Search in Settings for Japanese

Normalize Hiragana and Katakana in Settings search.

Fixes: 28410478
Test: manual - set the device language to Japanese
               and search in Settings.
Test: manual

Change-Id: Iee76da6a895ea006959c23f4eb64f62af0917c34

src/com/android/settings/search/SearchFeatureProviderImpl.java

@@ -24,8 +24,11 @@ import android.util.Log;
 
 import com.android.settings.dashboard.SiteMapManager;
 import com.android.settings.overlay.FeatureFactory;
+import com.android.settings.search.indexing.IndexData;
 import com.android.settingslib.wrapper.PackageManagerWrapper;
 
+import java.util.Locale;
+
 /**
  * FeatureProvider for the refactored search code.
  */
@@ -130,6 +133,9 @@ public class SearchFeatureProviderImpl implements SearchFeatureProvider {
         if (TextUtils.isEmpty(query)) {
             return null;
         }
+        if (Locale.getDefault().equals(Locale.JAPAN)) {
+            query = IndexData.normalizeJapaneseString(query);
+        }
         return query.trim();
     }
 }

src/com/android/settings/search/indexing/IndexData.java

@@ -29,6 +29,7 @@ import com.android.settings.search.ResultPayloadUtils;
 import com.android.settings.search.SearchIndexableResources;
 
 import java.text.Normalizer;
+import java.util.Locale;
 import java.util.Objects;
 import java.util.regex.Pattern;
 
@@ -69,9 +70,15 @@ public class IndexData {
     private IndexData(Builder builder) {
         locale = builder.mLocale;
         updatedTitle = normalizeHyphen(builder.mTitle);
-        normalizedTitle = normalizeString(builder.mTitle);
         updatedSummaryOn = normalizeHyphen(builder.mSummaryOn);
+        if (Locale.JAPAN.toString().equalsIgnoreCase(locale)) {
+            // Special case for JP. Convert charset to the same type for indexing purpose.
+            normalizedTitle = normalizeJapaneseString(builder.mTitle);
+            normalizedSummaryOn = normalizeJapaneseString(builder.mSummaryOn);
+        } else {
+            normalizedTitle = normalizeString(builder.mTitle);
             normalizedSummaryOn = normalizeString(builder.mSummaryOn);
+        }
         entries = builder.mEntries;
         className = builder.mClassName;
         childClassName = builder.mChildClassName;
@@ -133,6 +140,24 @@ public class IndexData {
         return REMOVE_DIACRITICALS_PATTERN.matcher(normalized).replaceAll("").toLowerCase();
     }
 
+    public static String normalizeJapaneseString(String input) {
+        final String nohyphen = (input != null) ? input.replaceAll(HYPHEN, EMPTY) : EMPTY;
+        final String normalized = Normalizer.normalize(nohyphen, Normalizer.Form.NFKD);
+        final StringBuffer sb = new StringBuffer();
+        final int length = normalized.length();
+        for (int i = 0; i < length; i++) {
+            char c = normalized.charAt(i);
+            // Convert Hiragana to full-width Katakana
+            if (c >= '\u3041' && c <= '\u3096') {
+                sb.append((char) (c - '\u3041' + '\u30A1'));
+            } else {
+                sb.append(c);
+            }
+        }
+
+        return REMOVE_DIACRITICALS_PATTERN.matcher(sb.toString()).replaceAll("").toLowerCase();
+    }
+
     public static class Builder {
         private String mLocale;
         private String mTitle;
@@ -273,8 +298,8 @@ public class IndexData {
                     || TextUtils.equals(mIntentTargetPackage,
                     SearchIndexableResources.SUBSETTING_TARGET_PACKAGE)) {
                 // Action is null, we will launch it as a sub-setting
-                intent = DatabaseIndexingUtils.buildSearchResultPageIntent(context, mClassName, mKey,
-                        mScreenTitle);
+                intent = DatabaseIndexingUtils.buildSearchResultPageIntent(context, mClassName,
+                        mKey, mScreenTitle);
             } else {
                 intent = new Intent(mIntentAction);
                 final String targetClass = mIntentTargetClass;

tests/robotests/src/com/android/settings/search/indexing/IndexDataTest.java

@@ -17,15 +17,17 @@
 
 package com.android.settings.search.indexing;
 
-import android.content.ComponentName;
-import android.content.Intent;
-import android.content.Context;
+import static com.google.common.truth.Truth.assertThat;
 
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+
+import com.android.settings.TestConfig;
 import com.android.settings.search.InlineSwitchPayload;
 import com.android.settings.search.ResultPayload;
 import com.android.settings.search.ResultPayloadUtils;
 import com.android.settings.testutils.SettingsRobolectricTestRunner;
-import com.android.settings.TestConfig;
 
 import org.junit.Before;
 import org.junit.Test;
@@ -33,8 +35,6 @@ import org.junit.runner.RunWith;
 import org.robolectric.RuntimeEnvironment;
 import org.robolectric.annotation.Config;
 
-import static com.google.common.truth.Truth.assertThat;
-
 @RunWith(SettingsRobolectricTestRunner.class)
 @Config(manifest = TestConfig.MANIFEST_PATH, sdk = TestConfig.SDK_VERSION)
 public class IndexDataTest {
@@ -141,6 +141,14 @@ public class IndexDataTest {
         assertThat(name.getPackageName()).isEqualTo(INTENT_TARGET_PACKAGE);
     }
 
+    @Test
+    public void testNormalizeJapaneseString() {
+        final String japaneseString = "\u3042\u3077\u308a";
+        final String normalizedJapaneseString = "\u30a2\u30d5\u309a\u30ea";
+
+        String result = IndexData.normalizeJapaneseString(japaneseString);
+        assertThat(result).isEqualTo(normalizedJapaneseString);
+    }
 
     private IndexData generateRow() {
         return mBuilder.build(mContext);