@angular/cdk
Version:
Angular Material Component Development Kit
157 lines • 23.6 kB
JavaScript
"use strict";
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.ComponentResourceCollector = void 0;
const path_1 = require("path");
const ts = require("typescript");
const decorators_1 = require("./utils/decorators");
const functions_1 = require("./utils/functions");
const line_mappings_1 = require("./utils/line-mappings");
const property_name_1 = require("./utils/property-name");
/**
* Collector that can be used to find Angular templates and stylesheets referenced within
* given TypeScript source files (inline or external referenced files)
*/
class ComponentResourceCollector {
typeChecker;
_fileSystem;
resolvedTemplates = [];
resolvedStylesheets = [];
constructor(typeChecker, _fileSystem) {
this.typeChecker = typeChecker;
this._fileSystem = _fileSystem;
}
visitNode(node) {
if (node.kind === ts.SyntaxKind.ClassDeclaration) {
this._visitClassDeclaration(node);
}
}
_visitClassDeclaration(node) {
const decorators = ts.getDecorators(node);
if (!decorators || !decorators.length) {
return;
}
const ngDecorators = (0, decorators_1.getAngularDecorators)(this.typeChecker, decorators);
const componentDecorator = ngDecorators.find(dec => dec.name === 'Component');
// In case no "@Component" decorator could be found on the current class, skip.
if (!componentDecorator) {
return;
}
const decoratorCall = componentDecorator.node.expression;
// In case the component decorator call is not valid, skip this class declaration.
if (decoratorCall.arguments.length !== 1) {
return;
}
const componentMetadata = (0, functions_1.unwrapExpression)(decoratorCall.arguments[0]);
// Ensure that the component metadata is an object literal expression.
if (!ts.isObjectLiteralExpression(componentMetadata)) {
return;
}
const sourceFile = node.getSourceFile();
const filePath = this._fileSystem.resolve(sourceFile.fileName);
const sourceFileDirPath = (0, path_1.dirname)(sourceFile.fileName);
// Walk through all component metadata properties and determine the referenced
// HTML templates (either external or inline)
componentMetadata.properties.forEach(property => {
if (!ts.isPropertyAssignment(property)) {
return;
}
const propertyName = (0, property_name_1.getPropertyNameText)(property.name);
if (propertyName === 'styles' && ts.isArrayLiteralExpression(property.initializer)) {
property.initializer.elements.forEach(el => {
if (ts.isStringLiteralLike(el)) {
// Need to add an offset of one to the start because the template quotes are
// not part of the template content.
const templateStartIdx = el.getStart() + 1;
const content = stripBom(el.text);
this.resolvedStylesheets.push({
filePath,
container: node,
content,
inline: true,
start: templateStartIdx,
getCharacterAndLineOfPosition: pos => ts.getLineAndCharacterOfPosition(sourceFile, pos + templateStartIdx),
});
}
});
}
// In case there is an inline template specified, ensure that the value is statically
// analyzable by checking if the initializer is a string literal-like node.
if (propertyName === 'template' && ts.isStringLiteralLike(property.initializer)) {
// Need to add an offset of one to the start because the template quotes are
// not part of the template content.
const templateStartIdx = property.initializer.getStart() + 1;
this.resolvedTemplates.push({
filePath,
container: node,
content: property.initializer.text,
inline: true,
start: templateStartIdx,
getCharacterAndLineOfPosition: pos => ts.getLineAndCharacterOfPosition(sourceFile, pos + templateStartIdx),
});
}
if (propertyName === 'styleUrls' && ts.isArrayLiteralExpression(property.initializer)) {
property.initializer.elements.forEach(el => {
if (ts.isStringLiteralLike(el)) {
const stylesheetPath = this._fileSystem.resolve(sourceFileDirPath, el.text);
const stylesheet = this.resolveExternalStylesheet(stylesheetPath, node);
if (stylesheet) {
this.resolvedStylesheets.push(stylesheet);
}
}
});
}
if (propertyName === 'templateUrl' && ts.isStringLiteralLike(property.initializer)) {
const templateUrl = property.initializer.text;
const templatePath = this._fileSystem.resolve(sourceFileDirPath, templateUrl);
// In case the template does not exist in the file system, skip this
// external template.
