265 lines
11 KiB
JavaScript
265 lines
11 KiB
JavaScript
/*---------------------------------------------------------------------------------------------
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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, Range, Position, MarkupKind } from '../htmlLanguageTypes';
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import { isDefined } from '../utils/object';
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import { generateDocumentation } from '../languageFacts/dataProvider';
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import { entities } from '../parser/htmlEntities';
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import { isLetterOrDigit } from '../utils/strings';
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import * as l10n from '@vscode/l10n';
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export class HTMLHover {
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constructor(lsOptions, dataManager) {
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this.lsOptions = lsOptions;
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this.dataManager = dataManager;
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}
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doHover(document, position, htmlDocument, options) {
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const convertContents = this.convertContents.bind(this);
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const doesSupportMarkdown = this.doesSupportMarkdown();
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const offset = document.offsetAt(position);
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const node = htmlDocument.findNodeAt(offset);
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const text = document.getText();
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if (!node || !node.tag) {
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return null;
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}
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const dataProviders = this.dataManager.getDataProviders().filter(p => p.isApplicable(document.languageId));
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function getTagHover(currTag, range, open) {
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for (const provider of dataProviders) {
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let hover = null;
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provider.provideTags().forEach(tag => {
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if (tag.name.toLowerCase() === currTag.toLowerCase()) {
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let markupContent = generateDocumentation(tag, options, doesSupportMarkdown);
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if (!markupContent) {
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markupContent = {
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kind: doesSupportMarkdown ? 'markdown' : 'plaintext',
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value: ''
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};
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}
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hover = { contents: markupContent, range };
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}
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});
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if (hover) {
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hover.contents = convertContents(hover.contents);
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return hover;
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}
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}
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return null;
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}
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function getAttrHover(currTag, currAttr, range) {
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for (const provider of dataProviders) {
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let hover = null;
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provider.provideAttributes(currTag).forEach(attr => {
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if (currAttr === attr.name && attr.description) {
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const contentsDoc = generateDocumentation(attr, options, doesSupportMarkdown);
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if (contentsDoc) {
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hover = { contents: contentsDoc, range };
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}
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else {
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hover = null;
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}
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}
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});
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if (hover) {
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hover.contents = convertContents(hover.contents);
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return hover;
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}
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}
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return null;
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}
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function getAttrValueHover(currTag, currAttr, currAttrValue, range) {
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for (const provider of dataProviders) {
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let hover = null;
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provider.provideValues(currTag, currAttr).forEach(attrValue => {
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if (currAttrValue === attrValue.name && attrValue.description) {
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const contentsDoc = generateDocumentation(attrValue, options, doesSupportMarkdown);
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if (contentsDoc) {
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hover = { contents: contentsDoc, range };
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}
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else {
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hover = null;
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}
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}
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});
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if (hover) {
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hover.contents = convertContents(hover.contents);
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return hover;
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}
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}
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return null;
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}
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function getEntityHover(text, range) {
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let currEntity = filterEntity(text);
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for (const entity in entities) {
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let hover = null;
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const label = '&' + entity;
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if (currEntity === label) {
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let code = entities[entity].charCodeAt(0).toString(16).toUpperCase();
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let hex = 'U+';
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if (code.length < 4) {
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const zeroes = 4 - code.length;
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let k = 0;
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while (k < zeroes) {
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hex += '0';
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k += 1;
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}
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}
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hex += code;
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const contentsDoc = l10n.t('Character entity representing \'{0}\', unicode equivalent \'{1}\'', entities[entity], hex);
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if (contentsDoc) {
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hover = { contents: contentsDoc, range };
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}
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else {
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hover = null;
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}
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}
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if (hover) {
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hover.contents = convertContents(hover.contents);
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return hover;
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}
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}
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return null;
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}
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function getTagNameRange(tokenType, 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 && (scanner.getTokenEnd() < offset || scanner.getTokenEnd() === offset && token !== tokenType)) {
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token = scanner.scan();
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}
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if (token === tokenType && offset <= scanner.getTokenEnd()) {
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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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function getEntityRange() {
