2004-10-13 13:51:52 +04:00
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla XForms support.
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*
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* The Initial Developer of the Original Code is
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* IBM Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2004
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Brian Ryner <bryner@brianryner.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsXFormsInstanceElement.h"
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#include "nsIDOMElement.h"
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#include "nsIDOMEventTarget.h"
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#include "nsIDOM3Node.h"
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#include "nsMemory.h"
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#include "nsXFormsAtoms.h"
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#include "nsString.h"
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#include "nsIDOMEventReceiver.h"
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#include "nsIDOMXMLDocument.h"
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#include "nsIDOMDOMImplementation.h"
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static const nsIID sScriptingIIDs[] = {
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NS_IDOMELEMENT_IID,
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NS_IDOMEVENTTARGET_IID,
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NS_IDOM3NODE_IID
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};
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NS_IMPL_ADDREF(nsXFormsInstanceElement)
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NS_IMPL_RELEASE(nsXFormsInstanceElement)
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NS_INTERFACE_MAP_BEGIN(nsXFormsInstanceElement)
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NS_INTERFACE_MAP_ENTRY(nsIXTFGenericElement)
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NS_INTERFACE_MAP_ENTRY(nsIXTFElement)
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NS_INTERFACE_MAP_ENTRY(nsIXTFPrivate)
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NS_INTERFACE_MAP_ENTRY(nsIDOMLoadListener)
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NS_INTERFACE_MAP_ENTRY(nsIDOMEventListener)
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NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIXTFGenericElement)
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NS_INTERFACE_MAP_END
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NS_IMETHODIMP
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nsXFormsInstanceElement::OnDestroyed()
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{
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nsCOMPtr<nsIDOMEventReceiver> rec = do_QueryInterface(mDocument);
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if (rec)
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rec->RemoveEventListenerByIID(this, NS_GET_IID(nsIDOMLoadListener));
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsInstanceElement::GetElementType(PRUint32 *aElementType)
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{
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*aElementType = nsIXTFElement::ELEMENT_TYPE_GENERIC_ELEMENT;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsInstanceElement::GetIsAttributeHandler(PRBool *aIsAttributeHandler)
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{
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*aIsAttributeHandler = PR_FALSE;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsInstanceElement::GetScriptingInterfaces(PRUint32 *aCount,
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nsIID ***aArray)
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{
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return CloneScriptingInterfaces(sScriptingIIDs,
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NS_ARRAY_LENGTH(sScriptingIIDs),
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aCount, aArray);
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}
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NS_IMETHODIMP
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nsXFormsInstanceElement::WillChangeDocument(nsIDOMDocument *aNewDocument)
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{
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsInstanceElement::DocumentChanged(nsIDOMDocument *aNewDocument)
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{
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsInstanceElement::WillChangeParent(nsIDOMElement *aNewParent)
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{
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsInstanceElement::ParentChanged(nsIDOMElement *aNewParent)
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{
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsInstanceElement::WillInsertChild(nsIDOMNode *aChild, PRUint32 aIndex)
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{
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsInstanceElement::ChildInserted(nsIDOMNode *aChild, PRUint32 aIndex)
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{
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsInstanceElement::WillAppendChild(nsIDOMNode *aChild)
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{
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsInstanceElement::ChildAppended(nsIDOMNode *aChild)
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{
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsInstanceElement::WillRemoveChild(PRUint32 aIndex)
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{
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsInstanceElement::ChildRemoved(PRUint32 aIndex)
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{
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsInstanceElement::WillSetAttribute(nsIAtom *aName,
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const nsAString &aNewValue)
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{
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsInstanceElement::AttributeSet(nsIAtom *aName,
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const nsAString &aNewValue)
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{
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if (aName == nsXFormsAtoms::src) {
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// Note that this will fail if encountered during document construction,
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// because we won't be in the document yet, so CreateInstanceDocument
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// won't find a document to work with. That's ok, we'll fix things after
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// our children are appended and we're in the document (DoneAddingChildren)
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LoadExternalInstance(aNewValue);
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsInstanceElement::WillRemoveAttribute(nsIAtom *aName)
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{
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsInstanceElement::AttributeRemoved(nsIAtom *aName)
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{
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if (aName == nsXFormsAtoms::src) {
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// We no longer have an external instance to use.
