worldshardestgame/js/jquery.hotkeys.js

/*
 * jQuery Hotkeys Plugin
 * Copyright 2010, John Resig
 * Dual licensed under the MIT or GPL Version 2 licenses.
 *
 * Based upon the plugin by Tzury Bar Yochay:
 * http://github.com/tzuryby/hotkeys
 *
 * Original idea by:
 * Binny V A, http://www.openjs.com/scripts/events/keyboard_shortcuts/
 */

(function (jQuery) {
    jQuery.hotkeys = {
      version: "0.8",
  
      specialKeys: {
        8: "backspace",
        9: "tab",
        13: "return",
        16: "shift",
        17: "ctrl",
        18: "alt",
        19: "pause",
        20: "capslock",
        27: "esc",
        32: "space",
        33: "pageup",
        34: "pagedown",
        35: "end",
        36: "home",
        37: "left",
        38: "up",
        39: "right",
        40: "down",
        45: "insert",
        46: "del",
        96: "0",
        97: "1",
        98: "2",
        99: "3",
        100: "4",
        101: "5",
        102: "6",
        103: "7",
        104: "8",
        105: "9",
        106: "*",
        107: "+",
        109: "-",
        110: ".",
        111: "/",
        112: "f1",
        113: "f2",
        114: "f3",
        115: "f4",
        116: "f5",
        117: "f6",
        118: "f7",
        119: "f8",
        120: "f9",
        121: "f10",
        122: "f11",
        123: "f12",
        144: "numlock",
        145: "scroll",
        191: "/",
        224: "meta",
      },
  
      shiftNums: {
        "`": "~",
        "1": "!",
        "2": "@",
        "3": "#",
        "4": "$",
        "5": "%",
        "6": "^",
        "7": "&",
        "8": "*",
        "9": "(",
        "0": ")",
        "-": "_",
        "=": "+",
        ";": ": ",
        "'": '"',
        ",": "<",
        ".": ">",
        "/": "?",
        "\\": "|",
      },
    };
  
    function keyHandler(handleObj) {
      // Only care when a possible input has been specified
      if (typeof handleObj.data !== "string") {
        return;
      }
  
      var origHandler = handleObj.handler,
        keys = handleObj.data.toLowerCase().split(" ");
  
      handleObj.handler = function (event) {
        // Don't fire in text-accepting inputs that we didn't directly bind to
        if (this !== event.target && (/textarea|select/i.test(event.target.nodeName) || event.target.type === "text")) {
          return;
        }
  
        // Keypress represents characters, not special keys
        var special = event.type !== "keypress" && jQuery.hotkeys.specialKeys[event.which],
          character = String.fromCharCode(event.which).toLowerCase(),
          key,
          modif = "",
          possible = {};
  
        // check combinations (alt|ctrl|shift+anything)
        if (event.altKey && special !== "alt") {
          modif += "alt+";
        }
  
        if (event.ctrlKey && special !== "ctrl") {
          modif += "ctrl+";
        }
  
        if (event.metaKey && !event.ctrlKey && special !== "meta") {
          modif += "meta+";
        }
  
        if (event.shiftKey && special !== "shift") {
          modif += "shift+";
        }
  
        if (special) {
          possible[modif + special] = true;
        } else {
          possible[modif + character] = true;
          possible[modif + jQuery.hotkeys.shiftNums[character]] = true;
  
          // "$" can be triggered as "Shift+4" or "Shift+$" or just "$"
          if (modif === "shift+") {
            possible[jQuery.hotkeys.shiftNums[character]] = true;
          }
        }
  
        for (var i = 0, l = keys.length; i < l; i++) {
          if (possible[keys[i]]) {
            return origHandler.apply(this, arguments);
          }
        }
      };
    }
  
    jQuery.each(["keydown", "keyup", "keypress"], function () {
      jQuery.event.special[this] = { add: keyHandler };
    });
  })(jQuery);