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'use strict'
import * as vscode from 'vscode'
const backend = require("../../native")
let docToSyntax;
let uris = {
syntaxTree: vscode.Uri.parse('libsyntax-rust://syntaxtree')
}
export function activate(context: vscode.ExtensionContext) {
let textDocumentContentProvider = new TextDocumentContentProvider()
let dispose = (disposable) => {
context.subscriptions.push(disposable);
}
let registerCommand = (name, f) => {
dispose(vscode.commands.registerCommand(name, f))
}
docToSyntax = documentToFile(context.subscriptions, () => {
let emitter = textDocumentContentProvider.eventEmitter
emitter.fire(uris.syntaxTree)
let syntax = activeSyntax()
setHighlights(vscode.window.activeTextEditor, syntax.highlight())
})
dispose(vscode.workspace.registerTextDocumentContentProvider(
'libsyntax-rust',
textDocumentContentProvider
))
registerCommand('libsyntax-rust.syntaxTree', () => openDoc(uris.syntaxTree))
registerCommand('libsyntax-rust.extendSelection', () => {
let editor = vscode.window.activeTextEditor
let file = activeSyntax()
if (editor == null || file == null) return
editor.selections = editor.selections.map((s) => {
let range = file.extendSelection(s)
if (range == null) return null
return new vscode.Selection(range.start, range.end)
})
})
}
export function deactivate() { }
export class Syntax {
imp;
doc: vscode.TextDocument;
constructor(imp, doc: vscode.TextDocument) {
this.imp = imp
this.doc = doc
}
syntaxTree(): string { return this.imp.syntaxTree() }
highlight(): Array<[number, number, string]> { return this.imp.highlight() }
extendSelection(range: vscode.Range): vscode.Range {
let range_ = fromVsRange(this.doc, range);
let extRange = this.imp.extendSelection(range_[0], range_[1]);
return toVsRange(this.doc, extRange);
}
}
function activeDoc() {
return vscode.window.activeTextEditor.document
}
function activeSyntax(): Syntax {
let doc = activeDoc()
if (doc == null) return null
return docToSyntax(doc)
}
async function openDoc(uri: vscode.Uri) {
let document = await vscode.workspace.openTextDocument(uri)
return vscode.window.showTextDocument(document, vscode.ViewColumn.Two, true)
}
function documentToFile(disposables: vscode.Disposable[], onChange) {
let docs = {}
function update(doc: vscode.TextDocument, file) {
let key = doc.uri.toString()
if (file == null) {
delete docs[key]
} else {
docs[key] = file
}
onChange(doc)
}
function get(doc: vscode.TextDocument) {
return docs[doc.uri.toString()]
}
function isKnownDoc(doc: vscode.TextDocument) {
return doc.fileName.endsWith('.rs')
}
function createFile(text: String) {
console.time("parsing")
let res = new backend.RustFile(text);
console.timeEnd("parsing")
return res
}
vscode.workspace.onDidChangeTextDocument((event: vscode.TextDocumentChangeEvent) => {
let doc = event.document
if (!isKnownDoc(event.document)) return
update(doc, null)
}, null, disposables)
vscode.workspace.onDidOpenTextDocument((doc: vscode.TextDocument) => {
if (!isKnownDoc(doc)) return
update(doc, createFile(doc.getText()))
}, null, disposables)
vscode.workspace.onDidCloseTextDocument((doc: vscode.TextDocument) => {
update(doc, null)
}, null, disposables)
return (doc: vscode.TextDocument) => {
if (!isKnownDoc(doc)) return null
if (!get(doc)) {
update(doc, createFile(doc.getText()))
}
let imp = get(doc)
return new Syntax(imp, doc)
}
}
export class TextDocumentContentProvider implements vscode.TextDocumentContentProvider {
public eventEmitter = new vscode.EventEmitter<vscode.Uri>()
public syntaxTree: string = "Not available"
public provideTextDocumentContent(uri: vscode.Uri): vscode.ProviderResult<string> {
let syntax = activeSyntax()
if (syntax == null) return
if (uri.toString() == uris.syntaxTree.toString()) {
return syntax.syntaxTree()
}
}
get onDidChange(): vscode.Event<vscode.Uri> {
return this.eventEmitter.event
}
}
const decorations = (() => {
const decor = (obj) => vscode.window.createTextEditorDecorationType({ color: obj })
return {
background: decor("#3F3F3F"),
error: vscode.window.createTextEditorDecorationType({
borderColor: "red",
borderStyle: "none none dashed none",
}),
comment: decor("#7F9F7F"),
string: decor("#CC9393"),
keyword: decor("#F0DFAF"),
function: decor("#93E0E3"),
parameter: decor("#94BFF3"),
builtin: decor("#DD6718"),
text: decor("#DCDCCC"),
attribute: decor("#BFEBBF"),
literal: decor("#DFAF8F"),
}
})()
function setHighlights(
editor: vscode.TextEditor,
highlihgs: Array<[number, number, string]>
) {
let byTag = {}
for (let tag in decorations) {
byTag[tag] = []
}
for (let [start, end, tag] of highlihgs) {
if (!byTag[tag]) {
console.log(`unknown tag ${tag}`)
continue
}
let range = toVsRange(editor.document, [start, end])
byTag[tag].push(range)
}
for (let tag in byTag) {
let dec = decorations[tag]
let ranges = byTag[tag]
editor.setDecorations(dec, ranges)
}
}
export function toVsRange(doc: vscode.TextDocument, range: [number, number]): vscode.Range {
return new vscode.Range(
doc.positionAt(range[0]),
doc.positionAt(range[1]),
)
}
function fromVsRange(doc: vscode.TextDocument, range: vscode.Range): [number, number] {
return [doc.offsetAt(range.start), doc.offsetAt(range.end)]
}
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