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gecko-dev/extensions/xforms/nsXFormsUtils.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>
*
* 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 "nsXFormsUtils.h"
#include "nsString.h"
#include "nsXFormsAtoms.h"
#include "nsIDOMElement.h"
#include "nsIDOMNSHTMLElement.h"
#include "nsIDocument.h"
#include "nsINameSpaceManager.h"
#include "nsIDOMNodeList.h"
#include "nsIXFormsXPathEvaluator.h"
#include "nsIDOMXPathResult.h"
#include "nsIDOMXPathNSResolver.h"
#include "nsIDOMDocument.h"
#include "nsIDOMText.h"
#include "nsIModelElementPrivate.h"
#include "nsIXFormsModelElement.h"
#include "nsIXFormsControl.h"
#include "nsIInstanceElementPrivate.h"
#include "nsIDOMNSDocument.h"
#include "nsIDOMLocation.h"
#include "nsIDOMSerializer.h"
#include "nsIContent.h"
#include "nsIAttribute.h"
#include "nsXFormsAtoms.h"
#include "nsIXFormsRepeatElement.h"
#include "nsIXFormsContextControl.h"
#include "nsIDOMDocumentEvent.h"
#include "nsIDOMEvent.h"
#include "nsIDOMEventTarget.h"
#include "nsDataHashtable.h"
#include "nsAutoPtr.h"
#include "nsXFormsXPathAnalyzer.h"
#include "nsXFormsXPathParser.h"
#include "nsXFormsXPathNode.h"
#include "nsIDOMNSXPathExpression.h"
#include "nsIScriptSecurityManager.h"
#include "nsIPermissionManager.h"
#include "nsServiceManagerUtils.h"
#include "nsIXFormsUtilityService.h"
#include "nsIDOMAttr.h"
#include "nsIDOM3Node.h"
#include "nsIConsoleService.h"
#include "nsIStringBundle.h"
#include "nsIDOMNSEvent.h"
#include "nsIURI.h"
#include "nsIPrivateDOMEvent.h"
#include "nsIDOMNamedNodeMap.h"
#include "nsIParserService.h"
#include "nsIPrefBranch.h"
#include "nsIPrefService.h"
#include "nsIDOMDocumentView.h"
#include "nsIDOMAbstractView.h"
#include "nsPIDOMWindow.h"
#include "nsIDOMDocumentType.h"
#include "nsIDOMEntity.h"
#include "nsIDOMNotation.h"
#include "nsIEventStateManager.h"
#define CANCELABLE 0x01
#define BUBBLES 0x02
const EventData sXFormsEventsEntries[42] = {
{ "xforms-model-construct", PR_FALSE, PR_TRUE },
{ "xforms-model-construct-done", PR_FALSE, PR_TRUE },
{ "xforms-ready", PR_FALSE, PR_TRUE },
{ "xforms-model-destruct", PR_FALSE, PR_TRUE },
{ "xforms-previous", PR_TRUE, PR_FALSE },
{ "xforms-next", PR_TRUE, PR_FALSE },
{ "xforms-focus", PR_TRUE, PR_FALSE },
{ "xforms-help", PR_TRUE, PR_TRUE },
{ "xforms-hint", PR_TRUE, PR_TRUE },
{ "xforms-rebuild", PR_TRUE, PR_TRUE },
{ "xforms-refresh", PR_TRUE, PR_TRUE },
{ "xforms-revalidate", PR_TRUE, PR_TRUE },
{ "xforms-recalculate", PR_TRUE, PR_TRUE },
{ "xforms-reset", PR_TRUE, PR_TRUE },
{ "xforms-submit", PR_TRUE, PR_TRUE },
{ "DOMActivate", PR_TRUE, PR_TRUE },
{ "xforms-value-changed", PR_FALSE, PR_TRUE },
{ "xforms-select", PR_FALSE, PR_TRUE },
{ "xforms-deselect", PR_FALSE, PR_TRUE },
{ "xforms-scroll-first", PR_FALSE, PR_TRUE },
{ "xforms-scroll-last", PR_FALSE, PR_TRUE },
{ "xforms-insert", PR_FALSE, PR_TRUE },
{ "xforms-delete", PR_FALSE, PR_TRUE },
{ "xforms-valid", PR_FALSE, PR_TRUE },
{ "xforms-invalid", PR_FALSE, PR_TRUE },
{ "DOMFocusIn", PR_FALSE, PR_TRUE },
{ "DOMFocusOut", PR_FALSE, PR_TRUE },
{ "xforms-readonly", PR_FALSE, PR_TRUE },
{ "xforms-readwrite", PR_FALSE, PR_TRUE },
{ "xforms-required", PR_FALSE, PR_TRUE },
{ "xforms-optional", PR_FALSE, PR_TRUE },
{ "xforms-enabled", PR_FALSE, PR_TRUE },
{ "xforms-disabled", PR_FALSE, PR_TRUE },
{ "xforms-in-range", PR_FALSE, PR_TRUE },
{ "xforms-out-of-range", PR_FALSE, PR_TRUE },
{ "xforms-submit-done", PR_FALSE, PR_TRUE },
