/*

 * jQuery blockUI plugin

 * Version 1.33  (09/14/2007)

 * @requires jQuery v1.1.1

 *

 * $Id$

 *

 * Examples at: http://malsup.com/jquery/block/

 * Copyright (c) 2007 M. Alsup

 * Dual licensed under the MIT and GPL licenses:

 * http://www.opensource.org/licenses/mit-license.php

 * http://www.gnu.org/licenses/gpl.html

 */

 (function($) {

/**

 * blockUI provides a mechanism for blocking user interaction with a page (or parts of a page).

 * This can be an effective way to simulate synchronous behavior during ajax operations without

 * locking the browser.  It will prevent user operations for the current page while it is

 * active ane will return the page to normal when it is deactivate.  blockUI accepts the following

 * two optional arguments:

 *

 *   message (String|Element|jQuery): The message to be displayed while the UI is blocked. The message

 *              argument can be a plain text string like "Processing...", an HTML string like

 *              "<h1><img src="busy.gif" /> Please wait...</h1>", a DOM element, or a jQuery object.

 *              The default message is "<h1>Please wait...</h1>"

 *

 *   css (Object):  Object which contains css property/values to override the default styles of

 *              the message.  Use this argument if you wish to override the default

 *              styles.  The css Object should be in a format suitable for the jQuery.css

 *              function.  For example:

 *              $.blockUI({

 *                    backgroundColor: '#ff8',

 *                    border: '5px solid #f00,

 *                    fontWeight: 'bold'

 *              });

 *

 * The default blocking message used when blocking the entire page is "<h1>Please wait...</h1>"

 * but this can be overridden by assigning a value to $.blockUI.defaults.pageMessage in your

 * own code.  For example:

 *

 *      $.blockUI.defaults.pageMessage = "<h1>Bitte Wartezeit</h1>";

 *

 * The default message styling can also be overridden.  For example:

 *

 *      $.extend($.blockUI.defaults.pageMessageCSS, { color: '#00a', backgroundColor: '#0f0' });

 *

 * The default styles work well for simple messages like "Please wait", but for longer messages

 * style overrides may be necessary.

 *

 * @example  $.blockUI();

 * @desc prevent user interaction with the page (and show the default message of 'Please wait...')

 *

 * @example  $.blockUI( { backgroundColor: '#f00', color: '#fff'} );

 * @desc prevent user interaction and override the default styles of the message to use a white on red color scheme

 *

 * @example  $.blockUI('Processing...');

 * @desc prevent user interaction and display the message "Processing..." instead of the default message

 *

 * @name blockUI

 * @param String|jQuery|Element message Message to display while the UI is blocked

 * @param Object css Style object to control look of the message

 * @cat Plugins/blockUI

 */

$.blockUI = function(msg, css, opts) {

    $.blockUI.impl.install(window, msg, css, opts);

};



// expose version number so other plugins can interogate

$.blockUI.version = 1.33;



/**

 * unblockUI removes the UI block that was put in place by blockUI

 *

 * @example  $.unblockUI();

 * @desc unblocks the page

 *

 * @name unblockUI

 * @cat Plugins/blockUI

 */

$.unblockUI = function(opts) {

    $.blockUI.impl.remove(window, opts);

};



/**

 * Blocks user interaction with the selected elements.  (Hat tip: Much of

 * this logic comes from Brandon Aaron's bgiframe plugin.  Thanks, Brandon!)

 * By default, no message is displayed when blocking elements.

 *

 * @example  $('div.special').block();

 * @desc prevent user interaction with all div elements with the 'special' class.

 *

 * @example  $('div.special').block('Please wait');

 * @desc prevent user interaction with all div elements with the 'special' class

 * and show a message over the blocked content.

