Use KeyboardTheme id insteand of index

This CL must be checked in together with I771216f8bd.

Bug: 14042743
Change-Id: I45c3acf9242985fb03721a9a6d377fbccc8e2019

7 files changed, 62 insertions, 73 deletions

diff --git a/java/res/values/config-common.xml b/java/res/values/config-common.xml
index 20d5860e3..3fe4b947c 100644
--- a/java/res/values/config-common.xml
+++ b/java/res/values/config-common.xml
@@ -24,8 +24,8 @@
          at input history to suggest a hopefully helpful suggestions for the next word? -->
     <bool name="config_default_next_word_prediction">true</bool>
 
-    <!-- This configuration is an index of  {@link KeyboardSwitcher#KEYBOARD_THEMES[]}. -->
-    <string name="config_default_keyboard_theme_index" translatable="false">2</string>
+    <!-- This configuration must be aligned with {@link KeyboardTheme#DEFAULT_THEME_ID}. -->
+    <string name="config_default_keyboard_theme_id" translatable="false">2</string>
 
     <integer name="config_delay_update_shift_state">100</integer>
     <integer name="config_double_space_period_timeout">1100</integer>
diff --git a/java/res/values/donottranslate.xml b/java/res/values/donottranslate.xml
index 4be5863f2..99775104d 100644
--- a/java/res/values/donottranslate.xml
+++ b/java/res/values/donottranslate.xml
@@ -58,7 +58,7 @@
         <item>@string/layout_gingerbread</item>
         <item>@string/layout_klp</item>
     </string-array>
-    <!-- An element must be an index of {@link KeyboardSwitcher#KEYBOARD_THEMES[]}. -->
+    <!-- An element must be a keyboard theme id of {@link KeyboardTheme#THEME_ID_*}. -->
     <string-array name="keyboard_layout_modes_values">
         <item>0</item>
         <item>1</item>
@@ -66,12 +66,12 @@
     </string-array>
 
     <!-- For keyboard color scheme option dialog. -->
-    <string-array name="keyboard_color_schemes">
+    <string-array name="keyboard_theme_names">
         <item>@string/keyboard_color_scheme_white</item>
         <item>@string/keyboard_color_scheme_blue</item>
     </string-array>
-    <!-- An element must be an index of {@link KeyboardSwitcher#KEYBOARD_THEMES[]}. -->
-    <string-array name="keyboard_color_schemes_values">
+    <!-- An element must be a keyboard theme id of {@link KeyboardTheme#THEME_ID_*}. -->
+    <string-array name="keyboard_theme_ids">
         <item>2</item>
         <item>0</item>
     </string-array>
diff --git a/java/res/xml/prefs.xml b/java/res/xml/prefs.xml
index a39ce4ae8..3e3bedf15 100644
--- a/java/res/xml/prefs.xml
+++ b/java/res/xml/prefs.xml
@@ -168,9 +168,9 @@
                 android:key="pref_keyboard_layout_20110916"
                 android:title="@string/keyboard_color_scheme"
                 android:persistent="true"
-                android:entryValues="@array/keyboard_color_schemes_values"
-                android:entries="@array/keyboard_color_schemes"
-                android:defaultValue="@string/config_default_keyboard_theme_index" />
+                android:entryValues="@array/keyboard_theme_ids"
+                android:entries="@array/keyboard_theme_names"
+                android:defaultValue="@string/config_default_keyboard_theme_id" />
             <PreferenceScreen
                 android:fragment="com.android.inputmethod.latin.settings.AdditionalSubtypeSettings"
                 android:key="custom_input_styles"
diff --git a/java/res/xml/prefs_for_debug.xml b/java/res/xml/prefs_for_debug.xml
index 7b2b8eab4..7fab15bab 100644
--- a/java/res/xml/prefs_for_debug.xml
+++ b/java/res/xml/prefs_for_debug.xml
@@ -33,7 +33,7 @@
         android:persistent="true"
         android:entryValues="@array/keyboard_layout_modes_values"
         android:entries="@array/keyboard_layout_modes"
-        android:defaultValue="@string/config_default_keyboard_theme_index" />
+        android:defaultValue="@string/config_default_keyboard_theme_id" />
     <CheckBoxPreference
         android:key="debug_mode"
         android:title="@string/prefs_debug_mode"
diff --git a/java/src/com/android/inputmethod/keyboard/KeyboardSwitcher.java b/java/src/com/android/inputmethod/keyboard/KeyboardSwitcher.java
index 6074a8106..6131a9b17 100644
--- a/java/src/com/android/inputmethod/keyboard/KeyboardSwitcher.java
+++ b/java/src/com/android/inputmethod/keyboard/KeyboardSwitcher.java
@@ -38,7 +38,6 @@ import com.android.inputmethod.latin.R;
 import com.android.inputmethod.latin.RichInputMethodManager;
 import com.android.inputmethod.latin.SubtypeSwitcher;
 import com.android.inputmethod.latin.WordComposer;
-import com.android.inputmethod.latin.settings.Settings;
 import com.android.inputmethod.latin.settings.SettingsValues;
 import com.android.inputmethod.latin.utils.ResourceUtils;
 
