angular2
Version:
Angular 2 - a web framework for modern web apps
213 lines • 32.7 kB
JavaScript
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
if (typeof Reflect === "object" && typeof Reflect.decorate === "function") return Reflect.decorate(decorators, target, key, desc);
switch (arguments.length) {
case 2: return decorators.reduceRight(function(o, d) { return (d && d(o)) || o; }, target);
case 3: return decorators.reduceRight(function(o, d) { return (d && d(target, key)), void 0; }, void 0);
case 4: return decorators.reduceRight(function(o, d) { return (d && d(target, key, o)) || o; }, desc);
}
};
var __metadata = (this && this.__metadata) || function (k, v) {
if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
};
import { isPresent, isBlank, RegExpWrapper } from 'angular2/src/facade/lang';
import { ListWrapper } from 'angular2/src/facade/collection';
import { HtmlAttrAst, HtmlTextAst, HtmlElementAst } from './html_ast';
import { Injectable } from 'angular2/src/core/di';
import { HtmlTokenType, tokenizeHtml } from './html_lexer';
import { ParseError, ParseSourceSpan } from './parse_util';
import { getHtmlTagDefinition } from './html_tags';
export class HtmlTreeError extends ParseError {
constructor(elementName, location, msg) {
super(location, msg);
this.elementName = elementName;
}
static create(elementName, location, msg) {
return new HtmlTreeError(elementName, location, msg);
}
}
export class HtmlParseTreeResult {
constructor(rootNodes, errors) {
this.rootNodes = rootNodes;
this.errors = errors;
}
}
export let HtmlParser = class {
parse(sourceContent, sourceUrl) {
var tokensAndErrors = tokenizeHtml(sourceContent, sourceUrl);
var treeAndErrors = new TreeBuilder(tokensAndErrors.tokens).build();
return new HtmlParseTreeResult(treeAndErrors.rootNodes, tokensAndErrors.errors
.concat(treeAndErrors.errors));
}
};
HtmlParser = __decorate([
Injectable(),
__metadata('design:paramtypes', [])
], HtmlParser);
class TreeBuilder {
constructor(tokens) {
this.tokens = tokens;
this.index = -1;
this.rootNodes = [];
this.errors = [];
this.elementStack = [];
this._advance();
}
build() {
while (this.peek.type !== HtmlTokenType.EOF) {
if (this.peek.type === HtmlTokenType.TAG_OPEN_START) {
this._consumeStartTag(this._advance());
}
else if (this.peek.type === HtmlTokenType.TAG_CLOSE) {
this._consumeEndTag(this._advance());
}
else if (this.peek.type === HtmlTokenType.CDATA_START) {
this._consumeCdata(this._advance());
}
else if (this.peek.type === HtmlTokenType.COMMENT_START) {
this._consumeComment(this._advance());
}
else if (this.peek.type === HtmlTokenType.TEXT ||
this.peek.type === HtmlTokenType.RAW_TEXT ||
this.peek.type === HtmlTokenType.ESCAPABLE_RAW_TEXT) {
this._consumeText(this._advance());
}
else {
// Skip all other tokens...
