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gecko-dev/extensions/xforms/nsXFormsModelElement.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>
* Allan Beaufour <abeaufour@novell.com>
* Darin Fisher <darin@meer.net>
* Olli Pettay <Olli.Pettay@helsinki.fi>
*
* 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 "nsXFormsModelElement.h"
#include "nsIXTFGenericElementWrapper.h"
#include "nsMemory.h"
#include "nsIDOMElement.h"
#include "nsIDOM3Node.h"
#include "nsIDOMNodeList.h"
#include "nsString.h"
#include "nsIDocument.h"
#include "nsXFormsAtoms.h"
#include "nsINameSpaceManager.h"
#include "nsIServiceManager.h"
#include "nsINodeInfo.h"
#include "nsIDOMEvent.h"
#include "nsIDOMDOMImplementation.h"
#include "nsIDOMXMLDocument.h"
#include "nsIDOMEventReceiver.h"
#include "nsIDOMXPathResult.h"
#include "nsIXFormsXPathEvaluator.h"
#include "nsIDOMXPathNSResolver.h"
#include "nsIDOMNSXPathExpression.h"
#include "nsIScriptGlobalObject.h"
#include "nsIContent.h"
#include "nsIURL.h"
#include "nsNetUtil.h"
#include "nsIXFormsControl.h"
#include "nsXFormsTypes.h"
#include "nsXFormsXPathParser.h"
#include "nsXFormsXPathAnalyzer.h"
#include "nsIInstanceElementPrivate.h"
#include "nsXFormsUtils.h"
#include "nsXFormsSchemaValidator.h"
#include "nsIXFormsUIWidget.h"
#include "nsIAttribute.h"
#include "nsISchemaLoader.h"
#include "nsISchema.h"
#include "nsAutoPtr.h"
#include "nsArray.h"
#include "nsXFormsLazyInstanceElement.h"
#ifdef DEBUG
//#define DEBUG_MODEL
#endif
//------------------------------------------------------------------------------
// Helper function for using XPath to locate an <xsd:schema> element by
// matching its "id" attribute. This is necessary since <xsd:schema> is
// treated as an ordinary XML data node without an "ID" attribute.
static void
GetSchemaElementById(nsIDOMElement *contextNode,
const nsString &id,
nsIDOMElement **resultNode)
{
// search for an element with the given "id" attribute, and then verify
// that the element is in the XML Schema namespace.
nsAutoString expr;
expr.AssignLiteral("//*[@id=\"");
expr.Append(id);
expr.AppendLiteral("\"]");
nsCOMPtr<nsIDOMXPathResult> xpRes =
nsXFormsUtils::EvaluateXPath(expr,
contextNode,
contextNode,
nsIDOMXPathResult::FIRST_ORDERED_NODE_TYPE);
if (xpRes) {
nsCOMPtr<nsIDOMNode> node;
xpRes->GetSingleNodeValue(getter_AddRefs(node));
if (node) {
nsAutoString ns;
node->GetNamespaceURI(ns);
if (ns.EqualsLiteral(NS_NAMESPACE_XML_SCHEMA))
CallQueryInterface(node, resultNode);
}
}
}
//------------------------------------------------------------------------------
static void
DeleteVoidArray(void *aObject,
nsIAtom *aPropertyName,
void *aPropertyValue,
void *aData)
{
delete NS_STATIC_CAST(nsVoidArray *, aPropertyValue);
}
static nsresult
AddToModelList(nsIDOMDocument *domDoc, nsXFormsModelElement *model)
{
nsCOMPtr<nsIDocument> doc = do_QueryInterface(domDoc);
nsVoidArray *models =
NS_STATIC_CAST(nsVoidArray *,
doc->GetProperty(nsXFormsAtoms::modelListProperty));
if (!models) {
models = new nsVoidArray(16);
if (!models)
return NS_ERROR_OUT_OF_MEMORY;
doc->SetProperty(nsXFormsAtoms::modelListProperty, models, DeleteVoidArray);
}
models->AppendElement(model);
return NS_OK;
}
static void
RemoveFromModelList(nsIDOMDocument *domDoc, nsXFormsModelElement *model)
{
nsCOMPtr<nsIDocument> doc = do_QueryInterface(domDoc);
nsVoidArray *models =
NS_STATIC_CAST(nsVoidArray *,
doc->GetProperty(nsXFormsAtoms::modelListProperty));
if (models)
models->RemoveElement(model);
}
static const nsVoidArray *
GetModelList(nsIDOMDocument *domDoc)
{
nsCOMPtr<nsIDocument> doc = do_QueryInterface(domDoc);
return NS_STATIC_CAST(nsVoidArray *,
doc->GetProperty(nsXFormsAtoms::modelListProperty));
}
//------------------------------------------------------------------------------
static const nsIID sScriptingIIDs[] = {
NS_IDOMELEMENT_IID,
NS_IDOMEVENTTARGET_IID,
NS_IDOM3NODE_IID,
NS_IXFORMSMODELELEMENT_IID
};
static nsIAtom* sModelPropsList[eModel__count];
// This can be nsVoidArray because elements will remove
// themselves from the list if they are deleted during refresh.
static nsVoidArray* sPostRefreshList = nsnull;
static PRInt32 sRefreshing = 0;
nsPostRefresh::nsPostRefresh()
{
#ifdef DEBUG_smaug
printf("nsPostRefresh\n");
#endif
++sRefreshing;
}
nsPostRefresh::~nsPostRefresh()
{
#ifdef DEBUG_smaug
printf("~nsPostRefresh\n");
#endif
--sRefreshing;
if (sPostRefreshList && !sRefreshing) {
while (sPostRefreshList->Count()) {
// Iterating this way because refresh can lead to
// additions/deletions in sPostRefreshList.
// Iterating from last to first saves possibly few memcopies,
// see nsVoidArray::RemoveElementsAt().
PRInt32 last = sPostRefreshList->Count() - 1;
nsIXFormsControl* control =
NS_STATIC_CAST(nsIXFormsControl*, sPostRefreshList->ElementAt(last));
sPostRefreshList->RemoveElementAt(last);
if (control)
control->Refresh();
}
delete sPostRefreshList;
sPostRefreshList = nsnull;
}
}
nsresult
nsXFormsModelElement::NeedsPostRefresh(nsIXFormsControl* aControl)
{
if (sRefreshing) {
if (!sPostRefreshList) {
sPostRefreshList = new nsVoidArray();
NS_ENSURE_TRUE(sPostRefreshList, NS_ERROR_OUT_OF_MEMORY);
}
if (sPostRefreshList->IndexOf(aControl) < 0) {
sPostRefreshList->AppendElement(aControl);
}
} else {
// We are not refreshing any models, so the control
// can be refreshed immediately.