{ "xforms-submit-error", PR_FALSE, PR_TRUE },
{ "xforms-binding-exception", PR_FALSE, PR_TRUE },
{ "xforms-link-exception", PR_FALSE, PR_TRUE },
{ "xforms-link-error", PR_FALSE, PR_TRUE },
{ "xforms-compute-exception", PR_FALSE, PR_TRUE },
{ "xforms-moz-hint-off", PR_FALSE, PR_TRUE }
};
static const EventData sEventDefaultsEntries[] = {
//UIEvents already in sXFormsEvents
//MouseEvent
{ "click", PR_TRUE, PR_TRUE },
{ "mousedown", PR_TRUE, PR_TRUE },
{ "mouseup", PR_TRUE, PR_TRUE },
{ "mouseover", PR_TRUE, PR_TRUE },
{ "mousemove", PR_FALSE, PR_TRUE },
{ "mouseout", PR_TRUE, PR_TRUE },
//MutationEvent
{ "DOMSubtreeModified", PR_FALSE, PR_TRUE },
{ "DOMNodeInserted", PR_FALSE, PR_TRUE },
{ "DOMNodeRemoved", PR_FALSE, PR_TRUE },
{ "DOMNodeRemovedFromDocument", PR_FALSE, PR_FALSE },
{ "DOMNodeInsertedIntoDocument", PR_FALSE, PR_FALSE },
{ "DOMAttrModified", PR_FALSE, PR_TRUE },
{ "DOMCharacterDataModified", PR_FALSE, PR_TRUE },
//HTMLEvents
{ "load", PR_FALSE, PR_FALSE },
{ "unload", PR_FALSE, PR_FALSE },
{ "abort", PR_FALSE, PR_TRUE },
{ "error", PR_FALSE, PR_TRUE },
{ "select", PR_FALSE, PR_TRUE },
{ "change", PR_FALSE, PR_TRUE },
{ "submit", PR_TRUE, PR_TRUE },
{ "reset", PR_FALSE, PR_TRUE },
{ "focus", PR_FALSE, PR_FALSE },
{ "blur", PR_FALSE, PR_FALSE },
{ "resize", PR_FALSE, PR_TRUE },
{ "scroll", PR_FALSE, PR_TRUE }
};
static nsDataHashtable<nsStringHashKey,PRUint32> sXFormsEvents;
static nsDataHashtable<nsStringHashKey,PRUint32> sEventDefaults;
const PRInt32 kDefaultIntrinsicState =
NS_EVENT_STATE_ENABLED |
NS_EVENT_STATE_VALID |
NS_EVENT_STATE_OPTIONAL |
NS_EVENT_STATE_MOZ_READWRITE;
const PRInt32 kDisabledIntrinsicState =
NS_EVENT_STATE_DISABLED |
NS_EVENT_STATE_VALID |
NS_EVENT_STATE_OPTIONAL |
NS_EVENT_STATE_MOZ_READWRITE;
/* static */ nsresult
nsXFormsUtils::Init()
{
if (!sXFormsEvents.Init())
return NS_ERROR_FAILURE;
unsigned int i;
for (i = 0; i < NS_ARRAY_LENGTH(sXFormsEventsEntries); ++i) {
PRUint32 flag = 0;
if (sXFormsEventsEntries[i].canCancel)
flag |= CANCELABLE;
if (sXFormsEventsEntries[i].canBubble)
flag |= BUBBLES;
sXFormsEvents.Put(NS_ConvertUTF8toUTF16(sXFormsEventsEntries[i].name),
flag);
}
if (!sEventDefaults.Init())
return NS_ERROR_FAILURE;
for (i = 0; i < NS_ARRAY_LENGTH(sEventDefaultsEntries); ++i) {
PRUint32 flag = 0;
if (sEventDefaultsEntries[i].canCancel)
flag |= CANCELABLE;
if (sEventDefaultsEntries[i].canBubble)
flag |= BUBBLES;
sEventDefaults.Put(NS_ConvertUTF8toUTF16(sEventDefaultsEntries[i].name),
flag);
}
return NS_OK;
}
/* static */ PRBool
nsXFormsUtils::GetParentModel(nsIDOMElement *aBindElement,
nsIModelElementPrivate **aModel)
{
PRBool res = PR_TRUE;
nsCOMPtr<nsIDOMNode> modelWrapper;
// Walk up the tree looking for the containing model.
aBindElement->GetParentNode(getter_AddRefs(modelWrapper));
nsAutoString localName, namespaceURI;
nsCOMPtr<nsIDOMNode> temp;
while (modelWrapper) {
modelWrapper->GetLocalName(localName);
if (localName.EqualsLiteral("model")) {
modelWrapper->GetNamespaceURI(namespaceURI);
if (namespaceURI.EqualsLiteral(NS_NAMESPACE_XFORMS))
break;
}
temp.swap(modelWrapper);
temp->GetParentNode(getter_AddRefs(modelWrapper));
// Model is not the immediate parent, this is a reference to a nested
// (invalid) bind
res = PR_FALSE;
}
*aModel = nsnull;
nsCOMPtr<nsIModelElementPrivate> model = do_QueryInterface(modelWrapper);
model.swap(*aModel);
return res;
}
/**
* beaufour: Section 7.4 in the specification does a really bad job of
* explaining how to find the model, so the code below is my interpretation of
* it...
