| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| /* |
| * $Id: AttrImpl.cpp 568078 2007-08-21 11:43:25Z amassari $ |
| * |
| * <p><b>WARNING</b>: Some of the code here is partially duplicated in |
| * ParentNode, be careful to keep these two classes in sync! |
| */ |
| |
| #include "AttrImpl.hpp" |
| #include "DOM_DOMException.hpp" |
| #include "DocumentImpl.hpp" |
| #include "TextImpl.hpp" |
| #include "ElementImpl.hpp" |
| #include "DStringPool.hpp" |
| #include "NodeIDMap.hpp" |
| #include "RangeImpl.hpp" |
| |
| XERCES_CPP_NAMESPACE_BEGIN |
| |
| |
| /* |
| * The handling of the value field being either the first child node (a |
| * ChildNode*) or directly the value (a DOMString) is rather tricky. In the |
| * DOMString case we need to get the field in the right type so that the |
| * compiler is happy and the appropriate operator gets called. This is |
| * essential for the reference counts of the DOMStrings involved to be updated |
| * as due. |
| * This is consistently achieved by taking the address of the value field and |
| * changing it into a DOMString*, and then dereferencing it to get a DOMString. |
| * The typical piece of code is: |
| * DOMString *x = (DomString *)&value; |
| * ... use of *x which is the DOMString ... |
| * This was amended by neilg after memory management was |
| * introduced. Now a union exists which is either a |
| * DOMString * or a ChildNode *. This will be less efficient |
| * (one more dereference per access) but actually works on all the |
| * compilers we support. |
| */ |
| |
| AttrImpl::AttrImpl(DocumentImpl *ownerDoc, const DOMString &aName) |
| : NodeImpl (ownerDoc) |
| { |
| name = aName.clone(); |
| isSpecified(true); |
| hasStringValue(true); |
| value.child = null; |
| }; |
| |
| AttrImpl::AttrImpl(const AttrImpl &other, bool /*deep*/) |
| : NodeImpl(other) |
| { |
| name = other.name.clone(); |
| |
| isSpecified(other.isSpecified()); |
| |
| /* We must initialize the void* value to null in *all* cases. Failing to do |
| * so would cause, in case of assignment to a DOMString later, its content |
| * to be derefenced as a DOMString, which would lead the ref count code to |
| * be called on something that is not actually a DOMString... Really bad |
| * things would then happen!!! |
| */ |
| value.child = null; |
| hasStringValue(other.hasStringValue()); |
| |
| if (other.isIdAttr()) |
| { |
| isIdAttr(true); |
| this->getOwnerDocument()->getNodeIDMap()->add(this); |
| } |
| |
| // take care of case where there are kids |
| if (!hasStringValue()) { |
| cloneChildren(other); |
| } |
| else { |
| if(other.value.str == null) |
| { |
| if(value.str != null) |
| { |
| *(value.str) = null; |
| delete value.str; |
| value.str = null; |
| } |
| } |
| else |
| { |
| // get the address of the value field of this as a DOMString* |
| DOMString *x = (value.str == null |
| ?(value.str = new (getOwnerDocument()->getMemoryManager()) DOMString()) |
| :value.str |
| ); |
| // and the address of the value field of other as a DOMString* |
| DOMString *y = other.value.str; |
| // We can now safely do the cloning and assignement, both operands |
| // being a DOMString their ref counts will be updated appropriately |
| *x = y->clone(); |
| } |
| } |
| }; |
| |
| |
| AttrImpl::~AttrImpl() { |
| if (hasStringValue()) { |
| // if value is a DOMString we must make sure its ref count is updated. |
| // this is achieved by changing the address of the value field into a |
| // DOMString* and setting the value field to null |
| if(value.str != null) |
| { |