this._advance();
}
}
return new HtmlParseTreeResult(this.rootNodes, this.errors);
}
_advance() {
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;
}
_advanceIf(type) {
if (this.peek.type === type) {
return this._advance();
}
return null;
}
_consumeCdata(startToken) {
this._consumeText(this._advance());
this._advanceIf(HtmlTokenType.CDATA_END);
}
_consumeComment(startToken) {
this._advanceIf(HtmlTokenType.RAW_TEXT);
this._advanceIf(HtmlTokenType.COMMENT_END);
}
_consumeText(token) {
this._addToParent(new HtmlTextAst(token.parts[0], token.sourceSpan));
}
_consumeStartTag(startTagToken) {
var prefix = startTagToken.parts[0];
var name = startTagToken.parts[1];
var attrs = [];
while (this.peek.type === HtmlTokenType.ATTR_NAME) {
attrs.push(this._consumeAttr(this._advance()));
}
var fullName = getElementFullName(prefix, name, this._getParentElement());
var voidElement = 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 === HtmlTokenType.TAG_OPEN_END_VOID) {
this._advance();
voidElement = true;
}
else if (this.peek.type === HtmlTokenType.TAG_OPEN_END) {
this._advance();
voidElement = false;
}
var end = this.peek.sourceSpan.start;
var el = new HtmlElementAst(fullName, attrs, [], new ParseSourceSpan(startTagToken.sourceSpan.start, end));
this._pushElement(el);
if (voidElement) {
this._popElement(fullName);
}
}
_pushElement(el) {
if (this.elementStack.length > 0) {
var parentEl = ListWrapper.last(this.elementStack);
if (getHtmlTagDefinition(parentEl.name).isClosedByChild(el.name)) {
this.elementStack.pop();
}
}
var tagDef = getHtmlTagDefinition(el.name);
var parentEl = this._getParentElement();
if (tagDef.requireExtraParent(isPresent(parentEl) ? parentEl.name : null)) {
var newParent = new HtmlElementAst(tagDef.requiredParent, [], [el], el.sourceSpan);
this._addToParent(newParent);
this.elementStack.push(newParent);
this.elementStack.push(el);
}
else {
this._addToParent(el);
this.elementStack.push(el);
}
}
_consumeEndTag(endTagToken) {
var fullName = getElementFullName(endTagToken.parts[0], endTagToken.parts[1], this._getParentElement());
if (!this._popElement(fullName)) {
this.errors.push(HtmlTreeError.create(fullName, endTagToken.sourceSpan.start, `Unexpected closing tag "${endTagToken.parts[1]}"`));
}
}
_popElement(fullName) {
for (let stackIndex = this.elementStack.length - 1; stackIndex >= 0; stackIndex--) {
var el = this.elementStack[stackIndex];
if (el.name.toLowerCase() == fullName.toLowerCase()) {
ListWrapper.splice(this.elementStack, stackIndex, this.elementStack.length - stackIndex);
return true;
}
if (!getHtmlTagDefinition(el.name).closedByParent) {
return false;
}
}
return false;
}
_consumeAttr(attrName) {
var fullName = mergeNsAndName(attrName.parts[0], attrName.parts[1]);
var end = attrName.sourceSpan.end;
var value = '';
if (this.peek.type === HtmlTokenType.ATTR_VALUE) {
var valueToken = this._advance();
value = valueToken.parts[0];
end = valueToken.sourceSpan.end;
}
return new HtmlAttrAst(fullName, value, new ParseSourceSpan(attrName.sourceSpan.start, end));
}
_getParentElement() {
return this.elementStack.length > 0 ? ListWrapper.last(this.elementStack) : null;
}
_addToParent(node) {
var parent = this._getParentElement();
if (isPresent(parent)) {
parent.children.push(node);
}
else {
this.rootNodes.push(node);
}
}
}
function mergeNsAndName(prefix, localName) {
return isPresent(prefix) ? `@${prefix}:${localName}` : localName;
}
function getElementFullName(prefix, localName, parentElement) {
if (isBlank(prefix)) {
prefix = getHtmlTagDefinition(localName).implicitNamespacePrefix;
if (isBlank(prefix) && isPresent(parentElement)) {
prefix = namespacePrefix(parentElement.name);
}
}
return mergeNsAndName(prefix, localName);
}
var NS_PREFIX_RE = /^@([^:]+)/g;
function namespacePrefix(elementName) {
var match = RegExpWrapper.firstMatch(NS_PREFIX_RE, elementName);
