angular2
Version:
Angular 2 - a web framework for modern web apps
216 lines • 25.7 kB
JavaScript
import { isPresent } from 'angular2/src/facade/lang';
/**
* A segment of text within the template.
*/
export class TextAst {
constructor(value, ngContentIndex, sourceSpan) {
this.value = value;
this.ngContentIndex = ngContentIndex;
this.sourceSpan = sourceSpan;
}
visit(visitor, context) { return visitor.visitText(this, context); }
}
/**
* A bound expression within the text of a template.
*/
export class BoundTextAst {
constructor(value, ngContentIndex, sourceSpan) {
this.value = value;
this.ngContentIndex = ngContentIndex;
this.sourceSpan = sourceSpan;
}
visit(visitor, context) {
return visitor.visitBoundText(this, context);
}
}
/**
* A plain attribute on an element.
*/
export class AttrAst {
constructor(name, value, sourceSpan) {
this.name = name;
this.value = value;
this.sourceSpan = sourceSpan;
}
visit(visitor, context) { return visitor.visitAttr(this, context); }
}
/**
* A binding for an element property (e.g. `[property]="expression"`).
*/
export class BoundElementPropertyAst {
constructor(name, type, value, unit, sourceSpan) {
this.name = name;
this.type = type;
this.value = value;
this.unit = unit;
this.sourceSpan = sourceSpan;
}
visit(visitor, context) {
return visitor.visitElementProperty(this, context);
}
}
/**
* A binding for an element event (e.g. `(event)="handler()"`).
*/
export class BoundEventAst {
constructor(name, target, handler, sourceSpan) {
this.name = name;
this.target = target;
this.handler = handler;
this.sourceSpan = sourceSpan;
}
visit(visitor, context) {
return visitor.visitEvent(this, context);
}
get fullName() {
if (isPresent(this.target)) {
return `${this.target}:${this.name}`;
}
else {
return this.name;
}
}
}
/**
* A variable declaration on an element (e.g. `#var="expression"`).
*/
export class VariableAst {
constructor(name, value, sourceSpan) {
this.name = name;
this.value = value;
this.sourceSpan = sourceSpan;
}
visit(visitor, context) {
return visitor.visitVariable(this, context);
}
}
/**
* An element declaration in a template.
*/
export class ElementAst {
constructor(name, attrs, inputs, outputs, exportAsVars, directives, children, ngContentIndex, sourceSpan) {
this.name = name;
this.attrs = attrs;
this.inputs = inputs;
this.outputs = outputs;
this.exportAsVars = exportAsVars;
this.directives = directives;
this.children = children;
this.ngContentIndex = ngContentIndex;
this.sourceSpan = sourceSpan;
}
visit(visitor, context) {
return visitor.visitElement(this, context);
}
/**
* Whether the element has any active bindings (inputs, outputs, vars, or directives).
*/
isBound() {
return (this.inputs.length > 0 || this.outputs.length > 0 || this.exportAsVars.length > 0 ||
this.directives.length > 0);
}
/**
* Get the component associated with this element, if any.
*/
getComponent() {
return this.directives.length > 0 && this.directives[0].directive.isComponent ?
this.directives[0].directive :
null;
}
}
/**
* A `<template>` element included in an Angular template.
*/
export class EmbeddedTemplateAst {
constructor(attrs, outputs, vars, directives, children, ngContentIndex, sourceSpan) {
this.attrs = attrs;
this.outputs = outputs;
this.vars = vars;
this.directives = directives;
this.children = children;
this.ngContentIndex = ngContentIndex;
this.sourceSpan = sourceSpan;
}
visit(visitor, context) {
return visitor.visitEmbeddedTemplate(this, context);
}
}
/**
* A directive property with a bound value (e.g. `*ngIf="condition").
*/
export class BoundDirectivePropertyAst {
constructor(directiveName, templateName, value, sourceSpan) {
this.directiveName = directiveName;
this.templateName = templateName;
this.value = value;
this.sourceSpan = sourceSpan;
}
visit(visitor, context) {
return visitor.visitDirectiveProperty(this, context);
}
}
/**
* A directive declared on an element.
*/
export class DirectiveAst {
constructor(directive, inputs, hostProperties, hostEvents, exportAsVars, sourceSpan) {
this.directive = directive;
this.inputs = inputs;
this.hostProperties = hostProperties;
this.hostEvents = hostEvents;
this.exportAsVars = exportAsVars;
this.sourceSpan = sourceSpan;
}
visit(visitor, context) {
return visitor.visitDirective(this, context);
}
}
/**
* Position where content is to be projected (instance of `<ng-content>` in a template).
