| /* |
| * 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> |
| |
| #ifdef __linux__ |
| #include <binder/Parcel.h> |
| #endif |
| #include <android/keycodes.h> |
| #include <attestation/HmacKeyManager.h> |
| #include <input/InputEventLabels.h> |
| #include <input/KeyCharacterMap.h> |
| #include <input/Keyboard.h> |
| |
| #include <gui/constants.h> |
| #include <utils/Errors.h> |
| #include <utils/Log.h> |
| #include <utils/Timers.h> |
| #include <utils/Tokenizer.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(const std::string& filename) : mLoadFileName(filename) {} |
| |
| base::Result<std::shared_ptr<KeyCharacterMap>> KeyCharacterMap::load(const std::string& filename, |
| Format format) { |
| Tokenizer* tokenizer; |
| status_t status = Tokenizer::open(String8(filename.c_str()), &tokenizer); |
| if (status) { |
| return Errorf("Error {} opening key character map file {}.", status, filename.c_str()); |
| } |
| std::shared_ptr<KeyCharacterMap> map = |
| std::shared_ptr<KeyCharacterMap>(new KeyCharacterMap(filename)); |
| if (!map.get()) { |
| ALOGE("Error allocating key character map."); |
| return Errorf("Error allocating key character map."); |
| } |
| std::unique_ptr<Tokenizer> t(tokenizer); |
| status = map->load(t.get(), format); |
| if (status == OK) { |
| return map; |
| } |
| return Errorf("Load KeyCharacterMap failed {}.", status); |
| } |
| |
| base::Result<std::shared_ptr<KeyCharacterMap>> KeyCharacterMap::loadContents( |
| const std::string& filename, const char* contents, Format format) { |
| Tokenizer* tokenizer; |
| status_t status = Tokenizer::fromContents(String8(filename.c_str()), contents, &tokenizer); |
| if (status) { |
| ALOGE("Error %d opening key character map.", status); |
| return Errorf("Error {} opening key character map.", status); |
| } |
| std::shared_ptr<KeyCharacterMap> map = |
| std::shared_ptr<KeyCharacterMap>(new KeyCharacterMap(filename)); |
| if (!map.get()) { |
| ALOGE("Error allocating key character map."); |
| return Errorf("Error allocating key character map."); |
| } |
| std::unique_ptr<Tokenizer> t(tokenizer); |
| status = map->load(t.get(), format); |
| if (status == OK) { |
| return map; |
| } |
| return Errorf("Load KeyCharacterMap failed {}.", status); |
| } |
| |
| status_t KeyCharacterMap::load(Tokenizer* tokenizer, Format format) { |
| status_t status = OK; |
| #if DEBUG_PARSER_PERFORMANCE |
| nsecs_t startTime = systemTime(SYSTEM_TIME_MONOTONIC); |
| #endif |
| Parser parser(this, tokenizer, format); |
| 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().c_str(), tokenizer->getLineNumber(), elapsedTime / 1000000.0); |
| #endif |
| if (status != OK) { |
| ALOGE("Loading KeyCharacterMap failed with status %s", statusToString(status).c_str()); |
| } |
| return status; |
| } |
| |
| void KeyCharacterMap::clear() { |
| mKeysByScanCode.clear(); |
| mKeysByUsageCode.clear(); |
| mKeys.clear(); |
| mLayoutOverlayApplied = false; |
| mType = KeyboardType::UNKNOWN; |
| } |
| |
| status_t KeyCharacterMap::reloadBaseFromFile() { |
| clear(); |
| Tokenizer* tokenizer; |
| status_t status = Tokenizer::open(String8(mLoadFileName.c_str()), &tokenizer); |
| if (status) { |
| ALOGE("Error %s opening key character map file %s.", statusToString(status).c_str(), |
| mLoadFileName.c_str()); |
| return status; |
| } |
| std::unique_ptr<Tokenizer> t(tokenizer); |
| return load(t.get(), KeyCharacterMap::Format::BASE); |
| } |
| |
| void KeyCharacterMap::combine(const KeyCharacterMap& overlay) { |
