839 lines
29 KiB
C++
839 lines
29 KiB
C++
/*
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* Copyright (C) 2008 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 "KeyCharacterMap"
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#include <stdlib.h>
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#include <string.h>
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#include <android/keycodes.h>
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#include <ui/Keyboard.h>
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#include <ui/KeyCharacterMap.h>
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#include <utils/Log.h>
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#include <utils/Errors.h>
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#include <utils/Tokenizer.h>
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#include <utils/Timers.h>
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// Enables debug output for the parser.
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#define DEBUG_PARSER 0
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// Enables debug output for parser performance.
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#define DEBUG_PARSER_PERFORMANCE 0
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// Enables debug output for mapping.
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#define DEBUG_MAPPING 0
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namespace android {
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static const char* WHITESPACE = " \t\r";
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static const char* WHITESPACE_OR_PROPERTY_DELIMITER = " \t\r,:";
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struct Modifier {
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const char* label;
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int32_t metaState;
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};
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static const Modifier modifiers[] = {
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{ "shift", AMETA_SHIFT_ON },
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{ "lshift", AMETA_SHIFT_LEFT_ON },
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{ "rshift", AMETA_SHIFT_RIGHT_ON },
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{ "alt", AMETA_ALT_ON },
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{ "lalt", AMETA_ALT_LEFT_ON },
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{ "ralt", AMETA_ALT_RIGHT_ON },
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{ "ctrl", AMETA_CTRL_ON },
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{ "lctrl", AMETA_CTRL_LEFT_ON },
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{ "rctrl", AMETA_CTRL_RIGHT_ON },
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{ "meta", AMETA_META_ON },
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{ "lmeta", AMETA_META_LEFT_ON },
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{ "rmeta", AMETA_META_RIGHT_ON },
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{ "sym", AMETA_SYM_ON },
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{ "fn", AMETA_FUNCTION_ON },
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{ "capslock", AMETA_CAPS_LOCK_ON },
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{ "numlock", AMETA_NUM_LOCK_ON },
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{ "scrolllock", AMETA_SCROLL_LOCK_ON },
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};
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#if DEBUG_MAPPING
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static String8 toString(const char16_t* chars, size_t numChars) {
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String8 result;
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for (size_t i = 0; i < numChars; i++) {
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result.appendFormat(i == 0 ? "%d" : ", %d", chars[i]);
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}
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return result;
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}
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#endif
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// --- KeyCharacterMap ---
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KeyCharacterMap::KeyCharacterMap() :
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mType(KEYBOARD_TYPE_UNKNOWN) {
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}
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KeyCharacterMap::~KeyCharacterMap() {
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for (size_t i = 0; i < mKeys.size(); i++) {
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Key* key = mKeys.editValueAt(i);
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delete key;
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}
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}
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status_t KeyCharacterMap::load(const String8& filename, KeyCharacterMap** outMap) {
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*outMap = NULL;
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Tokenizer* tokenizer;
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status_t status = Tokenizer::open(filename, &tokenizer);
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if (status) {
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ALOGE("Error %d opening key character map file %s.", status, filename.string());
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} else {
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KeyCharacterMap* map = new KeyCharacterMap();
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if (!map) {
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ALOGE("Error allocating key character map.");
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status = NO_MEMORY;
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} else {
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#if DEBUG_PARSER_PERFORMANCE
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nsecs_t startTime = systemTime(SYSTEM_TIME_MONOTONIC);
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#endif
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Parser parser(map, tokenizer);
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status = parser.parse();
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#if DEBUG_PARSER_PERFORMANCE
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nsecs_t elapsedTime = systemTime(SYSTEM_TIME_MONOTONIC) - startTime;
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ALOGD("Parsed key character map file '%s' %d lines in %0.3fms.",
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tokenizer->getFilename().string(), tokenizer->getLineNumber(),
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elapsedTime / 1000000.0);
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#endif
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if (status) {
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delete map;
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} else {
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*outMap = map;
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}
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}
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delete tokenizer;
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}
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return status;
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}
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int32_t KeyCharacterMap::getKeyboardType() const {
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return mType;
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}
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char16_t KeyCharacterMap::getDisplayLabel(int32_t keyCode) const {
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char16_t result = 0;
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const Key* key;
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if (getKey(keyCode, &key)) {
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result = key->label;
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}
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#if DEBUG_MAPPING
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ALOGD("getDisplayLabel: keyCode=%d ~ Result %d.", keyCode, result);
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#endif
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return result;
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}
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char16_t KeyCharacterMap::getNumber(int32_t keyCode) const {
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char16_t result = 0;
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const Key* key;
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if (getKey(keyCode, &key)) {
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result = key->number;
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}
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#if DEBUG_MAPPING
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ALOGD("getNumber: keyCode=%d ~ Result %d.", keyCode, result);
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#endif
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return result;
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}
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char16_t KeyCharacterMap::getCharacter(int32_t keyCode, int32_t metaState) const {
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char16_t result = 0;
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const Key* key;
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const Behavior* behavior;
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if (getKeyBehavior(keyCode, metaState, &key, &behavior)) {
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result = behavior->character;
