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/**
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* Zoomify
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* A jQuery plugin for simple lightboxes with zoom effect.
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* http://indrimuska.github.io/zoomify
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*
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* (c) 2015 Indri Muska - MIT
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*/
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;(function($){
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// initialization
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Zoomify = function (element, options) {
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var that = this;
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this._zooming = false;
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this._zoomed = false;
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this._timeout = null;
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this.$shadow = null;
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this.$image = $(element).addClass('zoomify');
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this.options = $.extend({}, Zoomify.DEFAULTS, this.$image.data(), options);
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this.$image.on('click', function () { that.zoom(); });
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$(window).on('resize', function () { that.reposition(); });
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$(document).on('scroll', function () { that.reposition(); });
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};
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Zoomify.DEFAULTS = {
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duration: 200,
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easing: 'linear',
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scale: 0.9
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};
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// css utilities
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Zoomify.prototype.transition = function ($element, value) {
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$element.css({
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'-webkit-transition': value,
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'-moz-transition': value,
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'-ms-transition': value,
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'-o-transition': value,
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'transition': value
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});
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};
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Zoomify.prototype.addTransition = function ($element) {
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this.transition($element, 'all ' + this.options.duration + 'ms ' + this.options.easing);
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};
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Zoomify.prototype.removeTransition = function ($element, callback) {
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var that = this;
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clearTimeout(this._timeout);
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this._timeout = setTimeout(function () {
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that.transition($element, '');
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if ($.isFunction(callback)) callback.call(that);
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}, this.options.duration);
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};
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Zoomify.prototype.transform = function (value) {
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this.$image.css({
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'-webkit-transform': value,
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'-moz-transform': value,
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'-ms-transform': value,
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'-o-transform': value,
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'transform': value
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});
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};
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Zoomify.prototype.transformScaleAndTranslate = function (scale, translateX, translateY, callback) {
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this.addTransition(this.$image);
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this.transform('scale(' + scale + ') translate(' + translateX + 'px, ' + translateY + 'px)');
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this.removeTransition(this.$image, callback);
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};
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// zooming functions
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Zoomify.prototype.zoom = function () {
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if (this._zooming) return;
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if (this._zoomed) this.zoomOut();
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else this.zoomIn();
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};
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Zoomify.prototype.zoomIn = function () {
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var that = this,
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transform = this.$image.css('transform');
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this.$image.css("opacity",1)
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this.transition(this.$image, 'none');
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this.transform('none');
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var offset = this.$image.offset(),
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width = this.$image.outerWidth(),
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height = this.$image.outerHeight(),
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nWidth = this.$image[0].naturalWidth || +Infinity,
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nHeight = this.$image[0].naturalHeight || +Infinity,
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wWidth = $(window).width(),
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wHeight = $(window).height(),
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scaleX = Math.min(nWidth, wWidth * this.options.scale) / width,
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scaleY = Math.min(nHeight, wHeight * this.options.scale) / height,
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scale = Math.min(scaleX, scaleY),
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translateX = (-offset.left + (wWidth - width) / 2) / scale,
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translateY = (-offset.top + (wHeight - height) / 2 + $(document).scrollTop()) / scale;
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this.transform(transform);
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this._zooming = true;
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this.$image.addClass('zoomed').trigger('zoom-in.zoomify');
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setTimeout(function () {
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that.addShadow();
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that.transformScaleAndTranslate(scale, translateX, translateY, function () {
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that._zooming = false;
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that.$image.trigger('zoom-in-complete.zoomify');
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});
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that._zoomed = true;
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});
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};
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Zoomify.prototype.zoomOut = function () {
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var that = this;
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this.$image.css("opacity",0)
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this._zooming = true;
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this.$image.trigger('zoom-out.zoomify');
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this.transformScaleAndTranslate(1, 0, 0, function () {
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that._zooming = false;
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that.$image.removeClass('zoomed').trigger('zoom-out-complete.zoomify');
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});
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this.removeShadow();
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this._zoomed = false;
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};
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// page listener callbacks
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Zoomify.prototype.reposition = function () {
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if (this._zoomed) {
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this.transition(this.$image, 'none');
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this.zoomIn();
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}
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};
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// shadow background
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Zoomify.prototype.addShadow = function () {
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var that = this;
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if (this._zoomed) return;
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if (that.$shadow) that.$shadow.remove();
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this.$shadow = $('<div class="zoomify-shadow"></div>');
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$('body').append(this.$shadow);
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this.addTransition(this.$shadow);
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this.$shadow.on('click', function () { that.zoomOut(); })
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setTimeout(function () { that.$shadow.addClass('zoomed'); }, 10);
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};
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Zoomify.prototype.removeShadow = function () {
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var that = this;
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if (!this.$shadow) return;
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this.addTransition(this.$shadow);
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this.$shadow.removeClass('zoomed');
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this.$image.one('zoom-out-complete.zoomify', function () {
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if (that.$shadow) that.$shadow.remove();
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that.$shadow = null;
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});
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};
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// plugin definition
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$.fn.zoomify = function (option) {
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return this.each(function () {
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var $this = $(this),
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zoomify = $this.data('zoomify');
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if (!zoomify) $this.data('zoomify', (zoomify = new Zoomify(this, typeof option == 'object' && option)));
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if (typeof option == 'string' && ['zoom', 'zoomIn', 'zoomOut', 'reposition'].indexOf(option) >= 0) zoomify[option]();
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});
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};
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})(jQuery);
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