| if (mLayoutOverlayApplied) { |
| reloadBaseFromFile(); |
| } |
| for (const auto& [keyCode, key] : overlay.mKeys) { |
| mKeys.insert_or_assign(keyCode, key); |
| } |
| |
| for (const auto& [fromScanCode, toAndroidKeyCode] : overlay.mKeysByScanCode) { |
| mKeysByScanCode.insert_or_assign(fromScanCode, toAndroidKeyCode); |
| } |
| |
| for (const auto& [fromHidUsageCode, toAndroidKeyCode] : overlay.mKeysByUsageCode) { |
| mKeysByUsageCode.insert_or_assign(fromHidUsageCode, toAndroidKeyCode); |
| } |
| mLayoutOverlayApplied = true; |
| } |
| |
| void KeyCharacterMap::clearLayoutOverlay() { |
| if (mLayoutOverlayApplied) { |
| reloadBaseFromFile(); |
| mLayoutOverlayApplied = false; |
| } |
| } |
| |
| KeyCharacterMap::KeyboardType KeyCharacterMap::getKeyboardType() const { |
| return mType; |
| } |
| |
| const std::string KeyCharacterMap::getLoadFileName() const { |
| return mLoadFileName; |
| } |
| |
| char16_t KeyCharacterMap::getDisplayLabel(int32_t keyCode) const { |
| char16_t result = 0; |
| const Key* key = getKey(keyCode); |
| if (key != nullptr) { |
| 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 = getKey(keyCode); |
| if (key != nullptr) { |
| 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 Behavior* behavior = getKeyBehavior(keyCode, metaState); |
| if (behavior != nullptr) { |
| 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 Behavior* behavior = getKeyBehavior(keyCode, metaState); |
| if (behavior != nullptr) { |
| 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 = getKey(keyCode); |
| if (key != nullptr) { |
| // 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->behaviors) { |
| 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) { |
| // Found exact match! |
| return result; |
| } |
| break; |
| } |
| } |
| } |
| } |
| } |
| 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).c_str(), 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).c_str(), 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; |
| } |
| |
| void KeyCharacterMap::addKeyRemapping(int32_t fromKeyCode, int32_t toKeyCode) { |
| if (fromKeyCode == toKeyCode) { |
| mKeyRemapping.erase(fromKeyCode); |
| #if DEBUG_MAPPING |
| ALOGD("addKeyRemapping: Cleared remapping forKeyCode=%d ~ Result Successful.", fromKeyCode); |
| #endif |
| return; |
| } |
| mKeyRemapping.insert_or_assign(fromKeyCode, toKeyCode); |
| #if DEBUG_MAPPING |
| ALOGD("addKeyRemapping: fromKeyCode=%d, toKeyCode=%d ~ Result Successful.", fromKeyCode, |
| toKeyCode); |
| #endif |
| } |
| |
| status_t KeyCharacterMap::mapKey(int32_t scanCode, int32_t usageCode, int32_t* outKeyCode) const { |
| if (usageCode) { |
| const auto it = mKeysByUsageCode.find(usageCode); |
| if (it != mKeysByUsageCode.end()) { |
| *outKeyCode = it->second; |
| #if DEBUG_MAPPING |
| ALOGD("mapKey: scanCode=%d, usageCode=0x%08x ~ Result keyCode=%d.", |
| scanCode, usageCode, *outKeyCode); |
| #endif |
| return OK; |
| } |
| } |
| if (scanCode) { |
| const auto it = mKeysByScanCode.find(scanCode); |
| if (it != mKeysByScanCode.end()) { |
| *outKeyCode = it->second; |
| #if DEBUG_MAPPING |
| ALOGD("mapKey: scanCode=%d, usageCode=0x%08x ~ Result keyCode=%d.", |
| scanCode, usageCode, *outKeyCode); |
| #endif |
| return OK; |
| } |
| } |
| |
| #if DEBUG_MAPPING |
| ALOGD("mapKey: scanCode=%d, usageCode=0x%08x ~ Failed.", scanCode, usageCode); |
| #endif |
| *outKeyCode = AKEYCODE_UNKNOWN; |
| return NAME_NOT_FOUND; |
| } |
| |
| int32_t KeyCharacterMap::applyKeyRemapping(int32_t fromKeyCode) const { |
