diff --git a/Lib/src/com/yarcat/chemistrylines/view/FieldHightlights.java b/Lib/src/com/yarcat/chemistrylines/view/FieldHightlights.java
index b14f891..d64d31d 100644
--- a/Lib/src/com/yarcat/chemistrylines/view/FieldHightlights.java
+++ b/Lib/src/com/yarcat/chemistrylines/view/FieldHightlights.java
@@ -5,14 +5,14 @@
 
 import com.yarcat.chemistrylines.algorithms.Path;
 import com.yarcat.chemistrylines.field.Field;
-import com.yarcat.chemistrylines.view.SelectionInView.SelectionListener;
+import com.yarcat.chemistrylines.view.SelectionInView;
 
-public class FieldHightlights implements SelectionListener {
+public class FieldHightlights implements SelectionInView.Listener {
     // @formatter:off
     public enum Mark {
-        SelectedAsSource,
-        SelectedAsDestination,
-        ReachableFromSource,
+        SOURCE,
+        TARGET,
+        REACHABLE,
     }
     // @formatter:on
 
@@ -47,24 +47,24 @@ public boolean hasMark(int n, Mark m) {
 
     @Override
     public void onNewSource(int n) {
-        setMark(n, Mark.SelectedAsSource);
+        setMark(n, Mark.SOURCE);
         markCellsReachableFrom(n);
     }
 
     @Override
     public void onNewTarget(int n) {
-        setMark(n, Mark.SelectedAsDestination);
+        setMark(n, Mark.TARGET);
     }
 
     @Override
     public void onSourceCleared(int n) {
-        clearMark(n, Mark.SelectedAsSource);
+        clearMark(n, Mark.SOURCE);
         clearCellsReachableFrom(n);
     }
 
     @Override
     public void onTargetCleared(int n) {
-        clearMark(n, Mark.SelectedAsDestination);
+        clearMark(n, Mark.TARGET);
     }
 
     private void markCellsReachableFrom(int n) {
@@ -72,7 +72,7 @@ private void markCellsReachableFrom(int n) {
         boolean markEmpties = p.reachableCount < mField.getLength() * 2 / 3;
         for (int i = 0; i < mField.getLength(); ++i) {
             if (p.isReachable(i) && (!mField.at(i).isEmpty() || markEmpties)) {
-                setMark(i, Mark.ReachableFromSource);
+                setMark(i, Mark.REACHABLE);
             }
         }
 
@@ -80,7 +80,7 @@ private void markCellsReachableFrom(int n) {
 
     private void clearCellsReachableFrom(int n) {
         for (int i = 0; i < mField.getLength(); ++i) {
-            clearMark(i, Mark.ReachableFromSource);
+            clearMark(i, Mark.REACHABLE);
         }
     }
 }
diff --git a/Lib/src/com/yarcat/chemistrylines/view/SelectionInView.java b/Lib/src/com/yarcat/chemistrylines/view/SelectionInView.java
index 85ac08c..723ff0a 100644
--- a/Lib/src/com/yarcat/chemistrylines/view/SelectionInView.java
+++ b/Lib/src/com/yarcat/chemistrylines/view/SelectionInView.java
@@ -3,19 +3,20 @@
 import android.annotation.SuppressLint;
 
 public class SelectionInView {
-    public interface SelectionListener {
+    public interface Listener {
 
         public void onNewSource(int n);
 
         public void onNewTarget(int n);
 
-        public void onSourceCleared(int i);
+        public void onSourceCleared(int n);
 
-        public void onTargetCleared(int i);
+        public void onTargetCleared(int n);
     }
 
-    private SelectionListener mListener;
-    private final int[] mSelection = new int[] { -1, -1 };
+    private Listener mListener;
+    private int mSource = -1;
+    private int mTarget = -1;
 
     public void select(int n) {
         if (hasSource()) {
@@ -31,7 +32,7 @@ public void select(int n) {
 
     private void selectSource(int n) {
         clearSource();
-        mSelection[0] = n;
+        mSource = n;
         if (mListener != null && hasSource()) {
             mListener.onNewSource(n);
         }
@@ -39,7 +40,7 @@ private void selectSource(int n) {
 
     private void selectTarget(int n) {
         clearTarget();
-        mSelection[1] = n;
+        mTarget = n;
         if (mListener != null && hasTarget()) {
             mListener.onNewTarget(n);
         }
@@ -48,50 +49,43 @@ private void selectTarget(int n) {
     public void clearSource() {
         if (hasSource()) {
             if (mListener != null) {
-                mListener.onSourceCleared(mSelection[0]);
+                mListener.onSourceCleared(mSource);
             }
-            mSelection[0] = -1;
+            mSource = -1;
         }
     }
 
