286 строки
8.5 KiB
C++
286 строки
8.5 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 "nsIXTFBindableElementWrapper.h"
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#include "nsIDOMDocument.h"
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#include "nsIDOMNodeList.h"
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#include "nsIXFormsControl.h"
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#include "nsXFormsUtils.h"
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#include "nsArray.h"
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#include "nsIXTFXMLVisualWrapper.h"
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class nsXFormsChoicesElement : public nsXFormsBindableStub,
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public nsIXFormsSelectChild
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{
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public:
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nsXFormsChoicesElement() : mElement(nsnull), mDoneAddingChildren(PR_FALSE) {}
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NS_DECL_ISUPPORTS_INHERITED
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NS_IMETHOD OnCreated(nsIXTFBindableElementWrapper *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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nsIDOMElement* mElement;
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PRBool mDoneAddingChildren;
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void Refresh();
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};
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NS_IMPL_ISUPPORTS_INHERITED1(nsXFormsChoicesElement,
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nsXFormsBindableStub,
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nsIXFormsSelectChild)
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NS_IMETHODIMP
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nsXFormsChoicesElement::OnCreated(nsIXTFBindableElementWrapper *aWrapper)
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{
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nsresult rv = nsXFormsBindableStub::OnCreated(aWrapper);
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NS_ENSURE_SUCCESS(rv, rv);
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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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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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}
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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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// XXX: 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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mDoneAddingChildren = PR_TRUE;
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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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// 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::SelectItemByValue(const nsAString &aValue, nsIDOMNode **aSelected)
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{
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NS_ENSURE_ARG_POINTER(aSelected);
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NS_ENSURE_STATE(mElement);
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*aSelected = nsnull;
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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->SelectItemByValue(aValue, aSelected);
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if (*aSelected)
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return NS_OK;
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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::SelectItemByNode(nsIDOMNode *aNode,
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nsIDOMNode **aSelected)
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{
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NS_ENSURE_ARG_POINTER(aSelected);
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NS_ENSURE_STATE(mElement);
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*aSelected = nsnull;
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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->SelectItemByNode(aNode, aSelected);
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if (*aSelected)
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return NS_OK;
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}
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}
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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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if (mDoneAddingChildren) {
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nsCOMPtr<nsIDOMNode> parent, current;
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current = mElement;
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do {
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current->GetParentNode(getter_AddRefs(parent));
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if (nsXFormsUtils::IsXFormsElement(parent, NS_LITERAL_STRING("select1")) ||
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nsXFormsUtils::IsXFormsElement(parent, NS_LITERAL_STRING("select"))) {
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nsCOMPtr<nsIXFormsControl> select(do_QueryInterface(parent));
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if (select) {
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select->Refresh();
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}
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return;
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}
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current = parent;
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} while(current);
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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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