*/
export class NgContentAst {
constructor(index, ngContentIndex, sourceSpan) {
this.index = index;
this.ngContentIndex = ngContentIndex;
this.sourceSpan = sourceSpan;
}
visit(visitor, context) {
return visitor.visitNgContent(this, context);
}
}
/**
* Enumeration of types of property bindings.
*/
export var PropertyBindingType;
(function (PropertyBindingType) {
/**
* A normal binding to a property (e.g. `[property]="expression"`).
*/
PropertyBindingType[PropertyBindingType["Property"] = 0] = "Property";
/**
* A binding to an element attribute (e.g. `[attr.name]="expression"`).
*/
PropertyBindingType[PropertyBindingType["Attribute"] = 1] = "Attribute";
/**
* A binding to a CSS class (e.g. `[class.name]="condition"`).
*/
PropertyBindingType[PropertyBindingType["Class"] = 2] = "Class";
/**
* A binding to a style rule (e.g. `[style.rule]="expression"`).
*/
PropertyBindingType[PropertyBindingType["Style"] = 3] = "Style";
})(PropertyBindingType || (PropertyBindingType = {}));
/**
* Visit every node in a list of {@link TemplateAst}s with the given {@link TemplateAstVisitor}.
*/
export function templateVisitAll(visitor, asts, context = null) {
var result = [];
asts.forEach(ast => {
var astResult = ast.visit(visitor, context);
if (isPresent(astResult)) {
result.push(astResult);
}
});
return result;
}
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{AST} from 'angular2/src/core/change_detection/change_detection';\nimport {isPresent} from 'angular2/src/facade/lang';\nimport {CompileDirectiveMetadata} from './directive_metadata';\nimport {ParseSourceSpan} from './parse_util';\n\n/**\n * An Abstract Syntax Tree node representing part of a parsed Angular template.\n */\nexport interface TemplateAst {\n  /**\n   * The source span from which this node was parsed.\n   */\n  sourceSpan: ParseSourceSpan;\n\n  /**\n   * Visit this node and possibly transform it.\n   */\n  visit(visitor: TemplateAstVisitor, context: any): any;\n}\n\n/**\n * A segment of text within the template.\n */\nexport class TextAst implements TemplateAst {\n  constructor(public value: string, public ngContentIndex: number,\n              public sourceSpan: ParseSourceSpan) {}\n  visit(visitor: TemplateAstVisitor, context: any): any { return visitor.visitText(this, context); }\n}\n\n/**\n * A bound expression within the text of a template.\n */\nexport class BoundTextAst implements TemplateAst {\n  constructor(public value: AST, public ngContentIndex: number,\n              public sourceSpan: ParseSourceSpan) {}\n  visit(visitor: TemplateAstVisitor, context: any): any {\n    return visitor.visitBoundText(this, context);\n  }\n}\n\n/**\n * A plain attribute on an element.\n */\nexport class AttrAst implements TemplateAst {\n  constructor(public name: string, public value: string, public sourceSpan: ParseSourceSpan) {}\n  visit(visitor: TemplateAstVisitor, context: any): any { return visitor.visitAttr(this, context); }\n}\n\n/**\n * A binding for an element property (e.g. `[property]=\"expression\"`).\n */\nexport class BoundElementPropertyAst implements TemplateAst {\n  constructor(public name: string, public type: PropertyBindingType, public value: AST,\n              public unit: string, public sourceSpan: ParseSourceSpan) {}\n  visit(visitor: TemplateAstVisitor, context: any): any {\n    return visitor.visitElementProperty(this, context);\n  }\n}\n\n/**\n * A binding for an element event (e.g. `(event)=\"handler()\"`).\n */\nexport class BoundEventAst implements TemplateAst {\n  constructor(public name: string, public target: string, public handler: AST,\n              public sourceSpan: ParseSourceSpan) {}\n  visit(visitor: TemplateAstVisitor, context: any): any {\n    return visitor.visitEvent(this, context);\n  }\n  get fullName() {\n    if (isPresent(this.target)) {\n      return `${this.target}:${this.name}`;\n    } else {\n      return this.name;\n    }\n  }\n}\n\n/**\n * A variable declaration on an element (e.g. `#var=\"expression\"`).\n */\nexport class VariableAst implements TemplateAst {\n  constructor(public name: string, public value: string, public sourceSpan: ParseSourceSpan) {}\n  visit(visitor: TemplateAstVisitor, context: any): any {\n    return visitor.visitVariable(this, context);\n  }\n}\n\n/**\n * An element declaration in a template.