445 lines
12 KiB
C++
445 lines
12 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS"
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* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
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* the License for the specific language governing rights and limitations
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* under the License.
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*
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* The Original Code is Mozilla Communicator client code.
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*
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* The Initial Developer of the Original Code is Netscape Communications
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* Corporation. Portions created by Netscape are Copyright (C) 1998
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* Netscape Communications Corporation. All Rights Reserved.
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*/
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#include "nsDOMAttributeMap.h"
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#include "nsDOMAttribute.h"
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#include "nsGenericElement.h"
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#include "nsIContent.h"
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#include "nsIDOMScriptObjectFactory.h"
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#include "nsINameSpaceManager.h"
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static NS_DEFINE_IID(kIDOMNamedNodeMapIID, NS_IDOMNAMEDNODEMAP_IID);
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static NS_DEFINE_IID(kIDOMAttrIID, NS_IDOMATTR_IID);
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static NS_DEFINE_IID(kIDOMAttributePrivateIID, NS_IDOMATTRIBUTEPRIVATE_IID);
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//----------------------------------------------------------------------
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nsDOMAttributeMap::nsDOMAttributeMap(nsIContent* aContent)
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: mContent(aContent)
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{
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NS_INIT_REFCNT();
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mScriptObject = nsnull;
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mAttributes = nsnull;
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// We don't add a reference to our content. If it goes away,
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// we'll be told to drop our reference
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}
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PR_CALLBACK PRIntn
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RemoveAttributes(PLHashEntry* he, PRIntn i, void* arg)
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{
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nsIDOMAttr* attr = (nsIDOMAttr*)he->value;
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char* str = (char*)he->key;
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if (nsnull != attr) {
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nsIDOMAttributePrivate* attrPrivate;
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attr->QueryInterface(kIDOMAttributePrivateIID, (void**)&attrPrivate);
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attrPrivate->DropReference();
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NS_RELEASE(attrPrivate);
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NS_RELEASE(attr);
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}
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delete [] str;
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return HT_ENUMERATE_REMOVE;
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}
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PR_CALLBACK PRIntn
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DropReferencesInAttributes(PLHashEntry* he, PRIntn i, void* arg)
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{
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nsDOMAttribute* attr = (nsDOMAttribute*)he->value;
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if (nsnull != attr) {
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nsIDOMAttributePrivate* attrPrivate;
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attr->QueryInterface(kIDOMAttributePrivateIID, (void**)&attrPrivate);
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attrPrivate->DropReference();
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NS_RELEASE(attrPrivate);
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}
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return HT_ENUMERATE_NEXT;
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}
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nsDOMAttributeMap::~nsDOMAttributeMap()
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{
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if (nsnull != mAttributes) {
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PL_HashTableEnumerateEntries(mAttributes, RemoveAttributes, nsnull);
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}
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}
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void
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nsDOMAttributeMap::DropReference()
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{
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mContent = nsnull;
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if (nsnull != mAttributes) {
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PL_HashTableEnumerateEntries(mAttributes, DropReferencesInAttributes, nsnull);
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}
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}
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nsresult
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nsDOMAttributeMap::QueryInterface(REFNSIID aIID, void** aInstancePtr)
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{
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if (NULL == aInstancePtr) {
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return NS_ERROR_NULL_POINTER;
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}
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if (aIID.Equals(kIDOMNamedNodeMapIID)) {
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nsIDOMNamedNodeMap* tmp = this;
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*aInstancePtr = (void*)tmp;
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NS_ADDREF_THIS();
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return NS_OK;
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}
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if (aIID.Equals(kIScriptObjectOwnerIID)) {
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nsIScriptObjectOwner* tmp = this;
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*aInstancePtr = (void*)tmp;
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NS_ADDREF_THIS();
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return NS_OK;
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}
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if (aIID.Equals(kISupportsIID)) {
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nsIDOMNamedNodeMap* tmp1 = this;
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nsISupports* tmp2 = tmp1;
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*aInstancePtr = (void*)tmp2;
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NS_ADDREF_THIS();
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return NS_OK;
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}
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return NS_NOINTERFACE;
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}
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NS_IMPL_ADDREF(nsDOMAttributeMap)
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NS_IMPL_RELEASE(nsDOMAttributeMap)
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nsresult
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nsDOMAttributeMap::GetScriptObject(nsIScriptContext *aContext,
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void** aScriptObject)
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{
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nsresult res = NS_OK;
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if (nsnull == mScriptObject) {
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nsIDOMScriptObjectFactory *factory;
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res = nsGenericElement::GetScriptObjectFactory(&factory);
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if (NS_OK != res) {
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return res;
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}
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res = factory->NewScriptNamedNodeMap(aContext,
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(nsISupports *)(nsIDOMNamedNodeMap *)this,
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(nsISupports *)mContent,
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(void**)&mScriptObject);
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NS_RELEASE(factory);
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}
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*aScriptObject = mScriptObject;
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return res;
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}
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nsresult
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nsDOMAttributeMap::SetScriptObject(void *aScriptObject)
