Remove trailing spaces in analyzer_experimental

pkg/analyzer_experimental/lib/src/generated/html.dart

 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
-
 library engine.html;
-
 import 'dart:collection';
 import 'java_core.dart';
 import 'java_engine.dart';
 import 'source.dart';
 import 'error.dart';
 import 'instrumentation.dart';
 import 'element.dart' show HtmlElementImpl;
-
-
 /**
  * Instances of the class {@code Token} represent a token that was scanned from the input. Each
  * token knows which token follows it, acting as the head of a linked list of tokens.
  * @coverage dart.engine.html
  */
 class Token {
-  
+
   /**
    * The offset from the beginning of the file to the first character in the token.
    */
   int _offset = 0;
-  
+
   /**
    * The previous token in the token stream.
    */
   Token _previous;
-  
+
   /**
    * The next token in the token stream.
    */
   Token _next;
-  
+
   /**
    * The type of the token.
    */
   TokenType _type;
-  
+
   /**
    * The lexeme represented by this token.
    */
   String _value;
-  
+
   /**
    * Initialize a newly created token.
    * @param type the token type (not {@code null})
    * @param offset the offset from the beginning of the file to the first character in the token
    */
   Token.con1(TokenType type, int offset) {
-    _jtd_constructor_154_impl(type, offset);
+    _jtd_constructor_155_impl(type, offset);
   }
-  _jtd_constructor_154_impl(TokenType type, int offset) {
-    _jtd_constructor_155_impl(type, offset, type.lexeme);
+  _jtd_constructor_155_impl(TokenType type, int offset) {
+    _jtd_constructor_156_impl(type, offset, type.lexeme);
   }
-  
+
   /**
    * Initialize a newly created token.
    * @param type the token type (not {@code null})
    * @param offset the offset from the beginning of the file to the first character in the token
    * @param value the lexeme represented by this token (not {@code null})
    */
   Token.con2(TokenType type2, int offset2, String value2) {
-    _jtd_constructor_155_impl(type2, offset2, value2);
+    _jtd_constructor_156_impl(type2, offset2, value2);
   }
-  _jtd_constructor_155_impl(TokenType type2, int offset2, String value2) {
+  _jtd_constructor_156_impl(TokenType type2, int offset2, String value2) {
     this._type = type2;
     this._value = StringUtilities.intern(value2);
     this._offset = offset2;
   }
-  
+
   /**
    * Return the offset from the beginning of the file to the character after last character of the
    * token.
    * @return the offset from the beginning of the file to the first character after last character
    * of the token
    */
   int get end => _offset + length;
-  
+
   /**
    * Return the number of characters in the node's source range.
    * @return the number of characters in the node's source range
    */
   int get length => lexeme.length;
-  
+
   /**
    * Return the lexeme that represents this token.
    * @return the lexeme (not {@code null})
    */
   String get lexeme => _value;
-  
+
   /**
    * Return the next token in the token stream.
    * @return the next token in the token stream
    */
   Token get next => _next;
-  
+
   /**
    * Return the offset from the beginning of the file to the first character in the token.
    * @return the offset from the beginning of the file to the first character in the token
    */
   int get offset => _offset;
-  
+
   /**
    * Return the previous token in the token stream.
    * @return the previous token in the token stream
    */
   Token get previous => _previous;
-  
+
   /**
    * Answer the token type for the receiver.
    * @return the token type (not {@code null})
    */
   TokenType get type => _type;
-  
+
   /**
    * Return {@code true} if this token is a synthetic token. A synthetic token is a token that was
    * introduced by the parser in order to recover from an error in the code. Synthetic tokens always
    * have a length of zero ({@code 0}).
    * @return {@code true} if this token is a synthetic token
    */
   bool isSynthetic() => length == 0;
-  
+
   /**
    * Set the next token in the token stream to the given token. This has the side-effect of setting
    * this token to be the previous token for the given token.
    * @param token the next token in the token stream
    * @return the token that was passed in
    */
   Token setNext(Token token) {
     _next = token;
     token.previous = this;
     return token;
   }
   String toString() => lexeme;
-  
+
   /**
    * Set the previous token in the token stream to the given token.
    * @param previous the previous token in the token stream
    */
   void set previous(Token previous2) {
     this._previous = previous2;
   }
 }
-
 /**
  * Instances of {@code HtmlParseResult} hold the result of parsing an HTML file.
  * @coverage dart.engine.html
  */
 class HtmlParseResult extends HtmlScanResult {
-  
+
   /**
    * The unit containing the parsed information (not {@code null}).
    */
   HtmlUnit _unit;
   HtmlParseResult(int modificationTime, Token token, List<int> lineStarts, HtmlUnit unit) : super(modificationTime, token, lineStarts) {
     this._unit = unit;
   }
-  
+
   /**
    * Answer the unit generated by parsing the source
    * @return the unit (not {@code null})
    */
   HtmlUnit get htmlUnit => _unit;
 }
-
 /**
  * Instances of the class {@code RecursiveXmlVisitor} implement an XML visitor that will recursively
  * visit all of the nodes in an XML structure. For example, using an instance of this class to visit
  * a {@link XmlTagNode} will also cause all of the contained {@link XmlAttributeNode}s and{@link XmlTagNode}s to be visited.
  * <p>
  * Subclasses that override a visit method must either invoke the overridden visit method or must
  * explicitly ask the visited node to visit its children. Failure to do so will cause the children
  * of the visited node to not be visited.
