@fancyapps/fancybox
Version:
Touch enabled, responsive and fully customizable jQuery lightbox script
251 lines (207 loc) • 6.95 kB
JavaScript
// ==========================================================================
//
// Thumbs
// Displays thumbnails in a grid
//
// ==========================================================================
(function (document, $) {
"use strict";
var CLASS = "fancybox-thumbs",
CLASS_ACTIVE = CLASS + "-active";
// Make sure there are default values
$.fancybox.defaults = $.extend(
true, {
btnTpl: {
thumbs: '<button data-fancybox-thumbs class="fancybox-button fancybox-button--thumbs" title="{{THUMBS}}">' +
'<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M14.59 14.59h3.76v3.76h-3.76v-3.76zm-4.47 0h3.76v3.76h-3.76v-3.76zm-4.47 0h3.76v3.76H5.65v-3.76zm8.94-4.47h3.76v3.76h-3.76v-3.76zm-4.47 0h3.76v3.76h-3.76v-3.76zm-4.47 0h3.76v3.76H5.65v-3.76zm8.94-4.47h3.76v3.76h-3.76V5.65zm-4.47 0h3.76v3.76h-3.76V5.65zm-4.47 0h3.76v3.76H5.65V5.65z"/></svg>' +
"</button>"
},
thumbs: {
autoStart: false, // Display thumbnails on opening
hideOnClose: true, // Hide thumbnail grid when closing animation starts
parentEl: ".fancybox-container", // Container is injected into this element
axis: "y" // Vertical (y) or horizontal (x) scrolling
}
},
$.fancybox.defaults
);
var FancyThumbs = function (instance) {
this.init(instance);
};
$.extend(FancyThumbs.prototype, {
$button: null,
$grid: null,
$list: null,
isVisible: false,
isActive: false,
init: function (instance) {
var self = this,
group = instance.group,
enabled = 0;
self.instance = instance;
self.opts = group[instance.currIndex].opts.thumbs;
instance.Thumbs = self;
self.$button = instance.$refs.toolbar.find("[data-fancybox-thumbs]");
// Enable thumbs if at least two group items have thumbnails
for (var i = 0, len = group.length; i < len; i++) {
if (group[i].thumb) {
enabled++;
}
if (enabled > 1) {
break;
}
}
if (enabled > 1 && !!self.opts) {
self.$button.removeAttr("style").on("click", function () {
self.toggle();
});
self.isActive = true;
} else {
self.$button.hide();
}
},
create: function () {
var self = this,
instance = self.instance,
parentEl = self.opts.parentEl,
list = [],
src;
if (!self.$grid) {
// Create main element
self.$grid = $('<div class="' + CLASS + " " + CLASS + "-" + self.opts.axis + '"></div>').appendTo(
instance.$refs.container
.find(parentEl)
.addBack()
.filter(parentEl)
);
// Add "click" event that performs gallery navigation
self.$grid.on("click", "a", function () {
instance.jumpTo($(this).attr("data-index"));
});
}
// Build the list
if (!self.$list) {
self.$list = $('<div class="' + CLASS + '__list">').appendTo(self.$grid);
}
$.each(instance.group, function (i, item) {
src = item.thumb;
if (!src && item.type === "image") {
src = item.src;
}
list.push(
'<a href="javascript:;" tabindex="0" data-index="' +
i +
'"' +
(src && src.length ? ' style="background-image:url(' + src + ')"' : 'class="fancybox-thumbs-missing"') +
"></a>"
);
});
self.$list[0].innerHTML = list.join("");
if (self.opts.axis === "x") {
// Set fixed width for list element to enable horizontal scrolling
self.$list.width(
parseInt(self.$grid.css("padding-right"), 10) +
instance.group.length *
self.$list
.children()
.eq(0)
.outerWidth(true)
);
}
},
focus: function (duration) {
var self = this,
$list = self.$list,
$grid = self.$grid,
thumb,
thumbPos;
if (!self.instance.current) {
return;
}
thumb = $list
.children()
.removeClass(CLASS_ACTIVE)
.filter('[data-index="' + self.instance.current.index + '"]')
.addClass(CLASS_ACTIVE);
thumbPos = thumb.position();
// Check if need to scroll to make current thumb visible
if (self.opts.axis === "y" && (thumbPos.top < 0 || thumbPos.top > $list.height() - thumb.outerHeight())) {
$list.stop().animate({
scrollTop: $list.scrollTop() + thumbPos.top
},
duration
);
} else if (
self.opts.axis === "x" &&
(thumbPos.left < $grid.scrollLeft() || thumbPos.left > $grid.scrollLeft() + ($grid.width() - thumb.outerWidth()))
) {
$list
.parent()
.stop()
.animate({
scrollLeft: thumbPos.left
},
duration
);
}
},
update: function () {
var that = this;
that.instance.$refs.container.toggleClass("fancybox-show-thumbs", this.isVisible);
if (that.isVisible) {
if (!that.$grid) {
that.create();
}
that.instance.trigger("onThumbsShow");
that.focus(0);
} else if (that.$grid) {
that.instance.trigger("onThumbsHide");
}
// Update content position
that.instance.update();
},
hide: function () {
this.isVisible = false;
this.update();
},
show: function () {
this.isVisible = true;
this.update();
},
toggle: function () {
this.isVisible = !this.isVisible;
this.update();
}
});
$(document).on({
"onInit.fb": function (e, instance) {
var Thumbs;
if (instance && !instance.Thumbs) {
Thumbs = new FancyThumbs(instance);
if (Thumbs.isActive && Thumbs.opts.autoStart === true) {
Thumbs.show();
}
}
},
"beforeShow.fb": function (e, instance, item, firstRun) {
var Thumbs = instance && instance.Thumbs;
if (Thumbs && Thumbs.isVisible) {
Thumbs.focus(firstRun ? 0 : 250);
}
},
"afterKeydown.fb": function (e, instance, current, keypress, keycode) {
var Thumbs = instance && instance.Thumbs;
// "G"
if (Thumbs && Thumbs.isActive && keycode === 71) {
keypress.preventDefault();
Thumbs.toggle();
}
},
"beforeClose.fb": function (e, instance) {
var Thumbs = instance && instance.Thumbs;
if (Thumbs && Thumbs.isVisible && Thumbs.opts.hideOnClose !== false) {
Thumbs.$grid.hide();
}
}
});
})(document, jQuery);