/* Enabling support for all tinyMCE versions */
var wrs_int_tinyManager = function () {};

if (!window.tinymce) {
    wrs_int_tinyManager.baseURL = tinyMCE.baseURL;
    wrs_int_tinyManager.addPlugin = function (pluginName, plugin) {
        tinyMCE.addPlugin(pluginName, plugin);
    }
}
else {
    wrs_int_tinyManager.baseURL = tinymce.baseURL;
    wrs_int_tinyManager.addPlugin = function (pluginName, plugin) {
        tinymce.create('tinymce.plugins.' + pluginName, plugin);
        tinymce.PluginManager.add(pluginName, tinymce.plugins[pluginName]);
    }
}

/* Including core.js */
var script = document.createElement('script');
script.type = 'text/javascript';
script.src = wrs_int_tinyManager.baseURL + '/plugins/tiny_mce_wiris/core/core.js';
document.getElementsByTagName('head')[0].appendChild(script);

/* Configuration */
var _wrs_conf_editorEnabled = true;        // Specifies if fomula editor is enabled
var _wrs_conf_CASEnabled = true;        // Specifies if WIRIS CAS is enabled

var _wrs_conf_imageMathmlAttribute = 'alt';    // Specifies the image tag where we should save the formula editor mathml code
var _wrs_conf_CASMathmlAttribute = 'alt';    // Specifies the image tag where we should save the WIRIS CAS mathml code

var _wrs_conf_editorPath = wrs_int_tinyManager.baseURL + '/plugins/tiny_mce_wiris/integration/editor.php';            // Specifies where is the editor HTML code (for popup window)
var _wrs_conf_editorAttributes = 'width=500, height=400, scroll=no, resizable=yes';                                // Specifies formula editor window options
var _wrs_conf_CASPath = wrs_int_tinyManager.baseURL + '/plugins/tiny_mce_wiris/integration/cas.php';                    // Specifies where is the WIRIS CAS HTML code (for popup window)
var _wrs_conf_CASAttributes = 'width=640, height=480, scroll=no, resizable=yes';                                // Specifies WIRIS CAS window options

var _wrs_conf_createimagePath = wrs_int_tinyManager.baseURL + '/plugins/tiny_mce_wiris/integration/createimage.php';            // Specifies where is createimage script
var _wrs_conf_createcasimagePath = wrs_int_tinyManager.baseURL + '/plugins/tiny_mce_wiris/integration/createcasimage.php';    // Specifies where is createcasimage script

/* Vars */
var _wrs_int_editorIcon = wrs_int_tinyManager.baseURL + '/plugins/tiny_mce_wiris/core/wiris-formula.gif';
var _wrs_int_CASIcon = wrs_int_tinyManager.baseURL + '/plugins/tiny_mce_wiris/core/wiris-cas.gif';
var _wrs_int_temporalIframe;
var _wrs_int_window;
var _wrs_int_window_opened = false;
var _wrs_int_temporalImageResizing;

/* Plugin integration */
(function () {
    var plugin = {
        // old versions
        initInstance: function (editor) {
            if (!editor.tiny_mce_wirisApplied) {
                editor.tiny_mce_wirisApplied = true;
                editor.oldTargetElement.value = wrs_initParse(editor.oldTargetElement.value);
                wrs_addIframeEvents(editor.iframeElement, wrs_int_doubleClickHandler, wrs_int_mousedownHandler, wrs_int_mouseupHandler);
            }
        },
    
        // new versions
        init: function (editor, url) {
            var iframe;
            
            editor.onInit.add(function (editor) {
                var textarea = editor.getElement();
                
                function whenDocReady() {
                    if (window.wrs_initParse) {
                        if (textarea.value == undefined) {
                            textarea.value = wrs_initParse(editor.getContent());
                        }
                        else {
                            textarea.value = wrs_initParse(textarea.value);
                        }
                        
                        editor.load();
                        iframe = editor.getContentAreaContainer().firstChild;
                        wrs_addIframeEvents(iframe, wrs_int_doubleClickHandler, wrs_int_mousedownHandler, wrs_int_mouseupHandler);
                    }
                    else {
                        setTimeout(whenDocReady, 50);
                    }
                }
                
                whenDocReady();
            });
            
            editor.onSaveContent.add(function (editor, params) {
                params.content = wrs_endParse(params.content);
            });
            
            if (_wrs_conf_editorEnabled) {
                editor.addCommand('tiny_mce_wiris_openFormulaEditor', function () {
                    wrs_int_openNewFormulaEditor(iframe);
                });
            
                editor.addButton('tiny_mce_wiris_formulaEditor', {
                    title: 'Formula Editor',
                    cmd: 'tiny_mce_wiris_openFormulaEditor',
                    image: url + '/core/wiris-formula.gif'
                });
            }
            
            if (_wrs_conf_CASEnabled) {
                editor.addCommand('tiny_mce_wiris_openCAS', function () {
                    wrs_int_openNewCAS(iframe);
                });
            
                editor.addButton('tiny_mce_wiris_CAS', {
                    title: 'WIRIS CAS',
                    cmd: 'tiny_mce_wiris_openCAS',
                    image: url + '/core/wiris-cas.gif'
                });
            }
        },
        
