@angular/language-service/src/utils.js

/**
 * @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/language-service/src/utils", ["require", "exports", "tslib", "@angular/compiler", "path"], factory);
    }
})(function (require, exports) {
    "use strict";
    Object.defineProperty(exports, "__esModule", { value: true });
    exports.extractAbsoluteFilePath = exports.findOutputBinding = exports.invertMap = exports.getPathToNodeAtPosition = exports.findTemplateAstAt = exports.diagnosticInfoFromTemplateInfo = exports.getSelectors = exports.isStructuralDirective = exports.isNarrower = exports.offsetSpan = exports.inSpan = exports.spanOf = void 0;
    var tslib_1 = require("tslib");
    var compiler_1 = require("@angular/compiler");
    var path = require("path");
    function isParseSourceSpan(value) {
        return value && !!value.start;
    }
    function spanOf(span) {
        if (!span)
            return undefined;
        if (isParseSourceSpan(span)) {
            return { start: span.start.offset, end: span.end.offset };
        }
        else {
            if (span.endSourceSpan) {
                return { start: span.sourceSpan.start.offset, end: span.endSourceSpan.end.offset };
            }
            else if (span.children && span.children.length) {
                return {
                    start: span.sourceSpan.start.offset,
                    end: spanOf(span.children[span.children.length - 1]).end
                };
            }
            return { start: span.sourceSpan.start.offset, end: span.sourceSpan.end.offset };
        }
    }
    exports.spanOf = spanOf;
    function inSpan(position, span, exclusive) {
        return span != null &&
            (exclusive ? position >= span.start && position < span.end :
                position >= span.start && position <= span.end);
    }
    exports.inSpan = inSpan;
    function offsetSpan(span, amount) {
        return { start: span.start + amount, end: span.end + amount };
    }
    exports.offsetSpan = offsetSpan;
    function isNarrower(spanA, spanB) {
        return spanA.start >= spanB.start && spanA.end <= spanB.end;
    }
    exports.isNarrower = isNarrower;
    function isStructuralDirective(type) {
        var e_1, _a;
        var _b;
        try {
            for (var _c = tslib_1.__values(type.diDeps), _d = _c.next(); !_d.done; _d = _c.next()) {
                var diDep = _d.value;
                var diDepName = compiler_1.identifierName((_b = diDep.token) === null || _b === void 0 ? void 0 : _b.identifier);
                if (diDepName === compiler_1.Identifiers.TemplateRef.name ||
                    diDepName === compiler_1.Identifiers.ViewContainerRef.name) {
                    return true;
                }
            }
        }
        catch (e_1_1) { e_1 = { error: e_1_1 }; }
        finally {
            try {
                if (_d && !_d.done && (_a = _c.return)) _a.call(_c);
            }
            finally { if (e_1) throw e_1.error; }
        }
        return false;
    }
    exports.isStructuralDirective = isStructuralDirective;
    function getSelectors(info) {
        var e_2, _a, e_3, _b;
        var map = new Map();
        var results = [];
        try {
            for (var _c = tslib_1.__values(info.directives), _d = _c.next(); !_d.done; _d = _c.next()) {
                var directive = _d.value;
                var selectors = compiler_1.CssSelector.parse(directive.selector);
                try {
                    for (var selectors_1 = (e_3 = void 0, tslib_1.__values(selectors)), selectors_1_1 = selectors_1.next(); !selectors_1_1.done; selectors_1_1 = selectors_1.next()) {
                        var selector = selectors_1_1.value;
                        results.push(selector);
                        map.set(selector, directive);
                    }
                }
                catch (e_3_1) { e_3 = { error: e_3_1 }; }
                finally {
                    try {
                        if (selectors_1_1 && !selectors_1_1.done && (_b = selectors_1.return)) _b.call(selectors_1);
                    }
                    finally { if (e_3) throw e_3.error; }
                }
            }
        }
        catch (e_2_1) { e_2 = { error: e_2_1 }; }
        finally {
            try {
                if (_d && !_d.done && (_a = _c.return)) _a.call(_c);
            }
            finally { if (e_2) throw e_2.error; }
        }
        return { selectors: results, map: map };
    }
    exports.getSelectors = getSelectors;
    function diagnosticInfoFromTemplateInfo(info) {
        return {
            fileName: info.template.fileName,
            offset: info.template.span.start,
            query: info.template.query,
            members: info.template.members,
            htmlAst: info.htmlAst,
            templateAst: info.templateAst,
            source: info.template.source,
        };
    }
    exports.diagnosticInfoFromTemplateInfo = diagnosticInfoFromTemplateInfo;
    function findTemplateAstAt(ast, position) {
        var path = [];
        var visitor = new /** @class */ (function (_super) {
            tslib_1.__extends(class_1, _super);
            function class_1() {
                return _super !== null && _super.apply(this, arguments) || this;
            }
            class_1.prototype.visit = function (ast) {
                var span = spanOf(ast);
                if (inSpan(position, span)) {
                    var len = path.length;
                    if (!len || isNarrower(span, spanOf(path[len - 1]))) {
                        path.push(ast);
                    }
                }
                else {
                    // Returning a value here will result in the children being skipped.