| int32_t toKeyCode = fromKeyCode; |
| |
| const auto it = mKeyRemapping.find(fromKeyCode); |
| if (it != mKeyRemapping.end()) { |
| toKeyCode = it->second; |
| } |
| #if DEBUG_MAPPING |
| ALOGD("applyKeyRemapping: keyCode=%d ~ replacement keyCode=%d.", fromKeyCode, toKeyCode); |
| #endif |
| return toKeyCode; |
| } |
| |
| std::pair<int32_t, int32_t> KeyCharacterMap::applyKeyBehavior(int32_t fromKeyCode, |
| int32_t fromMetaState) const { |
| int32_t toKeyCode = fromKeyCode; |
| int32_t toMetaState = fromMetaState; |
| |
| const Behavior* behavior = getKeyBehavior(fromKeyCode, fromMetaState); |
| if (behavior != nullptr) { |
| if (behavior->replacementKeyCode) { |
| toKeyCode = behavior->replacementKeyCode; |
| toMetaState = fromMetaState & ~behavior->metaState; |
| // Reset dependent meta states. |
| if (behavior->metaState & AMETA_ALT_ON) { |
| toMetaState &= ~(AMETA_ALT_LEFT_ON | AMETA_ALT_RIGHT_ON); |
| } |
| if (behavior->metaState & (AMETA_ALT_LEFT_ON | AMETA_ALT_RIGHT_ON)) { |
| toMetaState &= ~AMETA_ALT_ON; |
| } |
| if (behavior->metaState & AMETA_CTRL_ON) { |
| toMetaState &= ~(AMETA_CTRL_LEFT_ON | AMETA_CTRL_RIGHT_ON); |
| } |
| if (behavior->metaState & (AMETA_CTRL_LEFT_ON | AMETA_CTRL_RIGHT_ON)) { |
| toMetaState &= ~AMETA_CTRL_ON; |
| } |
| if (behavior->metaState & AMETA_SHIFT_ON) { |
| toMetaState &= ~(AMETA_SHIFT_LEFT_ON | AMETA_SHIFT_RIGHT_ON); |
| } |
| if (behavior->metaState & (AMETA_SHIFT_LEFT_ON | AMETA_SHIFT_RIGHT_ON)) { |
| toMetaState &= ~AMETA_SHIFT_ON; |
| } |
| // ... and put universal bits back if needed |
| toMetaState = normalizeMetaState(toMetaState); |
| } |
| } |
| |
| #if DEBUG_MAPPING |
| ALOGD("applyKeyBehavior: keyCode=%d, metaState=0x%08x ~ " |
| "replacement keyCode=%d, replacement metaState=0x%08x.", |
| fromKeyCode, fromMetaState, toKeyCode, toMetaState); |
| #endif |
| return std::make_pair(toKeyCode, toMetaState); |
| } |
| |
| const KeyCharacterMap::Key* KeyCharacterMap::getKey(int32_t keyCode) const { |
| auto it = mKeys.find(keyCode); |
| if (it != mKeys.end()) { |
| return &it->second; |
| } |
| return nullptr; |
| } |
| |
| const KeyCharacterMap::Behavior* KeyCharacterMap::getKeyBehavior(int32_t keyCode, |
| int32_t metaState) const { |
| const Key* key = getKey(keyCode); |
| if (key != nullptr) { |
| for (const Behavior& behavior : key->behaviors) { |
| if (matchesMetaState(metaState, behavior.metaState)) { |
| return &behavior; |
| } |
| } |
| } |
| return nullptr; |
| } |
| |
| bool KeyCharacterMap::matchesMetaState(int32_t eventMetaState, int32_t behaviorMetaState) { |
| // Behavior must have at least the set of meta states specified. |
| // And if the key event has CTRL, ALT or META then the behavior must exactly |
| // match those, taking into account that a behavior can specify that it handles |
| // one, both or either of a left/right modifier pair. |
| if ((eventMetaState & behaviorMetaState) == behaviorMetaState) { |
| const int32_t EXACT_META_STATES = |
| AMETA_CTRL_ON | AMETA_CTRL_LEFT_ON | AMETA_CTRL_RIGHT_ON |
| | AMETA_ALT_ON | AMETA_ALT_LEFT_ON | AMETA_ALT_RIGHT_ON |
| | AMETA_META_ON | AMETA_META_LEFT_ON | AMETA_META_RIGHT_ON; |
| int32_t unmatchedMetaState = eventMetaState & ~behaviorMetaState & EXACT_META_STATES; |
| if (behaviorMetaState & AMETA_CTRL_ON) { |
| unmatchedMetaState &= ~(AMETA_CTRL_LEFT_ON | AMETA_CTRL_RIGHT_ON); |
| } else if (behaviorMetaState & (AMETA_CTRL_LEFT_ON | AMETA_CTRL_RIGHT_ON)) { |
| unmatchedMetaState &= ~AMETA_CTRL_ON; |
| } |
| if (behaviorMetaState & AMETA_ALT_ON) { |
