/**
* 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: 1.13 $
*/
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 static final boolean DEBUG = false;
private IDocument fDocument = null;
private int fOffset = -1;
private String fContentType = IPHPPartitionScannerConstants.HTML;
private String fPrevContentType;
private boolean partitionBorder = false;
private int fTokenOffset;
private int fEnd = -1;
private int fLength;
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));
this.tokens.put(
IDocument.DEFAULT_CONTENT_TYPE,
new Token(IDocument.DEFAULT_CONTENT_TYPE));
}
private IToken getToken(String type) {
fLength = fOffset - fTokenOffset;
IToken token = (IToken) this.tokens.get(type);
Assert.isNotNull(token, "Token for type \"" + type + "\" not found!");
if (DEBUG) {
System.out.println(
"Partition: fTokenOffset="
+ fTokenOffset
+ " fContentType="
+ fContentType
+ " fLength="
+ fLength);
}
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 (DEBUG) {
System.out.println(
"PartialRange: contentType="
+ contentType
+ " partitionOffset="
+ partitionOffset);
}
if (this.tokens.containsKey(contentType))
fContentType = contentType;
// TODO Calculate previouse 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);
// save previouse contenttype
fPrevContentType = fContentType;
fContentType = IPHPPartitionScannerConstants.PHP;
return token;
} else
fContentType = IPHPPartitionScannerConstants.PHP;
// remember offset of this partition
fTokenOffset = fOffset - 5;
} else if (fContentType != IPHPPartitionScannerConstants.PHP_MULTILINE_COMMENT
&& (checkPattern(new char[] { '?', ' ' }, false)
|| checkPattern(new char[] { '?', '\r' }, false)
|| checkPattern(new char[] { '?', '\n' }, false))) {
if (fContentType != IPHPPartitionScannerConstants.PHP
&& fOffset - 3 > 0) {
fOffset -= 3;
IToken token = getToken(fContentType);
// save previouse contenttype
fPrevContentType = fContentType;
fContentType = IPHPPartitionScannerConstants.PHP;
return token;
} else
fContentType = IPHPPartitionScannerConstants.PHP;
// remember offset of this partition
fTokenOffset = fOffset - 3;
} 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()) == '>') {
// TODO Actually calculate the previouse contenttype from the document
if (fPrevContentType != null)
fContentType = fPrevContentType;
else
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) {
if (DEBUG) {
System.out.println("SET RANGE: offset=" + offset + " length=" + 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;
}
}