aControl->Refresh();
}
return NS_OK;
}
void
nsXFormsModelElement::CancelPostRefresh(nsIXFormsControl* aControl)
{
if (sPostRefreshList)
sPostRefreshList->RemoveElement(aControl);
}
nsXFormsModelElement::nsXFormsModelElement()
: mElement(nsnull),
mSchemaCount(0),
mSchemaTotal(0),
mPendingInstanceCount(0),
mDocumentLoaded(PR_FALSE),
mNeedsRefresh(PR_FALSE),
mInstanceList(16),
mLazyModel(PR_FALSE)
{
}
NS_IMPL_ISUPPORTS_INHERITED6(nsXFormsModelElement,
nsXFormsStubElement,
nsIXFormsModelElement,
nsIModelElementPrivate,
nsISchemaLoadListener,
nsIWebServiceErrorHandler,
nsIDOMEventListener,
nsIXFormsContextControl)
NS_IMETHODIMP
nsXFormsModelElement::OnDestroyed()
{
RemoveModelFromDocument();
mElement = nsnull;
mSchemas = nsnull;
mInstanceList.Clear();
return NS_OK;
}
void
nsXFormsModelElement::RemoveModelFromDocument()
{
mDocumentLoaded = PR_FALSE;
nsCOMPtr<nsIDOMDocument> domDoc;
mElement->GetOwnerDocument(getter_AddRefs(domDoc));
if (!domDoc)
return;
RemoveFromModelList(domDoc, this);
nsCOMPtr<nsIDOMEventTarget> targ = do_QueryInterface(domDoc);
if (targ)
targ->RemoveEventListener(NS_LITERAL_STRING("DOMContentLoaded"), this, PR_TRUE);
}
NS_IMETHODIMP
nsXFormsModelElement::GetScriptingInterfaces(PRUint32 *aCount, nsIID ***aArray)
{
return nsXFormsUtils::CloneScriptingInterfaces(sScriptingIIDs,
NS_ARRAY_LENGTH(sScriptingIIDs),
aCount, aArray);
}
NS_IMETHODIMP
nsXFormsModelElement::WillChangeDocument(nsIDOMDocument* aNewDocument)
{
RemoveModelFromDocument();
if(!aNewDocument) {
// can't send this much later or the model won't still be in the document!
nsXFormsUtils::DispatchEvent(mElement, eEvent_ModelDestruct);
}
return NS_OK;
}
NS_IMETHODIMP
nsXFormsModelElement::DocumentChanged(nsIDOMDocument* aNewDocument)
{
if (!aNewDocument)
return NS_OK;
AddToModelList(aNewDocument, this);
nsCOMPtr<nsIDOMEventTarget> targ = do_QueryInterface(aNewDocument);
if (targ)
targ->AddEventListener(NS_LITERAL_STRING("DOMContentLoaded"), this, PR_TRUE);
return NS_OK;
}
NS_IMETHODIMP
nsXFormsModelElement::DoneAddingChildren()
{
// (XForms 4.2.1)
// 1. load xml schemas
nsAutoString schemaList;
mElement->GetAttribute(NS_LITERAL_STRING("schema"), schemaList);
if (!schemaList.IsEmpty()) {
NS_ENSURE_TRUE(mSchemas, NS_ERROR_FAILURE);
// Parse the whitespace-separated list.
nsCOMPtr<nsIContent> content = do_QueryInterface(mElement);
nsRefPtr<nsIURI> baseURI = content->GetBaseURI();
nsCStringArray schemas;
schemas.ParseString(NS_ConvertUTF16toUTF8(schemaList).get(), " \t\r\n");
// Increase by 1 to prevent OnLoad from calling FinishConstruction
mSchemaTotal = schemas.Count();
for (PRInt32 i=0; i<mSchemaTotal; ++i) {
nsresult rv = NS_OK;
nsCOMPtr<nsIURI> newURI;
NS_NewURI(getter_AddRefs(newURI), *schemas[i], nsnull, baseURI);
nsCOMPtr<nsIURL> newURL = do_QueryInterface(newURI);
if (!newURL) {
rv = NS_ERROR_UNEXPECTED;
} else {
// This code is copied from nsXMLEventsManager for extracting an
// element ID from an xsd:anyURI link.
nsCAutoString ref;
newURL->GetRef(ref);
newURL->SetRef(EmptyCString());
PRBool equals = PR_FALSE;
newURL->Equals(baseURI, &equals);
if (equals) {
// We will not be able to locate the <xsd:schema> element using the
// getElementById function defined on our document when <xsd:schema>
// is treated as an ordinary XML data node. So, we employ XPath to
// locate it for us.
NS_ConvertUTF8toUTF16 id(ref);
nsCOMPtr<nsIDOMElement> el;
GetSchemaElementById(mElement, id, getter_AddRefs(el));
if (!el) {
// Perhaps the <xsd:schema> element appears after the <xforms:model>
// element in the document, so we'll defer loading it until the
// document has finished loading.
mPendingInlineSchemas.AppendString(id);
} else {
nsCOMPtr<nsISchema> schema;
// no need to observe errors via the callback. instead, rely on
// this method returning a failure code when it encounters errors.
rv = mSchemas->ProcessSchemaElement(el, nsnull,
getter_AddRefs(schema));
if (NS_SUCCEEDED(rv))
mSchemaCount++;
}
} else {
nsCAutoString uriSpec;
newURI->GetSpec(uriSpec);
rv = mSchemas->LoadAsync(NS_ConvertUTF8toUTF16(uriSpec), this);
}
}
if (NS_FAILED(rv)) {
// this is a fatal error (XXX)
nsXFormsUtils::ReportError(NS_LITERAL_STRING("schemaLoadError"), mElement);
nsXFormsUtils::DispatchEvent(mElement, eEvent_LinkException);
return NS_OK;
}
}
}
// If all of the children are added and there aren't any instance elements,
// yet, then we need to make sure that one is ready in case the form author
// is using lazy authoring.
PRUint32 instCount = mInstanceList.Count();
if (!instCount) {
nsCOMPtr<nsIDOMDocument> domDoc;
mElement->GetOwnerDocument(getter_AddRefs(domDoc));
if (domDoc) {
nsXFormsLazyInstanceElement *lazyInstance =
new nsXFormsLazyInstanceElement();
lazyInstance->CreateLazyInstanceDocument(domDoc);
AddInstanceElement(lazyInstance);
mLazyModel = PR_TRUE;
}
}
// 2. construct an XPath data model from inline or external initial instance
// data. This is done by our child instance elements as they are inserted
// into the document, and all of the instances will be processed by this
// point.
// schema and external instance data loads should delay document onload
if (IsComplete()) {
// No need to fire refresh event if we assume that all UI controls
// appear later in the document.