*
* @see http://bugzilla.mozilla.org/show_bug.cgi?id=265216
*/
/* static */ nsresult
nsXFormsUtils::GetNodeContext(nsIDOMElement *aElement,
PRUint32 aElementFlags,
nsIModelElementPrivate **aModel,
nsIDOMElement **aBindElement,
PRBool *aOuterBind,
nsIXFormsControl **aParentControl,
nsIDOMNode **aContextNode,
PRInt32 *aContextPosition,
PRInt32 *aContextSize)
{
NS_ENSURE_ARG(aElement);
NS_ENSURE_ARG(aOuterBind);
NS_ENSURE_ARG_POINTER(aContextNode);
NS_ENSURE_ARG_POINTER(aBindElement);
*aBindElement = nsnull;
if (aParentControl)
*aParentControl = nsnull;
// Set default context size and position
if (aContextSize)
*aContextSize = 1;
if (aContextPosition)
*aContextPosition = 1;
// Find correct model element
nsCOMPtr<nsIDOMDocument> domDoc;
aElement->GetOwnerDocument(getter_AddRefs(domDoc));
NS_ENSURE_TRUE(domDoc, NS_ERROR_FAILURE);
nsAutoString bindId;
NS_NAMED_LITERAL_STRING(bindStr, "bind");
aElement->GetAttribute(bindStr, bindId);
if (!bindId.IsEmpty()) {
// CASE 1: Use @bind
domDoc->GetElementById(bindId, aBindElement);
if (!IsXFormsElement(*aBindElement, bindStr)) {
const PRUnichar *strings[] = { bindId.get(), bindStr.get() };
nsXFormsUtils::ReportError(NS_LITERAL_STRING("idRefError"),
strings, 2, aElement, aElement);
DispatchEvent(aElement, eEvent_BindingException);
return NS_ERROR_ABORT;
}
*aOuterBind = GetParentModel(*aBindElement, aModel);
NS_ENSURE_STATE(*aModel);
} else {
if (aElementFlags & ELEMENT_WITH_MODEL_ATTR) {
// CASE 2: Use @model
// If bind did not set model, and the element has a model attribute we use this
nsAutoString modelId;
NS_NAMED_LITERAL_STRING(modelStr, "model");
aElement->GetAttribute(modelStr, modelId);
if (!modelId.IsEmpty()) {
nsCOMPtr<nsIDOMElement> modelElement;
domDoc->GetElementById(modelId, getter_AddRefs(modelElement));
nsCOMPtr<nsIModelElementPrivate> model = do_QueryInterface(modelElement);
// No element found, or element not a \<model\> element
if (!model) {
const PRUnichar *strings[] = { modelId.get(), modelStr.get() };
nsXFormsUtils::ReportError(NS_LITERAL_STRING("idRefError"),
strings, 2, aElement, aElement);
nsXFormsUtils::DispatchEvent(aElement, eEvent_BindingException);
return NS_ERROR_FAILURE;
}
NS_ADDREF(*aModel = model);
}
}
// Search for a parent setting context for us
nsresult rv = FindParentContext(aElement,
aModel,
aParentControl,
aContextNode,
aContextPosition,
aContextSize);
// CASE 3/4: Use parent's model / first model in document.
// If FindParentContext() does not find a parent context but |aModel| is not
// set, it sets the model to the first model in the document.
NS_ENSURE_SUCCESS(rv, rv);
}
// if context node is not set, it's the document element of the model's
// default instance
if (!*aContextNode) {
nsCOMPtr<nsIXFormsModelElement> modelInt = do_QueryInterface(*aModel);
NS_ENSURE_STATE(modelInt);
nsCOMPtr<nsIDOMDocument> instanceDoc;
modelInt->GetInstanceDocument(EmptyString(),
getter_AddRefs(instanceDoc));
NS_ENSURE_STATE(instanceDoc);
nsIDOMElement* docElement;
instanceDoc->GetDocumentElement(&docElement); // addrefs
NS_ENSURE_STATE(docElement);
*aContextNode = docElement; // addref'ed above
}
return NS_OK;
}
/* static */ already_AddRefed<nsIModelElementPrivate>
nsXFormsUtils::GetModel(nsIDOMElement *aElement,
nsIXFormsControl **aParentControl,
PRUint32 aElementFlags,
nsIDOMNode **aContextNode)
{
nsCOMPtr<nsIModelElementPrivate> model;
nsCOMPtr<nsIDOMNode> contextNode;
nsCOMPtr<nsIDOMElement> bind;
PRBool outerbind;
GetNodeContext(aElement,
aElementFlags,
getter_AddRefs(model),
getter_AddRefs(bind),
&outerbind,
aParentControl,
getter_AddRefs(contextNode));
NS_ENSURE_TRUE(model, nsnull);
if (aContextNode) {
NS_IF_ADDREF(*aContextNode = contextNode);
}
nsIModelElementPrivate *result = nsnull;
if (model)
NS_ADDREF(result = model);
return result;
}
/* static */ nsresult