 *

 * @name block

 * @type jQuery

 * @param String|jQuery|Element message Message to display while the element is blocked

 * @param Object css Style object to control look of the message

 * @cat Plugins/blockUI

 */

$.fn.block = function(msg, css, opts) {

    return this.each(function() {

		if (!this.$pos_checked) {

            if ($.css(this,"position") == 'static')

                this.style.position = 'relative';

            if ($.browser.msie) this.style.zoom = 1; // force 'hasLayout' in IE

            this.$pos_checked = 1;

        }

        $.blockUI.impl.install(this, msg, css, opts);

    });

};



/**

 * Unblocks content that was blocked by "block()"

 *

 * @example  $('div.special').unblock();

 * @desc unblocks all div elements with the 'special' class.

 *

 * @name unblock

 * @type jQuery

 * @cat Plugins/blockUI

 */

$.fn.unblock = function(opts) {

    return this.each(function() {

        $.blockUI.impl.remove(this, opts);

    });

};



/**

 * displays the first matched element in a "display box" above a page overlay.

 *

 * @example  $('#myImage').displayBox();

 * @desc displays "myImage" element in a box

 *

 * @name displayBox

 * @type jQuery

 * @cat Plugins/blockUI

 */

$.fn.displayBox = function(css, fn, isFlash) {

    var msg = this[0];

    if (!msg) return;

    var $msg = $(msg);

    css = css || {};



    var w = $msg.width()  || $msg.attr('width')  || css.width  || $.blockUI.defaults.displayBoxCSS.width;

    var h = $msg.height() || $msg.attr('height') || css.height || $.blockUI.defaults.displayBoxCSS.height ;

    if (w[w.length-1] == '%') {

        var ww = document.documentElement.clientWidth || document.body.clientWidth;

        w = parseInt(w) || 100;

        w = (w * ww) / 100;

    }

    if (h[h.length-1] == '%') {

        var hh = document.documentElement.clientHeight || document.body.clientHeight;

        h = parseInt(h) || 100;

        h = (h * hh) / 100;

    }



    var ml = '-' + parseInt(w)/2 + 'px';

    var mt = '-' + parseInt(h)/2 + 'px';



    // supress opacity on overlay if displaying flash content on mac/ff platform

    var ua = navigator.userAgent.toLowerCase();

    var opts = {

        displayMode: fn || 1,

        noalpha: isFlash && /mac/.test(ua) && /firefox/.test(ua)

    };



    $.blockUI.impl.install(window, msg, { width: w, height: h, marginTop: mt, marginLeft: ml }, opts);

};





// override these in your code to change the default messages and styles

$.blockUI.defaults = {

    // the message displayed when blocking the entire page

    pageMessage:    '<h1>Please wait...</h1>',

    // the message displayed when blocking an element

    elementMessage: '', // none

    // styles for the overlay iframe

    overlayCSS:  { backgroundColor: '#fff', opacity: '0.5' },

    // styles for the message when blocking the entire page

    pageMessageCSS:    { width:'250px', margin:'-50px 0 0 -125px', top:'50%', left:'50%', textAlign:'center', color:'#000', backgroundColor:'#fff', border:'3px solid #aaa' },

    // styles for the message when blocking an element

    elementMessageCSS: { width:'250px', padding:'10px', textAlign:'center', backgroundColor:'#fff'},

    // styles for the displayBox

    displayBoxCSS: { width: '400px', height: '400px', top:'50%', left:'50%' },

    // allow body element to be stetched in ie6

    ie6Stretch: 1,

    // supress tab nav from leaving blocking content?

    allowTabToLeave: 0,

    // Title attribute for overlay when using displayBox

    closeMessage: 'Click to close',

    // use fadeOut effect when unblocking (can be overridden on unblock call)

    fadeOut:  1,

    // fadeOut transition time in millis

    fadeTime: 400

};



// the gory details

$.blockUI.impl = {

    box: null,

    boxCallback: null,

    pageBlock: null,

    pageBlockEls: [],

    op8: window.opera && window.opera.version() < 9,

    ie6: $.browser.msie && /MSIE 6.0/.test(navigator.userAgent),

    install: function(el, msg, css, opts) {

        opts = opts || {};

        this.boxCallback = typeof opts.displayMode == 'function' ? opts.displayMode : null;

        this.box = opts.displayMode ? msg : null;

        var full = (el == window);



