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@angular/compiler

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Angular - the compiler library

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/** * @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 */ /** * This is an R3 `Node`-like wrapper for a raw `html.Comment` node. We do not currently * require the implementation of a visitor for Comments as they are only collected at * the top-level of the R3 AST, and only if `Render3ParseOptions['collectCommentNodes']` * is true. */ export class Comment { constructor(value, sourceSpan) { this.value = value; this.sourceSpan = sourceSpan; } visit(_visitor) { throw new Error('visit() not implemented for Comment'); } } export class Text { constructor(value, sourceSpan) { this.value = value; this.sourceSpan = sourceSpan; } visit(visitor) { return visitor.visitText(this); } } export class BoundText { constructor(value, sourceSpan, i18n) { this.value = value; this.sourceSpan = sourceSpan; this.i18n = i18n; } visit(visitor) { return visitor.visitBoundText(this); } } /** * Represents a text attribute in the template. * * `valueSpan` may not be present in cases where there is no value `<div a></div>`. * `keySpan` may also not be present for synthetic attributes from ICU expansions. */ export class TextAttribute { constructor(name, value, sourceSpan, keySpan, valueSpan, i18n) { this.name = name; this.value = value; this.sourceSpan = sourceSpan; this.keySpan = keySpan; this.valueSpan = valueSpan; this.i18n = i18n; } visit(visitor) { return visitor.visitTextAttribute(this); } } export class BoundAttribute { constructor(name, type, securityContext, value, unit, sourceSpan, keySpan, valueSpan, i18n) { this.name = name; this.type = type; this.securityContext = securityContext; this.value = value; this.unit = unit; this.sourceSpan = sourceSpan; this.keySpan = keySpan; this.valueSpan = valueSpan; this.i18n = i18n; } static fromBoundElementProperty(prop, i18n) { if (prop.keySpan === undefined) { throw new Error(`Unexpected state: keySpan must be defined for bound attributes but was not for ${prop.name}: ${prop.sourceSpan}`); } return new BoundAttribute(prop.name, prop.type, prop.securityContext, prop.value, prop.unit, prop.sourceSpan, prop.keySpan, prop.valueSpan, i18n); } visit(visitor) { return visitor.visitBoundAttribute(this); } } export class BoundEvent { constructor(name, type, handler, target, phase, sourceSpan, handlerSpan, keySpan) { this.name = name; this.type = type; this.handler = handler; this.target = target; this.phase = phase; this.sourceSpan = sourceSpan; this.handlerSpan = handlerSpan; this.keySpan = keySpan; } static fromParsedEvent(event) { const target = event.type === 0 /* Regular */ ? event.targetOrPhase : null; const phase = event.type === 1 /* Animation */ ? event.targetOrPhase : null; if (event.keySpan === undefined) { throw new Error(`Unexpected state: keySpan must be defined for bound event but was not for ${event.name}: ${event.sourceSpan}`); } return new BoundEvent(event.name, event.type, event.handler, target, phase, event.sourceSpan, event.handlerSpan, event.keySpan); } visit(visitor) { return visitor.visitBoundEvent(this); } } export class Element { constructor(name, attributes, inputs, outputs, children, references, sourceSpan, startSourceSpan, endSourceSpan, i18n) { this.name = name; this.attributes = attributes; this.inputs = inputs; this.outputs = outputs; this.children = children; this.references = references; this.sourceSpan = sourceSpan; this.startSourceSpan = startSourceSpan; this.endSourceSpan = endSourceSpan; this.i18n = i18n; } visit(visitor) { return visitor.visitElement(this); } } export class Template { constructor(tagName, attributes, inputs, outputs, templateAttrs, children, references, variables, sourceSpan, startSourceSpan, endSourceSpan, i18n) { this.tagName = tagName; this.attributes = attributes; this.inputs = inputs; this.outputs = outputs; this.templateAttrs = templateAttrs; this.children = children; this.references = references; this.variables = variables; this.sourceSpan = sourceSpan; this.startSourceSpan = startSourceSpan; this.endSourceSpan = endSourceSpan; this.i18n = i18n; } visit(visitor) { return visitor.visitTemplate(this); } } export