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Diffstat (limited to 'libs/androidfw/KeyCharacterMap.cpp')
| -rw-r--r-- | libs/androidfw/KeyCharacterMap.cpp | 838 |
1 files changed, 838 insertions, 0 deletions
diff --git a/libs/androidfw/KeyCharacterMap.cpp b/libs/androidfw/KeyCharacterMap.cpp new file mode 100644 index 0000000..6984084 --- /dev/null +++ b/libs/androidfw/KeyCharacterMap.cpp @@ -0,0 +1,838 @@ +/* + * 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 |