304 lines
9.2 KiB
C++
304 lines
9.2 KiB
C++
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "Keyboard"
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#include <stdlib.h>
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#include <unistd.h>
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#include <limits.h>
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#include <ui/Keyboard.h>
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#include <ui/KeycodeLabels.h>
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#include <ui/KeyLayoutMap.h>
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#include <ui/KeyCharacterMap.h>
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#include <utils/Errors.h>
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#include <utils/Log.h>
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#include <cutils/properties.h>
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namespace android {
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// --- KeyMap ---
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KeyMap::KeyMap() :
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keyLayoutMap(NULL), keyCharacterMap(NULL) {
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}
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KeyMap::~KeyMap() {
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delete keyLayoutMap;
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delete keyCharacterMap;
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}
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status_t KeyMap::load(const InputDeviceIdentifier& deviceIdenfifier,
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const PropertyMap* deviceConfiguration) {
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// Use the configured key layout if available.
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if (deviceConfiguration) {
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String8 keyLayoutName;
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if (deviceConfiguration->tryGetProperty(String8("keyboard.layout"),
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keyLayoutName)) {
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status_t status = loadKeyLayout(deviceIdenfifier, keyLayoutName);
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if (status == NAME_NOT_FOUND) {
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ALOGE("Configuration for keyboard device '%s' requested keyboard layout '%s' but "
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"it was not found.",
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deviceIdenfifier.name.string(), keyLayoutName.string());
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}
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}
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String8 keyCharacterMapName;
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if (deviceConfiguration->tryGetProperty(String8("keyboard.characterMap"),
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keyCharacterMapName)) {
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status_t status = loadKeyCharacterMap(deviceIdenfifier, keyCharacterMapName);
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if (status == NAME_NOT_FOUND) {
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ALOGE("Configuration for keyboard device '%s' requested keyboard character "
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"map '%s' but it was not found.",
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deviceIdenfifier.name.string(), keyLayoutName.string());
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}
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}
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if (isComplete()) {
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return OK;
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}
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}
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// Try searching by device identifier.
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if (probeKeyMap(deviceIdenfifier, String8::empty())) {
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return OK;
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}
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// Fall back on the Generic key map.
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// TODO Apply some additional heuristics here to figure out what kind of
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// generic key map to use (US English, etc.) for typical external keyboards.
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if (probeKeyMap(deviceIdenfifier, String8("Generic"))) {
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return OK;
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}
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// Try the Virtual key map as a last resort.
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if (probeKeyMap(deviceIdenfifier, String8("Virtual"))) {
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return OK;
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}
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// Give up!
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ALOGE("Could not determine key map for device '%s' and no default key maps were found!",
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deviceIdenfifier.name.string());
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return NAME_NOT_FOUND;
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}
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bool KeyMap::probeKeyMap(const InputDeviceIdentifier& deviceIdentifier,
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const String8& keyMapName) {
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if (!haveKeyLayout()) {
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loadKeyLayout(deviceIdentifier, keyMapName);
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}
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if (!haveKeyCharacterMap()) {
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loadKeyCharacterMap(deviceIdentifier, keyMapName);
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}
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return isComplete();
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}
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status_t KeyMap::loadKeyLayout(const InputDeviceIdentifier& deviceIdentifier,
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const String8& name) {
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String8 path(getPath(deviceIdentifier, name,
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INPUT_DEVICE_CONFIGURATION_FILE_TYPE_KEY_LAYOUT));
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if (path.isEmpty()) {
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return NAME_NOT_FOUND;
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}
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KeyLayoutMap* map;
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status_t status = KeyLayoutMap::load(path, &map);
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if (status) {
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return status;
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}
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keyLayoutFile.setTo(path);
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keyLayoutMap = map;
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return OK;
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}
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status_t KeyMap::loadKeyCharacterMap(const InputDeviceIdentifier& deviceIdentifier,
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const String8& name) {
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String8 path(getPath(deviceIdentifier, name,
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INPUT_DEVICE_CONFIGURATION_FILE_TYPE_KEY_CHARACTER_MAP));
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if (path.isEmpty()) {
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return NAME_NOT_FOUND;
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}
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KeyCharacterMap* map;
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status_t status = KeyCharacterMap::load(path, &map);
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if (status) {
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return status;
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}
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keyCharacterMapFile.setTo(path);
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keyCharacterMap = map;
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return OK;
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}
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String8 KeyMap::getPath(const InputDeviceIdentifier& deviceIdentifier,
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const String8& name, InputDeviceConfigurationFileType type) {
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return name.isEmpty()
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? getInputDeviceConfigurationFilePathByDeviceIdentifier(deviceIdentifier, type)
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: getInputDeviceConfigurationFilePathByName(name, type);
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}
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// --- Global functions ---
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bool isEligibleBuiltInKeyboard(const InputDeviceIdentifier& deviceIdentifier,
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const PropertyMap* deviceConfiguration, const KeyMap* keyMap) {
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if (!keyMap->haveKeyCharacterMap()
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|| keyMap->keyCharacterMap->getKeyboardType()
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== KeyCharacterMap::KEYBOARD_TYPE_SPECIAL_FUNCTION) {
