pjs/extensions/xforms/nsXFormsItemElement.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla XForms support.
*
* The Initial Developer of the Original Code is
* IBM Corporation.
* Portions created by the Initial Developer are Copyright (C) 2004
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Brian Ryner <bryner@brianryner.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsIXFormsSelectChild.h"
#include "nsXFormsStubElement.h"
#include "nsIDOMHTMLOptionElement.h"
#include "nsXFormsAtoms.h"
#include "nsIDOMNodeList.h"
#include "nsIDOMDocument.h"
#include "nsString.h"
#include "nsXFormsUtils.h"
#include "nsIXFormsValueElement.h"
#include "nsArray.h"
#include "nsVoidArray.h"
#include "nsIDOMText.h"
#include "nsIXTFBindableElementWrapper.h"
#include "nsIXFormsContextControl.h"
#include "nsIModelElementPrivate.h"
#include "nsIXFormsItemElement.h"
#include "nsIXFormsControl.h"
#include "nsIXFormsLabelElement.h"
#include "nsIDocument.h"
#include "nsXFormsModelElement.h"
/**
* nsXFormsItemElement implements the XForms \<item\> element.
* It creates an anonymous HTML option element with the appropriate label,
* which is inserted into the anonymous content tree of the containing
* select element.
*/
class nsXFormsItemElement : public nsXFormsBindableStub,
public nsIXFormsSelectChild,
public nsIXFormsItemElement
{
public:
nsXFormsItemElement() : mElement(nsnull), mDoneAddingChildren(PR_FALSE)
{
}
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_NSIXFORMSITEMELEMENT
NS_IMETHOD OnCreated(nsIXTFBindableElementWrapper *aWrapper);
// nsIXTFElement overrides
NS_IMETHOD ParentChanged(nsIDOMElement *aNewParent);
NS_IMETHOD ChildInserted(nsIDOMNode *aChild, PRUint32 aIndex);
NS_IMETHOD ChildAppended(nsIDOMNode *aChild);
NS_IMETHOD WillRemoveChild(PRUint32 aIndex);
NS_IMETHOD BeginAddingChildren();
NS_IMETHOD DoneAddingChildren();
void Refresh();
// nsIXFormsSelectChild
NS_DECL_NSIXFORMSSELECTCHILD
private:
nsIDOMElement* mElement;
PRBool mDoneAddingChildren;
};
NS_IMPL_ISUPPORTS_INHERITED2(nsXFormsItemElement,
nsXFormsBindableStub,
nsIXFormsSelectChild,
nsIXFormsItemElement)
NS_IMETHODIMP
nsXFormsItemElement::OnCreated(nsIXTFBindableElementWrapper *aWrapper)
{
nsresult rv = nsXFormsBindableStub::OnCreated(aWrapper);
NS_ENSURE_SUCCESS(rv, rv);
aWrapper->SetNotificationMask(nsIXTFElement::NOTIFY_PARENT_CHANGED |
nsIXTFElement::NOTIFY_CHILD_INSERTED |
nsIXTFElement::NOTIFY_CHILD_APPENDED |
nsIXTFElement::NOTIFY_WILL_REMOVE_CHILD |
nsIXTFElement::NOTIFY_BEGIN_ADDING_CHILDREN |
nsIXTFElement::NOTIFY_DONE_ADDING_CHILDREN);
nsCOMPtr<nsIDOMElement> node;
aWrapper->GetElementNode(getter_AddRefs(node));
// It's ok to keep a pointer to mElement. mElement will have an
// owning reference to this object, so as long as we null out mElement in
// OnDestroyed, it will always be valid.
mElement = node;
NS_ASSERTION(mElement, "Wrapper is not an nsIDOMElement, we'll crash soon");
return NS_OK;
}
NS_IMETHODIMP
nsXFormsItemElement::ParentChanged(nsIDOMElement *aNewParent)
{
if (aNewParent) {
Refresh();
}
return NS_OK;
}
NS_IMETHODIMP
nsXFormsItemElement::ChildInserted(nsIDOMNode *aChild, PRUint32 aIndex)
{
// If a label child was inserted, we need to clone it into our
// anonymous content.
if (nsXFormsUtils::IsLabelElement(aChild))
Refresh();
return NS_OK;
}
NS_IMETHODIMP
nsXFormsItemElement::ChildAppended(nsIDOMNode *aChild)
{
// If a label child was inserted, we need to clone it into our
// anonymous content.
if (nsXFormsUtils::IsLabelElement(aChild))
Refresh();
return NS_OK;
}
NS_IMETHODIMP
nsXFormsItemElement::WillRemoveChild(PRUint32 aIndex)
{
nsCOMPtr<nsIDOMNodeList> children;
nsresult rv = mElement->GetChildNodes(getter_AddRefs(children));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIDOMNode> child;
children->Item(aIndex, getter_AddRefs(child));
if (child && nsXFormsUtils::IsLabelElement(child)) {
// If a label child was removed, we need to remove the label from our
// anonymous content.
Refresh();
}
return NS_OK;
}
NS_IMETHODIMP
nsXFormsItemElement::BeginAddingChildren()
{
// Suppress child notifications until we're done getting children.
nsCOMPtr<nsIXTFElementWrapper> wrapper = do_QueryInterface(mElement);
NS_ASSERTION(wrapper, "huh? our element must be an xtf wrapper");
wrapper->SetNotificationMask(nsIXTFElement::NOTIFY_PARENT_CHANGED |
nsIXTFElement::NOTIFY_DONE_ADDING_CHILDREN);
return NS_OK;
}
NS_IMETHODIMP
nsXFormsItemElement::DoneAddingChildren()
{
mDoneAddingChildren = PR_TRUE;
// Unsuppress notifications
nsCOMPtr<nsIXTFElementWrapper> wrapper = do_QueryInterface(mElement);
NS_ASSERTION(wrapper, "huh? our element must be an xtf wrapper");
wrapper->SetNotificationMask(nsIXTFElement::NOTIFY_PARENT_CHANGED |
nsIXTFElement::NOTIFY_CHILD_INSERTED |
nsIXTFElement::NOTIFY_CHILD_APPENDED |
nsIXTFElement::NOTIFY_WILL_REMOVE_CHILD);
// Assume that we've got something worth refreshing now.
