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Copy pathservices.ts
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2204 lines (1864 loc) · 96.8 KB
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/// <reference path="..\compiler\program.ts"/>
/// <reference path="..\compiler\commandLineParser.ts"/>
/// <reference path='types.ts' />
/// <reference path='utilities.ts' />
/// <reference path='breakpoints.ts' />
/// <reference path='classifier.ts' />
/// <reference path='completions.ts' />
/// <reference path='documentHighlights.ts' />
/// <reference path='documentRegistry.ts' />
/// <reference path='findAllReferences.ts' />
/// <reference path='goToDefinition.ts' />
/// <reference path='jsDoc.ts' />
/// <reference path='jsTyping.ts' />
/// <reference path='navigateTo.ts' />
/// <reference path='navigationBar.ts' />
/// <reference path='outliningElementsCollector.ts' />
/// <reference path='patternMatcher.ts' />
/// <reference path='preProcess.ts' />
/// <reference path='rename.ts' />
/// <reference path='signatureHelp.ts' />
/// <reference path='symbolDisplay.ts' />
/// <reference path='transpile.ts' />
/// <reference path='formatting\formatting.ts' />
/// <reference path='formatting\smartIndenter.ts' />
/// <reference path='textChanges.ts' />
/// <reference path='codeFixProvider.ts' />
/// <reference path='refactorProvider.ts' />
/// <reference path='codefixes\fixes.ts' />
/// <reference path='refactors\refactors.ts' />
namespace ts {
/** The version of the language service API */
export const servicesVersion = "0.5";
/* @internal */
let ruleProvider: formatting.RulesProvider;
function createNode<TKind extends SyntaxKind>(kind: TKind, pos: number, end: number, parent?: Node): NodeObject | TokenObject<TKind> | IdentifierObject {
const node = isNodeKind(kind) ? new NodeObject(kind, pos, end) :
kind === SyntaxKind.Identifier ? new IdentifierObject(SyntaxKind.Identifier, pos, end) :
new TokenObject(kind, pos, end);
node.parent = parent;
return node;
}
class NodeObject implements Node {
public kind: SyntaxKind;
public pos: number;
public end: number;
public flags: NodeFlags;
public parent: Node;
public jsDoc: JSDoc[];
public original: Node;
public transformFlags: TransformFlags;
private _children: Node[];
constructor(kind: SyntaxKind, pos: number, end: number) {
this.pos = pos;
this.end = end;
this.flags = NodeFlags.None;
this.transformFlags = undefined;
this.parent = undefined;
this.kind = kind;
}
public getSourceFile(): SourceFile {
return getSourceFileOfNode(this);
}
public getStart(sourceFile?: SourceFileLike, includeJsDocComment?: boolean): number {
return getTokenPosOfNode(this, sourceFile, includeJsDocComment);
}
public getFullStart(): number {
return this.pos;
}
public getEnd(): number {
return this.end;
}
public getWidth(sourceFile?: SourceFile): number {
return this.getEnd() - this.getStart(sourceFile);
}
public getFullWidth(): number {
return this.end - this.pos;
}
public getLeadingTriviaWidth(sourceFile?: SourceFile): number {
return this.getStart(sourceFile) - this.pos;
}
public getFullText(sourceFile?: SourceFile): string {