  * @coverage dart.engine.html
  */
 class RecursiveXmlVisitor<R> implements XmlVisitor<R> {
   R visitHtmlUnit(HtmlUnit node) {
     node.visitChildren(this);
     return null;
   }
   R visitXmlAttributeNode(XmlAttributeNode node) {
     node.visitChildren(this);
     return null;
   }
   R visitXmlTagNode(XmlTagNode node) {
     node.visitChildren(this);
     return null;
   }
 }
-
 /**
  * The abstract class {@code XmlNode} defines behavior common to all XML/HTML nodes.
  * @coverage dart.engine.html
  */
 abstract class XmlNode {
-  
+
   /**
    * The parent of the node, or {@code null} if the node is the root of an AST structure.
    */
   XmlNode _parent;
-  
+
   /**
    * Use the given visitor to visit this node.
    * @param visitor the visitor that will visit this node
    * @return the value returned by the visitor as a result of visiting this node
    */
   accept(XmlVisitor visitor);
-  
+
   /**
    * Return the first token included in this node's source range.
    * @return the first token or {@code null} if none
    */
   Token get beginToken;
-  
+
   /**
    * Return the offset of the character immediately following the last character of this node's
    * source range. This is equivalent to {@code node.getOffset() + node.getLength()}. For an html
    * unit this will be equal to the length of the unit's source.
    * @return the offset of the character just past the node's source range
    */
   int get end => offset + length;
-  
+
   /**
    * Return the last token included in this node's source range.
    * @return the last token or {@code null} if none
    */
   Token get endToken;
-  
+
   /**
    * Return the number of characters in the node's source range.
    * @return the number of characters in the node's source range
    */
   int get length {
     Token beginToken2 = beginToken;
     Token endToken2 = endToken;
     if (beginToken2 == null || endToken2 == null) {
       return -1;
     }
     return endToken2.offset + endToken2.length - beginToken2.offset;
   }
-  
+
   /**
    * Return the offset from the beginning of the file to the first character in the node's source
    * range.
    * @return the offset from the beginning of the file to the first character in the node's source
    * range
    */
   int get offset {
     Token beginToken2 = beginToken;
     if (beginToken2 == null) {
       return -1;
     }
     return beginToken.offset;
   }
-  
+
   /**
    * Return this node's parent node, or {@code null} if this node is the root of an AST structure.
    * <p>
    * Note that the relationship between an AST node and its parent node may change over the lifetime
    * of a node.
    * @return the parent of this node, or {@code null} if none
    */
   XmlNode get parent => _parent;
   String toString() {
     PrintStringWriter writer = new PrintStringWriter();
     accept(new ToSourceVisitor(writer));
     return writer.toString();
   }
-  
+
   /**
    * Use the given visitor to visit all of the children of this node. The children will be visited
    * in source order.
    * @param visitor the visitor that will be used to visit the children of this node
    */
   void visitChildren(XmlVisitor<Object> visitor);
-  
+
   /**
    * Make this node the parent of the given child nodes.
    * @param children the nodes that will become the children of this node
    * @return the nodes that were made children of this node
    */
   List becomeParentOf(List children) {
     if (children != null) {
       for (JavaIterator iter = new JavaIterator(children); iter.hasNext;) {
         XmlNode node = iter.next();
         node.parent = this;
       }
       return new List.from(children);
     }
     return children;
   }
-  
+
   /**
    * Make this node the parent of the given child node.
    * @param child the node that will become a child of this node
    * @return the node that was made a child of this node
    */
   XmlNode becomeParentOf2(XmlNode child) {
     if (child != null) {
       XmlNode node = child;
       node.parent = this;
     }
     return child;
   }
-  
+
   /**
    * Set the parent of this node to the given node.
    * @param newParent the node that is to be made the parent of this node
    */
   void set parent(XmlNode newParent) {
     _parent = newParent;
   }
 }
-
 /**
  * Instances of the class {@code SimpleXmlVisitor} implement an AST visitor that will do nothing
  * when visiting an AST node. It is intended to be a superclass for classes that use the visitor
  * pattern primarily as a dispatch mechanism (and hence don't need to recursively visit a whole
  * structure) and that only need to visit a small number of node types.
  */
 class SimpleXmlVisitor<R> implements XmlVisitor<R> {
   R visitHtmlUnit(HtmlUnit htmlUnit) => null;
   R visitXmlAttributeNode(XmlAttributeNode xmlAttributeNode) => null;
   R visitXmlTagNode(XmlTagNode xmlTagNode) => null;
 }
-
 /**
  * The abstract class {@code AbstractScanner} implements a scanner for HTML code. Subclasses are
  * required to implement the interface used to access the characters being scanned.
  * @coverage dart.engine.html
  */
 abstract class AbstractScanner {
   static List<String> _NO_PASS_THROUGH_ELEMENTS = <String> [];
-  
+
   /**
    * The source being scanned.
    */
   Source _source;
-  
+
   /**
    * The token pointing to the head of the linked list of tokens.
    */
   Token _tokens;
-  
+
   /**
    * The last token that was scanned.
    */
   Token _tail;
-  
+
   /**
    * A list containing the offsets of the first character of each line in the source code.
    */
   List<int> _lineStarts = new List<int>();
-  
+
   /**
    * An array of element tags for which the content between tags should be consider a single token.
    */
   List<String> _passThroughElements = _NO_PASS_THROUGH_ELEMENTS;
-  
+
   /**
    * Initialize a newly created scanner.