@@ -66,8 +65,7 @@ public final class KeyboardSwitcher implements KeyboardState.SwitchActions {
      * what user actually typed. */
     private boolean mIsAutoCorrectionActive;
 
-    private KeyboardTheme mKeyboardTheme =
-            KeyboardTheme.KEYBOARD_THEMES[KeyboardTheme.DEFAULT_THEME_INDEX];
+    private KeyboardTheme mKeyboardTheme = KeyboardTheme.getDefaultKeyboardTheme();
     private Context mThemeContext;
 
     private static final KeyboardSwitcher sInstance = new KeyboardSwitcher();
@@ -96,25 +94,12 @@ public final class KeyboardSwitcher implements KeyboardState.SwitchActions {
 
     public void updateKeyboardTheme() {
         final boolean themeUpdated = updateKeyboardThemeAndContextThemeWrapper(
-                mLatinIME, getKeyboardTheme(mLatinIME, mPrefs));
+                mLatinIME, KeyboardTheme.getKeyboardTheme(mPrefs));
         if (themeUpdated && mKeyboardView != null) {
             mLatinIME.setInputView(onCreateInputView(mIsHardwareAcceleratedDrawingEnabled));
         }
     }
 
-    private static KeyboardTheme getKeyboardTheme(final Context context,
-            final SharedPreferences prefs) {
-        final Resources res = context.getResources();
-        final int index = Settings.readKeyboardThemeIndex(prefs, res);
-        if (index >= 0 && index < KeyboardTheme.KEYBOARD_THEMES.length) {
-            return KeyboardTheme.KEYBOARD_THEMES[index];
-        }
-        final int defaultThemeIndex = Settings.resetAndGetDefaultKeyboardThemeIndex(prefs, res);
-        Log.w(TAG, "Illegal keyboard theme in preference: " + index + ", default to "
-                + defaultThemeIndex);
-        return KeyboardTheme.KEYBOARD_THEMES[defaultThemeIndex];
-    }
-
     private boolean updateKeyboardThemeAndContextThemeWrapper(final Context context,
             final KeyboardTheme keyboardTheme) {
         if (mThemeContext == null || mKeyboardTheme.mThemeId != keyboardTheme.mThemeId) {
diff --git a/java/src/com/android/inputmethod/keyboard/KeyboardTheme.java b/java/src/com/android/inputmethod/keyboard/KeyboardTheme.java
index d15942728..6ec9d99b2 100644
--- a/java/src/com/android/inputmethod/keyboard/KeyboardTheme.java
+++ b/java/src/com/android/inputmethod/keyboard/KeyboardTheme.java
@@ -16,18 +16,24 @@
 
 package com.android.inputmethod.keyboard;
 
+import android.content.SharedPreferences;
+import android.util.Log;
+
 import com.android.inputmethod.latin.R;
+import com.android.inputmethod.latin.settings.Settings;
 
 public final class KeyboardTheme {
-    public static final int THEME_INDEX_ICS = 0;
-    public static final int THEME_INDEX_GB = 1;
-    public static final int THEME_INDEX_KLP = 2;
-    public static final int DEFAULT_THEME_INDEX = THEME_INDEX_KLP;
-
-    public static final KeyboardTheme[] KEYBOARD_THEMES = {
-        new KeyboardTheme(THEME_INDEX_ICS, R.style.KeyboardTheme_ICS),
-        new KeyboardTheme(THEME_INDEX_GB, R.style.KeyboardTheme_GB),
-        new KeyboardTheme(THEME_INDEX_KLP, R.style.KeyboardTheme_KLP),
+    private static final String TAG = KeyboardTheme.class.getSimpleName();
+
+    public static final int THEME_ID_ICS = 0;
+    public static final int THEME_ID_GB = 1;
+    public static final int THEME_ID_KLP = 2;
+    private static final int DEFAULT_THEME_ID = THEME_ID_KLP;
+
+    private static final KeyboardTheme[] KEYBOARD_THEMES = {
+        new KeyboardTheme(THEME_ID_ICS, R.style.KeyboardTheme_ICS),
+        new KeyboardTheme(THEME_ID_GB, R.style.KeyboardTheme_GB),
+        new KeyboardTheme(THEME_ID_KLP, R.style.KeyboardTheme_KLP),
     };
 
