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Diffstat (limited to 'static/js/bootstrap-affix.js')
| -rw-r--r-- | static/js/bootstrap-affix.js | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/static/js/bootstrap-affix.js b/static/js/bootstrap-affix.js new file mode 100644 index 0000000..827ff45 --- /dev/null +++ b/static/js/bootstrap-affix.js @@ -0,0 +1,117 @@ +/* ========================================================== + * bootstrap-affix.js v2.3.1 + * http://twitter.github.com/bootstrap/javascript.html#affix + * ========================================================== + * Copyright 2012 Twitter, Inc. + * + * Licensed 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. + * ========================================================== */ + + +!function ($) { + + "use strict"; // jshint ;_; + + + /* AFFIX CLASS DEFINITION + * ====================== */ + + var Affix = function (element, options) { + this.options = $.extend({}, $.fn.affix.defaults, options) + this.$window = $(window) + .on('scroll.affix.data-api', $.proxy(this.checkPosition, this)) + .on('click.affix.data-api', $.proxy(function () { setTimeout($.proxy(this.checkPosition, this), 1) }, this)) + this.$element = $(element) + this.checkPosition() + } + + Affix.prototype.checkPosition = function () { + if (!this.$element.is(':visible')) return + + var scrollHeight = $(document).height() + , scrollTop = this.$window.scrollTop() + , position = this.$element.offset() + , offset = this.options.offset + , offsetBottom = offset.bottom + , offsetTop = offset.top + , reset = 'affix affix-top affix-bottom' + , affix + + if (typeof offset != 'object') offsetBottom = offsetTop = offset + if (typeof offsetTop == 'function') offsetTop = offset.top() + if (typeof offsetBottom == 'function') offsetBottom = offset.bottom() + + affix = this.unpin != null && (scrollTop + this.unpin <= position.top) ? + false : offsetBottom != null && (position.top + this.$element.height() >= scrollHeight - offsetBottom) ? + 'bottom' : offsetTop != null && scrollTop <= offsetTop ? + 'top' : false + + if (this.affixed === affix) return + + this.affixed = affix + this.unpin = affix == 'bottom' ? position.top - scrollTop : null + + this.$element.removeClass(reset).addClass('affix' + (affix ? '-' + affix : '')) + } + + + /* AFFIX PLUGIN DEFINITION + * ======================= */ + + var old = $.fn.affix + + $.fn.affix = function (option) { + return this.each(function () { + var $this = $(this) + , data = $this.data('affix') + , options = typeof option == 'object' && option + if (!data) $this.data('affix', (data = new Affix(this, options))) + if (typeof option == 'string') data[option]() + }) + } + + $.fn.affix.Constructor = Affix + + $.fn.affix.defaults = { + offset: 0 + } + + + /* AFFIX NO CONFLICT + * ================= */ + + $.fn.affix.noConflict = function () { + $.fn.affix = old + return this + } + + + /* AFFIX DATA-API + * ============== */ + + $(window).on('load', function () { + $('[data-spy="affix"]').each(function () { + var $spy = $(this) + , data = $spy.data() + + data.offset = data.offset || {} + + data.offsetBottom && (data.offset.bottom = data.offsetBottom) + data.offsetTop && (data.offset.top = data.offsetTop) + + $spy.affix(data) + }) + }) + + +}(window.jQuery);
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