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Diffstat (limited to 'library/sticky-kit/sticky-kit.js')
| -rw-r--r-- | library/sticky-kit/sticky-kit.js | 265 |
1 files changed, 265 insertions, 0 deletions
diff --git a/library/sticky-kit/sticky-kit.js b/library/sticky-kit/sticky-kit.js new file mode 100644 index 000000000..eb2ea8a26 --- /dev/null +++ b/library/sticky-kit/sticky-kit.js @@ -0,0 +1,265 @@ +// Generated by CoffeeScript 1.10.0 + +/** +@license Sticky-kit v1.1.3 | MIT | Leaf Corcoran 2015 | http://leafo.net + */ + +(function() { + var $, win; + + $ = window.jQuery; + + win = $(window); + + $.fn.stick_in_parent = function(opts) { + var doc, elm, enable_bottoming, fn, i, inner_scrolling, len, manual_spacer, offset_top, outer_width, parent_selector, recalc_every, sticky_class; + if (opts == null) { + opts = {}; + } + sticky_class = opts.sticky_class, inner_scrolling = opts.inner_scrolling, recalc_every = opts.recalc_every, parent_selector = opts.parent, offset_top = opts.offset_top, manual_spacer = opts.spacer, enable_bottoming = opts.bottoming; + if (offset_top == null) { + offset_top = 0; + } + if (parent_selector == null) { + parent_selector = void 0; + } + if (inner_scrolling == null) { + inner_scrolling = true; + } + if (sticky_class == null) { + sticky_class = "is_stuck"; + } + doc = $(document); + if (enable_bottoming == null) { + enable_bottoming = true; + } + outer_width = function(el) { + var _el, computed, w; + if (window.getComputedStyle) { + _el = el[0]; + computed = window.getComputedStyle(el[0]); + w = parseFloat(computed.getPropertyValue("width")) + parseFloat(computed.getPropertyValue("margin-left")) + parseFloat(computed.getPropertyValue("margin-right")); + if (computed.getPropertyValue("box-sizing") !== "border-box") { + w += parseFloat(computed.getPropertyValue("border-left-width")) + parseFloat(computed.getPropertyValue("border-right-width")) + parseFloat(computed.getPropertyValue("padding-left")) + parseFloat(computed.getPropertyValue("padding-right")); + } + return w; + } else { + return el.outerWidth(true); + } + }; + fn = function(elm, padding_bottom, parent_top, parent_height, top, height, el_float, detached) { + var bottomed, detach, fixed, last_pos, last_scroll_height, offset, parent, recalc, recalc_and_tick, recalc_counter, spacer, tick; + if (elm.data("sticky_kit")) { + return; + } + elm.data("sticky_kit", true); + last_scroll_height = doc.height(); + parent = elm.parent(); + if (parent_selector != null) { + parent = parent.closest(parent_selector); + } + if (!parent.length) { + throw "failed to find stick parent"; + } + fixed = false; + bottomed = false; + spacer = manual_spacer != null ? manual_spacer && elm.closest(manual_spacer) : $("<div />"); + if (spacer) { + spacer.css('position', elm.css('position')); + } + recalc = function() { + var border_top, padding_top, restore; + if (detached) { + return; + } + last_scroll_height = doc.height(); + border_top = parseInt(parent.css("border-top-width"), 10); + padding_top = parseInt(parent.css("padding-top"), 10); + padding_bottom = parseInt(parent.css("padding-bottom"), 10); + parent_top = parent.offset().top + border_top + padding_top; + parent_height = parent.outerHeight(true); + if (fixed) { + fixed = false; + bottomed = false; + if (manual_spacer == null) { + elm.insertAfter(spacer); + spacer.detach(); + } + elm.css({ + position: "", + top: "", + width: "", + bottom: "" + }).removeClass(sticky_class); + restore = true; + } + top = elm.offset().top - (parseInt(elm.css("margin-top"), 10) || 0) - offset_top; + height = elm.outerHeight(true); + el_float = elm.css("float"); + if (spacer) { + spacer.css({ + width: outer_width(elm), + height: height, + display: elm.css("display"), + "vertical-align": elm.css("vertical-align"), + "float": el_float + }); + } + if (restore) { + return tick(); + } + }; + recalc(); + if (height === parent_height) { + return; + } + last_pos = void 0; + offset = offset_top; + recalc_counter = recalc_every; + tick = function() { + var css, delta, recalced, scroll, will_bottom, win_height; + if (detached) { + return; + } + recalced = false; + if (recalc_counter != null) { + recalc_counter -= 1; + if (recalc_counter <= 0) { + recalc_counter = recalc_every; + recalc(); + recalced = true; + } + } + if (!recalced && doc.height() !== last_scroll_height) { + recalc(); + recalced = true; + } + scroll = win.scrollTop(); + if (last_pos != null) { + delta = scroll - last_pos; + } + last_pos = scroll; + if (fixed) { + if (enable_bottoming) { + will_bottom = scroll + height + offset > parent_height + parent_top; + if (bottomed && !will_bottom) { + bottomed = false; + elm.css({ + position: "fixed", + bottom: "", + top: offset + }).trigger("sticky_kit:unbottom"); + } + } + if (scroll < top) { + fixed = false; + offset = offset_top; + if (manual_spacer == null) { + if (el_float === "left" || el_float === "right") { + elm.insertAfter(spacer); + } + spacer.detach(); + } + css = { + position: "", + width: "", + top: "" + }; + elm.css(css).removeClass(sticky_class).trigger("sticky_kit:unstick"); + } + if (inner_scrolling) { + win_height = win.height(); + if (height + offset_top > win_height) { + if (!bottomed) { + offset -= delta; + offset = Math.max(win_height - height, offset); + offset = Math.min(offset_top, offset); + if (fixed) { + elm.css({ + top: offset + "px" + }); + } + } + } + } + } else { + if (scroll > top) { + fixed = true; + css = { + position: "fixed", + top: offset + }; + css.width = elm.css("box-sizing") === "border-box" ? elm.outerWidth() + "px" : elm.width() + "px"; + elm.css(css).addClass(sticky_class); + if (manual_spacer == null) { + elm.after(spacer); + if (el_float === "left" || el_float === "right") { + spacer.append(elm); + } + } + elm.trigger("sticky_kit:stick"); + } + } + if (fixed && enable_bottoming) { + if (will_bottom == null) { + will_bottom = scroll + height + offset > parent_height + parent_top; + } + if (!bottomed && will_bottom) { + bottomed = true; + if (parent.css("position") === "static") { + parent.css({ + position: "relative" + }); + } + return elm.css({ + position: "absolute", + bottom: padding_bottom, + top: "auto" + }).trigger("sticky_kit:bottom"); + } + } + }; + recalc_and_tick = function() { + recalc(); + return tick(); + }; + detach = function() { + detached = true; + win.off("touchmove", tick); + win.off("scroll", tick); + win.off("resize", recalc_and_tick); + $(document.body).off("sticky_kit:recalc", recalc_and_tick); + elm.off("sticky_kit:detach", detach); + elm.removeData("sticky_kit"); + elm.css({ + position: "", + bottom: "", + top: "", + width: "" + }); + parent.position("position", ""); + if (fixed) { + if (manual_spacer == null) { + if (el_float === "left" || el_float === "right") { + elm.insertAfter(spacer); + } + spacer.remove(); + } + return elm.removeClass(sticky_class); + } + }; + win.on("touchmove", tick); + win.on("scroll", tick); + win.on("resize", recalc_and_tick); + $(document.body).on("sticky_kit:recalc", recalc_and_tick); + elm.on("sticky_kit:detach", detach); + return setTimeout(tick, 0); + }; + for (i = 0, len = this.length; i < len; i++) { + elm = this[i]; + fn($(elm)); + } + return this; + }; + +}).call(this); |