nsXFormsUtils::EvaluateXPath(const nsAString &aExpression,
nsIDOMNode *aContextNode,
nsIDOMNode *aResolverNode,
PRUint16 aResultType,
nsIDOMXPathResult **aResult,
PRInt32 aContextPosition,
PRInt32 aContextSize,
nsCOMArray<nsIDOMNode> *aSet,
nsStringArray *aIndexesUsed)
{
NS_ENSURE_ARG_POINTER(aResult);
*aResult = nsnull;
nsCOMPtr<nsIXFormsXPathEvaluator> eval =
do_CreateInstance("@mozilla.org/dom/xforms-xpath-evaluator;1");
NS_ENSURE_STATE(eval);
nsCOMPtr<nsIDOMNSXPathExpression> expression;
nsresult rv = eval->CreateExpression(aExpression, aResolverNode,
getter_AddRefs(expression));
PRBool throwException = PR_FALSE;
if (!expression) {
const nsPromiseFlatString& flat = PromiseFlatString(aExpression);
const PRUnichar *strings[] = { flat.get() };
nsXFormsUtils::ReportError(NS_LITERAL_STRING("exprParseError"),
strings, 1, aContextNode, nsnull);
throwException = PR_TRUE;
} else {
nsCOMPtr<nsISupports> supResult;
rv = expression->EvaluateWithContext(aContextNode,
aContextPosition,
aContextSize,
aResultType,
nsnull,
getter_AddRefs(supResult));
if (NS_SUCCEEDED(rv) && supResult) {
/// @todo beaufour: This is somewhat "hackish". Hopefully, this will
/// improve when we integrate properly with Transformiix (XXX)
/// @see http://bugzilla.mozilla.org/show_bug.cgi?id=265212
if (aSet) {
nsXFormsXPathParser parser;
nsXFormsXPathAnalyzer analyzer(eval, aResolverNode);
nsAutoPtr<nsXFormsXPathNode> xNode(parser.Parse(aExpression));
rv = analyzer.Analyze(aContextNode,
xNode,
expression,
&aExpression,
aSet,
aContextPosition,
aContextSize,
aResultType == nsIDOMXPathResult::STRING_TYPE);
NS_ENSURE_SUCCESS(rv, rv);
if (aIndexesUsed)
*aIndexesUsed = analyzer.IndexesUsed();
}
CallQueryInterface(supResult, aResult); // addrefs
return NS_OK;
}
if (rv == NS_ERROR_XFORMS_CALCUATION_EXCEPTION) {
const nsPromiseFlatString& flat = PromiseFlatString(aExpression);
const PRUnichar *strings[] = { flat.get() };
nsXFormsUtils::ReportError(NS_LITERAL_STRING("exprEvaluateError"),
strings, 1, aContextNode, nsnull);
throwException = PR_TRUE;
}
}
// Throw xforms-compute-exception
if (throwException) {
nsCOMPtr<nsIDOMElement> resolverElement = do_QueryInterface(aResolverNode);
nsCOMPtr<nsIModelElementPrivate> modelPriv = nsXFormsUtils::GetModel(resolverElement);
nsCOMPtr<nsIDOMNode> model = do_QueryInterface(modelPriv);
DispatchEvent(model, eEvent_ComputeException);
}
return rv;
}
/* static */ nsresult
nsXFormsUtils::EvaluateNodeBinding(nsIDOMElement *aElement,
PRUint32 aElementFlags,
const nsString &aBindingAttr,
const nsString &aDefaultRef,
PRUint16 aResultType,
nsIModelElementPrivate **aModel,
nsIDOMXPathResult **aResult,
PRBool *aUsesModelBind,
nsIXFormsControl **aParentControl,
nsCOMArray<nsIDOMNode> *aDeps,
nsStringArray *aIndexesUsed)
{
if (!aElement || !aModel || !aResult || !aUsesModelBind) {
return NS_ERROR_FAILURE;
}
*aModel = nsnull;
*aResult = nsnull;
*aUsesModelBind = PR_FALSE;
nsCOMPtr<nsIDOMNode> contextNode;
nsCOMPtr<nsIDOMElement> bindElement;
PRBool outerBind;
PRInt32 contextPosition;
PRInt32 contextSize;
nsresult rv = GetNodeContext(aElement,
aElementFlags,
aModel,
getter_AddRefs(bindElement),
&outerBind,
aParentControl,
getter_AddRefs(contextNode),
&contextPosition,
&contextSize);
NS_ENSURE_SUCCESS(rv, rv);
if (!contextNode) {
return NS_OK; // this will happen if the doc is still loading
}
////////////////////
// STEP 1: Handle @bind'ings
if (bindElement) {
if (outerBind) {
// If there is an outer bind element, we retrieve its nodeset.
nsCOMPtr<nsIContent> content(do_QueryInterface(bindElement));
NS_ASSERTION(content, "nsIDOMElement not implementing nsIContent?!");
NS_IF_ADDREF(*aResult =
NS_STATIC_CAST(nsIDOMXPathResult*,
content->GetProperty(nsXFormsAtoms::bind)));
*aUsesModelBind = PR_TRUE;
return NS_OK;
}
// References to inner binds are not defined.
