88 lines
1.8 KiB
JavaScript
88 lines
1.8 KiB
JavaScript
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/*!
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* jquery-scroll-glue
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* https://github.com/erming/jquery-scroll-glue
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*
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* Copyright 2014 Mattias Erming <mattias@mattiaserming.com>
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* MIT License
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*/
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(function($) {
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var append = $.fn.append;
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$.fn.append = function() {
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return append.apply(this, arguments).trigger("append");
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};
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var html = $.fn.html;
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$.fn.html = function() {
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var result = html.apply(this, arguments);
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if (arguments.length) {
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// Only trigger this event when something
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// has been inserted.
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this.trigger("html");
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}
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return result;
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};
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$.fn.scrollGlue = function(options) {
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var settings = $.extend({
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animate: 0
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}, options);
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var self = this;
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if (self.size() > 1) {
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return self.each(function() {
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$(this).scrollGlue(options);
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});
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}
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var timer;
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var resizing = false;
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$(window).on("resize", function() {
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// This will prevent the scroll event from triggering
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// while resizing the window.
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resizing = true;
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clearTimeout(timer);
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timer = setTimeout(function() {
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resizing = false;
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}, 100);
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if (sticky) {
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self.scrollToBottom();
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}
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});
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var sticky = false;
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self.on("scroll", function() {
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if (!resizing) {
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sticky = self.isScrollAtBottom();
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}
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});
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self.trigger("scroll");
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self.on("append html", function() {
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if (sticky) {
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self.scrollToBottom(settings.animate);
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}
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});
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return this;
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};
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$.fn.scrollToBottom = function(animate) {
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return this.each(function() {
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$(this).finish().animate({scrollTop: this.scrollHeight}, animate || 0);
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});
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};
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$.fn.isScrollAtBottom = function() {
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if ((this.scrollTop() + this.outerHeight() + 1) >= this.prop("scrollHeight")) {
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return true;
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}
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};
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// Find elements with the 'scroll-glue' attribute and
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// activate the plugin.
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$("[scroll-glue]").scrollGlue();
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})(jQuery);
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