    * @param source the source being scanned
    */
   AbstractScanner(Source source) {
     this._source = source;
     _tokens = new Token.con1(TokenType.EOF, -1);
     _tokens.setNext(_tokens);
     _tail = _tokens;
     recordStartOfLine();
   }
-  
+
   /**
    * Return an array containing the offsets of the first character of each line in the source code.
    * @return an array containing the offsets of the first character of each line in the source code
    */
   List<int> get lineStarts => _lineStarts;
-  
+
   /**
    * Return the current offset relative to the beginning of the file. Return the initial offset if
    * the scanner has not yet scanned the source code, and one (1) past the end of the source code if
    * the source code has been scanned.
    * @return the current offset of the scanner in the source
    */
   int get offset;
-  
+
   /**
    * Answer the source being scanned.
    * @return the source or {@code null} if undefined
    */
   Source get source => _source;
-  
+
   /**
    * Set array of element tags for which the content between tags should be consider a single token.
    */
   void set passThroughElements(List<String> passThroughElements2) {
     this._passThroughElements = passThroughElements2 != null ? passThroughElements2 : _NO_PASS_THROUGH_ELEMENTS;
   }
-  
+
   /**
    * Scan the source code to produce a list of tokens representing the source.
    * @return the first token in the list of tokens that were produced
    */
   Token tokenize() {
     scan();
     appendEofToken();
     return firstToken();
   }
-  
+
   /**
    * Advance the current position and return the character at the new current position.
    * @return the character at the new current position
    */
   int advance();
-  
+
   /**
    * Return the substring of the source code between the start offset and the modified current
    * position. The current position is modified by adding the end delta.
    * @param start the offset to the beginning of the string, relative to the start of the file
    * @param endDelta the number of character after the current location to be included in the
    * string, or the number of characters before the current location to be excluded if the
    * offset is negative
    * @return the specified substring of the source code
    */
   String getString(int start, int endDelta);
-  
+
   /**
    * Return the character at the current position without changing the current position.
    * @return the character at the current position
    */
   int peek();
-  
+
   /**
    * Record the fact that we are at the beginning of a new line in the source.
    */
   void recordStartOfLine() {
     _lineStarts.add(offset);
   }
   void appendEofToken() {
     Token eofToken = new Token.con1(TokenType.EOF, offset);
     eofToken.setNext(eofToken);
     _tail = _tail.setNext(eofToken);
@@ skipping 149 matching lines @@
           c = advance();
         }
         emit3(TokenType.TAG, start, -1);
       } else {
         emit3(TokenType.TEXT, start, 0);
         c = advance();
       }
     }
   }
 }
-
 /**
  * Instances of {@code HtmlScanResult} hold the result of scanning an HTML file.
  * @coverage dart.engine.html
  */
 class HtmlScanResult {
-  
+
   /**
    * The time at which the contents of the source were last set.
    */
   int _modificationTime = 0;
-  
+
   /**
    * The first token in the token stream (not {@code null}).
    */
   Token _token;
-  
+
   /**
    * The line start information that was produced.
    */
   List<int> _lineStarts;
   HtmlScanResult(int modificationTime, Token token, List<int> lineStarts) {
     this._modificationTime = modificationTime;
     this._token = token;
     this._lineStarts = lineStarts;
   }
-  
+
   /**
    * Answer the line start information that was produced.
    * @return an array of line starts (not {@code null})
    */
   List<int> get lineStarts => _lineStarts;
-  
+
   /**
    * Return the time at which the contents of the source were last set.
    * @return the time at which the contents of the source were last set
    */
   int get modificationTime => _modificationTime;
-  
+
   /**
    * Answer the first token in the token stream.
    * @return the token (not {@code null})
    */
   Token get token => _token;
 }
-
 /**
  * Instances of the class {@code StringScanner} implement a scanner that reads from a string. The
  * scanning logic is in the superclass.
  * @coverage dart.engine.html
  */
 class StringScanner extends AbstractScanner {
-  
+
   /**
    * The string from which characters will be read.
    */
   String _string;
-  
+
   /**
    * The number of characters in the string.
    */
   int _stringLength = 0;
-  
+
   /**
    * The index, relative to the string, of the last character that was read.
    */
   int _charOffset = 0;
-  
+
   /**
    * Initialize a newly created scanner to scan the characters in the given string.
    * @param source the source being scanned
    * @param string the string from which characters will be read
    */
   StringScanner(Source source, String string) : super(source) {
     this._string = string;
     this._stringLength = string.length;
     this._charOffset = -1;
   }
   int get offset => _charOffset;
   void set offset(int offset2) {
     _charOffset = offset2;
   }
   int advance() {
     if (++_charOffset < _stringLength) {
       return _string.codeUnitAt(_charOffset);
     }
     _charOffset = _stringLength;
     return -1;
   }
   String getString(int start, int endDelta) => _string.substring(start, _charOffset + 1 + endDelta);
   int peek() {
     if (_charOffset + 1 < _stringLength) {
       return _string.codeUnitAt(_charOffset + 1);
     }
     return -1;
   }
 }
-
 /**
  * Instances of the class {@code CharBufferScanner} implement a scanner that reads from a character
  * buffer. The scanning logic is in the superclass.
  * @coverage dart.engine.html
  */
 class CharBufferScanner extends AbstractScanner {
-  
+
   /**
    * The buffer from which characters will be read.
    */
   CharSequence _buffer;
-  
+
   /**
    * The number of characters in the buffer.
    */
   int _bufferLength = 0;
-  
+
   /**
    * The index of the last character that was read.
    */
   int _charOffset = 0;
-  
+
   /**
    * Initialize a newly created scanner to scan the characters in the given character buffer.
