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Current File : //var/www/pn/wp-content/themes/intosai/assets/scripts/plugins/jquery-visible/jquery.visible.js

(function($){

    /**
     * Copyright 2012, Digital Fusion
     * Licensed under the MIT license.
     * http://teamdf.com/jquery-plugins/license/
     *
     * @author Sam Sehnert
     * @desc A small plugin that checks whether elements are within
     *       the user visible viewport of a web browser.
     *       only accounts for vertical position, not horizontal.
     */
    var $w=$(window);
    $.fn.visible = function(partial,hidden,direction,container){

        if (this.length < 1)
            return;

	// Set direction default to 'both'.
	direction = direction || 'both';

        var $t          = this.length > 1 ? this.eq(0) : this,
						isContained = typeof container !== 'undefined' && container !== null,
						$c				  = isContained ? $(container) : $w,
						wPosition        = isContained ? $c.position() : 0,
            t           = $t.get(0),
            vpWidth     = $c.outerWidth(),
            vpHeight    = $c.outerHeight(),
            clientSize  = hidden === true ? t.offsetWidth * t.offsetHeight : true;

        if (typeof t.getBoundingClientRect === 'function'){

            // Use this native browser method, if available.
            var rec = t.getBoundingClientRect(),
                tViz = isContained ?
												rec.top - wPosition.top >= 0 && rec.top < vpHeight + wPosition.top :
												rec.top >= 0 && rec.top < vpHeight,
                bViz = isContained ?
												rec.bottom - wPosition.top > 0 && rec.bottom <= vpHeight + wPosition.top :
												rec.bottom > 0 && rec.bottom <= vpHeight,
                lViz = isContained ?
												rec.left - wPosition.left >= 0 && rec.left < vpWidth + wPosition.left :
												rec.left >= 0 && rec.left <  vpWidth,
                rViz = isContained ?
												rec.right - wPosition.left > 0  && rec.right < vpWidth + wPosition.left  :
												rec.right > 0 && rec.right <= vpWidth,
                vVisible   = partial ? tViz || bViz : tViz && bViz,
                hVisible   = partial ? lViz || rViz : lViz && rViz,
		vVisible = (rec.top < 0 && rec.bottom > vpHeight) ? true : vVisible,
                hVisible = (rec.left < 0 && rec.right > vpWidth) ? true : hVisible;

            if(direction === 'both')
                return clientSize && vVisible && hVisible;
            else if(direction === 'vertical')
                return clientSize && vVisible;
            else if(direction === 'horizontal')
                return clientSize && hVisible;
        } else {

            var viewTop 				= isContained ? 0 : wPosition,
                viewBottom      = viewTop + vpHeight,
                viewLeft        = $c.scrollLeft(),
                viewRight       = viewLeft + vpWidth,
                position          = $t.position(),
                _top            = position.top,
                _bottom         = _top + $t.height(),
                _left           = position.left,
                _right          = _left + $t.width(),
                compareTop      = partial === true ? _bottom : _top,
                compareBottom   = partial === true ? _top : _bottom,
                compareLeft     = partial === true ? _right : _left,
                compareRight    = partial === true ? _left : _right;

            if(direction === 'both')
                return !!clientSize && ((compareBottom <= viewBottom) && (compareTop >= viewTop)) && ((compareRight <= viewRight) && (compareLeft >= viewLeft));
            else if(direction === 'vertical')
                return !!clientSize && ((compareBottom <= viewBottom) && (compareTop >= viewTop));
            else if(direction === 'horizontal')
                return !!clientSize && ((compareRight <= viewRight) && (compareLeft >= viewLeft));
        }
    };

})(jQuery);

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