return isBlank(match) ? null : match[1];
}
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{\n  isPresent,\n  isBlank,\n  StringWrapper,\n  stringify,\n  assertionsEnabled,\n  StringJoiner,\n  RegExpWrapper,\n  serializeEnum,\n  CONST_EXPR\n} from 'angular2/src/facade/lang';\n\nimport {ListWrapper} from 'angular2/src/facade/collection';\n\nimport {HtmlAst, HtmlAttrAst, HtmlTextAst, HtmlElementAst} from './html_ast';\n\nimport {Injectable} from 'angular2/src/core/di';\nimport {HtmlToken, HtmlTokenType, tokenizeHtml} from './html_lexer';\nimport {ParseError, ParseLocation, ParseSourceSpan} from './parse_util';\nimport {HtmlTagDefinition, getHtmlTagDefinition} from './html_tags';\n\nexport class HtmlTreeError extends ParseError {\n  static create(elementName: string, location: ParseLocation, msg: string): HtmlTreeError {\n    return new HtmlTreeError(elementName, location, msg);\n  }\n\n  constructor(public elementName: string, location: ParseLocation, msg: string) {\n    super(location, msg);\n  }\n}\n\nexport class HtmlParseTreeResult {\n  constructor(public rootNodes: HtmlAst[], public errors: ParseError[]) {}\n}\n\n@Injectable()\nexport class HtmlParser {\n  parse(sourceContent: string, sourceUrl: string): HtmlParseTreeResult {\n    var tokensAndErrors = tokenizeHtml(sourceContent, sourceUrl);\n    var treeAndErrors = new TreeBuilder(tokensAndErrors.tokens).build();\n    return new HtmlParseTreeResult(treeAndErrors.rootNodes, (<ParseError[]>tokensAndErrors.errors)\n                                                                .concat(treeAndErrors.errors));\n  }\n}\n\nclass TreeBuilder {\n  private index: number = -1;\n  private peek: HtmlToken;\n\n  private rootNodes: HtmlAst[] = [];\n  private errors: HtmlTreeError[] = [];\n\n  private elementStack: HtmlElementAst[] = [];\n\n  constructor(private tokens: HtmlToken[]) { this._advance(); }\n\n  build(): HtmlParseTreeResult {\n    while (this.peek.type !== HtmlTokenType.EOF) {\n      if (this.peek.type === HtmlTokenType.TAG_OPEN_START) {\n        this._consumeStartTag(this._advance());\n      } else if (this.peek.type === HtmlTokenType.TAG_CLOSE) {\n        this._consumeEndTag(this._advance());\n      } else if (this.peek.type === HtmlTokenType.CDATA_START) {\n        this._consumeCdata(this._advance());\n      } else if (this.peek.type === HtmlTokenType.COMMENT_START) {\n        this._consumeComment(this._advance());\n      } else if (this.peek.type === HtmlTokenType.TEXT ||\n                 this.peek.type === HtmlTokenType.RAW_TEXT ||\n                 this.peek.type === HtmlTokenType.ESCAPABLE_RAW_TEXT) {\n        this._consumeText(this._advance());\n      } else {\n        // Skip all other tokens...\n        this._advance();\n      }\n    }\n    return new HtmlParseTreeResult(this.rootNodes, this.errors);\n  }\n\n  private _advance(): HtmlToken {\n    var 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: HtmlTokenType): HtmlToken {\n    if (this.peek.type === type) {\n      return this._advance();\n    }\n    return null;\n  }\n\n  private _consumeCdata(startToken: HtmlToken) {\n    this._consumeText(this._advance());\n    this._advanceIf(HtmlTokenType.CDATA_END);\n  }\n\n  private _consumeComment(startToken: HtmlToken) {\n    this._advanceIf(HtmlTokenType.RAW_TEXT);\n    this._advanceIf(HtmlTokenType.COMMENT_END);\n  }\n\n  private _consumeText(token: HtmlToken) {\n    this._addToParent(new HtmlTextAst(token.parts[0], token.sourceSpan));\n  }\n\n  private _consumeStartTag(startTagToken: HtmlToken) {\n    var prefix = startTagToken.parts[0];\n    var name = startTagToken.parts[1];\n    var attrs = [];\n    while (this.peek.type === HtmlTokenType.ATTR_NAME) {\n      attrs.push(this._consumeAttr(this._advance()));\n    }\n    var fullName = getElementFullName(prefix, name, this._getParentElement());\n    