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
   6 #include <stdio.h>
   7 #include <string.h>
   8
   9 #include <X11/Xlocale.h>
  10
  11 #include "dwm.h"
  12
  13 static void
  14 drawborder(void)
  15 {
  16         XPoint points[5];
  17         XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
  18         XSetForeground(dpy, dc.gc, dc.border);
  19         points[0].x = dc.x;
  20         points[0].y = dc.y;
  21         points[1].x = dc.w - 1;
  22         points[1].y = 0;
  23         points[2].x = 0;
  24         points[2].y = dc.h - 1;
  25         points[3].x = -(dc.w - 1);
  26         points[3].y = 0;
  27         points[4].x = 0;
  28         points[4].y = -(dc.h - 1);
  29         XDrawLines(dpy, dc.drawable, dc.gc, points, 5, CoordModePrevious);
  30 }
  31
  32 void
  33 draw(Bool border, const char *text)
  34 {
  35         int x, y, w, h;
  36         unsigned int len;
  37         static char buf[256];
  38         XGCValues gcv;
  39         XRectangle r = { dc.x, dc.y, dc.w, dc.h };
  40
  41         XSetForeground(dpy, dc.gc, dc.bg);
  42         XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
  43
  44         w = 0;
  45         if(border)
  46                 drawborder();
  47
  48         if(!text)
  49                 return;
  50
  51         len = strlen(text);
  52         if(len >= sizeof(buf))
  53                 len = sizeof(buf) - 1;
  54         memcpy(buf, text, len);
  55         buf[len] = 0;
  56
  57         h = dc.font.ascent + dc.font.descent;
  58         y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
  59         x = dc.x + (h / 2);
  60
  61         /* shorten text if necessary */
  62         while(len && (w = textnw(buf, len)) > dc.w - h)
  63                 buf[--len] = 0;
  64
  65         if(w > dc.w)
  66                 return; /* too long */
  67
  68         gcv.foreground = dc.fg;
  69         gcv.background = dc.bg;
  70         if(dc.font.set) {
  71                 XChangeGC(dpy, dc.gc, GCForeground | GCBackground, &gcv);
  72                 XmbDrawImageString(dpy, dc.drawable, dc.font.set, dc.gc,
  73                                 x, y, buf, len);
  74         }
  75         else {
  76                 gcv.font = dc.font.xfont->fid;
  77                 XChangeGC(dpy, dc.gc, GCForeground | GCBackground | GCFont, &gcv);
  78                 XDrawImageString(dpy, dc.drawable, dc.gc, x, y, buf, len);
  79         }
  80 }
  81
  82 unsigned long
  83 initcolor(const char *colstr)
  84 {
  85         XColor color;
  86         Colormap cmap = DefaultColormap(dpy, screen);
  87
  88         XAllocNamedColor(dpy, cmap, colstr, &color, &color);
  89         return color.pixel;
  90 }
  91
  92 unsigned int
  93 textnw(char *text, unsigned int len)
  94 {
  95         XRectangle r;
  96         if(dc.font.set) {
  97                 XmbTextExtents(dc.font.set, text, len, NULL, &r);
  98                 return r.width;
  99         }
 100         return XTextWidth(dc.font.xfont, text, len);
 101 }
 102
 103 unsigned int
 104 textw(char *text)
 105 {
 106         return textnw(text, strlen(text));
 107 }
 108
 109 void
 110 initfont(const char *fontstr)
 111 {
 112         char **missing, *def;
 113         int i, n;
 114
 115         missing = NULL;
 116         setlocale(LC_ALL, "");
 117         if(dc.font.set)
 118                 XFreeFontSet(dpy, dc.font.set);
 119         dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
 120         if(missing) {
 121                 while(n--)
 122                         fprintf(stderr, "missing fontset: %s\n", missing[n]);
 123                 XFreeStringList(missing);
 124                 if(dc.font.set) {
 125                         XFreeFontSet(dpy, dc.font.set);
 126                         dc.font.set = NULL;
 127                 }
 128         }
 129         if(dc.font.set) {
 130                 XFontSetExtents *font_extents;
 131                 XFontStruct **xfonts;
 132                 char **font_names;
 133
 134                 dc.font.ascent = dc.font.descent = 0;
 135                 font_extents = XExtentsOfFontSet(dc.font.set);
 136                 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
 137                 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
 138                         if(dc.font.ascent < (*xfonts)->ascent)
 139                                 dc.font.ascent = (*xfonts)->ascent;
 140                         if(dc.font.descent < (*xfonts)->descent)
 141                                 dc.font.descent = (*xfonts)->descent;
 142                         xfonts++;
 143                 }
 144         }
 145         else {
 146                 if(dc.font.xfont)
 147                         XFreeFont(dpy, dc.font.xfont);
 148                 dc.font.xfont = NULL;
 149                 dc.font.xfont = XLoadQueryFont(dpy, fontstr);
 150                 if (!dc.font.xfont)
 151                         dc.font.xfont = XLoadQueryFont(dpy, "fixed");
 152                 if (!dc.font.xfont)
 153                         error("error, cannot init 'fixed' font\n");
 154                 dc.font.ascent = dc.font.xfont->ascent;
 155                 dc.font.descent = dc.font.xfont->descent;
 156         }
 157         dc.font.height = dc.font.ascent + dc.font.descent;
 158 }