@angular/compiler
Version:
Angular - the compiler library
233 lines • 30 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/compiler/src/render3/view/util", ["require", "exports", "tslib", "@angular/compiler/src/output/output_ast", "@angular/compiler/src/util", "@angular/compiler/src/render3/r3_ast", "@angular/compiler/src/render3/view/i18n/util"], factory);
}
})(function (require, exports) {
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.getInterpolationArgsLength = exports.chainedInstruction = exports.getAttrsForDirectiveMatching = exports.DefinitionMap = exports.getQueryPredicate = exports.trimTrailingNulls = exports.conditionallyCreateMapObjectLiteral = exports.asLiteral = exports.invalid = exports.unsupported = exports.temporaryAllocator = exports.RESTORED_VIEW_CONTEXT_NAME = exports.NON_BINDABLE_ATTR = exports.IMPLICIT_REFERENCE = exports.REFERENCE_PREFIX = exports.RENDER_FLAGS = exports.CONTEXT_NAME = exports.TEMPORARY_NAME = void 0;
var tslib_1 = require("tslib");
var o = require("@angular/compiler/src/output/output_ast");
var util_1 = require("@angular/compiler/src/util");
var t = require("@angular/compiler/src/render3/r3_ast");
var util_2 = require("@angular/compiler/src/render3/view/i18n/util");
/**
* Checks whether an object key contains potentially unsafe chars, thus the key should be wrapped in
* quotes. Note: we do not wrap all keys into quotes, as it may have impact on minification and may
* bot work in some cases when object keys are mangled by minifier.
*
* TODO(FW-1136): this is a temporary solution, we need to come up with a better way of working with
* inputs that contain potentially unsafe chars.
*/
var UNSAFE_OBJECT_KEY_NAME_REGEXP = /[-.]/;
/** Name of the temporary to use during data binding */
exports.TEMPORARY_NAME = '_t';
/** Name of the context parameter passed into a template function */
exports.CONTEXT_NAME = 'ctx';
/** Name of the RenderFlag passed into a template function */
exports.RENDER_FLAGS = 'rf';
/** The prefix reference variables */
exports.REFERENCE_PREFIX = '_r';
/** The name of the implicit context reference */
exports.IMPLICIT_REFERENCE = '$implicit';
/** Non bindable attribute name **/
exports.NON_BINDABLE_ATTR = 'ngNonBindable';
/** Name for the variable keeping track of the context returned by `ɵɵrestoreView`. */
exports.RESTORED_VIEW_CONTEXT_NAME = 'restoredCtx';
/**
* Creates an allocator for a temporary variable.
*
* A variable declaration is added to the statements the first time the allocator is invoked.
*/
function temporaryAllocator(statements, name) {
var temp = null;
return function () {
if (!temp) {
statements.push(new o.DeclareVarStmt(exports.TEMPORARY_NAME, undefined, o.DYNAMIC_TYPE));
temp = o.variable(name);
}
return temp;
};
}
exports.temporaryAllocator = temporaryAllocator;
function unsupported(feature) {
if (this) {
throw new Error("Builder " + this.constructor.name + " doesn't support " + feature + " yet");
}
throw new Error("Feature " + feature + " is not supported yet");
}
exports.unsupported = unsupported;
function invalid(arg) {
throw new Error("Invalid state: Visitor " + this.constructor.name + " doesn't handle " + arg.constructor.name);
}
exports.invalid = invalid;
function asLiteral(value) {
if (Array.isArray(value)) {
return o.literalArr(value.map(asLiteral));
}
return o.literal(value, o.INFERRED_TYPE);
}
exports.asLiteral = asLiteral;
function conditionallyCreateMapObjectLiteral(keys, keepDeclared) {
if (Object.getOwnPropertyNames(keys).length > 0) {
return mapToExpression(keys, keepDeclared);
}
return null;
}
exports.conditionallyCreateMapObjectLiteral = conditionallyCreateMapObjectLiteral;
function mapToExpression(map, keepDeclared) {
return o.literalMap(Object.getOwnPropertyNames(map).map(function (key) {
var _a, _b;
// canonical syntax: `dirProp: publicProp`
// if there is no `:`, use dirProp = elProp
var value = map[key];
var declaredName;
var publicName;
var minifiedName;
var needsDeclaredName;
if (Array.isArray(value)) {
_a = tslib_1.__read(value, 2), publicName = _a[0], declaredName = _a[1];
minifiedName = key;
needsDeclaredName = publicName !== declaredName;
}
else {
_b = tslib_1.__read(util_1.splitAtColon(key, [key, value]), 2), declaredName = _b[0], publicName = _b[1];
minifiedName = declaredName;
// Only include the declared name if extracted from the key, i.e. the key contains a colon.