        // old versions
        getControlHTML: function (buttonName) {
            if (buttonName == 'tiny_mce_wiris_formulaEditor') {
                return tinyMCE.getButtonHTML(buttonName, 'Formula Editor', '{$pluginurl}/core/wiris-formula.gif', 'tiny_mce_wiris_openFormulaEditor');
            }
            
            if (buttonName == 'tiny_mce_wiris_CAS') {
                return tinyMCE.getButtonHTML(buttonName, 'WIRIS CAS', '{$pluginurl}/core/wiris-cas.gif', 'tiny_mce_wiris_openCAS');
            }
            
            return '';
        },
        
        // old versions
        execCommand: function (editor_id, element, command, user_interface, value) {
            if (command == 'tiny_mce_wiris_openFormulaEditor') {
                var iframe = tinyMCE.getInstanceById(editor_id).iframeElement;
                wrs_int_openNewFormulaEditor(iframe);
            }
            else if (command == 'tiny_mce_wiris_openCAS') {
                var iframe = tinyMCE.getInstanceById(editor_id).iframeElement;
                wrs_int_openNewCAS(iframe);
            }
        },
        
        cleanup : function(type, content, editor) {
            if (type == 'insert_to_editor') {
                return wrs_initParse(editor.startContent);
            }
            
            if (type == 'submit_content') {
                return wrs_endParse(content);
            }
            
            return content;
        },


        // all versions
        getInfo: function () {
            return {
                longname : 'tiny_mce_wiris',
                author : 'Juan Lao Tebar - Maths for More',
                authorurl : 'http://www.wiris.com',
                infourl : 'http://www.mathsformore.com',
                version : '1.0'
            };
        }    
    };

    wrs_int_tinyManager.addPlugin('tiny_mce_wiris', plugin);
})();

/**
 * Opens formula editor.
 * @param object iframe Target
 */
function wrs_int_openNewFormulaEditor(iframe) {
    if (_wrs_int_window_opened) {
        _wrs_int_window.focus();
    }
    else {
        _wrs_int_window_opened = _wrs_isNewElement = true;
        _wrs_int_temporalIframe = iframe;
        _wrs_int_window = window.open(_wrs_conf_editorPath, 'WIRISFormulaEditor', _wrs_conf_editorAttributes);
    }
}

/**
 * Opens CAS.
 * @param object iframe Target
 */
function wrs_int_openNewCAS(iframe) {
    if (_wrs_int_window_opened) {
        _wrs_int_window.focus();
    }
    else {
        _wrs_int_window_opened = _wrs_isNewElement = true;
        _wrs_int_temporalIframe = iframe;
        _wrs_int_window = window.open(_wrs_conf_CASPath, 'WIRISCAS', _wrs_conf_CASAttributes);
    }
}

/**
 * Handles a double click on the iframe.
 * @param object iframe Target
 * @param object element Element double clicked
 */
function wrs_int_doubleClickHandler(iframe, element) {
    if (element.nodeName.toLowerCase() == 'img') {
        if (wrs_containsClass(element, 'Wirisformula')) {
            if (!_wrs_int_window_opened) {
                _wrs_temporalImage = element;
                wrs_int_openExistingFormulaEditor(iframe);
            }
            else {
                _wrs_int_window.focus();
            }
        }
        else if (wrs_containsClass(element, 'Wiriscas')) {
            if (!_wrs_int_window_opened) {
                _wrs_temporalImage = element;
                wrs_int_openExistingCAS(iframe);
            }
            else {
                _wrs_int_window.focus();
            }
        }
    }
}

/**
 * Opens formula editor to edit an existing formula.
 * @param object iframe Target
 */
function wrs_int_openExistingFormulaEditor(iframe) {
    _wrs_int_window_opened = true;
    _wrs_isNewElement = false;
    _wrs_int_temporalIframe = iframe;
    _wrs_int_window = window.open(_wrs_conf_editorPath, 'WIRISFormulaEditor', _wrs_conf_editorAttributes);
}

/**
 * Opens CAS to edit an existing formula.
 * @param object iframe Target
 */
function wrs_int_openExistingCAS(iframe) {
    _wrs_int_window_opened = true;
    _wrs_isNewElement = false;
    _wrs_int_temporalIframe = iframe;
    _wrs_int_window = window.open(_wrs_conf_CASPath, 'WIRISCAS', _wrs_conf_CASAttributes);
}

/**
 * Handles a mouse down event on the iframe.
 * @param object iframe Target
 * @param object element Element mouse downed
 */
function wrs_int_mousedownHandler(iframe, element) {
    if (element.nodeName.toLowerCase() == 'img') {
        if (wrs_containsClass(element, 'Wirisformula') || wrs_containsClass(element, 'Wiriscas')) {
            _wrs_int_temporalImageResizing = element;
        }
    }
}

/**
 * Handles a mouse up event on the iframe.
 */
function wrs_int_mouseupHandler() {
    if (_wrs_int_temporalImageResizing) {
        setTimeout(function () {
            _wrs_int_temporalImageResizing.removeAttribute('style');
            _wrs_int_temporalImageResizing.removeAttribute('width');
            _wrs_int_temporalImageResizing.removeAttribute('height');
        }, 10);
    }
}

/**
 * Calls wrs_updateFormula with well params.
 * @param string mathml
 */
function wrs_int_updateFormula(mathml) {
    wrs_updateFormula(_wrs_int_temporalIframe, mathml);
}

/**
 * Calls wrs_updateCAS with well params.
 * @param string appletCode
 * @param string image
 * @param int width
 * @param int height
 */
function wrs_int_updateCAS(appletCode, image, width, height) {
    wrs_updateCAS(_wrs_int_temporalIframe, appletCode, image, width, height);
}

/**
 * Handles window closing.
 */
function wrs_int_notifyWindowClosed() {
    _wrs_int_window_opened = false;
}