/**
 * @license
 * Copyright Google Inc. 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/ml_parser/parser", ["require", "exports", "tslib", "@angular/compiler/src/parse_util", "@angular/compiler/src/ml_parser/ast", "@angular/compiler/src/ml_parser/lexer", "@angular/compiler/src/ml_parser/tags"], factory);
    }
})(function (require, exports) {
    "use strict";
    Object.defineProperty(exports, "__esModule", { value: true });
    var tslib_1 = require("tslib");
    var parse_util_1 = require("@angular/compiler/src/parse_util");
    var html = require("@angular/compiler/src/ml_parser/ast");
    var lex = require("@angular/compiler/src/ml_parser/lexer");
    var tags_1 = require("@angular/compiler/src/ml_parser/tags");
    var TreeError = /** @class */ (function (_super) {
        tslib_1.__extends(TreeError, _super);
        function TreeError(elementName, span, msg) {
            var _this = _super.call(this, span, msg) || this;
            _this.elementName = elementName;
            return _this;
        }
        TreeError.create = function (elementName, span, msg) {
            return new TreeError(elementName, span, msg);
        };
        return TreeError;
    }(parse_util_1.ParseError));
    exports.TreeError = TreeError;
    var ParseTreeResult = /** @class */ (function () {
        function ParseTreeResult(rootNodes, errors) {
            this.rootNodes = rootNodes;
            this.errors = errors;
        }
        return ParseTreeResult;
    }());
    exports.ParseTreeResult = ParseTreeResult;
    var Parser = /** @class */ (function () {
        function Parser(getTagDefinition) {
            this.getTagDefinition = getTagDefinition;
        }
        Parser.prototype.parse = function (source, url, options) {
            var tokensAndErrors = lex.tokenize(source, url, this.getTagDefinition, options);
            var treeAndErrors = new _TreeBuilder(tokensAndErrors.tokens, this.getTagDefinition).build();
            return new ParseTreeResult(treeAndErrors.rootNodes, tokensAndErrors.errors.concat(treeAndErrors.errors));
        };
        return Parser;
    }());
    exports.Parser = Parser;
    var _TreeBuilder = /** @class */ (function () {
        function _TreeBuilder(tokens, getTagDefinition) {
            this.tokens = tokens;
            this.getTagDefinition = getTagDefinition;
            this._index = -1;
            this._rootNodes = [];
            this._errors = [];
            this._elementStack = [];
            this._advance();
        }
        _TreeBuilder.prototype.build = function () {
            while (this._peek.type !== lex.TokenType.EOF) {
                if (this._peek.type === lex.TokenType.TAG_OPEN_START) {
                    this._consumeStartTag(this._advance());
                }
                else if (this._peek.type === lex.TokenType.TAG_CLOSE) {
                    this._consumeEndTag(this._advance());
                }
                else if (this._peek.type === lex.TokenType.CDATA_START) {
                    this._closeVoidElement();
                    this._consumeCdata(this._advance());
                }
                else if (this._peek.type === lex.TokenType.COMMENT_START) {
                    this._closeVoidElement();
                    this._consumeComment(this._advance());
                }
                else if (this._peek.type === lex.TokenType.TEXT || this._peek.type === lex.TokenType.RAW_TEXT ||
                    this._peek.type === lex.TokenType.ESCAPABLE_RAW_TEXT) {
                    this._closeVoidElement();
                    this._consumeText(this._advance());
                }
                else if (this._peek.type === lex.TokenType.EXPANSION_FORM_START) {
                    this._consumeExpansion(this._advance());
                }
                else {
                    // Skip all other tokens...