        // use logical settings for opacity support based on browser but allow overrides via opts arg

        var noalpha = this.op8 || $.browser.mozilla && /Linux/.test(navigator.platform);

        if (typeof opts.alphaOverride != 'undefined')

            noalpha = opts.alphaOverride == 0 ? 1 : 0;



        if (full && this.pageBlock) this.remove(window, {fadeOut:0});

        // check to see if we were only passed the css object (a literal)

        if (msg && typeof msg == 'object' && !msg.jquery && !msg.nodeType) {

            css = msg;

            msg = null;

        }

        msg = msg ? (msg.nodeType ? $(msg) : msg) : full ? $.blockUI.defaults.pageMessage : $.blockUI.defaults.elementMessage;

        if (opts.displayMode)

            var basecss = jQuery.extend({}, $.blockUI.defaults.displayBoxCSS);

        else

            var basecss = jQuery.extend({}, full ? $.blockUI.defaults.pageMessageCSS : $.blockUI.defaults.elementMessageCSS);

        css = jQuery.extend(basecss, css || {});

        var f = ($.browser.msie) ? $('<iframe class="blockUI" style="z-index:1000;border:none;margin:0;padding:0;position:absolute;width:100%;height:100%;top:0;left:0" src="javascript:false;"></iframe>')

                                 : $('<div class="blockUI" style="display:none"></div>');

        var w = $('<div class="blockUI" style="z-index:1001;cursor:wait;border:none;margin:0;padding:0;width:100%;height:100%;top:0;left:0"></div>');

        var m = full ? $('<div class="blockUI blockMsg" style="z-index:1002;cursor:wait;padding:0;position:fixed"></div>')

                     : $('<div class="blockUI" style="display:none;z-index:1002;cursor:wait;position:absolute"></div>');

        w.css('position', full ? 'fixed' : 'absolute');

        if (msg) m.css(css);

        if (!noalpha) w.css($.blockUI.defaults.overlayCSS);

        if (this.op8) w.css({ width:''+el.clientWidth,height:''+el.clientHeight }); // lame

        if ($.browser.msie) f.css('opacity','0.0');



        $([f[0],w[0],m[0]]).appendTo(full ? 'body' : el);



        // ie7 must use absolute positioning in quirks mode and to account for activex issues (when scrolling)

        var expr = $.browser.msie && (!$.boxModel || $('object,embed', full ? null : el).length > 0);

        if (this.ie6 || expr) {

            // stretch content area if it's short

            if (full && $.blockUI.defaults.ie6Stretch && $.boxModel)

                $('html,body').css('height','100%');



            // fix ie6 problem when blocked element has a border width

            if ((this.ie6 || !$.boxModel) && !full) {

                var t = this.sz(el,'borderTopWidth'), l = this.sz(el,'borderLeftWidth');

                var fixT = t ? '(0 - '+t+')' : 0;

                var fixL = l ? '(0 - '+l+')' : 0;

            }



            // simulate fixed position

            $.each([f,w,m], function(i,o) {

                var s = o[0].style;

                s.position = 'absolute';

                if (i < 2) {

                    full ? s.setExpression('height','document.body.scrollHeight > document.body.offsetHeight ? document.body.scrollHeight : document.body.offsetHeight + "px"')

                         : s.setExpression('height','this.parentNode.offsetHeight + "px"');

                    full ? s.setExpression('width','jQuery.boxModel && document.documentElement.clientWidth || document.body.clientWidth + "px"')

                         : s.setExpression('width','this.parentNode.offsetWidth + "px"');

                    if (fixL) s.setExpression('left', fixL);

                    if (fixT) s.setExpression('top', fixT);

