| /* $Id$ */ |
| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * |
| * Copyright (c) 2000 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) 1999, International |
| * Business Machines, Inc., http://www.apache.org. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| |
| package org.apache.xerces.dom; |
| |
| import java.io.*; |
| |
| import org.w3c.dom.*; |
| import org.w3c.dom.events.*; |
| import org.apache.xerces.dom.*; |
| import org.apache.xerces.dom.events.*; |
| |
| /** |
| * If we had multiple inheritance ChildAndParentNode would simply inherit both |
| * from ChildNode and ParentNode. In this case it only inherits from |
| * ChildNode and all the code of ParentNode is duplicated here (bummer :-( |
| * <P> |
| */ |
| public abstract class ChildAndParentNode |
| extends ChildNode { |
| |
| /** Serialization version. */ |
| static final long serialVersionUID = 0; |
| |
| /** Owner document. */ |
| protected DocumentImpl ownerDocument; |
| |
| protected ChildNode children []; |
| protected int length; |
| |
| // |
| // Constructors |
| // |
| |
| /** |
| * No public constructor; only subclasses of ParentNode should be |
| * instantiated, and those normally via a Document's factory methods |
| */ |
| protected ChildAndParentNode(DocumentImpl ownerDocument) { |
| super(ownerDocument); |
| this.ownerDocument = ownerDocument; |
| } |
| |
| /** Constructor for serialization. */ |
| public ChildAndParentNode() {} |
| |
| /** |
| * Called to minimize space utilization. Affects only |
| * this node; children must be individually trimmed. |
| */ |
| public void trimToSize () |
| { |
| if (length == 0) |
| children = null; |
| else if (children.length != length) { |
| ChildNode temp [] = new ChildNode [length]; |
| |
| System.arraycopy (children, 0, temp, 0, length); |
| children = temp; |
| } |
| } |
| |
| public void reduceWaste () |
| { |
| if (children == null) |
| return; |
| |
| // |
| // Arbitrary -- rather than paying trimToSize() costs |
| // on most elements, we routinely accept some waste but |
| // do try to reduce egregious waste. Interacts with |
| // the array allocation done in appendChild. |
| // |
| if ((children.length - length) > 6) |
| trimToSize (); |
| } |
| |
| /** |
| * Returns the index of the node in the list of children, such |
| * that <em>item()</em> will return that child. |
| * |
| * @param maybeChild the node which may be a child of this one |
| * @return the index of the node in the set of children, or |
| * else -1 if that node is not a child |
| */ |
| final protected int getIndexOf(Node maybeChild) |
| { |
| for (int i = 0; i < length; i++) |
| if (children[i] == maybeChild) |
| return i; |
| return -1; |
| } |
| |
| // |
| // NodeList methods |
| // |
| |
| /** |
| * Returns a duplicate of a given node. You can consider this a |
| * generic "copy constructor" for nodes. The newly returned object should |
| * be completely independent of the source object's subtree, so changes |
| * in one after the clone has been made will not affect the other. |
| * <p> |
| * Example: Cloning a Text node will copy both the node and the text it |
| * contains. |
| * <p> |
| * Example: Cloning something that has children -- Element or Attr, for |
| * example -- will _not_ clone those children unless a "deep clone" |
| * has been requested. A shallow clone of an Attr node will yield an |
| * empty Attr of the same name. |
| * <p> |
| * NOTE: Clones will always be read/write, even if the node being cloned |
| * is read-only, to permit applications using only the DOM API to obtain |
| * editable copies of locked portions of the tree. |
| */ |
| public Node cloneNode(boolean deep) { |
