--- /dev/null
+/*******************************************************************************
+ * Copyright (c) 2000, 2005 IBM Corporation 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:
+ * IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package net.sourceforge.phpdt.internal.ui.text.java;
+
+//incastrix
+//import org.eclipse.jface.text.Assert;
+import org.eclipse.core.runtime.Assert;
+import org.eclipse.jface.text.BadLocationException;
+import org.eclipse.jface.text.IDocument;
+import org.eclipse.jface.text.IRegion;
+import org.eclipse.jface.text.ITextViewer;
+import org.eclipse.jface.text.TextPresentation;
+import org.eclipse.jface.text.contentassist.IContextInformation;
+import org.eclipse.jface.text.contentassist.IContextInformationPresenter;
+import org.eclipse.jface.text.contentassist.IContextInformationValidator;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.custom.StyleRange;
+
+public class JavaParameterListValidator implements
+ IContextInformationValidator, IContextInformationPresenter {
+
+ private int fPosition;
+
+ private ITextViewer fViewer;
+
+ private IContextInformation fInformation;
+
+ private int fCurrentParameter;
+
+ public JavaParameterListValidator() {
+ }
+
+ /**
+ * @see IContextInformationValidator#install(IContextInformation,
+ * ITextViewer, int)
+ * @see IContextInformationPresenter#install(IContextInformation,
+ * ITextViewer, int)
+ */
+ public void install(IContextInformation info, ITextViewer viewer,
+ int documentPosition) {
+ fPosition = documentPosition;
+ fViewer = viewer;
+ fInformation = info;
+
+ fCurrentParameter = -1;
+ }
+
+ private int getCommentEnd(IDocument d, int pos, int end)
+ throws BadLocationException {
+ while (pos < end) {
+ char curr = d.getChar(pos);
+ pos++;
+ if (curr == '*') {
+ if (pos < end && d.getChar(pos) == '/') {
+ return pos + 1;
+ }
+ }
+ }
+ return end;
+ }
+
+ private int getStringEnd(IDocument d, int pos, int end, char ch)
+ throws BadLocationException {
+ while (pos < end) {
+ char curr = d.getChar(pos);
+ pos++;
+ if (curr == '\\') {
+ // ignore escaped characters
+ pos++;
+ } else if (curr == ch) {
+ return pos;
+ }
+ }
+ return end;
+ }
+
+ private int getCharCount(IDocument document, int start, int end,
+ String increments, String decrements, boolean considerNesting)
+ throws BadLocationException {
+
+ Assert.isTrue((increments.length() != 0 || decrements.length() != 0)
+ && !increments.equals(decrements));
+
+ int nestingLevel = 0;
+ int charCount = 0;
+ while (start < end) {
+ char curr = document.getChar(start++);
+ switch (curr) {
+ case '/':
+ if (start < end) {
+ char next = document.getChar(start);
+ if (next == '*') {
+ // a comment starts, advance to the comment end
+ start = getCommentEnd(document, start + 1, end);
+ } else if (next == '/') {
+ // '//'-comment: nothing to do anymore on this line
+ start = end;
+ }
+ }
+ break;
+ case '*':
+ if (start < end) {
+ char next = document.getChar(start);
+ if (next == '/') {
+ // we have been in a comment: forget what we read before
+ charCount = 0;
+ ++start;
+ }
+ }
+ break;
+ case '"':
+ case '\'':
+ start = getStringEnd(document, start, end, curr);
+ break;
+ default:
+
+ if (considerNesting) {
+
+ if ('(' == curr)
+ ++nestingLevel;
+ else if (')' == curr)
+ --nestingLevel;
+
+ if (nestingLevel != 0)
+ break;
+ }
+
+ if (increments.indexOf(curr) >= 0) {
+ ++charCount;
+ }
+
+ if (decrements.indexOf(curr) >= 0) {
+ --charCount;
+ }
+ }
+ }
+
+ return charCount;
+ }
+
+ /**
+ * @see IContextInformationValidator#isContextInformationValid(int)
+ */
+ public boolean isContextInformationValid(int position) {
+
+ try {
+ if (position < fPosition)
+ return false;
+
+ IDocument document = fViewer.getDocument();
+ IRegion line = document.getLineInformationOfOffset(fPosition);
+
+ if (position < line.getOffset() || position >= document.getLength())
+ return false;
+
+ return getCharCount(document, fPosition, position,
+ "(<", ")>", false) >= 0; //$NON-NLS-1$//$NON-NLS-2$
+
+ } catch (BadLocationException x) {
+ return false;
+ }
+ }
+
+ /**
+ * @see IContextInformationPresenter#updatePresentation(int,
+ * TextPresentation)
+ */
+ public boolean updatePresentation(int position,
+ TextPresentation presentation) {
+
+ int currentParameter = -1;
+
+ try {
+ currentParameter = getCharCount(fViewer.getDocument(), fPosition,
+ position, ",", "", true); //$NON-NLS-1$//$NON-NLS-2$
+ } catch (BadLocationException x) {
+ return false;
+ }
+
+ if (fCurrentParameter != -1) {
+ if (currentParameter == fCurrentParameter)
+ return false;
+ }
+
+ presentation.clear();
+ fCurrentParameter = currentParameter;
+
+ String s = fInformation.getInformationDisplayString();
+ int start = 0;
+ int occurrences = 0;
+ while (occurrences < fCurrentParameter) {
+ int found = s.indexOf(',', start);
+ if (found == -1)
+ break;
+ start = found + 1;
+ ++occurrences;
+ }
+
+ if (occurrences < fCurrentParameter) {
+ presentation.addStyleRange(new StyleRange(0, s.length(), null,
+ null, SWT.NORMAL));
+ return true;
+ }
+
+ if (start == -1)
+ start = 0;
+
+ int end = s.indexOf(',', start);
+ if (end == -1)
+ end = s.length();
+
+ if (start > 0)
+ presentation.addStyleRange(new StyleRange(0, start, null, null,
+ SWT.NORMAL));
+
+ if (end > start)
+ presentation.addStyleRange(new StyleRange(start, end - start, null,
+ null, SWT.BOLD));
+
+ if (end < s.length())
+ presentation.addStyleRange(new StyleRange(end, s.length() - end,
+ null, null, SWT.NORMAL));
+
+ return true;
+ }
+}