return (sourceFile || this.getSourceFile()).text.substring(this.pos, this.end);
}
public getText(sourceFile?: SourceFile): string {
if (!sourceFile) {
sourceFile = this.getSourceFile();
}
return sourceFile.text.substring(this.getStart(sourceFile), this.getEnd());
}
private addSyntheticNodes(nodes: Node[], pos: number, end: number): number {
scanner.setTextPos(pos);
while (pos < end) {
const token = scanner.scan();
const textPos = scanner.getTextPos();
if (textPos <= end) {
nodes.push(createNode(token, pos, textPos, this));
}
pos = textPos;
if (token === SyntaxKind.EndOfFileToken) {
break;
}
}
return pos;
}
private createSyntaxList(nodes: NodeArray<Node>): Node {
const list = <NodeObject>createNode(SyntaxKind.SyntaxList, nodes.pos, nodes.end, this);
list._children = [];
let pos = nodes.pos;
for (const node of nodes) {
if (pos < node.pos) {
pos = this.addSyntheticNodes(list._children, pos, node.pos);
}
list._children.push(node);
pos = node.end;
}
if (pos < nodes.end) {
this.addSyntheticNodes(list._children, pos, nodes.end);
}
return list;
}
private createChildren(sourceFile?: SourceFileLike) {
if (!isNodeKind(this.kind)) {
this._children = emptyArray;
return;
}
if (isJSDocCommentContainingNode(this)) {
/** Don't add trivia for "tokens" since this is in a comment. */
const children: Node[] = [];
this.forEachChild(child => { children.push(child); });
this._children = children;
return;
}
const children: Node[] = [];
scanner.setText((sourceFile || this.getSourceFile()).text);
let pos = this.pos;
const processNode = (node: Node) => {
pos = this.addSyntheticNodes(children, pos, node.pos);
children.push(node);
pos = node.end;
};
const processNodes = (nodes: NodeArray<Node>) => {
if (pos < nodes.pos) {
pos = this.addSyntheticNodes(children, pos, nodes.pos);
}
children.push(this.createSyntaxList(nodes));
pos = nodes.end;
};
// jsDocComments need to be the first children
if (this.jsDoc) {
for (const jsDocComment of this.jsDoc) {
processNode(jsDocComment);
}
}
// For syntactic classifications, all trivia are classcified together, including jsdoc comments.
// For that to work, the jsdoc comments should still be the leading trivia of the first child.
// Restoring the scanner position ensures that.
pos = this.pos;
forEachChild(this, processNode, processNodes);
if (pos < this.end) {
this.addSyntheticNodes(children, pos, this.end);
}
scanner.setText(undefined);
this._children = children;
}
public getChildCount(sourceFile?: SourceFile): number {
if (!this._children) this.createChildren(sourceFile);
return this._children.length;
}
public getChildAt(index: number, sourceFile?: SourceFile): Node {
if (!this._children) this.createChildren(sourceFile);
return this._children[index];
}
public getChildren(sourceFile?: SourceFileLike): Node[] {
if (!this._children) this.createChildren(sourceFile);
return this._children;
}
public getFirstToken(sourceFile?: SourceFile): Node {
const children = this.getChildren(sourceFile);
if (!children.length) {
return undefined;
}
const child = ts.find(children, kid => kid.kind < SyntaxKind.FirstJSDocNode || kid.kind > SyntaxKind.LastJSDocNode);
return child.kind < SyntaxKind.FirstNode ?
