Class MarkdownTokenMaker

java.lang.Object
org.fife.ui.rsyntaxtextarea.TokenMakerBase
org.fife.ui.rsyntaxtextarea.AbstractJFlexTokenMaker
org.fife.ui.rsyntaxtextarea.modes.AbstractMarkupTokenMaker
org.fife.ui.rsyntaxtextarea.modes.MarkdownTokenMaker
All Implemented Interfaces:
TokenMaker
public class MarkdownTokenMaker extends AbstractMarkupTokenMaker
Scanner for Markdown files. This is based off of our HTMLTokenMaker class, and as such, probably highlights more HTML than it should. Still, it should be good enough for most use cases. 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 MarkdownTokenMaker.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.
Version:
0.9

  • Field Details

    • YYEOF

      public static final int YYEOF
      This character denotes the end of file
      See Also:

    • CODE

      public static final int CODE
      lexical states
      See Also:

    • INTAG_CHECK_TAG_NAME

      public static final int INTAG_CHECK_TAG_NAME
      See Also:

    • STRIKETHROUGH

      public static final int STRIKETHROUGH
      See Also:

    • BOLDITALIC2

      public static final int BOLDITALIC2
      See Also:

    • BOLDITALIC1

      public static final int BOLDITALIC1
      See Also:

    • ITALIC2

      public static final int ITALIC2
      See Also:

    • ITALIC1

      public static final int ITALIC1
      See Also:

    • BOLD2

      public static final int BOLD2
      See Also:

    • BOLD1

      public static final int BOLD1
      See Also:

    • SYNTAX_HIGHLIGHTING

      public static final int SYNTAX_HIGHLIGHTING
      See Also:

    • INATTR_SINGLE

      public static final int INATTR_SINGLE
      See Also:

    • INATTR_DOUBLE

      public static final int INATTR_DOUBLE
      See Also:

    • YYINITIAL

      public static final int YYINITIAL
      See Also:

    • INTAG

      public static final int INTAG
      See Also:

    • ZZ_CMAP_PACKED

      private static final String ZZ_CMAP_PACKED
      Translates characters to character classes
      See Also:

    • ZZ_CMAP

      private static final char[] ZZ_CMAP
      Translates characters to character classes

    • ZZ_ACTION

      private static final int[] ZZ_ACTION
      Translates DFA states to action switch labels.

    • ZZ_ACTION_PACKED_0

      private static final String ZZ_ACTION_PACKED_0
      See Also:

    • ZZ_ROWMAP

      private static final int[] ZZ_ROWMAP
      Translates a state to a row index in the transition table

    • ZZ_ROWMAP_PACKED_0

      private static final String ZZ_ROWMAP_PACKED_0
      See Also:

    • ZZ_TRANS

      private static final int[] ZZ_TRANS
      The transition table of the DFA

    • ZZ_TRANS_PACKED_0

      private static final String ZZ_TRANS_PACKED_0
      See Also:

    • ZZ_UNKNOWN_ERROR

      private static final int ZZ_UNKNOWN_ERROR
      See Also:

    • ZZ_NO_MATCH

      private static final int ZZ_NO_MATCH
      See Also:

    • ZZ_PUSHBACK_2BIG

      private static final int ZZ_PUSHBACK_2BIG
      See Also:

    • ZZ_ERROR_MSG

      private static final String[] ZZ_ERROR_MSG

    • ZZ_ATTRIBUTE

      private static final int[] ZZ_ATTRIBUTE
      ZZ_ATTRIBUTE[aState] contains the attributes of state aState

    • ZZ_ATTRIBUTE_PACKED_0

      private static final String ZZ_ATTRIBUTE_PACKED_0
      See Also:

    • zzReader

      private Reader zzReader
      the input device

    • zzState

      private int zzState
      the current state of the DFA

    • zzLexicalState

      private int zzLexicalState
      the current lexical state

    • zzBuffer

      private char[] zzBuffer
      this buffer contains the current text to be matched and is the source of the yytext() string

    • zzMarkedPos

      private int zzMarkedPos
      the textposition at the last accepting state

    • zzCurrentPos

      private int zzCurrentPos
      the current text position in the buffer

    • zzStartRead

      private int zzStartRead
      startRead marks the beginning of the yytext() string in the buffer

    • zzEndRead

      private int zzEndRead
      endRead marks the last character in the buffer, that has been read from input

    • zzAtEOF

      private boolean zzAtEOF
      zzAtEOF == true invalid input: '<'=> the scanner is at the EOF

