pjs/extensions/xforms/nsXFormsContextContainer.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
* Novell, Inc.
* Portions created by the Initial Developer are Copyright (C) 2004
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Allan Beaufour <abeaufour@novell.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 "nsIXTFBindableElementWrapper.h"
#include "nsCOMPtr.h"
#include "nsAutoPtr.h"
#include "nsString.h"
#include "nsIDOM3Node.h"
#include "nsIDOMDocument.h"
#include "nsIDOMElement.h"
#include "nsIDOMEvent.h"
#include "nsIDOMNSEvent.h"
#include "nsIDOMEventTarget.h"
#include "nsIDOMSerializer.h"
#include "nsIDOMXPathResult.h"
#include "nsXFormsControlStub.h"
#include "nsIModelElementPrivate.h"
#include "nsIXFormsContextControl.h"
#include "nsIXFormsRepeatItemElement.h"
#include "nsIXFormsRepeatElement.h"
#include "nsXFormsUtils.h"
#ifdef DEBUG
//#define DEBUG_XF_CONTEXTCONTAINER
#endif
class nsXFormsContextContainer;
class nsXFormsFocusListener : public nsIDOMEventListener {
public:
nsXFormsFocusListener(nsXFormsContextContainer* aContainer)
: mContainer(aContainer) {}
NS_DECL_ISUPPORTS
NS_DECL_NSIDOMEVENTLISTENER
void Detach()
{
mContainer = nsnull;
}
protected:
nsXFormsContextContainer* mContainer;
};
/**
* Implementation of \<contextcontainer\>.
*
* \<contextcontainer\> is a pseudo-element that is wrapped around each row in
* an "unrolled" \<repeat\> or \<itemset\>. @see nsXFormsRepeatElement and
* nsXFormsItemSetElement.
*
* @todo Support ::repeat-item and ::repeat-index pseudo-elements. (XXX)
* @see http://www.w3.org/TR/xforms/sliceF.html#id2645142
* @see http://bugzilla.mozilla.org/show_bug.cgi?id=271724
*/
class nsXFormsContextContainer : public nsXFormsBindableControlStub,
public nsIXFormsRepeatItemElement
{
protected:
/** The handler for the focus event */
nsRefPtr<nsXFormsFocusListener> mFocusListener;
/** The context position for the element */
PRInt32 mContextPosition;
/** The context size for the element */
PRInt32 mContextSize;
/** Does this element have the repeat-index? */
PRPackedBool mHasIndex;
/** Has context changed since last bind? */
PRPackedBool mContextIsDirty;
public:
nsXFormsContextContainer()
: mContextPosition(1), mContextSize(1), mHasIndex(PR_FALSE),
mContextIsDirty(PR_FALSE) {}
NS_DECL_ISUPPORTS_INHERITED
// nsIXTFElement overrides
NS_IMETHOD CloneState(nsIDOMElement *aElement);
NS_IMETHOD DocumentChanged(nsIDOMDocument *aNewDocument);
// nsIXFormsControl
NS_IMETHOD Bind(PRBool *aContextChanged);
NS_IMETHOD SetContext(nsIDOMNode *aContextNode,
PRInt32 aContextPosition,
PRInt32 aContextSize);
NS_IMETHOD GetContext(nsAString &aModelID,
nsIDOMNode **aContextNode,
PRInt32 *aContextPosition,
PRInt32 *aContextSize);
NS_IMETHOD IsEventTarget(PRBool *aOK);
// nsIXFormsRepeatItemElement
NS_DECL_NSIXFORMSREPEATITEMELEMENT
nsresult HandleFocus(nsIDOMEvent *aEvent);
#ifdef DEBUG_smaug
virtual const char* Name() {
if (mElement) {
nsAutoString localName;
mElement->GetLocalName(localName);
return NS_ConvertUTF16toUTF8(localName).get();
}
return "contextcontainer(inline?)";
}
#endif
};
NS_IMPL_ISUPPORTS1(nsXFormsFocusListener, nsIDOMEventListener)
NS_IMETHODIMP
nsXFormsFocusListener::HandleEvent(nsIDOMEvent* aEvent)
{
return mContainer ? mContainer->HandleFocus(aEvent) : NS_OK;
}
NS_IMPL_ISUPPORTS_INHERITED1(nsXFormsContextContainer,
nsXFormsBindableControlStub,
nsIXFormsRepeatItemElement)
nsresult
nsXFormsContextContainer::HandleFocus(nsIDOMEvent *aEvent)
{
if (!aEvent || !mElement)
return NS_OK;
if (!nsXFormsUtils::EventHandlingAllowed(aEvent, mElement))
return NS_OK;
// Need to explicitly create the parent chain. This ensures that this code
// works both in 1.8, which has the old event dispatching code, and also in
// the later versions of Gecko with the new event dispatching.
// See also Bug 331081.
nsCOMPtr<nsIDOMNSEvent> event = do_QueryInterface(aEvent);
NS_ENSURE_STATE(event);
nsCOMPtr<nsIDOMEventTarget> target;
event->GetOriginalTarget(getter_AddRefs(target));
nsCOMPtr<nsIDOMNode> currentNode = do_QueryInterface(target);
nsCOMArray<nsIDOMNode> containerStack(4);
while (currentNode) {
nsCOMPtr<nsIXFormsRepeatItemElement> repeatItem =
do_QueryInterface(currentNode);
if (repeatItem) {
containerStack.AppendObject(currentNode);
}
nsCOMPtr<nsIDOMNode> parent;
currentNode->GetParentNode(getter_AddRefs(parent));
currentNode.swap(parent);
}
for (PRInt32 i = containerStack.Count() - 1; i >= 0; --i) {
nsCOMPtr<nsIDOMNode> node = containerStack[i];
if (node) {
// Either we, or an element we contain, has gotten focus, so we need to
// set the repeat index. This is done through the <repeat> the
// nsXFormsContextContainer belongs to.