child :
child.getFirstToken(sourceFile);
}
public getLastToken(sourceFile?: SourceFile): Node {
const children = this.getChildren(sourceFile);
const child = lastOrUndefined(children);
if (!child) {
return undefined;
}
return child.kind < SyntaxKind.FirstNode ? child : child.getLastToken(sourceFile);
}
public forEachChild<T>(cbNode: (node: Node) => T, cbNodeArray?: (nodes: NodeArray<Node>) => T): T {
return forEachChild(this, cbNode, cbNodeArray);
}
}
class TokenOrIdentifierObject implements Node {
public kind: SyntaxKind;
public pos: number;
public end: number;
public flags: NodeFlags;
public parent: Node;
public jsDocComments: JSDoc[];
constructor(pos: number, end: number) {
// Set properties in same order as NodeObject
this.pos = pos;
this.end = end;
this.flags = NodeFlags.None;
this.parent = undefined;
}
public getSourceFile(): SourceFile {
return getSourceFileOfNode(this);
}
public getStart(sourceFile?: SourceFileLike, includeJsDocComment?: boolean): number {
return getTokenPosOfNode(this, sourceFile, includeJsDocComment);
}
public getFullStart(): number {
return this.pos;
}
public getEnd(): number {
return this.end;
}
public getWidth(sourceFile?: SourceFile): number {
return this.getEnd() - this.getStart(sourceFile);
}
public getFullWidth(): number {
return this.end - this.pos;
}
public getLeadingTriviaWidth(sourceFile?: SourceFile): number {
return this.getStart(sourceFile) - this.pos;
}
public getFullText(sourceFile?: SourceFile): string {
return (sourceFile || this.getSourceFile()).text.substring(this.pos, this.end);
}
public getText(sourceFile?: SourceFile): string {
return (sourceFile || this.getSourceFile()).text.substring(this.getStart(), this.getEnd());
}
public getChildCount(): number {
return 0;
}
public getChildAt(): Node {
return undefined;
}
public getChildren(): Node[] {
return emptyArray;
}
public getFirstToken(): Node {
return undefined;
}
public getLastToken(): Node {
return undefined;
}
public forEachChild<T>(): T {
return undefined;
}
}
class SymbolObject implements Symbol {
flags: SymbolFlags;
escapedName: __String;
declarations?: Declaration[];
// Undefined is used to indicate the value has not been computed. If, after computing, the
// symbol has no doc comment, then the empty array will be returned.
documentationComment?: SymbolDisplayPart[];
// Undefined is used to indicate the value has not been computed. If, after computing, the
// symbol has no JSDoc tags, then the empty array will be returned.
tags?: JSDocTagInfo[];
constructor(flags: SymbolFlags, name: __String) {
this.flags = flags;
this.escapedName = name;
}
getFlags(): SymbolFlags {
return this.flags;
}
get name(): string {
return unescapeLeadingUnderscores(this.escapedName);
}
getEscapedName(): __String {
return this.escapedName;
}
getName(): string {
return this.name;
}
getDeclarations(): Declaration[] | undefined {
return this.declarations;
}
getDocumentationComment(): SymbolDisplayPart[] {
if (this.documentationComment === undefined) {
this.documentationComment = JsDoc.getJsDocCommentsFromDeclarations(this.declarations);
}
return this.documentationComment;
}
getJsDocTags(): JSDocTagInfo[] {
if (this.tags === undefined) {
this.tags = JsDoc.getJsDocTagsFromDeclarations(this.declarations);
}
return this.tags;
}
}
class TokenObject<TKind extends SyntaxKind> extends TokenOrIdentifierObject implements Token<TKind> {
public kind: TKind;
constructor(kind: TKind, pos: number, end: number) {
super(pos, end);
this.kind = kind;
}
}
class IdentifierObject extends TokenOrIdentifierObject implements Identifier {
public kind: SyntaxKind.Identifier;
public escapedText: __String;
_primaryExpressionBrand: any;
_memberExpressionBrand: any;
_leftHandSideExpressionBrand: any;
_updateExpressionBrand: any;
_unaryExpressionBrand: any;
_expressionBrand: any;
/*@internal*/typeArguments: NodeArray<TypeNode>;
constructor(_kind: SyntaxKind.Identifier, pos: number, end: number) {
