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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* nsISupportsIterators.idl --- IDL defining general purpose iterators */
+
+
+#include "nsISupports.idl"
+
+
+ /*
+ ...
+ */
+
+
+ /**
+ * ...
+ */
+[scriptable, uuid(7330650e-1dd2-11b2-a0c2-9ff86ee97bed)]
+interface nsIOutputIterator : nsISupports
+ {
+ /**
+ * Put |anElementToPut| into the underlying container or sequence at the position currently pointed to by this iterator.
+ * The iterator and the underlying container or sequence cooperate to |Release()|
+ * the replaced element, if any and if necessary, and to |AddRef()| the new element.
+ *
+ * The result is undefined if this iterator currently points outside the
+ * useful range of the underlying container or sequence.
+ *
+ * @param anElementToPut the element to place into the underlying container or sequence
+ */
+ void putElement( in nsISupports anElementToPut );
+
+ /**
+ * Advance this iterator to the next position in the underlying container or sequence.
+ */
+ void stepForward();
+ };
+
+ /**
+ * ...
+ */
+[scriptable, uuid(85585e12-1dd2-11b2-a930-f6929058269a)]
+interface nsIInputIterator : nsISupports
+ {
+ /**
+ * Retrieve (and |AddRef()|) the element this iterator currently points to.
+ *
+ * The result is undefined if this iterator currently points outside the
+ * useful range of the underlying container or sequence.
+ *
+ * @result a new reference to the element this iterator currently points to (if any)
+ */
+ nsISupports getElement();
+
+ /**
+ * Advance this iterator to the next position in the underlying container or sequence.
+ */
+ void stepForward();
+
+ /**
+ * Test if |anotherIterator| points to the same position in the underlying container or sequence.
+ *
+ * The result is undefined if |anotherIterator| was not created by or for the same underlying container or sequence.
+ *
+ * @param anotherIterator another iterator to compare against, created by or for the same underlying container or sequence
+ * @result true if |anotherIterator| points to the same position in the underlying container or sequence
+ */
+ boolean isEqualTo( in nsISupports anotherIterator );
+
+ /**
+ * Create a new iterator pointing to the same position in the underlying container or sequence to which this iterator currently points.
+ * The returned iterator is suitable for use in a subsequent call to |isEqualTo()| against this iterator.
+ *
+ * @result a new iterator pointing at the same position in the same underlying container or sequence as this iterator
+ */
+ nsISupports clone();
+ };
+
+ /**
+ * ...
+ */
+[scriptable, uuid(8da01646-1dd2-11b2-98a7-c7009045be7e)]
+interface nsIForwardIterator : nsISupports
+ {
+ /**
+ * Retrieve (and |AddRef()|) the element this iterator currently points to.
+ *
+ * The result is undefined if this iterator currently points outside the
+ * useful range of the underlying container or sequence.
+ *
+ * @result a new reference to the element this iterator currently points to (if any)
+ */
+ nsISupports getElement();
+
+ /**
+ * Put |anElementToPut| into the underlying container or sequence at the position currently pointed to by this iterator.
+ * The iterator and the underlying container or sequence cooperate to |Release()|
+ * the replaced element, if any and if necessary, and to |AddRef()| the new element.
+ *
+ * The result is undefined if this iterator currently points outside the
+ * useful range of the underlying container or sequence.
+ *
+ * @param anElementToPut the element to place into the underlying container or sequence
+ */
+ void putElement( in nsISupports anElementToPut );
+
+ /**
+ * Advance this iterator to the next position in the underlying container or sequence.
+ */
+ void stepForward();
+
+ /**
+ * Test if |anotherIterator| points to the same position in the underlying container or sequence.
+ *
+ * The result is undefined if |anotherIterator| was not created by or for the same underlying container or sequence.
+ *
+ * @param anotherIterator another iterator to compare against, created by or for the same underlying container or sequence
+ * @result true if |anotherIterator| points to the same position in the underlying container or sequence
+ */
+ boolean isEqualTo( in nsISupports anotherIterator );
+
+ /**
+ * Create a new iterator pointing to the same position in the underlying container or sequence to which this iterator currently points.
+ * The returned iterator is suitable for use in a subsequent call to |isEqualTo()| against this iterator.
+ *
+ * @result a new iterator pointing at the same position in the same underlying container or sequence as this iterator
+ */
+ nsISupports clone();
+ };
+
+ /**
+ * ...
+ */
+[scriptable, uuid(948defaa-1dd1-11b2-89f6-8ce81f5ebda9)]
+interface nsIBidirectionalIterator : nsISupports
+ {
+ /**
+ * Retrieve (and |AddRef()|) the element this iterator currently points to.
+ *
+ * The result is undefined if this iterator currently points outside the
+ * useful range of the underlying container or sequence.
+ *
+ * @result a new reference to the element this iterator currently points to (if any)
+ */
+ nsISupports getElement();
+
+ /**
+ * Put |anElementToPut| into the underlying container or sequence at the position currently pointed to by this iterator.
+ * The iterator and the underlying container or sequence cooperate to |Release()|
+ * the replaced element, if any and if necessary, and to |AddRef()| the new element.
+ *
+ * The result is undefined if this iterator currently points outside the
+ * useful range of the underlying container or sequence.