| *(value.str) = null; |
| delete value.str; |
| value.str = null; |
| } |
| } |
| } |
| |
| |
| // create a real Text node as child if we don't have one yet |
| void AttrImpl::makeChildNode() { |
| if (hasStringValue()) { |
| if (value.child != null) { |
| // change the address of the value field into a DOMString* |
| DOMString *x = (value.str == null |
| ?(value.str = new (getOwnerDocument()->getMemoryManager()) DOMString()) |
| :value.str |
| ); |
| // create a Text node passing the DOMString it points to |
| TextImpl *text = |
| (TextImpl *) getOwnerDocument()->createTextNode(*x); |
| // get the DOMString ref count to be updated by setting the value |
| // field to null |
| *x = null; |
| delete x; |
| // finally reassign the value to the node address |
| value.child = text; |
| text->isFirstChild(true); |
| text->previousSibling = text; |
| text->ownerNode = this; |
| text->isOwned(true); |
| } |
| hasStringValue(false); |
| } |
| } |
| |
| NodeImpl * AttrImpl::cloneNode(bool deep) |
| { |
| return new (getOwnerDocument()->getMemoryManager()) AttrImpl(*this, deep); |
| }; |
| |
| |
| DOMString AttrImpl::getNodeName() { |
| return name; |
| }; |
| |
| |
| short AttrImpl::getNodeType() { |
| return DOM_Node::ATTRIBUTE_NODE; |
| }; |
| |
| |
| DOMString AttrImpl::getName() |
| { |
| return name; |
| }; |
| |
| |
| DOMString AttrImpl::getNodeValue() |
| { |
| return getValue(); |
| }; |
| |
| |
| bool AttrImpl::getSpecified() |
| { |
| return isSpecified(); |
| }; |
| |
| |
| |
| |
| DOMString AttrImpl::getValue() |
| { |
| if (value.child == null) { |
| return 0; // return ""; |
| } |
| if (hasStringValue()) { |
| // change value into a DOMString* |
| DOMString *x = (value.str == null |
| ?(value.str = new (getOwnerDocument()->getMemoryManager()) DOMString()) |
| :value.str |
| ); |
| // return the DOMString it points to |
| return *x; |
| } |
| ChildNode *firstChild = value.child; |
| ChildNode *node = firstChild->nextSibling; |
| if (node == null) { |
| return firstChild->getNodeValue().clone(); |
| } |
| int length = 0; |
| for (node = firstChild; node != null; node = node->nextSibling) |
| length += node->getNodeValue().length(); |
| |
| DOMString retString; |
| retString.reserve(length); |
| for (node = firstChild; node != null; node = node->nextSibling) |
| { |
| retString.appendData(node->getNodeValue()); |
| }; |
| |
| return retString; |
| }; |
| |
| |
| bool AttrImpl::isAttrImpl() |
| { |
| return true; |
| }; |
| |
| |
| void AttrImpl::setNodeValue(const DOMString &val) |
| { |
| setValue(val); |
| }; |
| |
| |
| |
| void AttrImpl::setSpecified(bool arg) |
| { |
| isSpecified(arg); |
| }; |
| |
| |
| |
| void AttrImpl::setValue(const DOMString &newvalue) |
| { |
| if (isReadOnly()) |
| { |
| throw DOM_DOMException |
| ( |
| DOM_DOMException::NO_MODIFICATION_ALLOWED_ERR, null |
| ); |
| } |
| |
| // If this attribute was of type ID and in the map, take it out, |
| // then put it back in with the new name. For now, we don't worry |
| // about what happens if the new name conflicts |
| // |
| if (isIdAttr()) |
| this->getOwnerDocument()->getNodeIDMap()->remove(this); |
| |
| if (!hasStringValue() && value.str != null) { |
| NodeImpl *kid; |
| while ((kid = value.child) != null) { // Remove existing kids |
| removeChild(kid); |
| if (kid->nodeRefCount == 0) |
| NodeImpl::deleteIf(kid); |
| } |
| } |
| |
| // directly store the string as the value by changing the value field |
| // into a DOMString |
| DOMString *x = (value.str == null |
| ?(value.str = new (getOwnerDocument()->getMemoryManager()) DOMString()) |
