jquery.mintree.js

/*jslint vars: true, unparam: true, white: true */
/*global jQuery */

jQuery.fn.mintree = (function($) {

  "use strict";

  function MinTree(root, options) {
    this.options = $.extend({}, options);
    var el = $(root).addClass("mintree"),
    self = this;
    $("li ul, li ol", root).closest("li").each(function(i, node) {
      self.injectToggle(node);
    });
    el.on("click", "a.toggle", this.onToggle);
  }
  MinTree.prototype = {
    onToggle: function(ev) { // TODO: option to exclude individual lists
      $(this).closest("li").children("ul, ol").toggle(); // XXX: use of `children` disallows wrappers
      var toggler = $(this).text() == "▹" ? "▿" : "▹";
      $(this).text(toggler);
    },
    injectToggle: function(node) { // TODO: option to exclude individual lists
      $('<a href="javascript:;" class="toggle" />').
	text("▿").
	prependTo(node);
    }
  };

  return function(options) {
    this.each(function(i, node) {
      new MinTree(node, options);
    });
    return this;
  }; // TODO: expose internal functions?

}(jQuery));