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
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
|
/*
* Copyright (C) 2024 Yomitan Authors
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
import {log} from '../core/log.js';
export class LanguageTransformer {
constructor() {
/** @type {number} */
this._nextFlagIndex = 0;
/** @type {import('language-transformer-internal').Transform[]} */
this._transforms = [];
/** @type {Map<string, number>} */
this._conditionTypeToConditionFlagsMap = new Map();
/** @type {Map<string, number>} */
this._partOfSpeechToConditionFlagsMap = new Map();
}
/** */
clear() {
this._nextFlagIndex = 0;
this._transforms = [];
this._conditionTypeToConditionFlagsMap.clear();
this._partOfSpeechToConditionFlagsMap.clear();
}
/**
* Note: this function does not currently combine properly with previous descriptors,
* they are treated as completely separate collections. This should eventually be changed.
* @param {import('language-transformer').LanguageTransformDescriptor} descriptor
* @throws {Error}
*/
addDescriptor(descriptor) {
const {conditions, transforms} = descriptor;
const conditionEntries = Object.entries(conditions);
const {conditionFlagsMap, nextFlagIndex} = this._getConditionFlagsMap(conditionEntries, this._nextFlagIndex);
/** @type {import('language-transformer-internal').Transform[]} */
const transforms2 = [];
for (let i = 0, ii = transforms.length; i < ii; ++i) {
const {name, rules} = transforms[i];
/** @type {import('language-transformer-internal').Rule[]} */
const rules2 = [];
for (let j = 0, jj = rules.length; j < jj; ++j) {
const {type, isInflected, deinflect, conditionsIn, conditionsOut} = rules[j];
const conditionFlagsIn = this._getConditionFlagsStrict(conditionFlagsMap, conditionsIn);
if (conditionFlagsIn === null) { throw new Error(`Invalid conditionsIn for transform[${i}].rules[${j}]`); }
const conditionFlagsOut = this._getConditionFlagsStrict(conditionFlagsMap, conditionsOut);
if (conditionFlagsOut === null) { throw new Error(`Invalid conditionsOut for transform[${i}].rules[${j}]`); }
rules2.push({
type,
isInflected,
deinflect,
conditionsIn: conditionFlagsIn,
conditionsOut: conditionFlagsOut
});
}
const isInflectedTests = rules.map((rule) => rule.isInflected);
const heuristic = new RegExp(isInflectedTests.map((regExp) => regExp.source).join('|'));
transforms2.push({name, rules: rules2, heuristic});
}
this._nextFlagIndex = nextFlagIndex;
for (const transform of transforms2) {
this._transforms.push(transform);
}
for (const [type, {isDictionaryForm}] of conditionEntries) {
const flags = conditionFlagsMap.get(type);
if (typeof flags === 'undefined') { continue; } // This case should never happen
this._conditionTypeToConditionFlagsMap.set(type, flags);
if (isDictionaryForm) {
this._partOfSpeechToConditionFlagsMap.set(type, flags);
}
}
}
/**
* @param {string[]} partsOfSpeech
* @returns {number}
*/
getConditionFlagsFromPartsOfSpeech(partsOfSpeech) {
return this._getConditionFlags(this._partOfSpeechToConditionFlagsMap, partsOfSpeech);
}
/**
* @param {string[]} conditionTypes
* @returns {number}
*/
getConditionFlagsFromConditionTypes(conditionTypes) {
return this._getConditionFlags(this._conditionTypeToConditionFlagsMap, conditionTypes);
}
/**
* @param {string} conditionType
* @returns {number}
*/
getConditionFlagsFromConditionType(conditionType) {
return this._getConditionFlags(this._conditionTypeToConditionFlagsMap, [conditionType]);
}
/**
* @param {string} sourceText
* @returns {import('language-transformer-internal').TransformedText[]}
*/
transform(sourceText) {
const results = [LanguageTransformer.createTransformedText(sourceText, 0, [])];
for (let i = 0; i < results.length; ++i) {
const {text, conditions, trace} = results[i];
for (const transform of this._transforms) {
if (!transform.heuristic.test(text)) { continue; }
const {name, rules} = transform;
for (let j = 0, jj = rules.length; j < jj; ++j) {
const rule = rules[j];
if (!LanguageTransformer.conditionsMatch(conditions, rule.conditionsIn)) { continue; }
const {isInflected, deinflect} = rule;
if (!isInflected.test(text)) { continue; }
const isCycle = trace.some((frame) => frame.transform === name && frame.ruleIndex === j && frame.text === text);
if (isCycle) {
log.warn(new Error(`Cycle detected in transform[${name}] rule[${j}] for text: ${text}`));
continue;
}
results.push(LanguageTransformer.createTransformedText(
deinflect(text),
rule.conditionsOut,
this._extendTrace(trace, {transform: name, ruleIndex: j, text})
));
}
}
}
return results;
}
/**
* @param {string} text
* @param {number} conditions
* @param {import('language-transformer-internal').Trace} trace
* @returns {import('language-transformer-internal').TransformedText}
*/
static createTransformedText(text, conditions, trace) {
return {text, conditions, trace};
}
/**
* If `currentConditions` is `0`, then `nextConditions` is ignored and `true` is returned.
