X-Git-Url: http://secure.phpeclipse.com

diff --git a/net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpdt/internal/ui/text/JavaWordIterator.java b/net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpdt/internal/ui/text/JavaWordIterator.java
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+++ b/net.sourceforge.phpeclipse.ui/src/net/sourceforge/phpdt/internal/ui/text/JavaWordIterator.java
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+/*******************************************************************************
+ * Copyright (c) 2000, 2004 IBM Corporation 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:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package net.sourceforge.phpdt.internal.ui.text;
+
+import java.text.BreakIterator;
+import java.text.CharacterIterator;
+
+import org.eclipse.jface.text.Assert;
+
+/**
+ * Breaks java text into word starts, also stops at line start and end. No
+ * direction dependency.
+ * 
+ * @since 3.0
+ */
+public class JavaWordIterator extends BreakIterator {
+
+	/**
+	 * The underlying java break iterator. It returns all breaks, including
+	 * before and after every whitespace.
+	 */
+	private JavaBreakIterator fIterator;
+
+	/** The current index for the stateful operations. */
+	private int fIndex;
+
+	/**
+	 * Creates a new word iterator.
+	 */
+	public JavaWordIterator() {
+		fIterator = new JavaBreakIterator();
+		first();
+	}
+
+	/*
+	 * @see java.text.BreakIterator#first()
+	 */
+	public int first() {
+		fIndex = fIterator.first();
+		return fIndex;
+	}
+
+	/*
+	 * @see java.text.BreakIterator#last()
+	 */
+	public int last() {
+		fIndex = fIterator.last();
+		return fIndex;
+	}
+
+	/*
+	 * @see java.text.BreakIterator#next(int)
+	 */
+	public int next(int n) {
+		int next = 0;
+		while (--n > 0 && next != DONE) {
+			next = next();
+		}
+		return next;
+	}
+
+	/*
+	 * @see java.text.BreakIterator#next()
+	 */
+	public int next() {
+		fIndex = following(fIndex);
+		return fIndex;
+	}
+
+	/*
+	 * @see java.text.BreakIterator#previous()
+	 */
+	public int previous() {
+		fIndex = preceding(fIndex);
+		return fIndex;
+	}
+
+	/*
+	 * @see java.text.BreakIterator#preceding(int)
+	 */
+	public int preceding(int offset) {
+		int first = fIterator.preceding(offset);
+		if (isWhitespace(first, offset)) {
+			int second = fIterator.preceding(first);
+			if (second != DONE && !isDelimiter(second, first))
+				return second;
+		}
+		return first;
+	}
+
+	/*
+	 * @see java.text.BreakIterator#following(int)
+	 */
+	public int following(int offset) {
+		int first = fIterator.following(offset);
+		if (eatFollowingWhitespace(offset, first)) {
+			int second = fIterator.following(first);
+			if (isWhitespace(first, second))
+				return second;
+		}
+		return first;
+	}
+
+	private boolean eatFollowingWhitespace(int offset, int exclusiveEnd) {
+		if (exclusiveEnd == DONE || offset == DONE)
+			return false;
+
+		if (isWhitespace(offset, exclusiveEnd))
+			return false;
+		if (isDelimiter(offset, exclusiveEnd))
+			return false;
+
+		return true;
+	}
+
+	/**
+	 * Returns <code>true</code> if the given sequence into the underlying
+	 * text represents a delimiter, <code>false</code> otherwise.
+	 * 
+	 * @param offset
+	 *            the offset
+	 * @param exclusiveEnd
+	 *            the end offset
+	 * @return <code>true</code> if the given range is a delimiter
+	 */
+	private boolean isDelimiter(int offset, int exclusiveEnd) {
+		if (exclusiveEnd == DONE || offset == DONE)
+			return false;
+
+		Assert.isTrue(offset >= 0);
+		Assert.isTrue(exclusiveEnd <= getText().getEndIndex());
+		Assert.isTrue(exclusiveEnd > offset);
+
+		CharSequence seq = fIterator.fText;
+
+		while (offset < exclusiveEnd) {
+			char ch = seq.charAt(offset);
+			if (ch != '\n' && ch != '\r')
+				return false;
+			offset++;
+		}
+
+		return true;
+	}
+
+	/**
+	 * Returns <code>true</code> if the given sequence into the underlying
+	 * text represents whitespace, but not a delimiter, <code>false</code>
+	 * otherwise.
+	 * 
+	 * @param offset
+	 *            the offset
+	 * @param exclusiveEnd
+	 *            the end offset
+	 * @return <code>true</code> if the given range is whitespace
+	 */
+	private boolean isWhitespace(int offset, int exclusiveEnd) {
+		if (exclusiveEnd == DONE || offset == DONE)
+			return false;
+
+		Assert.isTrue(offset >= 0);
+		Assert.isTrue(exclusiveEnd <= getText().getEndIndex());
+		Assert.isTrue(exclusiveEnd > offset);
+
+		CharSequence seq = fIterator.fText;
+
+		while (offset < exclusiveEnd) {
+			char ch = seq.charAt(offset);
+			if (!Character.isWhitespace(ch))
+				return false;
+			if (ch == '\n' || ch == '\r')
+				return false;
+			offset++;
+		}
+
+		return true;
+	}
+
+	/*
+	 * @see java.text.BreakIterator#current()
+	 */
+	public int current() {
+		return fIndex;
+	}
+
+	/*
+	 * @see java.text.BreakIterator#getText()
+	 */
+	public CharacterIterator getText() {
+		return fIterator.getText();
+	}
+
+	/**
+	 * Sets the text as <code>CharSequence</code>.
+	 * 
+	 * @param newText
+	 *            the new text
+	 */
+	public void setText(CharSequence newText) {
+		fIterator.setText(newText);
+		first();
+	}
+
+	/*
+	 * @see java.text.BreakIterator#setText(java.text.CharacterIterator)
+	 */
+	public void setText(CharacterIterator newText) {
+		fIterator.setText(newText);
+		first();
+	}
+
+	/*
+	 * @see java.text.BreakIterator#setText(java.lang.String)
+	 */
+	public void setText(String newText) {
+		setText((CharSequence) newText);
+	}
+
+}