    * @param source the source being scanned
    * @param buffer the buffer from which characters will be read
    */
   CharBufferScanner(Source source, CharSequence buffer) : super(source) {
     this._buffer = buffer;
     this._bufferLength = buffer.length();
     this._charOffset = -1;
   }
   int get offset => _charOffset;
   int advance() {
     if (++_charOffset < _bufferLength) {
       return _buffer.charAt(_charOffset);
     }
     _charOffset = _bufferLength;
     return -1;
   }
   String getString(int start, int endDelta) => _buffer.subSequence(start, _charOffset + 1 + endDelta).toString();
   int peek() {
     if (_charOffset + 1 < _bufferLength) {
       return _buffer.charAt(_charOffset + 1);
     }
     return -1;
   }
 }
-
 /**
  * Instances of the class {@code ToSourceVisitor} write a source representation of a visited XML
  * node (and all of it's children) to a writer.
  * @coverage dart.engine.html
  */
 class ToSourceVisitor implements XmlVisitor<Object> {
-  
+
   /**
    * The writer to which the source is to be written.
    */
   PrintWriter _writer;
-  
+
   /**
    * Initialize a newly created visitor to write source code representing the visited nodes to the
    * given writer.
    * @param writer the writer to which the source is to be written
    */
   ToSourceVisitor(PrintWriter writer) {
     this._writer = writer;
   }
   Object visitHtmlUnit(HtmlUnit node) {
     for (XmlTagNode child in node.tagNodes) {
@@ skipping 29 matching lines @@
     if (node.closingTag != null) {
       for (XmlTagNode child in node.tagNodes) {
         visit(child);
       }
       _writer.print("</");
       _writer.print(tagName);
       _writer.print(">");
     }
     return null;
   }
-  
+
   /**
    * Safely visit the given node.
    * @param node the node to be visited
    */
   void visit(XmlNode node) {
     if (node != null) {
       node.accept(this);
     }
   }
 }
-
 /**
  * The enumeration {@code TokenType} defines the types of tokens that can be returned by the
  * scanner.
  * @coverage dart.engine.html
  */
 class TokenType implements Comparable<TokenType> {
-  
+
   /**
    * The type of the token that marks the end of the input.
    */
   static final TokenType EOF = new TokenType_EOF('EOF', 0, "");
   static final TokenType EQ = new TokenType('EQ', 1, "=");
   static final TokenType GT = new TokenType('GT', 2, ">");
   static final TokenType LT_SLASH = new TokenType('LT_SLASH', 3, "</");
   static final TokenType LT = new TokenType('LT', 4, "<");
   static final TokenType SLASH_GT = new TokenType('SLASH_GT', 5, "/>");
   static final TokenType COMMENT = new TokenType('COMMENT', 6, null);
   static final TokenType DECLARATION = new TokenType('DECLARATION', 7, null);
   static final TokenType DIRECTIVE = new TokenType('DIRECTIVE', 8, null);
   static final TokenType STRING = new TokenType('STRING', 9, null);
   static final TokenType TAG = new TokenType('TAG', 10, null);
   static final TokenType TEXT = new TokenType('TEXT', 11, null);
   static final List<TokenType> values = [EOF, EQ, GT, LT_SLASH, LT, SLASH_GT, COMMENT, DECLARATION, DIRECTIVE, STRING, TAG, TEXT];
-  
+
   /// The name of this enum constant, as declared in the enum declaration.
   final String name;
-  
+
   /// The position in the enum declaration.
   final int ordinal;
-  
+
   /**
    * The lexeme that defines this type of token, or {@code null} if there is more than one possible
    * lexeme for this type of token.
    */
   String _lexeme;
   TokenType(this.name, this.ordinal, String lexeme) {
     this._lexeme = lexeme;
   }
-  
+
   /**
    * Return the lexeme that defines this type of token, or {@code null} if there is more than one
    * possible lexeme for this type of token.
    * @return the lexeme that defines this type of token
    */
   String get lexeme => _lexeme;
   int compareTo(TokenType other) => ordinal - other.ordinal;
   String toString() => name;
 }
 class TokenType_EOF extends TokenType {
   TokenType_EOF(String name, int ordinal, String arg0) : super(name, ordinal, arg0);
   String toString() => "-eof-";
 }
-
 /**
  * Instances of {@code XmlAttributeNode} represent name/value pairs owned by an {@link XmlTagNode}.
  * @coverage dart.engine.html
  */
 class XmlAttributeNode extends XmlNode {
   Token _name;
   Token _equals;
   Token _value;
-  
+
   /**
    * Construct a new instance representing an XML attribute.
    * @param name the name token (not {@code null}). This may be a zero length token if the attribute
    * is badly formed.
    * @param equals the equals sign or {@code null} if none
    * @param value the value token (not {@code null})
    */
   XmlAttributeNode(Token name, Token equals, Token value) {
     this._name = name;
     this._equals = equals;
     this._value = value;
   }
   accept(XmlVisitor visitor) => visitor.visitXmlAttributeNode(this);
   Token get beginToken => _name;
   Token get endToken => _value;
-  
+
   /**
    * Answer the equals sign token that appears between the name and value tokens. This may be{@code null} if the attribute is badly formed.
    * @return the token or {@code null} if there is no equals sign between the name and value
    */
   Token get equals => _equals;
-  
+
   /**
    * Answer the attribute name. This may be a zero length token if the attribute is badly formed.
    * @return the name (not {@code null})
    */
   Token get name => _name;
-  
+
   /**
    * Answer the lexeme for the value token without the leading and trailing quotes.