// Otherwise the declared name should be omitted even if it is different from the public name,
// as it may have already been minified.
needsDeclaredName = publicName !== declaredName && key.includes(':');
}
return {
key: minifiedName,
// put quotes around keys that contain potentially unsafe characters
quoted: UNSAFE_OBJECT_KEY_NAME_REGEXP.test(minifiedName),
value: (keepDeclared && needsDeclaredName) ?
o.literalArr([asLiteral(publicName), asLiteral(declaredName)]) :
asLiteral(publicName)
};
}));
}
/**
* Remove trailing null nodes as they are implied.
*/
function trimTrailingNulls(parameters) {
while (o.isNull(parameters[parameters.length - 1])) {
parameters.pop();
}
return parameters;
}
exports.trimTrailingNulls = trimTrailingNulls;
function getQueryPredicate(query, constantPool) {
if (Array.isArray(query.predicate)) {
var predicate_1 = [];
query.predicate.forEach(function (selector) {
// Each item in predicates array may contain strings with comma-separated refs
// (for ex. 'ref, ref1, ..., refN'), thus we extract individual refs and store them
// as separate array entities
var selectors = selector.split(',').map(function (token) { return o.literal(token.trim()); });
predicate_1.push.apply(predicate_1, tslib_1.__spreadArray([], tslib_1.__read(selectors)));
});
return constantPool.getConstLiteral(o.literalArr(predicate_1), true);
}
else {
return query.predicate;
}
}
exports.getQueryPredicate = getQueryPredicate;
/**
* A representation for an object literal used during codegen of definition objects. The generic
* type `T` allows to reference a documented type of the generated structure, such that the
* property names that are set can be resolved to their documented declaration.
*/
var DefinitionMap = /** @class */ (function () {
function DefinitionMap() {
this.values = [];
}
DefinitionMap.prototype.set = function (key, value) {
if (value) {
this.values.push({ key: key, value: value, quoted: false });
}
};
DefinitionMap.prototype.toLiteralMap = function () {
return o.literalMap(this.values);
};
return DefinitionMap;
}());
exports.DefinitionMap = DefinitionMap;
/**
* Extract a map of properties to values for a given element or template node, which can be used
* by the directive matching machinery.
*
* @param elOrTpl the element or template in question
* @return an object set up for directive matching. For attributes on the element/template, this
* object maps a property name to its (static) value. For any bindings, this map simply maps the
* property name to an empty string.
*/
function getAttrsForDirectiveMatching(elOrTpl) {
var attributesMap = {};
if (elOrTpl instanceof t.Template && elOrTpl.tagName !== 'ng-template') {
elOrTpl.templateAttrs.forEach(function (a) { return attributesMap[a.name] = ''; });
}
else {
elOrTpl.attributes.forEach(function (a) {
if (!util_2.isI18nAttribute(a.name)) {
attributesMap[a.name] = a.value;
}
});
elOrTpl.inputs.forEach(function (i) {
attributesMap[i.name] = '';
});
elOrTpl.outputs.forEach(function (o) {
attributesMap[o.name] = '';
});
}
return attributesMap;
}
exports.getAttrsForDirectiveMatching = getAttrsForDirectiveMatching;
/** Returns a call expression to a chained instruction, e.g. `property(params[0])(params[1])`. */
function chainedInstruction(reference, calls, span) {
var expression = o.importExpr(reference, null, span);
if (calls.length > 0) {
for (var i = 0; i < calls.length; i++) {
expression = expression.callFn(calls[i], span);
}
}
else {
// Add a blank invocation, in case the `calls` array is empty.
expression = expression.callFn([], span);
}
return expression;
}
exports.chainedInstruction = chainedInstruction;
/**
* Gets the number of arguments expected to be passed to a generated instruction in the case of
* interpolation instructions.