| |
| ChildAndParentNode newnode = (ChildAndParentNode)super.cloneNode(deep); |
| |
| // set owner document |
| newnode.ownerDocument = ownerDocument; |
| |
| // REVISIT: Do we need to synchronize at this point? -Ac |
| if (needsSyncChildren()) { |
| synchronizeChildren(); |
| } |
| |
| // Need to break the association w/ original kids |
| newnode.children = null; |
| newnode.length = 0; |
| |
| // Then, if deep, clone the kids too. |
| if (deep) { |
| for (int i = 0; i < length; i++) { |
| newnode.appendChild(children[i].cloneNode(true)); |
| } |
| } |
| |
| return newnode; |
| |
| } // cloneNode(boolean):Node |
| |
| /** |
| * Find the Document that this Node belongs to (the document in |
| * whose context the Node was created). The Node may or may not |
| * currently be part of that Document's actual contents. |
| */ |
| public Document getOwnerDocument() { |
| return ownerDocument; |
| } |
| |
| /** |
| * same as above but returns internal type and this one is not overridden |
| * by DocumentImpl to return null |
| */ |
| DocumentImpl ownerDocument() { |
| return ownerDocument; |
| } |
| |
| /** |
| * NON-DOM |
| * set the ownerDocument of this node and its children |
| */ |
| void setOwnerDocument(DocumentImpl doc) { |
| if (needsSyncChildren()) { |
| synchronizeChildren(); |
| } |
| ownerDocument = doc; |
| for (int i = 0; i < length; i++) { |
| children[i].setOwnerDocument(doc); |
| } |
| ownerDocument = doc; |
| } |
| |
| /** |
| * Test whether this node has any children. Convenience shorthand |
| * for (Node.getFirstChild()!=null) |
| */ |
| public boolean hasChildNodes() { |
| if (needsSyncChildren()) { |
| synchronizeChildren(); |
| } |
| return length > 0; |
| } |
| |
| /** |
| * Obtain a NodeList enumerating all children of this node. If there |
| * are none, an (initially) empty NodeList is returned. |
| * <p> |
| * NodeLists are "live"; as children are added/removed the NodeList |
| * will immediately reflect those changes. Also, the NodeList refers |
| * to the actual nodes, so changes to those nodes made via the DOM tree |
| * will be reflected in the NodeList and vice versa. |
| * <p> |
| * In this implementation, Nodes implement the NodeList interface and |
| * provide their own getChildNodes() support. Other DOMs may solve this |
| * differently. |
| */ |
| public NodeList getChildNodes() { |
| // JKESS: KNOWN ISSUE HERE |
| |
| if (needsSyncChildren()) { |
| synchronizeChildren(); |
| } |
| return this; |
| |
| } // getChildNodes():NodeList |
| |
| /** The first child of this Node, or null if none. */ |
| public Node getFirstChild() { |
| |
| if (needsSyncChildren()) { |
| synchronizeChildren(); |
| } |
| if (length == 0) |
| return null; |
| return children[0]; |
| |
| } // getFirstChild():Node |
| |
| /** The last child of this Node, or null if none. */ |
| public Node getLastChild() { |
| |
| if (needsSyncChildren()) { |
| synchronizeChildren(); |
| } |
| if (length == 0) |
| return null; |
| return children[length - 1]; |
| |
| } // getLastChild():Node |
| |
| final ChildNode lastChild() { |
| if (length == 0) |
| return null; |
| return children[length - 1]; |
| } |
| |
| /** |
| * Move one or more node(s) to our list of children. Note that this |
| * implicitly removes them from their previous parent. |
| * |
| * @param newChild The Node to be moved to our subtree. As a |
| * convenience feature, inserting a DocumentNode will instead insert |
| * all its children. |
| * |
| * @param refChild Current child which newChild should be placed |
| * immediately before. If refChild is null, the insertion occurs |
| * after all existing Nodes, like appendChild(). |