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// Reset our instance document to whatever inline content we have.
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return CloneInlineInstance();
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsInstanceElement::DoneAddingChildren()
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{
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// By the time this is called, we should be inserted in the document
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// and have all of our child elements, so this is our first opportunity
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// to create the instance document.
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nsCOMPtr<nsIDOMElement> element;
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mWrapper->GetElementNode(getter_AddRefs(element));
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NS_ASSERTION(element, "no wrapper element");
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nsAutoString src;
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element->GetAttribute(NS_LITERAL_STRING("src"), src);
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if (src.IsEmpty()) {
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// If we don't have a linked external instance, use our inline data.
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CloneInlineInstance();
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} else {
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LoadExternalInstance(src);
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}
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return NS_OK;
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}
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2004-10-13 22:50:15 +04:00
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NS_IMETHODIMP
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nsXFormsInstanceElement::HandleDefault(nsIDOMEvent *aEvent, PRBool *aHandled)
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{
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*aHandled = PR_FALSE;
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return NS_OK;
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}
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2004-10-13 13:51:52 +04:00
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NS_IMETHODIMP
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nsXFormsInstanceElement::OnCreated(nsIXTFGenericElementWrapper *aWrapper)
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{
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aWrapper->SetNotificationMask (nsIXTFElement::NOTIFY_PARENT_CHANGED |
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nsIXTFElement::NOTIFY_ATTRIBUTE_SET |
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nsIXTFElement::NOTIFY_ATTRIBUTE_REMOVED |
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nsIXTFElement::NOTIFY_DONE_ADDING_CHILDREN);
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mWrapper = aWrapper;
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return NS_OK;
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}
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// nsIDOMLoadListener
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NS_IMETHODIMP
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nsXFormsInstanceElement::Load(nsIDOMEvent *aEvent)
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{
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nsXFormsModelElement *model = GetModel();
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if (model)
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model->RemovePendingInstance();
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsInstanceElement::BeforeUnload(nsIDOMEvent *aEvent)
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{
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsInstanceElement::Unload(nsIDOMEvent *aEvent)
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{
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsInstanceElement::Abort(nsIDOMEvent *aEvent)
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{
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nsXFormsModelElement *model = GetModel();
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if (model) {
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model->RemovePendingInstance();
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model->DispatchEvent(eEvent_LinkException);
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsInstanceElement::Error(nsIDOMEvent *aEvent)
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{
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nsXFormsModelElement *model = GetModel();
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if (model) {
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model->RemovePendingInstance();
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model->DispatchEvent(eEvent_LinkException);
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}
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return NS_OK;
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}
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// nsIDOMEventListener
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NS_IMETHODIMP
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nsXFormsInstanceElement::HandleEvent(nsIDOMEvent *aEvent)
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{
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return NS_OK;
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}
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// nsIXTFPrivate
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NS_IMETHODIMP
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nsXFormsInstanceElement::GetInner(nsISupports **aInner)
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{
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NS_ENSURE_ARG_POINTER(aInner);
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NS_ADDREF(*aInner = NS_STATIC_CAST(nsIXTFGenericElement*, this));
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return NS_OK;
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}
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// private methods
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nsresult
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nsXFormsInstanceElement::CloneInlineInstance()
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{
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// Clear out our existing instance data
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nsresult rv = CreateInstanceDocument();
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if (NS_FAILED(rv))
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return rv; // don't warn, we might just not be in the document yet
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// look for our first child element (skip over text nodes, etc.)