                    this._advance();
                }
            }
            return new ParseTreeResult(this._rootNodes, this._errors);
        };
        _TreeBuilder.prototype._advance = function () {
            var prev = this._peek;
            if (this._index < this.tokens.length - 1) {
                // Note: there is always an EOF token at the end
                this._index++;
            }
            this._peek = this.tokens[this._index];
            return prev;
        };
        _TreeBuilder.prototype._advanceIf = function (type) {
            if (this._peek.type === type) {
                return this._advance();
            }
            return null;
        };
        _TreeBuilder.prototype._consumeCdata = function (startToken) {
            this._consumeText(this._advance());
            this._advanceIf(lex.TokenType.CDATA_END);
        };
        _TreeBuilder.prototype._consumeComment = function (token) {
            var text = this._advanceIf(lex.TokenType.RAW_TEXT);
            this._advanceIf(lex.TokenType.COMMENT_END);
            var value = text != null ? text.parts[0].trim() : null;
            this._addToParent(new html.Comment(value, token.sourceSpan));
        };
        _TreeBuilder.prototype._consumeExpansion = function (token) {
            var switchValue = this._advance();
            var type = this._advance();
            var cases = [];
            // read =
            while (this._peek.type === lex.TokenType.EXPANSION_CASE_VALUE) {
                var expCase = this._parseExpansionCase();
                if (!expCase)
                    return; // error
                cases.push(expCase);
            }
            // read the final }
            if (this._peek.type !== lex.TokenType.EXPANSION_FORM_END) {
                this._errors.push(TreeError.create(null, this._peek.sourceSpan, "Invalid ICU message. Missing '}'."));
                return;
            }
            var sourceSpan = new parse_util_1.ParseSourceSpan(token.sourceSpan.start, this._peek.sourceSpan.end);
            this._addToParent(new html.Expansion(switchValue.parts[0], type.parts[0], cases, sourceSpan, switchValue.sourceSpan));
            this._advance();
        };
        _TreeBuilder.prototype._parseExpansionCase = function () {
            var value = this._advance();
            // read {
            if (this._peek.type !== lex.TokenType.EXPANSION_CASE_EXP_START) {
                this._errors.push(TreeError.create(null, this._peek.sourceSpan, "Invalid ICU message. Missing '{'."));
                return null;
            }
            // read until }
            var start = this._advance();
            var exp = this._collectExpansionExpTokens(start);
            if (!exp)
                return null;
            var end = this._advance();
            exp.push(new lex.Token(lex.TokenType.EOF, [], end.sourceSpan));
            // parse everything in between { and }
            var parsedExp = new _TreeBuilder(exp, this.getTagDefinition).build();
            if (parsedExp.errors.length > 0) {
                this._errors = this._errors.concat(parsedExp.errors);
                return null;
            }
            var sourceSpan = new parse_util_1.ParseSourceSpan(value.sourceSpan.start, end.sourceSpan.end);
            var expSourceSpan = new parse_util_1.ParseSourceSpan(start.sourceSpan.start, end.sourceSpan.end);
            return new html.ExpansionCase(value.parts[0], parsedExp.rootNodes, sourceSpan, value.sourceSpan, expSourceSpan);
        };
        _TreeBuilder.prototype._collectExpansionExpTokens = function (start) {
            var exp = [];
            var expansionFormStack = [lex.TokenType.EXPANSION_CASE_EXP_START];
            while (true) {
                if (this._peek.type === lex.TokenType.EXPANSION_FORM_START ||
                    this._peek.type === lex.TokenType.EXPANSION_CASE_EXP_START) {
                    expansionFormStack.push(this._peek.type);
                }
                if (this._peek.type === lex.TokenType.EXPANSION_CASE_EXP_END) {
                    if (lastOnStack(expansionFormStack, lex.TokenType.EXPANSION_CASE_EXP_START)) {
                        expansionFormStack.pop();
                        if (expansionFormStack.length == 0)
                            return exp;
                    }
                    else {
                        this._errors.push(TreeError.create(null, start.sourceSpan, "Invalid ICU message. Missing '}'."));
                        return null;
                    }
                }
                if (this._peek.type === lex.TokenType.EXPANSION_FORM_END) {
                    if (lastOnStack(expansionFormStack, lex.TokenType.EXPANSION_FORM_START)) {
                        expansionFormStack.pop();
                    }
                    else {
                        this._errors.push(TreeError.create(null, start.sourceSpan, "Invalid ICU message. Missing '}'."));
                        return null;
                    }
                }
                if (this._peek.type === lex.TokenType.EOF) {
                    this._errors.push(TreeError.create(null, start.sourceSpan, "Invalid ICU message. Missing '}'."));
                    return null;
                }
                exp.push(this._advance());
            }
        };
        _TreeBuilder.prototype._consumeText = function (token) {
            var text = token.parts[0];
            if (text.length > 0 && text[0] == '\n') {
                var parent_1 = this._getParentElement();
                if (parent_1 != null && parent_1.children.length == 0 &&
                    this.getTagDefinition(parent_1.name).ignoreFirstLf) {
                    text = text.substring(1);
                }
            }
            if (text.length > 0) {
                this._addToParent(new html.Text(text, token.sourceSpan));
            }
        };
        _TreeBuilder.prototype._closeVoidElement = function () {
            var el = this._getParentElement();
            if (el && this.getTagDefinition(el.name).isVoid) {
                this._elementStack.pop();
            }
        };
        _TreeBuilder.prototype._consumeStartTag = function (startTagToken) {
            var prefix = startTagToken.parts[0];
            var name = startTagToken.parts[1];
            var attrs = [];
            while (this._peek.type === lex.TokenType.ATTR_NAME) {
                attrs.push(this._consumeAttr(this._advance()));
            }
            var fullName = this._getElementFullName(prefix, name, this._getParentElement());
            var selfClosing = false;
            // Note: There could have been a tokenizer error
            // so that we don't get a token for the end tag...
