@angular/cdk
Version:
Angular Material Component Development Kit
120 lines • 15.9 kB
JavaScript
/**
* @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
*/
(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/cdk/schematics/update-tool/utils/imports", ["require", "exports", "typescript"], factory);
}
})(function (require, exports) {
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const ts = require("typescript");
/** Resolves the import of the specified identifier. */
function getImportOfIdentifier(node, typeChecker) {
// Free standing identifiers which resolve to an import will be handled
// as direct imports. e.g. "@Component()" where "Component" is an identifier
// referring to an import specifier.
const directImport = getSpecificImportOfIdentifier(node, typeChecker);
if (directImport !== null) {
return directImport;
}
else if (ts.isQualifiedName(node.parent) && node.parent.right === node) {
// Determines the import of a qualified name. e.g. "let t: core.Component". In that
// case, the import of the most left identifier will be determined ("core").
const qualifierRoot = getQualifiedNameRoot(node.parent);
if (qualifierRoot) {
const moduleName = getImportOfNamespacedIdentifier(qualifierRoot, typeChecker);
if (moduleName) {
return { moduleName, symbolName: node.text };
}
}
}
else if (ts.isPropertyAccessExpression(node.parent) && node.parent.name === node) {
// Determines the import of a property expression. e.g. "@core.Component". In that
// case, the import of the most left identifier will be determined ("core").
const rootIdentifier = getPropertyAccessRoot(node.parent);
if (rootIdentifier) {
const moduleName = getImportOfNamespacedIdentifier(rootIdentifier, typeChecker);
if (moduleName) {
return { moduleName, symbolName: node.text };
}
}
}
return null;
}
exports.getImportOfIdentifier = getImportOfIdentifier;
/**
* Resolves the import of the specified identifier. Expects the identifier to resolve
* to a fine-grained import declaration with import specifiers.
*/
function getSpecificImportOfIdentifier(node, typeChecker) {
const symbol = typeChecker.getSymbolAtLocation(node);
if (!symbol || !symbol.declarations || !symbol.declarations.length) {
return null;
}
const declaration = symbol.declarations[0];
if (!ts.isImportSpecifier(declaration)) {
return null;
}
// Since the declaration is an import specifier, we can walk up three times to get a reference
// to the import declaration node (NamedImports -> ImportClause -> ImportDeclaration).
const importDecl = declaration.parent.parent.parent;
if (!ts.isStringLiteral(importDecl.moduleSpecifier)) {
return null;
}
return {
moduleName: importDecl.moduleSpecifier.text,
symbolName: declaration.propertyName ? declaration.propertyName.text : declaration.name.text
};
}
/**
* Resolves the import of the specified identifier. Expects the identifier to
* resolve to a namespaced import declaration. e.g. "import * as core from ...".
*/
function getImportOfNamespacedIdentifier(node, typeChecker) {
const symbol = typeChecker.getSymbolAtLocation(node);
if (!symbol || !symbol.declarations || !symbol.declarations.length) {
return null;
}
const declaration = symbol.declarations[0];
if (!ts.isNamespaceImport(declaration)) {
return null;
}
// Since the declaration is a namespace import, we can walk up three times to get a reference
// to the import declaration node (NamespaceImport -> ImportClause -> ImportDeclaration).
const importDecl = declaration.parent.parent;
if (!ts.isStringLiteral(importDecl.moduleSpecifier)) {
return null;
}
return importDecl.moduleSpecifier.text;
}
/**
* Gets the root identifier of a qualified type chain. For example: "core.GestureConfig"
* will return the "core" identifier. Allowing us to find the import of "core".
*/
function getQualifiedNameRoot(name) {
while (ts.isQualifiedName(name.left)) {
name = name.left;
}
return ts.isIdentifier(name.left) ? name.left : null;
}
/**
* Gets the root identifier of a property access chain. For example: "core.GestureConfig"
* will return the "core" identifier. Allowing us to find the import of "core".
