fae8d60ee9
The dictionary filename used to be passed directly to Latin IME. This change implements, on the part of Latin IME, the passing of them as an id that should then be passed through openAssetFileDescriptor. Bug: 5095140 Change-Id: I7d1e9d57c19f0645045368f68681680f238189fc
95 lines
3.7 KiB
Java
95 lines
3.7 KiB
Java
/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not
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* use this file except in compliance with the License. You may obtain a copy of
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* the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations under
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* the License.
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*/
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package com.android.inputmethod.latin;
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import android.content.Context;
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import android.content.res.AssetFileDescriptor;
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import android.content.res.Resources;
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import android.util.Log;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.util.Arrays;
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import java.util.List;
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import java.util.Locale;
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/**
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* Helper class to get the address of a mmap'able dictionary file.
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*/
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class BinaryDictionaryGetter {
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/**
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* Used for Log actions from this class
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*/
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private static final String TAG = BinaryDictionaryGetter.class.getSimpleName();
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// Prevents this from being instantiated
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private BinaryDictionaryGetter() {}
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/**
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* Returns a file address from a resource, or null if it cannot be opened.
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*/
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private static AssetFileAddress loadFallbackResource(final Context context,
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final int fallbackResId, final Locale locale) {
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final Resources res = context.getResources();
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final Locale savedLocale = Utils.setSystemLocale(res, locale);
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final AssetFileDescriptor afd = res.openRawResourceFd(fallbackResId);
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Utils.setSystemLocale(res, savedLocale);
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if (afd == null) {
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Log.e(TAG, "Found the resource but cannot read it. Is it compressed? resId="
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+ fallbackResId);
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return null;
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}
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return AssetFileAddress.makeFromFileNameAndOffset(
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context.getApplicationInfo().sourceDir, afd.getStartOffset(), afd.getLength());
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}
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/**
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* Returns a list of file addresses for a given locale, trying relevant methods in order.
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*
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* Tries to get binary dictionaries from various sources, in order:
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* - Uses a content provider to get a public dictionary set, as per the protocol described
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* in BinaryDictionaryFileDumper.
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* If that fails:
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* - Gets a file name from the fallback resource passed as an argument.
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* If that fails:
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* - Returns null.
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* @return The address of a valid file, or null.
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*/
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public static List<AssetFileAddress> getDictionaryFiles(Locale locale, Context context,
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int fallbackResId) {
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try {
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List<AssetFileAddress> listFromContentProvider =
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BinaryDictionaryFileDumper.getDictSetFromContentProvider(locale, context);
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if (null != listFromContentProvider) {
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return listFromContentProvider;
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}
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// If the list is null, fall through and return the fallback
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} catch (FileNotFoundException e) {
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Log.e(TAG, "Unable to create dictionary file from provider for locale "
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+ locale.toString() + ": falling back to internal dictionary");
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} catch (IOException e) {
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Log.e(TAG, "Unable to read source data for locale "
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+ locale.toString() + ": falling back to internal dictionary");
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}
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final AssetFileAddress fallbackAsset = loadFallbackResource(context, fallbackResId,
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locale);
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if (null == fallbackAsset) return null;
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return Arrays.asList(fallbackAsset);
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}
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}
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