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}
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#if DEBUG_MAPPING
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ALOGD("getCharacter: keyCode=%d, metaState=0x%08x ~ Result %d.", keyCode, metaState, result);
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#endif
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return result;
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}
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bool KeyCharacterMap::getFallbackAction(int32_t keyCode, int32_t metaState,
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FallbackAction* outFallbackAction) const {
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outFallbackAction->keyCode = 0;
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outFallbackAction->metaState = 0;
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bool result = false;
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const Key* key;
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const Behavior* behavior;
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if (getKeyBehavior(keyCode, metaState, &key, &behavior)) {
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if (behavior->fallbackKeyCode) {
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outFallbackAction->keyCode = behavior->fallbackKeyCode;
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outFallbackAction->metaState = metaState & ~behavior->metaState;
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result = true;
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}
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}
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#if DEBUG_MAPPING
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ALOGD("getFallbackKeyCode: keyCode=%d, metaState=0x%08x ~ Result %s, "
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"fallback keyCode=%d, fallback metaState=0x%08x.",
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keyCode, metaState, result ? "true" : "false",
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outFallbackAction->keyCode, outFallbackAction->metaState);
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#endif
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return result;
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}
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char16_t KeyCharacterMap::getMatch(int32_t keyCode, const char16_t* chars, size_t numChars,
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int32_t metaState) const {
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char16_t result = 0;
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const Key* key;
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if (getKey(keyCode, &key)) {
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// Try to find the most general behavior that maps to this character.
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// For example, the base key behavior will usually be last in the list.
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// However, if we find a perfect meta state match for one behavior then use that one.
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for (const Behavior* behavior = key->firstBehavior; behavior; behavior = behavior->next) {
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if (behavior->character) {
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for (size_t i = 0; i < numChars; i++) {
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if (behavior->character == chars[i]) {
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result = behavior->character;
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if ((behavior->metaState & metaState) == behavior->metaState) {
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goto ExactMatch;
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}
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break;
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}
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}
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}
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}
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ExactMatch: ;
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}
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#if DEBUG_MAPPING
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ALOGD("getMatch: keyCode=%d, chars=[%s], metaState=0x%08x ~ Result %d.",
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keyCode, toString(chars, numChars).string(), metaState, result);
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#endif
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return result;
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}
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bool KeyCharacterMap::getEvents(int32_t deviceId, const char16_t* chars, size_t numChars,
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Vector<KeyEvent>& outEvents) const {
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nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
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for (size_t i = 0; i < numChars; i++) {
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int32_t keyCode, metaState;
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char16_t ch = chars[i];
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if (!findKey(ch, &keyCode, &metaState)) {
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#if DEBUG_MAPPING
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ALOGD("getEvents: deviceId=%d, chars=[%s] ~ Failed to find mapping for character %d.",
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deviceId, toString(chars, numChars).string(), ch);
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#endif
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return false;
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}
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int32_t currentMetaState = 0;
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addMetaKeys(outEvents, deviceId, metaState, true, now, ¤tMetaState);
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addKey(outEvents, deviceId, keyCode, currentMetaState, true, now);
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addKey(outEvents, deviceId, keyCode, currentMetaState, false, now);
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addMetaKeys(outEvents, deviceId, metaState, false, now, ¤tMetaState);
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}
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#if DEBUG_MAPPING
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ALOGD("getEvents: deviceId=%d, chars=[%s] ~ Generated %d events.",
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deviceId, toString(chars, numChars).string(), int32_t(outEvents.size()));
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for (size_t i = 0; i < outEvents.size(); i++) {
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ALOGD(" Key: keyCode=%d, metaState=0x%08x, %s.",
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outEvents[i].getKeyCode(), outEvents[i].getMetaState(),
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outEvents[i].getAction() == AKEY_EVENT_ACTION_DOWN ? "down" : "up");
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}
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#endif
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return true;
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}
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bool KeyCharacterMap::getKey(int32_t keyCode, const Key** outKey) const {
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ssize_t index = mKeys.indexOfKey(keyCode);
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if (index >= 0) {
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*outKey = mKeys.valueAt(index);
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return true;
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}
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return false;
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}
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bool KeyCharacterMap::getKeyBehavior(int32_t keyCode, int32_t metaState,
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const Key** outKey, const Behavior** outBehavior) const {
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const Key* key;
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if (getKey(keyCode, &key)) {
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const Behavior* behavior = key->firstBehavior;
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while (behavior) {
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if ((behavior->metaState & metaState) == behavior->metaState) {
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*outKey = key;
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*outBehavior = behavior;
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return true;
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}
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behavior = behavior->next;
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}
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}
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return false;
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}
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bool KeyCharacterMap::findKey(char16_t ch, int32_t* outKeyCode, int32_t* outMetaState) const {
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if (!ch) {
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return false;
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}
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for (size_t i = 0; i < mKeys.size(); i++) {
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const Key* key = mKeys.valueAt(i);
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// Try to find the most general behavior that maps to this character.