*/
function getPropertyAccessRoot(node) {
while (ts.isPropertyAccessExpression(node.expression)) {
node = node.expression;
}
return ts.isIdentifier(node.expression) ? node.expression : null;
}
});
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In that\n    // case, the import of the most left identifier will be determined (\"core\").\n    const qualifierRoot = getQualifiedNameRoot(node.parent);\n    if (qualifierRoot) {\n      const moduleName = getImportOfNamespacedIdentifier(qualifierRoot, typeChecker);\n      if (moduleName) {\n        return {moduleName, symbolName: node.text};\n      }\n    }\n  } else if (ts.isPropertyAccessExpression(node.parent) && node.parent.name === node) {\n    // Determines the import of a property expression. e.g. \"@core.Component\". In that\n    // case, the import of the most left identifier will be determined (\"core\").\n    const rootIdentifier = getPropertyAccessRoot(node.parent);\n    if (rootIdentifier) {\n      const moduleName = getImportOfNamespacedIdentifier(rootIdentifier, typeChecker);\n      if (moduleName) {\n        return {moduleName, symbolName: node.text};\n      }\n    }\n  }\n  return null;\n}\n\n/**\n * Resolves the import of the specified identifier. Expects the identifier to resolve\n * to a fine-grained import declaration with import specifiers.\n */\nfunction getSpecificImportOfIdentifier(node: ts.Identifier, typeChecker: ts.TypeChecker): Import|\n    null {\n  const symbol = typeChecker.getSymbolAtLocation(node);\n  if (!symbol || !symbol.declarations || !symbol.declarations.length) {\n    return null;\n  }\n  const declaration = symbol.declarations[0];\n  if (!ts.isImportSpecifier(declaration)) {\n    return null;\n  }\n  // Since the declaration is an import specifier, we can walk up three times to get a reference\n  // to the import declaration node (NamedImports -> ImportClause -> ImportDeclaration).\n  const importDecl = declaration.parent.parent.parent;\n  if (!ts.isStringLiteral(importDecl.moduleSpecifier)) {\n    return null;\n  }\n  return {\n    moduleName: importDecl.moduleSpecifier.text,\n    symbolName: declaration.propertyName ? declaration.propertyName.text : declaration.name.text\n  };\n}\n\n/**\n * Resolves the import of the specified identifier. Expects the identifier to\n * resolve to a namespaced import declaration. e.g. \"import * as core from ...\".\n */\nfunction getImportOfNamespacedIdentifier(node: ts.Identifier, typeChecker: ts.TypeChecker): string|\n    null {\n  const symbol = typeChecker.getSymbolAtLocation(node);\n  if (!symbol || !symbol.declarations || !symbol.declarations.length) {\n    return null;\n  }\n  const declaration = symbol.declarations[0];\n  if (!ts.isNamespaceImport(declaration)) {\n    return null;\n  }\n  // Since the declaration is a namespace import, we can walk up three times to get a reference\n  // to the import declaration node (NamespaceImport -> ImportClause -> ImportDeclaration).\n  const importDecl = declaration.parent.parent;\n  if (!ts.isStringLiteral(importDecl.moduleSpecifier)) {\n    return null;\n  }\n\n  return importDecl.moduleSpecifier.text;\n}\n\n\n/**\n * Gets the root identifier of a qualified type chain. For example: \"core.GestureConfig\"\n * will return the \"core\" identifier. Allowing us to find the import of \"core\".\n */\nfunction getQualifiedNameRoot(name: ts.QualifiedName): ts.Identifier|null {\n  while (ts.isQualifiedName(name.left)) {\n    name = name.left;\n  }\n  return ts.isIdentifier(name.left) ? name.left : null;\n}\n\n/**\n * Gets the root identifier of a property access chain. For example: \"core.GestureConfig\"\n * will return the \"core\" identifier. Allowing us to find the import of \"core\".\n */\nfunction getPropertyAccessRoot(node: ts.PropertyAccessExpression): ts.Identifier|null {\n  while (ts.isPropertyAccessExpression(node.expression)) {\n    node = node.expression;\n  }\n  return ts.isIdentifier(node.expression) ? node.expression : null;\n}\n"]}