* @param interpolation An interpolation ast
*/
function getInterpolationArgsLength(interpolation) {
var expressions = interpolation.expressions, strings = interpolation.strings;
if (expressions.length === 1 && strings.length === 2 && strings[0] === '' && strings[1] === '') {
// If the interpolation has one interpolated value, but the prefix and suffix are both empty
// strings, we only pass one argument, to a special instruction like `propertyInterpolate` or
// `textInterpolate`.
return 1;
}
else {
return expressions.length + strings.length;
}
}
exports.getInterpolationArgsLength = getInterpolationArgsLength;
});
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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 {ConstantPool} from '../../constant_pool';\nimport {Interpolation} from '../../expression_parser/ast';\nimport * as o from '../../output/output_ast';\nimport {ParseSourceSpan} from '../../parse_util';\nimport {splitAtColon} from '../../util';\nimport * as t from '../r3_ast';\n\nimport {R3QueryMetadata} from './api';\nimport {isI18nAttribute} from './i18n/util';\n\n\n/**\n * Checks whether an object key contains potentially unsafe chars, thus the key should be wrapped in\n * quotes. Note: we do not wrap all keys into quotes, as it may have impact on minification and may\n * bot work in some cases when object keys are mangled by minifier.\n *\n * TODO(FW-1136): this is a temporary solution, we need to come up with a better way of working with\n * inputs that contain potentially unsafe chars.\n */\nconst UNSAFE_OBJECT_KEY_NAME_REGEXP = /[-.]/;\n\n/** Name of the temporary to use during data binding */\nexport const TEMPORARY_NAME = '_t';\n\n/** Name of the context parameter passed into a template function */\nexport const CONTEXT_NAME = 'ctx';\n\n/** Name of the RenderFlag passed into a template function */\nexport const RENDER_FLAGS = 'rf';\n\n/** The prefix reference variables */\nexport const REFERENCE_PREFIX = '_r';\n\n/** The name of the implicit context reference */\nexport const IMPLICIT_REFERENCE = '$implicit';\n\n/** Non bindable attribute name **/\nexport const NON_BINDABLE_ATTR = 'ngNonBindable';\n\n/** Name for the variable keeping track of the context returned by `ɵɵrestoreView`. */\nexport const RESTORED_VIEW_CONTEXT_NAME = 'restoredCtx';\n\n/**\n * Creates an allocator for a temporary variable.\n *\n * A variable declaration is added to the statements the first time the allocator is invoked.\n */\nexport function temporaryAllocator(statements: o.Statement[], name: string): () => o.ReadVarExpr {\n  let temp: o.ReadVarExpr|null = null;\n  return () => {\n    if (!temp) {\n      statements.push(new o.DeclareVarStmt(TEMPORARY_NAME, undefined, o.DYNAMIC_TYPE));\n      temp = o.variable(name);\n    }\n    return temp;\n  };\n}\n\n\nexport function unsupported(this: void|Function, feature: string): never {\n  if (this) {\n    throw new Error(`Builder ${this.constructor.name} doesn't support ${feature} yet`);\n  }\n  throw new Error(`Feature ${feature} is not supported yet`);\n}\n\nexport function invalid<T>(this: t.Visitor, arg: o.Expression|o.Statement|t.Node): never {\n  throw new Error(\n      `Invalid state: Visitor ${this.constructor.name} doesn't handle ${arg.constructor.name}`);\n}\n\nexport function asLiteral(value: any): o.Expression {\n  if (Array.isArray(value)) {\n    return o.literalArr(value.map(asLiteral));\n  }\n  return o.literal(value, o.INFERRED_TYPE);\n}\n\nexport function conditionallyCreateMapObjectLiteral(\n    keys: {[key: string]: string|string[]}, keepDeclared?: boolean): o.Expression|null {\n  if (Object.getOwnPropertyNames(keys).length > 0) {\n    return mapToExpression(keys, keepDeclared);\n  }\n  return null;\n}\n\nfunction mapToExpression(\n    map: {[key: string]: string|string[]}, keepDeclared?: boolean): o.Expression {\n  return o.literalMap(Object.getOwnPropertyNames(map).map(key => {\n    // canonical syntax: `dirProp: publicProp`\n    // if there is no `:`, use dirProp = elProp\n    const value = map[key];\n    let declaredName: string;\n    let publicName: string;\n    let minifiedName: string;\n    let needsDeclaredName: boolean;\n    if (Array.isArray(value)) {\n      [publicName, declaredName] = value;\n      minifiedName = key;\n      needsDeclaredName = publicName !== declaredName;\n    } else {\n      [declaredName, publicName] = splitAtColon(key, [key, value]);\n      minifiedName = declaredName;\n      // Only include the declared name if extracted from the key, i.e. the key contains a colon.