net.sf.gridarta.textedit.textarea.tokenmarker

Class TokenMarker

java.lang.Object

net.sf.gridarta.textedit.textarea.tokenmarker.TokenMarker

Direct Known Subclasses:

CrossfireDialogTokenMarker, CTokenMarker, DaimoninAITokenMarker, EmptyTokenMarker, HTMLTokenMarker, LuaTokenMarker, PythonTokenMarker

public abstract class TokenMarker
extends java.lang.Object

A token marker that splits lines of text into tokens. Each token carries a length field and an identification tag that can be mapped to a color for painting that token.

For performance reasons, the linked list of tokens is reused after each line is tokenized. Therefore, the return value of markTokens should only be used for immediate painting. Notably, it cannot be cached.

See Also:

Token

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	TokenMarker() Creates a new TokenMarker.

Method Summary

Modifier and Type	Method and Description
protected void	addToken(int length, byte id) Adds a token to the token list.
void	deleteLines(int index, int lines) Informs the token marker that line have been deleted from the document.
void	insertLines(int index, int lines) Informs the token marker that lines have been inserted into the document.
boolean	isNextLineRequested() Returns true if the next line should be repainted.
java.util.List<Token>	markTokens(javax.swing.text.Segment line, int lineIndex) A wrapper for the lower-level markTokensImpl method that is called to split a line up into tokens.
protected abstract byte	markTokensImpl(byte token, javax.swing.text.Segment line) An abstract method that splits a line up into tokens.

Methods inherited from class java.lang.Object

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

Constructor Detail

TokenMarker

protected TokenMarker()

Creates a new TokenMarker. This DOES NOT create a lineInfo array; an initial call to insertLines() does that.

Method Detail

markTokens

public java.util.List<Token> markTokens(javax.swing.text.Segment line,
                                        int lineIndex)

A wrapper for the lower-level markTokensImpl method that is called to split a line up into tokens.

Parameters:

line - the line

lineIndex - the line number

Returns:

the tokens

markTokensImpl

protected abstract byte markTokensImpl(byte token,
                                       javax.swing.text.Segment line)

An abstract method that splits a line up into tokens. It should parse the line, and call addToken() to add syntax tokens to the token list. Then, it should return the initial token type for the next line.

For example if the current line contains the start of a multi-line comment that doesn't end on that line, this method should return the comment token type so that it continues on the next line.

Parameters:

token - the initial token type for this line

line - the line to be tokenized

Returns:

the initial token type for the next line

insertLines

public void insertLines(int index,
                        int lines)

Informs the token marker that lines have been inserted into the document. This inserts a gap in the lineInfo array.

Parameters:

index - the first line number

lines - the number of lines

deleteLines

public void deleteLines(int index,
                        int lines)

Informs the token marker that line have been deleted from the document. This removes the lines in question from the lineInfo array.

Parameters:

index - the first line number

lines - the number of lines

isNextLineRequested

public boolean isNextLineRequested()

Returns true if the next line should be repainted. This will return true after a line has been tokenized that starts a multi-line token that continues onto the next line.

addToken

protected void addToken(int length,
                        byte id)

Adds a token to the token list.

Parameters:

length - the length of the token

id - the id of the token