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/*
* 02/24/2004
*
* TokenMaker.java - An object that can take a chunk of text and return a
* linked list of Tokens representing it.
*
* This library is distributed under a modified BSD license. See the included
* RSyntaxTextArea.License.txt file for details.
*/
package org.fife.ui.rsyntaxtextarea;
import javax.swing.Action;
import javax.swing.text.Segment;
/**
* An implementation of TokenMaker is a class that turns text into
* a linked list of Tokens for syntax highlighting
* in a particular language.
*
* @see Token
* @see AbstractTokenMaker
*
* @author Robert Futrell
* @version 0.2
*/
public interface TokenMaker {
/**
* Adds a null token to the end of the current linked list of tokens.
* This should be put at the end of the linked list whenever the last
* token on the current line is NOT a multi-line token.
*/
public void addNullToken();
/**
* Adds the token specified to the current linked list of tokens.
*
* @param array The character array from which to get the text.
* @param start Start offset in segment of token.
* @param end End offset in segment of token.
* @param tokenType The token's type.
* @param startOffset The offset in the document at which this token
* occurs.
*/
public void addToken(char[] array, int start, int end, int tokenType,
int startOffset);
/**
* Returns the closest {@link TokenTypes "standard" token type} for a given
* "internal" token type (e.g. one whose value is < 0).
*
* @param type The token type.
* @return The closest "standard" token type. If a mapping is not defined
* for this language, then type is returned.
*/
public int getClosestStandardTokenTypeForInternalType(int type);
/**
* Returns whether this programming language uses curly braces
* ('{' and '}') to denote code blocks.
*
* @param 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.
* @return Whether curly braces denote code blocks.
*/
public boolean getCurlyBracesDenoteCodeBlocks(int languageIndex);
/**
* Returns the last token on this line's type if the token is "unfinished",
* or {@link Token#NULL} if it was finished. For example, if C-style
* syntax highlighting is being implemented, and text
* contained a line of code that contained the beginning of a comment but
* no end-comment marker ("*\/"), then this method would return
* {@link Token#COMMENT_MULTILINE} for that line. This is useful
* for doing syntax highlighting.
*
* @param text The line of tokens to examine.
* @param initialTokenType The token type to start with (i.e., the value
* of getLastTokenTypeOnLine for the line before
* text).
* @return The last token on this line's type, or {@link Token#NULL}
* if the line was completed.
*/
public int getLastTokenTypeOnLine(Segment text, int initialTokenType);
/**
* Returns the text to place at the beginning and end of a
* line to "comment" it in this programming language.
*
* @param 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.
* @return 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.
*/
public String[] getLineCommentStartAndEnd(int languageIndex);
/**
* Returns an action to handle "insert break" key presses (i.e. Enter).
*
* @return The action, or null if the default action should
* be used.
*/
public Action getInsertBreakAction();
/**
* Returns whether tokens of the specified type should have "mark
* occurrences" enabled for the current programming language.
*
* @param type The token type.
* @return Whether tokens of this type should have "mark occurrences"
* enabled.
*/
public boolean getMarkOccurrencesOfTokenType(int type);
/**
* Returns the object in charge of marking all occurrences of the token
* at the current caret position, if it is a relevant token. If
* null is returned, a default OccurrenceMarker
* is used.
*
* @return The occurrence marker for this language, or null
* for none.
*/
public OccurrenceMarker getOccurrenceMarker();
/**
* If a line ends in the specified token, this method returns whether
* a new line inserted after that line should be indented.
*
* @param token The token the previous line ends with.
* @return Whether the next line should be indented.
*/
public boolean getShouldIndentNextLineAfter(Token token);
/**
* 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);
/**
* Returns whether a character could be part of an "identifier" token
* in a specific language. This is used to identify such things as the
* bounds of the "word" to select on double-clicking.
*
* @param languageIndex The language index the character was found in.
* @param ch The character.
* @return Whether the character could be part of an "identifier" token.
*/
public boolean isIdentifierChar(int languageIndex, char ch);
/**
* Returns whether this language is a markup language.
*
* @return Whether this language is markup.
*/
public boolean isMarkupLanguage();
}