    * @return the text or {@code null} if the value is not specified
    */
   String get text {
     if (_value == null) {
       return null;
     }
     String text = _value.lexeme;
     int len = text.length;
     if (len > 0) {
       if (text.codeUnitAt(0) == 0x22) {
         if (len > 1 && text.codeUnitAt(len - 1) == 0x22) {
           return text.substring(1, len - 1);
         } else {
           return text.substring(1);
         }
       } else if (text.codeUnitAt(0) == 0x27) {
         if (len > 1 && text.codeUnitAt(len - 1) == 0x27) {
           return text.substring(1, len - 1);
         } else {
           return text.substring(1);
         }
       }
     }
     return text;
   }
-  
+
   /**
    * Answer the attribute value. A properly formed value will start and end with matching quote
    * characters, but the value returned may not be properly formed.
    * @return the value or {@code null} if this represents a badly formed attribute
    */
   Token get value => _value;
   void visitChildren(XmlVisitor<Object> visitor) {
   }
 }
-
 /**
  * The interface {@code XmlVisitor} defines the behavior of objects that can be used to visit an{@link XmlNode} structure.
  * @coverage dart.engine.html
  */
 abstract class XmlVisitor<R> {
   R visitHtmlUnit(HtmlUnit htmlUnit);
   R visitXmlAttributeNode(XmlAttributeNode xmlAttributeNode);
   R visitXmlTagNode(XmlTagNode xmlTagNode);
 }
-
 /**
  * Instances of {@code HtmlScanner} receive and scan HTML content from a {@link Source}.<br/>
  * For example, the following code scans HTML source and returns the result:
  * <pre>
  * HtmlScanner scanner = new HtmlScanner(source);
  * source.getContents(scanner);
  * return scanner.getResult();
  * </pre>
  * @coverage dart.engine.html
  */
 class HtmlScanner implements Source_ContentReceiver {
   List<String> _SCRIPT_TAG = <String> ["script"];
-  
+
   /**
    * The source being scanned (not {@code null})
    */
   Source _source;
-  
+
   /**
    * The time at which the contents of the source were last set.
    */
   int _modificationTime = 0;
-  
+
   /**
    * The scanner used to scan the source
    */
   AbstractScanner _scanner;
-  
+
   /**
    * The first token in the token stream.
    */
   Token _token;
-  
+
   /**
    * Construct a new instance to scan the specified source.
    * @param source the source to be scanned (not {@code null})
    */
   HtmlScanner(Source source) {
     this._source = source;
   }
   void accept(CharBuffer contents, int modificationTime2) {
     this._modificationTime = modificationTime2;
     _scanner = new CharBufferScanner(_source, contents);
     _scanner.passThroughElements = _SCRIPT_TAG;
     _token = _scanner.tokenize();
   }
   void accept2(String contents, int modificationTime2) {
     this._modificationTime = modificationTime2;
     _scanner = new StringScanner(_source, contents);
     _scanner.passThroughElements = _SCRIPT_TAG;
     _token = _scanner.tokenize();
   }
-  
+
   /**
    * Answer the result of scanning the source
    * @return the result (not {@code null})
    */
   HtmlScanResult get result => new HtmlScanResult(_modificationTime, _token, _scanner.lineStarts);
 }
-
 /**
  * Instances of the class {@code XmlParser} are used to parse tokens into a AST structure comprised
  * of {@link XmlNode}s.
  * @coverage dart.engine.html
  */
 class XmlParser {
-  
+
   /**
    * The source being parsed.
    */
   Source _source;
-  
+
   /**
    * The next token to be parsed.
    */
   Token _currentToken;
-  
+
   /**
    * Construct a parser for the specified source.
    * @param source the source being parsed
    */
   XmlParser(Source source) {
     this._source = source;
   }
-  
+
   /**
    * Answer the source being parsed.
    * @return the source
    */
   Source get source => _source;
-  
+
   /**
    * Answer {@code true} if the specified tag is self closing and thus should never have content or
    * child tag nodes.
    * @param tag the tag (not {@code null})
    * @return {@code true} if self closing
    */
   bool isSelfClosing(Token tag) => false;
-  
+
   /**
    * Parse the entire token stream and in the process, advance the current token to the end of the
    * token stream.
    * @return the list of tag nodes found (not {@code null}, contains no {@code null})
    */
   List<XmlTagNode> parseTopTagNodes(Token firstToken) {
     _currentToken = firstToken;
     List<XmlTagNode> tagNodes = new List<XmlTagNode>();
     while (true) {
       while (true) {
         if (_currentToken.type == TokenType.LT) {
           tagNodes.add(parseTagNode());
         } else if (_currentToken.type == TokenType.DECLARATION || _currentToken.type == TokenType.DIRECTIVE || _currentToken.type == TokenType.COMMENT) {
           _currentToken = _currentToken.next;
         } else if (_currentToken.type == TokenType.EOF) {
           return tagNodes;
         } else {
           reportUnexpectedToken();
           _currentToken = _currentToken.next;
         }
         break;
       }
     }
   }
-  
+
   /**
    * Answer the current token.
    * @return the current token
    */
   Token get currentToken => _currentToken;
-  
+
   /**
    * Insert a synthetic token of the specified type before the current token
    * @param type the type of token to be inserted (not {@code null})
    * @return the synthetic token that was inserted (not {@code null})
    */
   Token insertSyntheticToken(TokenType type) {
     Token token = new Token.con2(type, _currentToken.offset, "");
     _currentToken.previous.setNext(token);
     token.setNext(_currentToken);
     return token;
   }
-  
+
   /**
    * Parse the token stream for an attribute. This method advances the current token over the
    * attribute, but should not be called if the {@link #currentToken} is not {@link TokenType#TAG}.