| :value.str |
| ); |
| if (newvalue != null) { |
| *x = newvalue.clone(); |
| } |
| else { |
| *x = null; |
| delete x; |
| value.str = null; |
| } |
| hasStringValue(true); |
| isSpecified(true); |
| changed(); |
| |
| if (isIdAttr()) |
| this->getOwnerDocument()->getNodeIDMap()->add(this); |
| |
| }; |
| |
| |
| |
| DOMString AttrImpl::toString() |
| { |
| DOMString retString; |
| |
| retString.appendData(name); |
| retString.appendData(DOMString("=\"")); |
| retString.appendData(getValue()); |
| retString.appendData(DOMString("\"")); |
| return retString; |
| } |
| |
| |
| //Introduced in DOM Level 2 |
| |
| ElementImpl *AttrImpl::getOwnerElement() |
| { |
| // if we have an owner, ownerNode is our ownerElement, otherwise it's |
| // our ownerDocument and we don't have an ownerElement |
| return (ElementImpl *) (isOwned() ? ownerNode : null); |
| } |
| |
| |
| //internal use by parser only |
| void AttrImpl::setOwnerElement(ElementImpl *ownerElem) |
| { |
| ownerNode = ownerElem; |
| isOwned(false); |
| } |
| |
| |
| // ParentNode stuff |
| |
| void AttrImpl::cloneChildren(const NodeImpl &other) { |
| // for (NodeImpl *mykid = other.getFirstChild(); |
| for (NodeImpl *mykid = ((NodeImpl&)other).getFirstChild(); |
| mykid != null; |
| mykid = mykid->getNextSibling()) { |
| this->appendChild(mykid->cloneNode(true)); |
| } |
| } |
| |
| NodeListImpl *AttrImpl::getChildNodes() { |
| return this; |
| } |
| |
| |
| NodeImpl * AttrImpl::getFirstChild() { |
| makeChildNode(); |
| return value.child; |
| } |
| |
| |
| NodeImpl * AttrImpl::getLastChild() { |
| return lastChild(); |
| } |
| |
| ChildNode * AttrImpl::lastChild() { |
| // last child is stored as the previous sibling of first child |
| makeChildNode(); |
| return value.child != null ? (value.child)->previousSibling : null; |
| } |
| |
| void AttrImpl::lastChild(ChildNode *node) { |
| // store lastChild as previous sibling of first child |
| if (value.child != null) { |
| (value.child)->previousSibling = node; |
| } |
| } |
| |
| unsigned int AttrImpl::getLength() { |
| if (hasStringValue()) { |
| return 1; |
| } |
| ChildNode *node = value.child; |
| int length = 0; |
| while (node != null) { |
| length++; |
| node = node->nextSibling; |
| } |
| return length; |
| } |
| |
| bool AttrImpl::hasChildNodes() |
| { |
| return value.child != null; |
| }; |
| |
| |
| |
| NodeImpl *AttrImpl::insertBefore(NodeImpl *newChild, NodeImpl *refChild) { |
| |
| DocumentImpl *ownerDocument = getOwnerDocument(); |
| bool errorChecking = ownerDocument->getErrorChecking(); |
| |
| if (newChild->isDocumentFragmentImpl()) { |
| // 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. |
| if (errorChecking) { |
| for (NodeImpl *kid = newChild->getFirstChild(); // Prescan |
| kid != null; kid = kid->getNextSibling()) { |
| |
| if (!DocumentImpl::isKidOK(this, kid)) { |
| throw DOM_DOMException( |
| DOM_DOMException::HIERARCHY_REQUEST_ERR, |
| null); |
| } |
| } |
| } |
| |
| while (newChild->hasChildNodes()) { // Move |
| insertBefore(newChild->getFirstChild(), refChild); |
| } |
| return newChild; |
| } |
| |
| // it's a no-op if refChild is the same as newChild |
| if (refChild == newChild) { |
| return newChild; |
| } |
| |
| if (errorChecking) { |
| if (isReadOnly()) { |
| throw DOM_DOMException( |
| DOM_DOMException::NO_MODIFICATION_ALLOWED_ERR, |
| null); |
| } |
| if (newChild->getOwnerDocument() != ownerDocument) { |
| throw DOM_DOMException(DOM_DOMException::WRONG_DOCUMENT_ERR, null); |
| } |
