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* Copyright (C) 2010 The Android Open Source Project
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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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* http://www.apache.org/licenses/LICENSE-2.0
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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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#define LOG_TAG "VirtualKeyMap"
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#include <androidfw/VirtualKeyMap.h>
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#include <utils/Log.h>
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#include <utils/Errors.h>
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#include <utils/Tokenizer.h>
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#include <utils/Timers.h>
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// Enables debug output for the parser.
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#define DEBUG_PARSER 0
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// Enables debug output for parser performance.
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#define DEBUG_PARSER_PERFORMANCE 0
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static const char* WHITESPACE = " \t\r";
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static const char* WHITESPACE_OR_FIELD_DELIMITER = " \t\r:";
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// --- VirtualKeyMap ---
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VirtualKeyMap::VirtualKeyMap() {
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VirtualKeyMap::~VirtualKeyMap() {
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status_t VirtualKeyMap::load(const String8& filename, VirtualKeyMap** outMap) {
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status_t status = Tokenizer::open(filename, &tokenizer);
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ALOGE("Error %d opening virtual key map file %s.", status, filename.string());
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VirtualKeyMap* map = new VirtualKeyMap();
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ALOGE("Error allocating virtual key map.");
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#if DEBUG_PARSER_PERFORMANCE
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nsecs_t startTime = systemTime(SYSTEM_TIME_MONOTONIC);
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Parser parser(map, tokenizer);
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status = parser.parse();
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#if DEBUG_PARSER_PERFORMANCE
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nsecs_t elapsedTime = systemTime(SYSTEM_TIME_MONOTONIC) - startTime;
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ALOGD("Parsed key character map file '%s' %d lines in %0.3fms.",
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tokenizer->getFilename().string(), tokenizer->getLineNumber(),
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elapsedTime / 1000000.0);
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// --- VirtualKeyMap::Parser ---
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VirtualKeyMap::Parser::Parser(VirtualKeyMap* map, Tokenizer* tokenizer) :
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mMap(map), mTokenizer(tokenizer) {
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VirtualKeyMap::Parser::~Parser() {
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status_t VirtualKeyMap::Parser::parse() {
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while (!mTokenizer->isEof()) {
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ALOGD("Parsing %s: '%s'.", mTokenizer->getLocation().string(),
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mTokenizer->peekRemainderOfLine().string());
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mTokenizer->skipDelimiters(WHITESPACE);
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if (!mTokenizer->isEol() && mTokenizer->peekChar() != '#') {
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// Multiple keys can appear on one line or they can be broken up across multiple lines.
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String8 token = mTokenizer->nextToken(WHITESPACE_OR_FIELD_DELIMITER);
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if (token != "0x01") {
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ALOGE("%s: Unknown virtual key type, expected 0x01.",
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mTokenizer->getLocation().string());
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VirtualKeyDefinition defn;
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bool success = parseNextIntField(&defn.scanCode)
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&& parseNextIntField(&defn.centerX)
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&& parseNextIntField(&defn.centerY)
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&& parseNextIntField(&defn.width)
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&& parseNextIntField(&defn.height);
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ALOGE("%s: Expected 5 colon-delimited integers in virtual key definition.",
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mTokenizer->getLocation().string());
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ALOGD("Parsed virtual key: scanCode=%d, centerX=%d, centerY=%d, "
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"width=%d, height=%d",
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defn.scanCode, defn.centerX, defn.centerY, defn.width, defn.height);
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mMap->mVirtualKeys.push(defn);
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} while (consumeFieldDelimiterAndSkipWhitespace());
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if (!mTokenizer->isEol()) {
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ALOGE("%s: Expected end of line, got '%s'.",
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mTokenizer->getLocation().string(),
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mTokenizer->peekRemainderOfLine().string());
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mTokenizer->nextLine();
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bool VirtualKeyMap::Parser::consumeFieldDelimiterAndSkipWhitespace() {
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mTokenizer->skipDelimiters(WHITESPACE);
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if (mTokenizer->peekChar() == ':') {
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mTokenizer->nextChar();
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mTokenizer->skipDelimiters(WHITESPACE);
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bool VirtualKeyMap::Parser::parseNextIntField(int32_t* outValue) {
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if (!consumeFieldDelimiterAndSkipWhitespace()) {
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String8 token = mTokenizer->nextToken(WHITESPACE_OR_FIELD_DELIMITER);
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*outValue = strtol(token.string(), &end, 0);
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if (token.isEmpty() || *end != '\0') {
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ALOGE("Expected an integer, got '%s'.", token.string());
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} // namespace android