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375 lines
11 KiB
C++
375 lines
11 KiB
C++
/* -*- 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 "nsIXFormsSelectChild.h"
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#include "nsXFormsStubElement.h"
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#include "nsIDOMHTMLOptGroupElement.h"
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#include "nsString.h"
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#include "nsCOMPtr.h"
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#include "nsIXTFGenericElementWrapper.h"
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#include "nsIDOMDocument.h"
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#include "nsIDOMNodeList.h"
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#include "nsXFormsUtils.h"
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#include "nsArray.h"
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/**
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* Implementation of XForms \<choices\> element. This creates an HTML
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* optgroup element and inserts any childrens' anonymous content as children
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* of the optgroup.
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*/
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class nsXFormsChoicesElement : public nsXFormsStubElement,
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public nsIXFormsSelectChild
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{
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public:
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nsXFormsChoicesElement() : mElement(nsnull) {}
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NS_DECL_ISUPPORTS_INHERITED
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// nsIXTFGenericElement overrides
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NS_IMETHOD OnCreated(nsIXTFGenericElementWrapper *aWrapper);
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// nsIXTFElement overrides
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NS_IMETHOD ParentChanged(nsIDOMElement *aNewParent);
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NS_IMETHOD ChildInserted(nsIDOMNode *aChild, PRUint32 aIndex);
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NS_IMETHOD ChildAppended(nsIDOMNode *aChild);
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NS_IMETHOD ChildRemoved(PRUint32 aIndex);
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NS_IMETHOD BeginAddingChildren();
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NS_IMETHOD DoneAddingChildren();
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// nsIXFormsSelectChild
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NS_DECL_NSIXFORMSSELECTCHILD
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private:
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NS_HIDDEN_(void) Refresh();
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nsIDOMElement *mElement;
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nsCOMPtr<nsIDOMHTMLOptGroupElement> mOptGroup;
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};
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NS_IMPL_ISUPPORTS_INHERITED1(nsXFormsChoicesElement,
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nsXFormsStubElement,
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nsIXFormsSelectChild)
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NS_IMETHODIMP
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nsXFormsChoicesElement::OnCreated(nsIXTFGenericElementWrapper *aWrapper)
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{
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aWrapper->SetNotificationMask(nsIXTFElement::NOTIFY_PARENT_CHANGED |
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nsIXTFElement::NOTIFY_CHILD_INSERTED |
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nsIXTFElement::NOTIFY_CHILD_APPENDED |
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nsIXTFElement::NOTIFY_CHILD_REMOVED |
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nsIXTFElement::NOTIFY_BEGIN_ADDING_CHILDREN);
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nsCOMPtr<nsIDOMElement> node;
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aWrapper->GetElementNode(getter_AddRefs(node));
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// It's ok to keep a pointer to mElement. mElement will have an
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// owning reference to this object, so as long as we null out mElement in
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// OnDestroyed, it will always be valid.
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mElement = node;
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NS_ASSERTION(mElement, "Wrapper is not an nsIDOMElement, we'll crash soon");
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// Our anonymous content structure will look like this:
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//
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// <optgroup label="myLabel"/> (mOptGroup)
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//
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nsCOMPtr<nsIDOMDocument> domDoc;
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node->GetOwnerDocument(getter_AddRefs(domDoc));
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nsCOMPtr<nsIDOMElement> element;
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domDoc->CreateElementNS(NS_LITERAL_STRING(NS_NAMESPACE_XHTML),
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NS_LITERAL_STRING("optgroup"),
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getter_AddRefs(element));
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mOptGroup = do_QueryInterface(element);
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NS_ENSURE_TRUE(mOptGroup, NS_ERROR_FAILURE);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsChoicesElement::ParentChanged(nsIDOMElement *aNewParent)
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{
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if (aNewParent)
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Refresh();
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsChoicesElement::ChildInserted(nsIDOMNode *aChild, PRUint32 aIndex)
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{
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nsCOMPtr<nsIXFormsSelectChild> item = do_QueryInterface(aChild);
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if (item) {
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// XXX get anonymous nodes and insert them at the correct place
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} else if (nsXFormsUtils::IsLabelElement(aChild)) {
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// If a label child was inserted, we need to clone it into our
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// anonymous content.