            if (this._peek.type === lex.TokenType.TAG_OPEN_END_VOID) {
                this._advance();
                selfClosing = true;
                var tagDef = this.getTagDefinition(fullName);
                if (!(tagDef.canSelfClose || tags_1.getNsPrefix(fullName) !== null || tagDef.isVoid)) {
                    this._errors.push(TreeError.create(fullName, startTagToken.sourceSpan, "Only void and foreign elements can be self closed \"" + startTagToken.parts[1] + "\""));
                }
            }
            else if (this._peek.type === lex.TokenType.TAG_OPEN_END) {
                this._advance();
                selfClosing = false;
            }
            var end = this._peek.sourceSpan.start;
            var span = new parse_util_1.ParseSourceSpan(startTagToken.sourceSpan.start, end);
            var el = new html.Element(fullName, attrs, [], span, span, undefined);
            this._pushElement(el);
            if (selfClosing) {
                this._popElement(fullName);
                el.endSourceSpan = span;
            }
        };
        _TreeBuilder.prototype._pushElement = function (el) {
            var parentEl = this._getParentElement();
            if (parentEl && this.getTagDefinition(parentEl.name).isClosedByChild(el.name)) {
                this._elementStack.pop();
            }
            this._addToParent(el);
            this._elementStack.push(el);
        };
        _TreeBuilder.prototype._consumeEndTag = function (endTagToken) {
            var fullName = this._getElementFullName(endTagToken.parts[0], endTagToken.parts[1], this._getParentElement());
            if (this._getParentElement()) {
                this._getParentElement().endSourceSpan = endTagToken.sourceSpan;
            }
            if (this.getTagDefinition(fullName).isVoid) {
                this._errors.push(TreeError.create(fullName, endTagToken.sourceSpan, "Void elements do not have end tags \"" + endTagToken.parts[1] + "\""));
            }
            else if (!this._popElement(fullName)) {
                var errMsg = "Unexpected closing tag \"" + fullName + "\". It may happen when the tag has already been closed by another tag. For more info see https://www.w3.org/TR/html5/syntax.html#closing-elements-that-have-implied-end-tags";
                this._errors.push(TreeError.create(fullName, endTagToken.sourceSpan, errMsg));
            }
        };
        _TreeBuilder.prototype._popElement = function (fullName) {
            for (var stackIndex = this._elementStack.length - 1; stackIndex >= 0; stackIndex--) {
                var el = this._elementStack[stackIndex];
                if (el.name == fullName) {
                    this._elementStack.splice(stackIndex, this._elementStack.length - stackIndex);
                    return true;
                }
                if (!this.getTagDefinition(el.name).closedByParent) {
                    return false;
                }
            }
            return false;
        };
        _TreeBuilder.prototype._consumeAttr = function (attrName) {
            var fullName = tags_1.mergeNsAndName(attrName.parts[0], attrName.parts[1]);
            var end = attrName.sourceSpan.end;
            var value = '';
            var valueSpan = undefined;
            if (this._peek.type === lex.TokenType.ATTR_QUOTE) {
                this._advance();
            }
            if (this._peek.type === lex.TokenType.ATTR_VALUE) {
                var valueToken = this._advance();
                value = valueToken.parts[0];
                end = valueToken.sourceSpan.end;
                valueSpan = valueToken.sourceSpan;
            }
            if (this._peek.type === lex.TokenType.ATTR_QUOTE) {
                var quoteToken = this._advance();
                end = quoteToken.sourceSpan.end;
            }
            return new html.Attribute(fullName, value, new parse_util_1.ParseSourceSpan(attrName.sourceSpan.start, end), valueSpan);
        };
        _TreeBuilder.prototype._getParentElement = function () {
            return this._elementStack.length > 0 ? this._elementStack[this._elementStack.length - 1] : null;
        };
        /**
         * Returns the parent in the DOM and the container.