// "When you refer to @id on a nested bind it returns an emtpy nodeset
// because it has no meaning. The XForms WG will assign meaning in the
// future."
// @see http://www.w3.org/MarkUp/Group/2004/11/f2f/2004Nov11#resolution6
nsXFormsUtils::ReportError(NS_LITERAL_STRING("innerBindRefError"),
aElement);
return NS_ERROR_FAILURE;
}
////////////////////
// STEP 2: No bind attribute
// If there's no bind attribute, we expect there to be a |aBindingAttr|
// attribute.
nsAutoString expr;
aElement->GetAttribute(aBindingAttr, expr);
if (expr.IsEmpty()) {
// if there's no default binding, bail out
if (aDefaultRef.IsEmpty())
return NS_OK;
expr.Assign(aDefaultRef);
}
// Evaluate |expr|
nsCOMPtr<nsIDOMXPathResult> res;
rv = EvaluateXPath(expr, contextNode, aElement, aResultType,
getter_AddRefs(res), contextPosition, contextSize,
aDeps, aIndexesUsed);
NS_ENSURE_SUCCESS(rv, rv);
////////////////////
// STEP 3: Check for lazy binding
// If the evaluation failed because the node wasn't there and we should be
// lazy authoring, then create it (if the situation qualifies, of course).
// Novell only allows lazy authoring of single bound nodes.
if (aResultType == nsIDOMXPathResult::FIRST_ORDERED_NODE_TYPE) {
if (res) {
nsCOMPtr<nsIDOMNode> node;
rv = res->GetSingleNodeValue(getter_AddRefs(node));
if (NS_SUCCEEDED(rv) && !node) {
PRBool lazy = PR_FALSE;
if (*aModel)
(*aModel)->GetLazyAuthored(&lazy);
if (lazy) {
// according to sec 4.2.2 in the spec, "An instance data element node
// will be created using the binding expression from the user
// interface control as the name. If the name is not a valid QName,
// processing halts with an exception (xforms-binding-exception)"
nsCOMPtr<nsIParserService> parserService =
do_GetService(NS_PARSERSERVICE_CONTRACTID);
if (NS_SUCCEEDED(rv) && parserService) {
const PRUnichar* colon;
rv = parserService->CheckQName(expr, PR_TRUE, &colon);
if (NS_SUCCEEDED(rv)) {
nsAutoString namespaceURI(EmptyString());
// if we detect a namespace, we'll add it to the node, otherwise
// we'll use the empty namespace. If we should have gotten a
// namespace and didn't, then we might as well give up.
if (colon) {
nsCOMPtr<nsIDOM3Node> dom3node = do_QueryInterface(aElement);
rv = dom3node->LookupNamespaceURI(Substring(expr.get(), colon),
namespaceURI);
NS_ENSURE_SUCCESS(rv, rv);
}
if (NS_SUCCEEDED(rv)) {
nsCOMPtr<nsIInstanceElementPrivate> instance;
rv = (*aModel)->FindInstanceElement(EmptyString(),
getter_AddRefs(instance));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIDOMDocument> domdoc;
instance->GetInstanceDocument(getter_AddRefs(domdoc));
nsCOMPtr<nsIDOMElement> instanceDataEle;
nsCOMPtr<nsIDOMNode> childReturn;
rv = domdoc->CreateElementNS(namespaceURI, expr,
getter_AddRefs(instanceDataEle));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIDOMElement> instanceRoot;
rv = domdoc->GetDocumentElement(getter_AddRefs(instanceRoot));
rv = instanceRoot->AppendChild(instanceDataEle,
getter_AddRefs(childReturn));
NS_ENSURE_SUCCESS(rv, rv);
}
// now that we inserted the lazy authored node, try to bind
// again
rv = EvaluateXPath(expr, contextNode, aElement, aResultType,
getter_AddRefs(res), contextPosition,
contextSize, aDeps, aIndexesUsed);
NS_ENSURE_SUCCESS(rv, rv);
} else {
const PRUnichar *strings[] = { expr.get() };
nsXFormsUtils::ReportError(NS_LITERAL_STRING("invalidQName"),
strings, 1, aElement, aElement);
nsXFormsUtils::DispatchEvent(aElement, eEvent_BindingException);
}
}
}
}
}
}
res.swap(*aResult); // exchanges ref
return NS_OK;
}
/* static */ void
nsXFormsUtils::GetNodeValue(nsIDOMNode* aDataNode, nsAString& aNodeValue)
{
PRUint16 nodeType;
aDataNode->GetNodeType(&nodeType);
switch(nodeType) {
case nsIDOMNode::ATTRIBUTE_NODE:
case nsIDOMNode::TEXT_NODE:
// "Returns the string-value of the node."
aDataNode->GetNodeValue(aNodeValue);
return;
case nsIDOMNode::ELEMENT_NODE:
{
// "If text child nodes are present, returns the string-value of the
// first text child node. Otherwise, returns "" (the empty string)".
