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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.kelar.inputmethod.keyboard.internal;
import android.content.Context;
import android.content.res.Resources;
import android.text.TextUtils;
import org.kelar.inputmethod.annotations.UsedForTesting;
import org.kelar.inputmethod.latin.common.Constants;
import org.kelar.inputmethod.latin.utils.RunInLocale;
import org.kelar.inputmethod.latin.utils.SubtypeLocaleUtils;
import java.util.Locale;
// TODO: Make this an immutable class.
public final class KeyboardTextsSet {
public static final String PREFIX_TEXT = "!text/";
private static final String PREFIX_RESOURCE = "!string/";
public static final String SWITCH_TO_ALPHA_KEY_LABEL = "keylabel_to_alpha";
private static final char BACKSLASH = Constants.CODE_BACKSLASH;
private static final int MAX_REFERENCE_INDIRECTION = 10;
private Resources mResources;
private Locale mResourceLocale;
private String mResourcePackageName;
private String[] mTextsTable;
public void setLocale(final Locale locale, final Context context) {
final Resources res = context.getResources();
// Null means the current system locale.
final String resourcePackageName = res.getResourcePackageName(
context.getApplicationInfo().labelRes);
setLocale(locale, res, resourcePackageName);
}
@UsedForTesting
public void setLocale(final Locale locale, final Resources res,
final String resourcePackageName) {
mResources = res;
// Null means the current system locale.
mResourceLocale = SubtypeLocaleUtils.NO_LANGUAGE.equals(locale.toString()) ? null : locale;
mResourcePackageName = resourcePackageName;
mTextsTable = KeyboardTextsTable.getTextsTable(locale);
}
public String getText(final String name) {
return KeyboardTextsTable.getText(name, mTextsTable);
}
private static int searchTextNameEnd(final String text, final int start) {
final int size = text.length();
for (int pos = start; pos < size; pos++) {
final char c = text.charAt(pos);
// Label name should be consisted of [a-zA-Z_0-9].
if ((c >= 'a' && c <= 'z') || c == '_' || (c >= '0' && c <= '9')) {
continue;
}
return pos;
}
return size;
}
// TODO: Resolve text reference when creating {@link KeyboardTextsTable} class.
public String resolveTextReference(final String rawText) {
if (TextUtils.isEmpty(rawText)) {
return null;
}
int level = 0;
String text = rawText;
StringBuilder sb;
do {
level++;
if (level >= MAX_REFERENCE_INDIRECTION) {
throw new RuntimeException("Too many " + PREFIX_TEXT + " or " + PREFIX_RESOURCE +
" reference indirection: " + text);
}
final int prefixLength = PREFIX_TEXT.length();
final int size = text.length();
if (size < prefixLength) {
break;
}
sb = null;
for (int pos = 0; pos < size; pos++) {
final char c = text.charAt(pos);
if (text.startsWith(PREFIX_TEXT, pos)) {
if (sb == null) {
sb = new StringBuilder(text.substring(0, pos));
}
pos = expandReference(text, pos, PREFIX_TEXT, sb);
} else if (text.startsWith(PREFIX_RESOURCE, pos)) {
if (sb == null) {
sb = new StringBuilder(text.substring(0, pos));
}
pos = expandReference(text, pos, PREFIX_RESOURCE, sb);
} else if (c == BACKSLASH) {
if (sb != null) {
// Append both escape character and escaped character.
sb.append(text.substring(pos, Math.min(pos + 2, size)));
}
pos++;
} else if (sb != null) {
sb.append(c);
}
}
if (sb != null) {
text = sb.toString();
}
} while (sb != null);
return TextUtils.isEmpty(text) ? null : text;
}
private int expandReference(final String text, final int pos, final String prefix,
final StringBuilder sb) {
final int prefixLength = prefix.length();
final int end = searchTextNameEnd(text, pos + prefixLength);
final String name = text.substring(pos + prefixLength, end);
if (prefix.equals(PREFIX_TEXT)) {
sb.append(getText(name));
} else { // PREFIX_RESOURCE
final String resourcePackageName = mResourcePackageName;
final RunInLocale<String> getTextJob = new RunInLocale<String>() {
@Override
protected String job(final Resources res) {
final int resId = res.getIdentifier(name, "string", resourcePackageName);
return res.getString(resId);
}
};
sb.append(getTextJob.runInLocale(mResources, mResourceLocale));
}
return end - 1;
}
}
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