class Content { constructor(selector, attributes, sourceSpan, i18n) { this.selector = selector; this.attributes = attributes; this.sourceSpan = sourceSpan; this.i18n = i18n; this.name = 'ng-content'; } visit(visitor) { return visitor.visitContent(this); } } export class Variable { constructor(name, value, sourceSpan, keySpan, valueSpan) { this.name = name; this.value = value; this.sourceSpan = sourceSpan; this.keySpan = keySpan; this.valueSpan = valueSpan; } visit(visitor) { return visitor.visitVariable(this); } } export class Reference { constructor(name, value, sourceSpan, keySpan, valueSpan) { this.name = name; this.value = value; this.sourceSpan = sourceSpan; this.keySpan = keySpan; this.valueSpan = valueSpan; } visit(visitor) { return visitor.visitReference(this); } } export class Icu { constructor(vars, placeholders, sourceSpan, i18n) { this.vars = vars; this.placeholders = placeholders; this.sourceSpan = sourceSpan; this.i18n = i18n; } visit(visitor) { return visitor.visitIcu(this); } } export class NullVisitor { visitElement(element) { } visitTemplate(template) { } visitContent(content) { } visitVariable(variable) { } visitReference(reference) { } visitTextAttribute(attribute) { } visitBoundAttribute(attribute) { } visitBoundEvent(attribute) { } visitText(text) { } visitBoundText(text) { } visitIcu(icu) { } } export class RecursiveVisitor { visitElement(element) { visitAll(this, element.attributes); visitAll(this, element.inputs); visitAll(this, element.outputs); visitAll(this, element.children); visitAll(this, element.references); } visitTemplate(template) { visitAll(this, template.attributes); visitAll(this, template.inputs); visitAll(this, template.outputs); visitAll(this, template.children); visitAll(this, template.references); visitAll(this, template.variables); } visitContent(content) { } visitVariable(variable) { } visitReference(reference) { } visitTextAttribute(attribute) { } visitBoundAttribute(attribute) { } visitBoundEvent(attribute) { } visitText(text) { } visitBoundText(text) { } visitIcu(icu) { } } export class TransformVisitor { visitElement(element) { const newAttributes = transformAll(this, element.attributes); const newInputs = transformAll(this, element.inputs); const newOutputs = transformAll(this, element.outputs); const newChildren = transformAll(this, element.children); const newReferences = transformAll(this, element.references); if (newAttributes != element.attributes || newInputs != element.inputs || newOutputs != element.outputs || newChildren != element.children || newReferences != element.references) { return new Element(element.name, newAttributes, newInputs, newOutputs, newChildren, newReferences, element.sourceSpan, element.startSourceSpan, element.endSourceSpan); } return element; } visitTemplate(template) { const newAttributes = transformAll(this, template.attributes); const newInputs = transformAll(this, template.inputs); const newOutputs = transformAll(this, template.outputs); const newTemplateAttrs = transformAll(this, template.templateAttrs); const newChildren = transformAll(this, template.children); const newReferences = transformAll(this, template.references); const newVariables = transformAll(this, template.variables); if (newAttributes != template.attributes || newInputs != template.inputs || newOutputs != template.outputs || newTemplateAttrs != template.templateAttrs || newChildren != template.children || newReferences != template.references || newVariables != template.variables) { return new Template(template.tagName, newAttributes, newInputs, newOutputs, newTemplateAttrs, newChildren, newReferences, newVariables, template.sourceSpan, template.startSourceSpan, template.endSourceSpan); } return template; } visitContent(content) { return content; } visitVariable(variable) { return variable; } visitReference(reference) { return reference; } visitTextAttribute(attribute) { return attribute; } visitBoundAttribute(attribute) { return attribute; } visitBoundEvent(attribute) { return attribute; } visitText(text) { return text; } visitBoundText(text) { return text; } visitIcu(icu) { return icu; } } export function visitAll(visitor, nodes) { const result = []; if (visitor.visit) { for (const node of nodes) { const