NS_ASSERTION(!mDocumentLoaded, "document should not be loaded yet");
return FinishConstruction();
}
return NS_OK;
}
NS_IMETHODIMP
nsXFormsModelElement::HandleDefault(nsIDOMEvent *aEvent, PRBool *aHandled)
{
if (!nsXFormsUtils::EventHandlingAllowed(aEvent, mElement))
return NS_OK;
*aHandled = PR_TRUE;
nsAutoString type;
aEvent->GetType(type);
nsresult rv = NS_OK;
if (type.EqualsASCII(sXFormsEventsEntries[eEvent_Refresh].name)) {
rv = Refresh();
} else if (type.EqualsASCII(sXFormsEventsEntries[eEvent_Revalidate].name)) {
rv = Revalidate();
} else if (type.EqualsASCII(sXFormsEventsEntries[eEvent_Recalculate].name)) {
rv = Recalculate();
} else if (type.EqualsASCII(sXFormsEventsEntries[eEvent_Rebuild].name)) {
rv = Rebuild();
} else if (type.EqualsASCII(sXFormsEventsEntries[eEvent_ModelConstructDone].name)) {
rv = ConstructDone();
} else if (type.EqualsASCII(sXFormsEventsEntries[eEvent_Ready].name)) {
Ready();
} else if (type.EqualsASCII(sXFormsEventsEntries[eEvent_Reset].name)) {
Reset();
} else {
*aHandled = PR_FALSE;
}
#ifdef DEBUG
if (NS_FAILED(rv))
printf("nsXFormsModelElement::HandleDefault() failed!\n");
#endif
return rv;
}
nsresult
nsXFormsModelElement::ConstructDone()
{
nsresult rv = InitializeControls();
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
NS_IMETHODIMP
nsXFormsModelElement::OnCreated(nsIXTFGenericElementWrapper *aWrapper)
{
aWrapper->SetNotificationMask(nsIXTFElement::NOTIFY_WILL_CHANGE_DOCUMENT |
nsIXTFElement::NOTIFY_DOCUMENT_CHANGED |
nsIXTFElement::NOTIFY_DONE_ADDING_CHILDREN |
nsIXTFElement::NOTIFY_HANDLE_DEFAULT);
nsCOMPtr<nsIDOMElement> node;
aWrapper->GetElementNode(getter_AddRefs(node));
// It's ok to keep a weak 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");
nsresult rv = mMDG.Init(this);
NS_ENSURE_SUCCESS(rv, rv);
mSchemas = do_GetService(NS_SCHEMALOADER_CONTRACTID);
return NS_OK;
}
// nsIXFormsModelElement
NS_IMETHODIMP
nsXFormsModelElement::GetInstanceDocument(const nsAString& aInstanceID,
nsIDOMDocument **aDocument)
{
NS_ENSURE_ARG_POINTER(aDocument);
*aDocument = FindInstanceDocument(aInstanceID).get(); // transfer reference
return *aDocument ? NS_OK : NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsXFormsModelElement::Rebuild()
{
#ifdef DEBUG
printf("nsXFormsModelElement::Rebuild()\n");
#endif
// TODO: Clear graph and re-attach elements
mControlsNeedingRefresh.Clear();
// 1 . Clear graph
nsresult rv;
rv = mMDG.Clear();
NS_ENSURE_SUCCESS(rv, rv);
// 2. Re-attach all elements
if (mDocumentLoaded) { // if it's not during initializing phase
// Copy the form control list as it stands right now.
nsVoidArray *oldFormList = new nsVoidArray();
NS_ENSURE_TRUE(oldFormList, NS_ERROR_OUT_OF_MEMORY);
*oldFormList = mFormControls;
// Clear out mFormControls so that we can rebuild the list. We'll go control
// by control over the old list and rebind the controls.
mFormControls.Clear(); // if this happens on a documentchange
PRInt32 controlCount = oldFormList->Count();
for (PRInt32 i = 0; i < controlCount; ++i) {
nsIXFormsControl* control = NS_STATIC_CAST(nsIXFormsControl*,
(*oldFormList)[i]);
/// @todo If a control is removed because of previous control has been
/// refreshed, we do, obviously, not need to refresh it. So mFormControls
/// should have weak bindings to the controls I guess? (XXX)
///
/// This could happen for \<repeatitem\>s for example.
if (!control) {
continue;
}
// run bind to reset mBoundNode for all of these controls and also, in the
// process, they will be added to the model that they should be bound to.
control->Bind();
}
delete oldFormList;
// Triggers a refresh of all controls
mNeedsRefresh = PR_TRUE;
}
// 3. Rebuild graph
rv = ProcessBindElements();
NS_ENSURE_SUCCESS(rv, rv);
return mMDG.Rebuild();
}
NS_IMETHODIMP
nsXFormsModelElement::Recalculate()
{
#ifdef DEBUG
printf("nsXFormsModelElement::Recalculate()\n");
#endif
return mMDG.Recalculate(&mChangedNodes);
}
void
nsXFormsModelElement::SetSingleState(nsIDOMElement *aElement,
PRBool aState,
nsXFormsEvent aOnEvent,
PRUint32 aAttributePos)
{
nsXFormsEvent event = aState ? aOnEvent : (nsXFormsEvent) (aOnEvent + 1);
// Set pseudo class
///
/// @bug Set via attributes right now. Bug 271720. (XXX)
aElement->SetAttribute(kStateAttributes[aState ? aAttributePos : aAttributePos + 1],
NS_LITERAL_STRING("1"));
aElement->RemoveAttribute(kStateAttributes[aState ? aAttributePos + 1 : aAttributePos]);
// Dispatch event
nsXFormsUtils::DispatchEvent(aElement, event);
}
nsresult
nsXFormsModelElement::SetStatesInternal(nsIXFormsControl *aControl,
nsIDOMNode *aNode,
PRBool aAllStates)
{
NS_ENSURE_ARG(aControl);
if (!aNode)
return NS_OK;
nsCOMPtr<nsIDOMElement> element;
aControl->GetElement(getter_AddRefs(element));
NS_ENSURE_STATE(element);
const nsXFormsNodeState *ns = mMDG.GetNodeState(aNode);
NS_ENSURE_STATE(ns);
/// @todo the last argument (0, 2, 4, and 6) to SetSingleState is the
/// position of the attribute in kStateAttributes. It's hacky and only
/// temporary, until bug 271720 lands. (XXX)
if (aAllStates || ns->ShouldDispatchValid()) {
SetSingleState(element, ns->IsValid(), eEvent_Valid, 0);
}
if (aAllStates || ns->ShouldDispatchReadonly()) {
SetSingleState(element, ns->IsReadonly(), eEvent_Readonly, 2);
}
if (aAllStates || ns->ShouldDispatchRequired()) {
SetSingleState(element, ns->IsRequired(), eEvent_Required, 4);
}
if (aAllStates || ns->ShouldDispatchRelevant()) {
SetSingleState(element, ns->IsRelevant(), eEvent_Enabled, 6);
}
if (ns->ShouldDispatchValueChanged()) {
nsXFormsUtils::DispatchEvent(element, eEvent_ValueChanged);
}
return NS_OK;
}
NS_IMETHODIMP
nsXFormsModelElement::Revalidate()
{
#ifdef DEBUG
printf("nsXFormsModelElement::Revalidate()\n");
#endif
#ifdef DEBUG_MODEL
printf("[%s] Changed nodes:\n", __TIME__);
for (PRInt32 j = 0; j < mChangedNodes.Count(); ++j) {
nsCOMPtr<nsIDOMNode> node = mChangedNodes[j];
nsAutoString name;
node->GetNodeName(name);
printf("\t%s [%p]\n",
NS_ConvertUCS2toUTF8(name).get(),
(void*) node);
}
#endif
// Revalidate nodes
mMDG.Revalidate(&mChangedNodes);
// Iterate over all form controls if not during initialization phase (then
// this is handled in InitializeControls())
if (mDocumentLoaded) {
PRInt32 controlCount = mFormControls.Count();
for (PRInt32 i = 0; i < controlCount; ++i) {
nsIXFormsControl* control = NS_STATIC_CAST(nsIXFormsControl*, mFormControls[i]);
/// @todo If a control is removed because of previous control has been
/// refreshed, we do, obviously, not need to refresh it. So mFormControls
/// should have weak bindings to the controls I guess? (XXX)
///
/// This could happen for \<repeatitem\>s for example.