// Find the first child text node.
nsCOMPtr<nsIDOMNodeList> childNodes;
aDataNode->GetChildNodes(getter_AddRefs(childNodes));
if (childNodes) {
nsCOMPtr<nsIDOMNode> child;
PRUint32 childCount;
childNodes->GetLength(&childCount);
for (PRUint32 i = 0; i < childCount; ++i) {
childNodes->Item(i, getter_AddRefs(child));
NS_ASSERTION(child, "DOMNodeList length is wrong!");
child->GetNodeType(&nodeType);
if (nodeType == nsIDOMNode::TEXT_NODE) {
child->GetNodeValue(aNodeValue);
return;
}
}
}
// No child text nodes. Return an empty string.
}
break;
default:
// namespace, processing instruction, comment, XPath root node
NS_WARNING("String value for this node type is not defined");
}
aNodeValue.Truncate(0);
}
/* static */ void
nsXFormsUtils::SetNodeValue(nsIDOMNode* aDataNode, const nsString& aNodeValue)
{
PRUint16 nodeType;
aDataNode->GetNodeType(&nodeType);
switch(nodeType) {
case nsIDOMNode::ATTRIBUTE_NODE:
// "The string-value of the attribute is replaced with a string
// corresponding to the new value."
aDataNode->SetNodeValue(aNodeValue);
break;
case nsIDOMNode::TEXT_NODE:
// "The text node is replaced with a new one corresponding to the new
// value".
{
nsCOMPtr<nsIDOMDocument> document;
aDataNode->GetOwnerDocument(getter_AddRefs(document));
if (!document)
break;
nsCOMPtr<nsIDOMText> textNode;
document->CreateTextNode(aNodeValue, getter_AddRefs(textNode));
if (!textNode)
break;
nsCOMPtr<nsIDOMNode> parentNode;
aDataNode->GetParentNode(getter_AddRefs(parentNode));
if (parentNode) {
nsCOMPtr<nsIDOMNode> childReturn;
parentNode->ReplaceChild(textNode, aDataNode,
getter_AddRefs(childReturn));
}
break;
}
case nsIDOMNode::ELEMENT_NODE:
{
// "If the element has any child text nodes, the first text node is
// replaced with one corresponding to the new value."
// Start by creating a text node for the new value.
nsCOMPtr<nsIDOMDocument> document;
aDataNode->GetOwnerDocument(getter_AddRefs(document));
if (!document)
break;
nsCOMPtr<nsIDOMText> textNode;
document->CreateTextNode(aNodeValue, getter_AddRefs(textNode));
if (!textNode)
break;
// Now find the first child text node.
nsCOMPtr<nsIDOMNodeList> childNodes;
aDataNode->GetChildNodes(getter_AddRefs(childNodes));
if (!childNodes)
break;
nsCOMPtr<nsIDOMNode> child, childReturn;
PRUint32 childCount;
childNodes->GetLength(&childCount);
for (PRUint32 i = 0; i < childCount; ++i) {
childNodes->Item(i, getter_AddRefs(child));
NS_ASSERTION(child, "DOMNodeList length is wrong!");
child->GetNodeType(&nodeType);
if (nodeType == nsIDOMNode::TEXT_NODE) {
// We found one, replace it with our new text node.
aDataNode->ReplaceChild(textNode, child,
getter_AddRefs(childReturn));
return;
}
}
// "If no child text nodes are present, a text node is created,
// corresponding to the new value, and appended as the first child node."
// XXX This is a bit vague since "appended as the first child node"
// implies that there are no child nodes at all, but all we've
// established is that there are no child _text_nodes.
// Taking this to mean "inserted as the first child node" until this is
// clarified.
