882b0a59d8
Stop using system properties to publish information about the key character map path. Instead, we can retrieve it on demand by asking the window manager. It was possible to exhaust the supply of system properties when repeatedly adding and removing input devices. Bug: 5532806 Change-Id: Idd361a24ad7db2edc185c8546db7fb05f9c28669
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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LOGE("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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LOGE("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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LOGE("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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