    • INTERNAL_ATTR_DOUBLE

      public static final int INTERNAL_ATTR_DOUBLE
      Type specific to XMLTokenMaker denoting a line ending with an unclosed double-quote attribute.
      See Also:

    • INTERNAL_ATTR_SINGLE

      public static final int INTERNAL_ATTR_SINGLE
      Type specific to XMLTokenMaker denoting a line ending with an unclosed single-quote attribute.
      See Also:

    • INTERNAL_INTAG

      public static final int INTERNAL_INTAG
      Token type specific to MarkdownTokenMaker; this signals that the user has ended a line with an unclosed HTML tag; thus a new line is beginning still inside of the tag.
      See Also:

    • INTERNAL_IN_BOLDITALIC1

      public static final int INTERNAL_IN_BOLDITALIC1
      Token type specific to MarkdownTokenMaker; this signals that the user has ended a line with an unclosed "***" bold/italic tag; thus a new line is beginning still inside of the tag.
      See Also:

    • INTERNAL_IN_BOLDITALIC2

      public static final int INTERNAL_IN_BOLDITALIC2
      Token type specific to MarkdownTokenMaker; this signals that the user has ended a line with an unclosed "___" bold/italic tag; thus a new line is beginning still inside of the tag.
      See Also:

    • INTERNAL_IN_BOLD1

      public static final int INTERNAL_IN_BOLD1
      Token type specific to MarkdownTokenMaker; this signals that the user has ended a line with an unclosed "**" bold tag; thus a new line is beginning still inside of the tag.
      See Also:

    • INTERNAL_IN_BOLD2

      public static final int INTERNAL_IN_BOLD2
      Token type specific to MarkdownTokenMaker; this signals that the user has ended a line with an unclosed "__" bold tag; thus a new line is beginning still inside of the tag.
      See Also:

    • INTERNAL_IN_ITALIC1

      public static final int INTERNAL_IN_ITALIC1
      Token type specific to MarkdownTokenMaker; this signals that the user has ended a line with an unclosed "*" italic tag; thus a new line is beginning still inside of the tag.
      See Also:

    • INTERNAL_IN_ITALIC2

      public static final int INTERNAL_IN_ITALIC2
      Token type specific to MarkdownTokenMaker; this signals that the user has ended a line with an unclosed "_" italic tag; thus a new line is beginning still inside of the tag.
      See Also:

    • INTERNAL_IN_CODE

      public static final int INTERNAL_IN_CODE
      Token type specific to MarkdownTokenMaker; this signals that the user has ended a line with an unclosed "`" code tag; thus a new line is beginning still inside of the tag.
      See Also:

    • INTERNAL_IN_SYNTAX_HIGHLIGHTING

      public static final int INTERNAL_IN_SYNTAX_HIGHLIGHTING
      Token type specific to MarkdownTokenMaker; this signals that the user has ended a line with an unclosed "```" code block; thus a new line is beginning still inside of the block.
      See Also:

    • INTERNAL_IN_STRIKETHROUGH

      public static final int INTERNAL_IN_STRIKETHROUGH
      Token type specific to MarkdownTokenMaker; this signals that the user has ended a line with an unclosed "~~" strikethrough section; thus a new line is beginning still inside of the block.
      See Also:

    • completeCloseTags

      private static boolean completeCloseTags
      Whether closing markup tags are automatically completed for Markdown.

  • Constructor Details

    • MarkdownTokenMaker

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

    • MarkdownTokenMaker

      public MarkdownTokenMaker(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.

    • MarkdownTokenMaker

      public MarkdownTokenMaker(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 Details

    • zzUnpackAction

      private static int[] zzUnpackAction()

    • zzUnpackAction

      private static int zzUnpackAction(String packed, int offset, int[] result)

    • zzUnpackRowMap

      private static int[] zzUnpackRowMap()

    • zzUnpackRowMap

      private static int zzUnpackRowMap(String packed, int offset, int[] result)

    • zzUnpackTrans

      private static int[] zzUnpackTrans()

    • zzUnpackTrans

      private static int zzUnpackTrans(String packed, int offset, int[] result)

    • zzUnpackAttribute

      private static int[] zzUnpackAttribute()

    • zzUnpackAttribute

      private static int zzUnpackAttribute(String packed, int offset, int[] result)

    • addEndToken

      private void addEndToken(int tokenType)
      Adds the token specified to the current linked list of tokens as an "end token;" that is, at zzMarkedPos.
      Parameters:
      tokenType - The token's type.

    • addToken

      private void addToken(int tokenType)
      Adds the token specified to the current linked list of tokens.
      Parameters:
      tokenType - The token's type.