Refresh();
return NS_OK;
}
// nsIXFormsSelectChild
NS_IMETHODIMP
nsXFormsItemElement::SelectItemByValue(const nsAString &aValue, nsIDOMNode **aSelected)
{
NS_ENSURE_ARG_POINTER(aSelected);
NS_ENSURE_STATE(mElement);
nsAutoString value;
GetValue(value);
if (aValue.Equals(value)) {
NS_ADDREF(*aSelected = mElement);
} else {
*aSelected = nsnull;
}
return NS_OK;
}
NS_IMETHODIMP
nsXFormsItemElement::GetValue(nsAString &aValue)
{
nsCOMPtr<nsIDOMNode> firstChild, container;
mElement->GetFirstChild(getter_AddRefs(firstChild));
// If this element is generated inside an <itemset>,
// there is a <contextcontainer> element between this element
// and the actual childnodes.
if (nsXFormsUtils::IsXFormsElement(firstChild,
NS_LITERAL_STRING("contextcontainer"))) {
container = firstChild;
} else {
container = mElement;
}
// Find our value child and get its text content.
nsCOMPtr<nsIDOMNodeList> children;
nsresult rv = container->GetChildNodes(getter_AddRefs(children));
NS_ENSURE_SUCCESS(rv, rv);
PRUint32 childCount;
children->GetLength(&childCount);
nsCOMPtr<nsIDOMNode> child;
nsAutoString value;
for (PRUint32 i = 0; i < childCount; ++i) {
children->Item(i, getter_AddRefs(child));
nsCOMPtr<nsIXFormsValueElement> valueElement = do_QueryInterface(child);
if (valueElement) {
return valueElement->GetValue(aValue);
}
}
// No value children, so our value is empty
aValue.Truncate(0);
return NS_OK;
}
void
nsXFormsItemElement::Refresh()
{
if (mDoneAddingChildren) {
nsCOMPtr<nsIDOMNode> parent, current;
current = mElement;
do {
current->GetParentNode(getter_AddRefs(parent));
if (nsXFormsUtils::IsXFormsElement(parent, NS_LITERAL_STRING("select1")) ||
nsXFormsUtils::IsXFormsElement(parent, NS_LITERAL_STRING("select"))) {
nsCOMPtr<nsIXFormsControl> select(do_QueryInterface(parent));
if (select) {
select->Refresh();
}
return;
}
current = parent;
} while(current);
}
}
NS_IMETHODIMP
nsXFormsItemElement::SetActive(PRBool aActive)
{
/// @see comment in nsIXFormsItemElement.idl
NS_NAMED_LITERAL_STRING(active, "_moz_active");
return aActive ?
mElement->SetAttribute(active, NS_LITERAL_STRING("1")) :
mElement->RemoveAttribute(active);
}
NS_IMETHODIMP
nsXFormsItemElement::GetLabelText(nsAString& aValue)
{
NS_ENSURE_STATE(mElement);
aValue.Truncate(0);
nsCOMPtr<nsIDOMNode> firstChild, container;
mElement->GetFirstChild(getter_AddRefs(firstChild));
// If this element is generated inside an <itemset>,
// there is a <contextcontainer> element between this element
// and the actual childnodes.
if (nsXFormsUtils::IsXFormsElement(firstChild,
NS_LITERAL_STRING("contextcontainer"))) {
container = firstChild;
} else {
container = mElement;
}
nsCOMPtr<nsIDOMNodeList> children;
container->GetChildNodes(getter_AddRefs(children));
NS_ENSURE_STATE(children);
PRUint32 childCount;
children->GetLength(&childCount);
nsCOMPtr<nsIDOMDocument> doc;
mElement->GetOwnerDocument(getter_AddRefs(doc));
nsCOMPtr<nsIDOMNode> child;
for (PRUint32 i = 0; i < childCount; ++i) {
children->Item(i, getter_AddRefs(child));
if (nsXFormsUtils::IsXFormsElement(child, NS_LITERAL_STRING("label"))) {
nsCOMPtr<nsIXFormsLabelElement> label(do_QueryInterface(child));
if (label) {
label->GetTextValue(aValue);
return NS_OK;
}
}
}
return NS_OK;
}
NS_IMETHODIMP
nsXFormsItemElement::LabelRefreshed()
{
NS_ENSURE_STATE(mElement);
nsCOMPtr<nsIDOMNode> parent, current;
current = mElement;
do {
current->GetParentNode(getter_AddRefs(parent));
if (nsXFormsUtils::IsXFormsElement(parent, NS_LITERAL_STRING("select1")) ||
nsXFormsUtils::IsXFormsElement(parent, NS_LITERAL_STRING("select"))) {
nsCOMPtr<nsIXFormsControl> select(do_QueryInterface(parent));
if (select) {
select->Refresh();
}
return NS_OK;
}
current = parent;
} while(current);
return NS_OK;
}
NS_HIDDEN_(nsresult)
NS_NewXFormsItemElement(nsIXTFElement **aResult)
{
*aResult = new nsXFormsItemElement();
if (!*aResult)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*aResult);
return NS_OK;
}