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
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
|
// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
/**
* @fileoverview A class for loading and storing the maps for math atoms from
* JSON files. The class (and entries) can then be used as via the
* background page.
*/
goog.provide('cvox.MathMap');
goog.require('cvox.MathCompoundStore');
goog.require('cvox.MathUtil');
/**
*
* @constructor
*/
cvox.MathMap = function() {
/**
* The compund store for symbol and function mappings.
* @type {cvox.MathCompoundStore}
*/
this.store = cvox.MathCompoundStore.getInstance();
cvox.MathMap.parseFiles(
cvox.MathMap.FUNCTIONS_FILES_.map(
function(file) {
return cvox.MathMap.FUNCTIONS_PATH_ + file;
}))
.forEach(goog.bind(this.store.addFunctionRules, this.store));
cvox.MathMap.parseFiles(
cvox.MathMap.SYMBOLS_FILES_.map(
function(file) {
return cvox.MathMap.SYMBOLS_PATH_ + file;
}))
.forEach(goog.bind(this.store.addSymbolRules, this.store));
var cstrValues = this.store.getDynamicConstraintValues();
/**
* Array of domain names.
* @type {Array.<string>}
*/
this.allDomains = cstrValues.domain;
/**
* Array of style names.
* @type {Array.<string>}
*/
this.allStyles = cstrValues.style;
};
/**
* Stringifies MathMap into JSON object.
* @return {string} The stringified version of the mapping.
*/
cvox.MathMap.prototype.stringify = function() {
return JSON.stringify(this);
};
/**
* Path to dir containing ChromeVox JSON definitions for math speak.
* @type {string}
* @const
* @private
*/
cvox.MathMap.MATHMAP_PATH_ = 'chromevox/background/mathmaps/';
/**
* Subpath to dir containing ChromeVox JSON definitions for symbols.
* @type {string}
* @const
* @private
*/
cvox.MathMap.SYMBOLS_PATH_ = cvox.MathMap.MATHMAP_PATH_ + 'symbols/';
/**
* Subpath to dir containing ChromeVox JSON definitions for functions.
* @type {string}
* @const
* @private
*/
cvox.MathMap.FUNCTIONS_PATH_ = cvox.MathMap.MATHMAP_PATH_ + 'functions/';
/**
* Array of JSON filenames containing symbol definitions for math speak.
* @type {Array.<string>}
* @const
* @private
*/
cvox.MathMap.SYMBOLS_FILES_ = [
// Greek
'greek-capital.json', 'greek-small.json', 'greek-scripts.json',
'greek-mathfonts.json', 'greek-symbols.json',
// Hebrew
'hebrew_letters.json',
// Latin
'latin-lower-double-accent.json', 'latin-lower-normal.json',
'latin-lower-phonetic.json', 'latin-lower-single-accent.json',
'latin-rest.json', 'latin-upper-double-accent.json',
'latin-upper-normal.json', 'latin-upper-single-accent.json',
'latin-mathfonts.json',
// Math Symbols
'math_angles.json', 'math_arrows.json', 'math_characters.json',
'math_delimiters.json', 'math_digits.json', 'math_geometry.json',
'math_harpoons.json', 'math_non_characters.json', 'math_symbols.json',
'math_whitespace.json', 'other_stars.json'
];
/**
* Array of JSON filenames containing symbol definitions for math speak.
* @type {Array.<string>}
* @const
* @private
*/
cvox.MathMap.FUNCTIONS_FILES_ = [
'algebra.json', 'elementary.json', 'hyperbolic.json', 'trigonometry.json'
];
/**
* Loads JSON for a given file name.
* @param {string} file A valid filename.
* @return {string} A string representing JSON array.
*/
cvox.MathMap.loadFile = function(file) {
try {
return cvox.MathMap.readJSON_(file);
} catch (x) {
console.log('Unable to load file: ' + file + ', error: ' + x);
}
};
/**
* Loads a list of JSON files.
* @param {Array.<string>} files An array of valid filenames.
* @return {Array.<string>} A string representing JSON array.
*/
cvox.MathMap.loadFiles = function(files) {
return files.map(cvox.MathMap.loadFile);
};
/**
* Creates an array of JSON objects from a list of files.
* @param {Array.<string>} files An array of filenames.
* @return {Array.<Object>} Array of JSON objects.
*/
cvox.MathMap.parseFiles = function(files) {
var strs = cvox.MathMap.loadFiles(files);
return [].concat.apply([], strs.map(
// Note: As JSON.parse does not expect the value index as the second
// parameter, we wrap it.
function(value) { return JSON.parse(value); }));
};
/**
* Takes path to a JSON file and returns a JSON object.
* @param {string} path Contains the path to a JSON file.
* @return {string} JSON.
* @private
*/
cvox.MathMap.readJSON_ = function(path) {
var url = chrome.extension.getURL(path);
if (!url) {
throw 'Invalid path: ' + path;
}
var xhr = new XMLHttpRequest();
xhr.open('GET', url, false);
xhr.send();
return xhr.responseText;
};
|
