| /* |
| * 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 "KeyCharacterMap" |
| |
| #include <stdlib.h> |
| #include <string.h> |
| #include <android/keycodes.h> |
| #include <androidfw/Keyboard.h> |
| #include <androidfw/KeyCharacterMap.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"; |
| static const char* WHITESPACE_OR_PROPERTY_DELIMITER = " \t\r,:"; |
| |
| struct Modifier { |
| const char* label; |
| int32_t metaState; |
| }; |
| static const Modifier modifiers[] = { |
| { "shift", AMETA_SHIFT_ON }, |
| { "lshift", AMETA_SHIFT_LEFT_ON }, |
| { "rshift", AMETA_SHIFT_RIGHT_ON }, |
| { "alt", AMETA_ALT_ON }, |
| { "lalt", AMETA_ALT_LEFT_ON }, |
| { "ralt", AMETA_ALT_RIGHT_ON }, |
| { "ctrl", AMETA_CTRL_ON }, |
| { "lctrl", AMETA_CTRL_LEFT_ON }, |
| { "rctrl", AMETA_CTRL_RIGHT_ON }, |
| { "meta", AMETA_META_ON }, |
| { "lmeta", AMETA_META_LEFT_ON }, |
| { "rmeta", AMETA_META_RIGHT_ON }, |
| { "sym", AMETA_SYM_ON }, |
| { "fn", AMETA_FUNCTION_ON }, |
| { "capslock", AMETA_CAPS_LOCK_ON }, |
| { "numlock", AMETA_NUM_LOCK_ON }, |
| { "scrolllock", AMETA_SCROLL_LOCK_ON }, |
| }; |
| |
| #if DEBUG_MAPPING |
| static String8 toString(const char16_t* chars, size_t numChars) { |
| String8 result; |
| for (size_t i = 0; i < numChars; i++) { |
| result.appendFormat(i == 0 ? "%d" : ", %d", chars[i]); |
| } |
| return result; |
| } |
| #endif |
| |
| |
| // --- KeyCharacterMap --- |
| |
| KeyCharacterMap::KeyCharacterMap() : |
| mType(KEYBOARD_TYPE_UNKNOWN) { |
| } |
| |
| KeyCharacterMap::~KeyCharacterMap() { |
| for (size_t i = 0; i < mKeys.size(); i++) { |
| Key* key = mKeys.editValueAt(i); |
| delete key; |
| } |
| } |
| |
| status_t KeyCharacterMap::load(const String8& filename, KeyCharacterMap** outMap) { |
| *outMap = NULL; |
| |
| Tokenizer* tokenizer; |
| status_t status = Tokenizer::open(filename, &tokenizer); |
| if (status) { |
| ALOGE("Error %d opening key character map file %s.", status, filename.string()); |
| } else { |
| KeyCharacterMap* map = new KeyCharacterMap(); |
| if (!map) { |
| ALOGE("Error allocating key character 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; |
| ALOGD("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; |
| } |
| |
| int32_t KeyCharacterMap::getKeyboardType() const { |
| return mType; |
| } |
| |
| char16_t KeyCharacterMap::getDisplayLabel(int32_t keyCode) const { |
| char16_t result = 0; |
| const Key* key; |
| if (getKey(keyCode, &key)) { |
| result = key->label; |
| } |
| #if DEBUG_MAPPING |
| ALOGD("getDisplayLabel: keyCode=%d ~ Result %d.", keyCode, result); |
| #endif |
| return result; |
| } |
| |
| char16_t KeyCharacterMap::getNumber(int32_t keyCode) const { |
| char16_t result = 0; |
| const Key* key; |
| if (getKey(keyCode, &key)) { |
| result = key->number; |
| } |
| #if DEBUG_MAPPING |
| ALOGD("getNumber: keyCode=%d ~ Result %d.", keyCode, result); |
| #endif |
| return result; |
| } |
| |
| char16_t KeyCharacterMap::getCharacter(int32_t keyCode, int32_t metaState) const { |
| char16_t result = 0; |
| const Key* key; |
| const Behavior* behavior; |
| if (getKeyBehavior(keyCode, metaState, &key, &behavior)) { |