| if (!DocumentImpl::isKidOK(this, newChild)) { |
| throw DOM_DOMException(DOM_DOMException::HIERARCHY_REQUEST_ERR, |
| null); |
| } |
| // refChild must be a child of this node (or null) |
| if (refChild != null && refChild->getParentNode() != this) { |
| throw DOM_DOMException(DOM_DOMException::NOT_FOUND_ERR, null); |
| } |
| |
| // Prevent cycles in the tree |
| // newChild cannot be ancestor of this Node, |
| // and actually cannot be this |
| bool treeSafe = true; |
| for (NodeImpl *a = this; treeSafe && a != null; a = a->getParentNode()) |
| { |
| treeSafe = (newChild != a); |
| } |
| if (!treeSafe) { |
| throw DOM_DOMException(DOM_DOMException::HIERARCHY_REQUEST_ERR, |
| null); |
| } |
| } |
| |
| makeChildNode(); // make sure we have a node and not a string |
| |
| // Convert to internal type, to avoid repeated casting |
| ChildNode * newInternal = (ChildNode *)newChild; |
| |
| NodeImpl *oldparent = newInternal->getParentNode(); |
| if (oldparent != null) { |
| oldparent->removeChild(newInternal); |
| } |
| |
| // Convert to internal type, to avoid repeated casting |
| ChildNode *refInternal = (ChildNode *)refChild; |
| |
| // Attach up |
| newInternal->ownerNode = this; |
| newInternal->isOwned(true); |
| |
| // Attach before and after |
| // Note: firstChild.previousSibling == lastChild!! |
| ChildNode *firstChild = value.child; |
| if (firstChild == null) { |
| // this our first and only child |
| value.child = newInternal; // firstChild = newInternal |
| newInternal->isFirstChild(true); |
| newInternal->previousSibling = newInternal; |
| } |
| else { |
| if (refInternal == null) { |
| // this is an append |
| ChildNode *lastChild = firstChild->previousSibling; |
| lastChild->nextSibling = newInternal; |
| newInternal->previousSibling = lastChild; |
| firstChild->previousSibling = newInternal; |
| } |
| else { |
| // this is an insert |
| if (refChild == firstChild) { |
| // at the head of the list |
| firstChild->isFirstChild(false); |
| newInternal->nextSibling = firstChild; |
| newInternal->previousSibling = firstChild->previousSibling; |
| firstChild->previousSibling = newInternal; |
| value.child = newInternal; // firstChild = newInternal; |
| newInternal->isFirstChild(true); |
| } |
| else { |
| // somewhere in the middle |
| ChildNode *prev = refInternal->previousSibling; |
| newInternal->nextSibling = refInternal; |
| prev->nextSibling = newInternal; |
| refInternal->previousSibling = newInternal; |
| newInternal->previousSibling = prev; |
| } |
| } |
| } |
| |
| changed(); |
| |
| if (this->getOwnerDocument() != null) { |
| typedef RefVectorOf<RangeImpl> RangeImpls; |
| RangeImpls* ranges = this->getOwnerDocument()->getRanges(); |
| if ( ranges != null) { |
| unsigned int sz = ranges->size(); |
| for (unsigned int i =0; i<sz; i++) { |
| ranges->elementAt(i)->updateRangeForInsertedNode(newInternal); |
| } |
| } |
| } |
| |
| return newInternal; |
| } |
| |
| |
| NodeImpl *AttrImpl::item(unsigned int index) { |
| |
| if (hasStringValue()) { |
| if (index != 0 || value.child == null) { |
| return null; |
| } |
| else { |
| makeChildNode(); |
| return (NodeImpl *) (value.child); |
| } |
| } |
| ChildNode *nodeListNode = value.child; |
| for (unsigned int nodeListIndex = 0; |
| nodeListIndex < index && nodeListNode != null; |
| nodeListIndex++) { |
| nodeListNode = nodeListNode->nextSibling; |
| } |
| return nodeListNode; |
| } |
| |
| |
| NodeImpl *AttrImpl::removeChild(NodeImpl *oldChild) { |
| |
| DocumentImpl *ownerDocument = getOwnerDocument(); |
| if (ownerDocument->getErrorChecking()) { |
