/* * 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/>. */ 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}; } 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; } function docImposterDestroy() { for (const element of document.getElementsByClassName('yomichan-imposter')) { element.parentNode.removeChild(element); } } function docRangeFromPoint(point) { const element = document.elementFromPoint(point.x, point.y); if (element) { if (element.nodeName === 'IMG' || element.nodeName === 'BUTTON') { return new TextSourceElement(element); } else if (element.nodeName === 'INPUT' || element.nodeName === 'TEXTAREA') { docImposterCreate(element); } } if (!document.caretRangeFromPoint) { document.caretRangeFromPoint = (x, y) => { const position = document.caretPositionFromPoint(x,y); if (position && position.offsetNode) { const range = document.createRange(); range.setStart(position.offsetNode, position.offset); range.setEnd(position.offsetNode, position.offset); return range; } }; } const range = document.caretRangeFromPoint(point.x, point.y); if (range && range.startContainer.nodeType === 3 && range.endContainer.nodeType === 3) { return new TextSourceRange(range); } } 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 }; }