108 lines
4.0 KiB
Java
108 lines
4.0 KiB
Java
/*
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* Copyright (C) 2013 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 com.android.inputmethod.latin.common.Constants;
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import com.android.inputmethod.latin.common.StringUtils;
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import android.text.TextUtils;
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/**
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* The string parser of codesArray specification for <GridRows />. The attribute codesArray is an
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* array of string.
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* Each element of the array defines a key label by specifying a code point as a hexadecimal string.
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* A key label may consist of multiple code points separated by comma.
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* Each element of the array optionally can have an output text definition after vertical bar
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* marker. An output text may consist of multiple code points separated by comma.
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* The format of the codesArray element should be:
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* <pre>
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* label1[,label2]*(|outputText1[,outputText2]*(|minSupportSdkVersion)?)?
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* </pre>
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*/
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// TODO: Write unit tests for this class.
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public final class CodesArrayParser {
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// Constants for parsing.
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private static final char COMMA = Constants.CODE_COMMA;
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private static final String COMMA_REGEX = StringUtils.newSingleCodePointString(COMMA);
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private static final String VERTICAL_BAR_REGEX = // "\\|"
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new String(new char[] { Constants.CODE_BACKSLASH, Constants.CODE_VERTICAL_BAR });
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private static final int BASE_HEX = 16;
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private CodesArrayParser() {
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// This utility class is not publicly instantiable.
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}
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private static String getLabelSpec(final String codesArraySpec) {
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final String[] strs = codesArraySpec.split(VERTICAL_BAR_REGEX, -1);
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if (strs.length <= 1) {
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return codesArraySpec;
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}
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return strs[0];
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}
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public static String parseLabel(final String codesArraySpec) {
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final String labelSpec = getLabelSpec(codesArraySpec);
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final StringBuilder sb = new StringBuilder();
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for (final String codeInHex : labelSpec.split(COMMA_REGEX)) {
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final int codePoint = Integer.parseInt(codeInHex, BASE_HEX);
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sb.appendCodePoint(codePoint);
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}
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return sb.toString();
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}
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private static String getCodeSpec(final String codesArraySpec) {
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final String[] strs = codesArraySpec.split(VERTICAL_BAR_REGEX, -1);
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if (strs.length <= 1) {
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return codesArraySpec;
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}
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return TextUtils.isEmpty(strs[1]) ? strs[0] : strs[1];
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}
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public static int getMinSupportSdkVersion(final String codesArraySpec) {
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final String[] strs = codesArraySpec.split(VERTICAL_BAR_REGEX, -1);
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if (strs.length <= 2) {
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return 0;
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}
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try {
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return Integer.parseInt(strs[2]);
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} catch (NumberFormatException e) {
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return 0;
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}
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}
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public static int parseCode(final String codesArraySpec) {
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final String codeSpec = getCodeSpec(codesArraySpec);
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if (codeSpec.indexOf(COMMA) < 0) {
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return Integer.parseInt(codeSpec, BASE_HEX);
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}
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return Constants.CODE_OUTPUT_TEXT;
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}
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public static String parseOutputText(final String codesArraySpec) {
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final String codeSpec = getCodeSpec(codesArraySpec);
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if (codeSpec.indexOf(COMMA) < 0) {
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return null;
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}
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final StringBuilder sb = new StringBuilder();
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for (final String codeInHex : codeSpec.split(COMMA_REGEX)) {
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final int codePoint = Integer.parseInt(codeInHex, BASE_HEX);
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sb.appendCodePoint(codePoint);
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}
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return sb.toString();
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}
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}
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