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/*******************************************************************************
* Copyright (c) 2000, 2005 QNX Software Systems and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* QNX Software Systems - Initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.make.internal.ui.text;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.IRegion;
import org.eclipse.jface.text.ITextViewer;
/**
* Used to scan and detect for SQL keywords
*/
public class WordPartDetector {
String wordPart = ""; //$NON-NLS-1$
int offset;
/**
* WordPartDetector.
* @param viewer is a text viewer
* @param documentOffset into the SQL document
*/
public WordPartDetector(ITextViewer viewer, int documentOffset) {
this(viewer.getDocument(), documentOffset);
}
/**
*
* @param doc
* @param documentOffset
*/
public WordPartDetector(IDocument doc, int documentOffset) {
offset = documentOffset - 1;
int endOffset = documentOffset;
try {
IRegion region = doc.getLineInformationOfOffset(documentOffset);
int top = region.getOffset();
int bottom = region.getLength() + top;
while (offset >= top && isMakefileLetter(doc.getChar(offset))) {
offset--;
}
while (endOffset < bottom && isMakefileLetter(doc.getChar(endOffset))) {
endOffset++;
}
//we've been one step too far : increase the offset
offset++;
wordPart = doc.get(offset, endOffset - offset);
} catch (BadLocationException e) {
// do nothing
}
}
public static boolean inMacro(ITextViewer viewer, int offset) {
return inMacro(viewer.getDocument(), offset);
}
public static boolean inMacro(IDocument document, int offset) {
boolean isMacro = false;
// Try to figure out if we are in a Macro.
try {
for (int index = offset - 1; index >= 0; index--) {
char c;
c = document.getChar(index);
if (c == '$') {
isMacro = true;
break;
} else if (Character.isWhitespace(c)) {
break;
}
}
} catch (BadLocationException e) {
}
return isMacro;
}
/**
* @return String
*/
public String toString() {
return wordPart;
}
public int getOffset() {
return offset;
}
boolean isMakefileLetter(char c) {
return Character.isLetterOrDigit(c) || c == '_' || c == '.';
}
}
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