super(pos, end);
}
get text(): string {
return unescapeLeadingUnderscores(this.escapedText);
}
}
IdentifierObject.prototype.kind = SyntaxKind.Identifier;
class TypeObject implements Type {
checker: TypeChecker;
flags: TypeFlags;
objectFlags?: ObjectFlags;
id: number;
symbol?: Symbol;
constructor(checker: TypeChecker, flags: TypeFlags) {
this.checker = checker;
this.flags = flags;
}
getFlags(): TypeFlags {
return this.flags;
}
getSymbol(): Symbol | undefined {
return this.symbol;
}
getProperties(): Symbol[] {
return this.checker.getPropertiesOfType(this);
}
getProperty(propertyName: string): Symbol | undefined {
return this.checker.getPropertyOfType(this, propertyName);
}
getApparentProperties(): Symbol[] {
return this.checker.getAugmentedPropertiesOfType(this);
}
getCallSignatures(): Signature[] {
return this.checker.getSignaturesOfType(this, SignatureKind.Call);
}
getConstructSignatures(): Signature[] {
return this.checker.getSignaturesOfType(this, SignatureKind.Construct);
}
getStringIndexType(): Type | undefined {
return this.checker.getIndexTypeOfType(this, IndexKind.String);
}
getNumberIndexType(): Type | undefined {
return this.checker.getIndexTypeOfType(this, IndexKind.Number);
}
getBaseTypes(): BaseType[] | undefined {
return this.flags & TypeFlags.Object && this.objectFlags & (ObjectFlags.Class | ObjectFlags.Interface)
? this.checker.getBaseTypes(<InterfaceType><Type>this)
: undefined;
}
getNonNullableType(): Type {
return this.checker.getNonNullableType(this);
}
}
class SignatureObject implements Signature {
checker: TypeChecker;
declaration: SignatureDeclaration;
typeParameters?: TypeParameter[];
parameters: Symbol[];
thisParameter: Symbol;
resolvedReturnType: Type;
minTypeArgumentCount: number;
minArgumentCount: number;
hasRestParameter: boolean;
hasLiteralTypes: boolean;
// Undefined is used to indicate the value has not been computed. If, after computing, the
// symbol has no doc comment, then the empty array will be returned.
documentationComment?: SymbolDisplayPart[];
// Undefined is used to indicate the value has not been computed. If, after computing, the
// symbol has no doc comment, then the empty array will be returned.
jsDocTags?: JSDocTagInfo[];
constructor(checker: TypeChecker) {
this.checker = checker;
}
getDeclaration(): SignatureDeclaration {
return this.declaration;
}
getTypeParameters(): TypeParameter[] | undefined {
return this.typeParameters;
}
getParameters(): Symbol[] {
return this.parameters;
}
getReturnType(): Type {
return this.checker.getReturnTypeOfSignature(this);
}
getDocumentationComment(): SymbolDisplayPart[] {
if (this.documentationComment === undefined) {
this.documentationComment = this.declaration ? JsDoc.getJsDocCommentsFromDeclarations([this.declaration]) : [];
}
return this.documentationComment;
}
getJsDocTags(): JSDocTagInfo[] {
if (this.jsDocTags === undefined) {
this.jsDocTags = this.declaration ? JsDoc.getJsDocTagsFromDeclarations([this.declaration]) : [];
}
return this.jsDocTags;
}
}
class SourceFileObject extends NodeObject implements SourceFile {
public kind: SyntaxKind.SourceFile;
public _declarationBrand: any;
public fileName: string;
public path: Path;
public text: string;
public scriptSnapshot: IScriptSnapshot;
public lineMap: ReadonlyArray<number>;
public statements: NodeArray<Statement>;
public endOfFileToken: Token<SyntaxKind.EndOfFileToken>;
public amdDependencies: { name: string; path: string }[];
public moduleName: string;
public referencedFiles: FileReference[];
public typeReferenceDirectives: FileReference[];
public syntacticDiagnostics: Diagnostic[];
public referenceDiagnostics: Diagnostic[];
public parseDiagnostics: Diagnostic[];
public bindDiagnostics: Diagnostic[];
public isDeclarationFile: boolean;
public isDefaultLib: boolean;
public hasNoDefaultLib: boolean;
public externalModuleIndicator: Node; // The first node that causes this file to be an external module
