support of RichTextFX to have syntax highlighting in the groovy edit field of validation editor

src/main/resources/ninja/javafx/smartcsv/fx/about/about.fxml

@@ -58,6 +58,7 @@
                   <RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
                   <RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
                   <RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
+                  <RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
               </rowConstraints>
                <children>
                   <Label text="junit" />
@@ -80,7 +81,8 @@
                    <Hyperlink onAction="#openLinkInBrowser" text="http://fxexperience.com/controlsfx/" GridPane.columnIndex="1" GridPane.rowIndex="8" />
                    <Label text="Apache Log4j 2" GridPane.rowIndex="9" />
                    <Hyperlink onAction="#openLinkInBrowser" text="http://logging.apache.org/log4j/2.x/" GridPane.columnIndex="1" GridPane.rowIndex="9" />
-
+                   <Label text="RichTextFX" GridPane.rowIndex="10" />
+                   <Hyperlink onAction="#openLinkInBrowser" text="https://github.com/TomasMikula/RichTextFX" GridPane.columnIndex="1" GridPane.rowIndex="10" />
                </children>
                <padding>
                   <Insets bottom="4.0" left="8.0" right="8.0" top="4.0" />

src/main/resources/ninja/javafx/smartcsv/fx/smartcsv.css

@@ -179,4 +179,35 @@
     -fx-text-fill: black;
     -fx-font-size: 12px;
     -fx-padding: 10 10 10 10;
+}
+
+.keyword {
+    -fx-fill: purple;
+    -fx-font-weight: bold;
+}
+.semicolon {
+    -fx-font-weight: bold;
+}
+.paren {
+    -fx-fill: firebrick;
+    -fx-font-weight: bold;
+}
+.bracket {
+    -fx-fill: darkgreen;
+    -fx-font-weight: bold;
+}
+.brace {
+    -fx-fill: teal;
+    -fx-font-weight: bold;
+}
+.string {
+    -fx-fill: blue;
+}
+
+.comment {
+    -fx-fill: cadetblue;
+}
+
+.paragraph-box:has-caret {
+    -fx-background-color: #f2f9fc;
 }

src/main/resources/ninja/javafx/smartcsv/fx/validation/validationEditor.fxml

@@ -10,6 +10,8 @@
 <?import javafx.scene.layout.GridPane?>
 <?import javafx.scene.layout.RowConstraints?>
 
+<?import org.fxmisc.richtext.CodeArea?>
+<?import java.net.URL?>
 <GridPane hgap="10.0" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefWidth="600.0" vgap="10.0" xmlns="http://javafx.com/javafx/8.0.101" xmlns:fx="http://javafx.com/fxml/1">
   <columnConstraints>
       <ColumnConstraints halignment="CENTER" hgrow="NEVER" maxWidth="50.0" prefWidth="50.0" />
@@ -50,7 +52,7 @@
       <TextField fx:id="dateformatRuleTextField" GridPane.columnIndex="2" GridPane.rowIndex="7" />
       <TextField fx:id="regexpRuleTextField" GridPane.columnIndex="2" GridPane.rowIndex="8" />
       <TextField fx:id="valueOfRuleTextField" GridPane.columnIndex="2" GridPane.rowIndex="9" />
-      <TextArea fx:id="groovyRuleTextArea" prefHeight="300.0" prefWidth="200.0" GridPane.columnIndex="2" GridPane.rowIndex="10" GridPane.rowSpan="2" />
+      <CodeArea fx:id="groovyRuleTextArea" prefHeight="300.0" prefWidth="200.0" GridPane.columnIndex="2" GridPane.rowIndex="10" GridPane.rowSpan="2" />
       <CheckBox fx:id="enableNotEmptyRule" mnemonicParsing="false" GridPane.rowIndex="1" />
       <CheckBox fx:id="enableIntegerRule" mnemonicParsing="false" GridPane.rowIndex="2" />
       <CheckBox fx:id="enableDoubleRule" mnemonicParsing="false" GridPane.rowIndex="3" />
@@ -68,4 +70,7 @@
    <padding>
       <Insets bottom="10.0" left="10.0" right="10.0" top="10.0" />
    </padding>
+    <stylesheets>
+        <URL value="@/ninja/javafx/smartcsv/fx/smartcsv.css" />
+    </stylesheets>
 </GridPane>