/**
 * editor_plugin_src.js
 *
 * Copyright 2009, Moxiecode Systems AB
 * Released under LGPL License.
 *
 * License: http://tinymce.moxiecode.com/license
 * Contributing: http://tinymce.moxiecode.com/contributing
 */

(function() {
    tinymce.create('tinymce.plugins.WordCount', {
        block : 0,
        id : null,
        countre : null,
        cleanre : null,

        init : function(ed, url) {
            var t = this, last = 0, VK = tinymce.VK;

            t.countre = ed.getParam('wordcount_countregex', /[\w\u2019\'-]+/g); // u2019 == &rsquo;
            t.cleanre = ed.getParam('wordcount_cleanregex', /[0-9.(),;:!?%#$?\'\"_+=\\\/-]*/g);
            t.update_rate = ed.getParam('wordcount_update_rate', 2000);
            t.update_on_delete = ed.getParam('wordcount_update_on_delete', false);
            t.id = ed.id + '-word-count';

            ed.onPostRender.add(function(ed, cm) {
                var row, id;

                // Add it to the specified id or the theme advanced path
                id = ed.getParam('wordcount_target_id');
                if (!id) {
                    row = tinymce.DOM.get(ed.id + '_path_row');

                    if (row)
                        tinymce.DOM.add(row.parentNode, 'div', {'style': 'float: right'}, ed.getLang('wordcount.words', 'Words: ') + '<span id="' + t.id + '">0</span>');
                } else {
                    tinymce.DOM.add(id, 'span', {}, '<span id="' + t.id + '">0</span>');
                }
            });

            ed.onInit.add(function(ed) {
                ed.selection.onSetContent.add(function() {
                    t._count(ed);
                });

                t._count(ed);
            });

            ed.onSetContent.add(function(ed) {
                t._count(ed);
            });

            function checkKeys(key) {
                return key !== last && (key === VK.ENTER || last === VK.SPACEBAR || checkDelOrBksp(last));
            }

            function checkDelOrBksp(key) {
                return key === VK.DELETE || key === VK.BACKSPACE;
            }

            ed.onKeyUp.add(function(ed, e) {
                if (checkKeys(e.keyCode) || t.update_on_delete && checkDelOrBksp(e.keyCode)) {
                    t._count(ed);
                }

                last = e.keyCode;
            });
        },

        _getCount : function(ed) {
            var tc = 0;
            var tx = ed.getContent({ format: 'raw' });

            if (tx) {
                    tx = tx.replace(/\.\.\./g, ' '); // convert ellipses to spaces
                    tx = tx.replace(/<.[^<>]*?>/g, ' ').replace(/&nbsp;|&#160;/gi, ' '); // remove html tags and space chars

                    // deal with html entities
                    tx = tx.replace(/(\w+)(&.+?;)+(\w+)/, "$1$3").replace(/&.+?;/g, ' ');
                    tx = tx.replace(this.cleanre, ''); // remove numbers and punctuation

                    var wordArray = tx.match(this.countre);
                    if (wordArray) {
                            tc = wordArray.length;
                    }
            }

            return tc;
        },

        _count : function(ed) {
            var t = this;

            // Keep multiple calls from happening at the same time
            if (t.block)
                return;

            t.block = 1;

            setTimeout(function() {
                if (!ed.destroyed) {
                    var tc = t._getCount(ed);
                    tinymce.DOM.setHTML(t.id, tc.toString());
                    setTimeout(function() {t.block = 0;}, t.update_rate);
                }
            }, 1);
        },

        getInfo: function() {
            return {
                longname : 'Word Count plugin',
                author : 'Moxiecode Systems AB',
                authorurl : 'http://tinymce.moxiecode.com',
                infourl : 'http://wiki.moxiecode.com/index.php/TinyMCE:Plugins/wordcount',
                version : tinymce.majorVersion + "." + tinymce.minorVersion
            };
        }
    });

    tinymce.PluginManager.add('wordcount', tinymce.plugins.WordCount);
})();
