ckeditor spellchecker plugin.js

CKEDITOR.plugins.add('jqueryspellchecker', {

    config: {
        lang: 'en',
        parser: 'html',
        webservice: {
            path: "../SpellChecker.php",
            driver: 'google'
        },
        suggestBox: {
            position: 'below',
            appendTo: 'body'
        }
    },

    init: function( editor ) {

        var t = this;
        var pluginName = 'jqueryspellchecker';

        this.config.suggestBox.position = this.positionSuggestBox();

        editor.addCommand(pluginName, {
            canUndo: false,
            readOnly: 1,
            exec: function() {
                t.toggle(editor);
            }
        });

        editor.ui.addButton('jqueryspellchecker', {
            label: 'SpellCheck',
            command: pluginName,
            toolbar: 'spellchecker,10',
            icon: this.path + 'icon.gif'
        });

        editor.on('saveSnapshot', function() {
            t.destroy();
        });
    },

    create: function() {
        this.editor.setReadOnly(true);
        this.editorWindow = this.editor.document.getWindow().$;

        this.createSpellchecker();
        this.spellchecker.check();

        $(this.editorWindow)
            .on('scroll.spellchecker', $.proxy(function scroll(){
                if (this.spellchecker.suggestBox) {
                    this.spellchecker.suggestBox.close();
                }
            }, this));
    },

    destroy: function() {
        if (!this.spellchecker)
            return;
        this.spellchecker.destroy();
        this.spellchecker = null;
        this.editor.setReadOnly(false);
        $(this.editorWindow).off('.spellchecker');
    },

    toggle: function(editor) {
        this.editor = editor;
        if (!this.spellchecker) {
            this.create();
        } else {
            this.destroy();
        }
    },

    createSpellchecker: function() {
        var t = this;

        t.config.getText = function() {
            return $('<div />').append(t.editor.getData()).text();
        };

        t.spellchecker = new $.SpellChecker(t.editor.document.$.body, this.config);

        t.spellchecker.on('check.success', function() {
            alert('There are no incorrectly spelt words.');
            t.destroy();
        });
        t.spellchecker.on('replace.word', function() {
            if (t.spellchecker.parser.incorrectWords.length === 0) {
                t.destroy();
            }
        });
    },

    positionSuggestBox: function() {

        var t = this;

        return function() {

            var ed = t.editor;
            var word = (this.wordElement.data('firstElement') || this.wordElement)[0];

            var p1 = $(ed.container.$).find('iframe').offset();
            var p2 = $(ed.container.$).offset();
            var p3 = $(word).offset();

            var left = p3.left + p2.left;
            var top = p3.top + p2.top + (p1.top - p2.top) + word.offsetHeight;

            top -= $(t.editorWindow).scrollTop();

            this.container.css({
                top: top,
                left: left
            });
        };
    }
});