public commonJsModuleIndicator: Node; // The first node that causes this file to be a CommonJS module
public nodeCount: number;
public identifierCount: number;
public symbolCount: number;
public version: string;
public scriptKind: ScriptKind;
public languageVersion: ScriptTarget;
public languageVariant: LanguageVariant;
public identifiers: Map<string>;
public nameTable: UnderscoreEscapedMap<number>;
public resolvedModules: Map<ResolvedModuleFull>;
public resolvedTypeReferenceDirectiveNames: Map<ResolvedTypeReferenceDirective>;
public imports: StringLiteral[];
public moduleAugmentations: StringLiteral[];
private namedDeclarations: Map<Declaration[]>;
public ambientModuleNames: string[];
public checkJsDirective: CheckJsDirective | undefined;
public possiblyContainDynamicImport: boolean;
constructor(kind: SyntaxKind, pos: number, end: number) {
super(kind, pos, end);
}
public update(newText: string, textChangeRange: TextChangeRange): SourceFile {
return updateSourceFile(this, newText, textChangeRange);
}
public getLineAndCharacterOfPosition(position: number): LineAndCharacter {
return ts.getLineAndCharacterOfPosition(this, position);
}
public getLineStarts(): ReadonlyArray<number> {
return getLineStarts(this);
}
public getPositionOfLineAndCharacter(line: number, character: number): number {
return ts.getPositionOfLineAndCharacter(this, line, character);
}
public getLineEndOfPosition(pos: number): number {
const { line } = this.getLineAndCharacterOfPosition(pos);
const lineStarts = this.getLineStarts();
let lastCharPos: number;
if (line + 1 >= lineStarts.length) {
lastCharPos = this.getEnd();
}
if (!lastCharPos) {
lastCharPos = lineStarts[line + 1] - 1;
}
const fullText = this.getFullText();
// if the new line is "\r\n", we should return the last non-new-line-character position
return fullText[lastCharPos] === "\n" && fullText[lastCharPos - 1] === "\r" ? lastCharPos - 1 : lastCharPos;
}
public getNamedDeclarations(): Map<Declaration[]> {
if (!this.namedDeclarations) {
this.namedDeclarations = this.computeNamedDeclarations();
}
return this.namedDeclarations;
}
private computeNamedDeclarations(): Map<Declaration[]> {
const result = createMultiMap<Declaration>();
forEachChild(this, visit);
return result;
function addDeclaration(declaration: Declaration) {
const name = getDeclarationName(declaration);
if (name) {
result.add(name, declaration);
}
}
function getDeclarations(name: string) {
let declarations = result.get(name);
if (!declarations) {
result.set(name, declarations = []);
}
return declarations;
}
function getDeclarationName(declaration: Declaration) {
const name = getNameOfDeclaration(declaration);
if (name) {
const result = getTextOfIdentifierOrLiteral(name as (Identifier | LiteralExpression));
if (result !== undefined) {
return result;
}
if (name.kind === SyntaxKind.ComputedPropertyName) {
const expr = (<ComputedPropertyName>name).expression;
if (expr.kind === SyntaxKind.PropertyAccessExpression) {
return (<PropertyAccessExpression>expr).name.text;
}
return getTextOfIdentifierOrLiteral(expr as (Identifier | LiteralExpression));
}
}
return undefined;
}
function visit(node: Node): void {
switch (node.kind) {
case SyntaxKind.FunctionDeclaration:
case SyntaxKind.FunctionExpression:
case SyntaxKind.MethodDeclaration:
case SyntaxKind.MethodSignature:
const functionDeclaration = <FunctionLikeDeclaration>node;
const declarationName = getDeclarationName(functionDeclaration);
if (declarationName) {
const declarations = getDeclarations(declarationName);
const lastDeclaration = lastOrUndefined(declarations);
// Check whether this declaration belongs to an "overload group".
if (lastDeclaration && functionDeclaration.parent === lastDeclaration.parent && functionDeclaration.symbol === lastDeclaration.symbol) {
// Overwrite the last declaration if it was an overload
// and this one is an implementation.
