org.fife.ui.rsyntaxtextarea.modes
Class DtdTokenMaker

java.lang.Object
  org.fife.ui.rsyntaxtextarea.TokenMakerBase
      org.fife.ui.rsyntaxtextarea.AbstractJFlexTokenMaker
          org.fife.ui.rsyntaxtextarea.modes.DtdTokenMaker

All Implemented Interfaces:

TokenMaker

public class DtdTokenMaker
extends AbstractJFlexTokenMaker

Scanner for DTD files. This implementation was created using JFlex 1.4.1; however, the generated file was modified for performance. Memory allocation needs to be almost completely removed to be competitive with the handwritten lexers (subclasses of AbstractTokenMaker, so this class has been modified so that Strings are never allocated (via yytext()), and the scanner never has to worry about refilling its buffer (needlessly copying chars around). We can achieve this because RText always scans exactly 1 line of tokens at a time, and hands the scanner this line as an array of characters (a Segment really). Since tokens contain pointers to char arrays instead of Strings holding their contents, there is no need for allocating new memory for Strings.

The actual algorithm generated for scanning has, of course, not been modified.

If you wish to regenerate this file yourself, keep in mind the following:

• The generated XMLTokenMaker.java file will contain two definitions of both zzRefill and yyreset. You should hand-delete the second of each definition (the ones generated by the lexer), as these generated methods modify the input buffer, which we'll never have to do.
• You should also change the declaration/definition of zzBuffer to NOT be initialized. This is a needless memory allocation for us since we will be pointing the array somewhere else anyway.
• You should NOT call yylex() on the generated scanner directly; rather, you should use getTokenList as you would with any other TokenMaker instance.

Field Summary

static int	COMMENT
static int	INTAG_ATTLIST
static int	INTAG_ELEMENT
static int	INTAG_START lexical states
static int	INTERNAL_IN_COMMENT Token type specific to XMLTokenMaker denoting a line ending with an unclosed comment.
static int	INTERNAL_INTAG_ATTLIST Token type specific to XMLTokenMaker denoting a line ending with an unclosed, locally-defined DTD in a DOCTYPE element.
static int	INTERNAL_INTAG_ELEMENT Token type specific to XMLTokenMaker denoting a line ending with an unclosed DOCTYPE element.
static int	INTERNAL_INTAG_START Token type specific to XMLTokenMaker denoting a line ending with an unclosed XML tag; thus a new line is beginning still inside of the tag.
static int	YYEOF This character denotes the end of file
static int	YYINITIAL

Fields inherited from class org.fife.ui.rsyntaxtextarea.AbstractJFlexTokenMaker

offsetShift, s, start

Fields inherited from class org.fife.ui.rsyntaxtextarea.TokenMakerBase

currentToken, firstToken, previousToken

Constructor Summary

DtdTokenMaker()
Constructor.

DtdTokenMaker(java.io.InputStream in)
Creates a new scanner.

DtdTokenMaker(java.io.Reader in)
Creates a new scanner There is also a java.io.InputStream version of this constructor.

Method Summary

void	addToken(char[] array, int start, int end, int tokenType, int startOffset) Adds the token specified to the current linked list of tokens.
boolean	getMarkOccurrencesOfTokenType(int type) Always returns false, as you never want "mark occurrences" working in XML files.
Token	getTokenList(javax.swing.text.Segment text, int initialTokenType, int startOffset) Returns the first token in the linked list of tokens generated from text.
void	yybegin(int newState) Enters a new lexical state
char	yycharat(int pos) Returns the character at position pos from the matched text.
void	yyclose() Closes the input stream.
int	yylength() Returns the length of the matched text region.
Token	yylex() Resumes scanning until the next regular expression is matched, the end of input is encountered or an I/O-Error occurs.
void	yypushback(int number) Pushes the specified amount of characters back into the input stream.
void	yyreset(java.io.Reader reader) Resets the scanner to read from a new input stream.
int	yystate() Returns the current lexical state.
java.lang.String	yytext() Returns the text matched by the current regular expression.

Methods inherited from class org.fife.ui.rsyntaxtextarea.AbstractJFlexTokenMaker

yybegin

Methods inherited from class org.fife.ui.rsyntaxtextarea.TokenMakerBase

addNullToken, addToken, addToken, createOccurrenceMarker, getClosestStandardTokenTypeForInternalType, getCurlyBracesDenoteCodeBlocks, getInsertBreakAction, getLanguageIndex, getLastTokenTypeOnLine, getLineCommentStartAndEnd, getOccurrenceMarker, getShouldIndentNextLineAfter, isIdentifierChar, isMarkupLanguage, resetTokenList, setLanguageIndex

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

YYEOF

public static final int YYEOF

This character denotes the end of file

See Also:

Constant Field Values

INTAG_START

public static final int INTAG_START

lexical states

See Also:

Constant Field Values

INTAG_ELEMENT

public static final int INTAG_ELEMENT

See Also:

Constant Field Values

YYINITIAL

public static final int YYINITIAL

See Also:

Constant Field Values

INTAG_ATTLIST

public static final int INTAG_ATTLIST

See Also:

Constant Field Values

COMMENT

public static final int COMMENT

See Also:

Constant Field Values

INTERNAL_INTAG_START

public static final int INTERNAL_INTAG_START

Token type specific to XMLTokenMaker denoting a line ending with an unclosed XML tag; thus a new line is beginning still inside of the tag.

