From 17f7b406aa976ea147497dccac8e80c3aaaae370 Mon Sep 17 00:00:00 2001
From: Satoshi Kataoka <satok@google.com>
Date: Wed, 19 Sep 2012 20:03:13 +0900
Subject: [PATCH] Clear cache of user dic

Change-Id: Iec2793de3fff7bf15f68f82a50331de7742b7049
---
 .../AndroidWordLevelSpellCheckerSession.java  | 23 +++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/java/src/com/android/inputmethod/latin/spellcheck/AndroidWordLevelSpellCheckerSession.java b/java/src/com/android/inputmethod/latin/spellcheck/AndroidWordLevelSpellCheckerSession.java
index f4784ff1a..d9b622a18 100644
--- a/java/src/com/android/inputmethod/latin/spellcheck/AndroidWordLevelSpellCheckerSession.java
+++ b/java/src/com/android/inputmethod/latin/spellcheck/AndroidWordLevelSpellCheckerSession.java
@@ -16,6 +16,9 @@
 
 package com.android.inputmethod.latin.spellcheck;
 
+import android.content.ContentResolver;
+import android.database.ContentObserver;
+import android.provider.UserDictionary.Words;
 import android.service.textservice.SpellCheckerService.Session;
 import android.text.TextUtils;
 import android.util.Log;
@@ -45,6 +48,7 @@ public abstract class AndroidWordLevelSpellCheckerSession extends Session {
     private int mScript; // One of SCRIPT_LATIN or SCRIPT_CYRILLIC for now.
     private final AndroidSpellCheckerService mService;
     protected final SuggestionsCache mSuggestionsCache = new SuggestionsCache();
+    private final ContentObserver mObserver;
 
     private static class SuggestionsParams {
         public final String[] mSuggestions;
@@ -83,10 +87,23 @@ public abstract class AndroidWordLevelSpellCheckerSession extends Session {
             mUnigramSuggestionsInfoCache.put(
                     generateKey(query, prevWord), new SuggestionsParams(suggestions, flags));
         }
+
+        public void clearCache() {
+            mUnigramSuggestionsInfoCache.evictAll();
+        }
     }
 
     AndroidWordLevelSpellCheckerSession(final AndroidSpellCheckerService service) {
         mService = service;
+        final ContentResolver cres = service.getContentResolver();
+
+        mObserver = new ContentObserver(null) {
+            @Override
+            public void onChange(boolean self) {
+                mSuggestionsCache.clearCache();
+            }
+        };
+        cres.registerContentObserver(Words.CONTENT_URI, true, mObserver);
     }
 
     @Override
@@ -97,6 +114,12 @@ public abstract class AndroidWordLevelSpellCheckerSession extends Session {
         mScript = AndroidSpellCheckerService.getScriptFromLocale(mLocale);
     }
 
+    @Override
+    public void onClose() {
+        final ContentResolver cres = mService.getContentResolver();
+        cres.unregisterContentObserver(mObserver);
+    }
+
     /*
      * Returns whether the code point is a letter that makes sense for the specified
      * locale for this spell checker.