         *
         * `<ng-container>` elements are skipped as they are not rendered as DOM element.
         */
        _TreeBuilder.prototype._getParentElementSkippingContainers = function () {
            var container = null;
            for (var i = this._elementStack.length - 1; i >= 0; i--) {
                if (!tags_1.isNgContainer(this._elementStack[i].name)) {
                    return { parent: this._elementStack[i], container: container };
                }
                container = this._elementStack[i];
            }
            return { parent: null, container: container };
        };
        _TreeBuilder.prototype._addToParent = function (node) {
            var parent = this._getParentElement();
            if (parent != null) {
                parent.children.push(node);
            }
            else {
                this._rootNodes.push(node);
            }
        };
        /**
         * Insert a node between the parent and the container.
         * When no container is given, the node is appended as a child of the parent.
         * Also updates the element stack accordingly.
         *
         * @internal
         */
        _TreeBuilder.prototype._insertBeforeContainer = function (parent, container, node) {
            if (!container) {
                this._addToParent(node);
                this._elementStack.push(node);
            }
            else {
                if (parent) {
                    // replace the container with the new node in the children
                    var index = parent.children.indexOf(container);
                    parent.children[index] = node;
                }
                else {
                    this._rootNodes.push(node);
                }
                node.children.push(container);
                this._elementStack.splice(this._elementStack.indexOf(container), 0, node);
            }
        };
        _TreeBuilder.prototype._getElementFullName = function (prefix, localName, parentElement) {
            if (prefix === '') {
                prefix = this.getTagDefinition(localName).implicitNamespacePrefix || '';
                if (prefix === '' && parentElement != null) {
                    prefix = tags_1.getNsPrefix(parentElement.name);
                }
            }
            return tags_1.mergeNsAndName(prefix, localName);
        };
        return _TreeBuilder;
    }());
    function lastOnStack(stack, element) {
        return stack.length > 0 && stack[stack.length - 1] === element;
    }
});
//# 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* @license\n * Copyright Google Inc. 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 {ParseError, ParseSourceSpan} from '../parse_util';\n\nimport * as html from './ast';\nimport * as lex from './lexer';\nimport {TagDefinition, getNsPrefix, isNgContainer, mergeNsAndName} from './tags';\n\nexport class TreeError extends ParseError {\n  static create(elementName: string|null, span: ParseSourceSpan, msg: string): TreeError {\n    return new TreeError(elementName, span, msg);\n  }\n\n  constructor(public elementName: string|null, span: ParseSourceSpan, msg: string) {\n    super(span, msg);\n  }\n}\n\nexport class ParseTreeResult {\n  constructor(public rootNodes: html.Node[], public errors: ParseError[]) {}\n}\n\nexport class Parser {\n  constructor(public getTagDefinition: (tagName: string) => TagDefinition) {}\n\n  parse(source: string, url: string, options?: lex.TokenizeOptions): ParseTreeResult {\n    const tokensAndErrors = lex.tokenize(source, url, this.getTagDefinition, options);\n\n    const treeAndErrors = new _TreeBuilder(tokensAndErrors.tokens, this.getTagDefinition).build();\n\n    return new ParseTreeResult(\n        treeAndErrors.rootNodes,\n        (<ParseError[]>tokensAndErrors.errors).concat(treeAndErrors.errors));\n  }\n}\n\nclass _TreeBuilder {\n  private _index: number = -1;\n  // TODO(issue/24571): remove '!'.\n  private _peek !: lex.Token;\n\n  private _rootNodes: html.Node[] = [];\n  private _errors: TreeError[] = [];\n\n  private _elementStack: html.Element[] = [];\n\n  constructor(\n      private tokens: lex.Token[], private getTagDefinition: (tagName: string) => TagDefinition) {\n    this._advance();\n  }\n\n  build(): ParseTreeResult {\n    while (this._peek.type !