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// For example, the base key behavior will usually be last in the list.
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const Behavior* found = NULL;
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for (const Behavior* behavior = key->firstBehavior; behavior; behavior = behavior->next) {
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if (behavior->character == ch) {
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found = behavior;
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}
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}
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if (found) {
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*outKeyCode = mKeys.keyAt(i);
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*outMetaState = found->metaState;
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return true;
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}
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}
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return false;
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}
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void KeyCharacterMap::addKey(Vector<KeyEvent>& outEvents,
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int32_t deviceId, int32_t keyCode, int32_t metaState, bool down, nsecs_t time) {
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outEvents.push();
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KeyEvent& event = outEvents.editTop();
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event.initialize(deviceId, AINPUT_SOURCE_KEYBOARD,
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down ? AKEY_EVENT_ACTION_DOWN : AKEY_EVENT_ACTION_UP,
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0, keyCode, 0, metaState, 0, time, time);
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}
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void KeyCharacterMap::addMetaKeys(Vector<KeyEvent>& outEvents,
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int32_t deviceId, int32_t metaState, bool down, nsecs_t time,
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int32_t* currentMetaState) {
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// Add and remove meta keys symmetrically.
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if (down) {
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addLockedMetaKey(outEvents, deviceId, metaState, time,
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AKEYCODE_CAPS_LOCK, AMETA_CAPS_LOCK_ON, currentMetaState);
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addLockedMetaKey(outEvents, deviceId, metaState, time,
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AKEYCODE_NUM_LOCK, AMETA_NUM_LOCK_ON, currentMetaState);
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addLockedMetaKey(outEvents, deviceId, metaState, time,
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AKEYCODE_SCROLL_LOCK, AMETA_SCROLL_LOCK_ON, currentMetaState);
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addDoubleEphemeralMetaKey(outEvents, deviceId, metaState, true, time,
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AKEYCODE_SHIFT_LEFT, AMETA_SHIFT_LEFT_ON,
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AKEYCODE_SHIFT_RIGHT, AMETA_SHIFT_RIGHT_ON,
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AMETA_SHIFT_ON, currentMetaState);
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addDoubleEphemeralMetaKey(outEvents, deviceId, metaState, true, time,
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AKEYCODE_ALT_LEFT, AMETA_ALT_LEFT_ON,
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AKEYCODE_ALT_RIGHT, AMETA_ALT_RIGHT_ON,
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AMETA_ALT_ON, currentMetaState);
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addDoubleEphemeralMetaKey(outEvents, deviceId, metaState, true, time,
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AKEYCODE_CTRL_LEFT, AMETA_CTRL_LEFT_ON,
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AKEYCODE_CTRL_RIGHT, AMETA_CTRL_RIGHT_ON,
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AMETA_CTRL_ON, currentMetaState);
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addDoubleEphemeralMetaKey(outEvents, deviceId, metaState, true, time,
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AKEYCODE_META_LEFT, AMETA_META_LEFT_ON,
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AKEYCODE_META_RIGHT, AMETA_META_RIGHT_ON,
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AMETA_META_ON, currentMetaState);
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addSingleEphemeralMetaKey(outEvents, deviceId, metaState, true, time,
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AKEYCODE_SYM, AMETA_SYM_ON, currentMetaState);
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addSingleEphemeralMetaKey(outEvents, deviceId, metaState, true, time,
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AKEYCODE_FUNCTION, AMETA_FUNCTION_ON, currentMetaState);
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} else {
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addSingleEphemeralMetaKey(outEvents, deviceId, metaState, false, time,
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AKEYCODE_FUNCTION, AMETA_FUNCTION_ON, currentMetaState);
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addSingleEphemeralMetaKey(outEvents, deviceId, metaState, false, time,
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AKEYCODE_SYM, AMETA_SYM_ON, currentMetaState);
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addDoubleEphemeralMetaKey(outEvents, deviceId, metaState, false, time,
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AKEYCODE_META_LEFT, AMETA_META_LEFT_ON,
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AKEYCODE_META_RIGHT, AMETA_META_RIGHT_ON,
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AMETA_META_ON, currentMetaState);
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addDoubleEphemeralMetaKey(outEvents, deviceId, metaState, false, time,
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AKEYCODE_CTRL_LEFT, AMETA_CTRL_LEFT_ON,
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AKEYCODE_CTRL_RIGHT, AMETA_CTRL_RIGHT_ON,
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AMETA_CTRL_ON, currentMetaState);
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addDoubleEphemeralMetaKey(outEvents, deviceId, metaState, false, time,
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AKEYCODE_ALT_LEFT, AMETA_ALT_LEFT_ON,
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AKEYCODE_ALT_RIGHT, AMETA_ALT_RIGHT_ON,
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AMETA_ALT_ON, currentMetaState);
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addDoubleEphemeralMetaKey(outEvents, deviceId, metaState, false, time,
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AKEYCODE_SHIFT_LEFT, AMETA_SHIFT_LEFT_ON,
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AKEYCODE_SHIFT_RIGHT, AMETA_SHIFT_RIGHT_ON,
