| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 2001-2002 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Xerces" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache\@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * nor may "Apache" appear in their name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation, and was |
| * originally based on software copyright (c) 2001, International |
| * Business Machines, Inc., http://www.ibm.com . For more information |
| * on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| |
| /* |
| * $Log$ |
| * Revision 1.2 2002/02/04 21:20:59 tng |
| * Add DOM 2 Level missing functions: |
| * 1. NodeIterator::getRoot |
| * 2. TreeWalker::getRoot |
| * 3. Element::hasAttribute |
| * 4. Element::hasAttributeNS |
| * 5. Node::hasAttributes |
| * 6. Node::isSupported |
| * |
| * Revision 1.1.1.1 2002/02/01 22:21:56 peiyongz |
| * sane_include |
| * |
| * Revision 1.3 2001/06/04 20:11:53 tng |
| * IDOM: Complete IDNodeIterator, IDTreeWalker, IDNodeFilter. |
| * |
| * Revision 1.2 2001/05/11 13:25:56 tng |
| * Copyright update. |
| * |
| * Revision 1.1.1.1 2001/04/03 00:14:33 andyh |
| * IDOM |
| * |
| */ |
| |
| #ifndef IDOM_TreeWalker_HEADER_GUARD_ |
| #define IDOM_TreeWalker_HEADER_GUARD_ |
| |
| #include "IDOM_Node.hpp" |
| #include "IDOM_NodeFilter.hpp" |
| |
| |
| /** |
| * <code>IDOM_TreeWalker</code> objects are used to navigate a document tree or |
| * subtree using the view of the document defined by its <code>whatToShow</code> |
| * flags and any filters that are defined for the <code>IDOM_TreeWalker</code>. Any |
| * function which performs navigation using a <code>IDOM_TreeWalker</code> will |
| * automatically support any view defined by a <code>IDOM_TreeWalker</code>. |
| * |
| * Omitting nodes from the logical view of a subtree can result in a structure that is |
| * substantially different from the same subtree in the complete, unfiltered document. Nodes |
| * that are siblings in the IDOM_TreeWalker view may be children of different, widely separated |
| * nodes in the original view. For instance, consider a Filter that skips all nodes except for |
| * Text nodes and the root node of a document. In the logical view that results, all text |
| * nodes will be siblings and appear as direct children of the root node, no matter how |
| * deeply nested the structure of the original document. |
| * |
| */ |
| class CDOM_EXPORT IDOM_TreeWalker { |
| protected: |
| IDOM_TreeWalker() {}; |
| IDOM_TreeWalker(const IDOM_TreeWalker &other) {}; |
| IDOM_TreeWalker & operator = (const IDOM_TreeWalker &other) {return *this;}; |
| |
| public: |
| /** @name Get functions. */ |
| //@{ |
| /** |
| * The <code>root</code> node of the <code>TreeWalker</code>, as specified |
| * when it was created. |
| */ |
| virtual IDOM_Node* getRoot() = 0; |
| /** |
| * Return which node types are presented via the IDOM_TreeWalker. |
| * These constants are defined in the IDOM_NodeFilter interface. |
| * |
| */ |
| virtual unsigned long getWhatToShow()= 0; |
| |
| /** |
| * Return The filter used to screen nodes. |
| * |
| */ |
| virtual IDOM_NodeFilter* getFilter()= 0; |
| |
| /** |
| * Return the expandEntityReferences flag. |
| * The value of this flag determines whether the children of entity reference |
| * nodes are visible to the IDOM_TreeWalker. If false, they will be skipped over. |
| * |
| */ |
| virtual bool getExpandEntityReferences()= 0; |
| |
| /** |
| * Return the node at which the IDOM_TreeWalker is currently positioned. |
| * |
| */ |
| virtual IDOM_Node* getCurrentNode()= 0; |
| |
| /** |
| * Moves to and returns the closest visible ancestor node of the current node. |
| * If the search for parentNode attempts to step upward from the IDOM_TreeWalker's root |
| * node, or if it fails to find a visible ancestor node, this method retains the |
| * current position and returns null. |
| * |
| */ |
| virtual IDOM_Node* parentNode()= 0; |
| |
| /** |
| * Moves the <code>IDOM_TreeWalker</code> to the first child of the current node, |
| * and returns the new node. If the current node has no children, returns |
| * <code>null</code>, and retains the current node. |
| * |
| */ |
| virtual IDOM_Node* firstChild()= 0; |
| |
| /** |
| * Moves the <code>IDOM_TreeWalker</code> to the last child of the current node, and |
| * returns the new node. If the current node has no children, returns |
| * <code>null</code>, and retains the current node. |
| * |
| */ |
| virtual IDOM_Node* lastChild()= 0; |
| |
| /** |
| * Moves the <code>IDOM_TreeWalker</code> to the previous sibling of the current |
| * node, and returns the new node. If the current node has no previous sibling, |
| * returns <code>null</code>, and retains the current node. |
| * |
| */ |
| virtual IDOM_Node* previousSibling()= 0; |
| |
| /** |
| * Moves the <code>IDOM_TreeWalker</code> to the next sibling of the current node, |
| * and returns the new node. If the current node has no next sibling, returns |
| * <code>null</code>, and retains the current node. |
| * |
| */ |
| virtual IDOM_Node* nextSibling()= 0; |
| |
| /** |
| * Moves the <code>IDOM_TreeWalker</code> to the previous visible node in document |
| * order relative to the current node, and returns the new node. If the current |
| * node has no previous node, |
| * or if the search for previousNode attempts to step upward from the IDOM_TreeWalker's |
| * root node, returns <code>null</code>, and retains the current node. |
| * |
| */ |
| virtual IDOM_Node* previousNode()= 0; |
| |
| /** |
| * Moves the <code>IDOM_TreeWalker</code> to the next visible node in document order |
| * relative to the current node, and returns the new node. If the current node has |
| * no next node, |
| * or if the search for nextNode attempts to step upward from the IDOM_TreeWalker's |
| * root node, returns <code>null</code>, and retains the current node. |
| * |
| */ |
| virtual IDOM_Node* nextNode()= 0; |
| //@} |
| |
| /** @name Set functions. */ |
| //@{ |
| /** |
| * Set the node at which the IDOM_TreeWalker is currently positioned. |
| * |
| */ |
| virtual void setCurrentNode(IDOM_Node* currentNode)= 0; |
| //@} |
| }; |
| |
| #endif |
