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Diffstat (limited to 'vendor')
| -rw-r--r-- | vendor/assets/javascripts/jquery.endless-scroll.js | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/vendor/assets/javascripts/jquery.endless-scroll.js b/vendor/assets/javascripts/jquery.endless-scroll.js new file mode 100644 index 0000000..38db6b0 --- /dev/null +++ b/vendor/assets/javascripts/jquery.endless-scroll.js @@ -0,0 +1,128 @@ +/** + * Endless Scroll plugin for jQuery + * + * v1.4.8 + * + * Copyright (c) 2008 Fred Wu + * + * Dual licensed under the MIT and GPL licenses: + * http://www.opensource.org/licenses/mit-license.php + * http://www.gnu.org/licenses/gpl.html + */ + +/** + * Usage: + * + * // using default options + * $(document).endlessScroll(); + * + * // using some custom options + * $(document).endlessScroll({ + * fireOnce: false, + * fireDelay: false, + * loader: "<div class=\"loading\"><div>", + * callback: function(){ + * alert("test"); + * } + * }); + * + * Configuration options: + * + * bottomPixels integer the number of pixels from the bottom of the page that triggers the event + * fireOnce boolean only fire once until the execution of the current event is completed + * fireDelay integer delay the subsequent firing, in milliseconds, 0 or false to disable delay + * loader string the HTML to be displayed during loading + * data string|function plain HTML data, can be either a string or a function that returns a string, + * when passed as a function it accepts one argument: fire sequence (the number + * of times the event triggered during the current page session) + * insertAfter string jQuery selector syntax: where to put the loader as well as the plain HTML data + * callback function callback function, accepts one argument: fire sequence (the number of times + * the event triggered during the current page session) + * resetCounter function resets the fire sequence counter if the function returns true, this function + * could also perform hook actions since it is applied at the start of the event + * ceaseFire function stops the event (no more endless scrolling) if the function returns true + * + * Usage tips: + * + * The plugin is more useful when used with the callback function, which can then make AJAX calls to retrieve content. + * The fire sequence argument (for the callback function) is useful for 'pagination'-like features. + */ + +(function($){ + + $.fn.endlessScroll = function(options) { + + var defaults = { + bottomPixels : 50, + fireOnce : true, + fireDelay : 150, + loader : "<br />Loading...<br />", + data : "", + insertAfter : "div:last", + resetCounter : function() { return false; }, + callback : function() { return true; }, + ceaseFire : function() { return false; } + }; + + var options = $.extend({}, defaults, options), + firing = true, + fired = false, + fireSequence = 0, + is_scrollable; + + if (options.ceaseFire.apply(this) === true) + firing = false; + + if (firing === true) { + $(this).scroll(function() { + if (options.ceaseFire.apply(this) === true) { + firing = false; + return; // Scroll will still get called, but nothing will happen + } + + if (this == document || this == window) { + is_scrollable = $(document).height() - $(window).height() <= $(window).scrollTop() + options.bottomPixels; + } else { + // calculates the actual height of the scrolling container + var inner_wrap = $(".endless_scroll_inner_wrap", this); + if (inner_wrap.length == 0) + inner_wrap = $(this).wrapInner("<div class=\"endless_scroll_inner_wrap\" />").find(".endless_scroll_inner_wrap"); + is_scrollable = inner_wrap.length > 0 && + (inner_wrap.height() - $(this).height() <= $(this).scrollTop() + options.bottomPixels); + } + + if (is_scrollable && (options.fireOnce == false || (options.fireOnce == true && fired != true))) { + if (options.resetCounter.apply(this) === true) fireSequence = 0; + + fired = true; + fireSequence++; + + $(options.insertAfter).after("<div id=\"endless_scroll_loader\">" + options.loader + "</div>"); + + data = typeof options.data == 'function' ? options.data.apply(this, [fireSequence]) : options.data; + + if (data !== false) { + $(options.insertAfter).after("<div id=\"endless_scroll_data\">" + data + "</div>"); + $("#endless_scroll_data").hide().fadeIn(250, function() {$(this).removeAttr("id");}); + + options.callback.apply(this, [fireSequence]); + + if (options.fireDelay !== false || options.fireDelay !== 0) { + $("body").after("<div id=\"endless_scroll_marker\"></div>"); + // slight delay for preventing event firing twice + $("#endless_scroll_marker").fadeTo(options.fireDelay, 1, function() { + $(this).remove(); + fired = false; + }); + } + else + fired = false; + } + + $("#endless_scroll_loader").remove(); + } + }); + } + }; + +})(jQuery);
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