public class DtdTokenMaker extends AbstractJFlexTokenMaker
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:
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.yylex()
on the generated scanner
directly; rather, you should use getTokenList
as you would
with any other TokenMaker
instance.Modifier and Type | Field and Description |
---|---|
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 |
offsetShift, s, start
currentToken, firstToken, previousToken
Constructor and Description |
---|
DtdTokenMaker()
Constructor.
|
DtdTokenMaker(InputStream in)
Creates a new scanner.
|
DtdTokenMaker(Reader in)
Creates a new scanner
There is also a java.io.InputStream version of this constructor.
|
Modifier and Type | Method and Description |
---|---|
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(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(Reader reader)
Resets the scanner to read from a new input stream.
|
int |
yystate()
Returns the current lexical state.
|
String |
yytext()
Returns the text matched by the current regular expression.
|
yybegin
addNullToken, addToken, addToken, createOccurrenceMarker, getClosestStandardTokenTypeForInternalType, getCurlyBracesDenoteCodeBlocks, getInsertBreakAction, getLanguageIndex, getLastTokenTypeOnLine, getLineCommentStartAndEnd, getOccurrenceMarker, getShouldIndentNextLineAfter, isIdentifierChar, isMarkupLanguage, resetTokenList, setLanguageIndex
public static final int YYEOF
public static final int INTAG_START
public static final int INTAG_ELEMENT
public static final int YYINITIAL
public static final int INTAG_ATTLIST
public static final int COMMENT
public static final int INTERNAL_INTAG_START
public static final int INTERNAL_INTAG_ELEMENT
public static final int INTERNAL_INTAG_ATTLIST
public static final int INTERNAL_IN_COMMENT
public DtdTokenMaker()
public DtdTokenMaker(Reader in)
in
- the java.io.Reader to read input from.public DtdTokenMaker(InputStream in)
in
- the java.io.Inputstream to read input from.public void addToken(char[] array, int start, int end, int tokenType, int startOffset)
addToken
in interface TokenMaker
addToken
in class TokenMakerBase
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.public boolean getMarkOccurrencesOfTokenType(int type)
getMarkOccurrencesOfTokenType
in interface TokenMaker
getMarkOccurrencesOfTokenType
in class TokenMakerBase
type
- The token type.public Token getTokenList(Segment text, int initialTokenType, int startOffset)
text
. This method must be implemented by
subclasses so they can correctly implement syntax highlighting.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.Token
in a linked list representing
the syntax highlighted text.public final void yyreset(Reader reader)
reader
- the new input streampublic final void yyclose() throws IOException
IOException
public final int yystate()
public final void yybegin(int newState)
yybegin
in class AbstractJFlexTokenMaker
newState
- the new lexical statepublic final String yytext()
public final char yycharat(int pos)
pos
- the position of the character to fetch.
A value from 0 to yylength()-1.public final int yylength()
public void yypushback(int number)
number
- the number of characters to be read again.
This number must not be greater than yylength()!public Token yylex() throws IOException
IOException
- if any I/O-Error occursCopyright © 2003–2015. All rights reserved.