| result = behavior->character; |
| } |
| #if DEBUG_MAPPING |
| ALOGD("getCharacter: keyCode=%d, metaState=0x%08x ~ Result %d.", keyCode, metaState, result); |
| #endif |
| return result; |
| } |
| |
| bool KeyCharacterMap::getFallbackAction(int32_t keyCode, int32_t metaState, |
| FallbackAction* outFallbackAction) const { |
| outFallbackAction->keyCode = 0; |
| outFallbackAction->metaState = 0; |
| |
| bool result = false; |
| const Key* key; |
| const Behavior* behavior; |
| if (getKeyBehavior(keyCode, metaState, &key, &behavior)) { |
| if (behavior->fallbackKeyCode) { |
| outFallbackAction->keyCode = behavior->fallbackKeyCode; |
| outFallbackAction->metaState = metaState & ~behavior->metaState; |
| result = true; |
| } |
| } |
| #if DEBUG_MAPPING |
| ALOGD("getFallbackKeyCode: keyCode=%d, metaState=0x%08x ~ Result %s, " |
| "fallback keyCode=%d, fallback metaState=0x%08x.", |
| keyCode, metaState, result ? "true" : "false", |
| outFallbackAction->keyCode, outFallbackAction->metaState); |
| #endif |
| return result; |
| } |
| |
| char16_t KeyCharacterMap::getMatch(int32_t keyCode, const char16_t* chars, size_t numChars, |
| int32_t metaState) const { |
| char16_t result = 0; |
| const Key* key; |
| if (getKey(keyCode, &key)) { |
| // Try to find the most general behavior that maps to this character. |
| // For example, the base key behavior will usually be last in the list. |
| // However, if we find a perfect meta state match for one behavior then use that one. |
| for (const Behavior* behavior = key->firstBehavior; behavior; behavior = behavior->next) { |
| if (behavior->character) { |
| for (size_t i = 0; i < numChars; i++) { |
| if (behavior->character == chars[i]) { |
| result = behavior->character; |
| if ((behavior->metaState & metaState) == behavior->metaState) { |
| goto ExactMatch; |
| } |
| break; |
| } |
| } |
| } |
| } |
| ExactMatch: ; |
| } |
| #if DEBUG_MAPPING |
| ALOGD("getMatch: keyCode=%d, chars=[%s], metaState=0x%08x ~ Result %d.", |
| keyCode, toString(chars, numChars).string(), metaState, result); |
| #endif |
| return result; |
| } |
| |
| bool KeyCharacterMap::getEvents(int32_t deviceId, const char16_t* chars, size_t numChars, |
| Vector<KeyEvent>& outEvents) const { |
| nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC); |
| |
| for (size_t i = 0; i < numChars; i++) { |
| int32_t keyCode, metaState; |
| char16_t ch = chars[i]; |
| if (!findKey(ch, &keyCode, &metaState)) { |
| #if DEBUG_MAPPING |
| ALOGD("getEvents: deviceId=%d, chars=[%s] ~ Failed to find mapping for character %d.", |
| deviceId, toString(chars, numChars).string(), ch); |
| #endif |
| return false; |
| } |
| |
| int32_t currentMetaState = 0; |
| addMetaKeys(outEvents, deviceId, metaState, true, now, ¤tMetaState); |
| addKey(outEvents, deviceId, keyCode, currentMetaState, true, now); |
| addKey(outEvents, deviceId, keyCode, currentMetaState, false, now); |
| addMetaKeys(outEvents, deviceId, metaState, false, now, ¤tMetaState); |
| } |
| #if DEBUG_MAPPING |
| ALOGD("getEvents: deviceId=%d, chars=[%s] ~ Generated %d events.", |
| deviceId, toString(chars, numChars).string(), int32_t(outEvents.size())); |