newNode = visitor.visit(node) || node.visit(visitor); } } else { for (const node of nodes) { const newNode = node.visit(visitor); if (newNode) { result.push(newNode); } } } return result; } export function transformAll(visitor, nodes) { const result = []; let changed = false; for (const node of nodes) { const newNode = node.visit(visitor); if (newNode) { result.push(newNode); } changed = changed || newNode != node; } return changed ? result : nodes; } //# 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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 {SecurityContext} from '../core';\nimport {AST, BindingType, BoundElementProperty, ParsedEvent, ParsedEventType} from '../expression_parser/ast';\nimport {I18nMeta} from '../i18n/i18n_ast';\nimport {ParseSourceSpan} from '../parse_util';\n\nexport interface Node {\n  sourceSpan: ParseSourceSpan;\n  visit<Result>(visitor: Visitor<Result>): Result;\n}\n\n/**\n * This is an R3 `Node`-like wrapper for a raw `html.Comment` node. We do not currently\n * require the implementation of a visitor for Comments as they are only collected at\n * the top-level of the R3 AST, and only if `Render3ParseOptions['collectCommentNodes']`\n * is true.\n */\nexport class Comment implements Node {\n  constructor(public value: string, public sourceSpan: ParseSourceSpan) {}\n  visit<Result>(_visitor: Visitor<Result>): Result {\n    throw new Error('visit() not implemented for Comment');\n  }\n}\n\nexport class Text implements Node {\n  constructor(public value: string, public sourceSpan: ParseSourceSpan) {}\n  visit<Result>(visitor: Visitor<Result>): Result {\n    return visitor.visitText(this);\n  }\n}\n\nexport class BoundText implements Node {\n  constructor(public value: AST, public sourceSpan: ParseSourceSpan, public i18n?: I18nMeta) {}\n  visit<Result>(visitor: Visitor<Result>): Result {\n    return visitor.visitBoundText(this);\n  }\n}\n\n/**\n * Represents a text attribute in the template.\n *\n * `valueSpan` may not be present in cases where there is no value `<div a></div>`.\n * `keySpan` may also not be present for synthetic attributes from ICU expansions.\n */\nexport class TextAttribute implements Node {\n  constructor(\n      public name: string, public value: string, public sourceSpan: ParseSourceSpan,\n      readonly keySpan: ParseSourceSpan|undefined, public valueSpan?: ParseSourceSpan,\n      public i18n?: I18nMeta) {}\n  visit<Result>(visitor: Visitor<Result>): Result {\n    return visitor.visitTextAttribute(this);\n  }\n}\n\nexport class BoundAttribute implements Node {\n  constructor(\n      public name: string, public type: BindingType, public securityContext: SecurityContext,\n      public value: AST, public unit: string|null, public sourceSpan: ParseSourceSpan,\n      readonly keySpan: ParseSourceSpan, public valueSpan: ParseSourceSpan|undefined,\n      public i18n: I18nMeta|undefined) {}\n\n  static fromBoundElementProperty(prop: BoundElementProperty, i18n?: I18nMeta): BoundAttribute {\n    if (prop.keySpan === undefined) {\n      throw new Error(\n          `Unexpected state: keySpan must be defined for bound attributes but was not for ${\n              prop.name}: ${prop.sourceSpan}`);\n    }\n    return new BoundAttribute(\n        prop.name, prop.type, prop.securityContext, prop.value, prop.unit, prop.sourceSpan,\n        prop.keySpan, prop.valueSpan, i18n);\n  }\n\n  visit<Result>(visitor: Visitor<Result>): Result {\n    return visitor.visitBoundAttribute(this);\n  }\n}\n\nexport class BoundEvent implements Node {\n  constructor(\n      public name: string, public type: ParsedEventType, public handler: AST,\n      public target: string|null, public phase: string|null, public sourceSpan: ParseSourceSpan,\n      public handlerSpan: ParseSourceSpan, readonly keySpan: ParseSourceSpan) {}\n\n  static fromParsedEvent(event: ParsedEvent) {\n    const target: string|null = event.type === ParsedEventType.Regular ? event.targetOrPhase : null;\n    const phase: string|null =\n        event.type === ParsedEventType.Animation ? event.targetOrPhase : null;\n    if (event.keySpan === undefined) {\n      throw new Error(`Unexpected state: keySpan must be defined for bound event but was not for ${\n          event.name}: ${event.sourceSpan}`);\n    }\n    return new BoundEvent(\n        event.name, event.type, event.handler, target, phase, event.sourceSpan, event.handlerSpan,\n        event.keySpan);\n  }\n\n  visit<Result>(visitor: Visitor<Result>): Result {\n    return visitor.visitBoundEvent(this);\n  }\n}\n\nexport class Element implements Node {\n  constructor(\n      public name: string, public attributes: TextAttribute[], public inputs: BoundAttribute[],\n      public outputs: BoundEvent[], public children: Node[], public references: Reference[],\n      public sourceSpan: ParseSourceSpan, public startSourceSpan: ParseSourceSpan,\n      public endSourceSpan: ParseSourceSpan|null, public i18n?: I18nMeta) {}\n  visit<Result>(visitor: Visitor<Result>): Result {\n    return visitor.visitElement(this);\n  }\n}\n\nexport class Template implements Node {\n  constructor(\n      public tagName: string, public attributes: TextAttribute[], public inputs: BoundAttribute[],\n      public outputs: BoundEvent[], public templateAttrs: (BoundAttribute|TextAttribute)[],\n      public children: Node[], public references: Reference[], public variables: Variable[],\n      public sourceSpan: ParseSourceSpan, public startSourceSpan: ParseSourceSpan,\n      public endSourceSpan: ParseSourceSpan|null, public i18n?: I18nMeta) {}\n  visit<Result>(visitor: Visitor<Result>): Result {\n    return visitor.visitTemplate(this);\n  }\n}\n\nexport class Content implements Node {\n  readonly name = 'ng-content';\n\n  constructor(\n      public selector: string, public attributes: TextAttribute[],\n      public sourceSpan: ParseSourceSpan, public i18n?: I18nMeta) {}\n  visit<Result>(visitor: Visitor<Result>): Result {\n    return visitor.visitContent(this);\n  }\n}\n\nexport class Variable implements Node {\n  constructor(\n      public name: string, public value: string, public sourceSpan: ParseSourceSpan,\n      readonly keySpan: ParseSourceSpan, public valueSpan?: ParseSourceSpan) {}\n  visit<Result>(visitor: Visitor<Result>): Result {\n    return visitor.visitVariable(this);\n  }\n}\n\nexport class Reference implements Node {\n  constructor(\n      public name: string, public value: string, public sourceSpan: ParseSourceSpan,\n      readonly keySpan: ParseSourceSpan, public valueSpan?: ParseSourceSpan) {}\n  visit<Result>(visitor: Visitor<Result>): Result {\n    return visitor.visitReference(this);\n  }\n}\n\nexport class Icu implements Node {\n  constructor(\n      public vars: {[name: string]: BoundText},\n      public placeholders: {[name: string]: Text|BoundText}, public sourceSpan: ParseSourceSpan,\n      public i18n?: I18nMeta) {}\n  visit<Result>(visitor: Visitor<Result>): Result {\n    return visitor.visitIcu(this);\n  }\n}\n\nexport interface Visitor<Result = any> {\n  // Returning a truthy value from `visit()` will prevent `visitAll()` from the call to the typed\n  // method and result returned will become the result included in `visitAll()`s result array.\n  visit?(node: Node): Result;\n\n  visitElement(element: Element): Result;\n  visitTemplate(template: Template): Result;\n  visitContent(content: Content): Result;\n  visitVariable(variable: Variable): Result;\n  visitReference(reference: Reference): Result;\n  visitTextAttribute(attribute: TextAttribute): Result;\n  visitBoundAttribute(attribute: BoundAttribute): Result;\n  visitBoundEvent(attribute: BoundEvent): Result;\n  visitText(text: Text): Result;\n  visitBoundText(text: BoundText): Result;\n  visitIcu(icu: Icu): Result;\n}\n\nexport class NullVisitor implements Visitor<void> {\n  visitElement(element: Element): void {}\n  visitTemplate(template: Template): void {}\n  visitContent(content: Content): void {}\n  visitVariable(variable: Variable): void {}\n  visitReference(reference: Reference): void {}\n  visitTextAttribute(attribute: TextAttribute): void {}\n  visitBoundAttribute(attribute: BoundAttribute): void {}\n  visitBoundEvent(attribute: BoundEvent): void {}\n  visitText(text: Text): void {}\n  visitBoundText(text: BoundText): void {}\n  visitIcu(icu: Icu): void {}\n}\n\nexport class RecursiveVisitor implements Visitor<void> {\n  visitElement(element: Element): void {\n    visitAll(this, element.attributes);\n    visitAll(this, element.inputs);\n    