/*
This file is part of Ext JS 4.2

Copyright (c) 2011-2013 Sencha Inc

Contact:  http://www.sencha.com/contact

Commercial Usage
Licensees holding valid commercial licenses may use this file in accordance with the Commercial
Software License Agreement provided with the Software or, alternatively, in accordance with the
terms contained in a written agreement between you and Sencha.

If you are unsure which license is appropriate for your use, please contact the sales department
at http://www.sencha.com/contact.

Build date: 2013-09-18 17:18:59 (940c324ac822b840618a3a8b2b4b873f83a1a9b1)
*/
/**
 * This class provides a DOM ClassList API to buffer access to an element's class.
 * Instances of this class are created by {@link Ext.layout.ContextItem#getClassList}.
 */
Ext.define('Ext.layout.ClassList', (function () {

    var splitWords = Ext.String.splitWords,
        toMap = Ext.Array.toMap;

    return {
        dirty: false,

        constructor: function (owner) {
            this.owner = owner;
            this.map = toMap(this.classes = splitWords(owner.el.className));
        },

        /**
         * Adds a single class to the class list.
         */
        add: function (cls) {
            var me = this;

            if (!me.map[cls]) {
                me.map[cls] = true;
                me.classes.push(cls);
                if (!me.dirty) {
                    me.dirty = true;
                    me.owner.markDirty();
                }
            }
        },

        /**
         * Adds one or more classes in an array or space-delimited string to the class list.
         */
        addMany: function (classes) {
            Ext.each(splitWords(classes), this.add, this);
        },

        contains: function (cls) {
            return this.map[cls];
        },

        flush: function () {
            this.owner.el.className = this.classes.join(' ');
            this.dirty = false;
        },

        /**
         * Removes a single class from the class list.
         */
        remove: function (cls) {
            var me = this;

            if (me.map[cls]) {
                delete me.map[cls];
                me.classes = Ext.Array.filter(me.classes, function (c) {
                    return c != cls;
                });
                if (!me.dirty) {
                    me.dirty = true;
                    me.owner.markDirty();
                }
            }
        },

        /**
         * Removes one or more classes in an array or space-delimited string from the class
         * list.
         */
        removeMany: function (classes) {
            var me = this,
                remove = toMap(splitWords(classes));

            me.classes = Ext.Array.filter(me.classes, function (c) {
                if (!remove[c]) {
                    return true;
                }

                delete me.map[c];
                if (!me.dirty) {
                    me.dirty = true;
                    me.owner.markDirty();
                }
                return false;
            });
        }
    };
}()));