| for (size_t i = 0; i < outEvents.size(); i++) { |
| ALOGD(" Key: keyCode=%d, metaState=0x%08x, %s.", |
| outEvents[i].getKeyCode(), outEvents[i].getMetaState(), |
| outEvents[i].getAction() == AKEY_EVENT_ACTION_DOWN ? "down" : "up"); |
| } |
| #endif |
| return true; |
| } |
| |
| bool KeyCharacterMap::getKey(int32_t keyCode, const Key** outKey) const { |
| ssize_t index = mKeys.indexOfKey(keyCode); |
| if (index >= 0) { |
| *outKey = mKeys.valueAt(index); |
| return true; |
| } |
| return false; |
| } |
| |
| bool KeyCharacterMap::getKeyBehavior(int32_t keyCode, int32_t metaState, |
| const Key** outKey, const Behavior** outBehavior) const { |
| const Key* key; |
| if (getKey(keyCode, &key)) { |
| const Behavior* behavior = key->firstBehavior; |
| while (behavior) { |
| if ((behavior->metaState & metaState) == behavior->metaState) { |
| *outKey = key; |
| *outBehavior = behavior; |
| return true; |
| } |
| behavior = behavior->next; |
| } |
| } |
| return false; |
| } |
| |
| bool KeyCharacterMap::findKey(char16_t ch, int32_t* outKeyCode, int32_t* outMetaState) const { |
| if (!ch) { |
| return false; |
| } |
| |
| for (size_t i = 0; i < mKeys.size(); i++) { |
| const Key* key = mKeys.valueAt(i); |
| |
| // Try to find the most general behavior that maps to this character. |
| // For example, the base key behavior will usually be last in the list. |
| const Behavior* found = NULL; |
| for (const Behavior* behavior = key->firstBehavior; behavior; behavior = behavior->next) { |
| if (behavior->character == ch) { |
| found = behavior; |
| } |
| } |
| if (found) { |
| *outKeyCode = mKeys.keyAt(i); |
| *outMetaState = found->metaState; |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| void KeyCharacterMap::addKey(Vector<KeyEvent>& outEvents, |
| int32_t deviceId, int32_t keyCode, int32_t metaState, bool down, nsecs_t time) { |
| outEvents.push(); |
| KeyEvent& event = outEvents.editTop(); |
| event.initialize(deviceId, AINPUT_SOURCE_KEYBOARD, |
| down ? AKEY_EVENT_ACTION_DOWN : AKEY_EVENT_ACTION_UP, |
| 0, keyCode, 0, metaState, 0, time, time); |
| } |
| |
| void KeyCharacterMap::addMetaKeys(Vector<KeyEvent>& outEvents, |
| int32_t deviceId, int32_t metaState, bool down, nsecs_t time, |
| int32_t* currentMetaState) { |
| // Add and remove meta keys symmetrically. |
| if (down) { |
| addLockedMetaKey(outEvents, deviceId, metaState, time, |
| AKEYCODE_CAPS_LOCK, AMETA_CAPS_LOCK_ON, currentMetaState); |
| addLockedMetaKey(outEvents, deviceId, metaState, time, |
| AKEYCODE_NUM_LOCK, AMETA_NUM_LOCK_ON, currentMetaState); |
| addLockedMetaKey(outEvents, deviceId, metaState, time, |
| AKEYCODE_SCROLL_LOCK, AMETA_SCROLL_LOCK_ON, currentMetaState); |
| |
| addDoubleEphemeralMetaKey(outEvents, deviceId, metaState, true, time, |
| AKEYCODE_SHIFT_LEFT, AMETA_SHIFT_LEFT_ON, |
| AKEYCODE_SHIFT_RIGHT, AMETA_SHIFT_RIGHT_ON, |
| AMETA_SHIFT_ON, currentMetaState); |
| addDoubleEphemeralMetaKey(outEvents, deviceId, metaState, true, time, |
| AKEYCODE_ALT_LEFT, AMETA_ALT_LEFT_ON, |
| AKEYCODE_ALT_RIGHT, AMETA_ALT_RIGHT_ON, |
| AMETA_ALT_ON, currentMetaState); |
