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extension.ts
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// The module 'vscode' contains the VS Code extensibility API
// Import the module and reference it with the alias vscode in your code below
import * as vscode from 'vscode';
import * as util from 'util';
import * as path from 'path';
import * as fs from 'fs';
import {DocumentController} from './document';
import * as tm from './text-mate';
import * as api from './scope-info';
/** Tracks all documents that substitutions are being applied to */
let documents = new Map<vscode.Uri,DocumentController>();
export let textMateRegistry : tm.Registry;
interface ExtensionGrammar {
language?: string, scopeName?: string, path?: string, embeddedLanguages?: {[scopeName:string]:string}, injectTo?: string[]
}
interface ExtensionPackage {
contributes?: {
languages?: {id: string, configuration: string}[],
grammars?: ExtensionGrammar[],
}
}
function getLanguageScopeName(languageId: string) : string {
try {
const languages =
vscode.extensions.all
.filter(x => x.packageJSON && x.packageJSON.contributes && x.packageJSON.contributes.grammars)
.reduce((a: ExtensionGrammar[],b) => [...a, ...(b.packageJSON as ExtensionPackage).contributes.grammars], []);
const matchingLanguages = languages.filter(g => g.language === languageId);
if(matchingLanguages.length > 0) {
// console.info(`Mapping language ${languageId} to initial scope ${matchingLanguages[0].scopeName}`);
return matchingLanguages[0].scopeName;
}
} catch(err) { }
return undefined;
}
const grammarLocator : tm.IGrammarLocator = {
getFilePath: function(scopeName: string) : string {
try {
const grammars =
vscode.extensions.all
.filter(x => x.packageJSON && x.packageJSON.contributes && x.packageJSON.contributes.grammars)
.reduce((a: (ExtensionGrammar&{extensionPath: string})[],b) => [...a, ...(b.packageJSON as ExtensionPackage).contributes.grammars.map(x => Object.assign({extensionPath: b.extensionPath}, x))], []);
const matchingLanguages = grammars.filter(g => g.scopeName === scopeName);
// let match : RegExpExecArray;
// if(matchingLanguages.length === 0 && (match = /^source[.](.*)/.exec(scopeName)))
// matchingLanguages = grammars.filter(g => g.language === match[1]);
if(matchingLanguages.length > 0) {
const ext = matchingLanguages[0];
const file = path.join(ext.extensionPath, ext.path);
console.info(`Scope-info: found grammar for ${scopeName} at ${file}`)
return file;
}
} catch(err) { }
return undefined;
}
}
async function provideHoverInfo(subscriptions: vscode.Disposable[]) {
const allLanguages =
(await vscode.languages.getLanguages())
.filter(x => getLanguageScopeName(x) !== undefined);
subscriptions.push(vscode.languages.registerHoverProvider(allLanguages, {provideHover: (doc,pos,tok) : vscode.Hover => {
if(!isHoverEnabled())
return;
try {
const prettyDoc = documents.get(doc.uri);
if(prettyDoc) {
const token = prettyDoc.getScopeAt(pos);
if(token)
return {contents: [`Token: \`${token.text}\``, ...token.scopes], range: token.range}
}
} catch(err) {
}
return undefined;
}}));
}
export let workspaceState : vscode.Memento;
/** initialize everything; main entry point */
export function activate(context: vscode.ExtensionContext) : api.ScopeInfoAPI {
workspaceState = context.workspaceState;
function registerCommand(commandId:string, run:(...args:any[])=>void): void {
context.subscriptions.push(vscode.commands.registerCommand(commandId, run));
}
registerCommand('extension.disableScopeHover', disableScopeHover);
registerCommand('extension.enableScopeHover', enableScopeHover);
context.subscriptions.push(vscode.workspace.onDidOpenTextDocument(openDocument));
context.subscriptions.push(vscode.workspace.onDidCloseTextDocument(closeDocument));
provideHoverInfo(context.subscriptions);
reloadGrammar();
const api : api.ScopeInfoAPI = {
getScopeAt(document: vscode.TextDocument, position: vscode.Position) : api.Token|null {
try {
const prettyDoc = documents.get(document.uri);
if(prettyDoc) {
return prettyDoc.getScopeAt(position);
}
} catch(err) {
}
return null;
},
getScopeForLanguage(language: string) : string|null {
return getLanguageScopeName(language) || null;
},
async getGrammar(scopeName: string) : Promise<api.IGrammar|null> {
try {
if(textMateRegistry)
return await loadGrammar(scopeName);
} catch(err) { }
return null;
}
}
return api;
}
let hoverEnabled = false;
export function isHoverEnabled() : boolean {
return hoverEnabled;
// return workspaceState.get('showHoverInfo', false as boolean) === true;
}
export function setHover(enabled: boolean) : void {
hoverEnabled = enabled;
// workspaceState.update('showHoverInfo', enabled);
}
/** Re-read the settings and recreate substitutions for all documents */
function reloadGrammar() {
try {
textMateRegistry = new tm.Registry(grammarLocator);
} catch(err) {
textMateRegistry = undefined;
console.error(err);
}
// Recreate the documents
unloadDocuments();
for(const doc of vscode.workspace.textDocuments)
openDocument(doc);
}
function disableScopeHover() {
setHover(false);
unloadDocuments();
}
function enableScopeHover() {
setHover(true);
reloadGrammar();
}
function loadGrammar(scopeName: string) : Promise<tm.IGrammar> {
return new Promise<tm.IGrammar>((resolve,reject) => {
try {
textMateRegistry.loadGrammar(scopeName, (err, grammar) => {
if(err)
reject(err)
else
resolve(grammar);
})
} catch(err) {
reject(err);
}
})
}
async function openDocument(doc: vscode.TextDocument) {
try {
const prettyDoc = documents.get(doc.uri);
if(prettyDoc) {
prettyDoc.refresh();
} else if(textMateRegistry) {
const scopeName = getLanguageScopeName(doc.languageId);
if(scopeName) {
const grammar = await loadGrammar(scopeName);
documents.set(doc.uri, new DocumentController(doc, grammar));
}
}
} catch(err) {
}
}
function closeDocument(doc: vscode.TextDocument) {
const prettyDoc = documents.get(doc.uri);
if(prettyDoc) {
prettyDoc.dispose();
documents.delete(doc.uri);
}
}
function unloadDocuments() {
for(const prettyDoc of documents.values()) {
prettyDoc.dispose();
}
documents.clear();
}
/** clean-up; this extension is being unloaded */
export function deactivate() {
unloadDocuments();
}