@angular/core
Version:
Angular - the core framework
109 lines • 16.2 kB
JavaScript
/**
* @license
* Copyright Google Inc. 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
*/
(function (factory) {
if (typeof module === "object" && typeof module.exports === "object") {
var v = factory(require, exports);
if (v !== undefined) module.exports = v;
}
else if (typeof define === "function" && define.amd) {
define("@angular/core/schematics/utils/ng_component_template", ["require", "exports", "fs", "path", "typescript", "@angular/core/schematics/utils/line_mappings", "@angular/core/schematics/utils/ng_decorators", "@angular/core/schematics/utils/typescript/functions", "@angular/core/schematics/utils/typescript/property_name"], factory);
}
})(function (require, exports) {
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const fs_1 = require("fs");
const path_1 = require("path");
const ts = require("typescript");
const line_mappings_1 = require("@angular/core/schematics/utils/line_mappings");
const ng_decorators_1 = require("@angular/core/schematics/utils/ng_decorators");
const functions_1 = require("@angular/core/schematics/utils/typescript/functions");
const property_name_1 = require("@angular/core/schematics/utils/typescript/property_name");
/**
* Visitor that can be used to determine Angular templates referenced within given
* TypeScript source files (inline templates or external referenced templates)
*/
class NgComponentTemplateVisitor {
constructor(typeChecker) {
this.typeChecker = typeChecker;
this.resolvedTemplates = [];
}
visitNode(node) {
if (node.kind === ts.SyntaxKind.ClassDeclaration) {
this.visitClassDeclaration(node);
}
ts.forEachChild(node, n => this.visitNode(n));
}
visitClassDeclaration(node) {
if (!node.decorators || !node.decorators.length) {
return;
}
const ngDecorators = ng_decorators_1.getAngularDecorators(this.typeChecker, node.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 = 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 sourceFileName = 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 = property_name_1.getPropertyNameText(property.name);
// 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;
const filePath = path_1.resolve(sourceFileName);
this.resolvedTemplates.push({
filePath: filePath,
container: node,
content: property.initializer.text,
inline: true,
start: templateStartIdx,
getCharacterAndLineOfPosition: pos => ts.getLineAndCharacterOfPosition(sourceFile, pos + templateStartIdx)
});
}
if (propertyName === 'templateUrl' && ts.isStringLiteralLike(property.initializer)) {
const templatePath = path_1.resolve(path_1.dirname(sourceFileName), property.initializer.text);
// In case the template does not exist in the file system, skip this
// external template.
if (!fs_1.existsSync(templatePath)) {
return;
}
const fileContent = fs_1.readFileSync(templatePath, 'utf8');
const lineStartsMap = line_mappings_1.computeLineStartsMap(fileContent);
this.resolvedTemplates.push({
filePath: templatePath,
container: node,
content: fileContent,
inline: false,
start: 0,
getCharacterAndLineOfPosition: pos => line_mappings_1.getLineAndCharacterFromPosition(lineStartsMap, pos),
});
}
});
}
}
exports.NgComponentTemplateVisitor = NgComponentTemplateVisitor;
});
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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 {existsSync, readFileSync} from 'fs';\nimport {dirname, resolve} from 'path';\nimport * as ts from 'typescript';\n\nimport {computeLineStartsMap, getLineAndCharacterFromPosition} from './line_mappings';\nimport {getAngularDecorators} from './ng_decorators';\nimport {unwrapExpression} from './typescript/functions';\nimport {getPropertyNameText} from './typescript/property_name';\n\nexport interface ResolvedTemplate {\n  /** Class declaration that contains this template. */\n  container: ts.ClassDeclaration;\n  /** File content of the given template. */\n  content: string;\n  /** Start offset of the template content (e.g. in the inline source file) */\n  start: number;\n  /** Whether the given template is inline or not. */\n  inline: boolean;\n  /** Path to the file that contains this template. */\n  filePath: string;\n  /**\n   * Gets the character and line of a given position index in the template.\n   * If the template 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) => {\n    character: number, line: number\n  };\n}\n\n/**\n * Visitor that can be used to determine Angular templates referenced within given\n * TypeScript source files (inline templates or external referenced templates)\n */\nexport class NgComponentTemplateVisitor {\n  resolvedTemplates: ResolvedTemplate[] = [];\n\n  constructor(public typeChecker: ts.TypeChecker) {}\n\n  visitNode(node: ts.Node) {\n    if (node.kind === ts.SyntaxKind.ClassDeclaration) {\n      this.visitClassDeclaration(node as ts.ClassDeclaration);\n    }\n\n    ts.forEachChild(node, n => this.visitNode(n));\n  }\n\n  private visitClassDeclaration(node: ts.ClassDeclaration) {\n    if (!node.decorators || !node.decorators.length) {\n      return;\n    }\n\n    const ngDecorators = getAngularDecorators(this.typeChecker, node.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 sourceFileName = 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      // 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        const filePath = resolve(sourceFileName);\n        this.resolvedTemplates.push({\n          filePath: 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      if (propertyName === 'templateUrl' && ts.isStringLiteralLike(property.initializer)) {\n        const templatePath = resolve(dirname(sourceFileName), property.initializer.text);\n\n        // In case the template does not exist in the file system, skip this\n        // external template.\n        if (!existsSync(templatePath)) {\n          return;\n        }\n\n        const fileContent = readFileSync(templatePath, 'utf8');\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: pos => getLineAndCharacterFromPosition(lineStartsMap, pos),\n        });\n      }\n    });\n  }\n}\n"]}