| addDoubleEphemeralMetaKey(outEvents, deviceId, metaState, true, time, |
| AKEYCODE_CTRL_LEFT, AMETA_CTRL_LEFT_ON, |
| AKEYCODE_CTRL_RIGHT, AMETA_CTRL_RIGHT_ON, |
| AMETA_CTRL_ON, currentMetaState); |
| addDoubleEphemeralMetaKey(outEvents, deviceId, metaState, true, time, |
| AKEYCODE_META_LEFT, AMETA_META_LEFT_ON, |
| AKEYCODE_META_RIGHT, AMETA_META_RIGHT_ON, |
| AMETA_META_ON, currentMetaState); |
| |
| addSingleEphemeralMetaKey(outEvents, deviceId, metaState, true, time, |
| AKEYCODE_SYM, AMETA_SYM_ON, currentMetaState); |
| addSingleEphemeralMetaKey(outEvents, deviceId, metaState, true, time, |
| AKEYCODE_FUNCTION, AMETA_FUNCTION_ON, currentMetaState); |
| } else { |
| addSingleEphemeralMetaKey(outEvents, deviceId, metaState, false, time, |
| AKEYCODE_FUNCTION, AMETA_FUNCTION_ON, currentMetaState); |
| addSingleEphemeralMetaKey(outEvents, deviceId, metaState, false, time, |
| AKEYCODE_SYM, AMETA_SYM_ON, currentMetaState); |
| |
| addDoubleEphemeralMetaKey(outEvents, deviceId, metaState, false, time, |
| AKEYCODE_META_LEFT, AMETA_META_LEFT_ON, |
| AKEYCODE_META_RIGHT, AMETA_META_RIGHT_ON, |
| AMETA_META_ON, currentMetaState); |
| addDoubleEphemeralMetaKey(outEvents, deviceId, metaState, false, time, |
| AKEYCODE_CTRL_LEFT, AMETA_CTRL_LEFT_ON, |
| AKEYCODE_CTRL_RIGHT, AMETA_CTRL_RIGHT_ON, |
| AMETA_CTRL_ON, currentMetaState); |
| addDoubleEphemeralMetaKey(outEvents, deviceId, metaState, false, time, |
| AKEYCODE_ALT_LEFT, AMETA_ALT_LEFT_ON, |
| AKEYCODE_ALT_RIGHT, AMETA_ALT_RIGHT_ON, |
| AMETA_ALT_ON, currentMetaState); |
| addDoubleEphemeralMetaKey(outEvents, deviceId, metaState, false, time, |
| AKEYCODE_SHIFT_LEFT, AMETA_SHIFT_LEFT_ON, |
| AKEYCODE_SHIFT_RIGHT, AMETA_SHIFT_RIGHT_ON, |
| AMETA_SHIFT_ON, currentMetaState); |
| |
| addLockedMetaKey(outEvents, deviceId, metaState, time, |
| AKEYCODE_SCROLL_LOCK, AMETA_SCROLL_LOCK_ON, currentMetaState); |
| addLockedMetaKey(outEvents, deviceId, metaState, time, |
| AKEYCODE_NUM_LOCK, AMETA_NUM_LOCK_ON, currentMetaState); |
| addLockedMetaKey(outEvents, deviceId, metaState, time, |
| AKEYCODE_CAPS_LOCK, AMETA_CAPS_LOCK_ON, currentMetaState); |
| } |
| } |
| |
| bool KeyCharacterMap::addSingleEphemeralMetaKey(Vector<KeyEvent>& outEvents, |
| int32_t deviceId, int32_t metaState, bool down, nsecs_t time, |
| int32_t keyCode, int32_t keyMetaState, |
| int32_t* currentMetaState) { |
| if ((metaState & keyMetaState) == keyMetaState) { |
| *currentMetaState = updateMetaState(keyCode, down, *currentMetaState); |
| addKey(outEvents, deviceId, keyCode, *currentMetaState, down, time); |
| return true; |
| } |
| return false; |
| } |
| |
| void KeyCharacterMap::addDoubleEphemeralMetaKey(Vector<KeyEvent>& outEvents, |
| int32_t deviceId, int32_t metaState, bool down, nsecs_t time, |
| int32_t leftKeyCode, int32_t leftKeyMetaState, |
| int32_t rightKeyCode, int32_t rightKeyMetaState, |
| int32_t eitherKeyMetaState, |
| int32_t* currentMetaState) { |
| bool specific = false; |
| specific |= addSingleEphemeralMetaKey(outEvents, deviceId, metaState, down, time, |
| leftKeyCode, leftKeyMetaState, currentMetaState); |