aDataNode->GetFirstChild(getter_AddRefs(child));
if (child)
aDataNode->InsertBefore(textNode, child, getter_AddRefs(childReturn));
else
aDataNode->AppendChild(textNode, getter_AddRefs(childReturn));
}
break;
default:
NS_WARNING("Trying to set node value for unsupported node type");
}
}
/* static */ PRBool
nsXFormsUtils::GetSingleNodeBinding(nsIDOMElement* aElement,
nsIDOMNode** aNode,
nsIModelElementPrivate** aModel)
{
if (!aElement)
return PR_FALSE;
nsCOMPtr<nsIModelElementPrivate> model;
nsCOMPtr<nsIDOMXPathResult> result;
PRBool usesModelBind;
nsresult rv = EvaluateNodeBinding(aElement,
nsXFormsUtils::ELEMENT_WITH_MODEL_ATTR,
NS_LITERAL_STRING("ref"),
EmptyString(),
nsIDOMXPathResult::FIRST_ORDERED_NODE_TYPE,
getter_AddRefs(model),
getter_AddRefs(result),
&usesModelBind);
if (NS_FAILED(rv) || !result)
return PR_FALSE;
nsCOMPtr<nsIDOMNode> singleNode;
if (usesModelBind) {
result->SnapshotItem(0, getter_AddRefs(singleNode));
} else {
result->GetSingleNodeValue(getter_AddRefs(singleNode));
}
if (!singleNode)
return PR_FALSE;
singleNode.swap(*aNode);
if (aModel)
model.swap(*aModel); // transfers ref
return PR_TRUE;
}
///
/// @todo Use this consistently, or delete? (XXX)
/* static */ PRBool
nsXFormsUtils::GetSingleNodeBindingValue(nsIDOMElement* aElement,
nsString& aValue)
{
nsCOMPtr<nsIDOMNode> node;
if (GetSingleNodeBinding(aElement, getter_AddRefs(node), nsnull)) {
nsXFormsUtils::GetNodeValue(node, aValue);
return PR_TRUE;
}
return PR_FALSE;
}
/* static */ PRBool
nsXFormsUtils::SetSingleNodeBindingValue(nsIDOMElement *aElement,
const nsAString &aValue,
PRBool *aChanged)
{
*aChanged = PR_FALSE;
nsCOMPtr<nsIDOMNode> node;
nsCOMPtr<nsIModelElementPrivate> model;
if (GetSingleNodeBinding(aElement, getter_AddRefs(node),
getter_AddRefs(model)))
{
nsresult rv = model->SetNodeValue(node, aValue, aChanged);
if (NS_SUCCEEDED(rv))
return PR_TRUE;
}
return PR_FALSE;
}
/* static */ nsresult
nsXFormsUtils::DispatchEvent(nsIDOMNode* aTarget, nsXFormsEvent aEvent,
PRBool *aDefaultActionEnabled)
{
if (!aTarget)
return NS_ERROR_FAILURE;
nsCOMPtr<nsIXFormsControl> control = do_QueryInterface(aTarget);
if (control) {
switch (aEvent) {
case eEvent_Previous:
case eEvent_Next:
case eEvent_Focus:
case eEvent_Help:
case eEvent_Hint:
case eEvent_DOMActivate:
case eEvent_ValueChanged:
case eEvent_Valid:
case eEvent_Invalid:
case eEvent_DOMFocusIn:
case eEvent_DOMFocusOut:
case eEvent_Readonly:
case eEvent_Readwrite:
case eEvent_Required:
case eEvent_Optional:
case eEvent_Enabled:
case eEvent_Disabled:
case eEvent_InRange:
case eEvent_OutOfRange:
{
PRBool acceptableEventTarget = PR_FALSE;
control->IsEventTarget(&acceptableEventTarget);
if (!acceptableEventTarget) {
return NS_OK;
}
break;
}
default:
break;
}
}
nsCOMPtr<nsIDOMDocument> domDoc;
aTarget->GetOwnerDocument(getter_AddRefs(domDoc));
nsCOMPtr<nsIDOMDocumentEvent> doc = do_QueryInterface(domDoc);
NS_ENSURE_STATE(doc);
nsCOMPtr<nsIDOMEvent> event;
doc->CreateEvent(NS_LITERAL_STRING("Events"), getter_AddRefs(event));
NS_ENSURE_TRUE(event, NS_ERROR_OUT_OF_MEMORY);
const EventData *data = &sXFormsEventsEntries[aEvent];
event->InitEvent(NS_ConvertUTF8toUTF16(data->name),
data->canBubble, data->canCancel);
nsCOMPtr<nsIDOMEventTarget> target = do_QueryInterface(aTarget);
NS_ENSURE_STATE(target);
SetEventTrusted(event, aTarget);
PRBool defaultActionEnabled = PR_TRUE;
nsresult rv = target->DispatchEvent(event, &defaultActionEnabled);
if (NS_SUCCEEDED(rv) && aDefaultActionEnabled)
*aDefaultActionEnabled = defaultActionEnabled;
return rv;
}
/* static */ nsresult
nsXFormsUtils::SetEventTrusted(nsIDOMEvent* aEvent, nsIDOMNode* aRelatedNode)
{
nsCOMPtr<nsIDOMNSEvent> event(do_QueryInterface(aEvent));
if (event) {
PRBool isTrusted = PR_FALSE;
event->GetIsTrusted(&isTrusted);
if (!isTrusted && aRelatedNode) {
nsCOMPtr<nsIDOMDocument> domDoc;
aRelatedNode->GetOwnerDocument(getter_AddRefs(domDoc));
nsCOMPtr<nsIDocument> doc(do_QueryInterface(domDoc));
if (doc) {
nsIURI* uri = doc->GetDocumentURI();
if (uri) {
PRBool isChrome = PR_FALSE;
uri->SchemeIs("chrome", &isChrome);
if (isChrome) {
nsCOMPtr<nsIPrivateDOMEvent> privateEvent(do_QueryInterface(aEvent));
