/**
* This program and the accompanying materials
* are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
* Created on 05.03.2003
*
* @author Stefan Langer (musk)
* @version $Revision: 1.10 $
*/
package net.sourceforge.phpeclipse.phpeditor.php;
import java.util.*;
import org.eclipse.jface.text.*;
import org.eclipse.jface.text.rules.*;
/**
*
*/
public class PHPPartitionScanner implements IPartitionTokenScanner
{
// private final int HTML = 0;
// private final int PHP = 1;
// private final int JS = 2;
// private final int CSS = 4;
// private final int COMMENT = 5;
// private final int HTMLCOMMENT = 6;
private IDocument fDocument = null;
private int fOffset = -1;
// private int fLastOffset = -1;
private String fContentType = IPHPPartitionScannerConstants.HTML;
private boolean partitionBorder = false;
private int fTokenOffset;
private int fEnd = -1;
private int fLength;
//private int fState = HTML;
private Map tokens = new HashMap();
public PHPPartitionScanner()
{
this.tokens.put(
IPHPPartitionScannerConstants.PHP,
new Token(IPHPPartitionScannerConstants.PHP));
this.tokens.put(
IPHPPartitionScannerConstants.PHP_MULTILINE_COMMENT,
new Token(IPHPPartitionScannerConstants.PHP_MULTILINE_COMMENT));
this.tokens.put(
IPHPPartitionScannerConstants.HTML,
new Token(IPHPPartitionScannerConstants.HTML));
this.tokens.put(
IPHPPartitionScannerConstants.HTML_MULTILINE_COMMENT,
new Token(IPHPPartitionScannerConstants.HTML_MULTILINE_COMMENT));
}
private IToken getToken(String type)
{
fLength = fOffset-fTokenOffset;
IToken token = (IToken)this.tokens.get(type);
Assert.isNotNull(token, "Token for type \"" + type + "\" not found!");
return token;
}
/* (non-Javadoc)
* @see org.eclipse.jface.text.rules.IPartitionTokenScanner#setPartialRange(org.eclipse.jface.text.IDocument, int, int, java.lang.String, int)
*/
public void setPartialRange(
IDocument document,
int offset,
int length,
String contentType,
int partitionOffset)
{
this.setRange(document, offset, length);
if(this.tokens.containsKey(contentType))
fContentType = contentType;
if (partitionOffset > -1)
{
partitionBorder = false;
fTokenOffset = partitionOffset;
}
}
/* (non-Javadoc)
* @see org.eclipse.jface.text.rules.ITokenScanner#getTokenLength()
*/
public int getTokenLength()
{
return fLength;
}
/* (non-Javadoc)
* @see org.eclipse.jface.text.rules.ITokenScanner#getTokenOffset()
*/
public int getTokenOffset()
{
return fTokenOffset;
}
/* (non-Javadoc)
* @see org.eclipse.jface.text.rules.ITokenScanner#nextToken()
*/
public IToken nextToken()
{
int c;
// check if we are not allready at the end of the
// file
if ((c = read()) == ICharacterScanner.EOF)
{
partitionBorder = false;
return Token.EOF;
}
else
unread();
if (partitionBorder)
{
fTokenOffset = fOffset;
partitionBorder = false;
}
while ((c = read()) != ICharacterScanner.EOF)
{
switch (c)
{
case '<' :
if (fContentType != IPHPPartitionScannerConstants.PHP_MULTILINE_COMMENT && checkPattern(new char[] { '?', 'p', 'h', 'p' }, true))
{
if (fContentType != IPHPPartitionScannerConstants.PHP
&& fOffset - 5 > 0)
{
fOffset -= 5;
IToken token = getToken(fContentType);
fContentType = IPHPPartitionScannerConstants.PHP;
return token;
}
else
fContentType = IPHPPartitionScannerConstants.PHP;
// remember offset of this partition
fTokenOffset = fOffset - 5;
}
else if (checkPattern(new char[] { '!', '-', '-' }))
{
// return previouse partition
if (fContentType
!= IPHPPartitionScannerConstants
.HTML_MULTILINE_COMMENT
&& fOffset - 4 > 0)
{
fOffset -= 4;
