heroik.js

   1 /* The person who associated a work with this deed has dedicated the
   2    work to the public domain by waiving all of his or her rights to
   3    the work worldwide under copyright law, including all related and
   4    neighboring rights, to the extent allowed by law.
   5
   6    You can copy, modify, distribute and perform the work, even for
   7    commercial purposes, all without asking permission.
   8
   9    See https://creativecommons.org/publicdomain/zero/1.0/ for details.
  10 */
  11
  12 "use strict";
  13
  14 function offsetTop (el) {
  15     var offset = 0;
  16     for (offset = 0; el && el.offsetTop !== undefined; el = el.offsetParent) {
  17         offset += el.offsetTop;
  18     }
  19     return offset;
  20 }
  21
  22 function scrollToId (id) {
  23     var el = id ? document.getElementById(id) : null;
  24     if (el) {
  25         window.scrollTo(0, offsetTop(el) - 20);
  26         history.replaceState(null, "", "#" + id);
  27     }
  28 }
  29
  30 function open (event) {
  31     var href = this.href;
  32     var target = this.target === "_parent" ? window.parent : window;
  33
  34     if (this.getAttribute('href')[0] === "#")
  35         scrollToId(this.getAttribute('href').slice(1));
  36     else
  37         target.location.href = this.href;
  38     event.preventDefault();
  39 }
  40
  41 window.addEventListener('load', function () {
  42     if (typeof FastClick !== "undefined")
  43         FastClick.attach(document.body, { tapDelay: 50 });
  44     scrollToId(location.hash.slice(1));
  45 });
  46
  47 window.addEventListener('DOMContentLoaded', function () {
  48     if (navigator.standalone)
  49         document.body.className += ' standalone';
  50
  51     var links = document.querySelectorAll(
  52         "a[href]:not([target=_blank])");
  53     for (var i = 0; i < links.length; ++i)
  54         links[i].addEventListener('click', open);
  55 });
  56
  57 function choice (seq) {
  58     return seq[(Math.random() * seq.length) | 0];
  59 }
  60
  61 function contains (element) {
  62     return this.indexOf(element) >= 0;
  63 }
  64
  65 function issubset (sub, sup) {
  66     return sub.every(contains, sup);
  67 }
  68
  69 function intersects (a, b) {
  70     return Array.prototype.some.call(a, contains, b);
  71 }
  72
  73 function ventureForth () {
  74     var difficulty = document.querySelector("[data-events]:checked");
  75     var denizens = document.querySelectorAll("[data-flags]:checked");
  76     var hash = "#" + [difficulty.getAttribute("data-events"),
  77                       difficulty.getAttribute("data-nop")]
  78         .concat(Array.prototype.map.call(denizens, function (element) {
  79             return element.getAttribute("data-flags");
  80         })).join(",");
  81     location.href = "scenario.html" + hash;
  82 }
  83
  84 if (applicationCache && applicationCache.status) {
  85     applicationCache.update();
  86     applicationCache.addEventListener('updateready', function () {
  87         if (applicationCache.status === applicationCache.UPDATEREADY) {
  88             applicationCache.swapCache();
  89         }
  90     });
  91 }