library angular2.src.compiler.html_ast;

import "package:angular2/src/facade/lang.dart" show isPresent;

import "parse_util.dart" show ParseSourceSpan;

abstract class HtmlAst {

ParseSourceSpan sourceSpan;

dynamic visit(HtmlAstVisitor visitor, dynamic context);

}

class HtmlTextAst implements HtmlAst {

String value;

ParseSourceSpan sourceSpan;

HtmlTextAst(this.value, this.sourceSpan) {}

dynamic visit(HtmlAstVisitor visitor, dynamic context) {

return visitor.visitText(this, context);

}

}

class HtmlExpansionAst implements HtmlAst {

String switchValue;

String type;

List<HtmlExpansionCaseAst> cases;

ParseSourceSpan sourceSpan;

ParseSourceSpan switchValueSourceSpan;

HtmlExpansionAst(this.switchValue, this.type, this.cases, this.sourceSpan,

this.switchValueSourceSpan) {}

dynamic visit(HtmlAstVisitor visitor, dynamic context) {

return visitor.visitExpansion(this, context);

}

}

class HtmlExpansionCaseAst implements HtmlAst {

String value;

List<HtmlAst> expression;

ParseSourceSpan sourceSpan;

ParseSourceSpan valueSourceSpan;

ParseSourceSpan expSourceSpan;

HtmlExpansionCaseAst(this.value, this.expression, this.sourceSpan,

this.valueSourceSpan, this.expSourceSpan) {}

dynamic visit(HtmlAstVisitor visitor, dynamic context) {

return visitor.visitExpansionCase(this, context);

}

}

class HtmlAttrAst implements HtmlAst {

String name;

String value;

ParseSourceSpan sourceSpan;

HtmlAttrAst(this.name, this.value, this.sourceSpan) {}

dynamic visit(HtmlAstVisitor visitor, dynamic context) {

return visitor.visitAttr(this, context);

}

}

class HtmlElementAst implements HtmlAst {

String name;

List<HtmlAttrAst> attrs;

List<HtmlAst> children;

ParseSourceSpan sourceSpan;

ParseSourceSpan startSourceSpan;

ParseSourceSpan endSourceSpan;

HtmlElementAst(this.name, this.attrs, this.children, this.sourceSpan,

this.startSourceSpan, this.endSourceSpan) {}

dynamic visit(HtmlAstVisitor visitor, dynamic context) {

return visitor.visitElement(this, context);

}

}

class HtmlCommentAst implements HtmlAst {

String value;

ParseSourceSpan sourceSpan;

HtmlCommentAst(this.value, this.sourceSpan) {}

dynamic visit(HtmlAstVisitor visitor, dynamic context) {

return visitor.visitComment(this, context);

}

}

abstract class HtmlAstVisitor {

dynamic visitElement(HtmlElementAst ast, dynamic context);

dynamic visitAttr(HtmlAttrAst ast, dynamic context);

dynamic visitText(HtmlTextAst ast, dynamic context);

dynamic visitComment(HtmlCommentAst ast, dynamic context);

dynamic visitExpansion(HtmlExpansionAst ast, dynamic context);

dynamic visitExpansionCase(HtmlExpansionCaseAst ast, dynamic context);

}

List<dynamic> htmlVisitAll(HtmlAstVisitor visitor, List<HtmlAst> asts,

[dynamic context = null]) {

var result = [];

asts.forEach((ast) {

var astResult = ast.visit(visitor, context);

if (isPresent(astResult)) {

result.add(astResult);

}

});

return result;

}