     public void clearTarget() {
         if (hasTarget()) {
             if (mListener != null) {
-                mListener.onTargetCleared(mSelection[1]);
+                mListener.onTargetCleared(mTarget);
             }
-            mSelection[1] = -1;
+            mTarget = -1;
         }
     }
 
     public void clear() {
-        if (mListener != null) {
-            if (hasSource()) {
-                mListener.onSourceCleared(mSelection[0]);
-            }
-            if (hasTarget()) {
-                mListener.onTargetCleared(mSelection[1]);
-            }
-        }
-        mSelection[0] = mSelection[1] = -1;
+        clearSource();
+        clearTarget();
     }
 
     public boolean hasSource() {
-        return mSelection[0] != -1;
+        return mSource != -1;
     }
 
     public int getSource() {
-        return mSelection[0];
+        return mSource;
     }
 
     public boolean hasTarget() {
-        return mSelection[1] != -1;
+        return mTarget != -1;
     }
 
     public int getTarget() {
-        return mSelection[1];
+        return mTarget;
     }
 
-    public void setListener(SelectionListener l) {
+    public void setListener(Listener l) {
         mListener = l;
     }
 
@@ -99,6 +93,6 @@ public void setListener(SelectionListener l) {
     @Override
     public String toString() {
         return String
-            .format("Selection(%d,  %d)", mSelection[0], mSelection[1]);
+            .format("Selection(%d,  %d)", mSource, mTarget);
     }
 }
diff --git a/Swing/src/com/yarcat/chemistrylines/swing/SwingField.java b/Swing/src/com/yarcat/chemistrylines/swing/SwingField.java
index 91e55b2..6eb4205 100644
--- a/Swing/src/com/yarcat/chemistrylines/swing/SwingField.java
+++ b/Swing/src/com/yarcat/chemistrylines/swing/SwingField.java
@@ -35,7 +35,7 @@ boolean isEmpty() {
             return cell().isEmpty();
         }
 
-        private boolean marked(Mark m) {
+        private boolean markedAs(Mark m) {
             return mFieldMarks.hasMark(n, m);
         }
 
@@ -48,11 +48,11 @@ void updateStyle() {
         @Override
         Color getBgColor() {
             Color bg;
-            if (marked(Mark.SelectedAsSource)) {
+            if (markedAs(Mark.SOURCE)) {
                 bg = Color.DARK_GRAY;
-            } else if (marked(Mark.SelectedAsDestination)) {
+            } else if (markedAs(Mark.TARGET)) {
                 bg = Color.GRAY;
-            } else if (isEmpty() && marked(Mark.ReachableFromSource)) {
+            } else if (isEmpty() && markedAs(Mark.REACHABLE)) {
                 bg = style.REACHABLE_BG;
             } else {
                 bg = super.getBgColor();
@@ -61,7 +61,7 @@ Color getBgColor() {
         }
 
         private Border getEdge() {
-            return !isEmpty() && marked(Mark.ReachableFromSource)
+            return !isEmpty() && markedAs(Mark.REACHABLE)
                 ? style.REACHABLE_BORDER : style.DEFAULT_BORDER;
         }
     }
@@ -89,8 +89,8 @@ void refresh() {
         }
     }
 
-    Cell at(int i) {
-        return getField().at(i);
+    Cell at(int n) {
+        return getField().at(n);
     }
 
     Field getField() {
diff --git a/Swing/src/com/yarcat/chemistrylines/swing/style.java b/Swing/src/com/yarcat/chemistrylines/swing/style.java
index a2f937b..9b5376a 100644
--- a/Swing/src/com/yarcat/chemistrylines/swing/style.java
+++ b/Swing/src/com/yarcat/chemistrylines/swing/style.java
@@ -22,7 +22,7 @@ public class style {
     final static Border DEFAULT_BORDER =
         BorderFactory.createLineBorder(new Color(0x55, 0x44, 0x33));
     final static Border REACHABLE_BORDER =
-            BorderFactory.createLineBorder(new Color(0x20, 0x00, 0x30), 2);
+        BorderFactory.createLineBorder(new Color(0x20, 0x00, 0x30), 2);
     // @formatter:on
 
     static Component defaultColor(Component c) {