| specific |= addSingleEphemeralMetaKey(outEvents, deviceId, metaState, down, time, |
| rightKeyCode, rightKeyMetaState, currentMetaState); |
| |
| if (!specific) { |
| addSingleEphemeralMetaKey(outEvents, deviceId, metaState, down, time, |
| leftKeyCode, eitherKeyMetaState, currentMetaState); |
| } |
| } |
| |
| void KeyCharacterMap::addLockedMetaKey(Vector<KeyEvent>& outEvents, |
| int32_t deviceId, int32_t metaState, nsecs_t time, |
| int32_t keyCode, int32_t keyMetaState, |
| int32_t* currentMetaState) { |
| if ((metaState & keyMetaState) == keyMetaState) { |
| *currentMetaState = updateMetaState(keyCode, true, *currentMetaState); |
| addKey(outEvents, deviceId, keyCode, *currentMetaState, true, time); |
| *currentMetaState = updateMetaState(keyCode, false, *currentMetaState); |
| addKey(outEvents, deviceId, keyCode, *currentMetaState, false, time); |
| } |
| } |
| |
| |
| // --- KeyCharacterMap::Key --- |
| |
| KeyCharacterMap::Key::Key() : |
| label(0), number(0), firstBehavior(NULL) { |
| } |
| |
| KeyCharacterMap::Key::~Key() { |
| Behavior* behavior = firstBehavior; |
| while (behavior) { |
| Behavior* next = behavior->next; |
| delete behavior; |
| behavior = next; |
| } |
| } |
| |
| |
| // --- KeyCharacterMap::Behavior --- |
| |
| KeyCharacterMap::Behavior::Behavior() : |
| next(NULL), metaState(0), character(0), fallbackKeyCode(0) { |
| } |
| |
| |
| // --- KeyCharacterMap::Parser --- |
| |
| KeyCharacterMap::Parser::Parser(KeyCharacterMap* map, Tokenizer* tokenizer) : |
| mMap(map), mTokenizer(tokenizer), mState(STATE_TOP) { |
| } |
| |
| KeyCharacterMap::Parser::~Parser() { |
| } |
| |
| status_t KeyCharacterMap::Parser::parse() { |
| while (!mTokenizer->isEof()) { |
| #if DEBUG_PARSER |
| ALOGD("Parsing %s: '%s'.", mTokenizer->getLocation().string(), |
| mTokenizer->peekRemainderOfLine().string()); |
| #endif |
| |
| mTokenizer->skipDelimiters(WHITESPACE); |
| |
| if (!mTokenizer->isEol() && mTokenizer->peekChar() != '#') { |
| switch (mState) { |
| case STATE_TOP: { |
| String8 keywordToken = mTokenizer->nextToken(WHITESPACE); |
| if (keywordToken == "type") { |
| mTokenizer->skipDelimiters(WHITESPACE); |
| status_t status = parseType(); |
| if (status) return status; |
| } else if (keywordToken == "key") { |
| mTokenizer->skipDelimiters(WHITESPACE); |
| status_t status = parseKey(); |
| if (status) return status; |
| } else { |
| ALOGE("%s: Expected keyword, got '%s'.", mTokenizer->getLocation().string(), |
| keywordToken.string()); |
| return BAD_VALUE; |
| } |
| break; |
| } |
| |
| case STATE_KEY: { |
| status_t status = parseKeyProperty(); |
| if (status) return status; |
| break; |
| } |
| } |
| |
| mTokenizer->skipDelimiters(WHITESPACE); |
| if (!mTokenizer->isEol()) { |
| ALOGE("%s: Expected end of line, got '%s'.", |
| mTokenizer->getLocation().string(), |
| mTokenizer->peekRemainderOfLine().string()); |
| return BAD_VALUE; |
| } |
| } |
| |
| mTokenizer->nextLine(); |
| } |
| |
| if (mState != STATE_TOP) { |
| ALOGE("%s: Unterminated key description at end of file.", |
| mTokenizer->getLocation().string()); |
| return BAD_VALUE; |
| } |
| |
| if (mMap->mType == KEYBOARD_TYPE_UNKNOWN) { |
