Merge pull request #470 from JordanMartinez/fixMoveSelectedTextBug

Fix move selected text bug

Author: JordanMartinez

richtextfx/src/main/java/org/fxmisc/richtext/model/EditActions.java

@@ -1,6 +1,7 @@
 package org.fxmisc.richtext.model;
 
 import javafx.scene.control.IndexRange;
+import org.fxmisc.richtext.GenericStyledArea;
 
 /**
  * Extended edit actions for {@link TextEditingArea}.
@@ -176,7 +177,7 @@ default void replaceSelection(StyledDocument<PS, SEG, S> replacement) {
     default void moveSelectedText(int pos) {
         IndexRange sel = getSelection();
 
-        if(pos >= sel.getStart() && pos <= sel.getEnd()) {
+        if((pos >= sel.getStart() && pos <= sel.getEnd()) || sel.equals(GenericStyledArea.EMPTY_RANGE)) {
             // no move, just position the caret
             selectRange(pos, pos);
         } else {

richtextfx/src/main/java/org/fxmisc/richtext/model/TextChange.java

@@ -15,22 +15,7 @@ public static enum ChangeType {
     }
 
     private ChangeType type;
-    public final ChangeType getType() {
-        if (type == null) {
-            if (insertedLength() == 0) {
-                if (removedLength() == 0) {
-                    throw new IllegalStateException("Cannot get the type of a change that neither inserts nor deletes anything.");
-                } else {
-                    type = ChangeType.DELETION;
-                }
-            } else if (removedLength() == 0) {
-                type = ChangeType.INSERTION;
-            } else {
-                type = ChangeType.REPLACEMENT;
-            }
-        }
-        return type;
-    }
+    public final ChangeType getType() { return type; }
 
     protected final int position;
     protected final S removed;
@@ -40,6 +25,18 @@ public TextChange(int position, S removed, S inserted) {
         this.position = position;
         this.removed = removed;
         this.inserted = inserted;
+
+        if (insertedLength() == 0) {
+            if (removedLength() == 0) {
+                throw new IllegalStateException("Cannot get the type of a change that neither inserts nor deletes anything.");
+            } else {
+                type = ChangeType.DELETION;
+            }
+        } else if (removedLength() == 0) {
+            type = ChangeType.INSERTION;
+        } else {
+            type = ChangeType.REPLACEMENT;
+        }
     }
 
     public int getPosition() { return position; };
@@ -97,7 +94,7 @@ public final String toString() {
         return
                 this.getClass().getSimpleName() + "{\n" +
                 "\tposition: "  + position  + "\n" +
-                "\ttype: "      + getType() + "\n" +
+                "\ttype: "      + type      + "\n" +
                 "\tremoved: "   + removed   + "\n" +
                 "\tinserted: "  + inserted  + "\n" +
                 "}";