| * |
| * @returns newChild, in its new state (relocated, or emptied in the |
| * case of DocumentNode.) |
| * |
| * @throws DOMException(HIERARCHY_REQUEST_ERR) if newChild is of a |
| * type that shouldn't be a child of this node, or if newChild is an |
| * ancestor of this node. |
| * |
| * @throws DOMException(WRONG_DOCUMENT_ERR) if newChild has a |
| * different owner document than we do. |
| * |
| * @throws DOMException(NOT_FOUND_ERR) if refChild is not a child of |
| * this node. |
| * |
| * @throws DOMException(NO_MODIFICATION_ALLOWED_ERR) if this node is |
| * read-only. |
| */ |
| public Node insertBefore(Node newChild, Node refChild) |
| throws DOMException { |
| // Tail-call; optimizer should be able to do good things with. |
| return internalInsertBefore(newChild,refChild,MUTATION_ALL); |
| } // insertBefore(Node,Node):Node |
| |
| /** NON-DOM INTERNAL: Within DOM actions,we sometimes need to be able |
| * to control which mutation events are spawned. This version of the |
| * insertBefore operation allows us to do so. It is not intended |
| * for use by application programs. |
| */ |
| Node internalInsertBefore(Node newChild, Node refChild,int mutationMask) |
| throws DOMException { |
| |
| if (isReadOnly()) |
| throw new DOMExceptionImpl( |
| DOMException.NO_MODIFICATION_ALLOWED_ERR, |
| "DOM001 Modification not allowed"); |
| |
| boolean errorChecking = ownerDocument.errorChecking; |
| if (errorChecking && newChild.getOwnerDocument() != ownerDocument) { |
| throw new DOMExceptionImpl(DOMException.WRONG_DOCUMENT_ERR, |
| "DOM005 Wrong document"); |
| } |
| |
| if (needsSyncChildren()) { |
| synchronizeChildren(); |
| } |
| |
| if (errorChecking) { |
| // Prevent cycles in the tree |
| boolean treeSafe = true; |
| for (NodeImpl a = parentNode(); |
| treeSafe && a != null; |
| a = a.parentNode()) { |
| treeSafe = newChild != a; |
| } |
| if(!treeSafe) { |
| throw new DOMExceptionImpl(DOMException.HIERARCHY_REQUEST_ERR, |
| "DOM006 Hierarchy request error"); |
| } |
| |
| // refChild must in fact be a child of this node (or null) |
| if(refChild != null && refChild.getParentNode() != this) { |
| throw new DOMExceptionImpl(DOMException.NOT_FOUND_ERR, |
| "DOM008 Not found"); |
| } |
| } |
| |
| if (newChild.getNodeType() == Node.DOCUMENT_FRAGMENT_NODE) { |
| // SLOW BUT SAFE: We could insert the whole subtree without |
| // juggling so many next/previous pointers. (Wipe out the |
| // parent's child-list, patch the parent pointers, set the |
| // ends of the list.) But we know some subclasses have special- |
| // case behavior they add to insertBefore(), so we don't risk it. |
| // This approch also takes fewer bytecodes. |
| |
| // NOTE: If one of the children is not a legal child of this |
| // node, throw HIERARCHY_REQUEST_ERR before _any_ of the children |
| // have been transferred. (Alternative behaviors would be to |
| // reparent up to the first failure point or reparent all those |
| // which are acceptable to the target node, neither of which is |
| // as robust. PR-DOM-0818 isn't entirely clear on which it |
| // recommends????? |
| |
| // No need to check kids for right-document; if they weren't, |
| // they wouldn't be kids of that DocFrag. |
| for (int i = 0; i < length; i++) { // Prescan |
| if (errorChecking && |
| !ownerDocument.isKidOK(this, children[i])) { |
| throw new DOMExceptionImpl( |
| DOMException.HIERARCHY_REQUEST_ERR, |
| "DOM006 Hierarchy request error"); |
| } |
| } |
| |
| while (newChild.hasChildNodes()) { |
| insertBefore(newChild.getFirstChild(), refChild); |
| } |
| } |
| else if (errorChecking && |
| (!(newChild instanceof ChildNode) |
| || |