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Refresh();
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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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nsXFormsChoicesElement::ChildAppended(nsIDOMNode *aChild)
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{
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nsCOMPtr<nsIXFormsSelectChild> item = do_QueryInterface(aChild);
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if (item) {
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// XXX get anonymous nodes and insert them at the correct place
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} else if (nsXFormsUtils::IsLabelElement(aChild)) {
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// If a label child was inserted, we need to clone it into our
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// anonymous content.
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Refresh();
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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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nsXFormsChoicesElement::ChildRemoved(PRUint32 aIndex)
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{
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// TODO: should remove the anonymous content owned by the removed item.
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// TOOD: only need to Refresh() when a label child is removed, but it's
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// not possible to get ahold of the actual removed child at this point.
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Refresh();
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsChoicesElement::BeginAddingChildren()
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{
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// Suppress child notifications until we're done getting children.
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nsCOMPtr<nsIXTFElementWrapper> wrapper = do_QueryInterface(mElement);
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NS_ASSERTION(wrapper, "huh? our element must be an xtf wrapper");
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wrapper->SetNotificationMask(nsIXTFElement::NOTIFY_PARENT_CHANGED |
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nsIXTFElement::NOTIFY_DONE_ADDING_CHILDREN);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsChoicesElement::DoneAddingChildren()
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{
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// Unsuppress notifications
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nsCOMPtr<nsIXTFElementWrapper> wrapper = do_QueryInterface(mElement);
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NS_ASSERTION(wrapper, "huh? our element must be an xtf wrapper");
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wrapper->SetNotificationMask(nsIXTFElement::NOTIFY_PARENT_CHANGED |
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nsIXTFElement::NOTIFY_CHILD_INSERTED |
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nsIXTFElement::NOTIFY_CHILD_APPENDED |
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nsIXTFElement::NOTIFY_CHILD_REMOVED);
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// Walk our children and get their anonymous content.
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nsCOMPtr<nsIDOMNodeList> children;
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nsresult rv = mElement->GetChildNodes(getter_AddRefs(children));
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NS_ENSURE_SUCCESS(rv, rv);
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nsCOMPtr<nsIDOMNode> childNode, childAnonymousNode, nodeReturn;
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nsCOMPtr<nsIXFormsSelectChild> childItem;
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PRUint32 childCount = 0;
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children->GetLength(&childCount);
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for (PRUint32 i = 0; i < childCount; ++i) {
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children->Item(i, getter_AddRefs(childNode));
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childItem = do_QueryInterface(childNode);
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if (childItem) {
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nsCOMPtr<nsIArray> childItems;
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childItem->GetAnonymousNodes(getter_AddRefs(childItems));
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if (childItems) {
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PRUint32 childNodesLength = 0;
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childItems->GetLength(&childNodesLength);
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for (PRUint32 j = 0; j < childNodesLength; ++j) {
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childAnonymousNode = do_QueryElementAt(childItems, j);
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mOptGroup->AppendChild(childAnonymousNode,
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getter_AddRefs(nodeReturn));
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}
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}
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}
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}
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// Assume that we've got something worth refreshing now.
