jQuery Hotkeys Plugin

Originally from github jeresig/jquery.hotkeys

Tính đến 04-04-2015. Xem phiên bản mới nhất.

Script này sẽ không được không được cài đặt trực tiếp. Nó là một thư viện cho các script khác để bao gồm các chỉ thị meta // @require https://update.greasyfork.org/scripts/8984/44373/jQuery%20Hotkeys%20Plugin.js

// ==UserScript==
// @name          jQuery Hotkeys Plugin
// @namespace     JQHP
// @author        drhouse
// @version       1.0
// ==/UserScript==

/*
 * 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/
*/

/*
 * One small change is: now keys are passed by object { keys: '...' }
 * Might be useful, when you want to pass some other data to your handler
 */

(function(jQuery){
	
	jQuery.hotkeys = {
		version: "0.8",

		specialKeys: {
			8: "backspace", 9: "tab", 10: "return", 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", 186: ";", 191: "/",
			220: "\\", 222: "'", 224: "meta"
		},
	
		shiftNums: {
			"`": "~", "1": "!", "2": "@", "3": "#", "4": "$", "5": "%", "6": "^", "7": "&", 
			"8": "*", "9": "(", "0": ")", "-": "_", "=": "+", ";": ": ", "'": "\"", ",": "<", 
			".": ">",  "/": "?",  "\\": "|"
		}
	};

	function keyHandler( handleObj ) {
		if ( typeof handleObj.data === "string" ) {
			handleObj.data = { keys: handleObj.data };
		}

		// Only care when a possible input has been specified
		if ( !handleObj.data.keys || typeof handleObj.data.keys !== "string" ) {
			return;
		}

		var origHandler = handleObj.handler,
			keys = handleObj.data.keys.toLowerCase().split(" "),
			textAcceptingInputTypes = ["text", "password", "number", "email", "url", "range", "date", "month", "week", "time", "datetime", "datetime-local", "search", "color"];
	
		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 ) ||
				jQuery.inArray(event.target.type, textAcceptingInputTypes) > -1 ) ) {
				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+";
			}
			
			// TODO: Need to make sure this works consistently across platforms
			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 );