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/**
 * Within Viewport jQuery Plugin
 *
 * @description Companion plugin for withinviewport.js - determines whether an element is completely within the browser viewport
 * @author      Craig Patik, http://patik.com/
 * @version     2.1.2
 * @date        2019-08-16
 */
(function ($) {
    /**
     * $.withinviewport()
     * @description          jQuery method
     * @param  {Object}      [settings] optional settings
     * @return {Collection}  Contains all elements that were within the viewport
     */
    $.fn.withinviewport = function (settings) {
        var opts;
        var elems;

if (typeof settings === 'string') {
            settings = {
                sides: settings
            };
        }

opts = $.extend({}, settings, {
            sides: 'all'
        });
        elems = [];

this.each(function () {
            if (withinviewport(this, opts)) {
                elems.push(this);
            }
        });

return $(elems);
    };

// Main custom selector
    $.extend($.expr[':'], {
        'within-viewport': function (element) {
            return withinviewport(element, 'all');
        }
    });

/**
     * Optional enhancements and shortcuts
     *
     * @description Uncomment or comment these pieces as they apply to your project and coding preferences
     */

// Shorthand jQuery methods

$.fn.withinviewporttop = function (settings) {
        var opts;
        var elems;

if (typeof settings === 'string') {
            settings = {
                sides: settings
            };
        }

opts = $.extend({}, settings, {
            sides: 'top'
        });
        elems = [];

this.each(function () {
            if (withinviewport(this, opts)) {
                elems.push(this);
            }
        });

return $(elems);
    };

$.fn.withinviewportright = function (settings) {
        var opts;
        var elems;

if (typeof settings === 'string') {
            settings = {
                sides: settings
            };
        }

opts = $.extend({}, settings, {
            sides: 'right'
        });
        elems = [];

this.each(function () {
            if (withinviewport(this, opts)) {
                elems.push(this);
            }
        });

return $(elems);
    };

$.fn.withinviewportbottom = function (settings) {
        var opts;
        var elems;

if (typeof settings === 'string') {
            settings = {
                sides: settings
            };
        }

opts = $.extend({}, settings, {
            sides: 'bottom'
        });
        elems = [];

this.each(function () {
            if (withinviewport(this, opts)) {
                elems.push(this);
            }
        });

return $(elems);
    };

$.fn.withinviewportleft = function (settings) {
        var opts;
        var elems;

if (typeof settings === 'string') {
            settings = {
                sides: settings
            };
        }

opts = $.extend({}, settings, {
            sides: 'left'
        });
        elems = [];

this.each(function () {
            if (withinviewport(this, opts)) {
                elems.push(this);
            }
        });

return $(elems);
    };

// Custom jQuery selectors
    $.extend($.expr[':'], {
        'within-viewport-top': function (element) {
            return withinviewport(element, 'top');
        },
        'within-viewport-right': function (element) {
            return withinviewport(element, 'right');
        },
        'within-viewport-bottom': function (element) {
            return withinviewport(element, 'bottom');
        },
        'within-viewport-left': function (element) {
            return withinviewport(element, 'left');
        }
        // Example custom selector:
        //,
        // 'within-viewport-top-left-45': function (element) {
        //     return withinviewport(element, {sides:'top left', top: 45, left: 45});
        // }
    });
}(jQuery));