/*
This file is part of Ext JS 3.4

Copyright (c) 2011-2013 Sencha Inc

Contact:  http://www.sencha.com/contact

GNU General Public License Usage
This file may be used under the terms of the GNU General Public License version 3.0 as
published by the Free Software Foundation and appearing in the file LICENSE included in the
packaging of this file.

Please review the following information to ensure the GNU General Public License version 3.0
requirements will be met: http://www.gnu.org/copyleft/gpl.html.

If you are unsure which license is appropriate for your use, please contact the sales department
at http://www.sencha.com/contact.

Build date: 2013-04-03 15:07:25
*/
/**
 * @class Ext.Element
 */
Ext.Element.addMethods(
    function() {
        var VISIBILITY      = "visibility",
            DISPLAY         = "display",
            HIDDEN          = "hidden",
            NONE            = "none",
            XMASKED         = "x-masked",
            XMASKEDRELATIVE = "x-masked-relative",
            data            = Ext.Element.data;

        return {
            /**
             * Checks whether the element is currently visible using both visibility and display properties.
             * @param {Boolean} deep (optional) True to walk the dom and see if parent elements are hidden (defaults to false)
             * @return {Boolean} True if the element is currently visible, else false
             */
            isVisible : function(deep) {
                var vis = !this.isStyle(VISIBILITY, HIDDEN) && !this.isStyle(DISPLAY, NONE),
                    p   = this.dom.parentNode;
                
                if (deep !== true || !vis) {
                    return vis;
                }
                
                while (p && !(/^body/i.test(p.tagName))) {
                    if (!Ext.fly(p, '_isVisible').isVisible()) {
                        return false;
                    }
                    p = p.parentNode;
                }
                return true;
            },

            /**
             * Returns true if display is not "none"
             * @return {Boolean}
             */
            isDisplayed : function() {
                return !this.isStyle(DISPLAY, NONE);
            },

            /**
             * Convenience method for setVisibilityMode(Element.DISPLAY)
             * @param {String} display (optional) What to set display to when visible
             * @return {Ext.Element} this
             */
            enableDisplayMode : function(display) {
                this.setVisibilityMode(Ext.Element.DISPLAY);
                
                if (!Ext.isEmpty(display)) {
                    data(this.dom, 'originalDisplay', display);
                }
                
                return this;
            },

            /**
             * Puts a mask over this element to disable user interaction. Requires core.css.
             * This method can only be applied to elements which accept child nodes.
             * @param {String} msg (optional) A message to display in the mask
             * @param {String} msgCls (optional) A css class to apply to the msg element
             * @return {Element} The mask element
             */
            mask : function(msg, msgCls) {
                var me  = this,
                    dom = me.dom,
                    dh  = Ext.DomHelper,
                    EXTELMASKMSG = "ext-el-mask-msg",
                    el,
                    mask;

                if (!/^body/i.test(dom.tagName) && me.getStyle('position') == 'static') {
                    me.addClass(XMASKEDRELATIVE);
                }
                if (el = data(dom, 'maskMsg')) {
                    el.remove();
                }
                if (el = data(dom, 'mask')) {
                    el.remove();
                }

                mask = dh.append(dom, {cls : "ext-el-mask"}, true);
                data(dom, 'mask', mask);

                me.addClass(XMASKED);
                mask.setDisplayed(true);
                
                if (typeof msg == 'string') {
                    var mm = dh.append(dom, {cls : EXTELMASKMSG, cn:{tag:'div'}}, true);
                    data(dom, 'maskMsg', mm);
                    mm.dom.className = msgCls ? EXTELMASKMSG + " " + msgCls : EXTELMASKMSG;
                    mm.dom.firstChild.innerHTML = msg;
                    mm.setDisplayed(true);
                    mm.center(me);
                }
                
                // ie will not expand full height automatically
                if (Ext.isIE && !(Ext.isIE7 && Ext.isStrict) && me.getStyle('height') == 'auto') {
                    mask.setSize(undefined, me.getHeight());
                }
                
                return mask;
            },

            /**
             * Removes a previously applied mask.
             */
            unmask : function() {
                var me      = this,
                    dom     = me.dom,
                    mask    = data(dom, 'mask'),
                    maskMsg = data(dom, 'maskMsg');

                if (mask) {
                    if (maskMsg) {
                        maskMsg.remove();
                        data(dom, 'maskMsg', undefined);
                    }
                    
                    mask.remove();
                    data(dom, 'mask', undefined);
                    me.removeClass([XMASKED, XMASKEDRELATIVE]);
                }
            },

            /**
             * Returns true if this element is masked
             * @return {Boolean}
             */
            isMasked : function() {
                var m = data(this.dom, 'mask');
                return m && m.isVisible();
            },

            /**
             * Creates an iframe shim for this element to keep selects and other windowed objects from
             * showing through.
             * @return {Ext.Element} The new shim element
             */
            createShim : function() {
                var el = document.createElement('iframe'),
                    shim;
                
                el.frameBorder = '0';
                el.className = 'ext-shim';
                el.src = Ext.SSL_SECURE_URL;
                shim = Ext.get(this.dom.parentNode.insertBefore(el, this.dom));
                shim.autoBoxAdjust = false;
                return shim;
            }
        };
    }()
);