+ *
+ * @param anElementToPut the element to place into the underlying container or sequence
+ */
+ void putElement( in nsISupports anElementToPut );
+
+ /**
+ * Advance this iterator to the next position in the underlying container or sequence.
+ */
+ void stepForward();
+
+ /**
+ * Move this iterator to the previous position in the underlying container or sequence.
+ */
+ void stepBackward();
+
+ /**
+ * Test if |anotherIterator| points to the same position in the underlying container or sequence.
+ *
+ * The result is undefined if |anotherIterator| was not created by or for the same underlying container or sequence.
+ *
+ * @param anotherIterator another iterator to compare against, created by or for the same underlying container or sequence
+ * @result true if |anotherIterator| points to the same position in the underlying container or sequence
+ */
+ boolean isEqualTo( in nsISupports anotherIterator );
+
+ /**
+ * Create a new iterator pointing to the same position in the underlying container or sequence to which this iterator currently points.
+ * The returned iterator is suitable for use in a subsequent call to |isEqualTo()| against this iterator.
+ *
+ * @result a new iterator pointing at the same position in the same underlying container or sequence as this iterator
+ */
+ nsISupports clone();
+ };
+
+ /**
+ * ...
+ */
+[scriptable, uuid(9bd6fdb0-1dd1-11b2-9101-d15375968230)]
+interface nsIRandomAccessIterator : nsISupports
+ {
+ /**
+ * Retrieve (and |AddRef()|) the element this iterator currently points to.
+ *
+ * The result is undefined if this iterator currently points outside the
+ * useful range of the underlying container or sequence.
+ *
+ * @result a new reference to the element this iterator currently points to (if any)
+ */
+ nsISupports getElement();
+
+ /**
+ * Retrieve (and |AddRef()|) an element at some offset from where this iterator currently points.
+ * The offset may be negative. |getElementAt(0)| is equivalent to |getElement()|.
+ *
+ * The result is undefined if this iterator currently points outside the
+ * useful range of the underlying container or sequence.
+ *
+ * @param anOffset a |0|-based offset from the position to which this iterator currently points
+ * @result a new reference to the indicated element (if any)
+ */
+ nsISupports getElementAt( in int32_t anOffset );
+
+ /**
+ * Put |anElementToPut| into the underlying container or sequence at the position currently pointed to by this iterator.
+ * The iterator and the underlying container or sequence cooperate to |Release()|
+ * the replaced element, if any and if necessary, and to |AddRef()| the new element.
+ *
+ * The result is undefined if this iterator currently points outside the
+ * useful range of the underlying container or sequence.
+ *
+ * @param anElementToPut the element to place into the underlying container or sequence
+ */
+ void putElement( in nsISupports anElementToPut );
+
+ /**
+ * Put |anElementToPut| into the underlying container or sequence at the position |anOffset| away from that currently pointed to by this iterator.
+ * The iterator and the underlying container or sequence cooperate to |Release()|
+ * the replaced element, if any and if necessary, and to |AddRef()| the new element.
+ * |putElementAt(0, obj)| is equivalent to |putElement(obj)|.
+ *
+ * The result is undefined if this iterator currently points outside the
+ * useful range of the underlying container or sequence.
+ *
+ * @param anOffset a |0|-based offset from the position to which this iterator currently points
+ * @param anElementToPut the element to place into the underlying container or sequence
+ */
+ void putElementAt( in int32_t anOffset, in nsISupports anElementToPut );
+
+ /**
+ * Advance this iterator to the next position in the underlying container or sequence.
+ */
+ void stepForward();
+
+ /**
+ * Move this iterator by |anOffset| positions in the underlying container or sequence.
+ * |anOffset| may be negative. |stepForwardBy(1)| is equivalent to |stepForward()|.
+ * |stepForwardBy(0)| is a no-op.
+ *
+ * @param anOffset a |0|-based offset from the position to which this iterator currently points
+ */
+ void stepForwardBy( in int32_t anOffset );
+
+ /**
+ * Move this iterator to the previous position in the underlying container or sequence.
+ */
+ void stepBackward();
+
+ /**
+ * Move this iterator backwards by |anOffset| positions in the underlying container or sequence.
+ * |anOffset| may be negative. |stepBackwardBy(1)| is equivalent to |stepBackward()|.
+ * |stepBackwardBy(n)| is equivalent to |stepForwardBy(-n)|. |stepBackwardBy(0)| is a no-op.
+ *
+ * @param anOffset a |0|-based offset from the position to which this iterator currently points
+ */
+ void stepBackwardBy( in int32_t anOffset );
+
+ /**
+ * Test if |anotherIterator| points to the same position in the underlying container or sequence.
+ *
+ * The result is undefined if |anotherIterator| was not created by or for the same underlying container or sequence.
+ *
+ * @param anotherIterator another iterator to compare against, created by or for the same underlying container or sequence
+ * @result true if |anotherIterator| points to the same position in the underlying container or sequence
+ */
+ boolean isEqualTo( in nsISupports anotherIterator );
+
+ /**
+ * Create a new iterator pointing to the same position in the underlying container or sequence to which this iterator currently points.
+ * The returned iterator is suitable for use in a subsequent call to |isEqualTo()| against this iterator.
+ *
+ * @result a new iterator pointing at the same position in the same underlying container or sequence as this iterator
+ */
+ nsISupports clone();
+ };
+
+%{C++
+%}