| if (isReadOnly()) { |
| throw DOM_DOMException( |
| DOM_DOMException::NO_MODIFICATION_ALLOWED_ERR, |
| null); |
| } |
| if (oldChild == null || oldChild->getParentNode() != this) { |
| throw DOM_DOMException(DOM_DOMException::NOT_FOUND_ERR, null); |
| } |
| } |
| // fix other ranges for change before deleting the node |
| if (getOwnerDocument() != null) { |
| typedef RefVectorOf<RangeImpl> RangeImpls; |
| RangeImpls* ranges = this->getOwnerDocument()->getRanges(); |
| if (ranges != null) { |
| unsigned int sz = ranges->size(); |
| if (sz != 0) { |
| for (unsigned int i =0; i<sz; i++) { |
| if (ranges->elementAt(i) != null) |
| ranges->elementAt(i)->updateRangeForDeletedNode(oldChild); |
| } |
| } |
| } |
| } |
| |
| ChildNode * oldInternal = (ChildNode *) oldChild; |
| |
| // Patch linked list around oldChild |
| // Note: lastChild == firstChild->previousSibling |
| if (oldInternal == value.child) { |
| // removing first child |
| oldInternal->isFirstChild(false); |
| value.child = oldInternal->nextSibling; // firstChild = oldInternal->nextSibling |
| ChildNode *firstChild = value.child; |
| if (firstChild != null) { |
| firstChild->isFirstChild(true); |
| firstChild->previousSibling = oldInternal->previousSibling; |
| } |
| } else { |
| ChildNode *prev = oldInternal->previousSibling; |
| ChildNode *next = oldInternal->nextSibling; |
| prev->nextSibling = next; |
| if (next == null) { |
| // removing last child |
| ChildNode *firstChild = value.child; |
| firstChild->previousSibling = prev; |
| } else { |
| // removing some other child in the middle |
| next->previousSibling = prev; |
| } |
| } |
| |
| // Remove oldInternal's references to tree |
| oldInternal->ownerNode = getOwnerDocument(); |
| oldInternal->isOwned(false); |
| oldInternal->nextSibling = null; |
| oldInternal->previousSibling = null; |
| |
| changed(); |
| |
| return oldInternal; |
| }; |
| |
| |
| NodeImpl *AttrImpl::replaceChild(NodeImpl *newChild, NodeImpl *oldChild) { |
| insertBefore(newChild, oldChild); |
| if (newChild != oldChild) { |
| removeChild(oldChild); |
| } |
| // changed() already done. |
| return oldChild; |
| } |
| |
| |
| void AttrImpl::setReadOnly(bool readOnl, bool deep) { |
| NodeImpl::setReadOnly(readOnl, deep); |
| |
| if (deep) { |
| if (hasStringValue()) { |
| return; |
| } |
| // Recursively set kids |
| for (ChildNode *mykid = value.child; |
| mykid != null; |
| mykid = mykid->nextSibling) |
| if(! (mykid->isEntityReference())) |
| mykid->setReadOnly(readOnl,true); |
| } |
| } |
| |
| |
| //Introduced in DOM Level 2 |
| |
| void AttrImpl::normalize() |
| { |
| if (hasStringValue()) { |
| return; |
| } |
| ChildNode *kid, *next; |
| for (kid = value.child; kid != null; kid = next) |
| { |
| next = kid->nextSibling; |
| |
| // If kid and next are both Text nodes (but _not_ CDATASection, |
| // which is a subclass of Text), they can be merged. |
| if (next != null && |
| kid->isTextImpl() && !(kid->isCDATASectionImpl()) && |
| next->isTextImpl() && !(next->isCDATASectionImpl()) ) |
| { |
| ((TextImpl *) kid)->appendData(((TextImpl *) next)->getData()); |
| removeChild(next); |
| if (next->nodeRefCount == 0) |
| deleteIf(next); |
| next = kid; // Don't advance; there might be another. |
| } |
| |
| // Otherwise it might be an Element, which is handled recursively |
| else |
| if (kid->isElementImpl()) |
| kid->normalize(); |
| }; |
| |
| // changed() will have occurred when the removeChild() was done, |
| // so does not have to be reissued. |
| }; |
| |
| XERCES_CPP_NAMESPACE_END |
| |