mirror of
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278 lines
11 KiB
JavaScript
278 lines
11 KiB
JavaScript
/**
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* Copyright 2019 Google Inc. All rights reserved.
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* Modifications copyright (c) Microsoft Corporation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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const ts = require('typescript');
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const path = require('path');
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const Documentation = require('./Documentation');
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const EventEmitter = require('events');
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module.exports = { checkSources, expandPrefix };
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/**
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* @param {!Array<!import('../Source')>} sources
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*/
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function checkSources(sources) {
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// special treatment for Events.js
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const classEvents = new Map();
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const eventsSources = sources.filter(source => source.name().startsWith('events.ts'));
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for (const eventsSource of eventsSources) {
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const {Events} = require(eventsSource.filePath().endsWith('.js') ? eventsSource.filePath() : eventsSource.filePath().replace('/src/', '/lib/').replace('.ts', '.js'));
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for (const [className, events] of Object.entries(Events))
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classEvents.set(className, Array.from(Object.values(events)).filter(e => typeof e === 'string').map(e => Documentation.Member.createEvent(e)));
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}
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const excludeClasses = new Set([]);
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const program = ts.createProgram({
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options: {
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allowJs: true,
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target: ts.ScriptTarget.ESNext,
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},
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rootNames: sources.map(source => source.filePath())
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});
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const checker = program.getTypeChecker();
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const sourceFiles = program.getSourceFiles();
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const errors = [];
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/** @type {!Array<!Documentation.Class>} */
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const classes = [];
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/** @type {!Map<string, string>} */
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const inheritance = new Map();
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sourceFiles.filter(x => !x.fileName.includes('node_modules')).map(x => visit(x));
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const documentation = new Documentation(recreateClassesWithInheritance(classes, inheritance));
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return {errors, documentation};
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/**
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* @param {!Array<!Documentation.Class>} classes
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* @param {!Map<string, string>} inheritance
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* @return {!Array<!Documentation.Class>}
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*/
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function recreateClassesWithInheritance(classes, inheritance) {
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const classesByName = new Map(classes.map(cls => [cls.name, cls]));
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return classes.map(cls => {
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const membersMap = new Map();
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for (let wp = cls; wp; wp = classesByName.get(inheritance.get(wp.name))) {
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for (const member of wp.membersArray) {
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// Member was overridden.
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const memberId = member.kind + ':' + member.name;
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if (membersMap.has(memberId))
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continue;
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membersMap.set(memberId, member);
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}
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}
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return new Documentation.Class(expandPrefix(cls.name), Array.from(membersMap.values()));
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});
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}
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/**
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* @param {!ts.Node} node
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*/
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function visit(node) {
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if (ts.isClassDeclaration(node) || ts.isClassExpression(node)) {
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const symbol = node.name ? checker.getSymbolAtLocation(node.name) : node.symbol;
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let className = symbol.getName();
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if (className === '__class') {
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let parent = node;
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while (parent.parent)
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parent = parent.parent;
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className = path.basename(parent.fileName, '.js');
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}
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if (className && !excludeClasses.has(className)) {
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classes.push(serializeClass(className, symbol, node));
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const parentClassName = parentClass(node);
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if (parentClassName)
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inheritance.set(className, parentClassName);
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excludeClasses.add(className);
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}
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}
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if (!node.getSourceFile().fileName.endsWith('platform.ts')) {
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// Only relative imports.
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if (ts.isImportDeclaration(node) && ts.isStringLiteral(node.moduleSpecifier)) {
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const module = node.moduleSpecifier.text;
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if (!module.startsWith('.')) {
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const lac = ts.getLineAndCharacterOfPosition(node.getSourceFile(), node.moduleSpecifier.pos);
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errors.push(`Disallowed import "${module}" at ${node.getSourceFile().fileName}:${lac.line + 1}`);
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}
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}
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// No references to external types.
