1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "VirtualKeyMap"
#include <stdlib.h>
#include <string.h>
#include <ui/VirtualKeyMap.h>
#include <utils/Log.h>
#include <utils/Errors.h>
#include <utils/Tokenizer.h>
#include <utils/Timers.h>
// Enables debug output for the parser.
#define DEBUG_PARSER 0
// Enables debug output for parser performance.
#define DEBUG_PARSER_PERFORMANCE 0
namespace android {
static const char* WHITESPACE = " \t\r";
static const char* WHITESPACE_OR_FIELD_DELIMITER = " \t\r:";
// --- VirtualKeyMap ---
VirtualKeyMap::VirtualKeyMap() {
}
VirtualKeyMap::~VirtualKeyMap() {
}
status_t VirtualKeyMap::load(const String8& filename, VirtualKeyMap** outMap) {
*outMap = NULL;
Tokenizer* tokenizer;
status_t status = Tokenizer::open(filename, &tokenizer);
if (status) {
LOGE("Error %d opening virtual key map file %s.", status, filename.string());
} else {
VirtualKeyMap* map = new VirtualKeyMap();
if (!map) {
LOGE("Error allocating virtual key map.");
status = NO_MEMORY;
} else {
#if DEBUG_PARSER_PERFORMANCE
nsecs_t startTime = systemTime(SYSTEM_TIME_MONOTONIC);
#endif
Parser parser(map, tokenizer);
status = parser.parse();
#if DEBUG_PARSER_PERFORMANCE
nsecs_t elapsedTime = systemTime(SYSTEM_TIME_MONOTONIC) - startTime;
ALOGD("Parsed key character map file '%s' %d lines in %0.3fms.",
tokenizer->getFilename().string(), tokenizer->getLineNumber(),
elapsedTime / 1000000.0);
#endif
if (status) {
delete map;
} else {
*outMap = map;
}
}
delete tokenizer;
}
return status;
}
// --- VirtualKeyMap::Parser ---
VirtualKeyMap::Parser::Parser(VirtualKeyMap* map, Tokenizer* tokenizer) :
mMap(map), mTokenizer(tokenizer) {
}
VirtualKeyMap::Parser::~Parser() {
}
status_t VirtualKeyMap::Parser::parse() {
while (!mTokenizer->isEof()) {
#if DEBUG_PARSER
ALOGD("Parsing %s: '%s'.", mTokenizer->getLocation().string(),
mTokenizer->peekRemainderOfLine().string());
#endif
mTokenizer->skipDelimiters(WHITESPACE);
if (!mTokenizer->isEol() && mTokenizer->peekChar() != '#') {
// Multiple keys can appear on one line or they can be broken up across multiple lines.
do {
String8 token = mTokenizer->nextToken(WHITESPACE_OR_FIELD_DELIMITER);
if (token != "0x01") {
LOGE("%s: Unknown virtual key type, expected 0x01.",
mTokenizer->getLocation().string());
return BAD_VALUE;
}
VirtualKeyDefinition defn;
bool success = parseNextIntField(&defn.scanCode)
&& parseNextIntField(&defn.centerX)
&& parseNextIntField(&defn.centerY)
&& parseNextIntField(&defn.width)
&& parseNextIntField(&defn.height);
if (!success) {
LOGE("%s: Expected 5 colon-delimited integers in virtual key definition.",
mTokenizer->getLocation().string());
return BAD_VALUE;
}
#if DEBUG_PARSER
ALOGD("Parsed virtual key: scanCode=%d, centerX=%d, centerY=%d, "
"width=%d, height=%d",
defn.scanCode, defn.centerX, defn.centerY, defn.width, defn.height);
#endif
mMap->mVirtualKeys.push(defn);
} while (consumeFieldDelimiterAndSkipWhitespace());
if (!mTokenizer->isEol()) {
LOGE("%s: Expected end of line, got '%s'.",
mTokenizer->getLocation().string(),
mTokenizer->peekRemainderOfLine().string());
return BAD_VALUE;
}
}
mTokenizer->nextLine();
}
return NO_ERROR;
}
bool VirtualKeyMap::Parser::consumeFieldDelimiterAndSkipWhitespace() {
mTokenizer->skipDelimiters(WHITESPACE);
if (mTokenizer->peekChar() == ':') {
mTokenizer->nextChar();
mTokenizer->skipDelimiters(WHITESPACE);
return true;
}
return false;
}
bool VirtualKeyMap::Parser::parseNextIntField(int32_t* outValue) {
if (!consumeFieldDelimiterAndSkipWhitespace()) {
return false;
}
String8 token = mTokenizer->nextToken(WHITESPACE_OR_FIELD_DELIMITER);
char* end;
*outValue = strtol(token.string(), &end, 0);
if (token.isEmpty() || *end != '\0') {
LOGE("Expected an integer, got '%s'.", token.string());
return false;
}
return true;
}
} // namespace android
|
