// Licensed to Cloudera, Inc. under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. Cloudera, Inc. licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/*
* jHue scroll to top plugin
* Can be used globally with
* $.jHueScrollUp()
* or with a target for the scroll up
* $(element).jHueScrollUp()
*
* options:
* - threshold: (default 100) value in pixels, scroll amount before the link appears
* - secondClickScrollToTop: (default false) if specified, the anchor stays for longer and you can re-click on it to scroll to this element
*/
(function ($, window, document, undefined) {
var pluginName = "jHueScrollUp",
defaults = {
threshold: 100, // it displays it after 100 px of scroll
secondClickScrollToTop: false
};
function Plugin(element, options) {
this.element = element;
this.options = $.extend({}, defaults, options);
this._defaults = defaults;
this._name = pluginName;
this.init();
}
Plugin.prototype.setOptions = function (options) {
this.options = $.extend({}, defaults, options);
};
Plugin.prototype.init = function () {
var _this = this;
var link = $("").attr("id", "jHueScrollUpAnchor").attr("href", "javascript:void(0)").html("").appendTo("body");
if ($("#jHueScrollUpAnchor").length > 0) { // just one scroll up per page
link = $("#jHueScrollUpAnchor");
link.off("click");
}
if ($(_this.element).is("body")) {
$(window).scroll(function () {
$(($(window).scrollTop() > _this.options.threshold) ? link.fadeIn(200) : link.fadeOut(200));
});
link.click(function (event) {
$("body, html").animate({scrollTop: $(_this.element).position().top}, 300);
return false;
});
}
else {
$(_this.element).scroll(function () {
var _fadeOutMs = 200;
if (_this.options.secondClickScrollToTop) {
_fadeOutMs = 1000;
}
$(($(_this.element).scrollTop() > _this.options.threshold) ? link.fadeIn(200) : link.fadeOut(_fadeOutMs));
});
link.on("click", function (event) {
event.preventDefault();
event.stopImmediatePropagation();
if (_this.options.secondClickScrollToTop) {
if ($(_this.element).data("lastClick") == null || (new Date()).getTime() - $(_this.element).data("lastClick") > 1500) {
$(_this.element).animate({scrollTop: 0}, 300);
}
else {
$("body, html").animate({scrollTop: 0}, 300);
link.fadeOut(200);
}
$(_this.element).data("lastClick", (new Date()).getTime());
}
else {
$(_this.element).animate({scrollTop: 0}, 300);
}
return false;
});
}
};
$.fn[pluginName] = function (options) {
return this.each(function () {
$.data(this, 'plugin_' + pluginName, new Plugin(this, options));
});
}
$[pluginName] = function (options) {
new Plugin($("body"), options);
};
})(jQuery, window, document);