    * @return the attribute (not {@code null})
    */
   XmlAttributeNode parseAttribute() {
     Token name = _currentToken;
     _currentToken = _currentToken.next;
     Token equals;
     if (identical(_currentToken.type, TokenType.EQ)) {
       equals = _currentToken;
       _currentToken = _currentToken.next;
     } else {
       reportUnexpectedToken();
       equals = insertSyntheticToken(TokenType.EQ);
     }
     Token value;
     if (identical(_currentToken.type, TokenType.STRING)) {
       value = _currentToken;
       _currentToken = _currentToken.next;
     } else {
       reportUnexpectedToken();
       value = insertSyntheticToken(TokenType.STRING);
     }
     return new XmlAttributeNode(name, equals, value);
   }
-  
+
   /**
    * Parse the stream for a sequence of attributes. This method advances the current token to the
    * next {@link TokenType#GT}, {@link TokenType#SLASH_GT}, or {@link TokenType#EOF}.
    * @return a collection of zero or more attributes (not {@code null}, contains no {@code null}s)
    */
   List<XmlAttributeNode> parseAttributes() {
     TokenType type2 = _currentToken.type;
     if (identical(type2, TokenType.GT) || identical(type2, TokenType.SLASH_GT) || identical(type2, TokenType.EOF)) {
       return XmlTagNode.NO_ATTRIBUTES;
     }
     List<XmlAttributeNode> attributes = new List<XmlAttributeNode>();
     while (true) {
       while (true) {
         if (_currentToken.type == TokenType.GT || _currentToken.type == TokenType.SLASH_GT || _currentToken.type == TokenType.EOF) {
           return attributes;
         } else if (_currentToken.type == TokenType.TAG) {
           attributes.add(parseAttribute());
         } else {
           reportUnexpectedToken();
           _currentToken = _currentToken.next;
         }
         break;
       }
     }
   }
-  
+
   /**
    * Parse the stream for a sequence of tag nodes existing within a parent tag node. This method
    * advances the current token to the next {@link TokenType#LT_SLASH} or {@link TokenType#EOF}.
    * @return a list of nodes (not {@code null}, contains no {@code null}s)
    */
   List<XmlTagNode> parseChildTagNodes() {
     TokenType type2 = _currentToken.type;
     if (identical(type2, TokenType.LT_SLASH) || identical(type2, TokenType.EOF)) {
       return XmlTagNode.NO_TAG_NODES;
     }
     List<XmlTagNode> nodes = new List<XmlTagNode>();
     while (true) {
       while (true) {
         if (_currentToken.type == TokenType.LT) {
           nodes.add(parseTagNode());
         } else if (_currentToken.type == TokenType.LT_SLASH || _currentToken.type == TokenType.EOF) {
           return nodes;
         } else if (_currentToken.type == TokenType.COMMENT) {
           _currentToken = _currentToken.next;
         } else {
           reportUnexpectedToken();
           _currentToken = _currentToken.next;
         }
         break;
       }
     }
   }
-  
+
   /**
    * Parse the token stream for the next tag node. This method advances current token over the
    * parsed tag node, but should only be called if the current token is {@link TokenType#LT}
    * @return the tag node or {@code null} if none found
    */
   XmlTagNode parseTagNode() {
     Token nodeStart = _currentToken;
     _currentToken = _currentToken.next;
     Token tag;
     if (identical(_currentToken.type, TokenType.TAG)) {
@@ skipping 35 matching lines @@
     Token nodeEnd;
     if (identical(_currentToken.type, TokenType.GT)) {
       nodeEnd = _currentToken;
       _currentToken = _currentToken.next;
     } else {
       reportUnexpectedToken();
       nodeEnd = insertSyntheticToken(TokenType.GT);
     }
     return new XmlTagNode(nodeStart, tag, attributes, attributeEnd, tagNodes, contentEnd, closingTag, nodeEnd);
   }
-  
+
   /**
    * Report the current token as unexpected
    */
   void reportUnexpectedToken() {
   }
 }
-
 /**
  * Instances of {@code XmlTagNode} represent XML or HTML elements such as {@code <p>} and{@code <body foo="bar"> ... </body>}.
  * @coverage dart.engine.html
  */
 class XmlTagNode extends XmlNode {
-  
+
   /**
    * Constant representing empty list of attributes.
    */
   static List<XmlAttributeNode> NO_ATTRIBUTES = new UnmodifiableListView(new List<XmlAttributeNode>());
-  
+
   /**
    * Constant representing empty list of tag nodes.
    */
   static List<XmlTagNode> NO_TAG_NODES = new UnmodifiableListView(new List<XmlTagNode>());
-  
+
   /**
    * The starting {@link TokenType#LT} token (not {@code null}).
    */
   Token _nodeStart;
-  
+
   /**
    * The {@link TokenType#TAG} token after the starting '&lt;' (not {@code null}).
    */
   Token _tag;
-  
+
   /**
    * The attributes contained by the receiver (not {@code null}, contains no {@code null}s).
    */
   List<XmlAttributeNode> _attributes;
-  
+
   /**
    * The {@link TokenType#GT} or {@link TokenType#SLASH_GT} token after the attributes (not{@code null}). The token may be the same token as {@link #nodeEnd} if there are no child{@link #tagNodes}.
    */
   Token _attributeEnd;
-  
+
   /**
    * The tag nodes contained in the receiver (not {@code null}, contains no {@code null}s).
