org.fife.ui.rsyntaxtextarea

Class RSyntaxDocument

java.lang.Object

javax.swing.text.AbstractDocument

javax.swing.text.PlainDocument

org.fife.ui.rsyntaxtextarea.RSyntaxDocument

All Implemented Interfaces:

Serializable, Document, SyntaxConstants

public class RSyntaxDocument
extends PlainDocument
implements SyntaxConstants

The document used by RSyntaxTextArea. This document is like javax.swing.text.PlainDocument except that it also keeps track of syntax highlighting in the document. It has a "style" attribute associated with it that determines how syntax highlighting is done (i.e., what language is being highlighted).

Instances of RSyntaxTextArea will only accept instances of RSyntaxDocument, since it is this document that keeps track of syntax highlighting. All others will cause an exception to be thrown.

To change the language being syntax highlighted at any time, you merely have to call setSyntaxStyle(java.lang.String). Other than that, this document can be treated like any other save one caveat: all DocumentEvents of type CHANGE use their offset and length values to represent the first and last lines, respectively, that have had their syntax coloring change. This is really a hack to increase the speed of the painting code and should really be corrected, but oh well.

Version:

0.1

Author:

Robert Futrell

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class javax.swing.text.AbstractDocument

AbstractDocument.AbstractElement, AbstractDocument.AttributeContext, AbstractDocument.BranchElement, AbstractDocument.Content, AbstractDocument.DefaultDocumentEvent, AbstractDocument.ElementEdit, AbstractDocument.LeafElement

Field Summary

Fields

Modifier and Type	Field and Description
protected DynamicIntArray	lastTokensOnLines Array of values representing the "last token type" on each line.

Fields inherited from class javax.swing.text.PlainDocument

lineLimitAttribute, tabSizeAttribute

Fields inherited from class javax.swing.text.AbstractDocument

BAD_LOCATION, BidiElementName, ContentElementName, ElementNameAttribute, listenerList, ParagraphElementName, SectionElementName

Fields inherited from interface org.fife.ui.rsyntaxtextarea.SyntaxConstants

SYNTAX_STYLE_ASSEMBLER_X86, SYNTAX_STYLE_C, SYNTAX_STYLE_CPLUSPLUS, SYNTAX_STYLE_CSHARP, SYNTAX_STYLE_CSS, SYNTAX_STYLE_FORTRAN, SYNTAX_STYLE_GROOVY, SYNTAX_STYLE_HTML, SYNTAX_STYLE_JAVA, SYNTAX_STYLE_JAVASCRIPT, SYNTAX_STYLE_JSP, SYNTAX_STYLE_LISP, SYNTAX_STYLE_LUA, SYNTAX_STYLE_MAKEFILE, SYNTAX_STYLE_NONE, SYNTAX_STYLE_PERL, SYNTAX_STYLE_PHP, SYNTAX_STYLE_PROPERTIES_FILE, SYNTAX_STYLE_PYTHON, SYNTAX_STYLE_RUBY, SYNTAX_STYLE_SAS, SYNTAX_STYLE_SQL, SYNTAX_STYLE_TCL, SYNTAX_STYLE_UNIX_SHELL, SYNTAX_STYLE_WINDOWS_BATCH, SYNTAX_STYLE_XML

Fields inherited from interface javax.swing.text.Document

StreamDescriptionProperty, TitleProperty

Constructor Summary

Constructors

Constructor and Description
RSyntaxDocument(String syntaxStyle) Constructs a plain text document.
RSyntaxDocument(TokenMakerFactory tmf, String syntaxStyle) Constructs a plain text document.

Method Summary

Methods

Modifier and Type	Method and Description
protected void	fireInsertUpdate(DocumentEvent e) Alerts all listeners to this document of an insertion.
protected void	fireRemoveUpdate(DocumentEvent chng) This method is called AFTER the content has been inserted into the document and the element structure has been updated.
boolean	getCurlyBracesDenoteCodeBlocks() Returns whether the current programming language uses curly braces ('{' and '}') to denote code blocks.
int	getLastTokenTypeOnLine(int line) Returns the token type of the last token on the given line.
String[]	getLineCommentStartAndEnd() Returns the text to place at the beginning and end of a line to "comment" it in the current programming language.
boolean	getShouldIndentNextLine(int line) This method returns whether auto indentation should be done if Enter is pressed at the end of the specified line.
Token	getTokenListForLine(int line) Returns a token list for the specified segment of text representing the specified line number.
void	setSyntaxStyle(String styleKey) Sets the syntax style being used for syntax highlighting in this document.
void	setSyntaxStyle(TokenMaker tokenMaker) Sets the syntax style being used for syntax highlighting in this document.
void	setTokenMakerFactory(TokenMakerFactory tmf) Sets the token maker factory used by this document.
void	setWhitespaceVisible(boolean visible, RSyntaxTextArea textArea) Sets whether whitespace is visible.
protected void	updateSyntaxHighlightingInformation() Updates internal state information; e.g.

