+++ /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;
-
-import org.eclipse.jface.text.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;
- }
-}
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