גרסה מ־17:41, 4 בפברואר 2021

/*
*   MultiSlider | MIT License
*
*   Copyright (c) 2017 Trevor Blackman
*   http://www.multislider.info
*
*/
$(document).ready(function () {
    (function ($) {

        // ==== BEGINS PLUGGIN ====
        $.fn.multislider = function (data, callback) {

            // ==== CACHE DOM ====
            var $multislider = $(this);
            var $msContent = $multislider.find('.nmpIndexSliderContent');
            var $msRight = $multislider.find('button.nmpIndexSliderButtonRight');
            var $msLeft = $multislider.find('button.nmpIndexSliderButtonLeft');
            var $imgFirst = $msContent.find('.nmpIndexSliderItem:first');

            // === DETERMINE ACTION ====
            // string = method | object or nothing is to initialize
            if (typeof data === 'string') {
                getStringArgs(data);
                return $multislider;
            } else if (typeof data === 'object' || typeof data === 'undefined') {
                init();
            }

            // ==== PLUGGIN VARIABLES ====
            var $imgLast,
                totalWidth,
                numberVisibleSlides,
                animateDistance,
                animateSlideRight,
                animateSlideLeft,
                defaults,
                settings,
                animateDuration,
                autoSlideInterval;

            // = INITIALIZE =
            function init() {
                minifyContent();        // minify html
                createSettings();       // merge defaults and user provided options
                saveData();             // add data object to DOM el with reference to animation functions, allows for methods to reference at any time
                selectAnimations();     // choose default animation
            }


            // ==== EVENT HANDLERS ====
            $msRight.on('click', animateSlideLeft);
            $msLeft.on('click', animateSlideRight);
            $multislider.on('click', '.nmpIndexSliderButtonRight, .nmpIndexSliderButtonLeft', resetInterval);
            $(window).on('resize', findItemWidth);


            // ==== FUNCTIONS (for days...) ====
            // =================================

            function pauseAbove() {
                if (window.innerWidth > settings.pauseAbove) { $multislider.addClass('ms-PAUSE'); }
                $(window).on('resize', function () {
                    if (window.innerWidth > settings.pauseAbove) {
                        $multislider.addClass('ms-PAUSE');
                    } else {
                        $multislider.removeClass('ms-PAUSE');
                    }
                });
            }

            function pauseBelow() {
                if (window.innerWidth < settings.pauseBelow) { $multislider.addClass('ms-PAUSE'); }
                $(window).on('resize', function () {
                    if (window.innerWidth < settings.pauseBelow) {
                        $multislider.addClass('ms-PAUSE');
                    } else {
                        $multislider.removeClass('ms-PAUSE');
                    }
                });
            }

            // used if method is called after initialization
            function getStringArgs(str) {
                if (typeof $multislider.data(str) !== 'undefined') {
                    $multislider.data(str)();
                } else {
                    console.error("Multislider currently only accepts the following methods: next, prev, pause, play");
                }
            }

            // saves data object to DOM element
            function saveData() {
                $multislider.data({
                    "pause": function () { $multislider.addClass('ms-PAUSE'); },
                    "unPause": function () { $multislider.removeClass('ms-PAUSE'); },
                    "continuous": function () { $multislider.removeClass('ms-PAUSE'); continuousLeft(); },
                    "next": function () { overRidePause(singleLeft); },
                    "nextAll": function () { overRidePause(allLeft); },
                    "prev": function () { overRidePause(singleRight); },
                    "prevAll": function () { overRidePause(allRight); },
                    "settings": settings
                });
            }

            // used when calling 'next', 'prev' methods
            function overRidePause(animation) {
                if ($multislider.hasClass('ms-PAUSE')) {
                    $multislider.removeClass('ms-PAUSE');
                    animation();
                    $multislider.addClass('ms-PAUSE');
                } else {
                    animation();
                }
                resetInterval();
            }

            // CRITICAL for items to be perfectly side-by-side without floating them
            function minifyContent() {
                $msContent.contents().filter(function () {
                    return (this.nodeType == 3 && !/\S/.test(this.nodeValue));
                }).remove();
            }