if (!control) {
continue;
}
// Get bound node
nsCOMPtr<nsIDOMNode> boundNode;
control->GetBoundNode(getter_AddRefs(boundNode));
PRBool rebind = PR_FALSE;
PRBool refresh = PR_FALSE;
if (mNeedsRefresh) {
refresh = PR_TRUE;
} else {
// Get dependencies
nsCOMArray<nsIDOMNode> *deps = nsnull;
control->GetDependencies(&deps);
#ifdef DEBUG_MODEL
PRUint32 depCount = deps ? deps->Count() : 0;
nsCOMPtr<nsIDOMElement> controlElement;
control->GetElement(getter_AddRefs(controlElement));
if (controlElement) {
printf("Checking control: ");
//DBG_TAGINFO(controlElement);
nsAutoString boundName;
if (boundNode)
boundNode->GetNodeName(boundName);
printf("\tDependencies: %d, Bound to: '%s' [%p]\n",
depCount,
NS_ConvertUCS2toUTF8(boundName).get(),
(void*) boundNode);
nsAutoString depNodeName;
for (PRUint32 t = 0; t < depCount; ++t) {
nsCOMPtr<nsIDOMNode> tmpdep = deps->ObjectAt(t);
if (tmpdep) {
tmpdep->GetNodeName(depNodeName);
printf("\t\t%s [%p]\n",
NS_ConvertUCS2toUTF8(depNodeName).get(),
(void*) tmpdep);
}
}
}
#endif
nsCOMPtr<nsIDOM3Node> curChanged;
for (PRInt32 j = 0; j < mChangedNodes.Count(); ++j) {
curChanged = do_QueryInterface(mChangedNodes[j]);
// Check whether the bound node is dirty. If so, we need to refresh the
// control (get updated node value from the bound node)
if (!refresh && boundNode) {
curChanged->IsSameNode(boundNode, &refresh);
if (refresh)
// We need to refresh the control. We cannot break out of the loop
// as we need to check dependencies
continue;
}
// Check whether any dependencies are dirty. If so, we need to rebind
// the control (re-evaluate it's binding expression)
for (PRInt32 k = 0; k < deps->Count(); ++k) {
/// @note beaufour: I'm not to happy about this ...
/// O(mChangedNodes.Count() * deps->Count()), but using the pointers
/// for sorting and comparing does not work...
curChanged->IsSameNode(deps->ObjectAt(k), &rebind);
if (rebind)
// We need to rebind the control, no need to check any more
break;
}
}
#ifdef DEBUG_MODEL
printf("\trebind: %d, refresh: %d\n", rebind, refresh);
#endif
}
if (rebind) {
control->Bind();
control->GetBoundNode(getter_AddRefs(boundNode));
}
if (rebind || refresh) {
nsresult rv = SetStatesInternal(control, boundNode);
NS_ENSURE_SUCCESS(rv, rv);
if (mControlsNeedingRefresh.IndexOf(control) == -1)
mControlsNeedingRefresh.AppendElement(control);
}
}
mChangedNodes.Clear();
mNeedsRefresh = PR_FALSE;
}
mMDG.ClearDispatchFlags();
return NS_OK;
}
NS_IMETHODIMP
nsXFormsModelElement::Refresh()
{
#ifdef DEBUG
printf("nsXFormsModelElement::Refresh()\n");
#endif
nsPostRefresh postRefresh = nsPostRefresh();
if (mDocumentLoaded) { // if not during initialization phase
PRInt32 controlCount = mControlsNeedingRefresh.Count();
for (PRInt32 i = 0; i < controlCount; ++i) {
nsIXFormsControl* control = NS_STATIC_CAST(nsIXFormsControl*,
mControlsNeedingRefresh[i]);
if (control)
control->Refresh();
}
mControlsNeedingRefresh.Clear();
}
return NS_OK;
}
// nsISchemaLoadListener
NS_IMETHODIMP
nsXFormsModelElement::OnLoad(nsISchema* aSchema)
{
mSchemaCount++;
if (IsComplete()) {
nsresult rv = FinishConstruction();
NS_ENSURE_SUCCESS(rv, rv);
nsXFormsUtils::DispatchEvent(mElement, eEvent_Refresh);
MaybeNotifyCompletion();
}
return NS_OK;
}
// nsIWebServiceErrorHandler
NS_IMETHODIMP
nsXFormsModelElement::OnError(nsresult aStatus,
const nsAString &aStatusMessage)
{
nsXFormsUtils::ReportError(NS_LITERAL_STRING("schemaLoadError"), mElement);
nsXFormsUtils::DispatchEvent(mElement, eEvent_LinkException);
return NS_OK;
}
// nsIDOMEventListener
NS_IMETHODIMP
nsXFormsModelElement::HandleEvent(nsIDOMEvent* aEvent)
{
if (!nsXFormsUtils::EventHandlingAllowed(aEvent, mElement))
return NS_OK;
nsAutoString type;
aEvent->GetType(type);
if (!type.EqualsLiteral("DOMContentLoaded"))
return NS_OK;
mDocumentLoaded = PR_TRUE;
// dispatch xforms-model-construct, xforms-rebuild, xforms-recalculate,
// xforms-revalidate
// We wait until DOMContentLoaded to dispatch xforms-model-construct,
// since the model may have an action handler for this event and Mozilla
// doesn't register XML Event listeners until the document is loaded.
// xforms-model-construct is not cancellable, so always proceed.
nsXFormsUtils::DispatchEvent(mElement, eEvent_ModelConstruct);
nsXFormsUtils::DispatchEvent(mElement, eEvent_Rebuild);
nsXFormsUtils::DispatchEvent(mElement, eEvent_Recalculate);
nsXFormsUtils::DispatchEvent(mElement, eEvent_Revalidate);
if (mPendingInlineSchemas.Count() > 0) {
nsCOMPtr<nsIDOMElement> el;
nsresult rv;
for (PRInt32 i=0; i<mPendingInlineSchemas.Count(); ++i) {
GetSchemaElementById(mElement, *mPendingInlineSchemas[i],
getter_AddRefs(el));
if (!el) {
rv = NS_ERROR_UNEXPECTED;
} else {
nsCOMPtr<nsISchema> schema;
// no need to observe errors via the callback. instead, rely on
// this method returning a failure code when it encounters errors.
rv = mSchemas->ProcessSchemaElement(el, nsnull,
getter_AddRefs(schema));
if (NS_SUCCEEDED(rv))
mSchemaCount++;
}
if (NS_FAILED(rv)) {
// this is a fatal error (XXX)
nsXFormsUtils::ReportError(NS_LITERAL_STRING("schemaLoadError"), mElement);
nsXFormsUtils::DispatchEvent(mElement, eEvent_LinkException);
return NS_OK;
}
}
if (IsComplete()) {
rv = FinishConstruction();
NS_ENSURE_SUCCESS(rv, rv);
nsXFormsUtils::DispatchEvent(mElement, eEvent_Refresh);
}
mPendingInlineSchemas.Clear();
}
// We may still be waiting on external documents to load.