| ALOGE("%s: Missing required keyboard 'type' declaration.", |
| mTokenizer->getLocation().string()); |
| return BAD_VALUE; |
| } |
| |
| return NO_ERROR; |
| } |
| |
| status_t KeyCharacterMap::Parser::parseType() { |
| if (mMap->mType != KEYBOARD_TYPE_UNKNOWN) { |
| ALOGE("%s: Duplicate keyboard 'type' declaration.", |
| mTokenizer->getLocation().string()); |
| return BAD_VALUE; |
| } |
| |
| KeyboardType type; |
| String8 typeToken = mTokenizer->nextToken(WHITESPACE); |
| if (typeToken == "NUMERIC") { |
| type = KEYBOARD_TYPE_NUMERIC; |
| } else if (typeToken == "PREDICTIVE") { |
| type = KEYBOARD_TYPE_PREDICTIVE; |
| } else if (typeToken == "ALPHA") { |
| type = KEYBOARD_TYPE_ALPHA; |
| } else if (typeToken == "FULL") { |
| type = KEYBOARD_TYPE_FULL; |
| } else if (typeToken == "SPECIAL_FUNCTION") { |
| type = KEYBOARD_TYPE_SPECIAL_FUNCTION; |
| } else { |
| ALOGE("%s: Expected keyboard type label, got '%s'.", mTokenizer->getLocation().string(), |
| typeToken.string()); |
| return BAD_VALUE; |
| } |
| |
| #if DEBUG_PARSER |
| ALOGD("Parsed type: type=%d.", type); |
| #endif |
| mMap->mType = type; |
| return NO_ERROR; |
| } |
| |
| status_t KeyCharacterMap::Parser::parseKey() { |
| String8 keyCodeToken = mTokenizer->nextToken(WHITESPACE); |
| int32_t keyCode = getKeyCodeByLabel(keyCodeToken.string()); |
| if (!keyCode) { |
| ALOGE("%s: Expected key code label, got '%s'.", mTokenizer->getLocation().string(), |
| keyCodeToken.string()); |
| return BAD_VALUE; |
| } |
| if (mMap->mKeys.indexOfKey(keyCode) >= 0) { |
| ALOGE("%s: Duplicate entry for key code '%s'.", mTokenizer->getLocation().string(), |
| keyCodeToken.string()); |
| return BAD_VALUE; |
| } |
| |
| mTokenizer->skipDelimiters(WHITESPACE); |
| String8 openBraceToken = mTokenizer->nextToken(WHITESPACE); |
| if (openBraceToken != "{") { |
| ALOGE("%s: Expected '{' after key code label, got '%s'.", |
| mTokenizer->getLocation().string(), openBraceToken.string()); |
| return BAD_VALUE; |
| } |
| |
| #if DEBUG_PARSER |
| ALOGD("Parsed beginning of key: keyCode=%d.", keyCode); |
| #endif |
| mKeyCode = keyCode; |
| mMap->mKeys.add(keyCode, new Key()); |
| mState = STATE_KEY; |
| return NO_ERROR; |
| } |
| |
| status_t KeyCharacterMap::Parser::parseKeyProperty() { |
| String8 token = mTokenizer->nextToken(WHITESPACE_OR_PROPERTY_DELIMITER); |
| if (token == "}") { |
| mState = STATE_TOP; |
| return NO_ERROR; |
| } |
| |
| Vector<Property> properties; |
| |
| // Parse all comma-delimited property names up to the first colon. |
| for (;;) { |
| if (token == "label") { |
| properties.add(Property(PROPERTY_LABEL)); |
| } else if (token == "number") { |
| properties.add(Property(PROPERTY_NUMBER)); |
| } else { |
| int32_t metaState; |
| status_t status = parseModifier(token, &metaState); |
| if (status) { |
| ALOGE("%s: Expected a property name or modifier, got '%s'.", |
| mTokenizer->getLocation().string(), token.string()); |
| return status; |
| } |
| properties.add(Property(PROPERTY_META, metaState)); |
| } |
| |
| mTokenizer->skipDelimiters(WHITESPACE); |
| if (!mTokenizer->isEol()) { |
| char ch = mTokenizer->nextChar(); |