            // updated options with defaults, measure slide widths for animation calculations, carry out setting implementations
            function createSettings() {
                defaults = settings || {
                    continuous: false,	// endless scrolling with no pauses
                    slideAll: false,	// slide all visible slides, or just one at a time
                    // autoSlide: true,	// DEPRECATED
                    interval: 2000,		// time bewteen slide animation, 0 or 'false' prevents auto-sliding
                    duration: 500,	    // duration of slide animation
                    hoverPause: true,	// pause slideshow on hover
                    pauseAbove: null,   // pause above specified screen width
                    pauseBelow: null    // pause below specified screen width
                };

                settings = $.extend({}, defaults, data);

                findItemWidth();
                animateDuration = settings.duration;

                if (settings.hoverPause) { pauseHover(); }
                // autoSlide is being depricated | Feb 2 2017
                if (settings.continuous !== true && settings.interval !== 0 && settings.interval !== false && settings.autoSlide !== false) { autoSlide(); }
                if (settings.pauseAbove !== null && typeof settings.pauseAbove === 'number') { pauseAbove(); }
                if (settings.pauseBelow !== null && typeof settings.pauseBelow === 'number') { pauseBelow(); }
            }

            // determine between single and multi-slide animations
            function selectAnimations() {
                if (settings.continuous) {
                    settings.autoSlide = false;
                    continuousLeft();
                } else if (settings.slideAll) {
                    animateSlideRight = $multislider.data('prevAll');
                    animateSlideLeft = $multislider.data('nextAll');
                } else {
                    animateSlideRight = $multislider.data('prev');
                    animateSlideLeft = $multislider.data('next');
                }
            }

            // measure slide width, for animation calculations
            function findItemWidth() {
                reTargetSlides();
                animateDistance = $imgFirst.width();
                var left = parseInt($msContent.find('.nmpIndexSliderItem:first').css('padding-left'));
                var right = parseInt($msContent.find('.nmpIndexSliderItem:first').css('padding-right'));
                if (left !== 0) { animateDistance += left; }
                if (right !== 0) { animateDistance += right; }
            }

            // recursive auto-slide loop
            function autoSlide() {
                autoSlideInterval = setInterval(function () {
                    if (!$multislider.hasClass('ms-PAUSE')) {
                        animateSlideLeft();
                    }
                }, settings.interval);
            }

            function resetInterval() {
                if (settings.interval !== 0 && settings.interval !== false && settings.continuous !== true) {
                    clearInterval(autoSlideInterval);
                    autoSlide();
                }
            }

            // target first and last visible slides before each new animation
            function reTargetSlides() {
                $imgFirst = $msContent.find('.nmpIndexSliderItem:first');
                $imgLast = $msContent.find('.nmpIndexSliderItem:last');
            }

            // prevent animation firing if multislider is currently animating
            // all animations pass through this function, which emits events, and adds/removes animating class
            function isItAnimating(callback) {
                if (!$multislider.hasClass('ms-animating') &&
                    !$multislider.hasClass('ms-HOVER') &&
                    !$multislider.hasClass('ms-PAUSE')) {
                    $multislider.trigger('ms.before.animate'); // event!
                    $multislider.addClass('ms-animating');
                    callback();    //callback is animation
                }
            }

            // update multislider at the end of each animation
            function doneAnimating() {
                if ($multislider.hasClass('ms-animating')) {
                    $multislider.removeClass('ms-animating');
                    $multislider.trigger('ms.after.animate'); // event!
                }
            }

            // logic for pausing and restarting the multislider on hover
            function pauseHover() {
                // continuous scroll pause slightly different
                if (settings.continuous) {
                    $msContent.on('mouseover', function () {
                        doneAnimating();
                        $msContent.children('.nmpIndexSliderItem:first').stop();
                    });
                    $msContent.on('mouseout', function () {
                        continuousLeft();
                    });
                } else {
                    // regular animation pausing
                    $msContent.on('mouseover', function () {
                        $multislider.addClass('ms-HOVER');
                    });
                    $msContent.on('mouseout', function () {
                        $multislider.removeClass('ms-HOVER');
                    });
                }
            }

