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