| !ownerDocument.isKidOK(this, newChild))) { |
| throw new DOMExceptionImpl(DOMException.HIERARCHY_REQUEST_ERR, |
| "DOM006 Hierarchy request error"); |
| } |
| else { |
| // Convert to internal type, to avoid repeated casting |
| ChildNode newInternal = (ChildNode)newChild; |
| |
| EnclosingAttr enclosingAttr=null; |
| if(MUTATIONEVENTS && ownerDocument.mutationEvents |
| && (mutationMask&MUTATION_AGGREGATE)!=0) |
| { |
| // MUTATION PREPROCESSING |
| // No direct pre-events, but if we're within the scope |
| // of an Attr and DOMAttrModified was requested, |
| // we need to preserve its previous value. |
| LCount lc=LCount.lookup(MutationEventImpl.DOM_ATTR_MODIFIED); |
| if(lc.captures+lc.bubbles+lc.defaults>0) |
| { |
| enclosingAttr=getEnclosingAttr(); |
| } |
| } |
| |
| Node oldparent = newInternal.parentNode(); |
| if (oldparent != null) { |
| oldparent.removeChild(newInternal); |
| } |
| |
| if (refChild == null) { // append |
| |
| // this is the only place this vector needs allocating, |
| // though it may also need to be grown in insertBefore. |
| // most elements have very few children |
| if (children == null) |
| children = new ChildNode [3]; |
| else if (children.length == length) { |
| ChildNode temp [] = new ChildNode [length * 2]; |
| System.arraycopy(children, 0, temp, 0, length); |
| children = temp; |
| } |
| |
| // set parent |
| newInternal.ownerNode = this; |
| newInternal.isOwned(true); |
| newInternal.parentIndex = length; |
| |
| children [length++] = newInternal; |
| |
| } else { |
| |
| // grow array if needed |
| if (children.length == length) { |
| ChildNode temp [] = new ChildNode [length * 2]; |
| System.arraycopy(children, 0, temp, 0, length); |
| children = temp; |
| } |
| |
| for (int i = 0; i < length; i++) { |
| if (children [i] != refChild) |
| continue; |
| |
| // set parent |
| newInternal.ownerNode = this; |
| newInternal.isOwned(true); |
| newInternal.parentIndex = i; |
| |
| System.arraycopy(children, i, children, i + 1, length - i); |
| children [i] = newInternal; |
| length++; |
| break; |
| } |
| } |
| |
| changed(); |
| |
| if(MUTATIONEVENTS && ownerDocument.mutationEvents) |
| { |
| // MUTATION POST-EVENTS: |
| // "Local" events (non-aggregated) |
| if( (mutationMask&MUTATION_LOCAL) != 0) |
| { |
| // New child is told it was inserted, and where |
| LCount lc = |
| LCount.lookup(MutationEventImpl.DOM_NODE_INSERTED); |
| if(lc.captures+lc.bubbles+lc.defaults>0) |
| { |
| MutationEvent me= new MutationEventImpl(); |
| //?????ownerDocument.createEvent("MutationEvents"); |
| me.initMutationEvent( |
| MutationEventImpl.DOM_NODE_INSERTED, |
| true,false,this,null,null,null); |
| newInternal.dispatchEvent(me); |
| } |
| |
| // If within the Document, tell the subtree it's been added |
| // to the Doc. |
| lc=LCount.lookup( |
| MutationEventImpl.DOM_NODE_INSERTED_INTO_DOCUMENT); |
| if(lc.captures+lc.bubbles+lc.defaults>0) |
| { |
| NodeImpl eventAncestor=this; |
| if(enclosingAttr!=null) |
| eventAncestor= |
| (NodeImpl)(enclosingAttr.node.getOwnerElement()); |
| if(eventAncestor!=null) // Might have been orphan Attr |
| { |
| NodeImpl p=eventAncestor; |
| while(p!=null) |
| { |
| eventAncestor=p; // Last non-null ancestor |
| // In this context, ancestry includes |
| // walking back from Attr to Element |
| if(p.getNodeType()==ATTRIBUTE_NODE) |
| p=(ElementImpl) |
| ((AttrImpl)p).getOwnerElement(); |
| else |
| p=p.parentNode(); |
| } |
| if(eventAncestor.getNodeType()==Node.DOCUMENT_NODE) |
| { |
| MutationEvent me= new MutationEventImpl(); |
| //??ownerDocument.createEvent("MutationEvents") |
| me.initMutationEvent(MutationEventImpl |
| .DOM_NODE_INSERTED_INTO_DOCUMENT, |