| unmatchedMetaState &= ~(AMETA_ALT_LEFT_ON | AMETA_ALT_RIGHT_ON); |
| } else if (behaviorMetaState & (AMETA_ALT_LEFT_ON | AMETA_ALT_RIGHT_ON)) { |
| unmatchedMetaState &= ~AMETA_ALT_ON; |
| } |
| if (behaviorMetaState & AMETA_META_ON) { |
| unmatchedMetaState &= ~(AMETA_META_LEFT_ON | AMETA_META_RIGHT_ON); |
| } else if (behaviorMetaState & (AMETA_META_LEFT_ON | AMETA_META_RIGHT_ON)) { |
| unmatchedMetaState &= ~AMETA_META_ON; |
| } |
| return !unmatchedMetaState; |
| } |
| return false; |
| } |
| |
| bool KeyCharacterMap::findKey(char16_t ch, int32_t* outKeyCode, int32_t* outMetaState) const { |
| if (!ch) { |
| return false; |
| } |
| |
| for (const auto& [keyCode, key] : mKeys) { |
| // 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 = nullptr; |
| for (const Behavior& behavior : key.behaviors) { |
| if (behavior.character == ch) { |
| found = &behavior; |
| } |
| } |
| if (found != nullptr) { |
| *outKeyCode = keyCode; |
| *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(InputEvent::nextId(), deviceId, AINPUT_SOURCE_KEYBOARD, ADISPLAY_ID_NONE, |
| INVALID_HMAC, 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); |
| } |
| } |
| |
| #ifdef __linux__ |
| std::unique_ptr<KeyCharacterMap> KeyCharacterMap::readFromParcel(Parcel* parcel) { |
| if (parcel == nullptr) { |
| ALOGE("%s: Null parcel", __func__); |
| return nullptr; |
| } |
| std::string loadFileName = parcel->readCString(); |
| std::unique_ptr<KeyCharacterMap> map = |
| std::make_unique<KeyCharacterMap>(KeyCharacterMap(loadFileName)); |
| map->mType = static_cast<KeyCharacterMap::KeyboardType>(parcel->readInt32()); |
| map->mLayoutOverlayApplied = parcel->readBool(); |
| size_t numKeys = parcel->readInt32(); |
| if (parcel->errorCheck()) { |
| return nullptr; |
| } |
| if (numKeys > MAX_KEYS) { |
| ALOGE("Too many keys in KeyCharacterMap (%zu > %d)", numKeys, MAX_KEYS); |
| return nullptr; |
| } |
| |
| for (size_t i = 0; i < numKeys; i++) { |
| int32_t keyCode = parcel->readInt32(); |
| char16_t label = parcel->readInt32(); |
| char16_t number = parcel->readInt32(); |
| if (parcel->errorCheck()) { |
| return nullptr; |
| } |
| |
| Key key{.label = label, .number = number}; |
| while (parcel->readInt32()) { |
| int32_t metaState = parcel->readInt32(); |
| char16_t character = parcel->readInt32(); |
| int32_t fallbackKeyCode = parcel->readInt32(); |
| int32_t replacementKeyCode = parcel->readInt32(); |
| if (parcel->errorCheck()) { |
| return nullptr; |
| } |
| |
| key.behaviors.push_back({ |
| .metaState = metaState, |
| .character = character, |
| .fallbackKeyCode = fallbackKeyCode, |
| .replacementKeyCode = replacementKeyCode, |
| }); |
| } |
| map->mKeys.emplace(keyCode, std::move(key)); |
| |
| if (parcel->errorCheck()) { |
| return nullptr; |
| } |
| } |
| size_t numKeyRemapping = parcel->readInt32(); |
| if (parcel->errorCheck()) { |
| return nullptr; |
| } |
| for (size_t i = 0; i < numKeyRemapping; i++) { |
| int32_t key = parcel->readInt32(); |
| int32_t value = parcel->readInt32(); |
| map->mKeyRemapping.insert_or_assign(key, value); |
| if (parcel->errorCheck()) { |
| return nullptr; |
| } |
| } |
| size_t numKeysByScanCode = parcel->readInt32(); |
| if (parcel->errorCheck()) { |
| return nullptr; |
| } |
| for (size_t i = 0; i < numKeysByScanCode; i++) { |
| int32_t key = parcel->readInt32(); |
| int32_t value = parcel->readInt32(); |
| map->mKeysByScanCode.insert_or_assign(key, value); |
| if (parcel->errorCheck()) { |
| return nullptr; |
| } |
| } |
