1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/widget/gonk/libui/VirtualKeyMap.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,171 @@
1.4 +/*
1.5 + * Copyright (C) 2010 The Android Open Source Project
1.6 + *
1.7 + * Licensed under the Apache License, Version 2.0 (the "License");
1.8 + * you may not use this file except in compliance with the License.
1.9 + * You may obtain a copy of the License at
1.10 + *
1.11 + * http://www.apache.org/licenses/LICENSE-2.0
1.12 + *
1.13 + * Unless required by applicable law or agreed to in writing, software
1.14 + * distributed under the License is distributed on an "AS IS" BASIS,
1.15 + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
1.16 + * See the License for the specific language governing permissions and
1.17 + * limitations under the License.
1.18 + */
1.19 +
1.20 +#define LOG_TAG "VirtualKeyMap"
1.21 +#include "cutils_log.h"
1.22 +
1.23 +#include <stdlib.h>
1.24 +#include <string.h>
1.25 +#include "VirtualKeyMap.h"
1.26 +#include <utils/Errors.h>
1.27 +#include "Tokenizer.h"
1.28 +#include <utils/Timers.h>
1.29 +
1.30 +// Enables debug output for the parser.
1.31 +#define DEBUG_PARSER 0
1.32 +
1.33 +// Enables debug output for parser performance.
1.34 +#define DEBUG_PARSER_PERFORMANCE 0
1.35 +
1.36 +
1.37 +namespace android {
1.38 +
1.39 +static const char* WHITESPACE = " \t\r";
1.40 +static const char* WHITESPACE_OR_FIELD_DELIMITER = " \t\r:";
1.41 +
1.42 +
1.43 +// --- VirtualKeyMap ---
1.44 +
1.45 +VirtualKeyMap::VirtualKeyMap() {
1.46 +}
1.47 +
1.48 +VirtualKeyMap::~VirtualKeyMap() {
1.49 +}
1.50 +
1.51 +status_t VirtualKeyMap::load(const String8& filename, VirtualKeyMap** outMap) {
1.52 + *outMap = NULL;
1.53 +
1.54 + Tokenizer* tokenizer;
1.55 + status_t status = Tokenizer::open(filename, &tokenizer);
1.56 + if (status) {
1.57 + ALOGE("Error %d opening virtual key map file %s.", status, filename.string());
1.58 + } else {
1.59 + VirtualKeyMap* map = new VirtualKeyMap();
1.60 + if (!map) {
1.61 + ALOGE("Error allocating virtual key map.");
1.62 + status = NO_MEMORY;
1.63 + } else {
1.64 +#if DEBUG_PARSER_PERFORMANCE
1.65 + nsecs_t startTime = systemTime(SYSTEM_TIME_MONOTONIC);
1.66 +#endif
1.67 + Parser parser(map, tokenizer);
1.68 + status = parser.parse();
1.69 +#if DEBUG_PARSER_PERFORMANCE
1.70 + nsecs_t elapsedTime = systemTime(SYSTEM_TIME_MONOTONIC) - startTime;
1.71 + ALOGD("Parsed key character map file '%s' %d lines in %0.3fms.",
1.72 + tokenizer->getFilename().string(), tokenizer->getLineNumber(),
1.73 + elapsedTime / 1000000.0);
1.74 +#endif
1.75 + if (status) {
1.76 + delete map;
1.77 + } else {
1.78 + *outMap = map;
1.79 + }
1.80 + }
1.81 + delete tokenizer;
1.82 + }
1.83 + return status;
1.84 +}
1.85 +
1.86 +
1.87 +// --- VirtualKeyMap::Parser ---
1.88 +
1.89 +VirtualKeyMap::Parser::Parser(VirtualKeyMap* map, Tokenizer* tokenizer) :
1.90 + mMap(map), mTokenizer(tokenizer) {
1.91 +}
1.92 +
1.93 +VirtualKeyMap::Parser::~Parser() {
1.94 +}
1.95 +
1.96 +status_t VirtualKeyMap::Parser::parse() {
1.97 + while (!mTokenizer->isEof()) {
1.98 +#if DEBUG_PARSER
1.99 + ALOGD("Parsing %s: '%s'.", mTokenizer->getLocation().string(),
1.100 + mTokenizer->peekRemainderOfLine().string());
1.101 +#endif
1.102 +
1.103 + mTokenizer->skipDelimiters(WHITESPACE);
1.104 +
1.105 + if (!mTokenizer->isEol() && mTokenizer->peekChar() != '#') {
1.106 + // Multiple keys can appear on one line or they can be broken up across multiple lines.
1.107 + do {
1.108 + String8 token = mTokenizer->nextToken(WHITESPACE_OR_FIELD_DELIMITER);
1.109 + if (token != "0x01") {
1.110 + ALOGE("%s: Unknown virtual key type, expected 0x01.",
1.111 + mTokenizer->getLocation().string());
1.112 + return BAD_VALUE;
1.113 + }
1.114 +
1.115 + VirtualKeyDefinition defn;
1.116 + bool success = parseNextIntField(&defn.scanCode)
1.117 + && parseNextIntField(&defn.centerX)
1.118 + && parseNextIntField(&defn.centerY)
1.119 + && parseNextIntField(&defn.width)
1.120 + && parseNextIntField(&defn.height);
1.121 + if (!success) {
1.122 + ALOGE("%s: Expected 5 colon-delimited integers in virtual key definition.",
1.123 + mTokenizer->getLocation().string());
1.124 + return BAD_VALUE;
1.125 + }
1.126 +
1.127 +#if DEBUG_PARSER
1.128 + ALOGD("Parsed virtual key: scanCode=%d, centerX=%d, centerY=%d, "
1.129 + "width=%d, height=%d",
1.130 + defn.scanCode, defn.centerX, defn.centerY, defn.width, defn.height);
1.131 +#endif
1.132 + mMap->mVirtualKeys.push(defn);
1.133 + } while (consumeFieldDelimiterAndSkipWhitespace());
1.134 +
1.135 + if (!mTokenizer->isEol()) {
1.136 + ALOGE("%s: Expected end of line, got '%s'.",
1.137 + mTokenizer->getLocation().string(),
1.138 + mTokenizer->peekRemainderOfLine().string());
1.139 + return BAD_VALUE;
1.140 + }
1.141 + }
1.142 +
1.143 + mTokenizer->nextLine();
1.144 + }
1.145 +
1.146 + return NO_ERROR;
1.147 +}
1.148 +
1.149 +bool VirtualKeyMap::Parser::consumeFieldDelimiterAndSkipWhitespace() {
1.150 + mTokenizer->skipDelimiters(WHITESPACE);
1.151 + if (mTokenizer->peekChar() == ':') {
1.152 + mTokenizer->nextChar();
1.153 + mTokenizer->skipDelimiters(WHITESPACE);
1.154 + return true;
1.155 + }
1.156 + return false;
1.157 +}
1.158 +
1.159 +bool VirtualKeyMap::Parser::parseNextIntField(int32_t* outValue) {
1.160 + if (!consumeFieldDelimiterAndSkipWhitespace()) {
1.161 + return false;
1.162 + }
1.163 +
1.164 + String8 token = mTokenizer->nextToken(WHITESPACE_OR_FIELD_DELIMITER);
1.165 + char* end;
1.166 + *outValue = strtol(token.string(), &end, 0);
1.167 + if (token.isEmpty() || *end != '\0') {
1.168 + ALOGE("Expected an integer, got '%s'.", token.string());
1.169 + return false;
1.170 + }
1.171 + return true;
1.172 +}
1.173 +
1.174 +} // namespace android