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{
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mScriptObject = aScriptObject;
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return NS_OK;
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}
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PLHashTable*
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nsDOMAttributeMap::GetAttributeTable()
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{
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if ((nsnull == mAttributes) && (nsnull != mContent)) {
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PRInt32 count;
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mContent->GetAttributeCount(count);
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mAttributes = PL_NewHashTable(count, PL_HashString, PL_CompareStrings,
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PL_CompareValues, nsnull, nsnull);
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}
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return mAttributes;
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}
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nsresult
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nsDOMAttributeMap::GetNamedItemCommon(const nsString& aAttrName,
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PRInt32 aNameSpaceID,
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nsIAtom* aNameAtom,
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nsIDOMNode** aAttribute)
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{
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nsIDOMAttr* attribute;
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char buf[128];
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nsresult result = NS_OK;
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PLHashTable* attrHash = GetAttributeTable();
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aAttrName.ToCString(buf, sizeof(buf));
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if (nsnull != attrHash) {
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attribute = (nsIDOMAttr*)PL_HashTableLookup(attrHash, buf);
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if (nsnull == attribute) {
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nsresult attrResult;
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nsAutoString value;
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attrResult = mContent->GetAttribute(aNameSpaceID, aNameAtom, value);
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if (NS_CONTENT_ATTR_NOT_THERE != attrResult) {
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nsDOMAttribute* domAttribute;
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domAttribute = new nsDOMAttribute(mContent, aAttrName, value);
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if (nsnull == domAttribute) {
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result = NS_ERROR_OUT_OF_MEMORY;
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}
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else {
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result = domAttribute->QueryInterface(kIDOMAttrIID,
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(void **)&attribute);
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char* hashKey = aAttrName.ToNewCString();
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PL_HashTableAdd(attrHash, hashKey, attribute);
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}
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}
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}
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}
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if (nsnull != attribute) {
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result = attribute->QueryInterface(kIDOMNodeIID, (void**)aAttribute);
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}
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else {
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*aAttribute = nsnull;
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}
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return result;
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}
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void
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nsDOMAttributeMap::GetNormalizedName(PRInt32 aNameSpaceID,
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nsIAtom* aNameAtom,
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nsString& aAttrName)
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{
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nsIAtom* prefix;
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aAttrName.Truncate();
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mContent->GetNameSpacePrefix(aNameSpaceID, prefix);
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if (nsnull != prefix) {
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prefix->ToString(aAttrName);
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aAttrName.Append(":");
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NS_RELEASE(prefix);
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}
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if (nsnull != aNameAtom) {
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nsAutoString tmp;
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aNameAtom->ToString(tmp);
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aAttrName.Append(tmp);
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}
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}
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nsresult
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nsDOMAttributeMap::GetNamedItem(const nsString &aAttrName,
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nsIDOMNode** aAttribute)
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{
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nsresult result = NS_OK;
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if (nsnull != mContent) {
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nsIAtom* nameAtom;
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PRInt32 nameSpaceID;
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nsAutoString normalizedName;
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mContent->ParseAttributeString(aAttrName, nameAtom, nameSpaceID);
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GetNormalizedName(nameSpaceID, nameAtom, normalizedName);
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result = GetNamedItemCommon(normalizedName,
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nameSpaceID,
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nameAtom,
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aAttribute);
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NS_IF_RELEASE(nameAtom);
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}
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else {
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*aAttribute = nsnull;
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}
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return result;
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}
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nsresult
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nsDOMAttributeMap::SetNamedItem(nsIDOMNode *aNode, nsIDOMNode **aReturn)
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{
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nsresult result = NS_OK;
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nsIDOMAttr* attribute;
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if ((nsnull != mContent) && (nsnull != aNode)) {
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result = aNode->QueryInterface(kIDOMAttrIID, (void**)&attribute);
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if (NS_OK == result) {
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PLHashTable* attrHash;
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attrHash = GetAttributeTable();
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if (nsnull != attrHash) {
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nsIDOMNode* oldAttribute;
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nsIDOMAttributePrivate* attrPrivate;
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nsAutoString name, value;
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char buf[128];
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char* key;
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nsIAtom* nameAtom;
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PRInt32 nameSpaceID;
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// Get normalized attribute name
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attribute->GetName(name);
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mContent->ParseAttributeString(name, nameAtom, nameSpaceID);
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GetNormalizedName(nameSpaceID, nameAtom, name);
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name.ToCString(buf, sizeof(buf));
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result = GetNamedItemCommon(name, nameSpaceID, nameAtom, &oldAttribute);
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if (nsnull != oldAttribute) {
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nsIDOMAttributePrivate* oldAttributePrivate;
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PLHashEntry** he;
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// Remove the attribute from the hash table, cleaning
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// the hash table entry as we go about it.