                }

                else {

                    if (full) s.setExpression('top','(document.documentElement.clientHeight || document.body.clientHeight) / 2 - (this.offsetHeight / 2) + (blah = document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop) + "px"');

                    s.marginTop = 0;

                }

            });

        }

        if (opts.displayMode) {

            w.css('cursor','default').attr('title', $.blockUI.defaults.closeMessage);

            m.css('cursor','default');

            $([f[0],w[0],m[0]]).removeClass('blockUI').addClass('displayBox');

            $().click($.blockUI.impl.boxHandler).bind('keypress', $.blockUI.impl.boxHandler);

        }

        else

            this.bind(1, el);

        m.append(msg).show();

        if (msg.jquery) msg.show();

        if (opts.displayMode) return;

        if (full) {

            this.pageBlock = m[0];

            this.pageBlockEls = $(':input:enabled:visible',this.pageBlock);

            setTimeout(this.focus, 20);

        }

        else this.center(m[0]);

    },

    remove: function(el, opts) {

        var o = $.extend({}, $.blockUI.defaults, opts);

        this.bind(0, el);

        var full = el == window;

        var els = full ? $('body').children().filter('.blockUI') : $('.blockUI', el);

        if (full) this.pageBlock = this.pageBlockEls = null;



        if (o.fadeOut) {

            els.fadeOut(o.fadeTime, function() {

                if (this.parentNode) this.parentNode.removeChild(this);

            });

        }

        else els.remove();

    },

    boxRemove: function(el) {

        $().unbind('click',$.blockUI.impl.boxHandler).unbind('keypress', $.blockUI.impl.boxHandler);

        if (this.boxCallback)

            this.boxCallback(this.box);

        $('body .displayBox').hide().remove();

    },

    // event handler to suppress keyboard/mouse events when blocking

    handler: function(e) {

        if (e.keyCode && e.keyCode == 9) {

            if ($.blockUI.impl.pageBlock && !$.blockUI.defaults.allowTabToLeave) {

                var els = $.blockUI.impl.pageBlockEls;

                var fwd = !e.shiftKey && e.target == els[els.length-1];

                var back = e.shiftKey && e.target == els[0];

                if (fwd || back) {

                    setTimeout(function(){$.blockUI.impl.focus(back)},10);

                    return false;

                }

            }

        }

        if ($(e.target).parents('div.blockMsg').length > 0)

            return true;

        return $(e.target).parents().children().filter('div.blockUI').length == 0;

    },

    boxHandler: function(e) {

        if ((e.keyCode && e.keyCode == 27) || (e.type == 'click' && $(e.target).parents('div.blockMsg').length == 0))

            $.blockUI.impl.boxRemove();

        return true;

    },

    // bind/unbind the handler

    bind: function(b, el) {

        var full = el == window;

        // don't bother unbinding if there is nothing to unbind

        if (!b && (full && !this.pageBlock || !full && !el.$blocked)) return;

        if (!full) el.$blocked = b;

        var $e = $(el).find('a,:input');

        $.each(['mousedown','mouseup','keydown','keypress','click'], function(i,o) {

            $e[b?'bind':'unbind'](o, $.blockUI.impl.handler);

        });

    },

    focus: function(back) {

        if (!$.blockUI.impl.pageBlockEls) return;

        var e = $.blockUI.impl.pageBlockEls[back===true ? $.blockUI.impl.pageBlockEls.length-1 : 0];

        if (e) e.focus();

    },

    center: function(el) {

		var p = el.parentNode, s = el.style;

        var l = ((p.offsetWidth - el.offsetWidth)/2) - this.sz(p,'borderLeftWidth');

        var t = ((p.offsetHeight - el.offsetHeight)/2) - this.sz(p,'borderTopWidth');

        s.left = l > 0 ? (l+'px') : '0';

        s.top  = t > 0 ? (t+'px') : '0';

    },

    sz: function(el, p) { return parseInt($.css(el,p))||0; }

};



})(jQuery);