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/*
* Copyright (C) 2008 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 "KeyLayoutMap"
#include <stdlib.h>
#include <android/keycodes.h>
#include <ui/Keyboard.h>
#include <ui/KeyLayoutMap.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
// Enables debug output for mapping.
#define DEBUG_MAPPING 0
namespace android {
static const char* WHITESPACE = " \t\r";
// --- KeyLayoutMap ---
KeyLayoutMap::KeyLayoutMap() {
}
KeyLayoutMap::~KeyLayoutMap() {
}
status_t KeyLayoutMap::load(const String8& filename, KeyLayoutMap** outMap) {
*outMap = NULL;
Tokenizer* tokenizer;
status_t status = Tokenizer::open(filename, &tokenizer);
if (status) {
LOGE("Error %d opening key layout map file %s.", status, filename.string());
} else {
KeyLayoutMap* map = new KeyLayoutMap();
if (!map) {
LOGE("Error allocating key layout 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 layout 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;
}
status_t KeyLayoutMap::map(int32_t scanCode, int32_t* keyCode, uint32_t* flags) const {
ssize_t index = mKeys.indexOfKey(scanCode);
if (index < 0) {
#if DEBUG_MAPPING
LOGD("map: scanCode=%d ~ Failed.", scanCode);
#endif
*keyCode = AKEYCODE_UNKNOWN;
*flags = 0;
return NAME_NOT_FOUND;
}
const Key& k = mKeys.valueAt(index);
*keyCode = k.keyCode;
*flags = k.flags;
#if DEBUG_MAPPING
LOGD("map: scanCode=%d ~ Result keyCode=%d, flags=0x%08x.", scanCode, *keyCode, *flags);
#endif
return NO_ERROR;
}
status_t KeyLayoutMap::findScanCodes(int32_t keyCode, Vector<int32_t>* outScanCodes) const {
const size_t N = mKeys.size();
for (size_t i=0; i<N; i++) {
if (mKeys.valueAt(i).keyCode == keyCode) {
outScanCodes->add(mKeys.keyAt(i));
}
}
return NO_ERROR;
}
// --- KeyLayoutMap::Parser ---
KeyLayoutMap::Parser::Parser(KeyLayoutMap* map, Tokenizer* tokenizer) :
mMap(map), mTokenizer(tokenizer) {
}
KeyLayoutMap::Parser::~Parser() {
}
status_t KeyLayoutMap::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() != '#') {
String8 keywordToken = mTokenizer->nextToken(WHITESPACE);
if (keywordToken == "key") {
mTokenizer->skipDelimiters(WHITESPACE);
status_t status = parseKey();
if (status) return status;
} else {
LOGE("%s: Expected keyword, got '%s'.", mTokenizer->getLocation().string(),
keywordToken.string());
return BAD_VALUE;
}
mTokenizer->skipDelimiters(WHITESPACE);
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;
}
status_t KeyLayoutMap::Parser::parseKey() {
String8 scanCodeToken = mTokenizer->nextToken(WHITESPACE);
char* end;
int32_t scanCode = int32_t(strtol(scanCodeToken.string(), &end, 0));
if (*end) {
LOGE("%s: Expected scan code number, got '%s'.", mTokenizer->getLocation().string(),
scanCodeToken.string());
return BAD_VALUE;
}
if (mMap->mKeys.indexOfKey(scanCode) >= 0) {
LOGE("%s: Duplicate entry for scan code '%s'.", mTokenizer->getLocation().string(),
scanCodeToken.string());
return BAD_VALUE;
}
mTokenizer->skipDelimiters(WHITESPACE);
String8 keyCodeToken = mTokenizer->nextToken(WHITESPACE);
int32_t keyCode = getKeyCodeByLabel(keyCodeToken.string());
if (!keyCode) {
LOGE("%s: Expected key code label, got '%s'.", mTokenizer->getLocation().string(),
keyCodeToken.string());
return BAD_VALUE;
}
uint32_t flags = 0;
for (;;) {
mTokenizer->skipDelimiters(WHITESPACE);
if (mTokenizer->isEol()) break;
String8 flagToken = mTokenizer->nextToken(WHITESPACE);
uint32_t flag = getKeyFlagByLabel(flagToken.string());
if (!flag) {
LOGE("%s: Expected flag label, got '%s'.", mTokenizer->getLocation().string(),
flagToken.string());
return BAD_VALUE;
}
if (flags & flag) {
LOGE("%s: Duplicate flag '%s'.", mTokenizer->getLocation().string(),
flagToken.string());
return BAD_VALUE;
}
flags |= flag;
}
#if DEBUG_PARSER
LOGD("Parsed key: scanCode=%d, keyCode=%d, flags=0x%08x.", scanCode, keyCode, flags);
#endif
Key key;
key.keyCode = keyCode;
key.flags = flags;
mMap->mKeys.add(scanCode, key);
return NO_ERROR;
}
};