@angular/language-service
Version:
Angular - language services
214 lines • 28.9 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/language-service/src/expressions", ["require", "exports", "tslib", "@angular/compiler", "@angular/language-service/src/expression_type", "@angular/language-service/src/types", "@angular/language-service/src/utils"], factory);
}
})(function (require, exports) {
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.getExpressionSymbol = exports.getExpressionCompletions = void 0;
var tslib_1 = require("tslib");
var compiler_1 = require("@angular/compiler");
var expression_type_1 = require("@angular/language-service/src/expression_type");
var types_1 = require("@angular/language-service/src/types");
var utils_1 = require("@angular/language-service/src/utils");
function findAstAt(ast, position, excludeEmpty) {
if (excludeEmpty === void 0) { excludeEmpty = false; }
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) {
if ((!excludeEmpty || ast.sourceSpan.start < ast.sourceSpan.end) &&
utils_1.inSpan(position, ast.sourceSpan)) {
var isNotNarrower = path.length && !utils_1.isNarrower(ast.span, path[path.length - 1].span);
if (!isNotNarrower) {
path.push(ast);
}
ast.visit(this);
}
};
return class_1;
}(compiler_1.RecursiveAstVisitor));
// We never care about the ASTWithSource node and its visit() method calls its ast's visit so
// the visit() method above would never see it.
if (ast instanceof compiler_1.ASTWithSource) {
ast = ast.ast;
}
// `Interpolation` is useless here except the `expressions` of it.
if (ast instanceof compiler_1.Interpolation) {
ast = ast.expressions.filter(function (_ast) { return utils_1.inSpan(position, _ast.sourceSpan); })[0];
}
if (ast) {
visitor.visit(ast);
}
return new compiler_1.AstPath(path, position);
}
function getExpressionCompletions(scope, ast, position, templateInfo) {
var path = findAstAt(ast, position);
if (path.empty)
return undefined;
var tail = path.tail;
var result = scope;
function getType(ast) {
return new expression_type_1.AstType(scope, templateInfo.query, {}, templateInfo.source).getType(ast);
}
// If the completion request is in a not in a pipe or property access then the global scope
// (that is the scope of the implicit receiver) is the right scope as the user is typing the
// beginning of an expression.
tail.visit({
visitBinary: function (_ast) { },
visitChain: function (_ast) { },
visitConditional: function (_ast) { },
visitFunctionCall: function (_ast) { },
visitImplicitReceiver: function (_ast) { },
visitInterpolation: function (_ast) {
result = undefined;
},
visitKeyedRead: function (_ast) { },
visitKeyedWrite: function (_ast) { },
visitLiteralArray: function (_ast) { },
visitLiteralMap: function (_ast) { },
visitLiteralPrimitive: function (ast) {
// The type `LiteralPrimitive` include the `ERROR`, and it's wrapped as `string`.
// packages/compiler/src/template_parser/binding_parser.ts#L308
// So exclude the `ERROR` here.
if (typeof ast.value === 'string' &&
ast.value ===
templateInfo.source.slice(ast.sourceSpan.start + 1, ast.sourceSpan.end - 1)) {
result = undefined;
}
},
visitMethodCall: function (_ast) { },
visitPipe: function (ast) {
if (position >= ast.exp.span.end &&
(!ast.args || !ast.args.length || position < ast.args[0].span.start)) {
// We are in a position a pipe name is expected.
result = templateInfo.query.getPipes();
}
},
visitPrefixNot: function (_ast) { },
visitNonNullAssert: function (_ast) { },
visitPropertyRead: function (ast) {
var receiverType = getType(ast.receiver);
result = receiverType ? receiverType.members() : scope;
},
visitPropertyWrite: function (ast) {
var receiverType = getType(ast.receiver);
result = receiverType ? receiverType.members() : scope;
},
visitQuote: function (_ast) {
// For a quote, return the members of any (if there are any).
result = templateInfo.query.getBuiltinType(types_1.BuiltinType.Any).members();
},
visitSafeMethodCall: function (ast) {
var receiverType = getType(ast.receiver);
result = receiverType ? receiverType.members() : scope;
},
visitSafePropertyRead: function (ast) {
var receiverType = getType(ast.receiver);
result = receiverType ? receiverType.members() : scope;
},
});
return result && result.values();
}
exports.getExpressionCompletions = getExpressionCompletions;
/**
* Retrieves the expression symbol at a particular position in a template.
