43 lines
2 KiB
JavaScript
43 lines
2 KiB
JavaScript
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/*---------------------------------------------------------------------------------------------
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* Copyright (c) Microsoft Corporation. All rights reserved.
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* Licensed under the MIT License. See License.txt in the project root for license information.
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*--------------------------------------------------------------------------------------------*/
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import { createScanner } from '../parser/htmlScanner';
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import { TokenType, DocumentHighlightKind } from '../htmlLanguageTypes';
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export function findDocumentHighlights(document, position, htmlDocument) {
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const offset = document.offsetAt(position);
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const node = htmlDocument.findNodeAt(offset);
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if (!node.tag) {
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return [];
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}
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const result = [];
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const startTagRange = getTagNameRange(TokenType.StartTag, document, node.start);
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const endTagRange = typeof node.endTagStart === 'number' && getTagNameRange(TokenType.EndTag, document, node.endTagStart);
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if (startTagRange && covers(startTagRange, position) || endTagRange && covers(endTagRange, position)) {
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if (startTagRange) {
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result.push({ kind: DocumentHighlightKind.Read, range: startTagRange });
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}
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if (endTagRange) {
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result.push({ kind: DocumentHighlightKind.Read, range: endTagRange });
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}
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}
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return result;
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}
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function isBeforeOrEqual(pos1, pos2) {
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return pos1.line < pos2.line || (pos1.line === pos2.line && pos1.character <= pos2.character);
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}
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function covers(range, position) {
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return isBeforeOrEqual(range.start, position) && isBeforeOrEqual(position, range.end);
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}
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function getTagNameRange(tokenType, document, startOffset) {
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const scanner = createScanner(document.getText(), startOffset);
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let token = scanner.scan();
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while (token !== TokenType.EOS && token !== tokenType) {
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token = scanner.scan();
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}
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if (token !== TokenType.EOS) {
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return { start: document.positionAt(scanner.getTokenOffset()), end: document.positionAt(scanner.getTokenEnd()) };
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}
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return null;
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}
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