dwm.h"
   6 #include <stdio.h>
   7 #include <string.h>
   8 #include <X11/Xlocale.h>
   9
  10 /* static */
  11
  12 static unsigned int
  13 textnw(const char *text, unsigned int len)
  14 {
  15         XRectangle r;
  16
  17         if(dc.font.set) {
  18                 XmbTextExtents(dc.font.set, text, len, NULL, &r);
  19                 return r.width;
  20         }
  21         return XTextWidth(dc.font.xfont, text, len);
  22 }
  23
  24 static void
  25 drawtext(const char *text, Bool invert, Bool underline)
  26 {
  27         int x, y, w, h;
  28         static char buf[256];
  29         unsigned int len, olen;
  30         XGCValues gcv;
  31         XPoint points[5];
  32         XRectangle r = { dc.x, dc.y, dc.w, dc.h };
  33
  34         XSetForeground(dpy, dc.gc, invert ? dc.fg : dc.bg);
  35         XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
  36         points[0].x = dc.x;
  37         points[0].y = dc.y;
  38         points[1].x = dc.w - 1;
  39         points[1].y = 0;
  40         points[2].x = 0;
  41         points[2].y = dc.h - 1;
  42         points[3].x = -(dc.w - 1);
  43         points[3].y = 0;
  44         points[4].x = 0;
  45         points[4].y = -(dc.h - 1);
  46         XSetForeground(dpy, dc.gc, dc.border);
  47         XDrawLines(dpy, dc.drawable, dc.gc, points, 5, CoordModePrevious);
  48
  49         if(!text)
  50                 return;
  51
  52         w = 0;
  53         olen = len = strlen(text);
  54         if(len >= sizeof(buf))
  55                 len = sizeof(buf) - 1;
  56         memcpy(buf, text, len);
  57         buf[len] = 0;
  58
  59         h = dc.font.ascent + dc.font.descent;
  60         y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
  61         x = dc.x + (h / 2);
  62
  63         /* shorten text if necessary */
  64         while(len && (w = textnw(buf, len)) > dc.w - h)
  65                 buf[--len] = 0;
  66         if(len < olen) {
  67                 if(len > 1)
  68                         buf[len - 1] = '.';
  69                 if(len > 2)
  70                         buf[len - 2] = '.';
  71                 if(len > 3)
  72                         buf[len - 3] = '.';
  73         }
  74
  75         if(w > dc.w)
  76                 return; /* too long */
  77         gcv.foreground = invert ? dc.bg : dc.fg;
  78         gcv.background = invert ? dc.fg : dc.bg;
  79         if(dc.font.set) {
  80                 XChangeGC(dpy, dc.gc, GCForeground | GCBackground, &gcv);
  81                 XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
  82         }
  83         else {
  84                 gcv.font = dc.font.xfont->fid;
  85                 XChangeGC(dpy, dc.gc, GCForeground | GCBackground | GCFont, &gcv);
  86                 XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
  87         }
  88         if(underline) {
  89                 points[0].x = dc.x + (h / 2) - 1;
  90                 points[0].y = dc.y + dc.h - 3;
  91                 points[1].x = dc.w - h + 2;
  92                 points[1].y = 0;
  93                 XDrawLines(dpy, dc.drawable, dc.gc, points, 2, CoordModePrevious);
  94         }
  95 }
  96
  97 /* extern */
  98
  99 void
 100 drawall()
 101 {
 102         Client *c;
 103
 104         for(c = clients; c; c = getnext(c->next))
 105                 drawtitle(c);
 106         drawstatus();
 107 }
 108
 109 void
 110 drawstatus()
 111 {
 112         int i, x;
 113         Bool istile = arrange == dotile;
 114
 115         dc.x = dc.y = 0;
 116         dc.w = bw;
 117         drawtext(NULL, !istile, False);
 118
 119         dc.w = 0;
 120         for(i = 0; i < ntags; i++) {
 121                 dc.x += dc.w;
 122                 dc.w = textw(tags[i]);
 123                 if(istile)
 124                         drawtext(tags[i], seltag[i], sel && sel->tags[i]);