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Refresh();
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return NS_OK;
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}
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// nsIXFormsSelectChild
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NS_IMETHODIMP
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nsXFormsChoicesElement::GetAnonymousNodes(nsIArray **aNodes)
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{
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nsCOMPtr<nsIMutableArray> array;
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nsresult rv = NS_NewArray(getter_AddRefs(array));
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NS_ENSURE_SUCCESS(rv, rv);
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array->AppendElement(mOptGroup, PR_FALSE);
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NS_ADDREF(*aNodes = array);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsChoicesElement::SelectItemsByValue(const nsStringArray &aValueList)
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{
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nsCOMPtr<nsIDOMNodeList> children;
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nsresult rv = mElement->GetChildNodes(getter_AddRefs(children));
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NS_ENSURE_SUCCESS(rv, rv);
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PRUint32 childCount = 0;
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children->GetLength(&childCount);
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nsCOMPtr<nsIDOMNode> childNode;
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nsCOMPtr<nsIXFormsSelectChild> childItem;
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for (PRUint32 i = 0; i < childCount; ++i) {
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children->Item(i, getter_AddRefs(childNode));
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childItem = do_QueryInterface(childNode);
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if (childItem) {
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childItem->SelectItemsByValue(aValueList);
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}
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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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nsXFormsChoicesElement::SelectItemsByContent(nsIDOMNode *aNode)
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{
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// Not applicable for choices element.
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return NS_OK;
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}
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NS_IMETHODIMP
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nsXFormsChoicesElement::WriteSelectedItems(nsIDOMNode *aContainer)
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{
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nsCOMPtr<nsIDOMNodeList> children;
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nsresult rv = mElement->GetChildNodes(getter_AddRefs(children));
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NS_ENSURE_SUCCESS(rv, rv);
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PRUint32 childCount = 0;
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children->GetLength(&childCount);
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nsCOMPtr<nsIDOMNode> childNode;
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nsCOMPtr<nsIXFormsSelectChild> childItem;
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for (PRUint32 i = 0; i < childCount; ++i) {
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children->Item(i, getter_AddRefs(childNode));
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childItem = do_QueryInterface(childNode);
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if (childItem) {
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childItem->WriteSelectedItems(aContainer);
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}
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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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nsXFormsChoicesElement::SetContext(nsIDOMElement *aContextNode,
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PRInt32 aContextPosition,
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PRInt32 aContextSize)
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{
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// choices cannot be created by an itemset, so we don't need to worry
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// about this case.
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return NS_OK;
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}
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// internal methods
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void
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nsXFormsChoicesElement::Refresh()
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{
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// Remove any existing first child that is not an option, to clear out
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// any existing label.
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nsCOMPtr<nsIDOMNode> firstChild, child2;
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nsresult rv = mOptGroup->GetFirstChild(getter_AddRefs(firstChild));
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if (NS_FAILED(rv))
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return;
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nsAutoString value;
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if (firstChild) {
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firstChild->GetLocalName(value);
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if (!value.EqualsLiteral("option")) {
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mOptGroup->RemoveChild(firstChild, getter_AddRefs(child2));
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mOptGroup->GetFirstChild(getter_AddRefs(firstChild));
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}
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}
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// We need to find our label element and clone it into the optgroup.
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// This content will appear before any of the optgroup's options.
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nsCOMPtr<nsIDOMNodeList> children;
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rv = mElement->GetChildNodes(getter_AddRefs(children));
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if (NS_FAILED(rv))
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return;
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PRUint32 childCount;
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children->GetLength(&childCount);
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nsCOMPtr<nsIDOMNode> child;
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nsAutoString labelValue;
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for (PRUint32 i = 0; i < childCount; ++i) {
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children->Item(i, getter_AddRefs(child));
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if (nsXFormsUtils::IsLabelElement(child)) {
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// Clone our label into the optgroup
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child->CloneNode(PR_TRUE, getter_AddRefs(child2));
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mOptGroup->InsertBefore(child2, firstChild, getter_AddRefs(child));
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}
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}
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}
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NS_HIDDEN_(nsresult)
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NS_NewXFormsChoicesElement(nsIXTFElement **aResult)
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{
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*aResult = new nsXFormsChoicesElement();
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if (!*aResult)
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return NS_ERROR_OUT_OF_MEMORY;
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NS_ADDREF(*aResult);
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return NS_OK;
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}
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