visitAll(this, element.outputs);\n    visitAll(this, element.children);\n    visitAll(this, element.references);\n  }\n  visitTemplate(template: Template): void {\n    visitAll(this, template.attributes);\n    visitAll(this, template.inputs);\n    visitAll(this, template.outputs);\n    visitAll(this, template.children);\n    visitAll(this, template.references);\n    visitAll(this, template.variables);\n  }\n  visitContent(content: Content): void {}\n  visitVariable(variable: Variable): void {}\n  visitReference(reference: Reference): void {}\n  visitTextAttribute(attribute: TextAttribute): void {}\n  visitBoundAttribute(attribute: BoundAttribute): void {}\n  visitBoundEvent(attribute: BoundEvent): void {}\n  visitText(text: Text): void {}\n  visitBoundText(text: BoundText): void {}\n  visitIcu(icu: Icu): void {}\n}\n\nexport class TransformVisitor implements Visitor<Node> {\n  visitElement(element: Element): Node {\n    const newAttributes = transformAll(this, element.attributes);\n    const newInputs = transformAll(this, element.inputs);\n    const newOutputs = transformAll(this, element.outputs);\n    const newChildren = transformAll(this, element.children);\n    const newReferences = transformAll(this, element.references);\n    if (newAttributes != element.attributes || newInputs != element.inputs ||\n        newOutputs != element.outputs || newChildren != element.children ||\n        newReferences != element.references) {\n      return new Element(\n          element.name, newAttributes, newInputs, newOutputs, newChildren, newReferences,\n          element.sourceSpan, element.startSourceSpan, element.endSourceSpan);\n    }\n    return element;\n  }\n\n  visitTemplate(template: Template): Node {\n    const newAttributes = transformAll(this, template.attributes);\n    const newInputs = transformAll(this, template.inputs);\n    const newOutputs = transformAll(this, template.outputs);\n    const newTemplateAttrs = transformAll(this, template.templateAttrs);\n    const newChildren = transformAll(this, template.children);\n    const newReferences = transformAll(this, template.references);\n    const newVariables = transformAll(this, template.variables);\n    if (newAttributes != template.attributes || newInputs != template.inputs ||\n        newOutputs != template.outputs || newTemplateAttrs != template.templateAttrs ||\n        newChildren != template.children || newReferences != template.references ||\n        newVariables != template.variables) {\n      return new Template(\n          template.tagName, newAttributes, newInputs, newOutputs, newTemplateAttrs, newChildren,\n          newReferences, newVariables, template.sourceSpan, template.startSourceSpan,\n          template.endSourceSpan);\n    }\n    return template;\n  }\n\n  visitContent(content: Content): Node {\n    return content;\n  }\n\n  visitVariable(variable: Variable): Node {\n    return variable;\n  }\n  visitReference(reference: Reference): Node {\n    return reference;\n  }\n  visitTextAttribute(attribute: TextAttribute): Node {\n    return attribute;\n  }\n  visitBoundAttribute(attribute: BoundAttribute): Node {\n    return attribute;\n  }\n  visitBoundEvent(attribute: BoundEvent): Node {\n    return attribute;\n  }\n  visitText(text: Text): Node {\n    return text;\n  }\n  visitBoundText(text: BoundText): Node {\n    return text;\n  }\n  visitIcu(icu: Icu): Node {\n    return icu;\n  }\n}\n\nexport function visitAll<Result>(visitor: Visitor<Result>, nodes: Node[]): Result[] {\n  const result: Result[] = [];\n  if (visitor.visit) {\n    for (const node of nodes) {\n      const newNode = visitor.visit(node) || node.visit(visitor);\n    }\n  } else {\n    for (const node of nodes) {\n      const newNode = node.visit(visitor);\n      if (newNode) {\n        result.push(newNode);\n      }\n    }\n  }\n  return result;\n}\n\nexport function transformAll<Result extends Node>(\n    visitor: Visitor<Node>, nodes: Result[]): Result[] {\n  const result: Result[] = [];\n  let changed = false;\n  for (const node of nodes) {\n    const newNode = node.visit(visitor);\n    if (newNode) {\n      result.push(newNode as Result);\n    }\n    changed = changed || newNode != node;\n  }\n  return changed ? result : nodes;\n}\n"]}