* Otherwise, there must be at least one shared condition between `currentConditions` and `nextConditions`.
* @param {number} currentConditions
* @param {number} nextConditions
* @returns {boolean}
*/
static conditionsMatch(currentConditions, nextConditions) {
return currentConditions === 0 || (currentConditions & nextConditions) !== 0;
}
/**
* @param {import('language-transformer').ConditionMapEntries} conditions
* @param {number} nextFlagIndex
* @returns {{conditionFlagsMap: Map<string, number>, nextFlagIndex: number}}
* @throws {Error}
*/
_getConditionFlagsMap(conditions, nextFlagIndex) {
/** @type {Map<string, number>} */
const conditionFlagsMap = new Map();
/** @type {import('language-transformer').ConditionMapEntries} */
let targets = conditions;
while (targets.length > 0) {
const nextTargets = [];
for (const target of targets) {
const [type, condition] = target;
const {subConditions} = condition;
let flags = 0;
if (typeof subConditions === 'undefined') {
if (nextFlagIndex >= 32) {
// Flags greater than or equal to 32 don't work because JavaScript only supports up to 32-bit integer operations
throw new Error('Maximum number of conditions was exceeded');
}
flags = 1 << nextFlagIndex;
++nextFlagIndex;
} else {
const multiFlags = this._getConditionFlagsStrict(conditionFlagsMap, subConditions);
if (multiFlags === null) {
nextTargets.push(target);
continue;
} else {
flags = multiFlags;
}
}
conditionFlagsMap.set(type, flags);
}
if (nextTargets.length === targets.length) {
// Cycle in subRule declaration
throw new Error('Maximum number of conditions was exceeded');
}
targets = nextTargets;
}
return {conditionFlagsMap, nextFlagIndex};
}
/**
* @param {Map<string, number>} conditionFlagsMap
* @param {string[]} conditionTypes
* @returns {?number}
*/
_getConditionFlagsStrict(conditionFlagsMap, conditionTypes) {
let flags = 0;
for (const conditionType of conditionTypes) {
const flags2 = conditionFlagsMap.get(conditionType);
if (typeof flags2 === 'undefined') {
return null;
}
flags |= flags2;
}
return flags;
}
/**
* @param {Map<string, number>} conditionFlagsMap
* @param {string[]} conditionTypes
* @returns {number}
*/
_getConditionFlags(conditionFlagsMap, conditionTypes) {
let flags = 0;
for (const conditionType of conditionTypes) {
let flags2 = conditionFlagsMap.get(conditionType);
if (typeof flags2 === 'undefined') {
flags2 = 0;
}
flags |= flags2;
}
return flags;
}
/**
* @param {import('language-transformer-internal').Trace} trace
* @param {import('language-transformer-internal').TraceFrame} newFrame
* @returns {import('language-transformer-internal').Trace}
*/
_extendTrace(trace, newFrame) {
const newTrace = [newFrame];
for (const {transform, ruleIndex, text} of trace) {
newTrace.push({transform, ruleIndex, text});
}
return newTrace;
}
}
|