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if (ts.isTypeReferenceNode(node)) {
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const isPlatformReference = ts.isQualifiedName(node.typeName) && ts.isIdentifier(node.typeName.left) && node.typeName.left.escapedText === 'platform';
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if (!isPlatformReference) {
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const type = checker.getTypeAtLocation(node);
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if (type.symbol && type.symbol.valueDeclaration) {
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const source = type.symbol.valueDeclaration.getSourceFile();
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if (source.fileName.includes('@types')) {
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const lac = ts.getLineAndCharacterOfPosition(node.getSourceFile(), node.pos);
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errors.push(`Disallowed type reference "${type.symbol.escapedName}" at ${node.getSourceFile().fileName}:${lac.line + 1}:${lac.character + 1}`);
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}
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}
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}
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}
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}
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ts.forEachChild(node, visit);
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}
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function parentClass(classNode) {
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for (const herigateClause of classNode.heritageClauses || []) {
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for (const heritageType of herigateClause.types) {
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let expression = heritageType.expression;
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if (expression.kind === ts.SyntaxKind.PropertyAccessExpression)
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expression = expression.name;
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if (classNode.name.escapedText !== expression.escapedText)
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return expression.escapedText;
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}
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}
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return null;
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}
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function serializeSymbol(symbol, circular = []) {
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const type = checker.getTypeOfSymbolAtLocation(symbol, symbol.valueDeclaration);
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const name = symbol.getName();
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if (symbol.valueDeclaration && symbol.valueDeclaration.dotDotDotToken) {
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const innerType = serializeType(type.typeArguments ? type.typeArguments[0] : type, circular);
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innerType.name = '...' + innerType.name;
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return Documentation.Member.createProperty('...' + name, innerType);
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}
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return Documentation.Member.createProperty(name, serializeType(type, circular));
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}
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/**
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* @param {!ts.ObjectType} type
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*/
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function isRegularObject(type) {
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if (type.isIntersection())
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return true;
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if (!type.objectFlags)
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return false;
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if (!('aliasSymbol' in type))
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return false;
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if (type.getConstructSignatures().length)
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return false;
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if (type.getCallSignatures().length)
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return false;
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if (type.isUnion())
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return false;
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return true;
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}
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/**
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* @param {!ts.Type} type
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* @return {!Documentation.Type}
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*/
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function serializeType(type, circular = []) {
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let typeName = checker.typeToString(type);
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if (typeName === 'any' || typeName === '{ [x: string]: string; }')
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typeName = 'Object';
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const nextCircular = [typeName].concat(circular);
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if (typeName === 'Selector') {
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if (!excludeClasses.has(typeName)) {
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const properties = type.getProperties().map(property => serializeSymbol(property, nextCircular));
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classes.push(new Documentation.Class(typeName, properties));
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excludeClasses.add(typeName);
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}
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return new Documentation.Type(typeName, []);
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}
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if (isRegularObject(type)) {
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let properties = undefined;
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if (!circular.includes(typeName))
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properties = type.getProperties().map(property => serializeSymbol(property, nextCircular));
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return new Documentation.Type('Object', properties);
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}
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if (type.isUnion() && (typeName.includes('|') || type.types.every(type => type.isStringLiteral() || type.intrinsicName === 'number'))) {
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const types = type.types.map(type => serializeType(type, circular));
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const name = types.map(type => type.name).join('|');
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const properties = [].concat(...types.map(type => type.properties));
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return new Documentation.Type(name.replace(/false\|true/g, 'boolean'), properties);
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}
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if (type.typeArguments && type.symbol) {
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const properties = [];
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const innerTypeNames = [];
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for (const typeArgument of type.typeArguments) {
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const innerType = serializeType(typeArgument, nextCircular);
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if (innerType.properties)
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properties.push(...innerType.properties);
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innerTypeNames.push(innerType.name);
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}
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if (innerTypeNames.length === 1 && innerTypeNames[0] === 'void')
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return new Documentation.Type(type.symbol.name);
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return new Documentation.Type(`${type.symbol.name}<${innerTypeNames.join(', ')}>`, properties);
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}
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return new Documentation.Type(expandPrefix(typeName), []);
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}
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/**
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* @param {string} className
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* @param {!ts.Symbol} symbol
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* @return {}
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*/
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function serializeClass(className, symbol, node) {
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/** @type {!Array<!Documentation.Member>} */
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const members = classEvents.get(className) || [];
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for (const [name, member] of symbol.members || []) {
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if (name.startsWith('_'))
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continue;
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if (EventEmitter.prototype.hasOwnProperty(name))
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continue;
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if (className === 'CDPSession' && name === 'send') {
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// special case CDPSession.send, which has a stricter private API than the public API
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members.push(Documentation.Member.createMethod('send', [
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Documentation.Member.createProperty('method', new Documentation.Type('string')),
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Documentation.Member.createProperty('params', new Documentation.Type('Object')),
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], new Documentation.Type('Promise<Object>')));
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continue;
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}
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const memberType = checker.getTypeOfSymbolAtLocation(member, member.valueDeclaration);
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const signature = memberType.getCallSignatures()[0];
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if (signature)
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members.push(serializeSignature(name, signature));
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else
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members.push(serializeProperty(name, memberType));
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}
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return new Documentation.Class(className, members);
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}
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/**
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* @param {string} name
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* @param {!ts.Signature} signature
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*/
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function serializeSignature(name, signature) {
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const parameters = signature.parameters.map(s => serializeSymbol(s));
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const returnType = serializeType(signature.getReturnType());
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return Documentation.Member.createMethod(name, parameters, returnType.name !== 'void' ? returnType : null);
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}
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/**
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* @param {string} name
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* @param {!ts.Type} type
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*/
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function serializeProperty(name, type) {
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return Documentation.Member.createProperty(name, serializeType(type));
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}
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}
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function expandPrefix(name) {
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if (name.startsWith('CR'))
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return 'Chromium' + name.substring(2);
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if (name.startsWith('FF'))
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return 'Firefox' + name.substring(2);
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if (name.startsWith('WK'))
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return 'WebKit' + name.substring(2);
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return name;
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}
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