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RSyntaxTextArea is the syntax highlighting text editor for Swing applications. Features include syntax highlighting for 40+ languages, code folding, code completion, regex find and replace, macros, code templates, undo/redo, line numbering and bracket matching.
/*
* 11/18/2009
*
* BBCodeTokenMaker.java - Generates tokens for BBCode syntax highlighting.
*
* This library is distributed under a modified BSD license. See the included
* RSyntaxTextArea.License.txt file for details.
*/
package org.fife.ui.rsyntaxtextarea.modes;
import java.io.*;
import javax.swing.text.Segment;
import org.fife.ui.rsyntaxtextarea.*;
/**
* Scanner for BBCode.
*
* 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
BBCodeTokenMaker.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.
*
*
* @author Robert Futrell
* @version 0.7
*
*/
%%
%public
%class BBCodeTokenMaker
%extends AbstractMarkupTokenMaker
%unicode
%type org.fife.ui.rsyntaxtextarea.Token
%{
/**
* Token type specific to BBCodeTokenMaker; this signals that the user has
* ended a line with an unclosed tag; thus a new line is beginning
* still inside of the tag.
*/
public static final int INTERNAL_INTAG = -1;
/**
* Whether closing markup tags are automatically completed for BBCode.
*/
private static boolean completeCloseTags = true;
/**
* Constructor. This must be here because JFlex does not generate a
* no-parameter constructor.
*/
public BBCodeTokenMaker() {
}
/**
* Adds the token specified to the current linked list of tokens.
*
* @param tokenType The token's type.
*/
private void addToken(int tokenType) {
addToken(zzStartRead, zzMarkedPos-1, tokenType);
}
/**
* Adds the token specified to the current linked list of tokens.
*
* @param tokenType The token's type.
*/
private void addToken(int start, int end, int tokenType) {
int so = start + offsetShift;
addToken(zzBuffer, start,end, tokenType, so);
}
/**
* Adds the token specified to the current linked list of tokens.
*
* @param array The character array.
* @param start The starting offset in the array.
* @param end The ending offset in the array.
* @param tokenType The token's type.
* @param startOffset The offset in the document at which this token
* occurs.
*/
@Override
public void addToken(char[] array, int start, int end, int tokenType, int startOffset) {
super.addToken(array, start,end, tokenType, startOffset);
zzStartRead = zzMarkedPos;
}
/**
* Sets whether markup close tags should be completed. The default value
* for BBCode is true.
*
* @return Whether closing markup tags are completed.
* @see #setCompleteCloseTags(boolean)
*/
@Override
public boolean getCompleteCloseTags() {
return completeCloseTags;
}
/**
* Returns null since BBCode has no comments.
*
* @return null always.
*/
@Override
public String[] getLineCommentStartAndEnd(int languageIndex) {
return null;
}
/**
* 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.
*
* @param text The text from which to get tokens.
* @param initialTokenType The token type we should start with.
* @param startOffset The offset into the document at which
* text starts.
* @return The first Token in a linked list representing
* the syntax highlighted text.
*/
public Token getTokenList(Segment text, int initialTokenType, int startOffset) {
resetTokenList();
this.offsetShift = -text.offset + startOffset;
// Start off in the proper state.
int state = Token.NULL;
switch (initialTokenType) {
case INTERNAL_INTAG:
state = INTAG;
start = text.offset;
break;
default:
state = Token.NULL;
}
s = text;
try {
yyreset(zzReader);
yybegin(state);
return yylex();
} catch (IOException ioe) {
ioe.printStackTrace();
return new TokenImpl();
}
}
/**
* Sets whether markup close tags should be completed.
*
* @param complete Whether closing markup tags are completed.
* @see #getCompleteCloseTags()
*/
public static void setCompleteCloseTags(boolean complete) {
completeCloseTags = complete;
}
/**
* Refills the input buffer.
*
* @return true if EOF was reached, otherwise
* false.
*/
private boolean zzRefill() {
return zzCurrentPos>=s.offset+s.count;
}
/**
* 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.
*
* @param reader the new input stream
*/
public final void yyreset(java.io.Reader reader) {
// 's' has been updated.
zzBuffer = s.array;
/*
* We replaced the line below with the two below it because zzRefill
* no longer "refills" the buffer (since the way we do it, it's always
* "full" the first time through, since it points to the segment's
* array). So, we assign zzEndRead here.
*/
//zzStartRead = zzEndRead = s.offset;
zzStartRead = s.offset;
zzEndRead = zzStartRead + s.count - 1;
zzCurrentPos = zzMarkedPos = zzPushbackPos = s.offset;
zzLexicalState = YYINITIAL;
zzReader = reader;
zzAtBOL = true;
zzAtEOF = false;
}
%}
Whitespace = ([ \t\f]+)
LineTerminator = ([\n])
Identifier = ([^ \t\f\n\[]+)
InTagIdentifier = ([^ \t\f\n\[\]\/\=]+)
Tag = ("b"|"i"|"u"|"s"|"size"|"color"|"center"|"quote"|"url"|"img"|"ul"|"li"|"ol"|"youtube"|"gvideo")
%state INTAG
%%
{
{Identifier} { addToken(Token.IDENTIFIER); }
{Whitespace} { addToken(Token.WHITESPACE); }
"[" { addToken(Token.MARKUP_TAG_DELIMITER); yybegin(INTAG); }
"[/" { addToken(Token.MARKUP_TAG_DELIMITER); yybegin(INTAG); }
{LineTerminator} { addNullToken(); return firstToken; }
<> { addNullToken(); return firstToken; }
}
{
"/" { addToken(Token.MARKUP_TAG_DELIMITER); }
{Tag} { addToken(Token.MARKUP_TAG_NAME); }
{InTagIdentifier} { addToken(Token.MARKUP_TAG_ATTRIBUTE); }
{Whitespace} { addToken(Token.WHITESPACE); }
"=" { addToken(Token.OPERATOR); }
"/]" { yybegin(YYINITIAL); addToken(Token.MARKUP_TAG_DELIMITER); }
"]" { yybegin(YYINITIAL); addToken(Token.MARKUP_TAG_DELIMITER); }
. { addToken(Token.IDENTIFIER); /* Unhandled chars, not likely */ }
<> { addToken(zzMarkedPos,zzMarkedPos, INTERNAL_INTAG); return firstToken; }
}