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return false;
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}
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if (deviceConfiguration) {
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bool builtIn = false;
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if (deviceConfiguration->tryGetProperty(String8("keyboard.builtIn"), builtIn)
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&& builtIn) {
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return true;
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}
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}
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return strstr(deviceIdentifier.name.string(), "-keypad");
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}
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static int lookupValueByLabel(const char* literal, const KeycodeLabel *list) {
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while (list->literal) {
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if (strcmp(literal, list->literal) == 0) {
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return list->value;
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}
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list++;
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}
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return list->value;
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}
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static const char* lookupLabelByValue(int value, const KeycodeLabel *list) {
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while (list->literal) {
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if (list->value == value) {
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return list->literal;
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}
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list++;
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}
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return NULL;
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}
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int32_t getKeyCodeByLabel(const char* label) {
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return int32_t(lookupValueByLabel(label, KEYCODES));
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}
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uint32_t getKeyFlagByLabel(const char* label) {
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return uint32_t(lookupValueByLabel(label, FLAGS));
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}
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int32_t getAxisByLabel(const char* label) {
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return int32_t(lookupValueByLabel(label, AXES));
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}
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const char* getAxisLabel(int32_t axisId) {
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return lookupLabelByValue(axisId, AXES);
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}
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static int32_t setEphemeralMetaState(int32_t mask, bool down, int32_t oldMetaState) {
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int32_t newMetaState;
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if (down) {
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newMetaState = oldMetaState | mask;
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} else {
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newMetaState = oldMetaState &
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~(mask | AMETA_ALT_ON | AMETA_SHIFT_ON | AMETA_CTRL_ON | AMETA_META_ON);
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}
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if (newMetaState & (AMETA_ALT_LEFT_ON | AMETA_ALT_RIGHT_ON)) {
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newMetaState |= AMETA_ALT_ON;
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}
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if (newMetaState & (AMETA_SHIFT_LEFT_ON | AMETA_SHIFT_RIGHT_ON)) {
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newMetaState |= AMETA_SHIFT_ON;
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}
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if (newMetaState & (AMETA_CTRL_LEFT_ON | AMETA_CTRL_RIGHT_ON)) {
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newMetaState |= AMETA_CTRL_ON;
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}
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if (newMetaState & (AMETA_META_LEFT_ON | AMETA_META_RIGHT_ON)) {
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newMetaState |= AMETA_META_ON;
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}
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return newMetaState;
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}
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static int32_t toggleLockedMetaState(int32_t mask, bool down, int32_t oldMetaState) {
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if (down) {
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return oldMetaState;
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} else {
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return oldMetaState ^ mask;
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}
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}
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int32_t updateMetaState(int32_t keyCode, bool down, int32_t oldMetaState) {
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int32_t mask;
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switch (keyCode) {
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case AKEYCODE_ALT_LEFT:
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return setEphemeralMetaState(AMETA_ALT_LEFT_ON, down, oldMetaState);
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case AKEYCODE_ALT_RIGHT:
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return setEphemeralMetaState(AMETA_ALT_RIGHT_ON, down, oldMetaState);
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case AKEYCODE_SHIFT_LEFT:
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return setEphemeralMetaState(AMETA_SHIFT_LEFT_ON, down, oldMetaState);
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case AKEYCODE_SHIFT_RIGHT:
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return setEphemeralMetaState(AMETA_SHIFT_RIGHT_ON, down, oldMetaState);
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case AKEYCODE_SYM:
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return setEphemeralMetaState(AMETA_SYM_ON, down, oldMetaState);
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case AKEYCODE_FUNCTION:
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return setEphemeralMetaState(AMETA_FUNCTION_ON, down, oldMetaState);
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case AKEYCODE_CTRL_LEFT:
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return setEphemeralMetaState(AMETA_CTRL_LEFT_ON, down, oldMetaState);
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case AKEYCODE_CTRL_RIGHT:
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return setEphemeralMetaState(AMETA_CTRL_RIGHT_ON, down, oldMetaState);
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case AKEYCODE_META_LEFT:
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return setEphemeralMetaState(AMETA_META_LEFT_ON, down, oldMetaState);
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case AKEYCODE_META_RIGHT:
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return setEphemeralMetaState(AMETA_META_RIGHT_ON, down, oldMetaState);
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case AKEYCODE_CAPS_LOCK:
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return toggleLockedMetaState(AMETA_CAPS_LOCK_ON, down, oldMetaState);
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case AKEYCODE_NUM_LOCK:
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return toggleLockedMetaState(AMETA_NUM_LOCK_ON, down, oldMetaState);
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case AKEYCODE_SCROLL_LOCK:
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return toggleLockedMetaState(AMETA_SCROLL_LOCK_ON, down, oldMetaState);
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default:
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return oldMetaState;
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}
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}
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bool isMetaKey(int32_t keyCode) {
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switch (keyCode) {
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case AKEYCODE_ALT_LEFT:
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case AKEYCODE_ALT_RIGHT:
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case AKEYCODE_SHIFT_LEFT:
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case AKEYCODE_SHIFT_RIGHT:
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case AKEYCODE_SYM:
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case AKEYCODE_FUNCTION:
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case AKEYCODE_CTRL_LEFT:
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case AKEYCODE_CTRL_RIGHT:
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case AKEYCODE_META_LEFT:
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case AKEYCODE_META_RIGHT:
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case AKEYCODE_CAPS_LOCK:
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case AKEYCODE_NUM_LOCK:
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case AKEYCODE_SCROLL_LOCK:
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return true;
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default:
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return false;
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}
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}
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} // namespace android
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