40 lines
1.3 KiB
TypeScript
40 lines
1.3 KiB
TypeScript
import {isPresent} from 'angular2/src/facade/lang';
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export interface HtmlAst {
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sourceInfo: string;
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visit(visitor: HtmlAstVisitor, context: any): any;
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}
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export class HtmlTextAst implements HtmlAst {
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constructor(public value: string, public sourceInfo: string) {}
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visit(visitor: HtmlAstVisitor, context: any): any { return visitor.visitText(this, context); }
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}
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export class HtmlAttrAst implements HtmlAst {
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constructor(public name: string, public value: string, public sourceInfo: string) {}
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visit(visitor: HtmlAstVisitor, context: any): any { return visitor.visitAttr(this, context); }
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}
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export class HtmlElementAst implements HtmlAst {
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constructor(public name: string, public attrs: HtmlAttrAst[], public children: HtmlAst[],
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public sourceInfo: string) {}
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visit(visitor: HtmlAstVisitor, context: any): any { return visitor.visitElement(this, context); }
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}
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export interface HtmlAstVisitor {
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visitElement(ast: HtmlElementAst, context: any): any;
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visitAttr(ast: HtmlAttrAst, context: any): any;
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visitText(ast: HtmlTextAst, context: any): any;
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}
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export function htmlVisitAll(visitor: HtmlAstVisitor, asts: HtmlAst[], context: any = null): any[] {
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var result = [];
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asts.forEach(ast => {
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var astResult = ast.visit(visitor, context);
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if (isPresent(astResult)) {
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result.push(astResult);
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}
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});
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return result;
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}
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