| false,false, |
| null,null,null,null); |
| dispatchEventToSubtree(newInternal,me); |
| } |
| } |
| } |
| } |
| |
| // Subroutine: Transmit DOMAttrModified and DOMSubtreeModified |
| // (Common to most kinds of mutation) |
| if( (mutationMask&MUTATION_AGGREGATE) != 0) |
| dispatchAggregateEvents(enclosingAttr); |
| } |
| } |
| return newChild; |
| |
| } // internalInsertBefore(Node,Node,int):Node |
| |
| /** |
| * Remove a child from this Node. The removed child's subtree |
| * remains intact so it may be re-inserted elsewhere. |
| * |
| * @return oldChild, in its new state (removed). |
| * |
| * @throws DOMException(NOT_FOUND_ERR) if oldChild is not a child of |
| * this node. |
| * |
| * @throws DOMException(NO_MODIFICATION_ALLOWED_ERR) if this node is |
| * read-only. |
| */ |
| public Node removeChild(Node oldChild) |
| throws DOMException { |
| // Tail-call, should be optimizable |
| return internalRemoveChild(oldChild,MUTATION_ALL); |
| } // removeChild(Node) :Node |
| |
| /** NON-DOM INTERNAL: Within DOM actions,we sometimes need to be able |
| * to control which mutation events are spawned. This version of the |
| * removeChild operation allows us to do so. It is not intended |
| * for use by application programs. |
| */ |
| Node internalRemoveChild(Node oldChild,int mutationMask) |
| throws DOMException { |
| |
| if (isReadOnly()) { |
| throw new DOMExceptionImpl( |
| DOMException.NO_MODIFICATION_ALLOWED_ERR, |
| "DOM001 Modification not allowed"); |
| } |
| |
| if (ownerDocument.errorChecking && |
| oldChild != null && oldChild.getParentNode() != this) { |
| throw new DOMExceptionImpl(DOMException.NOT_FOUND_ERR, |
| "DOM008 Not found"); |
| } |
| |
| // notify document |
| ownerDocument.removedChildNode(oldChild); |
| |
| ChildNode oldInternal = (ChildNode) oldChild; |
| |
| EnclosingAttr enclosingAttr=null; |
| if(MUTATIONEVENTS && ownerDocument.mutationEvents) |
| { |
| // MUTATION PREPROCESSING AND PRE-EVENTS: |
| // If we're within the scope of an Attr and DOMAttrModified |
| // was requested, we need to preserve its previous value for |
| // that event. |
| LCount lc=LCount.lookup(MutationEventImpl.DOM_ATTR_MODIFIED); |
| if(lc.captures+lc.bubbles+lc.defaults>0) |
| { |
| enclosingAttr=getEnclosingAttr(); |
| } |
| |
| if( (mutationMask&MUTATION_LOCAL) != 0) |
| { |
| // Child is told that it is about to be removed |
| lc=LCount.lookup(MutationEventImpl.DOM_NODE_REMOVED); |
| if(lc.captures+lc.bubbles+lc.defaults>0) |
| { |
| MutationEvent me= new MutationEventImpl(); |
| //?????ownerDocument.createEvent("MutationEvents"); |
| me.initMutationEvent(MutationEventImpl.DOM_NODE_REMOVED, |
| true,false,this,null,null,null); |
| oldInternal.dispatchEvent(me); |
| } |
| |
| // If within Document, child's subtree is informed that it's |
| // losing that status |
| lc=LCount.lookup( |
| MutationEventImpl.DOM_NODE_REMOVED_FROM_DOCUMENT); |
| if(lc.captures+lc.bubbles+lc.defaults>0) |
| { |
| NodeImpl eventAncestor=this; |
| if(enclosingAttr!=null) |
| eventAncestor= |
| (NodeImpl) enclosingAttr.node.getOwnerElement(); |
| if(eventAncestor!=null) // Might have been orphan Attr |
| { |
| for(NodeImpl p=eventAncestor.parentNode(); |
| p!=null; |
| p=p.parentNode()) |
| { |
| eventAncestor=p; // Last non-null ancestor |
| } |
| if(eventAncestor.getNodeType()==Node.DOCUMENT_NODE) |
| { |
| MutationEvent me= new MutationEventImpl(); |
| //?????ownerDocument.createEvent("MutationEvents"); |
| me.initMutationEvent(MutationEventImpl |
| .DOM_NODE_REMOVED_FROM_DOCUMENT, |
| false,false, |
| null,null,null,null); |
| dispatchEventToSubtree(oldInternal,me); |
| } |
| } |
| } |
| } |