Methods inherited from class javax.swing.text.PlainDocument

createDefaultRoot, getDefaultRootElement, getParagraphElement, insertString, insertUpdate, removeUpdate

Methods inherited from class javax.swing.text.AbstractDocument

addDocumentListener, addUndoableEditListener, createBranchElement, createLeafElement, createPosition, dump, fireChangedUpdate, fireUndoableEditUpdate, getAsynchronousLoadPriority, getAttributeContext, getBidiRootElement, getContent, getCurrentWriter, getDocumentFilter, getDocumentListeners, getDocumentProperties, getEndPosition, getLength, getListeners, getProperty, getRootElements, getStartPosition, getText, getText, getUndoableEditListeners, postRemoveUpdate, putProperty, readLock, readUnlock, remove, removeDocumentListener, removeUndoableEditListener, render, replace, setAsynchronousLoadPriority, setDocumentFilter, setDocumentProperties, writeLock, writeUnlock

Methods inherited from class java.lang.Object

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

Field Detail

lastTokensOnLines

protected DynamicIntArray lastTokensOnLines

Array of values representing the "last token type" on each line. This is used in cases such as multiline comments: if the previous line ended with an (unclosed) multiline comment, we can use this knowledge and start the current line's syntax highlighting in multiline comment state.

Constructor Detail

RSyntaxDocument

public RSyntaxDocument(String syntaxStyle)

Constructs a plain text document. A default root element is created, and the tab size set to 5.

Parameters:

syntaxStyle - The syntax highlighting scheme to use.

RSyntaxDocument

public RSyntaxDocument(TokenMakerFactory tmf,
               String syntaxStyle)

Constructs a plain text document. A default root element is created, and the tab size set to 5.

Parameters:

tmf - The TokenMakerFactory for this document. If this is null, a default factory is used.

syntaxStyle - The syntax highlighting scheme to use.

Method Detail

fireInsertUpdate

protected void fireInsertUpdate(DocumentEvent e)

Alerts all listeners to this document of an insertion. This is overridden so we can update our syntax highlighting stuff.

The syntax highlighting stuff has to be here instead of in insertUpdate because insertUpdate is not called by the undo/redo actions, but this method is.

Overrides:

fireInsertUpdate in class AbstractDocument

Parameters:

e - The change.

fireRemoveUpdate

protected void fireRemoveUpdate(DocumentEvent chng)

This method is called AFTER the content has been inserted into the document and the element structure has been updated.

The syntax-highlighting updates need to be done here (as opposed to an override of postRemoveUpdate) as this method is called in response to undo/redo events, whereas postRemoveUpdate is not.

Now that the text is actually inserted into the content and element structure, we can update our token elements and "last tokens on lines" structure.

Overrides:

fireRemoveUpdate in class AbstractDocument

Parameters:

chng - The change that occurred.

See Also:

PlainDocument.removeUpdate(javax.swing.text.AbstractDocument.DefaultDocumentEvent)

getCurlyBracesDenoteCodeBlocks

public boolean getCurlyBracesDenoteCodeBlocks()

Returns whether the current programming language uses curly braces ('{' and '}') to denote code blocks.

Returns:

Whether curly braces denote code blocks.

getLastTokenTypeOnLine

public int getLastTokenTypeOnLine(int line)

Returns the token type of the last token on the given line.

Parameters:

line - The line to inspect.

Returns:

The token type of the last token on the specified line. If the line is invalid, an exception is thrown.

getLineCommentStartAndEnd

public String[] getLineCommentStartAndEnd()

Returns the text to place at the beginning and end of a line to "comment" it in the current programming language.

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.

getShouldIndentNextLine

public boolean getShouldIndentNextLine(int line)

This method returns whether auto indentation should be done if Enter is pressed at the end of the specified line.

Parameters:

line - The line to check.

Returns:

Whether an extra indentation should be done.

getTokenListForLine

public final Token getTokenListForLine(int line)

Returns a token list for the specified segment of text representing the specified line number. This method is basically a wrapper for tokenMaker.getTokenList that takes into account the last token on the previous line to assure token accuracy.

Parameters:

line - The line number of text in the document, >= 0.

Returns:

A token list representing the specified line.

setSyntaxStyle

public void setSyntaxStyle(String styleKey)

Sets the syntax style being used for syntax highlighting in this document. What styles are supported by a document is determined by its TokenMakerFactory. By default, all RSyntaxDocuments support all languages built into RSyntaxTextArea.

Parameters:

styleKey - The new style to use, such as SyntaxConstants.SYNTAX_STYLE_JAVA. If this style is not known or supported by this document, then SyntaxConstants.SYNTAX_STYLE_NONE is used.

setSyntaxStyle

public void setSyntaxStyle(TokenMaker tokenMaker)

Sets the syntax style being used for syntax highlighting in this document. You should call this method if you've created a custom token maker for a language not normally supported by RSyntaxTextArea.

Parameters:

tokenMaker - The new token maker to use.

setTokenMakerFactory

public void setTokenMakerFactory(TokenMakerFactory tmf)

Sets the token maker factory used by this document.

Parameters:

tmf - The TokenMakerFactory for this document. If this is null, a default factory is used.

setWhitespaceVisible

public void setWhitespaceVisible(boolean visible,
                        RSyntaxTextArea textArea)

Sets whether whitespace is visible. This property is actually setting whether the tokens generated from this document "paint" something when they represent whitespace.

Parameters:

visible - Whether whitespace should be visible.

updateSyntaxHighlightingInformation

protected void updateSyntaxHighlightingInformation()

Updates internal state information; e.g. the "last tokens on lines" data. After this, a changed update is fired to let listeners know that the document's structure has changed.

This is called internally whenever the syntax style changes.