//
// Start by finding the <repeat> (our grandparent):
// <repeat> <-- gParent
// <div>
// <contextcontainer\> <-- this
// </div>
// </repeat>
nsCOMPtr<nsIDOMNode> parent;
node->GetParentNode(getter_AddRefs(parent));
if (parent) {
nsCOMPtr<nsIDOMNode> grandParent;
parent->GetParentNode(getter_AddRefs(grandParent));
nsCOMPtr<nsIXFormsRepeatElement> repeat =
do_QueryInterface(grandParent);
nsCOMPtr<nsIXFormsRepeatItemElement> repeatItem =
do_QueryInterface(node);
if (repeat && repeatItem) {
PRInt32 position = 1;
repeatItem->GetContextPosition(&position);
// Tell <repeat> about the new index position
PRUint32 tmp = position;
repeat->SetIndex(&tmp, PR_FALSE);
}
}
}
}
return NS_OK;
}
NS_IMETHODIMP
nsXFormsContextContainer::DocumentChanged(nsIDOMDocument *aNewDocument)
{
if (mFocusListener) {
mFocusListener->Detach();
nsCOMPtr<nsIDOMEventTarget> target = do_QueryInterface(mElement);
if (target) {
target->RemoveEventListener(NS_LITERAL_STRING("focus"), mFocusListener,
PR_TRUE);
}
mFocusListener = nsnull;
}
if (aNewDocument) {
nsCOMPtr<nsIDOMEventTarget> target = do_QueryInterface(mElement);
if (target) {
mFocusListener = new nsXFormsFocusListener(this);
NS_ENSURE_TRUE(mFocusListener, NS_ERROR_OUT_OF_MEMORY);
target->AddEventListener(NS_LITERAL_STRING("focus"), mFocusListener,
PR_TRUE);
}
}
return NS_OK;
}
NS_IMETHODIMP
nsXFormsContextContainer::CloneState(nsIDOMElement *aElement)
{
nsCOMPtr<nsIXFormsContextControl> other = do_QueryInterface(aElement);
if (!other) {
NS_WARNING("CloneState called with a different type source node");
return NS_ERROR_FAILURE;
}
nsAutoString modelID;
PRInt32 position, size;
2005-01-28 22:35:28 +03:00
other->GetContext(modelID, getter_AddRefs(mBoundNode), &position, &size);
return NS_OK;
}
// nsIXFormsContextControl
NS_IMETHODIMP
nsXFormsContextContainer::SetContext(nsIDOMNode *aContextNode,
PRInt32 aContextPosition,
PRInt32 aContextSize)
{
mContextIsDirty = (mContextIsDirty ||
mBoundNode != aContextNode ||
mContextPosition != aContextPosition ||
mContextSize != aContextSize);
if (mContextIsDirty) {
mBoundNode = aContextNode;
mContextPosition = aContextPosition;
mContextSize = aContextSize;
}
return BindToModel();
}
NS_IMETHODIMP
nsXFormsContextContainer::GetContext(nsAString &aModelID,
nsIDOMNode **aContextNode,
PRInt32 *aContextPosition,
PRInt32 *aContextSize)
{
nsresult rv = nsXFormsBindableControlStub::GetContext(aModelID,
aContextNode,
aContextPosition,
aContextSize);
NS_ENSURE_SUCCESS(rv, rv);
*aContextPosition = mContextPosition;
*aContextSize = mContextSize;
return NS_OK;
}
// nsIXFormsControl
NS_IMETHODIMP
nsXFormsContextContainer::Bind(PRBool *aContextChanged)
{
NS_ENSURE_ARG(aContextChanged);
*aContextChanged = mContextIsDirty;
mContextIsDirty = PR_FALSE;
return NS_OK;
}
NS_IMETHODIMP
nsXFormsContextContainer::IsEventTarget(PRBool* aOK)
{
*aOK = PR_FALSE;
return NS_OK;
}
// nsIXFormsRepeatItemElement
/**
* @todo Should set/get pseudo-element, not attribute (XXX)
* @see http://bugzilla.mozilla.org/show_bug.cgi?id=271724
*/
NS_IMETHODIMP
nsXFormsContextContainer::SetIndexState(PRBool aHasIndex)
{
if (mElement) {
mHasIndex = aHasIndex;
NS_NAMED_LITERAL_STRING(classStr, "class");
if (aHasIndex) {
mElement->SetAttribute(classStr,
NS_LITERAL_STRING("xf-repeat-item xf-repeat-index"));
} else {
mElement->SetAttribute(classStr, NS_LITERAL_STRING("xf-repeat-item"));
}
}
return NS_OK;
}
NS_IMETHODIMP
nsXFormsContextContainer::GetIndexState(PRBool *aHasIndex)
{
NS_ENSURE_ARG(aHasIndex);
*aHasIndex = mHasIndex;
return NS_OK;
}
NS_IMETHODIMP
nsXFormsContextContainer::GetContextPosition(PRInt32 *aContextPosition)
{
*aContextPosition = mContextPosition;
return NS_OK;
}
// Factory
NS_HIDDEN_(nsresult)
NS_NewXFormsContextContainer(nsIXTFElement **aResult)
{
*aResult = new nsXFormsContextContainer();
if (!*aResult)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*aResult);
return NS_OK;
}