if (!this._fileSystem.fileExists(templatePath)) {
return;
}
const fileContent = this._fileSystem.read(templatePath);
if (fileContent) {
const lineStartsMap = (0, line_mappings_1.computeLineStartsMap)(fileContent);
this.resolvedTemplates.push({
filePath: templatePath,
container: node,
content: fileContent,
inline: false,
start: 0,
getCharacterAndLineOfPosition: p => (0, line_mappings_1.getLineAndCharacterFromPosition)(lineStartsMap, p),
});
}
}
});
}
/** Resolves an external stylesheet by reading its content and computing line mappings. */
resolveExternalStylesheet(filePath, container) {
// Strip the BOM to avoid issues with the Sass compiler. See:
// https://github.com/angular/components/issues/24227#issuecomment-1200934258
const fileContent = stripBom(this._fileSystem.read(filePath) || '');
if (!fileContent) {
return null;
}
const lineStartsMap = (0, line_mappings_1.computeLineStartsMap)(fileContent);
return {
filePath: filePath,
container: container,
content: fileContent,
inline: false,
start: 0,
getCharacterAndLineOfPosition: pos => (0, line_mappings_1.getLineAndCharacterFromPosition)(lineStartsMap, pos),
};
}
}
exports.ComponentResourceCollector = ComponentResourceCollector;
/** Strips the BOM from a string. */
function stripBom(content) {
return content.replace(/\uFEFF/g, '');
}
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {dirname} from 'path';\nimport * as ts from 'typescript';\nimport {FileSystem, WorkspacePath} from './file-system';\nimport {getAngularDecorators} from './utils/decorators';\nimport {unwrapExpression} from './utils/functions';\nimport {\n  computeLineStartsMap,\n  getLineAndCharacterFromPosition,\n  LineAndCharacter,\n} from './utils/line-mappings';\nimport {getPropertyNameText} from './utils/property-name';\n\nexport interface ResolvedResource {\n  /** Class declaration that contains this resource. */\n  container: ts.ClassDeclaration | null;\n  /** File content of the given template. */\n  content: string;\n  /** Start offset of the resource content (e.g. in the inline source file) */\n  start: number;\n  /** Whether the given resource is inline or not. */\n  inline: boolean;\n  /** Path to the file that contains this resource. */\n  filePath: WorkspacePath;\n  /**\n   * Gets the character and line of a given position index in the resource.\n   * If the resource is declared inline within a TypeScript source file, the line and\n   * character are based on the full source file content.\n   */\n  getCharacterAndLineOfPosition: (pos: number) => LineAndCharacter;\n}\n\n/**\n * Collector that can be used to find Angular templates and stylesheets referenced within\n * given TypeScript source files (inline or external referenced files)\n */\nexport class ComponentResourceCollector {\n  resolvedTemplates: ResolvedResource[] = [];\n  resolvedStylesheets: ResolvedResource[] = [];\n\n  constructor(public typeChecker: ts.TypeChecker, private _fileSystem: FileSystem) {}\n\n  visitNode(node: ts.Node) {\n    if (node.kind === ts.SyntaxKind.ClassDeclaration) {\n      this._visitClassDeclaration(node as ts.ClassDeclaration);\n    }\n  }\n\n  private _visitClassDeclaration(node: ts.ClassDeclaration) {\n    const decorators = ts.getDecorators(node);\n\n    if (!decorators || !decorators.length) {\n      return;\n    }\n\n    const ngDecorators = getAngularDecorators(this.typeChecker, decorators);\n    const componentDecorator = ngDecorators.find(dec => dec.name === 'Component');\n\n    // In case no \"@Component\" decorator could be found on the current class, skip.\n    if (!componentDecorator) {\n      return;\n    }\n\n    const decoratorCall = componentDecorator.node.expression;\n\n    // In case the component decorator call is not valid, skip this class declaration.\n    if (decoratorCall.arguments.length !== 1) {\n      return;\n    }\n\n    const componentMetadata = unwrapExpression(decoratorCall.arguments[0]);\n\n    // Ensure that the component metadata is an object literal expression.