docs/tutorial/jquery.sticky-kit.js
author Martin von Zweigbergk <martinvonz@google.com>
Mon, 14 Jan 2019 09:14:38 -0800
changeset 4341 d1aab9d82f5b
parent 3376 aad37ffd7d58
permissions -rw-r--r--
evolve: adapt for deprecated ui.progress() This makes a wrapper that has an interface like ui.progress() even though that's the old interface that will eventually go away. That's because it's a lot easier to convert from the ui.progress() to the ui.makeprogress() interface than the other way around. Once we no longer support hg<4.7, we can migrate our callers to ui.makeprogress() and drop the wrapper.
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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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      if (spacer) {
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        spacer.css('position', elm.css('position'));
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      }
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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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   227
        if (fixed) {
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   228
          if (manual_spacer == null) {
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   229
            if (el_float === "left" || el_float === "right") {
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   230
              elm.insertAfter(spacer);
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   231
            }
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            spacer.remove();
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   233
          }
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   234
          return elm.removeClass(sticky_class);
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   235
        }
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   236
      };
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      win.on("touchmove", tick);
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   238
      win.on("scroll", tick);
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   239
      win.on("resize", recalc_and_tick);
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   240
      $(document.body).on("sticky_kit:recalc", recalc_and_tick);
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   241
      elm.on("sticky_kit:detach", detach);
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   242
      return setTimeout(tick, 0);
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   243
    };
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   244
    for (i = 0, len = this.length; i < len; i++) {
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   245
      elm = this[i];
aad37ffd7d58 doc: import the training support
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   246
      fn($(elm));
aad37ffd7d58 doc: import the training support
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   247
    }
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   248
    return this;
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   249
  };
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   250
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   251
}).call(this);