| size_t numKeysByUsageCode = parcel->readInt32(); |
| if (parcel->errorCheck()) { |
| return nullptr; |
| } |
| for (size_t i = 0; i < numKeysByUsageCode; i++) { |
| int32_t key = parcel->readInt32(); |
| int32_t value = parcel->readInt32(); |
| map->mKeysByUsageCode.insert_or_assign(key, value); |
| if (parcel->errorCheck()) { |
| return nullptr; |
| } |
| } |
| return map; |
| } |
| |
| void KeyCharacterMap::writeToParcel(Parcel* parcel) const { |
| if (parcel == nullptr) { |
| ALOGE("%s: Null parcel", __func__); |
| return; |
| } |
| parcel->writeCString(mLoadFileName.c_str()); |
| parcel->writeInt32(static_cast<int32_t>(mType)); |
| parcel->writeBool(mLayoutOverlayApplied); |
| |
| size_t numKeys = mKeys.size(); |
| parcel->writeInt32(numKeys); |
| for (const auto& [keyCode, key] : mKeys) { |
| parcel->writeInt32(keyCode); |
| parcel->writeInt32(key.label); |
| parcel->writeInt32(key.number); |
| for (const Behavior& behavior : key.behaviors) { |
| parcel->writeInt32(1); |
| parcel->writeInt32(behavior.metaState); |
| parcel->writeInt32(behavior.character); |
| parcel->writeInt32(behavior.fallbackKeyCode); |
| parcel->writeInt32(behavior.replacementKeyCode); |
| } |
| parcel->writeInt32(0); |
| } |
| size_t numKeyRemapping = mKeyRemapping.size(); |
| parcel->writeInt32(numKeyRemapping); |
| for (auto const& [fromAndroidKeyCode, toAndroidKeyCode] : mKeyRemapping) { |
| parcel->writeInt32(fromAndroidKeyCode); |
| parcel->writeInt32(toAndroidKeyCode); |
| } |
| size_t numKeysByScanCode = mKeysByScanCode.size(); |
| parcel->writeInt32(numKeysByScanCode); |
| for (auto const& [fromScanCode, toAndroidKeyCode] : mKeysByScanCode) { |
| parcel->writeInt32(fromScanCode); |
| parcel->writeInt32(toAndroidKeyCode); |
| } |
| size_t numKeysByUsageCode = mKeysByUsageCode.size(); |
| parcel->writeInt32(numKeysByUsageCode); |
| for (auto const& [fromUsageCode, toAndroidKeyCode] : mKeysByUsageCode) { |
| parcel->writeInt32(fromUsageCode); |
| parcel->writeInt32(toAndroidKeyCode); |
| } |
| } |
| #endif // __linux__ |
| |
| // --- KeyCharacterMap::Parser --- |
| |
| KeyCharacterMap::Parser::Parser(KeyCharacterMap* map, Tokenizer* tokenizer, Format format) : |
| mMap(map), mTokenizer(tokenizer), mFormat(format), mState(STATE_TOP) { |
| } |
| |
| status_t KeyCharacterMap::Parser::parse() { |
| while (!mTokenizer->isEof()) { |
| #if DEBUG_PARSER |
| ALOGD("Parsing %s: '%s'.", mTokenizer->getLocation().c_str(), |
| mTokenizer->peekRemainderOfLine().c_str()); |
| #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 == "map") { |
| mTokenizer->skipDelimiters(WHITESPACE); |
| status_t status = parseMap(); |
| 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().c_str(), |
| keywordToken.c_str()); |
| return BAD_VALUE; |
| } |
| break; |
| } |
| |
| case STATE_KEY: { |
| status_t status = parseKeyProperty(); |
| if (status) return status; |
| break; |
| } |
| } |
| |
| mTokenizer->skipDelimiters(WHITESPACE); |
| if (!mTokenizer->isEol() && mTokenizer->peekChar() != '#') { |
| ALOGE("%s: Expected end of line or trailing comment, got '%s'.", |
| mTokenizer->getLocation().c_str(), mTokenizer->peekRemainderOfLine().c_str()); |
| return BAD_VALUE; |
| } |
| } |
| |
| mTokenizer->nextLine(); |
| } |
| |
| if (mState != STATE_TOP) { |
| ALOGE("%s: Unterminated key description at end of file.", |
| mTokenizer->getLocation().c_str()); |
| return BAD_VALUE; |
| } |
| |
| if (mMap->mType == KeyboardType::UNKNOWN) { |
| ALOGE("%s: Keyboard layout missing required keyboard 'type' declaration.", |