if (functionDeclaration.body && !(<FunctionLikeDeclaration>lastDeclaration).body) {
declarations[declarations.length - 1] = functionDeclaration;
}
}
else {
declarations.push(functionDeclaration);
}
}
forEachChild(node, visit);
break;
case SyntaxKind.ClassDeclaration:
case SyntaxKind.ClassExpression:
case SyntaxKind.InterfaceDeclaration:
case SyntaxKind.TypeAliasDeclaration:
case SyntaxKind.EnumDeclaration:
case SyntaxKind.ModuleDeclaration:
case SyntaxKind.ImportEqualsDeclaration:
case SyntaxKind.ExportSpecifier:
case SyntaxKind.ImportSpecifier:
case SyntaxKind.ImportClause:
case SyntaxKind.NamespaceImport:
case SyntaxKind.GetAccessor:
case SyntaxKind.SetAccessor:
case SyntaxKind.TypeLiteral:
addDeclaration(<Declaration>node);
forEachChild(node, visit);
break;
case SyntaxKind.Parameter:
// Only consider parameter properties
if (!hasModifier(node, ModifierFlags.ParameterPropertyModifier)) {
break;
}
// falls through
case SyntaxKind.VariableDeclaration:
case SyntaxKind.BindingElement: {
const decl = <VariableDeclaration>node;
if (isBindingPattern(decl.name)) {
forEachChild(decl.name, visit);
break;
}
if (decl.initializer) {
visit(decl.initializer);
}
}
// falls through
case SyntaxKind.EnumMember:
case SyntaxKind.PropertyDeclaration:
case SyntaxKind.PropertySignature:
addDeclaration(<Declaration>node);
break;
case SyntaxKind.ExportDeclaration:
// Handle named exports case e.g.:
// export {a, b as B} from "mod";
if ((<ExportDeclaration>node).exportClause) {
forEach((<ExportDeclaration>node).exportClause.elements, visit);
}
break;
case SyntaxKind.ImportDeclaration:
const importClause = (<ImportDeclaration>node).importClause;
if (importClause) {
// Handle default import case e.g.:
// import d from "mod";
if (importClause.name) {
addDeclaration(importClause);
}
// Handle named bindings in imports e.g.:
// import * as NS from "mod";
// import {a, b as B} from "mod";
if (importClause.namedBindings) {
if (importClause.namedBindings.kind === SyntaxKind.NamespaceImport) {
addDeclaration(<NamespaceImport>importClause.namedBindings);
}
else {
forEach((<NamedImports>importClause.namedBindings).elements, visit);
}
}
}
break;
default:
forEachChild(node, visit);
}
}
}
}
class SourceMapSourceObject implements SourceMapSource {
lineMap: number[];
constructor (public fileName: string, public text: string, public skipTrivia?: (pos: number) => number) {}
public getLineAndCharacterOfPosition(pos: number): LineAndCharacter {
return ts.getLineAndCharacterOfPosition(this, pos);
}
}
function getServicesObjectAllocator(): ObjectAllocator {
return {
getNodeConstructor: () => NodeObject,
getTokenConstructor: () => TokenObject,
getIdentifierConstructor: () => IdentifierObject,
getSourceFileConstructor: () => SourceFileObject,
getSymbolConstructor: () => SymbolObject,
getTypeConstructor: () => TypeObject,
getSignatureConstructor: () => SignatureObject,
getSourceMapSourceConstructor: () => SourceMapSourceObject,
};
}
/// Language Service
// Information about a specific host file.