MaybeNotifyCompletion();
return NS_OK;
}
// nsIModelElementPrivate
NS_IMETHODIMP
nsXFormsModelElement::AddFormControl(nsIXFormsControl *aControl)
{
if (mFormControls.IndexOf(aControl) == -1)
mFormControls.AppendElement(aControl);
return NS_OK;
}
NS_IMETHODIMP
nsXFormsModelElement::RemoveFormControl(nsIXFormsControl *aControl)
{
mFormControls.RemoveElement(aControl);
mControlsNeedingRefresh.RemoveElement(aControl);
return NS_OK;
}
NS_IMETHODIMP
nsXFormsModelElement::GetTypeForControl(nsIXFormsControl *aControl,
nsISchemaType **aType)
{
NS_ENSURE_ARG_POINTER(aType);
*aType = nsnull;
nsCOMPtr<nsIDOMNode> boundNode;
aControl->GetBoundNode(getter_AddRefs(boundNode));
if (!boundNode) {
// if the control isn't bound to instance data, it doesn't make sense to
// return a type. It is perfectly valid for there to be no bound node,
// so no need to use an NS_ENSURE_xxx macro, either.
return NS_ERROR_FAILURE;
}
nsAutoString schemaTypeName, schemaTypeNamespace;
nsresult rv = GetTypeAndNSFromNode(boundNode, schemaTypeName,
schemaTypeNamespace);
NS_ENSURE_SUCCESS(rv, rv);
nsXFormsSchemaValidator validator;
nsCOMPtr<nsISchemaCollection> schemaColl = do_QueryInterface(mSchemas);
if (schemaColl) {
nsCOMPtr<nsISchema> schema;
schemaColl->GetSchema(schemaTypeNamespace, getter_AddRefs(schema));
// if no schema found, then we will only handle built-in types.
if (schema)
validator.LoadSchema(schema);
}
return validator.GetType(schemaTypeName, schemaTypeNamespace, aType);
}
/* static */ nsresult
nsXFormsModelElement::GetTypeAndNSFromNode(nsIDOMNode *aInstanceData,
nsAString &aType, nsAString &aNSUri)
{
nsAutoString schemaTypePrefix;
nsresult rv = nsXFormsUtils::ParseTypeFromNode(aInstanceData, aType,
schemaTypePrefix);
if(rv == NS_ERROR_NOT_AVAILABLE) {
// if there is no type assigned, then assume that the type is 'string'
aNSUri.Assign(NS_LITERAL_STRING(NS_NAMESPACE_XML_SCHEMA));
aType.Assign(NS_LITERAL_STRING("string"));
rv = NS_OK;
} else {
if (schemaTypePrefix.IsEmpty()) {
aNSUri.AssignLiteral("");
} else {
// get the namespace url from the prefix
nsCOMPtr<nsIDOM3Node> domNode3 = do_QueryInterface(mElement, &rv);
NS_ENSURE_SUCCESS(rv, rv);
rv = domNode3->LookupNamespaceURI(schemaTypePrefix, aNSUri);
}
}
return rv;
}
NS_IMETHODIMP
nsXFormsModelElement::InstanceLoadStarted()
{
++mPendingInstanceCount;
return NS_OK;
}
NS_IMETHODIMP
nsXFormsModelElement::InstanceLoadFinished(PRBool aSuccess)
{
--mPendingInstanceCount;
if (!aSuccess) {
nsXFormsUtils::ReportError(NS_LITERAL_STRING("instanceLoadError"), mElement);
nsXFormsUtils::DispatchEvent(mElement, eEvent_LinkException);
} else if (IsComplete()) {
nsresult rv = FinishConstruction();
if (NS_SUCCEEDED(rv)) {
nsXFormsUtils::DispatchEvent(mElement, eEvent_Refresh);
MaybeNotifyCompletion();
}
}
return NS_OK;
}
NS_IMETHODIMP
nsXFormsModelElement::FindInstanceElement(const nsAString &aID,
nsIInstanceElementPrivate **aElement)
{
*aElement = nsnull;
PRUint32 instCount = mInstanceList.Count();
if (instCount) {
nsCOMPtr<nsIDOMElement> element;
nsAutoString id;
for (PRUint32 i = 0; i < instCount; ++i) {
nsIInstanceElementPrivate* instEle = mInstanceList.ObjectAt(i);
instEle->GetElement(getter_AddRefs(element));
if (aID.IsEmpty()) {
NS_ADDREF(instEle);
*aElement = instEle;
break;
} else if (!element) {
// this should only happen if the instance on the list is lazy authored
// and as far as I can tell, a lazy authored instance should be the
// first (and only) instance in the model and unable to have an ID.
// But that isn't clear to me reading the spec, so for now
// we'll play it safe in case the WG more clearly defines lazy authoring
// in the future.
continue;
}
element->GetAttribute(NS_LITERAL_STRING("id"), id);
if (aID.Equals(id)) {
NS_ADDREF(instEle);
*aElement = instEle;
break;
}
}
}
return NS_OK;
}
NS_IMETHODIMP
nsXFormsModelElement::SetNodeValue(nsIDOMNode *aContextNode,
const nsAString &aNodeValue,
PRBool *aNodeChanged)
{
return mMDG.SetNodeValue(aContextNode,
aNodeValue,
aNodeChanged);
}
NS_IMETHODIMP
nsXFormsModelElement::GetNodeValue(nsIDOMNode *aContextNode,
nsAString &aNodeValue)
{
return mMDG.GetNodeValue(aContextNode,
aNodeValue);
}
NS_IMETHODIMP
nsXFormsModelElement::ValidateNode(nsIDOMNode *aInstanceNode, PRBool *aResult)
{
NS_ENSURE_ARG_POINTER(aResult);
nsAutoString schemaTypeName, schemaTypeNamespace;
nsresult rv = GetTypeAndNSFromNode(aInstanceNode, schemaTypeName,
schemaTypeNamespace);
NS_ENSURE_SUCCESS(rv, rv);
nsXFormsSchemaValidator validator;
nsCOMPtr<nsISchemaCollection> schemaColl = do_QueryInterface(mSchemas);
if (schemaColl) {
nsCOMPtr<nsISchema> schema;
schemaColl->GetSchema(schemaTypeNamespace, getter_AddRefs(schema));
// if no schema found, then we will only handle built-in types.