            // calculate remaining animation, if stopped mid-animation and resuming
            function midAnimateResume() {
                animateDuration = settings.duration;
                var currentMargin = parseFloat($msContent.find('.nmpIndexSliderItem:first').css("margin-left"));
                var percentageRemaining = 1 - (currentMargin / -(animateDistance - 1));
                animateDuration = percentageRemaining * animateDuration;
            }

            // determine how many slides need to be moved over, if slideAll is true
            function calcNumSlidesToMove() {
                totalWidth = $msContent.width();						          // total width of .nmpIndexSliderContent containing all visible slides
                numberVisibleSlides = Math.floor(totalWidth / animateDistance);     // number of (visible) slides needed to be moved in each animation
            }


            // ==== ANIMATION FUNCTIONS ====
            // =============================
            function continuousLeft() {
                isItAnimating(function () {
                    reTargetSlides();
                    midAnimateResume();
                    $imgFirst.animate(
                        { marginLeft: -(animateDistance + 1) },
                        {
                            duration: animateDuration,
                            easing: "linear",
                            complete: function () {
                                $imgFirst.insertAfter($imgLast).removeAttr("style");
                                doneAnimating();
                                continuousLeft();
                            }
                        }
                    );
                });
            }

            function allLeft() {
                isItAnimating(function () {
                    reTargetSlides();
                    calcNumSlidesToMove();

                    var $clonedItemSet = $msContent.children('.nmpIndexSliderItem').clone();
                    var filteredClones = $clonedItemSet.splice(0, numberVisibleSlides);

                    $msContent.append(filteredClones);

                    $imgFirst.animate(
                        { marginLeft: -totalWidth }, {
                        duration: animateDuration,
                        easing: "swing",
                        complete: function () {
                            $($msContent.children('.nmpIndexSliderItem').splice(0, numberVisibleSlides)).remove();
                            doneAnimating();
                        }
                    }
                    );
                });
            }

            function allRight() {
                isItAnimating(function () {
                    reTargetSlides();
                    calcNumSlidesToMove();

                    var numberTotalSlides = $msContent.children('.nmpIndexSliderItem').length;
                    var $clonedItemSet = $msContent.children('.nmpIndexSliderItem').clone();
                    var filteredClones = $clonedItemSet.splice(numberTotalSlides - numberVisibleSlides, numberTotalSlides);

                    $($(filteredClones)[0]).css('margin-left', -totalWidth); // give clone array negative margin before preppending
                    $msContent.prepend(filteredClones);

                    reTargetSlides();

                    $imgFirst.animate(
                        {
                            marginLeft: 0
                        }, {
                        duration: animateDuration,
                        easing: "swing",
                        complete: function () {
                            numberTotalSlides = $msContent.find('nmpIndexSliderItem').length;
                            $($msContent.find('.nmpIndexSliderItem').splice(numberTotalSlides - numberVisibleSlides, numberTotalSlides)).remove();
                            $imgFirst.removeAttr('style');
                            doneAnimating();
                        }
                    }
                    );
                });
            }

            function singleLeft() {
                isItAnimating(function () {
                    reTargetSlides();
                    $imgFirst.animate(
                        {
                            marginLeft: -animateDistance
                        }, {
                        duration: animateDuration,
                        easing: "swing",
                        complete: function () {
                            $imgFirst.detach().removeAttr('style').appendTo($msContent);
                            doneAnimating();
                        }
                    }
                    );
                });
            }

            function singleRight() {
                isItAnimating(function () {
                    reTargetSlides();
                    $imgLast.css('margin-left', -animateDistance).prependTo($msContent);
                    $imgLast.animate(
                        {
                            marginLeft: 0
                        }, {
                        duration: animateDuration,
                        easing: "swing",
                        complete: function () {
                            $imgLast.removeAttr("style");
                            doneAnimating();
                        }
                    }
                    );
                });
            }
            return $multislider;
        }
    })(jQuery);


    $('#nmpIndexSliderContainer').multislider({
        interval: 4000,
        slideAll: true,
        duration: 1500
    });
});