| mTokenizer->getLocation().c_str()); |
| return BAD_VALUE; |
| } |
| |
| if (mFormat == Format::BASE) { |
| if (mMap->mType == KeyboardType::OVERLAY) { |
| ALOGE("%s: Base keyboard layout must specify a keyboard 'type' other than 'OVERLAY'.", |
| mTokenizer->getLocation().c_str()); |
| return BAD_VALUE; |
| } |
| } else if (mFormat == Format::OVERLAY) { |
| if (mMap->mType != KeyboardType::OVERLAY) { |
| ALOGE("%s: Overlay keyboard layout missing required keyboard " |
| "'type OVERLAY' declaration.", |
| mTokenizer->getLocation().c_str()); |
| return BAD_VALUE; |
| } |
| } |
| |
| return NO_ERROR; |
| } |
| |
| status_t KeyCharacterMap::Parser::parseType() { |
| if (mMap->mType != KeyboardType::UNKNOWN) { |
| ALOGE("%s: Duplicate keyboard 'type' declaration.", mTokenizer->getLocation().c_str()); |
| return BAD_VALUE; |
| } |
| |
| KeyboardType type; |
| String8 typeToken = mTokenizer->nextToken(WHITESPACE); |
| if (typeToken == "NUMERIC") { |
| type = KeyboardType::NUMERIC; |
| } else if (typeToken == "PREDICTIVE") { |
| type = KeyboardType::PREDICTIVE; |
| } else if (typeToken == "ALPHA") { |
| type = KeyboardType::ALPHA; |
| } else if (typeToken == "FULL") { |
| type = KeyboardType::FULL; |
| } else if (typeToken == "SPECIAL_FUNCTION") { |
| ALOGW("The SPECIAL_FUNCTION type is now declared in the device's IDC file, please set " |
| "the property 'keyboard.specialFunction' to '1' there instead."); |
| // TODO: return BAD_VALUE here in Q |
| type = KeyboardType::SPECIAL_FUNCTION; |
| } else if (typeToken == "OVERLAY") { |
| type = KeyboardType::OVERLAY; |
| } else { |
| ALOGE("%s: Expected keyboard type label, got '%s'.", mTokenizer->getLocation().c_str(), |
| typeToken.c_str()); |
| return BAD_VALUE; |
| } |
| |
| #if DEBUG_PARSER |
| ALOGD("Parsed type: type=%d.", type); |
| #endif |
| mMap->mType = type; |
| return NO_ERROR; |
| } |
| |
| status_t KeyCharacterMap::Parser::parseMap() { |
| String8 keywordToken = mTokenizer->nextToken(WHITESPACE); |
| if (keywordToken == "key") { |
| mTokenizer->skipDelimiters(WHITESPACE); |
| return parseMapKey(); |
| } |
| ALOGE("%s: Expected keyword after 'map', got '%s'.", mTokenizer->getLocation().c_str(), |
| keywordToken.c_str()); |
| return BAD_VALUE; |
| } |
| |
| status_t KeyCharacterMap::Parser::parseMapKey() { |
| String8 codeToken = mTokenizer->nextToken(WHITESPACE); |
| bool mapUsage = false; |
| if (codeToken == "usage") { |
| mapUsage = true; |
| mTokenizer->skipDelimiters(WHITESPACE); |
| codeToken = mTokenizer->nextToken(WHITESPACE); |
| } |
| |
| char* end; |
| int32_t code = int32_t(strtol(codeToken.c_str(), &end, 0)); |
| if (*end) { |
| ALOGE("%s: Expected key %s number, got '%s'.", mTokenizer->getLocation().c_str(), |
| mapUsage ? "usage" : "scan code", codeToken.c_str()); |
| return BAD_VALUE; |
| } |
| std::map<int32_t, int32_t>& map = mapUsage ? mMap->mKeysByUsageCode : mMap->mKeysByScanCode; |
| const auto it = map.find(code); |
| if (it != map.end()) { |
| ALOGE("%s: Duplicate entry for key %s '%s'.", mTokenizer->getLocation().c_str(), |
| mapUsage ? "usage" : "scan code", codeToken.c_str()); |
| return BAD_VALUE; |
| } |
| |
| mTokenizer->skipDelimiters(WHITESPACE); |
| String8 keyCodeToken = mTokenizer->nextToken(WHITESPACE); |
| std::optional<int> keyCode = InputEventLookup::getKeyCodeByLabel(keyCodeToken.c_str()); |
| if (!keyCode) { |
| ALOGE("%s: Expected key code label, got '%s'.", mTokenizer->getLocation().c_str(), |
| keyCodeToken.c_str()); |
| return BAD_VALUE; |
| } |
