/*Speech Bubbles Tooltip (Initial: Dec 8th, 2010)
* This notice must stay intact for usage 
* Author: Dynamic Drive at http://www.dynamicdrive.com/
* Visit http://www.dynamicdrive.com/ for full source code
*/

var speechbubbles_tooltip = {

    loadcontent: function ($, selector, options, callback) {
        var ajaxfriendlyurl = options.url.replace(/^http:\/\/[^\/]+\//i, "http://" + window.location.hostname + "/")
        $.ajax({
            url: ajaxfriendlyurl, //path to external content
            async: true,
            error: function (ajaxrequest) {
                //alert('Error fetching Ajax content.<br />Server Response: ' + ajaxrequest.responseText)
            },
            success: function (content) {
                $(document.body).append(content)
                callback(selector)
                $(content).remove()
            }
        })

    },

    buildtooltip: function ($, setting) {
        var speechtext = (setting.speechid) ? $('div#' + setting.speechid).html() : setting.speechtext
        if (speechtext) {
            $speech = $('<div class="speechbubbles">' + speechtext + '</div>').appendTo(document.body)
            $speech.addClass('speechbubbles').append('<div class="speechbubbles-arrow-border"></div>\n<div class="speechbubbles-arrow"></div>')
            $speech.data('$arrowparts', $speech.find('div.speechbubbles-arrow, div.speechbubbles-arrow-border')) //store ref to the two arrow DIVs within tooltip
            var arrowheight = (window.XMLHttpRequest) ? $speech.data('$arrowparts').eq(0).outerHeight() : 10
            $speech.data('measure', { w: $speech.outerWidth(), h: $speech.outerHeight() + arrowheight, arroww: $speech.data('$arrowparts').eq(0).outerWidth() }) //cache tooltip dimensions
            $speech.css({ display: 'none', visibility: 'visible' })
            setting.$speech = $speech //remember ref to tooltip
        }
        return setting.$speech
    },


    positiontip: function ($, $anchor, s, e) {
        var $speech = s.$speech
        var $offset = $anchor.offset()
        var windowmeasure = { w: $(window).width(), h: $(window).height(), left: $(document).scrollLeft(), top: $(document).scrollTop()} //get various window measurements
        var anchormeasure = { w: $anchor.outerWidth(), h: $anchor.outerHeight(), left: $offset.left, top: $offset.top} //get various anchor link measurements
        var speechmeasure = { w: $speech.data('measure').w, h: $speech.data('measure').h} //get tooltip measurements
        var x = anchormeasure.left
        var y = anchormeasure.top + anchormeasure.h
        x = (x + speechmeasure.w > windowmeasure.left + windowmeasure.w - 3) ? x - speechmeasure.w + anchormeasure.w - 5 : x //right align tooltip if no space to the right of the anchor
        y = (y + speechmeasure.h > windowmeasure.top + windowmeasure.h) ? y - speechmeasure.h - anchormeasure.h - 10 : y + 10 //top align tooltip if no space to the bottom of the anchor
        var isrightaligned = x != anchormeasure.left //Boolean to indicate if tooltip is right aligned
        var istopaligned = y != anchormeasure.top + anchormeasure.h + 10 //Boolean to indicate if tooltip is top aligned
        $speech.removeClass('downversion').addClass(istopaligned ? 'downversion' : '') //add CSS "downversion" class to tooltip if arrow should be pointing down
        var arrowpos = (isrightaligned) ? speechmeasure.w - (anchormeasure.left + anchormeasure.w - e.pageX) - 25 : e.pageX - anchormeasure.left - 25 //25 is to move arrow 25px to the left so it's not obscured by cursor
        if (arrowpos > speechmeasure.w - 25) //if arrow exceeds the width of the tooltip
            arrowpos = speechmeasure.w - 40 //move it to the left of the cursor
        else {
            arrowpos = (isrightaligned) ? Math.max(anchormeasure.left - x + 10, arrowpos) : Math.max(15, arrowpos) //make sure arrow doesn't appear too far to the left of the tooltip
        }
        $speech.data('$arrowparts').css('left', arrowpos)
        var speechcss_before = { opacity: 0, left: x, top: (istopaligned) ? y - speechmeasure.h - 10 : y + speechmeasure.h + 10 }
        var speechcss_after = { opacity: 1, top: y + 10 }
        if (document.all && !window.msPerformance) { //detect IE8 and below
            delete speechcss_before.opacity //remove opacity property, as IE8- does not animate this property well with CSS triangles present
            delete speechcss_after.opacity
        }
        $speech.css(speechcss_before).show().animate(speechcss_after)
    },


    init: function ($, $anchor, options) {
        var s = { speechtext: $anchor.attr('title'), speechid: $anchor.attr('rel') }
        $.extend(s, options)
        if (this.buildtooltip($, s)) {
            if (s.speechtext) //if title attribute of anchor is defined
                $anchor.attr('title', "") //disable it
            $anchor.mouseenter(function (e) {
                if (s.$speech.queue().length == 0) {
                    clearTimeout(s.hidetimer)
                    speechbubbles_tooltip.positiontip($, $anchor, s, e)
                }
            })
            $anchor.mouseleave(function (e) {
                s.hidetimer = setTimeout(function () { s.$speech.stop(true, true).hide() }, 200)
            })
        }
    }

}

jQuery.fn.speechbubble = function (options) {
    var $ = jQuery
    function processanchor(selector) {
        return selector.each(function () { //return jQuery obj
            var $anchor = $(this)
            speechbubbles_tooltip.init($, $anchor, options)
        })
    }
    if (options && options.url)
        speechbubbles_tooltip.loadcontent($, this, options, processanchor)
    else
        processanchor(this)
};