[SSE] Formula wizard: show help

apps/spreadsheeteditor/main/app/controller/FormulaDialog.js

@@ -240,6 +240,7 @@ define([
 
                 (new SSE.Views.FormulaWizard({
                     api     : this.api,
+                    lang    : this.appOptions.lang,
                     funcprops: funcprops,
                     props   : props,
                     handler : function(dlg, result, settings) {

apps/spreadsheeteditor/main/app/view/FormulaWizard.js

@@ -82,9 +82,12 @@ define([
             this.props = this.options.props;
             this.funcprops = this.options.funcprops;
             this.api = this.options.api;
+            this.lang = this.options.lang;
+
             this._noApply = false;
             this.args = [];
             this.repeatedArg = undefined;
+            this.helpUrl = undefined;
             this.minArgCount = 1;
             this.maxArgCount = 1;
 
@@ -138,8 +141,7 @@ define([
                 props.name ? $('#formula-wizard-name').html('<b>' + this.textFunction + ': </b>' + props.name) : $('#formula-wizard-name').addClass('hidden');
 
                 this.$window.find('#formula-wizard-help').on('click', function (e) {
-                    // me.close();
+                    me.showHelp();
-                    SSE.getController('LeftMenu').getView('LeftMenu').showMenu('file:help', 'Functions\/' + me.funcprops.origin.toLocaleLowerCase() + '.htm');
                 })
             }
             var height = this.panelDesc.outerHeight();
@@ -313,6 +315,37 @@ define([
             }
         },
 
+        showHelp: function() {
+            if (this.helpUrl==undefined) {
+                if (!this.funcprops || !this.funcprops.origin) {
+                    this.helpUrl = null;
+                    return;
+                }
+                var me = this,
+                    lang = (this.lang) ? this.lang.split(/[\-\_]/)[0] : 'en',
+                    url = 'resources/help/' + lang + '/Functions/' + (this.funcprops.origin.toLocaleLowerCase()) + '.htm';
+
+                fetch(url).then(function(response){
+                    if ( response.ok ) {
+                        me.helpUrl = url;
+                        me.showHelp();
+                    } else {
+                        url = 'resources/help/en/Functions/' + (me.funcprops.origin.toLocaleLowerCase()) + '.htm';
+                        fetch(url).then(function(response){
+                            if ( response.ok ) {
+                                me.helpUrl = url;
+                                me.showHelp();
+                            } else {
+                                me.helpUrl = null;
+                            }
+                        });
+                    }
+                });
+            } else if (this.helpUrl) {
+                window.open(this.helpUrl);
+            }
+        },
+
         getSettings: function() {
             return {};
         },