On many sites, for example Twitter (posts), Yomichan doesn't match any text from the beginning of the line unless you move the mouse cursor to the top left corner of the word that starts from the beginning of the line. Apparently there were some problems related to the imposter and there was commit0cc5566
adding a fix for it, but this seemed to cause problems and542cdb2
was added to fix that. It didn't handle all of the cases, though, so this commit is letting everything through on Firefox.
181 lines
5.7 KiB
JavaScript
181 lines
5.7 KiB
JavaScript
/*
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* Copyright (C) 2016-2017 Alex Yatskov <alex@foosoft.net>
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* Author: Alex Yatskov <alex@foosoft.net>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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function docOffsetCalc(element) {
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const scrollTop = window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop;
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const scrollLeft = window.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft;
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const clientTop = document.documentElement.clientTop || document.body.clientTop || 0;
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const clientLeft = document.documentElement.clientLeft || document.body.clientLeft || 0;
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const rect = element.getBoundingClientRect();
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const top = Math.round(rect.top + scrollTop - clientTop);
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const left = Math.round(rect.left + scrollLeft - clientLeft);
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return {top, left};
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}
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function docImposterCreate(element) {
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const styleProps = window.getComputedStyle(element);
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const stylePairs = [];
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for (const key of styleProps) {
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stylePairs.push(`${key}: ${styleProps[key]};`);
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}
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const offset = docOffsetCalc(element);
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const imposter = document.createElement('div');
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imposter.className = 'yomichan-imposter';
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imposter.innerText = element.value;
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imposter.style.cssText = stylePairs.join('\n');
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imposter.style.position = 'absolute';
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imposter.style.top = `${offset.top}px`;
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imposter.style.left = `${offset.left}px`;
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imposter.style.opacity = 0;
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imposter.style.zIndex = 2147483646;
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if (element.nodeName === 'TEXTAREA' && styleProps.overflow === 'visible') {
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imposter.style.overflow = 'auto';
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}
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document.body.appendChild(imposter);
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imposter.scrollTop = element.scrollTop;
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imposter.scrollLeft = element.scrollLeft;
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return imposter;
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}
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function docImposterDestroy() {
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for (const element of document.getElementsByClassName('yomichan-imposter')) {
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element.parentNode.removeChild(element);
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}
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}
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function docRangeFromPoint(point) {
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const element = document.elementFromPoint(point.x, point.y);
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let imposter = null;
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if (element) {
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if (element.nodeName === 'IMG' || element.nodeName === 'BUTTON') {
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return new TextSourceElement(element);
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} else if (element.nodeName === 'INPUT' || element.nodeName === 'TEXTAREA') {
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imposter = docImposterCreate(element);
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}
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}
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if (!document.caretRangeFromPoint) {
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document.caretRangeFromPoint = (x, y) => {
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const position = document.caretPositionFromPoint(x,y);
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if (position && position.offsetNode && position.offsetNode.nodeType === Node.TEXT_NODE) {
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const range = document.createRange();
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range.setStart(position.offsetNode, position.offset);
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range.setEnd(position.offsetNode, position.offset);
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return range;
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}
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return null;
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};
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}
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const range = document.caretRangeFromPoint(point.x, point.y);
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if (range === null) {
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return;
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}
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if(imposter !== null) imposter.style.zIndex = -2147483646;
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const rects = range.getClientRects();
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for (const rect of rects) {
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if (point.y <= rect.bottom + 2) {
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return new TextSourceRange(range);
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}
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}
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if (navigator.userAgent.match(/Firefox/)) {
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return new TextSourceRange(range);
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}
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}
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function docSentenceExtract(source, extent) {
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const quotesFwd = {'「': '」', '『': '』', "'": "'", '"': '"'};
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const quotesBwd = {'」': '「', '』': '『', "'": "'", '"': '"'};
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const terminators = '…。..??!!';
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const sourceLocal = source.clone();
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const position = sourceLocal.setStartOffset(extent);
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sourceLocal.setEndOffset(position + extent);
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const content = sourceLocal.text();
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let quoteStack = [];
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let startPos = 0;
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for (let i = position; i >= startPos; --i) {
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const c = content[i];
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if (c === '\n') {
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startPos = i + 1;
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break;
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}
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if (quoteStack.length === 0 && (terminators.includes(c) || c in quotesFwd)) {
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startPos = i + 1;
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break;
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}
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if (quoteStack.length > 0 && c === quoteStack[0]) {
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quoteStack.pop();
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} else if (c in quotesBwd) {
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quoteStack = [quotesBwd[c]].concat(quoteStack);
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}
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}
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quoteStack = [];
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let endPos = content.length;
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for (let i = position; i <= endPos; ++i) {
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const c = content[i];
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if (c === '\n') {
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endPos = i + 1;
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break;
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}
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if (quoteStack.length === 0) {
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if (terminators.includes(c)) {
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endPos = i + 1;
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break;
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}
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else if (c in quotesBwd) {
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endPos = i;
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break;
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}
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}
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if (quoteStack.length > 0 && c === quoteStack[0]) {
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quoteStack.pop();
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} else if (c in quotesFwd) {
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quoteStack = [quotesFwd[c]].concat(quoteStack);
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}
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}
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const text = content.substring(startPos, endPos);
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const padding = text.length - text.replace(/^\s+/, '').length;
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return {
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text: text.trim(),
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offset: position - startPos - padding
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};
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}
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