1) Moved net.sourceforge.phpeclipse.ui\src\net\sourceforge\phpdt back to net.sourcefo...

[phpeclipse.git] / net.sourceforge.phpeclipse / src / net / sourceforge / phpdt / internal / ui / text / SequenceCharacterIterator.java

diff --git a/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/ui/text/SequenceCharacterIterator.java b/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/ui/text/SequenceCharacterIterator.java
new file mode 100644 (file)
index 0000000..d718393
--- /dev/null
+++ b/net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/ui/text/SequenceCharacterIterator.java
@@ -0,0 +1,181 @@
+/*******************************************************************************
+ * 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.CharacterIterator;
+
+//incastrix
+//import org.eclipse.jface.text.Assert;
+import org.eclipse.core.runtime.Assert;
+
+/**
+ * A <code>CharSequence</code> based implementation of
+ * <code>CharacterIterator</code>.
+ * 
+ * @since 3.0
+ */
+public class SequenceCharacterIterator implements CharacterIterator {
+
+       private int fIndex = -1;
+
+       private final CharSequence fSequence;
+
+       private final int fFirst;
+
+       private final int fLast;
+
+       private void invariant() {
+               Assert.isTrue(fIndex >= fFirst);
+               Assert.isTrue(fIndex <= fLast);
+       }
+
+       /**
+        * Creates an iterator for the entire sequence.
+        * 
+        * @param sequence
+        *            the sequence backing this iterator
+        */
+       public SequenceCharacterIterator(CharSequence sequence) {
+               this(sequence, 0);
+       }
+
+       /**
+        * Creates an iterator.
+        * 
+        * @param sequence
+        *            the sequence backing this iterator
+        * @param first
+        *            the first character to consider
+        * @throws IllegalArgumentException
+        *             if the indices are out of bounds
+        */
+       public SequenceCharacterIterator(CharSequence sequence, int first)
+                       throws IllegalArgumentException {
+               this(sequence, first, sequence.length());
+       }
+
+       /**
+        * Creates an iterator.
+        * 
+        * @param sequence
+        *            the sequence backing this iterator
+        * @param first
+        *            the first character to consider
+        * @param last
+        *            the last character index to consider
+        * @throws IllegalArgumentException
+        *             if the indices are out of bounds
+        */
+       public SequenceCharacterIterator(CharSequence sequence, int first, int last)
+                       throws IllegalArgumentException {
+               if (sequence == null)
+                       throw new NullPointerException();
+               if (first < 0 || first > last)
+                       throw new IllegalArgumentException();
+               if (last > sequence.length())
+                       throw new IllegalArgumentException();
+               fSequence = sequence;
+               fFirst = first;
+               fLast = last;
+               fIndex = first;
+               invariant();
+       }
+
+       /*
+        * @see java.text.CharacterIterator#first()
+        */
+       public char first() {
+               return setIndex(getBeginIndex());
+       }
+
+       /*
+        * @see java.text.CharacterIterator#last()
+        */
+       public char last() {
+               if (fFirst == fLast)
+                       return setIndex(getEndIndex());
+               else
+                       return setIndex(getEndIndex() - 1);
+       }
+
+       /*
+        * @see java.text.CharacterIterator#current()
+        */
+       public char current() {
+               if (fIndex >= fFirst && fIndex < fLast)
+                       return fSequence.charAt(fIndex);
+               else
+                       return DONE;
+       }
+
+       /*
+        * @see java.text.CharacterIterator#next()
+        */
+       public char next() {
+               return setIndex(Math.min(fIndex + 1, getEndIndex()));
+       }
+
+       /*
+        * @see java.text.CharacterIterator#previous()
+        */
+       public char previous() {
+               if (fIndex > getBeginIndex()) {
+                       return setIndex(fIndex - 1);
+               } else {
+                       return DONE;
+               }
+       }
+
+       /*
+        * @see java.text.CharacterIterator#setIndex(int)
+        */
+       public char setIndex(int position) {
+               if (position >= getBeginIndex() && position <= getEndIndex())
+                       fIndex = position;
+               else
+                       throw new IllegalArgumentException();
+
+               invariant();
+               return current();
+       }
+
+       /*
+        * @see java.text.CharacterIterator#getBeginIndex()
+        */
+       public int getBeginIndex() {
+               return fFirst;
+       }
+
+       /*
+        * @see java.text.CharacterIterator#getEndIndex()
+        */
+       public int getEndIndex() {
+               return fLast;
+       }
+
+       /*
+        * @see java.text.CharacterIterator#getIndex()
+        */
+       public int getIndex() {
+               return fIndex;
+       }
+
+       /*
+        * @see java.text.CharacterIterator#clone()
+        */
+       public Object clone() {
+               try {
+                       return super.clone();
+               } catch (CloneNotSupportedException e) {
+                       throw new InternalError();
+               }
+       }
+}