                    return true;
                }
            };
            class_1.prototype.visitEmbeddedTemplate = function (ast, context) {
                return this.visitChildren(context, function (visit) {
                    // Ignore reference, variable and providers
                    visit(ast.attrs);
                    visit(ast.directives);
                    visit(ast.children);
                });
            };
            class_1.prototype.visitElement = function (ast, context) {
                return this.visitChildren(context, function (visit) {
                    // Ingnore providers
                    visit(ast.attrs);
                    visit(ast.inputs);
                    visit(ast.outputs);
                    visit(ast.references);
                    visit(ast.directives);
                    visit(ast.children);
                });
            };
            class_1.prototype.visitDirective = function (ast, context) {
                // Ignore the host properties of a directive
                var result = this.visitChildren(context, function (visit) {
                    visit(ast.inputs);
                });
                // We never care about the diretive itself, just its inputs.
                if (path[path.length - 1] === ast) {
                    path.pop();
                }
                return result;
            };
            return class_1;
        }(compiler_1.RecursiveTemplateAstVisitor));
        compiler_1.templateVisitAll(visitor, ast);
        return new compiler_1.AstPath(path, position);
    }
    exports.findTemplateAstAt = findTemplateAstAt;
    /**
     * Find the tightest node at the specified `position` from the AST `nodes`, and
     * return the path to the node.
     * @param nodes HTML AST nodes
     * @param position
     */
    function getPathToNodeAtPosition(nodes, position) {
        var path = [];
        var visitor = new /** @class */ (function (_super) {
            tslib_1.__extends(class_2, _super);
            function class_2() {
                return _super !== null && _super.apply(this, arguments) || this;
            }
            class_2.prototype.visit = function (ast) {
                var span = spanOf(ast);
                if (inSpan(position, span)) {
                    path.push(ast);
                }
                else {
                    // Returning a truthy value here will skip all children and terminate
                    // the visit.
                    return true;
                }
            };
            return class_2;
        }(compiler_1.RecursiveVisitor));
        compiler_1.visitAll(visitor, nodes);
        return new compiler_1.AstPath(path, position);
    }
    exports.getPathToNodeAtPosition = getPathToNodeAtPosition;
    /**
     * Inverts an object's key-value pairs.
     */
    function invertMap(obj) {
        var e_4, _a;
        var result = {};
        try {
            for (var _b = tslib_1.__values(Object.keys(obj)), _c = _b.next(); !_c.done; _c = _b.next()) {
                var name_1 = _c.value;
                var v = obj[name_1];
                result[v] = name_1;
            }
        }
        catch (e_4_1) { e_4 = { error: e_4_1 }; }
        finally {
            try {
                if (_c && !_c.done && (_a = _b.return)) _a.call(_b);
            }
            finally { if (e_4) throw e_4.error; }
        }
        return result;
    }
    exports.invertMap = invertMap;
    /**
     * Finds the directive member providing a template output binding, if one exists.