| |
| #if DEBUG_PARSER |
| ALOGD("Parsed map key %s: code=%d, keyCode=%d.", |
| mapUsage ? "usage" : "scan code", code, keyCode); |
| #endif |
| map.insert_or_assign(code, *keyCode); |
| return NO_ERROR; |
| } |
| |
| status_t KeyCharacterMap::Parser::parseKey() { |
| String8 keyCodeToken = mTokenizer->nextToken(WHITESPACE); |
| std::optional<int> keyCode = InputEventLookup::getKeyCodeByLabel(keyCodeToken.c_str()); |
| if (!keyCode) { |
| ALOGE("%s: Expected key code label, got '%s'.", mTokenizer->getLocation().c_str(), |
| keyCodeToken.c_str()); |
| return BAD_VALUE; |
| } |
| if (mMap->mKeys.find(*keyCode) != mMap->mKeys.end()) { |
| ALOGE("%s: Duplicate entry for key code '%s'.", mTokenizer->getLocation().c_str(), |
| keyCodeToken.c_str()); |
| return BAD_VALUE; |
| } |
| |
| mTokenizer->skipDelimiters(WHITESPACE); |
| String8 openBraceToken = mTokenizer->nextToken(WHITESPACE); |
| if (openBraceToken != "{") { |
| ALOGE("%s: Expected '{' after key code label, got '%s'.", mTokenizer->getLocation().c_str(), |
| openBraceToken.c_str()); |
| return BAD_VALUE; |
| } |
| |
| ALOGD_IF(DEBUG_PARSER, "Parsed beginning of key: keyCode=%d.", *keyCode); |
| mKeyCode = *keyCode; |
| mMap->mKeys.emplace(*keyCode, Key{}); |
| mState = STATE_KEY; |
| return NO_ERROR; |
| } |
| |
| status_t KeyCharacterMap::Parser::parseKeyProperty() { |
| Key& key = mMap->mKeys[mKeyCode]; |
| String8 token = mTokenizer->nextToken(WHITESPACE_OR_PROPERTY_DELIMITER); |
| if (token == "}") { |
| mState = STATE_TOP; |
| return finishKey(key); |
| } |
| |
| std::vector<Property> properties; |
| |
| // Parse all comma-delimited property names up to the first colon. |
| for (;;) { |
| if (token == "label") { |
| properties.emplace_back(PROPERTY_LABEL); |
| } else if (token == "number") { |
| properties.emplace_back(PROPERTY_NUMBER); |
| } else { |
| int32_t metaState; |
| status_t status = parseModifier(token.c_str(), &metaState); |
| if (status) { |
| ALOGE("%s: Expected a property name or modifier, got '%s'.", |
| mTokenizer->getLocation().c_str(), token.c_str()); |
| return status; |
| } |
| properties.emplace_back(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().c_str()); |
| return BAD_VALUE; |
| } |
| |
| // Parse behavior after the colon. |
| mTokenizer->skipDelimiters(WHITESPACE); |
| |
| Behavior behavior; |
| bool haveCharacter = false; |
| bool haveFallback = false; |
| bool haveReplacement = 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().c_str()); |
| return BAD_VALUE; |
| } |
| if (haveCharacter) { |
| ALOGE("%s: Cannot combine multiple character literals or 'none'.", |
| mTokenizer->getLocation().c_str()); |
| return BAD_VALUE; |
| } |
| if (haveReplacement) { |
| ALOGE("%s: Cannot combine character literal with replace action.", |
| mTokenizer->getLocation().c_str()); |
| 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().c_str()); |
| return BAD_VALUE; |
| } |
| if (haveReplacement) { |
| ALOGE("%s: Cannot combine 'none' with replace action.", |
| mTokenizer->getLocation().c_str()); |
| return BAD_VALUE; |
| } |
| haveCharacter = true; |
| } else if (token == "fallback") { |
| mTokenizer->skipDelimiters(WHITESPACE); |
| token = mTokenizer->nextToken(WHITESPACE); |
| std::optional<int> keyCode = InputEventLookup::getKeyCodeByLabel(token.c_str()); |
| if (!keyCode) { |
| ALOGE("%s: Invalid key code label for fallback behavior, got '%s'.", |
| mTokenizer->getLocation().c_str(), token.c_str()); |
| return BAD_VALUE; |
| } |
| if (haveFallback || haveReplacement) { |
