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 "dmenu.h"
   6 #include <stdio.h>
   7 #include <string.h>
   8 #include <X11/Xlocale.h>
   9
  10 /* static */
  11
  12 static void
  13 drawborder(void)
  14 {
  15         XPoint points[5];
  16
  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 static unsigned int
  33 textnw(const char *text, unsigned int len)
  34 {
  35         XRectangle r;
  36
  37         if(dc.font.set) {
  38                 XmbTextExtents(dc.font.set, text, len, NULL, &r);
  39                 return r.width;
  40         }
  41         return XTextWidth(dc.font.xfont, text, len);
  42 }
  43
  44 /* extern */
  45
  46 void
  47 drawtext(const char *text, Bool invert, Bool border)
  48 {
  49         int x, y, w, h;
  50         static char buf[256];
  51         unsigned int len;
  52         XGCValues gcv;
  53         XRectangle r = { dc.x, dc.y, dc.w, dc.h };
  54
  55         XSetForeground(dpy, dc.gc, invert ? dc.fg : dc.bg);
  56         XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
  57
  58         w = 0;
  59         if(border)
  60                 drawborder();
  61
  62         if(!text)
  63                 return;
  64
  65         len = strlen(text);
  66         if(len >= sizeof(buf))
  67                 len = sizeof(buf) - 1;
  68         memcpy(buf, text, len);
  69         buf[len] = 0;
  70
  71         h = dc.font.ascent + dc.font.descent;
  72         y = dc.y + (dc.h / 2) - (h / 2) + dc.font.ascent;
  73         x = dc.x + (h / 2);
  74
  75         /* shorten text if necessary */
  76         while(len && (w = textnw(buf, len)) > dc.w - h)
  77                 buf[--len] = 0;
  78
  79         if(w > dc.w)
  80                 return; /* too long */
  81
  82         gcv.foreground = invert ? dc.bg : dc.fg;
  83         gcv.background = invert ? dc.fg : dc.bg;
  84         if(dc.font.set) {
  85                 XChangeGC(dpy, dc.gc, GCForeground | GCBackground, &gcv);
  86                 XmbDrawImageString(dpy, dc.drawable, dc.font.set, dc.gc,
  87                                 x, y, buf, len);
  88         }
  89         else {
  90                 gcv.font = dc.font.xfont->fid;
  91                 XChangeGC(dpy, dc.gc, GCForeground | GCBackground | GCFont, &gcv);
  92                 XDrawImageString(dpy, dc.drawable, dc.gc, x, y, buf, len);
  93         }
  94 }
  95
  96 unsigned long
  97 getcolor(const char *colstr)
  98 {
  99         Colormap cmap = DefaultColormap(dpy, screen);
 100         XColor color;
 101
 102         XAllocNamedColor(dpy, cmap, colstr, &color, &color);
 103         return color.pixel;
 104 }
 105
 106 void
 107 setfont(const char *fontstr)
 108 {
 109         char **missing, *def;
 110         int i, n;
 111
 112         missing = NULL;
 113         setlocale(LC_ALL, "");
 114         if(dc.font.set)
 115                 XFreeFontSet(dpy, dc.font.set);
 116         dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
 117         if(missing) {
 118                 XFreeStringList(missing);
 119                 if(dc.font.set) {
 120                         XFreeFontSet(dpy, dc.font.set);
 121                         dc.font.set = NULL;
 122                 }
 123         }
 124         if(dc.font.set) {
 125                 XFontSetExtents *font_extents;
 126                 XFontStruct **xfonts;
 127                 char **font_names;
 128
 129                 dc.font.ascent = dc.font.descent = 0;
 130                 font_extents = XExtentsOfFontSet(dc.font.set);
 131                 n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
 132                 for(i = 0, dc.font.ascent = 0, dc.font.descent = 0; i < n; i++) {
 133                         if(dc.font.ascent < (*xfonts)->ascent)
 134                                 dc.font.ascent = (*xfonts)->ascent;
 135                         if(dc.font.descent < (*xfonts)->descent)
 136                                 dc.font.descent = (*xfonts)->descent;
 137                         xfonts++;
 138                 }
 139         }
 140         else {
 141                 if(dc.font.xfont)
 142                         XFreeFont(dpy, dc.font.xfont);
 143                 dc.font.xfont = NULL;
 144                 dc.font.xfont = XLoadQueryFont(dpy, fontstr);
 145                 if (!dc.font.xfont)
 146                         dc.font.xfont = XLoadQueryFont(dpy, "fixed");
 147                 if (!dc.font.xfont)
 148                         eprint("error, cannot init 'fixed' font\n");
 149                 dc.font.ascent = dc.font.xfont->ascent;
 150                 dc.font.descent = dc.font.xfont->descent;
 151         }
 152         dc.font.height = dc.font.ascent + dc.font.descent;
 153 }
 154
 155 unsigned int
 156 textw(const char *text)
 157 {
 158         return textnw(text, strlen(text)) + dc.font.height;
 159 }