    • addToken

      private void addToken(int start, int end, int tokenType)
      Adds the token specified to the current linked list of tokens.
      Parameters:
      tokenType - The token's type.

    • 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.

    • createOccurrenceMarker

      protected OccurrenceMarker createOccurrenceMarker()
      Description copied from class: TokenMakerBase
      Returns the occurrence marker to use for this token maker. Subclasses can override to use different implementations.
      Overrides:
      createOccurrenceMarker in class TokenMakerBase
      Returns:
      The occurrence marker to use.

    • getCompleteCloseTags

      public boolean getCompleteCloseTags()
      Sets whether markup close tags should be completed. You might not want this to be the case, since some tags in standard HTML aren't usually closed.
      Specified by:
      getCompleteCloseTags in class AbstractMarkupTokenMaker
      Returns:
      Whether closing markup tags are completed.
      See Also:

    • getCurlyBracesDenoteCodeBlocks

      public boolean getCurlyBracesDenoteCodeBlocks(int languageIndex)
      Description copied from class: TokenMakerBase
      Returns whether this programming language uses curly braces ('{' and '}') to denote code blocks. The default implementation returns false; subclasses can override this method if necessary.
      Specified by:
      getCurlyBracesDenoteCodeBlocks in interface TokenMaker
      Overrides:
      getCurlyBracesDenoteCodeBlocks in class TokenMakerBase
      Parameters:
      languageIndex - The language index at the offset in question. Since some TokenMakers effectively have nested languages (such as JavaScript in HTML), this parameter tells the TokenMaker what sub-language to look at.
      Returns:
      Whether curly braces denote code blocks.

    • getLineCommentStartAndEnd

      public String[] getLineCommentStartAndEnd(int languageIndex)
      Description copied from interface: TokenMaker
      Returns the text to place at the beginning and end of a line to "comment" it in this programming language.
      Specified by:
      getLineCommentStartAndEnd in interface TokenMaker
      Overrides:
      getLineCommentStartAndEnd in class AbstractMarkupTokenMaker
      Parameters:
      languageIndex - The language index at the offset in question. Since some TokenMakers effectively have nested languages (such as JavaScript in HTML), this parameter tells the TokenMaker what sub-language to look at.
      Returns:
      The start and end strings to add to a line to "comment" it out. A null value for either means there is no string to add for that part. A value of null for the array means this language does not support commenting/uncommenting lines.

    • getMarkOccurrencesOfTokenType

      public boolean getMarkOccurrencesOfTokenType(int type)
      Returns TokenTypes.MARKUP_TAG_NAME.
      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(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.

    • isIdentifierChar

      public boolean isIdentifierChar(int languageIndex, char ch)
      Overridden to accept letters, digits, underscores, and hyphens.
      Specified by:
      isIdentifierChar in interface TokenMaker
      Overrides:
      isIdentifierChar in class TokenMakerBase
      Parameters:
      languageIndex - The language index the character was found in.
      ch - The character.
      Returns:
      Whether the character could be part of an "identifier" token.

    • setCompleteCloseTags

      public static void setCompleteCloseTags(boolean complete)
      Sets whether markup close tags should be completed. You might not want this to be the case, since some tags in standard HTML aren't usually closed.
      Parameters:
      complete - Whether closing markup tags are completed.
      See Also:

    • zzRefill

      private boolean zzRefill()
      Refills the input buffer.
      Returns:
      true if EOF was reached, otherwise false.

    • yyreset

      public final void yyreset(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

    • zzUnpackCMap

      private static char[] zzUnpackCMap(String packed)
      Unpacks the compressed character translation table.
      Parameters:
      packed - the packed character translation table
      Returns:
      the unpacked character translation table

    • yyclose

      public final void yyclose() throws IOException
      Closes the input stream.
      Specified by:
      yyclose in class AbstractJFlexTokenMaker
      Throws:
      IOException - If an IO error occurs.

    • 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 String yytext()
      Returns the text matched by the current regular expression.
      Specified by:
      yytext in class AbstractJFlexTokenMaker

    • 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.

    • zzScanError

      private void zzScanError(int errorCode)
      Reports an error that occured while scanning. In a wellformed scanner (no or only correct usage of yypushback(int) and a match-all fallback rule) this method will only be called with things that "Can't Possibly Happen". If this method is called, something is seriously wrong (e.g. a JFlex bug producing a faulty scanner etc.). Usual syntax/scanner level error handling should be done in error fallback rules.
      Parameters:
      errorCode - the code of the errormessage to display

    • 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 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:
      IOException - if any I/O-Error occurs