    */
   List<XmlTagNode> _tagNodes;
-  
+
   /**
    * The token (not {@code null}) after the content, which may be
    * <ul>
    * <li>(1) {@link TokenType#LT_SLASH} for nodes with open and close tags, or</li>
    * <li>(2) the {@link TokenType#LT} nodeStart of the next sibling node if this node is self
    * closing or the attributeEnd is {@link TokenType#SLASH_GT}, or</li>
    * <li>(3) {@link TokenType#EOF} if the node does not have a closing tag and is the last node in
    * the stream {@link TokenType#LT_SLASH} token after the content, or {@code null} if there is no
    * content and the attributes ended with {@link TokenType#SLASH_GT}.</li>
    * </ul>
    */
   Token _contentEnd;
-  
+
   /**
    * The closing {@link TokenType#TAG} after the child elements or {@code null} if there is no
    * content and the attributes ended with {@link TokenType#SLASH_GT}
    */
   Token _closingTag;
-  
+
   /**
    * The ending {@link TokenType#GT} or {@link TokenType#SLASH_GT} token (not {@code null}).
    */
   Token _nodeEnd;
-  
+
   /**
    * Construct a new instance representing an XML or HTML element
    * @param nodeStart the starting {@link TokenType#LT} token (not {@code null})
    * @param tag the {@link TokenType#TAG} token after the starting '&lt;' (not {@code null}).
    * @param attributes the attributes associated with this element or {@link #NO_ATTRIBUTES} (not{@code null}, contains no {@code null}s)
    * @param attributeEnd The {@link TokenType#GT} or {@link TokenType#SLASH_GT} token after the
    * attributes (not {@code null}). The token may be the same token as {@link #nodeEnd} if
    * there are no child {@link #tagNodes}.
    * @param tagNodes child tag nodes of the receiver or {@link #NO_TAG_NODES} (not {@code null},
    * contains no {@code null}s)
@@ skipping 13 matching lines @@
     this._nodeStart = nodeStart;
     this._tag = tag;
     this._attributes = becomeParentOfEmpty(attributes, NO_ATTRIBUTES);
     this._attributeEnd = attributeEnd;
     this._tagNodes = becomeParentOfEmpty(tagNodes, NO_TAG_NODES);
     this._contentEnd = contentEnd;
     this._closingTag = closingTag;
     this._nodeEnd = nodeEnd;
   }
   accept(XmlVisitor visitor) => visitor.visitXmlTagNode(this);
-  
+
   /**
    * Answer the attribute with the specified name.
    * @param name the attribute name
    * @return the attribute or {@code null} if no matching attribute is found
    */
   XmlAttributeNode getAttribute(String name2) {
     for (XmlAttributeNode attribute in _attributes) {
       if (attribute.name.lexeme == name2) {
         return attribute;
       }
     }
     return null;
   }
-  
+
   /**
    * The {@link TokenType#GT} or {@link TokenType#SLASH_GT} token after the attributes (not{@code null}). The token may be the same token as {@link #nodeEnd} if there are no child{@link #tagNodes}.
    * @return the token (not {@code null})
    */
   Token get attributeEnd => _attributeEnd;
-  
+
   /**
    * Answer the receiver's attributes. Callers should not manipulate the returned list to edit the
    * AST structure.
    * @return the attributes (not {@code null}, contains no {@code null}s)
    */
   List<XmlAttributeNode> get attributes => _attributes;
-  
+
   /**
    * Find the attribute with the given name (see {@link #getAttribute(String)} and answer the lexeme
    * for the attribute's value token without the leading and trailing quotes (see{@link XmlAttributeNode#getText()}).
    * @param name the attribute name
    * @return the attribute text or {@code null} if no matching attribute is found
    */
   String getAttributeText(String name) {
     XmlAttributeNode attribute = getAttribute(name);
     return attribute != null ? attribute.text : null;
   }
   Token get beginToken => _nodeStart;
-  
+
   /**
    * The the closing {@link TokenType#TAG} after the child elements or {@code null} if there is no
    * content and the attributes ended with {@link TokenType#SLASH_GT}
    * @return the closing tag or {@code null}
    */
   Token get closingTag => _closingTag;
-  
+
   /**
    * Answer a string representing the content contained in the receiver. This includes the textual
    * representation of any child tag nodes ({@link #getTagNodes()}). Whitespace between '&lt;',
    * '&lt;/', and '>', '/>' is discarded, but all other whitespace is preserved.
    * @return the content (not {@code null})
    */
   String get content {
     Token token = _attributeEnd.next;
     if (identical(token, _contentEnd)) {
       return "";
     }
     String content = token.lexeme;
     token = token.next;
     if (identical(token, _contentEnd)) {
       return content;
     }
     JavaStringBuilder buffer = new JavaStringBuilder();
     while (token != _contentEnd) {
       buffer.append(token.lexeme);
       token = token.next;
     }
     return buffer.toString();
   }
-  
+
   /**
    * Answer the token (not {@code null}) after the content, which may be
    * <ul>
    * <li>(1) {@link TokenType#LT_SLASH} for nodes with open and close tags, or</li>
    * <li>(2) the {@link TokenType#LT} nodeStart of the next sibling node if this node is self
    * closing or the attributeEnd is {@link TokenType#SLASH_GT}, or</li>
    * <li>(3) {@link TokenType#EOF} if the node does not have a closing tag and is the last node in
    * the stream {@link TokenType#LT_SLASH} token after the content, or {@code null} if there is no
    * content and the attributes ended with {@link TokenType#SLASH_GT}.</li>
    * </ul>
@@ skipping 14 matching lines @@
       return _tagNodes[_tagNodes.length - 1].endToken;
     }
     if (_attributeEnd != null) {
       return _attributeEnd;
     }
     if (!_attributes.isEmpty) {
       return _attributes[_attributes.length - 1].endToken;
     }
     return _tag;
   }
-  
+
   /**
    * Answer the ending {@link TokenType#GT} or {@link TokenType#SLASH_GT} token.