== lex.TokenType.EOF) {\n      if (this._peek.type === lex.TokenType.TAG_OPEN_START) {\n        this._consumeStartTag(this._advance());\n      } else if (this._peek.type === lex.TokenType.TAG_CLOSE) {\n        this._consumeEndTag(this._advance());\n      } else if (this._peek.type === lex.TokenType.CDATA_START) {\n        this._closeVoidElement();\n        this._consumeCdata(this._advance());\n      } else if (this._peek.type === lex.TokenType.COMMENT_START) {\n        this._closeVoidElement();\n        this._consumeComment(this._advance());\n      } else if (\n          this._peek.type === lex.TokenType.TEXT || this._peek.type === lex.TokenType.RAW_TEXT ||\n          this._peek.type === lex.TokenType.ESCAPABLE_RAW_TEXT) {\n        this._closeVoidElement();\n        this._consumeText(this._advance());\n      } else if (this._peek.type === lex.TokenType.EXPANSION_FORM_START) {\n        this._consumeExpansion(this._advance());\n      } else {\n        // Skip all other tokens...\n        this._advance();\n      }\n    }\n    return new ParseTreeResult(this._rootNodes, this._errors);\n  }\n\n  private _advance(): lex.Token {\n    const prev = this._peek;\n    if (this._index < this.tokens.length - 1) {\n      // Note: there is always an EOF token at the end\n      this._index++;\n    }\n    this._peek = this.tokens[this._index];\n    return prev;\n  }\n\n  private _advanceIf(type: lex.TokenType): lex.Token|null {\n    if (this._peek.type === type) {\n      return this._advance();\n    }\n    return null;\n  }\n\n  private _consumeCdata(startToken: lex.Token) {\n    this._consumeText(this._advance());\n    this._advanceIf(lex.TokenType.CDATA_END);\n  }\n\n  private _consumeComment(token: lex.Token) {\n    const text = this._advanceIf(lex.TokenType.RAW_TEXT);\n    this._advanceIf(lex.TokenType.COMMENT_END);\n    const value = text != null ? text.parts[0].trim() : null;\n    this._addToParent(new html.Comment(value, token.sourceSpan));\n  }\n\n  private _consumeExpansion(token: lex.Token) {\n    const switchValue = this._advance();\n\n    const type = this._advance();\n    const cases: html.ExpansionCase[] = [];\n\n    // read =\n    while (this._peek.type === lex.TokenType.EXPANSION_CASE_VALUE) {\n      const expCase = this._parseExpansionCase();\n      if (!expCase) return;  // error\n      cases.push(expCase);\n    }\n\n    // read the final }\n    if (this._peek.type !== lex.TokenType.EXPANSION_FORM_END) {\n      this._errors.push(\n          TreeError.create(null, this._peek.sourceSpan, `Invalid ICU message. Missing '}'.`));\n      return;\n    }\n    const sourceSpan = new ParseSourceSpan(token.sourceSpan.start, this._peek.sourceSpan.end);\n    this._addToParent(new html.Expansion(\n        switchValue.parts[0], type.parts[0], cases, sourceSpan, switchValue.sourceSpan));\n\n    this._advance();\n  }\n\n  private _parseExpansionCase(): html.ExpansionCase|null {\n    const value = this._advance();\n\n    // read {\n    if (this._peek.type !== lex.TokenType.EXPANSION_CASE_EXP_START) {\n      this._errors.push(\n          TreeError.create(null, this._peek.sourceSpan, `Invalid ICU message. Missing '{'.`));\n      return null;\n    }\n\n    // read until }\n    const start = this._advance();\n\n    const exp = this._collectExpansionExpTokens(start);\n    if (!exp) return null;\n\n    const end = this._advance();\n    exp.push(new lex.Token(lex.TokenType.EOF, [], end.sourceSpan));\n\n    // parse everything in between { and }\n    const parsedExp = new _TreeBuilder(exp, this.getTagDefinition).build();\n    if (parsedExp.errors.length > 0) {\n      this._errors = this._errors.concat(<TreeError[]>parsedExp.errors);\n      return null;\n    }\n\n    const sourceSpan = new ParseSourceSpan(value.sourceSpan.start, end.sourceSpan.end);\n    const expSourceSpan = new ParseSourceSpan(start.sourceSpan.start, end.sourceSpan.end);\n    return new html.ExpansionCase(\n        value.parts[0], parsedExp.rootNodes, sourceSpan, value.sourceSpan, expSourceSpan);\n  }\n\n  private _collectExpansionExpTokens(start: lex.Token): lex.Token[]|null {\n    const exp: lex.Token[] = [];\n    const expansionFormStack = [lex.TokenType.EXPANSION_CASE_EXP_START];\n\n    while (true) {\n      if (this._peek.type === lex.TokenType.EXPANSION_FORM_START ||\n          this._peek.type === lex.TokenType.EXPANSION_CASE_EXP_START) {\n        expansionFormStack.push(this._peek.type);\n      }\n\n      if (this._peek.type === lex.TokenType.EXPANSION_CASE_EXP_END) {\n        if (lastOnStack(expansionFormStack, lex.TokenType.EXPANSION_CASE_EXP_START)) {\n          expansionFormStack.pop();\n          if (expansionFormStack.length == 0) return exp;\n\n        } else {\n          this._errors.push(\n              TreeError.create(null, start.sourceSpan, `Invalid ICU message. Missing '}'.`));\n          return null;\n        }\n      }\n\n      if (this._peek.type === lex.TokenType.EXPANSION_FORM_END) {\n        if (lastOnStack(expansionFormStack, lex.TokenType.EXPANSION_FORM_START)) {\n          expansionFormStack.pop();\n        } else {\n          this._errors.push(\n              TreeError.create(null, start.sourceSpan, `Invalid ICU message. Missing '}'.`));\n          return null;\n        }\n      }\n\n      if (this._peek.type === lex.TokenType.EOF) {\n        this._errors.push(\n            TreeError.create(null, start.sourceSpan, `Invalid ICU message. Missing '}'.`));\n        return null;\n      }\n\n      exp.push(this._advance());\n    }\n  }\n\n  private _consumeText(token: lex.Token) {\n    let text = token.parts[0];\n    if (text.length > 0 && text[0] == '\\n') {\n      const parent = this._getParentElement();\n      if (parent != null && parent.children.length == 0 &&\n          this.getTagDefinition(parent.name).ignoreFirstLf) {\n        text = text.substring(1);\n      }\n    }\n\n    if (text.length > 0) {\n      this._addToParent(new html.Text(text, token.sourceSpan));\n    }\n  }\n\n  private _closeVoidElement(): void {\n    const el = this._getParentElement();\n    if (el && this.getTagDefinition(el.name).isVoid) {\n      this._elementStack.pop();\n    }\n  }\n\n  private _consumeStartTag(startTagToken: lex.Token) {\n    const prefix = startTagToken.parts[0];\n    const name = startTagToken.parts[1];\n    const attrs: html.Attribute[] = [];\n    while (this._peek.type === lex.TokenType.ATTR_NAME) {\n      attrs.push(this._consumeAttr(this._advance()));\n    }\n    const fullName = this._getElementFullName(prefix, name, this._getParentElement());\n    let selfClosing = false;\n    // Note: There could have been a tokenizer error\n    // so that we don't get a token for the end tag...\n    if (this._peek.type === lex.TokenType.TAG_OPEN_END_VOID) {\n      this._advance();\n      selfClosing = true;\n      const tagDef = this.getTagDefinition(fullName);\n      if (!(tagDef.canSelfClose || getNsPrefix(fullName) !== null || tagDef.isVoid)) {\n        this._errors.push(TreeError.create(\n            fullName, startTagToken.sourceSpan,\n            `Only void and foreign elements can be self closed \"${startTagToken.parts[1]}\"`));\n      }\n    } else if (this._peek.type === lex.TokenType.TAG_OPEN_END) {\n      this._advance();\n      selfClosing = false;\n    }\n    const end = this._peek.sourceSpan.start;\n    const span = new ParseSourceSpan(startTagToken.sourceSpan.start, end);\n    const el = new html.Element(fullName, attrs, [], span, span, undefined);\n    this._pushElement(el);\n    if (selfClosing) {\n      this._popElement(fullName);\n      el.endSourceSpan = span;\n    }\n  }\n\n  private _pushElement(el: html.Element) {\n    const parentEl = this._getParentElement();\n\n    if (parentEl && this.getTagDefinition(parentEl.name).isClosedByChild(el.name)) {\n      this._elementStack.pop();\n    }\n\n    this._addToParent(el);\n    this._elementStack.push(el);\n  }\n\n  private _consumeEndTag(endTagToken: lex.Token) {\n    const fullName = this._getElementFullName(\n        endTagToken.parts[0], endTagToken.parts[1], this._getParentElement());\n\n    if (this._getParentElement()) {\n      this._getParentElement() !.endSourceSpan = endTagToken.sourceSpan;\n    }\n\n    if (this.getTagDefinition(fullName).isVoid) {\n      this._errors.push(TreeError.create(\n          