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he = PL_HashTableRawLookup(attrHash, PL_HashString(buf), buf);
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key = (char*)(*he)->key;
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PL_HashTableRemove(attrHash, buf);
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if (nsnull != key) {
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delete [] key;
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}
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result = oldAttribute->QueryInterface(kIDOMAttributePrivateIID,
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(void **)&oldAttributePrivate);
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if (NS_OK == result) {
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oldAttributePrivate->DropReference();
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NS_RELEASE(oldAttributePrivate);
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}
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*aReturn = oldAttribute;
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// Drop the reference held in the hash table
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NS_RELEASE(oldAttribute);
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}
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else {
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*aReturn = nsnull;
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}
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attribute->GetValue(value);
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// Associate the new attribute with the content
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// XXX Need to fail if it's already associated with other
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// content
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key = name.ToNewCString();
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result = attribute->QueryInterface(kIDOMAttributePrivateIID,
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(void **)&attrPrivate);
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if (NS_OK == result) {
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attrPrivate->SetContent(mContent);
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attrPrivate->SetName(name);
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NS_RELEASE(attrPrivate);
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}
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// Add the new attribute node to the hash table (maintaining
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// a reference to it)
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PL_HashTableAdd(attrHash, key, attribute);
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// Set the attribute on the content
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result = mContent->SetAttribute(nameSpaceID, nameAtom, value, PR_TRUE);
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NS_IF_RELEASE(nameAtom);
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}
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}
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}
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else {
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*aReturn = nsnull;
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}
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return result;
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}
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NS_IMETHODIMP
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nsDOMAttributeMap::RemoveNamedItem(const nsString& aName, nsIDOMNode** aReturn)
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{
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nsresult result = NS_OK;
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if (nsnull != mContent) {
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PLHashTable* attrHash;
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attrHash = GetAttributeTable();
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if (nsnull != attrHash) {
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nsIDOMNode* attribute;
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nsIDOMAttributePrivate* attrPrivate;
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char buf[128];
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char* key;
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nsIAtom* nameAtom;
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PRInt32 nameSpaceID;
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nsAutoString name;
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mContent->ParseAttributeString(aName, nameAtom, nameSpaceID);
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GetNormalizedName(nameSpaceID, nameAtom, name);
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name.ToCString(buf, sizeof(buf));
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result = GetNamedItemCommon(name, nameSpaceID, nameAtom, &attribute);
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if (nsnull != attribute) {
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PLHashEntry** he;
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// Remove the attribute from the hash table, cleaning
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// the hash table entry as we go about it.
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he = PL_HashTableRawLookup(attrHash, PL_HashString(buf), buf);
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key = (char*)(*he)->key;
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PL_HashTableRemove(attrHash, buf);
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if (nsnull != key) {
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delete [] key;
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}
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result = attribute->QueryInterface(kIDOMAttributePrivateIID,
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(void **)&attrPrivate);
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if (NS_OK == result) {
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attrPrivate->DropReference();
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NS_RELEASE(attrPrivate);
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}
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*aReturn = attribute;
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// Drop the reference held in the hash table
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NS_RELEASE(attribute);
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}
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else {
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*aReturn = nsnull;
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}
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// Unset the attribute in the content
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result = mContent->UnsetAttribute(nameSpaceID, nameAtom, PR_TRUE);
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NS_IF_RELEASE(nameAtom);
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}
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}
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return result;
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}
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nsresult
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nsDOMAttributeMap::Item(PRUint32 aIndex, nsIDOMNode** aReturn)
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{
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PRInt32 nameSpaceID;
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nsIAtom* nameAtom = nsnull;
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nsresult result = NS_OK;
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if ((nsnull != mContent) &&
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NS_SUCCEEDED(mContent->GetAttributeNameAt(aIndex,
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nameSpaceID,
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nameAtom))) {
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nsAutoString attrName;
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GetNormalizedName(nameSpaceID, nameAtom, attrName);
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result = GetNamedItemCommon(attrName, nameSpaceID, nameAtom, aReturn);
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NS_IF_RELEASE(nameAtom);
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}
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else {
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*aReturn = nsnull;
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}
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return result;
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}
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nsresult
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nsDOMAttributeMap::GetLength(PRUint32 *aLength)
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{
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PRInt32 n;
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nsresult rv = NS_OK;
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if (nsnull != mContent) {
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rv = mContent->GetAttributeCount(n);
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*aLength = PRUint32(n);
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}
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else {
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*aLength = 0;
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}
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return rv;
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}
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