if (schema)
validator.LoadSchema(schema);
}
nsAutoString value;
nsXFormsUtils::GetNodeValue(aInstanceNode, value);
PRBool isValid = validator.ValidateString(value, schemaTypeName, schemaTypeNamespace);
*aResult = isValid;
return NS_OK;
}
/*
* SUBMIT_SERIALIZE_NODE - node is to be serialized
* SUBMIT_SKIP_NODE - node is not to be serialized
* SUBMIT_ABORT_SUBMISSION - abort submission (invalid node or empty required node)
*/
NS_IMETHODIMP
nsXFormsModelElement::HandleInstanceDataNode(nsIDOMNode *aInstanceDataNode, unsigned short *aResult)
{
// abort by default
*aResult = SUBMIT_ABORT_SUBMISSION;
const nsXFormsNodeState* ns;
ns = mMDG.GetNodeState(aInstanceDataNode);
NS_ENSURE_STATE(ns);
if (!ns->IsRelevant()) {
// not relevant, thus skip
*aResult = SUBMIT_SKIP_NODE;
} else if (ns->IsRequired()) {
// required and has a value, continue
nsAutoString value;
nsXFormsUtils::GetNodeValue(aInstanceDataNode, value);
if (!value.IsEmpty() && ns->IsValid())
*aResult = SUBMIT_SERIALIZE_NODE;
} else if (ns->IsValid()) {
// valid
*aResult = SUBMIT_SERIALIZE_NODE;
}
return NS_OK;
}
// nsIXFormsContextControl
NS_IMETHODIMP
nsXFormsModelElement::SetContext(nsIDOMNode *aContextNode,
PRInt32 aContextPosition,
PRInt32 aContextSize)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsXFormsModelElement::GetContext(nsAString &aModelID,
nsIDOMNode **aContextNode,
PRInt32 *aContextPosition,
PRInt32 *aContextSize)
{
// Adding the nsIXFormsContextControl interface to model to allow
// submission elements to call our binding evaluation methods, like
// EvaluateNodeBinding. If GetContext can get called outside of the binding
// codepath, then this MIGHT lead to problems.
NS_ENSURE_ARG(aContextSize);
NS_ENSURE_ARG(aContextPosition);
*aContextNode = nsnull;
// better get the stuff most likely to fail out of the way first. No sense
// changing the other values that we are returning unless this is successful.
nsresult rv = NS_ERROR_FAILURE;
// Anybody (like a submission element) asking a model element for its context
// for XPath expressions will want the root node of the default instance
// document
nsCOMPtr<nsIDOMDocument> firstInstanceDoc =
FindInstanceDocument(EmptyString());
NS_ENSURE_TRUE(firstInstanceDoc, rv);
nsCOMPtr<nsIDOMElement> firstInstanceRoot;
rv = firstInstanceDoc->GetDocumentElement(getter_AddRefs(firstInstanceRoot));
NS_ENSURE_TRUE(firstInstanceRoot, rv);
nsCOMPtr<nsIDOMNode>rootNode = do_QueryInterface(firstInstanceRoot);
rootNode.swap(*aContextNode);
// found the context, so can finish up assinging the rest of the values that
// we are returning
*aContextPosition = 1;
*aContextSize = 1;
nsAutoString id;
mElement->GetAttribute(NS_LITERAL_STRING("id"), id);
aModelID.Assign(id);
return NS_OK;
}
NS_IMETHODIMP
nsXFormsModelElement::GetLazyAuthored(PRBool *aLazyInstance)
{
*aLazyInstance = mLazyModel;
return NS_OK;
}
// internal methods
already_AddRefed<nsIDOMDocument>
nsXFormsModelElement::FindInstanceDocument(const nsAString &aID)
{
nsCOMPtr<nsIInstanceElementPrivate> instance;
nsXFormsModelElement::FindInstanceElement(aID, getter_AddRefs(instance));
nsIDOMDocument *doc = nsnull;
if (instance)
instance->GetDocument(&doc); // addrefs
return doc;
}
nsresult
nsXFormsModelElement::ProcessBindElements()
{
// ProcessBindElements() will go through each xforms:bind element in
// document order and apply all of the Model Item Properties to the
// instance items in the nodeset. This information will also be entered
// in the Master Dependency Graph. Most of this work is done in the
// ProcessBind() method.
nsCOMPtr<nsIDOMDocument> firstInstanceDoc =
FindInstanceDocument(EmptyString());
if (!firstInstanceDoc)
return NS_OK;
nsCOMPtr<nsIDOMElement> firstInstanceRoot;
firstInstanceDoc->GetDocumentElement(getter_AddRefs(firstInstanceRoot));
nsresult rv;
nsCOMPtr<nsIXFormsXPathEvaluator> xpath =
do_CreateInstance("@mozilla.org/dom/xforms-xpath-evaluator;1", &rv);
NS_ENSURE_TRUE(xpath, rv);
nsCOMPtr<nsIDOMNodeList> children;
mElement->GetChildNodes(getter_AddRefs(children));
PRUint32 childCount = 0;
if (children)
children->GetLength(&childCount);
nsAutoString namespaceURI, localName;
for (PRUint32 i = 0; i < childCount; ++i) {
nsCOMPtr<nsIDOMNode> child;
children->Item(i, getter_AddRefs(child));
NS_ASSERTION(child, "there can't be null items in the NodeList!");
child->GetLocalName(localName);
if (localName.EqualsLiteral("bind")) {
child->GetNamespaceURI(namespaceURI);
if (namespaceURI.EqualsLiteral(NS_NAMESPACE_XFORMS)) {
rv = ProcessBind(xpath, firstInstanceRoot, 1, 1,
nsCOMPtr<nsIDOMElement>(do_QueryInterface(child)));
if (NS_FAILED(rv)) {
return NS_OK;
}
}
}
}
return NS_OK;
}
void
nsXFormsModelElement::Reset()
{
BackupOrRestoreInstanceData(PR_TRUE);
nsXFormsUtils::DispatchEvent(mElement, eEvent_Rebuild);
nsXFormsUtils::DispatchEvent(mElement, eEvent_Recalculate);
nsXFormsUtils::DispatchEvent(mElement, eEvent_Revalidate);
nsXFormsUtils::DispatchEvent(mElement, eEvent_Refresh);
}
void
nsXFormsModelElement::Ready()
{
BackupOrRestoreInstanceData(PR_FALSE);
}
// This function will restore all of the model's instance data to it's original
// state if the supplied boolean is PR_TRUE. If it is PR_FALSE, this function
// will cause this model's instance data to be backed up.
void
nsXFormsModelElement::BackupOrRestoreInstanceData(PRBool restore)
{
PRUint32 instCount = mInstanceList.Count();
if (instCount) {
for (PRUint32 i = 0; i < instCount; ++i) {
nsIInstanceElementPrivate *instance = mInstanceList.ObjectAt(i);
// Don't know what to do with error if we get one.
