yomichan/ext/bg/js/translator.js
Alex Yatskov 1e9906c624 Automatically look up Kanji when cannot find definitions.
Allow text scanning without holding Shift key (resolves #18).
2016-10-08 17:39:21 -07:00

213 lines
6.7 KiB
JavaScript

/*
* Copyright (C) 2016 Alex Yatskov <alex@foosoft.net>
* Author: Alex Yatskov <alex@foosoft.net>
*
* 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 <http://www.gnu.org/licenses/>.
*/
class Translator {
constructor() {
this.loaded = false;
this.tagMeta = null;
this.dictionary = new Dictionary();
this.deinflector = new Deinflector();
}
loadData(callback) {
if (this.loaded) {
return Promise.resolve();
}
return loadJson('bg/data/rules.json').then(rules => {
this.deinflector.setRules(rules);
return loadJson('bg/data/tags.json');
}).then(tagMeta => {
this.tagMeta = tagMeta;
return this.dictionary.prepareDb();
}).then(exists => {
if (exists) {
return;
}
if (callback) {
callback({state: 'begin', progress: 0});
}
const banks = {};
const bankCallback = (loaded, total, indexUrl) => {
banks[indexUrl] = {loaded, total};
let percent = 0.0;
for (const url in banks) {
percent += banks[url].loaded / banks[url].total;
}
percent /= 3.0;
if (callback) {
callback({state: 'update', progress: Math.ceil(100.0 * percent)});
}
};
return Promise.all([
this.dictionary.importTermDict('bg/data/edict/index.json', bankCallback),
this.dictionary.importTermDict('bg/data/enamdict/index.json', bankCallback),
this.dictionary.importKanjiDict('bg/data/kanjidic/index.json', bankCallback),
]).then(() => {
return this.dictionary.sealDb();
}).then(() => {
if (callback) {
callback({state: 'end', progress: 100.0});
}
});
}).then(() => {
this.loaded = true;
});
}
findTermGroups(text) {
const deinflectGroups = {};
const deinflectPromises = [];
for (let i = text.length; i > 0; --i) {
deinflectPromises.push(
this.deinflector.deinflect(text.slice(0, i), term => {
return this.dictionary.findTerm(term).then(definitions => definitions.map(definition => definition.tags));
}).then(deinflects => {
const processPromises = [];
for (const deinflect of deinflects) {
processPromises.push(this.processTerm(
deinflectGroups,
deinflect.source,
deinflect.tags,
deinflect.rules,
deinflect.root
));
}
return Promise.all(processPromises);
})
);
}
return Promise.all(deinflectPromises).then(() => deinflectGroups);
}
findTerm(text) {
return this.findTermGroups(text).then(deinflectGroups => {
const definitions = [];
for (const key in deinflectGroups) {
definitions.push(deinflectGroups[key]);
}
let length = 0;
for (const result of definitions) {
length = Math.max(length, result.source.length);
}
return {
length,
definitions: sortTermDefs(definitions)
};
});
}
findKanji(text) {
const processed = {};
const promises = [];
for (const c of text) {
if (!processed[c]) {
promises.push(this.dictionary.findKanji(c).then((definitions) => definitions));
processed[c] = true;
}
}
return Promise.all(promises).then(sets => this.processKanji(sets.reduce((a, b) => a.concat(b), [])));
}
processTerm(groups, source, tags, rules, root) {
return this.dictionary.findTerm(root).then(definitions => {
for (const definition of definitions) {
if (definition.id in groups) {
continue;
}
let matched = tags.length === 0;
for (const tag of tags) {
if (definition.tags.includes(tag)) {
matched = true;
break;
}
}
if (!matched) {
continue;
}
const tagItems = [];
for (const tag of definition.tags) {
const tagItem = {
name: tag,
class: 'default',
order: Number.MAX_SAFE_INTEGER,
score: 0,
desc: definition.entities[tag] || '',
};
applyTagMeta(tagItem, this.tagMeta);
tagItems.push(tagItem);
}
let score = 0;
for (const tagItem of tagItems) {
score += tagItem.score;
}
groups[definition.id] = {
score,
source,
rules,
expression: definition.expression,
reading: definition.reading,
glossary: definition.glossary,
tags: sortTags(tagItems)
};
}
});
}
processKanji(definitions) {
for (const definition of definitions) {
const tagItems = [];
for (const tag of definition.tags) {
const tagItem = {
name: tag,
class: 'default',
order: Number.MAX_SAFE_INTEGER,
desc: '',
};
applyTagMeta(tagItem, this.tagMeta);
tagItems.push(tagItem);
}
definition.tags = sortTags(tagItems);
}
return definitions;
}
}