     public final int mThemeId;
@@ -39,4 +45,39 @@ public final class KeyboardTheme {
         mThemeId = themeId;
         mStyleId = styleId;
     }
+
+    private static KeyboardTheme searchKeyboardTheme(final int themeId) {
+        // TODO: This search algorithm isn't optimal if there are many themes.
+        for (final KeyboardTheme theme : KEYBOARD_THEMES) {
+            if (theme.mThemeId == themeId) {
+                return theme;
+            }
+        }
+        return null;
+    }
+
+    public static KeyboardTheme getDefaultKeyboardTheme() {
+        return searchKeyboardTheme(DEFAULT_THEME_ID);
+    }
+
+    public static KeyboardTheme getKeyboardTheme(final SharedPreferences prefs) {
+        final String themeIdString = prefs.getString(Settings.PREF_KEYBOARD_LAYOUT, null);
+        if (themeIdString == null) {
+            return getDefaultKeyboardTheme();
+        }
+        try {
+            final int themeId = Integer.parseInt(themeIdString);
+            final KeyboardTheme theme = searchKeyboardTheme(themeId);
+            if (theme != null) {
+                return theme;
+            }
+            Log.w(TAG, "Unknown keyboard theme in preference: " + themeIdString);
+        } catch (final NumberFormatException e) {
+            Log.w(TAG, "Illegal keyboard theme in preference: " + themeIdString);
+        }
+        // Reset preference to default value.
+        final String defaultThemeIdString = Integer.toString(DEFAULT_THEME_ID);
+        prefs.edit().putString(Settings.PREF_KEYBOARD_LAYOUT, defaultThemeIdString).apply();
+        return getDefaultKeyboardTheme();
+    }
 }
diff --git a/java/src/com/android/inputmethod/latin/settings/Settings.java b/java/src/com/android/inputmethod/latin/settings/Settings.java
index 4cb02284a..353b7463d 100644
--- a/java/src/com/android/inputmethod/latin/settings/Settings.java
+++ b/java/src/com/android/inputmethod/latin/settings/Settings.java
@@ -23,7 +23,6 @@ import android.content.res.Resources;
 import android.preference.PreferenceManager;
 import android.util.Log;
 
-import com.android.inputmethod.keyboard.KeyboardTheme;
 import com.android.inputmethod.latin.AudioAndHapticFeedbackManager;
 import com.android.inputmethod.latin.InputAttributes;
 import com.android.inputmethod.latin.R;
@@ -270,42 +269,6 @@ public final class Settings implements SharedPreferences.OnSharedPreferenceChang
         return prefs.getBoolean(PREF_SHOW_LANGUAGE_SWITCH_KEY, true);
     }
 
-    public static int readKeyboardThemeIndex(final SharedPreferences prefs, final Resources res) {
-        final int defaultThemeIndex = readDefaultKeyboardThemeIndex(res);
-        final String themeIndexString = prefs.getString(PREF_KEYBOARD_LAYOUT, null);
-        if (themeIndexString == null) {
-            return defaultThemeIndex;
-        }
-        try {
-            return Integer.parseInt(themeIndexString);
-        } catch (final NumberFormatException e) {
-            // Format error, returns default keyboard theme index.
-            Log.e(TAG, "Illegal keyboard theme in preference: " + themeIndexString + ", default to "
-                    + defaultThemeIndex, e);
-        }
-        return defaultThemeIndex;
-    }
-
-    private static int readDefaultKeyboardThemeIndex(final Resources res) {
-        final String defaultThemeIndexString = res.getString(
-                R.string.config_default_keyboard_theme_index);
-        try {
-            return Integer.parseInt(defaultThemeIndexString);
-        } catch (final NumberFormatException e) {
-            final int defaultThemeIndex = KeyboardTheme.DEFAULT_THEME_INDEX;
-            Log.e(TAG, "Corrupted default keyoard theme in resource: " + defaultThemeIndexString
-                    + ", default to " + defaultThemeIndex, e);
-            return defaultThemeIndex;
-        }
-    }
-
-    public static int resetAndGetDefaultKeyboardThemeIndex(final SharedPreferences prefs,
-            final Resources res) {
-        final int defaultThemeIndex = readDefaultKeyboardThemeIndex(res);
-        prefs.edit().putString(PREF_KEYBOARD_LAYOUT, Integer.toString(defaultThemeIndex)).apply();
-        return defaultThemeIndex;
-    }
-
     public static String readPrefAdditionalSubtypes(final SharedPreferences prefs,
             final Resources res) {
         final String predefinedPrefSubtypes = AdditionalSubtypeUtils.createPrefSubtypes(