blob: 2ba1673d35b7c02066624f3e2872c876a4a09db5 [file] [log] [blame]
Jeff Brown90655042010-12-02 13:50:46 -08001/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#define LOG_TAG "VirtualKeyMap"
18
19#include <stdlib.h>
20#include <string.h>
Mathias Agopianb93a03f2012-02-17 15:34:57 -080021#include <androidfw/VirtualKeyMap.h>
Jeff Brown90655042010-12-02 13:50:46 -080022#include <utils/Log.h>
23#include <utils/Errors.h>
24#include <utils/Tokenizer.h>
25#include <utils/Timers.h>
26
27// Enables debug output for the parser.
28#define DEBUG_PARSER 0
29
30// Enables debug output for parser performance.
31#define DEBUG_PARSER_PERFORMANCE 0
32
33
34namespace android {
35
36static const char* WHITESPACE = " \t\r";
37static const char* WHITESPACE_OR_FIELD_DELIMITER = " \t\r:";
38
39
40// --- VirtualKeyMap ---
41
42VirtualKeyMap::VirtualKeyMap() {
43}
44
45VirtualKeyMap::~VirtualKeyMap() {
46}
47
48status_t VirtualKeyMap::load(const String8& filename, VirtualKeyMap** outMap) {
49 *outMap = NULL;
50
51 Tokenizer* tokenizer;
52 status_t status = Tokenizer::open(filename, &tokenizer);
53 if (status) {
Steve Block3762c312012-01-06 19:20:56 +000054 ALOGE("Error %d opening virtual key map file %s.", status, filename.string());
Jeff Brown90655042010-12-02 13:50:46 -080055 } else {
56 VirtualKeyMap* map = new VirtualKeyMap();
57 if (!map) {
Steve Block3762c312012-01-06 19:20:56 +000058 ALOGE("Error allocating virtual key map.");
Jeff Brown90655042010-12-02 13:50:46 -080059 status = NO_MEMORY;
60 } else {
61#if DEBUG_PARSER_PERFORMANCE
62 nsecs_t startTime = systemTime(SYSTEM_TIME_MONOTONIC);
63#endif
64 Parser parser(map, tokenizer);
65 status = parser.parse();
66#if DEBUG_PARSER_PERFORMANCE
67 nsecs_t elapsedTime = systemTime(SYSTEM_TIME_MONOTONIC) - startTime;
Steve Block5baa3a62011-12-20 16:23:08 +000068 ALOGD("Parsed key character map file '%s' %d lines in %0.3fms.",
Jeff Brown90655042010-12-02 13:50:46 -080069 tokenizer->getFilename().string(), tokenizer->getLineNumber(),
70 elapsedTime / 1000000.0);
71#endif
72 if (status) {
73 delete map;
74 } else {
75 *outMap = map;
76 }
77 }
78 delete tokenizer;
79 }
80 return status;
81}
82
83
84// --- VirtualKeyMap::Parser ---
85
86VirtualKeyMap::Parser::Parser(VirtualKeyMap* map, Tokenizer* tokenizer) :
87 mMap(map), mTokenizer(tokenizer) {
88}
89
90VirtualKeyMap::Parser::~Parser() {
91}
92
93status_t VirtualKeyMap::Parser::parse() {
94 while (!mTokenizer->isEof()) {
95#if DEBUG_PARSER
Steve Block5baa3a62011-12-20 16:23:08 +000096 ALOGD("Parsing %s: '%s'.", mTokenizer->getLocation().string(),
Jeff Brown90655042010-12-02 13:50:46 -080097 mTokenizer->peekRemainderOfLine().string());
98#endif
99
100 mTokenizer->skipDelimiters(WHITESPACE);
101
102 if (!mTokenizer->isEol() && mTokenizer->peekChar() != '#') {
103 // Multiple keys can appear on one line or they can be broken up across multiple lines.
104 do {
105 String8 token = mTokenizer->nextToken(WHITESPACE_OR_FIELD_DELIMITER);
106 if (token != "0x01") {
Steve Block3762c312012-01-06 19:20:56 +0000107 ALOGE("%s: Unknown virtual key type, expected 0x01.",
Jeff Brown90655042010-12-02 13:50:46 -0800108 mTokenizer->getLocation().string());
109 return BAD_VALUE;
110 }
111
112 VirtualKeyDefinition defn;
113 bool success = parseNextIntField(&defn.scanCode)
114 && parseNextIntField(&defn.centerX)
115 && parseNextIntField(&defn.centerY)
116 && parseNextIntField(&defn.width)
117 && parseNextIntField(&defn.height);
118 if (!success) {
Steve Block3762c312012-01-06 19:20:56 +0000119 ALOGE("%s: Expected 5 colon-delimited integers in virtual key definition.",
Jeff Brown90655042010-12-02 13:50:46 -0800120 mTokenizer->getLocation().string());
121 return BAD_VALUE;
122 }
123
124#if DEBUG_PARSER
Steve Block5baa3a62011-12-20 16:23:08 +0000125 ALOGD("Parsed virtual key: scanCode=%d, centerX=%d, centerY=%d, "
Jeff Brown90655042010-12-02 13:50:46 -0800126 "width=%d, height=%d",
127 defn.scanCode, defn.centerX, defn.centerY, defn.width, defn.height);
128#endif
129 mMap->mVirtualKeys.push(defn);
130 } while (consumeFieldDelimiterAndSkipWhitespace());
131
132 if (!mTokenizer->isEol()) {
Steve Block3762c312012-01-06 19:20:56 +0000133 ALOGE("%s: Expected end of line, got '%s'.",
Jeff Brown90655042010-12-02 13:50:46 -0800134 mTokenizer->getLocation().string(),
135 mTokenizer->peekRemainderOfLine().string());
136 return BAD_VALUE;
137 }
138 }
139
140 mTokenizer->nextLine();
141 }
142
143 return NO_ERROR;
144}
145
146bool VirtualKeyMap::Parser::consumeFieldDelimiterAndSkipWhitespace() {
147 mTokenizer->skipDelimiters(WHITESPACE);
148 if (mTokenizer->peekChar() == ':') {
149 mTokenizer->nextChar();
150 mTokenizer->skipDelimiters(WHITESPACE);
151 return true;
152 }
153 return false;
154}
155
156bool VirtualKeyMap::Parser::parseNextIntField(int32_t* outValue) {
157 if (!consumeFieldDelimiterAndSkipWhitespace()) {
158 return false;
159 }
160
161 String8 token = mTokenizer->nextToken(WHITESPACE_OR_FIELD_DELIMITER);
162 char* end;
163 *outValue = strtol(token.string(), &end, 0);
164 if (token.isEmpty() || *end != '\0') {
Steve Block3762c312012-01-06 19:20:56 +0000165 ALOGE("Expected an integer, got '%s'.", token.string());
Jeff Brown90655042010-12-02 13:50:46 -0800166 return false;
167 }
168 return true;
169}
170
171} // namespace android