// Restore/BackupOriginalDocument will already output warnings.
if(restore) {
instance->RestoreOriginalDocument();
}
else {
instance->BackupOriginalDocument();
}
}
}
}
nsresult
nsXFormsModelElement::FinishConstruction()
{
// process inline schemas that aren't referenced via the schema attribute
nsCOMPtr<nsIDOMNodeList> children;
mElement->GetChildNodes(getter_AddRefs(children));
if (children) {
PRUint32 childCount = 0;
children->GetLength(&childCount);
nsCOMPtr<nsIDOMNode> node;
nsCOMPtr<nsIDOMElement> element;
nsAutoString nsURI, localName, targetNamespace;
for (PRUint32 i = 0; i < childCount; ++i) {
children->Item(i, getter_AddRefs(node));
element = do_QueryInterface(node);
if (!element)
continue;
node->GetNamespaceURI(nsURI);
node->GetLocalName(localName);
if (nsURI.EqualsLiteral(NS_NAMESPACE_XML_SCHEMA) &&
localName.EqualsLiteral("schema")) {
// we don't have to check if the schema was already added because
// nsSchemaLoader::ProcessSchemaElement takes care of that.
nsCOMPtr<nsISchema> schema;
nsresult rv = mSchemas->ProcessSchemaElement(element, nsnull,
getter_AddRefs(schema));
if (!NS_SUCCEEDED(rv)) {
nsXFormsUtils::ReportError(NS_LITERAL_STRING("schemaProcessError"), node);
}
}
}
}
// 3. if applicable, initialize P3P
// 4. construct instance data from initial instance data. apply all
// <bind> elements in document order.
// we get the instance data from our instance child nodes
// We're done initializing this model.
return NS_OK;
}
nsresult
nsXFormsModelElement::InitializeControls()
{
#ifdef DEBUG
printf("nsXFormsModelElement::InitializeControls()\n");
#endif
nsPostRefresh postRefresh = nsPostRefresh();
PRInt32 controlCount = mFormControls.Count();
nsresult rv;
for (PRInt32 i = 0; i < controlCount; ++i) {
// Get control
nsIXFormsControl *control = NS_STATIC_CAST(nsIXFormsControl*,
mFormControls[i]);
if (!control)
continue;
// Rebind
rv = control->Bind();
NS_ENSURE_SUCCESS(rv, rv);
// Get bound node
nsCOMPtr<nsIDOMNode> boundNode;
rv = control->GetBoundNode(getter_AddRefs(boundNode));
NS_ENSURE_SUCCESS(rv, rv);
// Set MIP states on control
rv = SetStatesInternal(control, boundNode, PR_TRUE);
NS_ENSURE_SUCCESS(rv, rv);
// Refresh controls
rv = control->Refresh();
NS_ENSURE_SUCCESS(rv, rv);
}
return NS_OK;
}
void
nsXFormsModelElement::MaybeNotifyCompletion()
{
nsCOMPtr<nsIDOMDocument> domDoc;
mElement->GetOwnerDocument(getter_AddRefs(domDoc));
const nsVoidArray *models = GetModelList(domDoc);
if (!models) {
NS_NOTREACHED("no model list property");
return;
}
PRInt32 i;
// Nothing to be done if any model is incomplete or hasn't seen
// DOMContentLoaded.
for (i = 0; i < models->Count(); ++i) {
nsXFormsModelElement *model =
NS_STATIC_CAST(nsXFormsModelElement *, models->ElementAt(i));
if (!model->mDocumentLoaded || !model->IsComplete())
return;
}
// Okay, dispatch xforms-model-construct-done and xforms-ready events!
for (i = 0; i < models->Count(); ++i) {
nsXFormsModelElement *model =
NS_STATIC_CAST(nsXFormsModelElement *, models->ElementAt(i));
nsXFormsUtils::DispatchEvent(model->mElement, eEvent_ModelConstructDone);
}
nsXFormsModelElement::ProcessDeferredBinds(domDoc);
for (i = 0; i < models->Count(); ++i) {
nsXFormsModelElement *model =
NS_STATIC_CAST(nsXFormsModelElement *, models->ElementAt(i));
nsXFormsUtils::DispatchEvent(model->mElement, eEvent_Ready);
}
}
static void
DeleteAutoString(void *aObject,
nsIAtom *aPropertyName,
void *aPropertyValue,
void *aData)
{
delete NS_STATIC_CAST(nsAutoString*, aPropertyValue);
}
nsresult
nsXFormsModelElement::ProcessBind(nsIXFormsXPathEvaluator *aEvaluator,
nsIDOMNode *aContextNode,
PRInt32 aContextPosition,
PRInt32 aContextSize,
nsIDOMElement *aBindElement)
{
// Get the model item properties specified by this \<bind\>.
nsCOMPtr<nsIDOMNSXPathExpression> props[eModel__count];
nsAutoString propStrings[eModel__count];
nsresult rv;
nsAutoString attrStr;
for (PRUint32 i = 0; i < eModel__count; ++i) {
sModelPropsList[i]->ToString(attrStr);
aBindElement->GetAttribute(attrStr, propStrings[i]);
if (!propStrings[i].IsEmpty() &&
i != eModel_type &&
i != eModel_p3ptype) {
rv = aEvaluator->CreateExpression(propStrings[i], aBindElement,
getter_AddRefs(props[i]));
if (NS_FAILED(rv)) {
const PRUnichar *strings[] = { propStrings[i].get() };
nsXFormsUtils::ReportError(NS_LITERAL_STRING("mipParseError"),
strings, 1, aBindElement, aBindElement);
nsXFormsUtils::DispatchEvent(mElement, eEvent_ComputeException);
return rv;
}
}
}
// Find the nodeset that this bind applies to.
nsCOMPtr<nsIDOMXPathResult> result;
nsAutoString expr;
aBindElement->GetAttribute(NS_LITERAL_STRING("nodeset"), expr);
if (expr.IsEmpty()) {
expr = NS_LITERAL_STRING(".");
}
rv = aEvaluator->Evaluate(expr, aContextNode, aContextSize, aContextPosition,
aBindElement,
nsIDOMXPathResult::ORDERED_NODE_SNAPSHOT_TYPE,
nsnull, getter_AddRefs(result));
if (NS_FAILED(rv)) {
#ifdef DEBUG
printf("xforms-binding-exception: XPath Evaluation failed\n");
#endif
const PRUnichar *strings[] = { expr.get() };
nsXFormsUtils::ReportError(NS_LITERAL_STRING("nodesetEvaluateError"),
strings, 1, aBindElement, aBindElement);
nsXFormsUtils::DispatchEvent(mElement, eEvent_BindingException);
return rv;
}
NS_ENSURE_STATE(result);
PRUint32 snapLen;
rv = result->GetSnapshotLength(&snapLen);
NS_ENSURE_SUCCESS(rv, rv);
// Iterate over resultset
nsCOMArray<nsIDOMNode> deps;
nsCOMPtr<nsIDOMNode> node;
PRUint32 snapItem;
for (snapItem = 0; snapItem < snapLen; ++snapItem) {
rv = result->SnapshotItem(snapItem, getter_AddRefs(node));
NS_ENSURE_SUCCESS(rv, rv);
if (!node) {
NS_WARNING("nsXFormsModelElement::ProcessBind(): Empty node in result set.");
continue;
}
// Apply MIPs
nsXFormsXPathParser parser;
nsXFormsXPathAnalyzer analyzer(aEvaluator, aBindElement);
PRBool multiMIP = PR_FALSE;
for (PRUint32 j = 0; j < eModel__count; ++j) {
if (propStrings[j].IsEmpty())
continue;
// type and p3ptype are stored as properties on the instance node
if (j == eModel_type || j == eModel_p3ptype) {
nsAutoPtr<nsAutoString> prop (new nsAutoString(propStrings[j]));
nsCOMPtr<nsIContent> content = do_QueryInterface(node);
if (content) {
rv = content->SetProperty(sModelPropsList[j],
prop,
DeleteAutoString);
} else {
nsCOMPtr<nsIAttribute> attribute = do_QueryInterface(node);
if (attribute) {
rv = attribute->SetProperty(sModelPropsList[j],
prop,
DeleteAutoString);
} else {
NS_WARNING("node is neither nsIContent or nsIAttribute");
continue;
}
}
if (NS_SUCCEEDED(rv)) {
prop.forget();
} else {
return rv;
}
if (rv == NS_PROPTABLE_PROP_OVERWRITTEN) {
multiMIP = PR_TRUE;
break;
}
} else {
// the rest of the MIPs are given to the MDG
nsCOMPtr<nsIDOMNSXPathExpression> expr = props[j];
// Get node dependencies
nsAutoPtr<nsXFormsXPathNode> xNode(parser.Parse(propStrings[j]));
deps.Clear();
rv = analyzer.Analyze(node, xNode, expr, &propStrings[j], &deps,
snapItem + 1, snapLen);
NS_ENSURE_SUCCESS(rv, rv);
// Insert into MDG
rv = mMDG.AddMIP((ModelItemPropName) j,
expr,
&deps,
parser.UsesDynamicFunc(),
node,
snapItem + 1,
snapLen);
// if the call results in NS_ERROR_ABORT the page has tried to set a
// MIP twice, break and emit an exception.