    * @return the token (not {@code null})
    */
   Token get nodeEnd => _nodeEnd;
-  
+
   /**
    * Answer the starting {@link TokenType#LT} token.
    * @return the token (not {@code null})
    */
   Token get nodeStart => _nodeStart;
-  
+
   /**
    * Answer the {@link TokenType#TAG} token after the starting '&lt;'.
    * @return the token (not {@code null})
    */
   Token get tag => _tag;
-  
+
   /**
    * Answer the tag nodes contained in the receiver. Callers should not manipulate the returned list
    * to edit the AST structure.
    * @return the children (not {@code null}, contains no {@code null}s)
    */
   List<XmlTagNode> get tagNodes => _tagNodes;
   void visitChildren(XmlVisitor<Object> visitor) {
     for (XmlAttributeNode node in _attributes) {
       node.accept(visitor);
     }
     for (XmlTagNode node in _tagNodes) {
       node.accept(visitor);
     }
   }
-  
+
   /**
    * Same as {@link #becomeParentOf(List)}, but returns given "ifEmpty" if "children" is empty
    */
   List becomeParentOfEmpty(List children, List ifEmpty) {
     if (children != null && children.isEmpty) {
       return ifEmpty;
     }
     return becomeParentOf(children);
   }
 }
-
 /**
  * Instances of the class {@code HtmlParser} are used to parse tokens into a AST structure comprised
  * of {@link XmlNode}s.
  * @coverage dart.engine.html
  */
 class HtmlParser extends XmlParser {
   static Set<String> SELF_CLOSING = new Set<String>();
-  
+
   /**
    * Construct a parser for the specified source.
    * @param source the source being parsed
    */
   HtmlParser(Source source) : super(source) {
   }
-  
+
   /**
    * Parse the tokens specified by the given scan result.
    * @param scanResult the result of scanning an HTML source (not {@code null})
    * @return the parse result (not {@code null})
    */
   HtmlParseResult parse(HtmlScanResult scanResult) {
     Token firstToken = scanResult.token;
     List<XmlTagNode> tagNodes = parseTopTagNodes(firstToken);
     HtmlUnit unit = new HtmlUnit(firstToken, tagNodes, currentToken);
     return new HtmlParseResult(scanResult.modificationTime, firstToken, scanResult.lineStarts, unit);
   }
-  
+
   /**
    * Scan then parse the specified source.
    * @param source the source to be scanned and parsed (not {@code null})
    * @return the parse result (not {@code null})
    */
   HtmlParseResult parse2(Source source) {
     HtmlScanner scanner = new HtmlScanner(source);
     source.getContents(scanner);
     return parse(scanner.result);
   }
   bool isSelfClosing(Token tag) => SELF_CLOSING.contains(tag.lexeme);
 }
-
 /**
  * Instances of the class {@code HtmlUnit} represent the contents of an HTML file.
  * @coverage dart.engine.html
  */
 class HtmlUnit extends XmlNode {
-  
+
   /**
    * The first token in the token stream that was parsed to form this HTML unit.
    */
   Token _beginToken;
-  
+
   /**
    * The last token in the token stream that was parsed to form this compilation unit. This token
    * should always have a type of {@link TokenType.EOF}.
    */
   Token _endToken;
-  
+
   /**
    * The tag nodes contained in the receiver (not {@code null}, contains no {@code null}s).
    */
   List<XmlTagNode> _tagNodes;
-  
+
   /**
    * The element associated with this HTML unit or {@code null} if the receiver is not resolved.
    */
   HtmlElementImpl _element;
-  
+
   /**
    * Construct a new instance representing the content of an HTML file.
    * @param beginToken the first token in the file (not {@code null})
    * @param tagNodes child tag nodes of the receiver (not {@code null}, contains no {@code null}s)
    * @param endToken the last token in the token stream which should be of type{@link TokenType.EOF}
    */
   HtmlUnit(Token beginToken, List<XmlTagNode> tagNodes, Token endToken) {
     this._beginToken = beginToken;
     this._tagNodes = becomeParentOf(tagNodes);
     this._endToken = endToken;
   }
   accept(XmlVisitor visitor) => visitor.visitHtmlUnit(this);
   Token get beginToken => _beginToken;
-  
+
   /**
    * Return the element associated with this HTML unit.
    * @return the element or {@code null} if the receiver is not resolved
    */
   HtmlElementImpl get element => _element;
   Token get endToken => _endToken;
-  
+
   /**
    * Answer the tag nodes contained in the receiver. Callers should not manipulate the returned list
    * to edit the AST structure.
    * @return the children (not {@code null}, contains no {@code null}s)
    */
   List<XmlTagNode> get tagNodes => _tagNodes;
-  
+
   /**
    * Set the element associated with this HTML unit.
    * @param element the element
    */
   void set element(HtmlElementImpl element2) {
     this._element = element2;
   }
   void visitChildren(XmlVisitor<Object> visitor) {
     for (XmlTagNode node in _tagNodes) {
       node.accept(visitor);
     }
   }
 }