\n */\nexport class ElementAst implements TemplateAst {\n  constructor(public name: string, public attrs: AttrAst[],\n              public inputs: BoundElementPropertyAst[], public outputs: BoundEventAst[],\n              public exportAsVars: VariableAst[], public directives: DirectiveAst[],\n              public children: TemplateAst[], public ngContentIndex: number,\n              public sourceSpan: ParseSourceSpan) {}\n  visit(visitor: TemplateAstVisitor, context: any): any {\n    return visitor.visitElement(this, context);\n  }\n\n  /**\n   * Whether the element has any active bindings (inputs, outputs, vars, or directives).\n   */\n  isBound(): boolean {\n    return (this.inputs.length > 0 || this.outputs.length > 0 || this.exportAsVars.length > 0 ||\n            this.directives.length > 0);\n  }\n\n  /**\n   * Get the component associated with this element, if any.\n   */\n  getComponent(): CompileDirectiveMetadata {\n    return this.directives.length > 0 && this.directives[0].directive.isComponent ?\n               this.directives[0].directive :\n               null;\n  }\n}\n\n/**\n * A `<template>` element included in an Angular template.\n */\nexport class EmbeddedTemplateAst implements TemplateAst {\n  constructor(public attrs: AttrAst[], public outputs: BoundEventAst[], public vars: VariableAst[],\n              public directives: DirectiveAst[], public children: TemplateAst[],\n              public ngContentIndex: number, public sourceSpan: ParseSourceSpan) {}\n  visit(visitor: TemplateAstVisitor, context: any): any {\n    return visitor.visitEmbeddedTemplate(this, context);\n  }\n}\n\n/**\n * A directive property with a bound value (e.g. `*ngIf=\"condition\").\n */\nexport class BoundDirectivePropertyAst implements TemplateAst {\n  constructor(public directiveName: string, public templateName: string, public value: AST,\n              public sourceSpan: ParseSourceSpan) {}\n  visit(visitor: TemplateAstVisitor, context: any): any {\n    return visitor.visitDirectiveProperty(this, context);\n  }\n}\n\n/**\n * A directive declared on an element.\n */\nexport class DirectiveAst implements TemplateAst {\n  constructor(public directive: CompileDirectiveMetadata,\n              public inputs: BoundDirectivePropertyAst[],\n              public hostProperties: BoundElementPropertyAst[], public hostEvents: BoundEventAst[],\n              public exportAsVars: VariableAst[], public sourceSpan: ParseSourceSpan) {}\n  visit(visitor: TemplateAstVisitor, context: any): any {\n    return visitor.visitDirective(this, context);\n  }\n}\n\n/**\n * Position where content is to be projected (instance of `<ng-content>` in a template).\n */\nexport class NgContentAst implements TemplateAst {\n  constructor(public index: number, public ngContentIndex: number,\n              public sourceSpan: ParseSourceSpan) {}\n  visit(visitor: TemplateAstVisitor, context: any): any {\n    return visitor.visitNgContent(this, context);\n  }\n}\n\n/**\n * Enumeration of types of property bindings.\n */\nexport enum PropertyBindingType {\n\n  /**\n   * A normal binding to a property (e.g. `[property]=\"expression\"`).\n   */\n  Property,\n\n  /**\n   * A binding to an element attribute (e.g. `[attr.name]=\"expression\"`).\n   */\n  Attribute,\n\n  /**\n   * A binding to a CSS class (e.g. `[class.name]=\"condition\"`).\n   */\n  Class,\n\n  /**\n   * A binding to a style rule (e.g. `[style.rule]=\"expression\"`).\n   */\n  Style\n}\n\n/**\n * A visitor for {@link TemplateAst} trees that will process each node.\n */\nexport interface TemplateAstVisitor {\n  visitNgContent(ast: NgContentAst, context: any): any;\n  visitEmbeddedTemplate(ast: EmbeddedTemplateAst, context: any): any;\n  visitElement(ast: ElementAst, context: any): any;\n  visitVariable(ast: VariableAst, context: any): any;\n  visitEvent(ast: BoundEventAst, context: any): any;\n  visitElementProperty(ast: BoundElementPropertyAst, context: any): any;\n  visitAttr(ast: AttrAst, context: any): any;\n  visitBoundText(ast: BoundTextAst, context: any): any;\n  visitText(ast: TextAst, context: any): any;\n  visitDirective(ast: DirectiveAst, context: any): any;\n  visitDirectiveProperty(ast: BoundDirectivePropertyAst, context: any): any;\n}\n\n/**\n * Visit every node in a list of {@link TemplateAst}s with the given {@link TemplateAstVisitor}.\n */\nexport function templateVisitAll(visitor: TemplateAstVisitor, asts: TemplateAst[],\n                                 context: any = null): any[] {\n  var result = [];\n  asts.forEach(ast => {\n    var astResult = ast.visit(visitor, context);\n    if (isPresent(astResult)) {\n      result.push(astResult);\n    }\n  });\n  return result;\n}\n"]}