Make abstract KeyDetector class

The KeyDetector abstracts key detection algorithm. The
ProximityKeyDetector is one of its concrete implementations.  Another
one that might be called XAxisKeyDetector will follow to realize the
pop-up mini-keyboard behavior described in bug#2959169.

Bug: 2959169
Change-Id: Idd3fc53282e6b721ec7a4ce500af8aba21ce07a3

1 files changed, 3 insertions, 27 deletions

diff --git a/java/src/com/android/inputmethod/latin/ProximityKeyDetector.java b/java/src/com/android/inputmethod/latin/ProximityKeyDetector.java
index eae2d7f08..6ee005510 100644
--- a/java/src/com/android/inputmethod/latin/ProximityKeyDetector.java
+++ b/java/src/com/android/inputmethod/latin/ProximityKeyDetector.java
@@ -16,48 +16,24 @@
 
 package com.android.inputmethod.latin;
 
-import android.inputmethodservice.Keyboard;
 import android.inputmethodservice.Keyboard.Key;
 
 import java.util.Arrays;
 
-class ProximityKeyDetector {
+class ProximityKeyDetector extends KeyDetector {
     private static final int MAX_NEARBY_KEYS = 12;
 
-    private Keyboard mKeyboard;
-    private Key[] mKeys;
-
-    private boolean mProximityCorrectOn;
-    private int mProximityThresholdSquare;
-
     // working area
     private int[] mDistances = new int[MAX_NEARBY_KEYS];
 
-    public void setKeyboard(Keyboard keyboard, Key[] keys) {
-        if (keyboard == null || keys == null)
-            throw new NullPointerException();
-        mKeyboard = keyboard;
-        mKeys = keys;
-    }
-
-    public void setProximityCorrectionEnabled(boolean enabled) {
-        mProximityCorrectOn = enabled;
-    }
-
-    public boolean isProximityCorrectionEnabled() {
-        return mProximityCorrectOn;
-    }
-
-    public void setProximityThreshold(int threshold) {
-        mProximityThresholdSquare = threshold * threshold;
-    }
-
+    @Override
     public int[] newCodeArray() {
         int[] codes = new int[MAX_NEARBY_KEYS];
         Arrays.fill(codes, LatinKeyboardBaseView.NOT_A_KEY);
         return codes;
     }
 
+    @Override
     public int getKeyIndexAndNearbyCodes(int x, int y, int[] allKeys) {
         final Key[] keys = mKeys;
         if (keys == null)