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/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
import * as vscode from 'vscode';
import { Node, Stylesheet } from 'EmmetFlatNode';
import { isValidLocationForEmmetAbbreviation, getSyntaxFromArgs } from './abbreviationActions';
import { getEmmetHelper, getMappingForIncludedLanguages, parsePartialStylesheet, getEmmetConfiguration, getEmmetMode, isStyleSheet, getFlatNode, allowedMimeTypesInScriptTag, toLSTextDocument, getHtmlFlatNode, getEmbeddedCssNodeIfAny } from './util';
import { Range as LSRange } from 'vscode-languageserver-textdocument';
import { getRootNode } from './parseDocument';
export class DefaultCompletionItemProvider implements vscode.CompletionItemProvider {
private lastCompletionType: string | undefined;
public provideCompletionItems(document: vscode.TextDocument, position: vscode.Position, _: vscode.CancellationToken, context: vscode.CompletionContext): Thenable<vscode.CompletionList | undefined> | undefined {
const completionResult = this.provideCompletionItemsInternal(document, position, context);
if (!completionResult) {
this.lastCompletionType = undefined;
return;
}
return completionResult.then(completionList => {
if (!completionList || !completionList.items.length) {
this.lastCompletionType = undefined;
return completionList;
}
const item = completionList.items[0];
const expandedText = item.documentation ? item.documentation.toString() : '';
if (expandedText.startsWith('<')) {
this.lastCompletionType = 'html';
} else if (expandedText.indexOf(':') > 0 && expandedText.endsWith(';')) {
this.lastCompletionType = 'css';
} else {
this.lastCompletionType = undefined;
}
return completionList;
});
}
private provideCompletionItemsInternal(document: vscode.TextDocument, position: vscode.Position, context: vscode.CompletionContext): Thenable<vscode.CompletionList | undefined> | undefined {
const emmetConfig = vscode.workspace.getConfiguration('emmet');
const excludedLanguages = emmetConfig['excludeLanguages'] ? emmetConfig['excludeLanguages'] : [];
if (excludedLanguages.indexOf(document.languageId) > -1) {
return;
}
const mappedLanguages = getMappingForIncludedLanguages();
const isSyntaxMapped = mappedLanguages[document.languageId] ? true : false;
let emmetMode = getEmmetMode((isSyntaxMapped ? mappedLanguages[document.languageId] : document.languageId), mappedLanguages, excludedLanguages);
if (!emmetMode
|| emmetConfig['showExpandedAbbreviation'] === 'never'
|| ((isSyntaxMapped || emmetMode === 'jsx') && emmetConfig['showExpandedAbbreviation'] !== 'always')) {
return;
}
let syntax = emmetMode;
let validateLocation = syntax === 'html' || syntax === 'jsx' || syntax === 'xml';
let rootNode: Node | undefined;
let currentNode: Node | undefined;
const lsDoc = toLSTextDocument(document);
position = document.validatePosition(position);
// Don't show completions if there's a comment at the beginning of the line
const lineRange = new vscode.Range(position.line, 0, position.line, position.character);
if (document.getText(lineRange).trimStart().startsWith('//')) {
return;
}
const helper = getEmmetHelper();
if (syntax === 'html') {
if (context.triggerKind === vscode.CompletionTriggerKind.TriggerForIncompleteCompletions) {
switch (this.lastCompletionType) {
case 'html':
validateLocation = false;
break;
case 'css':
validateLocation = false;
syntax = 'css';
break;
default:
break;
}
}
if (validateLocation) {
const positionOffset = document.offsetAt(position);
const emmetRootNode = getRootNode(document, true);
const foundNode = getHtmlFlatNode(document.getText(), emmetRootNode, positionOffset, false);
if (foundNode) {
if (foundNode.name === 'script') {
const typeNode = foundNode.attributes.find(attr => attr.name.toString() === 'type');
if (typeNode) {
const typeAttrValue = typeNode.value.toString();
if (typeAttrValue === 'application/javascript' || typeAttrValue === 'text/javascript') {
if (!getSyntaxFromArgs({ language: 'javascript' })) {
return;
} else {
validateLocation = false;
}
}
else if (allowedMimeTypesInScriptTag.includes(typeAttrValue)) {
validateLocation = false;
}
} else {
return;
}
}
else if (foundNode.name === 'style') {
syntax = 'css';
validateLocation = false;
} else {
const styleNode = foundNode.attributes.find(attr => attr.name.toString() === 'style');
if (styleNode && styleNode.value.start <= positionOffset && positionOffset <= styleNode.value.end) {
syntax = 'css';
validateLocation = false;
}
}
}
}
}
const expandOptions = isStyleSheet(syntax) ?