\n      // Otherwise the declared name should be omitted even if it is different from the public name,\n      // as it may have already been minified.\n      needsDeclaredName = publicName !== declaredName && key.includes(':');\n    }\n    return {\n      key: minifiedName,\n      // put quotes around keys that contain potentially unsafe characters\n      quoted: UNSAFE_OBJECT_KEY_NAME_REGEXP.test(minifiedName),\n      value: (keepDeclared && needsDeclaredName) ?\n          o.literalArr([asLiteral(publicName), asLiteral(declaredName)]) :\n          asLiteral(publicName)\n    };\n  }));\n}\n\n/**\n *  Remove trailing null nodes as they are implied.\n */\nexport function trimTrailingNulls(parameters: o.Expression[]): o.Expression[] {\n  while (o.isNull(parameters[parameters.length - 1])) {\n    parameters.pop();\n  }\n  return parameters;\n}\n\nexport function getQueryPredicate(\n    query: R3QueryMetadata, constantPool: ConstantPool): o.Expression {\n  if (Array.isArray(query.predicate)) {\n    let predicate: o.Expression[] = [];\n    query.predicate.forEach((selector: string): void => {\n      // Each item in predicates array may contain strings with comma-separated refs\n      // (for ex. 'ref, ref1, ..., refN'), thus we extract individual refs and store them\n      // as separate array entities\n      const selectors = selector.split(',').map(token => o.literal(token.trim()));\n      predicate.push(...selectors);\n    });\n    return constantPool.getConstLiteral(o.literalArr(predicate), true);\n  } else {\n    return query.predicate;\n  }\n}\n\n/**\n * A representation for an object literal used during codegen of definition objects. The generic\n * type `T` allows to reference a documented type of the generated structure, such that the\n * property names that are set can be resolved to their documented declaration.\n */\nexport class DefinitionMap<T = any> {\n  values: {key: string, quoted: boolean, value: o.Expression}[] = [];\n\n  set(key: keyof T, value: o.Expression|null): void {\n    if (value) {\n      this.values.push({key: key as string, value, quoted: false});\n    }\n  }\n\n  toLiteralMap(): o.LiteralMapExpr {\n    return o.literalMap(this.values);\n  }\n}\n\n/**\n * Extract a map of properties to values for a given element or template node, which can be used\n * by the directive matching machinery.\n *\n * @param elOrTpl the element or template in question\n * @return an object set up for directive matching. For attributes on the element/template, this\n * object maps a property name to its (static) value. For any bindings, this map simply maps the\n * property name to an empty string.\n */\nexport function getAttrsForDirectiveMatching(elOrTpl: t.Element|\n                                             t.Template): {[name: string]: string} {\n  const attributesMap: {[name: string]: string} = {};\n\n\n  if (elOrTpl instanceof t.Template && elOrTpl.tagName !== 'ng-template') {\n    elOrTpl.templateAttrs.forEach(a => attributesMap[a.name] = '');\n  } else {\n    elOrTpl.attributes.forEach(a => {\n      if (!isI18nAttribute(a.name)) {\n        attributesMap[a.name] = a.value;\n      }\n    });\n\n    elOrTpl.inputs.forEach(i => {\n      attributesMap[i.name] = '';\n    });\n    elOrTpl.outputs.forEach(o => {\n      attributesMap[o.name] = '';\n    });\n  }\n\n  return attributesMap;\n}\n\n/** Returns a call expression to a chained instruction, e.g. `property(params[0])(params[1])`. */\nexport function chainedInstruction(\n    reference: o.ExternalReference, calls: o.Expression[][], span?: ParseSourceSpan|null) {\n  let expression = o.importExpr(reference, null, span) as o.Expression;\n\n  if (calls.length > 0) {\n    for (let i = 0; i < calls.length; i++) {\n      expression = expression.callFn(calls[i], span);\n    }\n  } else {\n    // Add a blank invocation, in case the `calls` array is empty.\n    expression = expression.callFn([], span);\n  }\n\n  return expression;\n}\n\n/**\n * Gets the number of arguments expected to be passed to a generated instruction in the case of\n * interpolation instructions.\n * @param interpolation An interpolation ast\n */\nexport function getInterpolationArgsLength(interpolation: Interpolation) {\n  const {expressions, strings} = interpolation;\n  if (expressions.length === 1 && strings.length === 2 && strings[0] === '' && strings[1] === '') {\n    // If the interpolation has one interpolated value, but the prefix and suffix are both empty\n    // strings, we only pass one argument, to a special instruction like `propertyInterpolate` or\n    // `textInterpolate`.\n    return 1;\n  } else {\n    return expressions.length + strings.length;\n  }\n}\n"]}