| ALOGE("%s: Cannot combine multiple fallback/replacement key codes.", |
| mTokenizer->getLocation().c_str()); |
| return BAD_VALUE; |
| } |
| behavior.fallbackKeyCode = *keyCode; |
| haveFallback = true; |
| } else if (token == "replace") { |
| mTokenizer->skipDelimiters(WHITESPACE); |
| token = mTokenizer->nextToken(WHITESPACE); |
| std::optional<int> keyCode = InputEventLookup::getKeyCodeByLabel(token.c_str()); |
| if (!keyCode) { |
| ALOGE("%s: Invalid key code label for replace, got '%s'.", |
| mTokenizer->getLocation().c_str(), token.c_str()); |
| return BAD_VALUE; |
| } |
| if (haveCharacter) { |
| ALOGE("%s: Cannot combine character literal with replace action.", |
| mTokenizer->getLocation().c_str()); |
| return BAD_VALUE; |
| } |
| if (haveFallback || haveReplacement) { |
| ALOGE("%s: Cannot combine multiple fallback/replacement key codes.", |
| mTokenizer->getLocation().c_str()); |
| return BAD_VALUE; |
| } |
| behavior.replacementKeyCode = *keyCode; |
| haveReplacement = true; |
| |
| } else { |
| ALOGE("%s: Expected a key behavior after ':'.", mTokenizer->getLocation().c_str()); |
| return BAD_VALUE; |
| } |
| } |
| |
| mTokenizer->skipDelimiters(WHITESPACE); |
| } while (!mTokenizer->isEol() && mTokenizer->peekChar() != '#'); |
| |
| // Add the behavior. |
| for (const Property& property : properties) { |
| switch (property.property) { |
| case PROPERTY_LABEL: |
| if (key.label) { |
| ALOGE("%s: Duplicate label for key.", mTokenizer->getLocation().c_str()); |
| 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().c_str()); |
| 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 (const Behavior& b : key.behaviors) { |
| if (b.metaState == property.metaState) { |
| ALOGE("%s: Duplicate key behavior for modifier.", |
| mTokenizer->getLocation().c_str()); |
| return BAD_VALUE; |
| } |
| } |
| Behavior newBehavior = behavior; |
| newBehavior.metaState = property.metaState; |
| key.behaviors.push_front(newBehavior); |
| ALOGD_IF(DEBUG_PARSER, |
| "Parsed key meta: keyCode=%d, meta=0x%x, char=%d, fallback=%d replace=%d.", |
| mKeyCode, key.behaviors.front().metaState, key.behaviors.front().character, |
| key.behaviors.front().fallbackKeyCode, |
| key.behaviors.front().replacementKeyCode); |
| break; |
| } |
| } |
| } |
| return NO_ERROR; |
| } |
| |
| status_t KeyCharacterMap::Parser::finishKey(Key& key) { |
| // Fill in default number property. |
| if (!key.number) { |
| char16_t digit = 0; |
| char16_t symbol = 0; |
| for (const Behavior& b : key.behaviors) { |
| char16_t ch = b.character; |
| if (ch) { |
| if (ch >= '0' && ch <= '9') { |
| digit = ch; |
| } else if (ch == '(' || ch == ')' || ch == '#' || ch == '*' |
| || ch == '-' || ch == '+' || ch == ',' || ch == '.' |
| || ch == '\'' || ch == ':' || ch == ';' || ch == '/') { |
| symbol = ch; |
| } |
| } |
| } |
| key.number = digit ? digit : symbol; |
| } |
| return NO_ERROR; |
| } |
| |
| status_t KeyCharacterMap::Parser::parseModifier(const std::string& token, int32_t* outMetaState) { |
| if (token == "base") { |
| *outMetaState = 0; |
| return NO_ERROR; |
| } |
| |
| int32_t combinedMeta = 0; |
| |
| const char* str = token.c_str(); |
| 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().c_str(), |
| token.c_str()); |
| 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).empty()) { |
| return NO_ERROR; |
| } |
| |
| Error: |
| ALOGE("%s: Malformed character literal.", mTokenizer->getLocation().c_str()); |
| return BAD_VALUE; |
| } |
| |
| } // namespace android |