| } // End mutation preprocessing |
| |
| // Patch tree past oldChild |
| for (int i = 0; i < length; i++) { |
| if (children [i] != oldInternal) |
| continue; |
| if ((i + 1) != length) { |
| System.arraycopy (children, i + 1, children, i, |
| (length - 1) - i); |
| } |
| length--; |
| children[length] = null; |
| |
| break; |
| } |
| |
| // Remove oldInternal's references to tree |
| oldInternal.ownerNode = ownerDocument; |
| oldInternal.isOwned(false); |
| oldInternal.parentIndex = -1; |
| |
| changed(); |
| |
| if(MUTATIONEVENTS && ownerDocument.mutationEvents) |
| { |
| // MUTATION POST-EVENTS: |
| // Subroutine: Transmit DOMAttrModified and DOMSubtreeModified, |
| // if required. (Common to most kinds of mutation) |
| if( (mutationMask&MUTATION_AGGREGATE) != 0) |
| dispatchAggregateEvents(enclosingAttr); |
| } // End mutation postprocessing |
| |
| return oldInternal; |
| |
| } // internalRemoveChild(Node,int):Node |
| |
| /** |
| * Make newChild occupy the location that oldChild used to |
| * have. Note that newChild will first be removed from its previous |
| * parent, if any. Equivalent to inserting newChild before oldChild, |
| * then removing oldChild. |
| * |
| * @returns oldChild, in its new state (removed). |
| * |
| * @throws DOMException(HIERARCHY_REQUEST_ERR) if newChild is of a |
| * type that shouldn't be a child of this node, or if newChild is |
| * one of our ancestors. |
| * |
| * @throws DOMException(WRONG_DOCUMENT_ERR) if newChild has a |
| * different owner document than we do. |
| * |
| * @throws DOMException(NOT_FOUND_ERR) if oldChild is not a child of |
| * this node. |
| * |
| * @throws DOMException(NO_MODIFICATION_ALLOWED_ERR) if this node is |
| * read-only. |
| */ |
| public Node replaceChild(Node newChild, Node oldChild) |
| throws DOMException { |
| // If Mutation Events are being generated, this operation might |
| // throw aggregate events twice when modifying an Attr -- once |
| // on insertion and once on removal. DOM Level 2 does not specify |
| // this as either desirable or undesirable, but hints that |
| // aggregations should be issued only once per user request. |
| |
| EnclosingAttr enclosingAttr=null; |
| if(MUTATIONEVENTS && ownerDocument.mutationEvents) |
| { |
| // MUTATION PREPROCESSING AND PRE-EVENTS: |
| // If we're within the scope of an Attr and DOMAttrModified |
| // was requested, we need to preserve its previous value for |
| // that event. |
| LCount lc=LCount.lookup(MutationEventImpl.DOM_ATTR_MODIFIED); |
| if(lc.captures+lc.bubbles+lc.defaults>0) |
| { |
| enclosingAttr=getEnclosingAttr(); |
| } |
| } // End mutation preprocessing |
| |
| internalInsertBefore(newChild, oldChild,MUTATION_LOCAL); |
| internalRemoveChild(oldChild,MUTATION_LOCAL); |
| |
| if(MUTATIONEVENTS && ownerDocument.mutationEvents) |
| { |
| dispatchAggregateEvents(enclosingAttr); |
| } |
| |
| return oldChild; |
| } |
| |
| // |
| // NodeList methods |
| // |
| |
| /** |
| * NodeList method: Count the immediate children of this node |
| * @return int |
| */ |
| public int getLength() { |
| return length; |
| } // getLength():int |
| |
| /** |
| * NodeList method: Return the Nth immediate child of this node, or |
| * null if the index is out of bounds. |
| * @return org.w3c.dom.Node |
| * @param Index int |
| */ |
| public Node item(int index) { |
| if (length == 0 || index >= length) |
| return null; |
| try { |
| return children[index]; |
| } catch (ArrayIndexOutOfBoundsException e) { |
| return null; |
| } |
| } // item(int):Node |
| |
| // |
| // DOM2: methods, getters, setters |
| // |
| |
| /** |
| * Override default behavior to call normalize() on this Node's |