fullName, endTagToken.sourceSpan,\n          `Void elements do not have end tags \"${endTagToken.parts[1]}\"`));\n    } else if (!this._popElement(fullName)) {\n      const errMsg =\n          `Unexpected closing tag \"${fullName}\". It may happen when the tag has already been closed by another tag. For more info see https://www.w3.org/TR/html5/syntax.html#closing-elements-that-have-implied-end-tags`;\n      this._errors.push(TreeError.create(fullName, endTagToken.sourceSpan, errMsg));\n    }\n  }\n\n  private _popElement(fullName: string): boolean {\n    for (let stackIndex = this._elementStack.length - 1; stackIndex >= 0; stackIndex--) {\n      const el = this._elementStack[stackIndex];\n      if (el.name == fullName) {\n        this._elementStack.splice(stackIndex, this._elementStack.length - stackIndex);\n        return true;\n      }\n\n      if (!this.getTagDefinition(el.name).closedByParent) {\n        return false;\n      }\n    }\n    return false;\n  }\n\n  private _consumeAttr(attrName: lex.Token): html.Attribute {\n    const fullName = mergeNsAndName(attrName.parts[0], attrName.parts[1]);\n    let end = attrName.sourceSpan.end;\n    let value = '';\n    let valueSpan: ParseSourceSpan = undefined !;\n    if (this._peek.type === lex.TokenType.ATTR_QUOTE) {\n      this._advance();\n    }\n    if (this._peek.type === lex.TokenType.ATTR_VALUE) {\n      const valueToken = this._advance();\n      value = valueToken.parts[0];\n      end = valueToken.sourceSpan.end;\n      valueSpan = valueToken.sourceSpan;\n    }\n    if (this._peek.type === lex.TokenType.ATTR_QUOTE) {\n      const quoteToken = this._advance();\n      end = quoteToken.sourceSpan.end;\n    }\n    return new html.Attribute(\n        fullName, value, new ParseSourceSpan(attrName.sourceSpan.start, end), valueSpan);\n  }\n\n  private _getParentElement(): html.Element|null {\n    return this._elementStack.length > 0 ? this._elementStack[this._elementStack.length - 1] : null;\n  }\n\n  /**\n   * Returns the parent in the DOM and the container.\n   *\n   * `<ng-container>` elements are skipped as they are not rendered as DOM element.\n   */\n  private _getParentElementSkippingContainers():\n      {parent: html.Element | null, container: html.Element|null} {\n    let container: html.Element|null = null;\n\n    for (let i = this._elementStack.length - 1; i >= 0; i--) {\n      if (!isNgContainer(this._elementStack[i].name)) {\n        return {parent: this._elementStack[i], container};\n      }\n      container = this._elementStack[i];\n    }\n\n    return {parent: null, container};\n  }\n\n  private _addToParent(node: html.Node) {\n    const parent = this._getParentElement();\n    if (parent != null) {\n      parent.children.push(node);\n    } else {\n      this._rootNodes.push(node);\n    }\n  }\n\n  /**\n   * Insert a node between the parent and the container.\n   * When no container is given, the node is appended as a child of the parent.\n   * Also updates the element stack accordingly.\n   *\n   * @internal\n   */\n  private _insertBeforeContainer(\n      parent: html.Element, container: html.Element|null, node: html.Element) {\n    if (!container) {\n      this._addToParent(node);\n      this._elementStack.push(node);\n    } else {\n      if (parent) {\n        // replace the container with the new node in the children\n        const index = parent.children.indexOf(container);\n        parent.children[index] = node;\n      } else {\n        this._rootNodes.push(node);\n      }\n      node.children.push(container);\n      this._elementStack.splice(this._elementStack.indexOf(container), 0, node);\n    }\n  }\n\n  private _getElementFullName(prefix: string, localName: string, parentElement: html.Element|null):\n      string {\n    if (prefix === '') {\n      prefix = this.getTagDefinition(localName).implicitNamespacePrefix || '';\n      if (prefix === '' && parentElement != null) {\n        prefix = getNsPrefix(parentElement.name);\n      }\n    }\n\n    return mergeNsAndName(prefix, localName);\n  }\n}\n\nfunction lastOnStack(stack: any[], element: any): boolean {\n  return stack.length > 0 && stack[stack.length - 1] === element;\n}\n"]}