     * @param info aggregate template AST information
     * @param path narrowing
     */
    function findOutputBinding(binding, path, query) {
        var e_5, _a;
        var element = path.first(compiler_1.ElementAst);
        if (element) {
            try {
                for (var _b = tslib_1.__values(element.directives), _c = _b.next(); !_c.done; _c = _b.next()) {
                    var directive = _c.value;
                    var invertedOutputs = invertMap(directive.directive.outputs);
                    var fieldName = invertedOutputs[binding.name];
                    if (fieldName) {
                        var classSymbol = query.getTypeSymbol(directive.directive.type.reference);
                        if (classSymbol) {
                            return classSymbol.members().get(fieldName);
                        }
                    }
                }
            }
            catch (e_5_1) { e_5 = { error: e_5_1 }; }
            finally {
                try {
                    if (_c && !_c.done && (_a = _b.return)) _a.call(_b);
                }
                finally { if (e_5) throw e_5.error; }
            }
        }
    }
    exports.findOutputBinding = findOutputBinding;
    /**
     * Returns an absolute path from the text in `node`. If the text is already
     * an absolute path, return it as is, otherwise join the path with the filename
     * of the source file.
     */
    function extractAbsoluteFilePath(node) {
        var url = node.text;
        return path.isAbsolute(url) ? url : path.join(path.dirname(node.getSourceFile().fileName), url);
    }
    exports.extractAbsoluteFilePath = extractAbsoluteFilePath;
});
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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 {AstPath, BoundEventAst, CompileDirectiveSummary, CompileTypeMetadata, CssSelector, DirectiveAst, ElementAst, EmbeddedTemplateAst, HtmlAstPath, identifierName, Identifiers, Node, ParseSourceSpan, RecursiveTemplateAstVisitor, RecursiveVisitor, TemplateAst, TemplateAstPath, templateVisitAll, visitAll} from '@angular/compiler';\nimport * as path from 'path';\n\nimport {AstResult, DiagnosticTemplateInfo, SelectorInfo, Span, Symbol, SymbolQuery} from './types';\n\ninterface SpanHolder {\n  sourceSpan: ParseSourceSpan;\n  endSourceSpan?: ParseSourceSpan|null;\n  children?: SpanHolder[];\n}\n\nfunction isParseSourceSpan(value: any): value is ParseSourceSpan {\n  return value && !!value.start;\n}\n\nexport function spanOf(span: SpanHolder): Span;\nexport function spanOf(span: ParseSourceSpan): Span;\nexport function spanOf(span: SpanHolder|ParseSourceSpan|undefined): Span|undefined;\nexport function spanOf(span?: SpanHolder|ParseSourceSpan): Span|undefined {\n  if (!span) return undefined;\n  if (isParseSourceSpan(span)) {\n    return {start: span.start.offset, end: span.end.offset};\n  } else {\n    if (span.endSourceSpan) {\n      return {start: span.sourceSpan.start.offset, end: span.endSourceSpan.end.offset};\n    } else if (span.children && span.children.length) {\n      return {\n        start: span.sourceSpan.start.offset,\n        end: spanOf(span.children[span.children.length - 1])!.end\n      };\n    }\n    return {start: span.sourceSpan.start.offset, end: span.sourceSpan.end.offset};\n  }\n}\n\nexport function inSpan(position: number, span?: Span, exclusive?: boolean): boolean {\n  return span != null &&\n      (exclusive ? position >= span.start && position < span.end :\n                   position >= span.start && position <= span.end);\n}\n\nexport function offsetSpan(span: Span, amount: number): Span {\n  return {start: span.start + amount, end: span.end + amount};\n}\n\nexport function isNarrower(spanA: Span, spanB: Span): boolean {\n  return spanA.start >= spanB.start && spanA.end <= spanB.end;\n}\n\nexport function isStructuralDirective(type: CompileTypeMetadata): boolean {\n  for (const diDep of type.diDeps) {\n    const diDepName = identifierName(diDep.token?.identifier);\n    if (diDepName === Identifiers.TemplateRef.name ||\n        diDepName === Identifiers.ViewContainerRef.name) {\n      return true;\n    }\n  }\n  return false;\n}\n\nexport function getSelectors(info: AstResult): SelectorInfo {\n  const map = new Map<CssSelector, CompileDirectiveSummary>();\n  const results: CssSelector[] = [];\n  for (const directive of info.directives) {\n    const selectors: CssSelector[] = CssSelector.parse(directive.selector!);\n    for (const selector of selectors) {\n      results.push(selector);\n      map.set(selector, directive);\n    }\n  }\n  return {selectors: results, map};\n}\n\nexport function diagnosticInfoFromTemplateInfo(info: AstResult): DiagnosticTemplateInfo {\n  return {\n    fileName: info.template.fileName,\n    offset: info.template.span.start,\n    query: info.template.query,\n    members: info.template.members,\n    htmlAst: info.htmlAst,\n    templateAst: info.templateAst,\n    source: info.template.source,\n  };\n}\n\nexport function findTemplateAstAt(ast: TemplateAst[], position: number): TemplateAstPath {\n  const path: TemplateAst[] = [];\n  const visitor = new class extends RecursiveTemplateAstVisitor {\n    visit(ast: TemplateAst): any {\n      let span = spanOf(ast);\n      if (inSpan(position, span)) {\n        const len = path.length;\n        if (!len || isNarrower(span, spanOf(path[len - 1]))) {\n          path.push(ast);\n        }\n      } else {\n        // Returning a value here will result in the children being skipped.\n        return true;\n      }\n    }\n\n    visitEmbeddedTemplate(ast: EmbeddedTemplateAst, context: any): any {\n      return this.visitChildren(context, visit => {\n        // Ignore reference, variable and providers\n        visit(ast.attrs);\n        visit(ast.directives);\n        visit(ast.children);\n      });\n    }\n\n    visitElement(ast: ElementAst, context: any): any {\n      return this.visitChildren(context, visit => {\n        // Ingnore providers\n        visit(ast.attrs);\n        visit(ast.inputs);\n        visit(ast.outputs);\n        visit(ast.references);\n        visit(ast.directives);\n        visit(ast.children);\n      });\n    }\n\n    visitDirective(ast: DirectiveAst, context: any): any {\n      // Ignore the host properties of a directive\n      const result = this.visitChildren(context, visit => {\n        visit(ast.inputs);\n      });\n      // We never care about the diretive itself, just its inputs.\n      if (path[path.length - 1] === ast) {\n        path.pop();\n      }\n      return result;\n    }\n  };\n\n  templateVisitAll(visitor, ast);\n\n  return new AstPath<TemplateAst>(path, position);\n}\n\n/**\n * Find the tightest node at the specified `position` from the AST `nodes`, and\n * return the path to the node.\n * @param nodes HTML AST nodes\n * @param position\n */\nexport function getPathToNodeAtPosition(nodes: Node[], position: number): HtmlAstPath {\n  const path: Node[] = [];\n  const visitor = new class extends RecursiveVisitor {\n    visit(ast: Node) {\n      const span = spanOf(ast);\n      if (inSpan(position, span)) {\n        path.push(ast);\n      } else {\n        // Returning a truthy value here will skip all children and terminate\n        // the visit.\n        return true;\n      }\n    }\n  };\n  visitAll(visitor, nodes);\n  return new AstPath<Node>(path, position);\n}\n\n\n/**\n * Inverts an object's key-value pairs.\n */\nexport function invertMap(obj: {[name: string]: string}): {[name: string]: string} {\n  const result: {[name: string]: string} = {};\n  for (const name of Object.keys(obj)) {\n    const v = obj[name];\n    result[v] = name;\n  }\n  return result;\n}\n\n\n/**\n * Finds the directive member providing a template output binding, if one exists.\n * @param info aggregate template AST information\n * @param path narrowing\n */\nexport function findOutputBinding(\n    binding: BoundEventAst, path: TemplateAstPath, query: SymbolQuery): Symbol|undefined {\n  const element = path.first(ElementAst);\n  if (element) {\n    for (const directive of element.directives) {\n      const invertedOutputs = invertMap(directive.directive.outputs);\n      const fieldName = invertedOutputs[binding.name];\n      if (fieldName) {\n        const classSymbol = query.getTypeSymbol(directive.directive.type.reference);\n        if (classSymbol) {\n          return classSymbol.members().get(fieldName);\n        }\n      }\n    }\n  }\n}\n\n/**\n * Returns an absolute path from the text in `node`. If the text is already\n * an absolute path, return it as is, otherwise join the path with the filename\n * of the source file.\n */\nexport function extractAbsoluteFilePath(node: ts.StringLiteralLike) {\n  const url = node.text;\n  return path.isAbsolute(url) ? url : path.join(path.dirname(node.getSourceFile().fileName), url);\n}\n"]}