var voidElement = 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 === HtmlTokenType.TAG_OPEN_END_VOID) {\n      this._advance();\n      voidElement = true;\n    } else if (this.peek.type === HtmlTokenType.TAG_OPEN_END) {\n      this._advance();\n      voidElement = false;\n    }\n    var end = this.peek.sourceSpan.start;\n    var el = new HtmlElementAst(fullName, attrs, [],\n                                new ParseSourceSpan(startTagToken.sourceSpan.start, end));\n    this._pushElement(el);\n    if (voidElement) {\n      this._popElement(fullName);\n    }\n  }\n\n  private _pushElement(el: HtmlElementAst) {\n    if (this.elementStack.length > 0) {\n      var parentEl = ListWrapper.last(this.elementStack);\n      if (getHtmlTagDefinition(parentEl.name).isClosedByChild(el.name)) {\n        this.elementStack.pop();\n      }\n    }\n\n    var tagDef = getHtmlTagDefinition(el.name);\n    var parentEl = this._getParentElement();\n    if (tagDef.requireExtraParent(isPresent(parentEl) ? parentEl.name : null)) {\n      var newParent = new HtmlElementAst(tagDef.requiredParent, [], [el], el.sourceSpan);\n      this._addToParent(newParent);\n      this.elementStack.push(newParent);\n      this.elementStack.push(el);\n    } else {\n      this._addToParent(el);\n      this.elementStack.push(el);\n    }\n  }\n\n  private _consumeEndTag(endTagToken: HtmlToken) {\n    var fullName =\n        getElementFullName(endTagToken.parts[0], endTagToken.parts[1], this._getParentElement());\n    if (!this._popElement(fullName)) {\n      this.errors.push(HtmlTreeError.create(fullName, endTagToken.sourceSpan.start,\n                                            `Unexpected closing tag \"${endTagToken.parts[1]}\"`));\n    }\n  }\n\n  private _popElement(fullName: string): boolean {\n    for (let stackIndex = this.elementStack.length - 1; stackIndex >= 0; stackIndex--) {\n      var el = this.elementStack[stackIndex];\n      if (el.name.toLowerCase() == fullName.toLowerCase()) {\n        ListWrapper.splice(this.elementStack, stackIndex, this.elementStack.length - stackIndex);\n        return true;\n      }\n      if (!getHtmlTagDefinition(el.name).closedByParent) {\n        return false;\n      }\n    }\n    return false;\n  }\n\n  private _consumeAttr(attrName: HtmlToken): HtmlAttrAst {\n    var fullName = mergeNsAndName(attrName.parts[0], attrName.parts[1]);\n    var end = attrName.sourceSpan.end;\n    var value = '';\n    if (this.peek.type === HtmlTokenType.ATTR_VALUE) {\n      var valueToken = this._advance();\n      value = valueToken.parts[0];\n      end = valueToken.sourceSpan.end;\n    }\n    return new HtmlAttrAst(fullName, value, new ParseSourceSpan(attrName.sourceSpan.start, end));\n  }\n\n  private _getParentElement(): HtmlElementAst {\n    return this.elementStack.length > 0 ? ListWrapper.last(this.elementStack) : null;\n  }\n\n  private _addToParent(node: HtmlAst) {\n    var parent = this._getParentElement();\n    if (isPresent(parent)) {\n      parent.children.push(node);\n    } else {\n      this.rootNodes.push(node);\n    }\n  }\n}\n\nfunction mergeNsAndName(prefix: string, localName: string): string {\n  return isPresent(prefix) ? `@${prefix}:${localName}` : localName;\n}\n\nfunction getElementFullName(prefix: string, localName: string,\n                            parentElement: HtmlElementAst): string {\n  if (isBlank(prefix)) {\n    prefix = getHtmlTagDefinition(localName).implicitNamespacePrefix;\n    if (isBlank(prefix) && isPresent(parentElement)) {\n      prefix = namespacePrefix(parentElement.name);\n    }\n  }\n\n  return mergeNsAndName(prefix, localName);\n}\n\nvar NS_PREFIX_RE = /^@([^:]+)/g;\n\nfunction namespacePrefix(elementName: string): string {\n  var match = RegExpWrapper.firstMatch(NS_PREFIX_RE, elementName);\n  return isBlank(match) ? null : match[1];\n}\n"]}