249 lines
7.8 KiB
JavaScript
249 lines
7.8 KiB
JavaScript
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// Generated by CoffeeScript 1.9.2
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/**
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@license Sticky-kit v1.1.2 | WTFPL | Leaf Corcoran 2015 | http://leafo.net
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*/
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(function() {
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var $, win;
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$ = this.jQuery || window.jQuery;
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win = $(window);
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$.fn.stick_in_parent = function(opts) {
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var doc, elm, enable_bottoming, fn, i, inner_scrolling, len, manual_spacer, offset_top, parent_selector, recalc_every, sticky_class;
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if (opts == null) {
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opts = {};
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}
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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;
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if (offset_top == null) {
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offset_top = 0;
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}
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if (parent_selector == null) {
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parent_selector = void 0;
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}
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if (inner_scrolling == null) {
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inner_scrolling = true;
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}
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if (sticky_class == null) {
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sticky_class = "is_stuck";
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}
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doc = $(document);
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if (enable_bottoming == null) {
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enable_bottoming = true;
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}
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fn = function(elm, padding_bottom, parent_top, parent_height, top, height, el_float, detached) {
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var bottomed, detach, fixed, last_pos, last_scroll_height, offset, parent, recalc, recalc_and_tick, recalc_counter, spacer, tick;
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if (elm.data("sticky_kit")) {
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return;
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}
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elm.data("sticky_kit", true);
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last_scroll_height = doc.height();
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parent = elm.parent();
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if (parent_selector != null) {
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parent = parent.closest(parent_selector);
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}
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if (!parent.length) {
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throw "failed to find stick parent";
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}
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fixed = false;
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bottomed = false;
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spacer = manual_spacer != null ? manual_spacer && elm.closest(manual_spacer) : $("<div />");
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recalc = function() {
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var border_top, padding_top, restore;
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if (detached) {
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return;
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}
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last_scroll_height = doc.height();
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border_top = parseInt(parent.css("border-top-width"), 10);
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padding_top = parseInt(parent.css("padding-top"), 10);
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padding_bottom = parseInt(parent.css("padding-bottom"), 10);
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parent_top = parent.offset().top + border_top + padding_top;
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parent_height = parent.height();
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if (fixed) {
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fixed = false;
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bottomed = false;
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if (manual_spacer == null) {
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elm.insertAfter(spacer);
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spacer.detach();
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}
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elm.css({
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position: "",
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top: "",
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width: "",
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bottom: ""
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}).removeClass(sticky_class);
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restore = true;
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}
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top = elm.offset().top - (parseInt(elm.css("margin-top"), 10) || 0) - offset_top;
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height = elm.outerHeight(true);
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el_float = elm.css("float");
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if (spacer) {
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spacer.css({
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width: elm.outerWidth(true),
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height: height,
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display: elm.css("display"),
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"vertical-align": elm.css("vertical-align"),
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"float": el_float
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});
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}
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if (restore) {
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return tick();
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}
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};
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recalc();
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if (height === parent_height) {
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return;
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}
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last_pos = void 0;
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offset = offset_top;
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recalc_counter = recalc_every;
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tick = function() {
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var css, delta, recalced, scroll, will_bottom, win_height;
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if (detached) {
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return;
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}
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recalced = false;
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if (recalc_counter != null) {
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recalc_counter -= 1;
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if (recalc_counter <= 0) {
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recalc_counter = recalc_every;
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recalc();
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recalced = true;
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}
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}
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if (!recalced && doc.height() !== last_scroll_height) {
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recalc();
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recalced = true;
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}
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scroll = win.scrollTop();
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if (last_pos != null) {
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delta = scroll - last_pos;
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}
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last_pos = scroll;
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if (fixed) {
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if (enable_bottoming) {
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will_bottom = scroll + height + offset > parent_height + parent_top;
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if (bottomed && !will_bottom) {
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bottomed = false;
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elm.css({
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position: "fixed",
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bottom: "",
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top: offset
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}).trigger("sticky_kit:unbottom");
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}
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}
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if (scroll < top) {
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fixed = false;
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offset = offset_top;
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if (manual_spacer == null) {
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if (el_float === "left" || el_float === "right") {
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elm.insertAfter(spacer);
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}
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spacer.detach();
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}
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css = {
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position: "",
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width: "",
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top: ""
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};
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elm.css(css).removeClass(sticky_class).trigger("sticky_kit:unstick");
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}
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if (inner_scrolling) {
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win_height = win.height();
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if (height + offset_top > win_height) {
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if (!bottomed) {
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offset -= delta;
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offset = Math.max(win_height - height, offset);
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offset = Math.min(offset_top, offset);
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if (fixed) {
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elm.css({
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top: offset + "px"
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});
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}
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}
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}
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}
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} else {
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if (scroll > top) {
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fixed = true;
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css = {
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position: "fixed",
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top: offset
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};
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css.width = elm.css("box-sizing") === "border-box" ? elm.outerWidth() + "px" : elm.width() + "px";
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elm.css(css).addClass(sticky_class);
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if (manual_spacer == null) {
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elm.after(spacer);
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if (el_float === "left" || el_float === "right") {
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spacer.append(elm);
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}
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}
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elm.trigger("sticky_kit:stick");
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}
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}
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if (fixed && enable_bottoming) {
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if (will_bottom == null) {
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will_bottom = scroll + height + offset > parent_height + parent_top;
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}
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if (!bottomed && will_bottom) {
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bottomed = true;
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if (parent.css("position") === "static") {
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parent.css({
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position: "relative"
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});
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}
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return elm.css({
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position: "absolute",
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bottom: padding_bottom,
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top: "auto"
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}).trigger("sticky_kit:bottom");
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}
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}
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};
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recalc_and_tick = function() {
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recalc();
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return tick();
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};
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detach = function() {
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detached = true;
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win.off("touchmove", tick);
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win.off("scroll", tick);
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win.off("resize", recalc_and_tick);
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$(document.body).off("sticky_kit:recalc", recalc_and_tick);
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elm.off("sticky_kit:detach", detach);
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elm.removeData("sticky_kit");
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elm.css({
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position: "",
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bottom: "",
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top: "",
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width: ""
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});
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parent.position("position", "");
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if (fixed) {
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if (manual_spacer == null) {
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if (el_float === "left" || el_float === "right") {
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elm.insertAfter(spacer);
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}
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spacer.remove();
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}
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return elm.removeClass(sticky_class);
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}
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};
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win.on("touchmove", tick);
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win.on("scroll", tick);
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win.on("resize", recalc_and_tick);
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$(document.body).on("sticky_kit:recalc", recalc_and_tick);
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elm.on("sticky_kit:detach", detach);
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return setTimeout(tick, 0);
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};
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for (i = 0, len = this.length; i < len; i++) {
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elm = this[i];
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fn($(elm));
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}
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return this;
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};
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}).call(this);
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