*
* @param scope symbols in scope of the template
* @param ast template AST
* @param position absolute location in template to retrieve symbol at
* @param query type symbol query for the template scope
*/
function getExpressionSymbol(scope, ast, position, templateInfo) {
var path = findAstAt(ast, position, /* excludeEmpty */ true);
if (path.empty)
return undefined;
var tail = path.tail;
function getType(ast) {
return new expression_type_1.AstType(scope, templateInfo.query, {}, templateInfo.source).getType(ast);
}
function spanFromName(ast) {
// `nameSpan` is an absolute span, but the span expected by the result of this method is
// relative to the start of the expression.
// TODO(ayazhafiz): migrate to only using absolute spans
var offset = ast.sourceSpan.start - ast.span.start;
return {
start: ast.nameSpan.start - offset,
end: ast.nameSpan.end - offset,
};
}
var symbol = undefined;
var span = undefined;
// If the completion request is in a not in a pipe or property access then the global scope
// (that is the scope of the implicit receiver) is the right scope as the user is typing the
// beginning of an expression.
tail.visit({
visitBinary: function (_ast) { },
visitChain: function (_ast) { },
visitConditional: function (_ast) { },
visitFunctionCall: function (_ast) { },
visitImplicitReceiver: function (_ast) { },
visitInterpolation: function (_ast) { },
visitKeyedRead: function (_ast) { },
visitKeyedWrite: function (_ast) { },
visitLiteralArray: function (_ast) { },
visitLiteralMap: function (_ast) { },
visitLiteralPrimitive: function (_ast) { },
visitMethodCall: function (ast) {
var receiverType = getType(ast.receiver);
symbol = receiverType && receiverType.members().get(ast.name);
span = spanFromName(ast);
},
visitPipe: function (ast) {
if (utils_1.inSpan(position, ast.nameSpan, /* exclusive */ true)) {
// We are in a position a pipe name is expected.
var pipes = templateInfo.query.getPipes();
symbol = pipes.get(ast.name);
span = spanFromName(ast);
}
},
visitPrefixNot: function (_ast) { },
visitNonNullAssert: function (_ast) { },
visitPropertyRead: function (ast) {
var receiverType = getType(ast.receiver);
symbol = receiverType && receiverType.members().get(ast.name);
span = spanFromName(ast);
},
visitPropertyWrite: function (ast) {
var receiverType = getType(ast.receiver);
symbol = receiverType && receiverType.members().get(ast.name);
span = spanFromName(ast);
},
visitQuote: function (_ast) { },
visitSafeMethodCall: function (ast) {
var receiverType = getType(ast.receiver);
symbol = receiverType && receiverType.members().get(ast.name);
span = spanFromName(ast);
},
visitSafePropertyRead: function (ast) {
var receiverType = getType(ast.receiver);
symbol = receiverType && receiverType.members().get(ast.name);
span = spanFromName(ast);
},
});
if (symbol && span) {
return { symbol: symbol, span: span };
}
}
exports.getExpressionSymbol = getExpressionSymbol;
});
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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 {AST, AstPath as AstPathBase, ASTWithName, ASTWithSource, Interpolation, RecursiveAstVisitor} from '@angular/compiler';\n\nimport {AstType} from './expression_type';\nimport {BuiltinType, Span, Symbol, SymbolTable, TemplateSource} from './types';\nimport {inSpan, isNarrower} from './utils';\n\ntype AstPath = AstPathBase<AST>;\n\nfunction findAstAt(ast: AST, position: number, excludeEmpty: boolean = false): AstPath {\n  const path: AST[] = [];\n  const visitor = new class extends RecursiveAstVisitor {\n    visit(ast: AST) {\n      if ((!excludeEmpty || ast.sourceSpan.start < ast.sourceSpan.end) &&\n          inSpan(position, ast.sourceSpan)) {\n        const isNotNarrower = path.length && !isNarrower(ast.span, path[path.length - 1].span);\n        if (!isNotNarrower) {\n          path.push(ast);\n        }\n        ast.visit(this);\n      }\n    }\n  };\n\n  // We never care about the ASTWithSource node and its visit() method calls its ast's visit so\n  // the visit() method above would never see it.\n  if (ast instanceof ASTWithSource) {\n    ast = ast.ast;\n  }\n\n  // `Interpolation` is useless here except the `expressions` of it.\n  if (ast instanceof Interpolation) {\n    ast = ast.expressions.filter((_ast: AST) => inSpan(position, _ast.sourceSpan))[0];\n  }\n\n  if (ast) {\n    visitor.visit(ast);\n  }\n\n  return new AstPathBase<AST>(path, position);\n}\n\nexport function getExpressionCompletions(\n    scope: SymbolTable, ast: AST, position: number, templateInfo: TemplateSource): Symbol[]|\n    undefined {\n  const path = findAstAt(ast, position);\n  if (path.empty) return undefined;\n  const tail = path.tail!;\n  let result: SymbolTable|undefined = scope;\n\n  function getType(ast: AST): Symbol {\n    return new AstType(scope, templateInfo.query, {}, templateInfo.source).getType(ast);\n  }\n\n  // If the completion request is in a not in a pipe or property access then the global scope\n  // (that is the scope of the implicit receiver) is the right scope as the user is typing the\n  // beginning of an expression.\n  tail.visit({\n    visitBinary(_ast) {},\n    visitChain(_ast) {},\n    visitConditional(_ast) {},\n    visitFunctionCall(_ast) {},\n    visitImplicitReceiver(_ast) {},\n    visitInterpolation(_ast) {\n      result = undefined;\n    },\n    visitKeyedRead(_ast) {},\n    visitKeyedWrite(_ast) {},\n    visitLiteralArray(_ast) {},\n    visitLiteralMap(_ast) {},\n    visitLiteralPrimitive(ast) {\n      // The type `LiteralPrimitive` include the `ERROR`, and it's wrapped as `string`.\n      // packages/compiler/src/template_parser/binding_parser.ts#L308\n      // So exclude the `ERROR` here.\n      if (typeof ast.value === 'string' &&\n          ast.value ===\n              templateInfo.source.slice(ast.sourceSpan.start + 1, ast.sourceSpan.end - 1)) {\n        result = undefined;\n      }\n    },\n    visitMethodCall(_ast) {},\n    visitPipe(ast) {\n      if (position >= ast.exp.span.end &&\n          (!ast.args || !ast.args.length || position < (<AST>ast.args[0]).span.start)) {\n        // We are in a position a pipe name is expected.\n        result = templateInfo.query.getPipes();\n      }\n    },\n    visitPrefixNot(_ast) {},\n    visitNonNullAssert(_ast) {},\n    visitPropertyRead(ast) {\n      const receiverType = getType(ast.receiver);\n      result = receiverType ? receiverType.members() : scope;\n    },\n    visitPropertyWrite(ast) {\n      const receiverType = getType(ast.receiver);\n      result = receiverType ? receiverType.members() : scope;\n    },\n    visitQuote(_ast) {\n      // For a quote, return the members of any (if there are any).