See Also:

Constant Field Values

INTERNAL_INTAG_ELEMENT

public static final int INTERNAL_INTAG_ELEMENT

Token type specific to XMLTokenMaker denoting a line ending with an unclosed DOCTYPE element.

See Also:

Constant Field Values

INTERNAL_INTAG_ATTLIST

public static final int INTERNAL_INTAG_ATTLIST

Token type specific to XMLTokenMaker denoting a line ending with an unclosed, locally-defined DTD in a DOCTYPE element.

See Also:

Constant Field Values

INTERNAL_IN_COMMENT

public static final int INTERNAL_IN_COMMENT

Token type specific to XMLTokenMaker denoting a line ending with an unclosed comment. The state to return to when this comment ends is embedded in the token type as well.

See Also:

Constant Field Values

Constructor Detail

DtdTokenMaker

public DtdTokenMaker()

Constructor. This must be here because JFlex does not generate a no-parameter constructor.

DtdTokenMaker

public DtdTokenMaker(java.io.Reader in)

Creates a new scanner There is also a java.io.InputStream version of this constructor.

Parameters:

in - the java.io.Reader to read input from.

DtdTokenMaker

public DtdTokenMaker(java.io.InputStream in)

Creates a new scanner. There is also java.io.Reader version of this constructor.

Parameters:

in - the java.io.Inputstream to read input from.

Method Detail

addToken

public void addToken(char[] array,
                     int start,
                     int end,
                     int tokenType,
                     int startOffset)

Adds the token specified to the current linked list of tokens.

Specified by:

addToken in interface TokenMaker

Overrides:

addToken in class TokenMakerBase

Parameters:

array - The character array.

start - The starting offset in the array.

end - The ending offset in the array.

tokenType - The token's type.

startOffset - The offset in the document at which this token occurs.

getMarkOccurrencesOfTokenType

public boolean getMarkOccurrencesOfTokenType(int type)

Always returns false, as you never want "mark occurrences" working in XML files.

Specified by:

getMarkOccurrencesOfTokenType in interface TokenMaker

Overrides:

getMarkOccurrencesOfTokenType in class TokenMakerBase

Parameters:

type - The token type.

Returns:

Whether tokens of this type should have "mark occurrences" enabled.

getTokenList

public Token getTokenList(javax.swing.text.Segment text,
                          int initialTokenType,
                          int startOffset)

Returns the first token in the linked list of tokens generated from text. This method must be implemented by subclasses so they can correctly implement syntax highlighting.

Parameters:

text - The text from which to get tokens.

initialTokenType - The token type we should start with.

startOffset - The offset into the document at which text starts.

Returns:

The first Token in a linked list representing the syntax highlighted text.

yyreset

public final void yyreset(java.io.Reader reader)

Resets the scanner to read from a new input stream. Does not close the old reader. All internal variables are reset, the old input stream cannot be reused (internal buffer is discarded and lost). Lexical state is set to YY_INITIAL.

Parameters:

reader - the new input stream

yyclose

public final void yyclose()
                   throws java.io.IOException

Closes the input stream.

Throws:

java.io.IOException

yystate

public final int yystate()

Returns the current lexical state.

yybegin

public final void yybegin(int newState)

Enters a new lexical state

Specified by:

yybegin in class AbstractJFlexTokenMaker

Parameters:

newState - the new lexical state

yytext

public final java.lang.String yytext()

Returns the text matched by the current regular expression.

yycharat

public final char yycharat(int pos)

Returns the character at position pos from the matched text. It is equivalent to yytext().charAt(pos), but faster

Parameters:

pos - the position of the character to fetch. A value from 0 to yylength()-1.

Returns:

the character at position pos

yylength

public final int yylength()

Returns the length of the matched text region.

yypushback

public void yypushback(int number)

Pushes the specified amount of characters back into the input stream. They will be read again by then next call of the scanning method

Parameters:

number - the number of characters to be read again. This number must not be greater than yylength()!

yylex

public Token yylex()
            throws java.io.IOException

Resumes scanning until the next regular expression is matched, the end of input is encountered or an I/O-Error occurs.

Returns:

the next token

Throws:

java.io.IOException - if any I/O-Error occurs