| if (ch == ':') { |
| break; |
| } else if (ch == ',') { |
| mTokenizer->skipDelimiters(WHITESPACE); |
| token = mTokenizer->nextToken(WHITESPACE_OR_PROPERTY_DELIMITER); |
| continue; |
| } |
| } |
| |
| ALOGE("%s: Expected ',' or ':' after property name.", |
| mTokenizer->getLocation().string()); |
| return BAD_VALUE; |
| } |
| |
| // Parse behavior after the colon. |
| mTokenizer->skipDelimiters(WHITESPACE); |
| |
| Behavior behavior; |
| bool haveCharacter = false; |
| bool haveFallback = false; |
| |
| do { |
| char ch = mTokenizer->peekChar(); |
| if (ch == '\'') { |
| char16_t character; |
| status_t status = parseCharacterLiteral(&character); |
| if (status || !character) { |
| ALOGE("%s: Invalid character literal for key.", |
| mTokenizer->getLocation().string()); |
| return BAD_VALUE; |
| } |
| if (haveCharacter) { |
| ALOGE("%s: Cannot combine multiple character literals or 'none'.", |
| mTokenizer->getLocation().string()); |
| return BAD_VALUE; |
| } |
| behavior.character = character; |
| haveCharacter = true; |
| } else { |
| token = mTokenizer->nextToken(WHITESPACE); |
| if (token == "none") { |
| if (haveCharacter) { |
| ALOGE("%s: Cannot combine multiple character literals or 'none'.", |
| mTokenizer->getLocation().string()); |
| return BAD_VALUE; |
| } |
| haveCharacter = true; |
| } else if (token == "fallback") { |
| mTokenizer->skipDelimiters(WHITESPACE); |
| token = mTokenizer->nextToken(WHITESPACE); |
| int32_t keyCode = getKeyCodeByLabel(token.string()); |
| if (!keyCode) { |
| ALOGE("%s: Invalid key code label for fallback behavior, got '%s'.", |
| mTokenizer->getLocation().string(), |
| token.string()); |
| return BAD_VALUE; |
| } |
| if (haveFallback) { |
| ALOGE("%s: Cannot combine multiple fallback key codes.", |
| mTokenizer->getLocation().string()); |
| return BAD_VALUE; |
| } |
| behavior.fallbackKeyCode = keyCode; |
| haveFallback = true; |
| } else { |
| ALOGE("%s: Expected a key behavior after ':'.", |
| mTokenizer->getLocation().string()); |
| return BAD_VALUE; |
| } |
| } |
| |
| mTokenizer->skipDelimiters(WHITESPACE); |
| } while (!mTokenizer->isEol()); |
| |
| // Add the behavior. |
| Key* key = mMap->mKeys.valueFor(mKeyCode); |
| for (size_t i = 0; i < properties.size(); i++) { |
| const Property& property = properties.itemAt(i); |
| switch (property.property) { |
| case PROPERTY_LABEL: |
| if (key->label) { |
| ALOGE("%s: Duplicate label for key.", |
| mTokenizer->getLocation().string()); |
| return BAD_VALUE; |
| } |
| key->label = behavior.character; |
| #if DEBUG_PARSER |
| ALOGD("Parsed key label: keyCode=%d, label=%d.", mKeyCode, key->label); |
| #endif |
| break; |
| case PROPERTY_NUMBER: |
| if (key->number) { |
| ALOGE("%s: Duplicate number for key.", |
| mTokenizer->getLocation().string()); |
| return BAD_VALUE; |
| } |
| key->number = behavior.character; |
| #if DEBUG_PARSER |
| ALOGD("Parsed key number: keyCode=%d, number=%d.", mKeyCode, key->number); |
| #endif |
| break; |
| case PROPERTY_META: { |
| for (Behavior* b = key->firstBehavior; b; b = b->next) { |
| if (b->metaState == property.metaState) { |
