// Generated by CoffeeScript 1.9.1

/**
@license Relatively-Sticky v2.0.0 | WTFPL | Tobias Bengfort 2015
 */

(function() {
  var $, top, win;

  $ = this.jQuery || window.jQuery;

  win = $(window);

  top = function(element, context) {
    if (context === document) {
      if (element === document) {
        return 0;
      } else if (element === win) {
        return win.scrollTop();
      } else {
        return element.offset().top;
      }
    } else {
      return top(element, document) - top(context, document);
    }
  };

  $.fn.stick_in_parent = function(opts) {
    var elm, enable_bottoming, fn, i, len, offset_top, parent_selector, scrollable_selector, sticky_class;
    if (opts == null) {
      opts = {};
    }
    sticky_class = opts.sticky_class, parent_selector = opts.parent, scrollable_selector = opts.scrollable, offset_top = opts.offset_top, enable_bottoming = opts.bottoming;
    if (offset_top == null) {
      offset_top = 0;
    }
    if (parent_selector == null) {
      parent_selector = void 0;
    }
    if (sticky_class == null) {
      sticky_class = "is_stuck";
    }
    if (enable_bottoming == null) {
      enable_bottoming = true;
    }
    fn = function(elm, detached, fixed, bottomed) {
      var _top, detach, get_max, parent, scrollable, tick;
      if (elm.data("sticky_kit")) {
        return;
      }
      elm.data("sticky_kit", true);
      scrollable = win;
      if (scrollable_selector != null) {
        scrollable = elm.parent().closest(scrollable_selector);
      }
      if (!scrollable.length) {
        throw "failed to find stick scrollable";
      }
      parent = elm.parent();
      if (parent_selector != null) {
        parent = parent.closest(parent_selector);
      }
      if (!parent.length) {
        throw "failed to find stick parent";
      }
      _top = 0;
      elm.css("position", "relative");
      get_max = function() {
        var border_bottom, margin_top, padding_bottom;
        padding_bottom = parseInt(parent.css("padding-bottom"), 10);
        border_bottom = parseInt(parent.css("border-bottom-width"), 10);
        margin_top = parseInt(elm.css("margin-top"), 10);
        return parent.outerHeight() - (elm.outerHeight(true) - margin_top) - padding_bottom - border_bottom;
      };
      tick = function() {
        var bottomed_old, fixed_old, margin_top, max, original_top;
        if (detached) {
          return;
        }
        fixed_old = fixed;
        bottomed_old = bottomed;
        margin_top = parseInt(elm.css("margin-top"), 10);
        original_top = top(elm, parent) - _top;
        _top = top(scrollable, parent) + offset_top + margin_top;
        if (enable_bottoming) {
          max = get_max();
          if (bottomed = _top >= max) {
            _top = max;
          }
        }
        _top = Math.max(_top - original_top, 0);
        elm.css("top", _top);
        if ((fixed = _top !== 0)) {
          elm.addClass(sticky_class);
        } else {
          elm.removeClass(sticky_class);
        }
        if (!fixed && fixed_old) {
          elm.trigger("sticky_kit:unstick");
        }
        if (!bottomed && bottomed_old) {
          elm.trigger("sticky_kit:unbottom");
        }
        if (fixed && !fixed_old) {
          return elm.trigger("sticky_kit:stick");
        } else if (bottomed && !bottomed_old) {
          return elm.trigger("sticky_kit:bottom");
        }
      };
      detach = function() {
        detached = true;
        win.off("touchmove", tick);
        win.off("scroll", tick);
        win.off("resize", tick);
        if (scrollable_selector) {
          scrollable.off("touchmove", tick);
          scrollable.off("scroll", tick);
          elm.parentsUntil(scrollable).off("touchmove", tick);
          elm.parentsUntil(scrollable).off("scroll", tick);
        }
        $(document.body).off("sticky_kit:recalc", tick);
        elm.off("sticky_kit:detach", detach);
        elm.removeData("sticky_kit");
        elm.css({
          position: "",
          top: ""
        });
        if (fixed) {
          return elm.removeClass(sticky_class);
        }
      };
      win.on("touchmove", tick);
      win.on("scroll", tick);
      win.on("resize", tick);
      if (scrollable_selector) {
        scrollable.on("touchmove", tick);
        scrollable.on("scroll", tick);
        elm.parentsUntil(scrollable).on("touchmove", tick);
        elm.parentsUntil(scrollable).on("scroll", tick);
      }
      $(document.body).on("sticky_kit:recalc", tick);
      elm.on("sticky_kit:detach", detach);
      return setTimeout(tick, 0);
    };
    for (i = 0, len = this.length; i < len; i++) {
      elm = this[i];
      fn($(elm));
    }
    return this;
  };

}).call(this);