Resume suggestion when backspacing to the end of a word

Bug: 5515381
Change-Id: I26fea896feaf2e9716c7ae3d4f2630360f23ac50

1 files changed, 46 insertions, 0 deletions

diff --git a/java/src/com/android/inputmethod/latin/WordComposer.java b/java/src/com/android/inputmethod/latin/WordComposer.java
index 612b16071..ef2e4d378 100644
--- a/java/src/com/android/inputmethod/latin/WordComposer.java
+++ b/java/src/com/android/inputmethod/latin/WordComposer.java
@@ -17,7 +17,9 @@
 package com.android.inputmethod.latin;
 
 import com.android.inputmethod.keyboard.Keyboard;
+import com.android.inputmethod.keyboard.Key;
 import com.android.inputmethod.keyboard.KeyDetector;
+import com.android.inputmethod.keyboard.LatinKeyboard;
 
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -137,6 +139,50 @@ public class WordComposer {
     }
 
     /**
+     * Internal method to retrieve reasonable proximity info for a character.
+     */
+    private void addKeyInfo(final int codePoint, final LatinKeyboard keyboard,
+            final KeyDetector keyDetector) {
+        for (final Key key : keyboard.mKeys) {
+            if (key.mCode == codePoint) {
+                final int x = key.mX + key.mWidth / 2;
+                final int y = key.mY + key.mHeight / 2;
+                final int[] codes = keyDetector.newCodeArray();
+                keyDetector.getKeyIndexAndNearbyCodes(x, y, codes);
+                add(codePoint, codes, x, y);
+                return;
+            }
+        }
+        add(codePoint, new int[] { codePoint },
+                WordComposer.NOT_A_COORDINATE, WordComposer.NOT_A_COORDINATE);
+    }
+
+    /**
+     * Set the currently composing word to the one passed as an argument.
+     * This will register NOT_A_COORDINATE for X and Ys, and use the passed keyboard for proximity.
+     */
+    public void setComposingWord(final CharSequence word, final LatinKeyboard keyboard,
+            final KeyDetector keyDetector) {
+        reset();
+        final int length = word.length();
+        for (int i = 0; i < length; ++i) {
+            int codePoint = word.charAt(i);
+            addKeyInfo(codePoint, keyboard, keyDetector);
+        }
+    }
+
+    /**
+     * Shortcut for the above method, this will create a new KeyDetector for the passed keyboard.
+     */
+    public void setComposingWord(final CharSequence word, final LatinKeyboard keyboard) {
+        final KeyDetector keyDetector = new KeyDetector(0);
+        keyDetector.setKeyboard(keyboard, 0, 0);
+        keyDetector.setProximityCorrectionEnabled(true);
+        keyDetector.setProximityThreshold(keyboard.mMostCommonKeyWidth);
+        setComposingWord(word, keyboard, keyDetector);
+    }
+
+    /**
      * Swaps the first and second values in the codes array if the primary code is not the first
      * value in the array but the second. This happens when the preferred key is not the key that
      * the user released the finger on.