\n    if (!ts.isObjectLiteralExpression(componentMetadata)) {\n      return;\n    }\n\n    const sourceFile = node.getSourceFile();\n    const filePath = this._fileSystem.resolve(sourceFile.fileName);\n    const sourceFileDirPath = dirname(sourceFile.fileName);\n\n    // Walk through all component metadata properties and determine the referenced\n    // HTML templates (either external or inline)\n    componentMetadata.properties.forEach(property => {\n      if (!ts.isPropertyAssignment(property)) {\n        return;\n      }\n\n      const propertyName = getPropertyNameText(property.name);\n\n      if (propertyName === 'styles' && ts.isArrayLiteralExpression(property.initializer)) {\n        property.initializer.elements.forEach(el => {\n          if (ts.isStringLiteralLike(el)) {\n            // Need to add an offset of one to the start because the template quotes are\n            // not part of the template content.\n            const templateStartIdx = el.getStart() + 1;\n            const content = stripBom(el.text);\n            this.resolvedStylesheets.push({\n              filePath,\n              container: node,\n              content,\n              inline: true,\n              start: templateStartIdx,\n              getCharacterAndLineOfPosition: pos =>\n                ts.getLineAndCharacterOfPosition(sourceFile, pos + templateStartIdx),\n            });\n          }\n        });\n      }\n\n      // In case there is an inline template specified, ensure that the value is statically\n      // analyzable by checking if the initializer is a string literal-like node.\n      if (propertyName === 'template' && ts.isStringLiteralLike(property.initializer)) {\n        // Need to add an offset of one to the start because the template quotes are\n        // not part of the template content.\n        const templateStartIdx = property.initializer.getStart() + 1;\n        this.resolvedTemplates.push({\n          filePath,\n          container: node,\n          content: property.initializer.text,\n          inline: true,\n          start: templateStartIdx,\n          getCharacterAndLineOfPosition: pos =>\n            ts.getLineAndCharacterOfPosition(sourceFile, pos + templateStartIdx),\n        });\n      }\n\n      if (propertyName === 'styleUrls' && ts.isArrayLiteralExpression(property.initializer)) {\n        property.initializer.elements.forEach(el => {\n          if (ts.isStringLiteralLike(el)) {\n            const stylesheetPath = this._fileSystem.resolve(sourceFileDirPath, el.text);\n            const stylesheet = this.resolveExternalStylesheet(stylesheetPath, node);\n\n            if (stylesheet) {\n              this.resolvedStylesheets.push(stylesheet);\n            }\n          }\n        });\n      }\n\n      if (propertyName === 'templateUrl' && ts.isStringLiteralLike(property.initializer)) {\n        const templateUrl = property.initializer.text;\n        const templatePath = this._fileSystem.resolve(sourceFileDirPath, templateUrl);\n\n        // In case the template does not exist in the file system, skip this\n        // external template.\n        if (!this._fileSystem.fileExists(templatePath)) {\n          return;\n        }\n\n        const fileContent = this._fileSystem.read(templatePath);\n\n        if (fileContent) {\n          const lineStartsMap = computeLineStartsMap(fileContent);\n\n          this.resolvedTemplates.push({\n            filePath: templatePath,\n            container: node,\n            content: fileContent,\n            inline: false,\n            start: 0,\n            getCharacterAndLineOfPosition: p => getLineAndCharacterFromPosition(lineStartsMap, p),\n          });\n        }\n      }\n    });\n  }\n\n  /** Resolves an external stylesheet by reading its content and computing line mappings. */\n  resolveExternalStylesheet(\n    filePath: WorkspacePath,\n    container: ts.ClassDeclaration | null,\n  ): ResolvedResource | null {\n    // Strip the BOM to avoid issues with the Sass compiler. See:\n    // https://github.com/angular/components/issues/24227#issuecomment-1200934258\n    const fileContent = stripBom(this._fileSystem.read(filePath) || '');\n\n    if (!fileContent) {\n      return null;\n    }\n\n    const lineStartsMap = computeLineStartsMap(fileContent);\n\n    return {\n      filePath: filePath,\n      container: container,\n      content: fileContent,\n      inline: false,\n      start: 0,\n      getCharacterAndLineOfPosition: pos => getLineAndCharacterFromPosition(lineStartsMap, pos),\n    };\n  }\n}\n\n/** Strips the BOM from a string. */\nfunction stripBom(content: string): string {\n  return content.replace(/\\uFEFF/g, '');\n}\n"]}