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Read shared prefs from the dictionary pack.

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Bug: 5095140
Change-Id: I227fbd95d8a0330b6dede6de99fde3a5a715fe2d
This commit is contained in:
Jean Chalard 2011-08-11 22:10:16 +09:00
parent 7fca6a5357
commit 86e517fe4a
1 changed files with 59 additions and 4 deletions
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63
java/src/com/android/inputmethod/latin/BinaryDictionaryGetter.java
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@ -17,6 +17,8 @@
package com.android.inputmethod.latin;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.pm.PackageManager.NameNotFoundException;
import android.content.res.AssetFileDescriptor;
import android.content.res.Resources;
import android.util.Log;
@ -39,9 +41,26 @@ class BinaryDictionaryGetter {
*/
private static final String TAG = BinaryDictionaryGetter.class.getSimpleName();
/**
* Name of the common preferences name to know which word list are on and which are off.
*/
private static final String COMMON_PREFERENCES_NAME = "LatinImeDictPrefs";
// Prevents this from being instantiated
private BinaryDictionaryGetter() {}
/**
* Returns whether we may want to use this character as part of a file name.
*
* This basically only accepts ascii letters and numbers, and rejects everything else.
*/
private static boolean isFileNameCharacter(int codePoint) {
if (codePoint >= 0x30 && codePoint <= 0x39) return true; // Digit
if (codePoint >= 0x41 && codePoint <= 0x5A) return true; // Uppercase
if (codePoint >= 0x61 && codePoint <= 0x7A) return true; // Lowercase
return codePoint == '_'; // Underscore
}
/**
* Escapes a string for any characters that may be suspicious for a file or directory name.
*
@ -50,17 +69,35 @@ class BinaryDictionaryGetter {
* we cannot allow here)
*/
// TODO: create a unit test for this method
private static String replaceFileNameDangerousCharacters(String name) {
private static String replaceFileNameDangerousCharacters(final String name) {
// This assumes '%' is fully available as a non-separator, normal
// character in a file name. This is probably true for all file systems.
final StringBuilder sb = new StringBuilder();
for (int i = 0; i < name.length(); ++i) {
final int codePoint = name.codePointAt(i);
if (Character.isLetterOrDigit(codePoint) || '_' == codePoint) {
if (isFileNameCharacter(codePoint)) {
sb.appendCodePoint(codePoint);
} else {
sb.append('%');
sb.append(Integer.toHexString(codePoint));
// 6 digits - unicode is limited to 21 bits
sb.append(String.format((Locale)null, "%%%1$06x", codePoint));
}
}
return sb.toString();
}
/**
* Reverse escaping done by replaceFileNameDangerousCharacters.
*/
private static String getWordListIdFromFileName(final String fname) {
final StringBuilder sb = new StringBuilder();
for (int i = 0; i < fname.length(); ++i) {
final int codePoint = fname.codePointAt(i);
if ('%' != codePoint) {
sb.appendCodePoint(codePoint);
} else {
final int encodedCodePoint = Integer.parseInt(fname.substring(i + 1, i + 7), 16);
i += 6;
sb.appendCodePoint(encodedCodePoint);
}
}
return sb.toString();
@ -132,10 +169,28 @@ class BinaryDictionaryGetter {
final Context context) {
final String directoryName = getCacheDirectoryForLocale(locale, context);
final File[] cacheFiles = new File(directoryName).listFiles();
// TODO: Never return null. Fallback on the built-in dictionary, and if that's
// not present or disabled, then return an empty list.
if (null == cacheFiles) return null;
final SharedPreferences dictPackSettings;
try {
final String dictPackName = context.getString(R.string.dictionary_pack_package_name);
final Context dictPackContext = context.createPackageContext(dictPackName, 0);
dictPackSettings = dictPackContext.getSharedPreferences(COMMON_PREFERENCES_NAME,
Context.MODE_WORLD_READABLE | Context.MODE_MULTI_PROCESS);
} catch (NameNotFoundException e) {
// The dictionary pack is not installed...
// TODO: fallback on the built-in dict, see the TODO above
Log.e(TAG, "Could not find a dictionary pack");
return null;
}
final ArrayList<AssetFileAddress> fileList = new ArrayList<AssetFileAddress>();
for (File f : cacheFiles) {
final String wordListId = getWordListIdFromFileName(f.getName());
final boolean isActive = dictPackSettings.getBoolean(wordListId, true);
if (!isActive) continue;
if (f.canRead()) {
fileList.add(AssetFileAddress.makeFromFileName(f.getPath()));
} else {