| ALOGE("%s: Duplicate key behavior for modifier.", |
| mTokenizer->getLocation().string()); |
| return BAD_VALUE; |
| } |
| } |
| Behavior* newBehavior = new Behavior(behavior); |
| newBehavior->metaState = property.metaState; |
| newBehavior->next = key->firstBehavior; |
| key->firstBehavior = newBehavior; |
| #if DEBUG_PARSER |
| ALOGD("Parsed key meta: keyCode=%d, meta=0x%x, char=%d, fallback=%d.", mKeyCode, |
| newBehavior->metaState, newBehavior->character, newBehavior->fallbackKeyCode); |
| #endif |
| break; |
| } |
| } |
| } |
| return NO_ERROR; |
| } |
| |
| status_t KeyCharacterMap::Parser::parseModifier(const String8& token, int32_t* outMetaState) { |
| if (token == "base") { |
| *outMetaState = 0; |
| return NO_ERROR; |
| } |
| |
| int32_t combinedMeta = 0; |
| |
| const char* str = token.string(); |
| const char* start = str; |
| for (const char* cur = str; ; cur++) { |
| char ch = *cur; |
| if (ch == '+' || ch == '\0') { |
| size_t len = cur - start; |
| int32_t metaState = 0; |
| for (size_t i = 0; i < sizeof(modifiers) / sizeof(Modifier); i++) { |
| if (strlen(modifiers[i].label) == len |
| && strncmp(modifiers[i].label, start, len) == 0) { |
| metaState = modifiers[i].metaState; |
| break; |
| } |
| } |
| if (!metaState) { |
| return BAD_VALUE; |
| } |
| if (combinedMeta & metaState) { |
| ALOGE("%s: Duplicate modifier combination '%s'.", |
| mTokenizer->getLocation().string(), token.string()); |
| return BAD_VALUE; |
| } |
| |
| combinedMeta |= metaState; |
| start = cur + 1; |
| |
| if (ch == '\0') { |
| break; |
| } |
| } |
| } |
| *outMetaState = combinedMeta; |
| return NO_ERROR; |
| } |
| |
| status_t KeyCharacterMap::Parser::parseCharacterLiteral(char16_t* outCharacter) { |
| char ch = mTokenizer->nextChar(); |
| if (ch != '\'') { |
| goto Error; |
| } |
| |
| ch = mTokenizer->nextChar(); |
| if (ch == '\\') { |
| // Escape sequence. |
| ch = mTokenizer->nextChar(); |
| if (ch == 'n') { |
| *outCharacter = '\n'; |
| } else if (ch == 't') { |
| *outCharacter = '\t'; |
| } else if (ch == '\\') { |
| *outCharacter = '\\'; |
| } else if (ch == '\'') { |
| *outCharacter = '\''; |
| } else if (ch == '"') { |
| *outCharacter = '"'; |
| } else if (ch == 'u') { |
| *outCharacter = 0; |
| for (int i = 0; i < 4; i++) { |
| ch = mTokenizer->nextChar(); |
| int digit; |
| if (ch >= '0' && ch <= '9') { |
| digit = ch - '0'; |
| } else if (ch >= 'A' && ch <= 'F') { |
| digit = ch - 'A' + 10; |
| } else if (ch >= 'a' && ch <= 'f') { |
| digit = ch - 'a' + 10; |
| } else { |
| goto Error; |
| } |
| *outCharacter = (*outCharacter << 4) | digit; |
| } |
| } else { |
| goto Error; |
| } |
| } else if (ch >= 32 && ch <= 126 && ch != '\'') { |
| // ASCII literal character. |
| *outCharacter = ch; |
| } else { |
| goto Error; |
| } |
| |
| ch = mTokenizer->nextChar(); |
| if (ch != '\'') { |
| goto Error; |
| } |
| |
| // Ensure that we consumed the entire token. |
| if (mTokenizer->nextToken(WHITESPACE).isEmpty()) { |
| return NO_ERROR; |
| } |
| |
| Error: |
| ALOGE("%s: Malformed character literal.", mTokenizer->getLocation().string()); |
| return BAD_VALUE; |
| } |
| |
| } // namespace android |