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nsCOMPtr<nsIDOMElement> element;
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mWrapper->GetElementNode(getter_AddRefs(element));
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nsCOMPtr<nsIDOMNode> child, temp;
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element->GetFirstChild(getter_AddRefs(child));
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while (child) {
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PRUint16 nodeType;
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child->GetNodeType(&nodeType);
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if (nodeType == nsIDOMNode::ELEMENT_NODE)
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break;
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temp.swap(child);
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temp->GetNextSibling(getter_AddRefs(child));
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}
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if (child) {
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nsCOMPtr<nsIDOMNode> newNode;
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rv = mDocument->ImportNode(child, PR_TRUE, getter_AddRefs(newNode));
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NS_ENSURE_SUCCESS(rv, rv);
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nsCOMPtr<nsIDOMNode> nodeReturn;
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rv = mDocument->AppendChild(newNode, getter_AddRefs(nodeReturn));
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NS_WARN_IF_FALSE(NS_SUCCEEDED(rv), "failed to append root instance node");
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}
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return rv;
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}
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void
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nsXFormsInstanceElement::LoadExternalInstance(const nsAString &aSrc)
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{
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// Clear out our existing instance data
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if (NS_FAILED(CreateInstanceDocument()))
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return;
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nsCOMPtr<nsIDOMEventReceiver> rec = do_QueryInterface(mDocument);
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rec->AddEventListenerByIID(this, NS_GET_IID(nsIDOMLoadListener));
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nsCOMPtr<nsIDOMXMLDocument> xmlDoc = do_QueryInterface(mDocument);
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NS_ASSERTION(xmlDoc, "we created a document but it's not an XMLDocument?");
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nsCOMPtr<nsIDOMElement> element;
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mWrapper->GetElementNode(getter_AddRefs(element));
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PRBool success;
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xmlDoc->Load(aSrc, &success);
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nsXFormsModelElement *model = GetModel();
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if (model) {
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if (success)
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model->AddPendingInstance();
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else
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model->DispatchEvent(eEvent_LinkException);
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}
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}
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nsresult
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nsXFormsInstanceElement::CreateInstanceDocument()
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{
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nsCOMPtr<nsIDOMElement> element;
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mWrapper->GetElementNode(getter_AddRefs(element));
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NS_ASSERTION(element, "no wrapper element");
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nsCOMPtr<nsIDOMDocument> doc;
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nsresult rv = element->GetOwnerDocument(getter_AddRefs(doc));
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NS_ENSURE_SUCCESS(rv, rv);
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|
|
if (!doc) // could be we just aren't inserted yet, so don't warn
|
|
|
|
return NS_ERROR_FAILURE;
|
|
|
|
|
|
|
|
nsCOMPtr<nsIDOMDOMImplementation> domImpl;
|
|
|
|
rv = doc->GetImplementation(getter_AddRefs(domImpl));
|
|
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
|
|
|
|
return domImpl->CreateDocument(EmptyString(), EmptyString(), nsnull,
|
|
|
|
getter_AddRefs(mDocument));
|
|
|
|
}
|
|
|
|
|
|
|
|
nsXFormsModelElement*
|
|
|
|
nsXFormsInstanceElement::GetModel()
|
|
|
|
{
|
|
|
|
nsCOMPtr<nsIDOMElement> element;
|
|
|
|
mWrapper->GetElementNode(getter_AddRefs(element));
|
|
|
|
NS_ASSERTION(element, "no wrapper element");
|
|
|
|
|
|
|
|
nsCOMPtr<nsIDOMNode> parentNode;
|
|
|
|
element->GetParentNode(getter_AddRefs(parentNode));
|
|
|
|
|
|
|
|
nsCOMPtr<nsIXFormsModelElement> modelElt = do_QueryInterface(parentNode);
|
|
|
|
if (!modelElt)
|
|
|
|
return nsnull;
|
|
|
|
|
|
|
|
nsCOMPtr<nsIXTFPrivate> xtfPriv = do_QueryInterface(modelElt);
|
|
|
|
NS_ENSURE_TRUE(xtfPriv, nsnull);
|
|
|
|
|
|
|
|
nsCOMPtr<nsISupports> modelInner;
|
|
|
|
xtfPriv->GetInner(getter_AddRefs(modelInner));
|
|
|
|
NS_ENSURE_TRUE(modelInner, nsnull);
|
|
|
|
|
|
|
|
nsISupports *isupp = NS_STATIC_CAST(nsISupports*, modelInner.get());
|
|
|
|
return NS_STATIC_CAST(nsXFormsModelElement*,
|
|
|
|
NS_STATIC_CAST(nsIXFormsModelElement*, isupp));
|
|
|
|
}
|
|
|
|
|
|
|
|
nsresult
|
|
|
|
NS_NewXFormsInstanceElement(nsIXTFElement **aResult)
|
|
|
|
{
|
|
|
|
*aResult = new nsXFormsInstanceElement();
|
|
|
|
if (!*aResult)
|
|
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
|
|
|
|
NS_ADDREF(*aResult);
|
|
|
|
return NS_OK;
|
|
|
|
}
|