| * children. It is up to implementors or Node to override normalize() |
| * to take action. |
| */ |
| public void normalize() { |
| |
| Node kid; |
| for (int i = 0; i < length; i++) { |
| children[i].normalize(); |
| } |
| } |
| |
| // |
| // Public methods |
| // |
| |
| /** |
| * Override default behavior so that if deep is true, children are also |
| * toggled. |
| * @see Node |
| * <P> |
| * Note: this will not change the state of an EntityReference or its |
| * children, which are always read-only. |
| */ |
| public void setReadOnly(boolean readOnly, boolean deep) { |
| |
| super.setReadOnly(readOnly, deep); |
| |
| if (deep) { |
| |
| if (needsSyncChildren()) { |
| synchronizeChildren(); |
| } |
| |
| // Recursively set kids |
| for (int i = 0; i < length; i++) { |
| if(!(children[i] instanceof EntityReference)) { |
| children[i].setReadOnly(readOnly,true); |
| } |
| } |
| } |
| } // setReadOnly(boolean,boolean) |
| |
| // |
| // Protected methods |
| // |
| |
| /** |
| * Override this method in subclass to hook in efficient |
| * internal data structure. |
| */ |
| protected void synchronizeChildren() { |
| // By default just change the flag to avoid calling this method again |
| needsSyncChildren(false); |
| } |
| |
| /** |
| * Synchronizes the node's children with the internal structure. |
| * Fluffing the children at once solves a lot of work to keep |
| * the two structures in sync. The problem gets worse when |
| * editing the tree -- this makes it a lot easier. |
| * Even though this is only used in deferred classes this method is |
| * put here so that it can be shared by all deferred classes. |
| */ |
| protected final void synchronizeChildren(int nodeIndex) { |
| |
| // we don't want to generate any event for this so turn them off |
| boolean orig = ownerDocument.mutationEvents; |
| ownerDocument.mutationEvents = false; |
| |
| // no need to sync in the future |
| needsSyncChildren(false); |
| |
| // create children and link them as siblings |
| DeferredDocumentImpl ownerDocument = |
| (DeferredDocumentImpl)this.ownerDocument; |
| |
| // first count them |
| for (int index = ownerDocument.getLastChild(nodeIndex, false); |
| index != -1; |
| index = ownerDocument.getPrevSibling(index, false)) { |
| length++; |
| } |
| |
| // then fluff them up |
| if (length > 0) { |
| children = new ChildNode [length]; |
| |
| int count = length; |
| for (int index = ownerDocument.getLastChild(nodeIndex); |
| index != -1; |
| index = ownerDocument.getPrevSibling(index)) { |
| |
| ChildNode node = (ChildNode)ownerDocument.getNodeObject(index); |
| node.ownerNode = this; |
| node.isOwned(true); |
| node.parentIndex = --count; |
| children[count] = node; |
| } |
| } |
| |
| // set mutation events flag back to its original value |
| ownerDocument.mutationEvents = orig; |
| |
| } // synchronizeChildren() |
| |
| // |
| // Serialization methods |
| // |
| |
| /** Serialize object. */ |
| private void writeObject(ObjectOutputStream out) throws IOException { |
| |
| // synchronize chilren |
| if (needsSyncChildren()) { |
| synchronizeChildren(); |
| } |
| // write object |
| out.defaultWriteObject(); |
| |
| } // writeObject(ObjectOutputStream) |
| |
| /** Deserialize object. */ |
| private void readObject(ObjectInputStream ois) |
| throws ClassNotFoundException, IOException { |
| |
| // perform default deseralization |
| ois.defaultReadObject(); |
| |
| // hardset synchildren - so we don't try to sync- it does not make any sense |
| // to try to synchildren when we just desealize object. |
| |
| needsSyncChildren(false); |
| |
| } // readObject(ObjectInputStream) |
| |
| } // class ChildAndParentNode |