{ lookAhead: false, syntax: 'stylesheet' } :
{ lookAhead: true, syntax: 'markup' };
const extractAbbreviationResults = helper.extractAbbreviation(lsDoc, position, expandOptions);
if (!extractAbbreviationResults || !helper.isAbbreviationValid(syntax, extractAbbreviationResults.abbreviation)) {
return;
}
const offset = document.offsetAt(position);
if (isStyleSheet(document.languageId) && context.triggerKind !== vscode.CompletionTriggerKind.TriggerForIncompleteCompletions) {
validateLocation = true;
let usePartialParsing = vscode.workspace.getConfiguration('emmet')['optimizeStylesheetParsing'] === true;
rootNode = usePartialParsing && document.lineCount > 1000 ? parsePartialStylesheet(document, position) : <Stylesheet>getRootNode(document, true);
if (!rootNode) {
return;
}
currentNode = getFlatNode(rootNode, offset, true);
}
// Fix for https://github.com/microsoft/vscode/issues/107578
// Validate location if syntax is of styleSheet type to ensure that location is valid for emmet abbreviation.
// For an html document containing a <style> node, compute the embeddedCssNode and fetch the flattened node as currentNode.
if (!isStyleSheet(document.languageId) && isStyleSheet(syntax) && context.triggerKind !== vscode.CompletionTriggerKind.TriggerForIncompleteCompletions) {
validateLocation = true;
rootNode = getRootNode(document, true);
if (!rootNode) {
return;
}
let flatNode = getFlatNode(rootNode, offset, true);
let embeddedCssNode = getEmbeddedCssNodeIfAny(document, flatNode, position);
currentNode = getFlatNode(embeddedCssNode, offset, true);
}
if (validateLocation && !isValidLocationForEmmetAbbreviation(document, rootNode, currentNode, syntax, offset, toRange(extractAbbreviationResults.abbreviationRange))) {
return;
}
let isNoisePromise: Thenable<boolean> = Promise.resolve(false);
// Fix for https://github.com/microsoft/vscode/issues/32647
// Check for document symbols in js/ts/jsx/tsx and avoid triggering emmet for abbreviations of the form symbolName.sometext
// Presence of > or * or + in the abbreviation denotes valid abbreviation that should trigger emmet
if (!isStyleSheet(syntax) && (document.languageId === 'javascript' || document.languageId === 'javascriptreact' || document.languageId === 'typescript' || document.languageId === 'typescriptreact')) {
let abbreviation: string = extractAbbreviationResults.abbreviation;
// For the second condition, we don't want abbreviations that have [] characters but not ='s in them to expand
// In turn, users must explicitly expand abbreviations of the form Component[attr1 attr2], but it means we don't try to expand a[i].
if (abbreviation.startsWith('this.') || /\[[^\]=]*\]/.test(abbreviation)) {
isNoisePromise = Promise.resolve(true);
} else {
isNoisePromise = vscode.commands.executeCommand<vscode.SymbolInformation[] | undefined>('vscode.executeDocumentSymbolProvider', document.uri).then(symbols => {
return !!symbols && symbols.some(x => abbreviation === x.name || (abbreviation.startsWith(x.name + '.') && !/>|\*|\+/.test(abbreviation)));
});
}
}
return isNoisePromise.then((isNoise): vscode.CompletionList | undefined => {
if (isNoise) {
return undefined;
}
const config = getEmmetConfiguration(syntax!);
const result = helper.doComplete(toLSTextDocument(document), position, syntax, config);
// https://github.com/microsoft/vscode/issues/86941
if (result && result.items && result.items.length === 1) {
if (result.items[0].label === 'widows: ;') {
return undefined;
}
}
let newItems: vscode.CompletionItem[] = [];
if (result && result.items) {
result.items.forEach((item: any) => {
let newItem = new vscode.CompletionItem(item.label);
newItem.documentation = item.documentation;
newItem.detail = item.detail;
newItem.insertText = new vscode.SnippetString(item.textEdit.newText);
let oldrange = item.textEdit.range;
newItem.range = new vscode.Range(oldrange.start.line, oldrange.start.character, oldrange.end.line, oldrange.end.character);
newItem.filterText = item.filterText;
newItem.sortText = item.sortText;
if (emmetConfig['showSuggestionsAsSnippets'] === true) {
newItem.kind = vscode.CompletionItemKind.Snippet;
}
newItems.push(newItem);
});
}
return new vscode.CompletionList(newItems, true);
});
}
}
function toRange(lsRange: LSRange) {
return new vscode.Range(lsRange.start.line, lsRange.start.character, lsRange.end.line, lsRange.end.character);
}
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