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let k = offset - 1;
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let characterStart = position.character;
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while (k >= 0 && isLetterOrDigit(text, k)) {
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k--;
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characterStart--;
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}
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let n = k + 1;
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let characterEnd = characterStart;
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while (isLetterOrDigit(text, n)) {
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n++;
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characterEnd++;
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}
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if (k >= 0 && text[k] === '&') {
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let range = null;
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if (text[n] === ';') {
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range = Range.create(Position.create(position.line, characterStart), Position.create(position.line, characterEnd + 1));
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}
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else {
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range = Range.create(Position.create(position.line, characterStart), Position.create(position.line, characterEnd));
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}
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return range;
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}
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return null;
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}
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function filterEntity(text) {
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let k = offset - 1;
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let newText = '&';
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while (k >= 0 && isLetterOrDigit(text, k)) {
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k--;
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}
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k = k + 1;
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while (isLetterOrDigit(text, k)) {
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newText += text[k];
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k += 1;
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}
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newText += ';';
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return newText;
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}
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if (node.endTagStart && offset >= node.endTagStart) {
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const tagRange = getTagNameRange(TokenType.EndTag, node.endTagStart);
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if (tagRange) {
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return getTagHover(node.tag, tagRange, false);
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}
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return null;
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}
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const tagRange = getTagNameRange(TokenType.StartTag, node.start);
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if (tagRange) {
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return getTagHover(node.tag, tagRange, true);
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}
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const attrRange = getTagNameRange(TokenType.AttributeName, node.start);
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if (attrRange) {
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const tag = node.tag;
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const attr = document.getText(attrRange);
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return getAttrHover(tag, attr, attrRange);
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}
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const entityRange = getEntityRange();
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if (entityRange) {
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return getEntityHover(text, entityRange);
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}
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function scanAttrAndAttrValue(nodeStart, attrValueStart) {
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const scanner = createScanner(document.getText(), nodeStart);
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let token = scanner.scan();
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let prevAttr = undefined;
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while (token !== TokenType.EOS && (scanner.getTokenEnd() <= attrValueStart)) {
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token = scanner.scan();
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if (token === TokenType.AttributeName) {
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prevAttr = scanner.getTokenText();
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}
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}
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return prevAttr;
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}
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const attrValueRange = getTagNameRange(TokenType.AttributeValue, node.start);
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if (attrValueRange) {
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const tag = node.tag;
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const attrValue = trimQuotes(document.getText(attrValueRange));
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const matchAttr = scanAttrAndAttrValue(node.start, document.offsetAt(attrValueRange.start));
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if (matchAttr) {
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return getAttrValueHover(tag, matchAttr, attrValue, attrValueRange);
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}
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}
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return null;
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}
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convertContents(contents) {
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if (!this.doesSupportMarkdown()) {
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if (typeof contents === 'string') {
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return contents;
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}
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// MarkupContent
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else if ('kind' in contents) {
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return {
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kind: 'plaintext',
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value: contents.value
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};
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}
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// MarkedString[]
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else if (Array.isArray(contents)) {
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contents.map(c => {
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return typeof c === 'string' ? c : c.value;
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});
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}
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// MarkedString
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else {
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return contents.value;
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}
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}
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return contents;
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}
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doesSupportMarkdown() {
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if (!isDefined(this.supportsMarkdown)) {
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if (!isDefined(this.lsOptions.clientCapabilities)) {
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this.supportsMarkdown = true;
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return this.supportsMarkdown;
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}
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const contentFormat = this.lsOptions.clientCapabilities?.textDocument?.hover?.contentFormat;
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this.supportsMarkdown = Array.isArray(contentFormat) && contentFormat.indexOf(MarkupKind.Markdown) !== -1;
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}
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return this.supportsMarkdown;
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}
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}
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function trimQuotes(s) {
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if (s.length <= 1) {
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return s.replace(/['"]/, '');
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}
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if (s[0] === `'` || s[0] === `"`) {
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s = s.slice(1);
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}
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if (s[s.length - 1] === `'` || s[s.length - 1] === `"`) {
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s = s.slice(0, -1);
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}
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return s;
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}
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