interface HostFileInformation {
hostFileName: string;
version: string;
scriptSnapshot: IScriptSnapshot;
scriptKind: ScriptKind;
}
export interface DisplayPartsSymbolWriter extends SymbolWriter {
displayParts(): SymbolDisplayPart[];
}
/* @internal */
export function toEditorSettings(options: FormatCodeOptions | FormatCodeSettings): FormatCodeSettings;
export function toEditorSettings(options: EditorOptions | EditorSettings): EditorSettings;
export function toEditorSettings(optionsAsMap: MapLike<any>): MapLike<any> {
let allPropertiesAreCamelCased = true;
for (const key in optionsAsMap) {
if (hasProperty(optionsAsMap, key) && !isCamelCase(key)) {
allPropertiesAreCamelCased = false;
break;
}
}
if (allPropertiesAreCamelCased) {
return optionsAsMap;
}
const settings: MapLike<any> = {};
for (const key in optionsAsMap) {
if (hasProperty(optionsAsMap, key)) {
const newKey = isCamelCase(key) ? key : key.charAt(0).toLowerCase() + key.substr(1);
settings[newKey] = optionsAsMap[key];
}
}
return settings;
}
function isCamelCase(s: string) {
return !s.length || s.charAt(0) === s.charAt(0).toLowerCase();
}
export function displayPartsToString(displayParts: SymbolDisplayPart[]) {
if (displayParts) {
return map(displayParts, displayPart => displayPart.text).join("");
}
return "";
}
export function getDefaultCompilerOptions(): CompilerOptions {
// Always default to "ScriptTarget.ES5" for the language service
return {
target: ScriptTarget.ES5,
jsx: JsxEmit.Preserve
};
}
export function getSupportedCodeFixes() {
return codefix.getSupportedErrorCodes();
}
// Cache host information about script Should be refreshed
// at each language service public entry point, since we don't know when
// the set of scripts handled by the host changes.
class HostCache {
private fileNameToEntry: Map<HostFileInformation>;
private _compilationSettings: CompilerOptions;
private currentDirectory: string;
constructor(private host: LanguageServiceHost, getCanonicalFileName: (fileName: string) => string) {
// script id => script index
this.currentDirectory = host.getCurrentDirectory();
this.fileNameToEntry = createMap<HostFileInformation>();
// Initialize the list with the root file names
const rootFileNames = host.getScriptFileNames();
for (const fileName of rootFileNames) {
this.createEntry(fileName, toPath(fileName, this.currentDirectory, getCanonicalFileName));
}
// store the compilation settings
this._compilationSettings = host.getCompilationSettings() || getDefaultCompilerOptions();
}
public compilationSettings() {
return this._compilationSettings;
}
private createEntry(fileName: string, path: Path) {
let entry: HostFileInformation;
const scriptSnapshot = this.host.getScriptSnapshot(fileName);
if (scriptSnapshot) {
entry = {
hostFileName: fileName,
version: this.host.getScriptVersion(fileName),
scriptSnapshot,
scriptKind: getScriptKind(fileName, this.host)
};
}
this.fileNameToEntry.set(path, entry);
return entry;
}
public getEntryByPath(path: Path): HostFileInformation {
return this.fileNameToEntry.get(path);
}
public containsEntryByPath(path: Path): boolean {
return this.fileNameToEntry.has(path);
}
public getOrCreateEntryByPath(fileName: string, path: Path): HostFileInformation {
return this.containsEntryByPath(path)
? this.getEntryByPath(path)
: this.createEntry(fileName, path);
}
public getRootFileNames(): string[] {
const fileNames: string[] = [];
this.fileNameToEntry.forEach(value => {
if (value) {
fileNames.push(value.hostFileName);
}
});
return fileNames;
}
public getVersion(path: Path): string {
const file = this.getEntryByPath(path);
return file && file.version;
}
public getScriptSnapshot(path: Path): IScriptSnapshot {
const file = this.getEntryByPath(path);
return file && file.scriptSnapshot;
}
}
class SyntaxTreeCache {
// For our syntactic only features, we also keep a cache of the syntax tree for the
// currently edited file.
private currentFileName: string;
private currentFileVersion: string;
private currentFileScriptSnapshot: IScriptSnapshot;
private currentSourceFile: SourceFile;
constructor(private host: LanguageServiceHost) {
}
public getCurrentSourceFile(fileName: string): SourceFile {
const scriptSnapshot = this.host.getScriptSnapshot(fileName);
if (!scriptSnapshot) {
// The host does not know about this file.
