/*

YUI 3.10.3 (build 2fb5187)

Copyright 2013 Yahoo! Inc. All rights reserved.

Licensed under the BSD License.

http://yuilibrary.com/license/

*/

YUI.add('event-contextmenu', function (Y, NAME) {

/**

 * Provides extended keyboard support for the "contextmenu" event such that:

 * <ul>

 * <li>The browser's default context menu is suppressed regardless of how the event is triggered.</li>

 * <li>On Windows the "contextmenu" event is fired consistently regardless of whether the user

 * pressed the Menu key or Shift + F10.</li>

 * <li>When the "contextmenu" event is fired via the keyboard, the pageX, pageY, clientX and clientY

 * properties reference the center of the event target. This makes it easy for "contextmenu" event listeners

 * to position an overlay in response to the event by not having to worry about special handling of the x

 * and y coordinates based on the device that fired the event.</li>

 * <li>For Webkit and Gecko on the Mac it enables the use of the Shift + Control + Option + M keyboard

 * shortcut to fire the "contextmenu" event, which (by default) is only available when VoiceOver

 * (the screen reader on the Mac) is enabled.</li>

 * <li>For Opera on the Mac it ensures the "contextmenu" event is fired when the user presses

 * Shift + Command + M (Opera's context menu keyboard shortcut).</li>

 * </ul>

 * @module event-contextmenu

 * @requires event

 */

var Event = Y.Event,

    DOM = Y.DOM,

    UA = Y.UA,

    OS = Y.UA.os,

    ie = UA.ie,

    gecko = UA.gecko,

    webkit = UA.webkit,

    opera = UA.opera,

    isWin = (OS === "windows"),

    isMac = (OS === "macintosh"),

    eventData = {},

    conf = {

        on: function (node, subscription, notifier, filter) {

            var handles = [];

            handles.push(Event._attach(["contextmenu", function (e) {

                // Any developer listening for the "contextmenu" event is likely

                // going to call preventDefault() to prevent the display of

                // the browser's context menu. So, you know, save them a step.

                e.preventDefault();

                var id = Y.stamp(node),

                    data = eventData[id];

                if (data) {

                    e.clientX = data.clientX;

                    e.clientY = data.clientY;

                    e.pageX = data.pageX;

                    e.pageY = data.pageY;

                    delete eventData[id];

                }

                notifier.fire(e);

            }, node]));

            handles.push(node[filter ? "delegate" : "on"]("keydown", function (e) {

                var target = this.getDOMNode(),

                    shiftKey = e.shiftKey,

                    keyCode = e.keyCode,

                    shiftF10 = (shiftKey && keyCode == 121),

                    menuKey = (isWin && keyCode == 93),

                    ctrlKey = e.ctrlKey,

                    mKey = (keyCode === 77),

                    macWebkitAndGeckoShortcut = (isMac && (webkit || gecko) && ctrlKey && shiftKey && e.altKey && mKey),

                    // Note: The context menu keyboard shortcut for Opera on the Mac is Shift + Cmd (metaKey) + M,

                    // but e.metaKey is false for Opera, and Opera sets e.ctrlKey to true instead.

                    macOperaShortcut = (isMac && opera && ctrlKey && shiftKey && mKey),

                    clientX = 0,

                    clientY = 0,

                    scrollX,

                    scrollY,

                    pageX,

                    pageY,

                    xy,

                    x,

                    y;

                if ((isWin && (shiftF10 || menuKey)) ||

                        (macWebkitAndGeckoShortcut || macOperaShortcut)) {

                    // Need to call preventDefault() here b/c:

                    // 1) To prevent IE's menubar from gaining focus when the

                    // user presses Shift + F10

                    // 2) In Firefox and Opera for Win, Shift + F10 will display a

                    // context menu, but won't fire the "contextmenu" event. So, need

                    // to call preventDefault() to prevent the display of the

                    // browser's context menu

                    // 3) For Opera on the Mac the context menu keyboard shortcut

                    // (Shift + Cmd + M) will display a context menu, but like Firefox

                    // and Opera on windows, Opera doesn't fire a "contextmenu" event,

                    // so preventDefault() is just used to supress Opera's

                    // default context menu.

                    if (((ie || (isWin && (gecko || opera))) && shiftF10) || macOperaShortcut) {

                        e.preventDefault();

                    }

                    xy = DOM.getXY(target);

                    x = xy[0];

                    y = xy[1];

                    scrollX = DOM.docScrollX();

                    scrollY = DOM.docScrollY();

                    // Protect against instances where xy and might not be returned,

                    // for example if the target is the document.

                    if (!Y.Lang.isUndefined(x)) {

                        clientX = (x + (target.offsetWidth/2)) - scrollX;

                        clientY = (y + (target.offsetHeight/2)) - scrollY;

                    }

                    pageX = clientX + scrollX;

                    pageY = clientY + scrollY;

                    // When the "contextmenu" event is fired from the keyboard

                    // clientX, clientY, pageX or pageY aren't set to useful

                    // values. So, we follow Safari's model here of setting

                    // the x & x coords to the center of the event target.

                    if (menuKey || (isWin && webkit && shiftF10)) {

                        eventData[Y.stamp(node)] = {

                            clientX: clientX,

                            clientY: clientY,

                            pageX: pageX,

                            pageY: pageY

                        };

                    }

                    // Don't need to call notifier.fire(e) when the Menu key

                    // is pressed as it fires the "contextmenu" event by default.

                    //

                    // In IE the call to preventDefault() for Shift + F10

                    // prevents the "contextmenu" event from firing, so we need

                    // to call notifier.fire(e)

                    //

                    // Need to also call notifier.fire(e) for Gecko and Opera since

                    // neither Shift + F10 or Shift + Cmd + M fire the "contextmenu" event.

                    //

                    // Lastly, also need to call notifier.fire(e) for all Mac browsers

                    // since neither Shift + Ctrl + Option + M (Webkit and Gecko) or

                    // Shift + Command + M (Opera) fire the "contextmenu" event.

                    if (((ie || (isWin && (gecko || opera))) && shiftF10) || isMac) {

                        e.clientX = clientX;

                        e.clientY = clientY;

                        e.pageX = pageX;

                        e.pageY = pageY;

                        notifier.fire(e);

                    }

                }

            }, filter));

            subscription._handles = handles;

        },

        detach: function (node, subscription, notifier) {

            Y.each(subscription._handles, function (handle) {

                handle.detach();

            });

        }

    };

conf.delegate = conf.on;

conf.detachDelegate = conf.detach;

Event.define("contextmenu", conf, true);

}, '3.10.3', {"requires": ["event-synthetic", "dom-screen"]});