\n      result = templateInfo.query.getBuiltinType(BuiltinType.Any).members();\n    },\n    visitSafeMethodCall(ast) {\n      const receiverType = getType(ast.receiver);\n      result = receiverType ? receiverType.members() : scope;\n    },\n    visitSafePropertyRead(ast) {\n      const receiverType = getType(ast.receiver);\n      result = receiverType ? receiverType.members() : scope;\n    },\n  });\n\n  return result && result.values();\n}\n\n/**\n * Retrieves the expression symbol at a particular position in a template.\n *\n * @param scope symbols in scope of the template\n * @param ast template AST\n * @param position absolute location in template to retrieve symbol at\n * @param query type symbol query for the template scope\n */\nexport function getExpressionSymbol(\n    scope: SymbolTable, ast: AST, position: number,\n    templateInfo: TemplateSource): {symbol: Symbol, span: Span}|undefined {\n  const path = findAstAt(ast, position, /* excludeEmpty */ true);\n  if (path.empty) return undefined;\n  const tail = path.tail!;\n\n  function getType(ast: AST): Symbol {\n    return new AstType(scope, templateInfo.query, {}, templateInfo.source).getType(ast);\n  }\n\n  function spanFromName(ast: ASTWithName): Span {\n    // `nameSpan` is an absolute span, but the span expected by the result of this method is\n    // relative to the start of the expression.\n    // TODO(ayazhafiz): migrate to only using absolute spans\n    const offset = ast.sourceSpan.start - ast.span.start;\n    return {\n      start: ast.nameSpan.start - offset,\n      end: ast.nameSpan.end - offset,\n    };\n  }\n\n  let symbol: Symbol|undefined = undefined;\n  let span: Span|undefined = undefined;\n\n  // If the completion request is in a not in a pipe or property access then the global scope\n  // (that is the scope of the implicit receiver) is the right scope as the user is typing the\n  // beginning of an expression.\n  tail.visit({\n    visitBinary(_ast) {},\n    visitChain(_ast) {},\n    visitConditional(_ast) {},\n    visitFunctionCall(_ast) {},\n    visitImplicitReceiver(_ast) {},\n    visitInterpolation(_ast) {},\n    visitKeyedRead(_ast) {},\n    visitKeyedWrite(_ast) {},\n    visitLiteralArray(_ast) {},\n    visitLiteralMap(_ast) {},\n    visitLiteralPrimitive(_ast) {},\n    visitMethodCall(ast) {\n      const receiverType = getType(ast.receiver);\n      symbol = receiverType && receiverType.members().get(ast.name);\n      span = spanFromName(ast);\n    },\n    visitPipe(ast) {\n      if (inSpan(position, ast.nameSpan, /* exclusive */ true)) {\n        // We are in a position a pipe name is expected.\n        const pipes = templateInfo.query.getPipes();\n        symbol = pipes.get(ast.name);\n        span = spanFromName(ast);\n      }\n    },\n    visitPrefixNot(_ast) {},\n    visitNonNullAssert(_ast) {},\n    visitPropertyRead(ast) {\n      const receiverType = getType(ast.receiver);\n      symbol = receiverType && receiverType.members().get(ast.name);\n      span = spanFromName(ast);\n    },\n    visitPropertyWrite(ast) {\n      const receiverType = getType(ast.receiver);\n      symbol = receiverType && receiverType.members().get(ast.name);\n      span = spanFromName(ast);\n    },\n    visitQuote(_ast) {},\n    visitSafeMethodCall(ast) {\n      const receiverType = getType(ast.receiver);\n      symbol = receiverType && receiverType.members().get(ast.name);\n      span = spanFromName(ast);\n    },\n    visitSafePropertyRead(ast) {\n      const receiverType = getType(ast.receiver);\n      symbol = receiverType && receiverType.members().get(ast.name);\n      span = spanFromName(ast);\n    },\n  });\n\n  if (symbol && span) {\n    return {symbol, span};\n  }\n}\n"]}