Undefined value symbol as a parameter (instead of an em dash constant)

diagram-util/src/main/java/com/powsybl/diagram/util/ValueFormatter.java

@@ -14,8 +14,6 @@
  * @author Florian Dupuy <florian.dupuy at rte-france.com>
  */
 public class ValueFormatter {
-    /** em dash unicode for undefined value */
-    public static final String DASH_CHAR = "\u2014";
 
     /** degree sign unicode for degree symbol */
     private static final String DEGREE_CHAR = "\u00b0";
@@ -24,13 +22,15 @@ public class ValueFormatter {
     private final int voltageValuePrecision;
     private final int angleValuePrecision;
     private final DecimalFormat format;
+    private final String undefinedValueSymbol;
 
-    public ValueFormatter(int powerValuePrecision, int voltageValuePrecision, int angleValuePrecision, Locale locale) {
+    public ValueFormatter(int powerValuePrecision, int voltageValuePrecision, int angleValuePrecision, Locale locale, String undefinedValueSymbol) {
         this.powerValuePrecision = powerValuePrecision;
         this.voltageValuePrecision = voltageValuePrecision;
         this.angleValuePrecision = angleValuePrecision;
         this.format = new DecimalFormat();
         format.setDecimalFormatSymbols(DecimalFormatSymbols.getInstance(locale));
+        this.undefinedValueSymbol = undefinedValueSymbol;
     }
 
     public String formatVoltage(double voltage) {
@@ -39,7 +39,7 @@ public String formatVoltage(double voltage) {
 
     public String formatVoltage(double voltage, String unit) {
         setFractionDigits(voltageValuePrecision);
-        String valueFormatted = Double.isNaN(voltage) ? DASH_CHAR : format.format(voltage);
+        String valueFormatted = Double.isNaN(voltage) ? undefinedValueSymbol : format.format(voltage);
         return valueFormatted + " " + unit;
     }
 
@@ -49,13 +49,13 @@ public String formatPower(double power) {
 
     public String formatPower(double power, String unit) {
         setFractionDigits(powerValuePrecision);
-        String valueFormatted = Double.isNaN(power) ? DASH_CHAR : format.format(power);
+        String valueFormatted = Double.isNaN(power) ? undefinedValueSymbol : format.format(power);
         return unit.isEmpty() ? valueFormatted : (valueFormatted + " " + unit);
     }
 
     public String formatAngleInDegrees(double angleInDegrees) {
         setFractionDigits(angleValuePrecision);
-        String valueFormatted = Double.isNaN(angleInDegrees) ? DASH_CHAR : format.format(angleInDegrees);
+        String valueFormatted = Double.isNaN(angleInDegrees) ? undefinedValueSymbol : format.format(angleInDegrees);
         return valueFormatted + DEGREE_CHAR;
     }
 

network-area-diagram/src/main/java/com/powsybl/nad/svg/SvgParameters.java

@@ -54,6 +54,9 @@ public class SvgParameters {
     private int angleValuePrecision = 1;
     private double pstArrowHeadSize = 8;
 
+    /** em dash unicode for undefined value */
+    private String undefinedValueSymbol = "";
+
     public enum CssLocation {
         INSERTED_IN_SVG, EXTERNAL_IMPORTED, EXTERNAL_NO_IMPORT
     }
@@ -103,6 +106,7 @@ public SvgParameters(SvgParameters other) {
         this.powerValuePrecision = other.powerValuePrecision;
         this.angleValuePrecision = other.angleValuePrecision;
         this.pstArrowHeadSize = other.pstArrowHeadSize;
+        this.undefinedValueSymbol = other.undefinedValueSymbol;
     }
 
     public Padding getDiagramPadding() {
@@ -437,7 +441,7 @@ public SvgParameters setAngleValuePrecision(int angleValuePrecision) {
     }
 
     public ValueFormatter createValueFormatter() {
-        return new ValueFormatter(powerValuePrecision, voltageValuePrecision, angleValuePrecision, Locale.forLanguageTag(languageTag));
+        return new ValueFormatter(powerValuePrecision, voltageValuePrecision, angleValuePrecision, Locale.forLanguageTag(languageTag), undefinedValueSymbol);
     }
 
     public double getPstArrowHeadSize() {
@@ -448,4 +452,13 @@ public SvgParameters setPstArrowHeadSize(double pstArrowHeadSize) {
         this.pstArrowHeadSize = pstArrowHeadSize;
         return this;
     }
+
+    public String getUndefinedValueSymbol() {
+        return undefinedValueSymbol;
+    }
+
+    public SvgParameters setUndefinedValueSymbol(String undefinedValueSymbol) {
+        this.undefinedValueSymbol = undefinedValueSymbol;
+        return this;
+    }
 }

network-area-diagram/src/test/java/com/powsybl/nad/svg/SvgParametersTest.java

@@ -54,7 +54,8 @@ public void test() {
                 .setVoltageValuePrecision(0)
                 .setAngleValuePrecision(2)
                 .setPowerValuePrecision(3)
-                .setPstArrowHeadSize(20);
+                .setPstArrowHeadSize(20)
+                .setUndefinedValueSymbol("\u002A");
 
         SvgParameters svgParameters1 = new SvgParameters(svgParameters0);
 
@@ -98,5 +99,6 @@ public void test() {
         assertEquals(svgParameters0.getAngleValuePrecision(), svgParameters1.getAngleValuePrecision());
         assertEquals(svgParameters0.getPowerValuePrecision(), svgParameters1.getPowerValuePrecision());
         assertEquals(svgParameters0.getPstArrowHeadSize(), svgParameters1.getPstArrowHeadSize(), 0);
+        assertEquals(svgParameters0.getUndefinedValueSymbol(), svgParameters1.getUndefinedValueSymbol());
     }
 }