/* * Copyright (C) 2016-2020 Yomichan Authors * * 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 <https://www.gnu.org/licenses/>. */ /* global * DOMTextScanner * DocumentUtil */ class TextSourceRange { constructor(range, content, imposterContainer, imposterSourceElement) { this._range = range; this._rangeStartOffset = range.startOffset; this._content = content; this._imposterContainer = imposterContainer; this._imposterSourceElement = imposterSourceElement; } get range() { return this._range; } get rangeStartOffset() { return this._rangeStartOffset; } get imposterSourceElement() { return this._imposterSourceElement; } clone() { return new TextSourceRange(this._range.cloneRange(), this._content, this._imposterContainer, this._imposterSourceElement); } cleanup() { if (this._imposterContainer !== null && this._imposterContainer.parentNode !== null) { this._imposterContainer.parentNode.removeChild(this._imposterContainer); } } text() { return this._content; } setEndOffset(length, layoutAwareScan, fromEnd=false) { const state = ( fromEnd ? new DOMTextScanner(this._range.endContainer, this._range.endOffset, !layoutAwareScan, layoutAwareScan).seek(length) : new DOMTextScanner(this._range.startContainer, this._range.startOffset, !layoutAwareScan, layoutAwareScan).seek(length) ); this._range.setEnd(state.node, state.offset); this._content = (fromEnd ? this._content + state.content : state.content); return length - state.remainder; } setStartOffset(length, layoutAwareScan) { const state = new DOMTextScanner(this._range.startContainer, this._range.startOffset, !layoutAwareScan, layoutAwareScan).seek(-length); this._range.setStart(state.node, state.offset); this._rangeStartOffset = this._range.startOffset; this._content = state.content + this._content; return length - state.remainder; } getRect() { return this._range.getBoundingClientRect(); } getWritingMode() { return TextSourceRange.getElementWritingMode(TextSourceRange.getParentElement(this._range.startContainer)); } select() { const selection = window.getSelection(); selection.removeAllRanges(); selection.addRange(this._range); } deselect() { const selection = window.getSelection(); selection.removeAllRanges(); } hasSameStart(other) { if (!( typeof other === 'object' && other !== null && other instanceof TextSourceRange )) { return false; } if (this._imposterSourceElement !== null) { return ( this._imposterSourceElement === other.imposterSourceElement && this._rangeStartOffset === other.rangeStartOffset ); } else { try { return this._range.compareBoundaryPoints(Range.START_TO_START, other.range) === 0; } catch (e) { if (e.name === 'WrongDocumentError') { // This can happen with shadow DOMs if the ranges are in different documents. return false; } throw e; } } } getNodesInRange() { return DocumentUtil.getNodesInRange(this._range); } static getParentElement(node) { while (node !== null && node.nodeType !== Node.ELEMENT_NODE) { node = node.parentNode; } return node; } static getElementWritingMode(element) { if (element !== null) { const style = window.getComputedStyle(element); const writingMode = style.writingMode; if (typeof writingMode === 'string') { return TextSourceRange.normalizeWritingMode(writingMode); } } return 'horizontal-tb'; } static normalizeWritingMode(writingMode) { switch (writingMode) { case 'lr': case 'lr-tb': case 'rl': return 'horizontal-tb'; case 'tb': return 'vertical-lr'; case 'tb-rl': return 'vertical-rl'; default: return writingMode; } } }