IToken token = getToken(fContentType);
fContentType =
IPHPPartitionScannerConstants
.HTML_MULTILINE_COMMENT;
return token;
}
else
fContentType =
IPHPPartitionScannerConstants
.HTML_MULTILINE_COMMENT;
fTokenOffset = fOffset - 4;
}
break;
case '?' :
if (fContentType == IPHPPartitionScannerConstants.PHP)
{
if ((c = read()) == '>')
{
fContentType = IPHPPartitionScannerConstants.HTML;
partitionBorder = true;
return getToken(IPHPPartitionScannerConstants.PHP);
}
else if(c != ICharacterScanner.EOF)
unread();
}
break;
case '-' :
if (fContentType
== IPHPPartitionScannerConstants.HTML_MULTILINE_COMMENT
&& checkPattern(new char[] { '-', '>' }))
{
fContentType = IPHPPartitionScannerConstants.HTML;
partitionBorder = true;
return getToken(
IPHPPartitionScannerConstants
.HTML_MULTILINE_COMMENT);
}
break;
case '/' :
if ((c=read()) == '*')
{ // MULTINE COMMENT JAVASCRIPT, CSS, PHP
if (fContentType == IPHPPartitionScannerConstants.PHP
&& fOffset - 2 > 0)
{
fOffset -= 2;
IToken token = getToken(fContentType);
fContentType =
IPHPPartitionScannerConstants
.PHP_MULTILINE_COMMENT;
return token;
}
else if (
fContentType
== IPHPPartitionScannerConstants
.PHP_MULTILINE_COMMENT)
{
fTokenOffset = fOffset - 2;
}
}
else if(c != ICharacterScanner.EOF)
unread();
break;
case '*' :
if ((c = read()) == '/')
{
if (fContentType
== IPHPPartitionScannerConstants
.PHP_MULTILINE_COMMENT)
{
fContentType = IPHPPartitionScannerConstants.PHP;
partitionBorder = true;
return getToken(
IPHPPartitionScannerConstants
.PHP_MULTILINE_COMMENT);
}
else if (
fContentType
== IPHPPartitionScannerConstants
.CSS_MULTILINE_COMMENT)
{
}
else if (
fContentType
== IPHPPartitionScannerConstants
.JS_MULTILINE_COMMENT)
{
}
}
else if(c != ICharacterScanner.EOF)
unread();
break;
}
}
// end of file reached but we have to return the
// last partition.
return getToken(fContentType);
}
/* (non-Javadoc)
* @see org.eclipse.jface.text.rules.ITokenScanner#setRange(org.eclipse.jface.text.IDocument, int, int)
*/
public void setRange(IDocument document, int offset, int length)
{
fDocument = document;
fOffset = offset;
fTokenOffset = offset;
fLength = 0;
fEnd = fOffset + length;
//partitionBorder = false;
}
private int read()
{
try
{
if (fOffset < fEnd)
{
return fDocument.getChar(fOffset++);
}
return ICharacterScanner.EOF;
}
catch (BadLocationException e)
{
// should never happen
// TODO write stacktrace to log
fOffset = fEnd;
return ICharacterScanner.EOF;
}
}
private void unread()
{
--fOffset;
}
private boolean checkPattern(char[] pattern)
{
return checkPattern(pattern, false);
}
/**
* Check if next character sequence read from document is equals to
* the provided pattern. Pattern is read from left to right until the
* first character read doesn't match. If this happens all read characters are
* unread.
* @param pattern The pattern to check.
* @return true
if pattern is equals else returns false
.
*/
private boolean checkPattern(char[] pattern, boolean ignoreCase)
{
int prevOffset = fOffset;
for (int i = 0; i < pattern.length; i++)
{
int c = read();
if(c == ICharacterScanner.EOF || !letterEquals(c, pattern[i], ignoreCase))
{
fOffset = prevOffset;
return false;
}
}
return true;
}
private boolean letterEquals(int test, char letter, boolean ignoreCase)
{
if(test == letter)
return true;
else if(ignoreCase && Character.isLowerCase(letter) && test == Character.toUpperCase(letter))
return true;
else if(ignoreCase && Character.isUpperCase(letter) && test == Character.toLowerCase(letter))
return true;
return false;
}
}