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AMETA_SHIFT_ON, currentMetaState);
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addLockedMetaKey(outEvents, deviceId, metaState, time,
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AKEYCODE_SCROLL_LOCK, AMETA_SCROLL_LOCK_ON, currentMetaState);
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addLockedMetaKey(outEvents, deviceId, metaState, time,
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AKEYCODE_NUM_LOCK, AMETA_NUM_LOCK_ON, currentMetaState);
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addLockedMetaKey(outEvents, deviceId, metaState, time,
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AKEYCODE_CAPS_LOCK, AMETA_CAPS_LOCK_ON, currentMetaState);
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}
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}
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bool KeyCharacterMap::addSingleEphemeralMetaKey(Vector<KeyEvent>& outEvents,
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int32_t deviceId, int32_t metaState, bool down, nsecs_t time,
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int32_t keyCode, int32_t keyMetaState,
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int32_t* currentMetaState) {
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if ((metaState & keyMetaState) == keyMetaState) {
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*currentMetaState = updateMetaState(keyCode, down, *currentMetaState);
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addKey(outEvents, deviceId, keyCode, *currentMetaState, down, time);
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return true;
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}
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return false;
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}
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void KeyCharacterMap::addDoubleEphemeralMetaKey(Vector<KeyEvent>& outEvents,
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int32_t deviceId, int32_t metaState, bool down, nsecs_t time,
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int32_t leftKeyCode, int32_t leftKeyMetaState,
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int32_t rightKeyCode, int32_t rightKeyMetaState,
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int32_t eitherKeyMetaState,
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int32_t* currentMetaState) {
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bool specific = false;
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specific |= addSingleEphemeralMetaKey(outEvents, deviceId, metaState, down, time,
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leftKeyCode, leftKeyMetaState, currentMetaState);
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specific |= addSingleEphemeralMetaKey(outEvents, deviceId, metaState, down, time,
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rightKeyCode, rightKeyMetaState, currentMetaState);
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if (!specific) {
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addSingleEphemeralMetaKey(outEvents, deviceId, metaState, down, time,
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leftKeyCode, eitherKeyMetaState, currentMetaState);
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}
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}
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void KeyCharacterMap::addLockedMetaKey(Vector<KeyEvent>& outEvents,
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int32_t deviceId, int32_t metaState, nsecs_t time,
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int32_t keyCode, int32_t keyMetaState,
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int32_t* currentMetaState) {
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if ((metaState & keyMetaState) == keyMetaState) {
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*currentMetaState = updateMetaState(keyCode, true, *currentMetaState);
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addKey(outEvents, deviceId, keyCode, *currentMetaState, true, time);
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*currentMetaState = updateMetaState(keyCode, false, *currentMetaState);
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addKey(outEvents, deviceId, keyCode, *currentMetaState, false, time);
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}
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}
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// --- KeyCharacterMap::Key ---
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KeyCharacterMap::Key::Key() :
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label(0), number(0), firstBehavior(NULL) {
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}
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KeyCharacterMap::Key::~Key() {
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Behavior* behavior = firstBehavior;
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while (behavior) {
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Behavior* next = behavior->next;
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delete behavior;
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behavior = next;
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}
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}
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// --- KeyCharacterMap::Behavior ---
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KeyCharacterMap::Behavior::Behavior() :
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next(NULL), metaState(0), character(0), fallbackKeyCode(0) {
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}
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// --- KeyCharacterMap::Parser ---
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KeyCharacterMap::Parser::Parser(KeyCharacterMap* map, Tokenizer* tokenizer) :
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mMap(map), mTokenizer(tokenizer), mState(STATE_TOP) {
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}
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KeyCharacterMap::Parser::~Parser() {
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}
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status_t KeyCharacterMap::Parser::parse() {
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while (!mTokenizer->isEof()) {
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#if DEBUG_PARSER
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ALOGD("Parsing %s: '%s'.", mTokenizer->getLocation().string(),
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mTokenizer->peekRemainderOfLine().string());
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#endif
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mTokenizer->skipDelimiters(WHITESPACE);
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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
|