/**
@module tree
@submodule tree-openable
**/
 
/**
`Tree.Node` extension that adds methods useful for nodes in trees that use the
`Tree.Openable` extension.
 
@class Tree.Node.Openable
@constructor
@extensionfor Tree.Node
**/
 
function NodeOpenable() {}
 
NodeOpenable.prototype = {
    /**
    Closes this node if it's currently open.
 
    @method close
    @param {Object} [options] Options.
        @param {Boolean} [options.silent=false] If `true`, the `close` event
            will be suppressed.
        @param {String} [options.src] Source of the change, to be passed along
            to the event facade of the resulting event. This can be used to
            distinguish between changes triggered by a user and changes
            triggered programmatically, for example.
    @chainable
    **/
    close: function (options) {
        this.tree.closeNode(this, options);
        return this;
    },
 
    /**
    Returns `true` if this node is currently open.
 
    Note: the root node of a tree is always considered to be open.
 
    @method isOpen
    @return {Boolean} `true` if this node is currently open, `false` otherwise.
    **/
    isOpen: function () {
        return !!this.state.open || this.isRoot();
    },
 
    /**
    Opens this node if it's currently closed.
 
    @method open
    @param {Object} [options] Options.
        @param {Boolean} [options.silent=false] If `true`, the `open` event
            will be suppressed.
        @param {String} [options.src] Source of the change, to be passed along
            to the event facade of the resulting event. This can be used to
            distinguish between changes triggered by a user and changes
            triggered programmatically, for example.
    @chainable
    **/
    open: function (options) {
        this.tree.openNode(this, options);
        return this;
    },
 
    /**
    Toggles the open/closed state of this node, closing it if it's currently
    open or opening it if it's currently closed.
 
    @method toggleOpen
    @param {Object} [options] Options.
        @param {Boolean} [options.silent=false] If `true`, events will be
            suppressed.
        @param {String} [options.src] Source of the change, to be passed along
            to the event facade of the resulting event. This can be used to
            distinguish between changes triggered by a user and changes
            triggered programmatically, for example.
    @chainable
    **/
    toggleOpen: function (options) {
        this.tree.toggleOpenNode(this, options);
        return this;
    }
};
 
Y.Tree.Node.Openable = NodeOpenable;