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