 125                 else
 126                         drawtext(tags[i], !seltag[i], sel && sel->tags[i]);
 127         }
 128         x = dc.x + dc.w;
 129         dc.w = textw(stext);
 130         dc.x = bx + bw - dc.w;
 131         if(dc.x < x) {
 132                 dc.x = x;
 133                 dc.w = bw - x;
 134         }
 135         drawtext(stext, !istile, False);
 136
 137         if(sel && ((dc.w = dc.x - x) > bh)) {
 138                 dc.x = x;
 139                 drawtext(sel->name, istile, False);
 140         }
 141         XCopyArea(dpy, dc.drawable, barwin, dc.gc, 0, 0, bw, bh, 0, 0);
 142         XSync(dpy, False);
 143 }
 144
 145 void
 146 drawtitle(Client *c)
 147 {
 148         int i;
 149         Bool istile = arrange == dotile;
 150
 151         if(c == sel && issel) {
 152                 drawstatus();
 153                 XUnmapWindow(dpy, c->twin);
 154                 XSetWindowBorder(dpy, c->win, dc.fg);
 155                 return;
 156         }
 157
 158         XSetWindowBorder(dpy, c->win, dc.bg);
 159         XMapWindow(dpy, c->twin);
 160         dc.x = dc.y = 0;
 161         dc.w = c->tw;
 162         drawtext(c->name, !istile, False);
 163         XCopyArea(dpy, dc.drawable, c->twin, dc.gc, 0, 0, c->tw, c->th, 0, 0);
 164         XSync(dpy, False);
 165 }
 166
 167 unsigned long
 168 getcolor(const char *colstr)
 169 {
 170         Colormap cmap = DefaultColormap(dpy, screen);
 171         XColor color;
 172
 173         XAllocNamedColor(dpy, cmap, colstr, &color, &color);
 174         return color.pixel;
 175 }
 176
 177 void
 178 setfont(const char *fontstr)
 179 {
 180         char **missing, *def;
 181         int i, n;
 182
 183         missing = NULL;
 184         setlocale(LC_ALL, "");
 185         if(dc.font.set)
 186                 XFreeFontSet(dpy, dc.font.set);
 187         dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
 188         if(missing) {
 189                 while(n--)
 190                         fprintf(stderr, "missing fontset: %s\n", missing[n]);
 191                 XFreeStringList(missing);
 192                 if(dc.font.set) {
 193                         XFreeFontSet(dpy, dc.font.set);
 194                         dc.font.set = NULL;
 195                 }
 196         }
 197         if(dc.font.set) {
 198                 XFontSetExtents *font_extents;
 199                 XFontStruct **xfonts;
 200                 char **font_names;
 201
 202                 dc.font.ascent = dc.font.descent = 0;
 203                 font_extents = XExtentsOfFontSet(dc.font.set);
 204                 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
 205                 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
 206                         if(dc.font.ascent < (*xfonts)->ascent)
 207                                 dc.font.ascent = (*xfonts)->ascent;
 208                         if(dc.font.descent < (*xfonts)->descent)
 209                                 dc.font.descent = (*xfonts)->descent;
 210                         xfonts++;
 211                 }
 212         }
 213         else {
 214                 if(dc.font.xfont)
 215                         XFreeFont(dpy, dc.font.xfont);
 216                 dc.font.xfont = NULL;
 217                 dc.font.xfont = XLoadQueryFont(dpy, fontstr);
 218                 if (!dc.font.xfont)
 219                         dc.font.xfont = XLoadQueryFont(dpy, "fixed");
 220                 if (!dc.font.xfont)
 221                         eprint("error, cannot init 'fixed' font\n");
 222                 dc.font.ascent = dc.font.xfont->ascent;
 223                 dc.font.descent = dc.font.xfont->descent;
 224         }
 225         dc.font.height = dc.font.ascent + dc.font.descent;
 226 }
 227
 228 unsigned int
 229 textw(const char *text)
 230 {
 231         return textnw(text, strlen(text)) + dc.font.height;
 232 }