Feat: Label update

Update the function "toValidLabel" of file "com.cburch.logisim.circuit.Analyze.java"

Now when do analyze of circuit the pin that contain also only number, don't invert character and number, don't remove space.

Merge commit 98f7718 from pull request Logisim-Ita#37 Matt345Fire/Logisim-Locale

Logisim-Fork/src/main/java/com/cburch/logisim/circuit/Analyze.java

@@ -9,6 +9,7 @@
 import java.util.Map;
 import java.util.SortedMap;
 import java.util.TreeMap;
+import java.util.regex.Pattern;
 
 import com.cburch.logisim.analyze.model.AnalyzerModel;
 import com.cburch.logisim.analyze.model.Entry;
@@ -21,6 +22,7 @@
 import com.cburch.logisim.instance.StdAttr;
 import com.cburch.logisim.proj.Project;
 import com.cburch.logisim.std.wiring.Pin;
+import com.cburch.logisim.util.StringUtil;
 
 public class Analyze {
 
@@ -298,43 +300,21 @@ public int compare(Instance ac, Instance bc) {
 	 * throw new AnalyzeException.Conflict(); } } expressionMap.put(p2, e); } } } }
 	 */
 
+	// This function check label name
 	private static String toValidLabel(String label) {
-		if (label == null)
-			return null;
-		StringBuilder end = null;
-		StringBuilder ret = new StringBuilder();
-		boolean afterWhitespace = false;
-		for (int i = 0; i < label.length(); i++) {
+		StringBuilder buildLabel = new StringBuilder();	//StringBuilder for hold string in building
+		for(int i = 0; i < label.length(); i++) {
 			char c = label.charAt(i);
-			if (Character.isJavaIdentifierStart(c)) {
-				if (afterWhitespace) {
-					// capitalize words after the first one
-					c = Character.toTitleCase(c);
-					afterWhitespace = false;
-				}
-				ret.append(c);
-			} else if (Character.isJavaIdentifierPart(c)) {
-				// If we can't place it at the start, we'll dump it
-				// onto the end.
-				if (ret.length() > 0) {
-					ret.append(c);
-				} else {
-					if (end == null)
-						end = new StringBuilder();
-					end.append(c);
-				}
-				afterWhitespace = false;
-			} else if (Character.isWhitespace(c)) {
-				afterWhitespace = true;
-			} else {
-				; // just ignore any other characters
+			int unicode = label.codePointAt(i);			// Get character unicode 
+			if((unicode < 8192 || unicode > 8207) && (unicode < 8234 || unicode > 8239) && (unicode < 8298 || unicode > 8303)) { // Check that it is not a prohibited Unicode
+				buildLabel.append(c);					// Add character on final string
 			}
 		}
-		if (end != null && ret.length() > 0)
-			ret.append(end.toString());
-		if (ret.length() == 0)
+		String newLabel = buildLabel.toString().trim();
+		if(newLabel.length() > 0)						// If is find a character or number
+			return newLabel;							// Return a final string
+		else
 			return null;
-		return ret.toString();
 	}
 
 	private Analyze() {