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-rw-r--r--ext/fg/js/document.module.js177
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diff --git a/ext/fg/js/document.module.js b/ext/fg/js/document.module.js
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--- a/ext/fg/js/document.module.js
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-/*
- * Copyright (C) 2016-2017 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/>.
- */
-
-import {TextSourceRange, TextSourceElement} from './source.module.js';
-
-export function docOffsetCalc(element) {
- const scrollTop = window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop;
- const scrollLeft = window.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft;
-
- const clientTop = document.documentElement.clientTop || document.body.clientTop || 0;
- const clientLeft = document.documentElement.clientLeft || document.body.clientLeft || 0;
-
- const rect = element.getBoundingClientRect();
- const top = Math.round(rect.top + scrollTop - clientTop);
- const left = Math.round(rect.left + scrollLeft - clientLeft);
-
- return {top, left};
-}
-
-export function docImposterCreate(element) {
- const styleProps = window.getComputedStyle(element);
- const stylePairs = [];
- for (const key of styleProps) {
- stylePairs.push(`${key}: ${styleProps[key]};`);
- }
-
- const offset = docOffsetCalc(element);
- const imposter = document.createElement('div');
- imposter.className = 'yomichan-imposter';
- imposter.innerText = element.value;
- imposter.style.cssText = stylePairs.join('\n');
- imposter.style.position = 'absolute';
- imposter.style.top = `${offset.top}px`;
- imposter.style.left = `${offset.left}px`;
- imposter.style.opacity = 0;
- imposter.style.zIndex = 2147483646;
- if (element.nodeName === 'TEXTAREA' && styleProps.overflow === 'visible') {
- imposter.style.overflow = 'auto';
- }
-
- document.body.appendChild(imposter);
- imposter.scrollTop = element.scrollTop;
- imposter.scrollLeft = element.scrollLeft;
-
- return imposter;
-}
-
-export function docImposterDestroy() {
- for (const element of document.getElementsByClassName('yomichan-imposter')) {
- element.parentNode.removeChild(element);
- }
-}
-
-export function docRangeFromPoint(point) {
- const element = document.elementFromPoint(point.x, point.y);
- let imposter = null;
- if (element) {
- if (element.nodeName === 'IMG' || element.nodeName === 'BUTTON') {
- return new TextSourceElement(element);
- } else if (element.nodeName === 'INPUT' || element.nodeName === 'TEXTAREA') {
- imposter = docImposterCreate(element);
- }
- }
-
- if (!document.caretRangeFromPoint) {
- document.caretRangeFromPoint = (x, y) => {
- const position = document.caretPositionFromPoint(x,y);
- if (position && position.offsetNode && position.offsetNode.nodeType === Node.TEXT_NODE) {
- const range = document.createRange();
- range.setStart(position.offsetNode, position.offset);
- range.setEnd(position.offsetNode, position.offset);
- return range;
- }
- return null;
- };
- }
-
- const range = document.caretRangeFromPoint(point.x, point.y);
- if (range === null) {
- return;
- }
-
- if(imposter !== null) imposter.style.zIndex = -2147483646;
-
- const rects = range.getClientRects();
- for (const rect of rects) {
- if (point.y <= rect.bottom + 2) {
- return new TextSourceRange(range);
- }
- }
-}
-
-export function docSentenceExtract(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 (c === '\n') {
- startPos = i + 1;
- break;
- }
-
- 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 (c === '\n') {
- endPos = i + 1;
- break;
- }
-
- 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);
- }
- }
-
- const text = content.substring(startPos, endPos);
- const padding = text.length - text.replace(/^\s+/, '').length;
-
- return {
- text: text.trim(),
- offset: position - startPos - padding
- };
-}