text: ﻿/*
   * 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:
   * https://github.com/tzuryby/hotkeys
   *
   * Original idea by:
   * Binny V A, https://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", 188: ",", 190: ".",
              191: "/", 224: "meta"
          },
  
          shiftNums: {
              "`": "~", "1": "!", "2": "@", "3": "#", "4": "$", "5": "%", "6": "^", "7": "&",
              "8": "*", "9": "(", "0": ")", "-": "_", "=": "+", ";": ": ", "'": "\"", ",": "<",
              ".": ">", "/": "?", "\\": "|"
          }
      };
  
      function keyHandler(handleObj) {
  
          var origHandler = handleObj.handler,
  //use namespace as keys so it works with event delegation as well
  //will also allow removing listeners of a specific key combination
  //and support data objects
              keys = (handleObj.namespace || "").toLowerCase().split(" ");
          keys = jQuery.map(keys, function(key) {
              return key.split(".");
          });
  
  //no need to modify handler if no keys specified
          if(keys.length === 1 && (keys[0] === "" || keys[0] === "autocomplete")) {
              return;
          }
  
          handleObj.handler = function(event) {
  // Don't fire in text-accepting inputs that we didn't directly bind to
  // important to note that $.fn.prop is only available on jquery 1.6+
              if(this !== event.target && (/textarea|select/i.test(event.target.nodeName) ||
                  event.target.type === "text" || $(event.target).prop('contenteditable') == 'true' )) {
                  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);