if (rv == NS_ERROR_ABORT) {
multiMIP = PR_TRUE;
break;
}
NS_ENSURE_SUCCESS(rv, rv);
}
}
// If the attribute is already there, the page sets a MIP twice
// which is illegal, and should result in an xforms-binding-exception.
// @see http://www.w3.org/TR/xforms/slice4.html#evt-modelConstruct
// (item 4, c)
if (multiMIP) {
#ifdef DEBUG
printf("xforms-binding-exception: Multiple MIPs on same node!");
#endif
nsXFormsUtils::ReportError(NS_LITERAL_STRING("multiMIPError"),
aBindElement);
nsXFormsUtils::DispatchEvent(aBindElement,
eEvent_BindingException);
return NS_ERROR_FAILURE;
}
// Now evaluate any child \<bind\> elements.
nsCOMPtr<nsIDOMNodeList> children;
aBindElement->GetChildNodes(getter_AddRefs(children));
if (children) {
PRUint32 childCount = 0;
children->GetLength(&childCount);
nsCOMPtr<nsIDOMNode> child;
nsAutoString value;
for (PRUint32 k = 0; k < childCount; ++k) {
children->Item(k, getter_AddRefs(child));
if (child) {
child->GetLocalName(value);
if (!value.EqualsLiteral("bind"))
continue;
child->GetNamespaceURI(value);
if (!value.EqualsLiteral(NS_NAMESPACE_XFORMS))
continue;
rv = ProcessBind(aEvaluator, node,
snapItem + 1, snapLen,
nsCOMPtr<nsIDOMElement>(do_QueryInterface(child)));
NS_ENSURE_SUCCESS(rv, rv);
}
}
}
}
return NS_OK;
}
NS_IMETHODIMP
nsXFormsModelElement::SetStates(nsIXFormsControl *aControl, nsIDOMNode *aBoundNode)
{
return SetStatesInternal(aControl, aBoundNode, PR_TRUE);
}
NS_IMETHODIMP
nsXFormsModelElement::GetInstanceList(nsCOMArray<nsIInstanceElementPrivate> **aInstanceList)
{
if (aInstanceList) {
*aInstanceList = &mInstanceList;
}
return NS_OK;
}
nsresult
nsXFormsModelElement::AddInstanceElement(nsIInstanceElementPrivate *aInstEle)
{
// always append to the end of the list. We need to keep the elements in
// document order since the first instance element is the default instance
// document for the model.
mInstanceList.AppendObject(aInstEle);
return NS_OK;
}
/* static */ void
nsXFormsModelElement::Startup()
{
sModelPropsList[eModel_type] = nsXFormsAtoms::type;
sModelPropsList[eModel_readonly] = nsXFormsAtoms::readonly;
sModelPropsList[eModel_required] = nsXFormsAtoms::required;
sModelPropsList[eModel_relevant] = nsXFormsAtoms::relevant;
sModelPropsList[eModel_calculate] = nsXFormsAtoms::calculate;
sModelPropsList[eModel_constraint] = nsXFormsAtoms::constraint;
sModelPropsList[eModel_p3ptype] = nsXFormsAtoms::p3ptype;
}
static void
DeleteBindList(void *aObject,
nsIAtom *aPropertyName,
void *aPropertyValue,
void *aData)
{
delete NS_STATIC_CAST(nsCOMArray<nsIXFormsControl> *, aPropertyValue);
}
/* static */ nsresult
nsXFormsModelElement::DeferElementBind(nsIDOMDocument *aDoc,
nsIXFormsControlBase *aControl)
{
nsCOMPtr<nsIDocument> doc = do_QueryInterface(aDoc);
if (!doc || !aControl) {
return NS_ERROR_FAILURE;
}
nsCOMArray<nsIXFormsControlBase> *deferredBindList =
NS_STATIC_CAST(nsCOMArray<nsIXFormsControlBase> *,
doc->GetProperty(nsXFormsAtoms::deferredBindListProperty));
if (!deferredBindList) {
deferredBindList = new nsCOMArray<nsIXFormsControlBase>(16);
NS_ENSURE_TRUE(deferredBindList, NS_ERROR_OUT_OF_MEMORY);
doc->SetProperty(nsXFormsAtoms::deferredBindListProperty, deferredBindList,
DeleteBindList);
}
// always append to the end of the list. We need to keep the elements in
// document order when we process the binds later. Otherwise we have trouble
// when an element is trying to bind and should use its parent as a context
// for the xpath evaluation but the parent isn't bound yet.
deferredBindList->AppendObject(aControl);
return NS_OK;
}
/* static */ void
nsXFormsModelElement::ProcessDeferredBinds(nsIDOMDocument *aDoc)
{
nsCOMPtr<nsIDocument> doc = do_QueryInterface(aDoc);
if (!doc) {
return;
}
nsPostRefresh postRefresh = nsPostRefresh();
doc->SetProperty(nsXFormsAtoms::readyForBindProperty, doc);
nsCOMArray<nsIXFormsControlBase> *deferredBindList =
NS_STATIC_CAST(nsCOMArray<nsIXFormsControlBase> *,
doc->GetProperty(nsXFormsAtoms::deferredBindListProperty));
if (deferredBindList) {
for (int i = 0; i < deferredBindList->Count(); ++i) {
nsIXFormsControlBase *base = deferredBindList->ObjectAt(i);
if (base) {
base->Bind();
base->Refresh();
}
}
doc->DeleteProperty(nsXFormsAtoms::deferredBindListProperty);
}
}
nsresult
NS_NewXFormsModelElement(nsIXTFElement **aResult)
{
*aResult = new nsXFormsModelElement();
if (!*aResult)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*aResult);
return NS_OK;
}
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