--- /dev/null
+/*
+ * Copyright (c) 2003-2004 Christopher Lenz and others.
+ * All rights reserved. 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
+ *
+ * Contributors:
+ * Christopher Lenz - initial API and implementation
+ *
+ * $Id: CssTextUtils.java,v 1.1 2004-09-02 18:07:13 jsurfer Exp $
+ */
+
+package net.sourceforge.phpeclipse.css.core.internal.text;
+
+import java.io.IOException;
+
+import net.sourceforge.phpeclipse.css.core.CssCore;
+
+import org.eclipse.jface.text.IDocument;
+
+/**
+ * Various utility methods for handling CSS source.
+ *
+ * TODO Probably refactor so this class isn't needed
+ */
+public final class CssTextUtils {
+
+ // Constructors ------------------------------------------------------------
+
+ /**
+ * Hidden.
+ */
+ private CssTextUtils() {
+ // Hidden
+ }
+
+ // Public Methods ----------------------------------------------------------
+
+ public static int findMatchingClosingPeer(IDocument document, int offset,
+ char openingPeer) {
+ try {
+ CssCodeReader reader = new CssCodeReader(document, offset,
+ document.getLength(), CssCodeReader.FORWARD);
+ char closingChar = getPeerCharacter(openingPeer);
+ int stack = 1;
+ int c = reader.read();
+ while (c != -1) {
+ if ((c == openingPeer) && (c != closingChar)) {
+ stack++;
+ } else if (c == closingChar) {
+ stack--;
+ }
+ if (stack == 0) {
+ return reader.getOffset();
+ }
+ c = reader.read();
+ }
+ } catch (IOException e) {
+ CssCore.log(
+ "Failed to find matching closing peer for '" + //$NON-NLS-1$
+ openingPeer + '\'', e);
+ }
+ return -1;
+ }
+
+ public static int findMatchingOpeningPeer(IDocument document, int offset,
+ char closingPeer) {
+ try {
+ CssCodeReader reader = new CssCodeReader(document, offset + 1,
+ document.getLength(), CssCodeReader.BACKWARD);
+ char openingChar = getPeerCharacter(closingPeer);
+ int stack = 1;
+ int c = reader.read();
+ while (c != -1) {
+ if ((c == closingPeer) && (c != openingChar)) {
+ stack++;
+ } else if (c == openingChar) {
+ stack--;
+ }
+ if (stack == 0) {
+ return reader.getOffset();
+ }
+ c = reader.read();
+ }
+ } catch (IOException e) {
+ CssCore.log(
+ "Failed to find matching opening peer for '" + //$NON-NLS-1$
+ closingPeer + '\'', e);
+ }
+ return -1;
+ }
+
+ public static char getPeerCharacter(char c) {
+ switch (c) {
+ case '{': return '}';
+ case '}': return '{';
+ case '[': return ']';
+ case ']': return '[';
+ case '(': return ')';
+ case ')': return '(';
+ case '"': return '"';
+ case '\'': return '\'';
+ default: return 0;
+ }
+ }
+
+ public static boolean isCssIdentifierPart(char c) {
+ return ((c == '_') || Character.isLetterOrDigit(c) || (c == '-'));
+ }
+
+ public static boolean isCssIdentifierStart(char c) {
+ return ((c == '_') || Character.isLetter(c));
+ }
+
+ public static boolean isCssNumberPart(char c) {
+ return ((c == '.') || Character.isDigit(c));
+ }
+
+ public static boolean isCssNumberStart(char c) {
+ return ((c == '-') || (c == '.') || Character.isDigit(c));
+ }
+
+ public static boolean isCssWhitespace(char c) {
+ return Character.isWhitespace(c);
+ }
+
+}