yomichan/ext/fg/js/util.js
2016-10-26 20:30:44 -07:00

131 lines
3.6 KiB
JavaScript
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/*
* 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/>.
*/
function invokeApiBg(action, params) {
return new Promise((resolve, reject) => {
chrome.runtime.sendMessage({action, params}, ({result, error}) => {
if (error) {
reject(error);
} else {
resolve(result);
}
});
});
}
function getEnabled() {
return invokeApiBg('getEnabled', {});
}
function getOptions() {
return invokeApiBg('getOptions', {});
}
function findTerm(text) {
return invokeApiBg('findTerm', {text});
}
function findKanji(text) {
return invokeApiBg('findKanji', {text});
}
function renderText(data, template) {
return invokeApiBg('renderText', {data, template});
}
function canAddDefinitions(definitions, modes) {
return invokeApiBg('canAddDefinitions', {definitions, modes}).catch(() => null);
}
function addDefinition(definition, mode) {
return invokeApiBg('addDefinition', {definition, mode});
}
function textSourceFromPoint(point) {
const element = document.elementFromPoint(point.x, point.y);
if (element !== null) {
const names = ['IMG', 'INPUT', 'BUTTON', 'TEXTAREA'];
if (names.includes(element.nodeName)) {
return new TextSourceElement(element);
}
}
const range = document.caretRangeFromPoint(point.x, point.y);
if (range !== null) {
return new TextSourceRange(range);
}
return null;
}
function extractSentence(source, extent) {
const quotesFwd = {'「': '」', '『': '』', "'": "'", '"': '"'};
const quotesBwd = {'」': '「', '』': '『', "'": "'", '"': '"'};
const terminators = '…。..?!';
const sourceLocal = source.clone();
const position = sourceLocal.setStartOffset(extent);
sourceLocal.setEndOffset(position + extent);
const content = sourceLocal.text();
let quoteStack = [];
let startPos = 0;
for (let i = position; i >= startPos; --i) {
const c = content[i];
if (quoteStack.length === 0 && (terminators.includes(c) || c in quotesFwd)) {
startPos = i + 1;
break;
}
if (quoteStack.length > 0 && c === quoteStack[0]) {
quoteStack.pop();
} else if (c in quotesBwd) {
quoteStack = [quotesBwd[c]].concat(quoteStack);
}
}
quoteStack = [];
let endPos = content.length;
for (let i = position; i < endPos; ++i) {
const c = content[i];
if (quoteStack.length === 0) {
if (terminators.includes(c)) {
endPos = i + 1;
break;
}
else if (c in quotesBwd) {
endPos = i;
break;
}
}
if (quoteStack.length > 0 && c === quoteStack[0]) {
quoteStack.pop();
} else if (c in quotesFwd) {
quoteStack = [quotesFwd[c]].concat(quoteStack);
}
}
return content.substring(startPos, endPos).trim();
}