throw new Error("Could not find file: '" + fileName + "'.");
}
const scriptKind = getScriptKind(fileName, this.host);
const version = this.host.getScriptVersion(fileName);
let sourceFile: SourceFile;
if (this.currentFileName !== fileName) {
// This is a new file, just parse it
sourceFile = createLanguageServiceSourceFile(fileName, scriptSnapshot, ScriptTarget.Latest, version, /*setNodeParents*/ true, scriptKind);
}
else if (this.currentFileVersion !== version) {
// This is the same file, just a newer version. Incrementally parse the file.
const editRange = scriptSnapshot.getChangeRange(this.currentFileScriptSnapshot);
sourceFile = updateLanguageServiceSourceFile(this.currentSourceFile, scriptSnapshot, version, editRange);
}
if (sourceFile) {
// All done, ensure state is up to date
this.currentFileVersion = version;
this.currentFileName = fileName;
this.currentFileScriptSnapshot = scriptSnapshot;
this.currentSourceFile = sourceFile;
}
return this.currentSourceFile;
}
}
function setSourceFileFields(sourceFile: SourceFile, scriptSnapshot: IScriptSnapshot, version: string) {
sourceFile.version = version;
sourceFile.scriptSnapshot = scriptSnapshot;
}
export function createLanguageServiceSourceFile(fileName: string, scriptSnapshot: IScriptSnapshot, scriptTarget: ScriptTarget, version: string, setNodeParents: boolean, scriptKind?: ScriptKind): SourceFile {
const text = scriptSnapshot.getText(0, scriptSnapshot.getLength());
const sourceFile = createSourceFile(fileName, text, scriptTarget, setNodeParents, scriptKind);
setSourceFileFields(sourceFile, scriptSnapshot, version);
return sourceFile;
}
export let disableIncrementalParsing = false;
export function updateLanguageServiceSourceFile(sourceFile: SourceFile, scriptSnapshot: IScriptSnapshot, version: string, textChangeRange: TextChangeRange, aggressiveChecks?: boolean): SourceFile {
// If we were given a text change range, and our version or open-ness changed, then
// incrementally parse this file.
if (textChangeRange) {
if (version !== sourceFile.version) {
// Once incremental parsing is ready, then just call into this function.
if (!disableIncrementalParsing) {
let newText: string;
// grab the fragment from the beginning of the original text to the beginning of the span
const prefix = textChangeRange.span.start !== 0
? sourceFile.text.substr(0, textChangeRange.span.start)
: "";
// grab the fragment from the end of the span till the end of the original text
const suffix = textSpanEnd(textChangeRange.span) !== sourceFile.text.length
? sourceFile.text.substr(textSpanEnd(textChangeRange.span))
: "";
if (textChangeRange.newLength === 0) {
// edit was a deletion - just combine prefix and suffix
newText = prefix && suffix ? prefix + suffix : prefix || suffix;
}
else {
// it was actual edit, fetch the fragment of new text that correspond to new span
const changedText = scriptSnapshot.getText(textChangeRange.span.start, textChangeRange.span.start + textChangeRange.newLength);
// combine prefix, changed text and suffix
newText = prefix && suffix
? prefix + changedText + suffix
: prefix
? (prefix + changedText)
: (changedText + suffix);
}
const newSourceFile = updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks);
setSourceFileFields(newSourceFile, scriptSnapshot, version);
// after incremental parsing nameTable might not be up-to-date
// drop it so it can be lazily recreated later
newSourceFile.nameTable = undefined;
// dispose all resources held by old script snapshot
if (sourceFile !== newSourceFile && sourceFile.scriptSnapshot) {
if (sourceFile.scriptSnapshot.dispose) {
sourceFile.scriptSnapshot.dispose();
}