NS_ENSURE_STATE(privateEvent);
privateEvent->SetTrusted(PR_TRUE);
}
}
}
}
}
return NS_OK;
}
/* static */ PRBool
nsXFormsUtils::EventHandlingAllowed(nsIDOMEvent* aEvent, nsIDOMNode* aTarget)
{
PRBool allow = PR_FALSE;
if (aEvent && aTarget) {
nsCOMPtr<nsIDOMNSEvent> related(do_QueryInterface(aEvent));
if (related) {
PRBool isTrusted = PR_FALSE;
if (NS_SUCCEEDED(related->GetIsTrusted(&isTrusted))) {
if (isTrusted) {
allow = PR_TRUE;
} else {
nsCOMPtr<nsIDOMDocument> domDoc;
aTarget->GetOwnerDocument(getter_AddRefs(domDoc));
nsCOMPtr<nsIDocument> doc(do_QueryInterface(domDoc));
if (doc) {
nsIURI* uri = doc->GetDocumentURI();
if (uri) {
PRBool isChrome = PR_FALSE;
uri->SchemeIs("chrome", &isChrome);
allow = !isChrome;
}
}
}
}
}
}
NS_ASSERTION(allow, "Event handling not allowed!");
return allow;
}
/* static */ PRBool
nsXFormsUtils::IsXFormsEvent(const nsAString& aEvent,
PRBool& aCancelable,
PRBool& aBubbles)
{
PRUint32 flag = 0;
if (!sXFormsEvents.Get(aEvent, &flag))
return PR_FALSE;
aCancelable = (flag & CANCELABLE) ? PR_TRUE : PR_FALSE;
aBubbles = (flag & BUBBLES) ? PR_TRUE : PR_FALSE;
return PR_TRUE;
}
/* static */ void
nsXFormsUtils::GetEventDefaults(const nsAString& aEvent,
PRBool& aCancelable,
PRBool& aBubbles)
{
PRUint32 flag = 0;
if (!sEventDefaults.Get(aEvent, &flag))
return;
aCancelable = (flag & CANCELABLE) ? PR_TRUE : PR_FALSE;
aBubbles = (flag & BUBBLES) ? PR_TRUE : PR_FALSE;
}
/* static */ nsresult
nsXFormsUtils::CloneScriptingInterfaces(const nsIID *aIIDList,
unsigned int aIIDCount,
PRUint32 *aOutCount,
nsIID ***aOutArray)
{
nsIID **iids = NS_STATIC_CAST(nsIID**,
nsMemory::Alloc(aIIDCount * sizeof(nsIID*)));
if (!iids) {
return NS_ERROR_OUT_OF_MEMORY;
}
for (PRUint32 i = 0; i < aIIDCount; ++i) {
iids[i] = NS_STATIC_CAST(nsIID*,
nsMemory::Clone(&aIIDList[i], sizeof(nsIID)));
if (!iids[i]) {
for (PRUint32 j = 0; j < i; ++j)
nsMemory::Free(iids[j]);
nsMemory::Free(iids);
return NS_ERROR_OUT_OF_MEMORY;
}
}
*aOutArray = iids;
*aOutCount = aIIDCount;
return NS_OK;
}
/* static */ nsresult
nsXFormsUtils::FindParentContext(nsIDOMElement *aElement,
nsIModelElementPrivate **aModel,
nsIXFormsControl **aParentControl,
nsIDOMNode **aContextNode,
PRInt32 *aContextPosition,
PRInt32 *aContextSize)
{
NS_ENSURE_ARG(aElement);
NS_ENSURE_ARG_POINTER(aModel);
NS_ENSURE_ARG_POINTER(aContextNode);
nsCOMPtr<nsIDOMNode> curNode;
nsresult rv = aElement->GetParentNode(getter_AddRefs(curNode));
NS_ENSURE_SUCCESS(rv, NS_OK);
// If a model is set, get its ID
nsAutoString childModelID;
if (*aModel) {
nsCOMPtr<nsIDOMElement> modelElement = do_QueryInterface(*aModel);
NS_ENSURE_TRUE(modelElement, NS_ERROR_FAILURE);
modelElement->GetAttribute(NS_LITERAL_STRING("id"), childModelID);
}
// Find our context:
// Iterate over all parents and find first one that implements nsIXFormsContextControl,
// and has the same model as us.
nsCOMPtr<nsIDOMNode> temp;
nsAutoString contextModelID;
while (curNode) {
nsCOMPtr<nsIXFormsContextControl> contextControl = do_QueryInterface(curNode);
if (contextControl) {
PRInt32 cSize;
PRInt32 cPosition;
nsCOMPtr<nsIDOMNode> tempNode;
rv = contextControl->GetContext(contextModelID,
getter_AddRefs(tempNode),
&cPosition,
&cSize);
NS_ENSURE_SUCCESS(rv, rv);
// If the call failed, it means that we _have_ a parent which sets the
// context but it is invalid, ie. the XPath expression could have
// generated an error.
if (tempNode && (childModelID.IsEmpty()
|| childModelID.Equals(contextModelID))) {
NS_ADDREF(*aContextNode = tempNode);
if (aContextSize)
*aContextSize = cSize;
if (aContextPosition)
*aContextPosition = cPosition;
// We QI from nsIXFormsContextControl to nsIXFormsControl here. This
// will always suceed when needed, as the only element not
// implementing both is the model element, and no children of model
// need to register with the model (which is what aParentControl is
// needed for).
if (aParentControl) {
CallQueryInterface(contextControl, aParentControl); // addrefs
}
break;
}
}
// Next ancestor
temp.swap(curNode);
rv = temp->GetParentNode(getter_AddRefs(curNode));
NS_ENSURE_SUCCESS(rv, NS_OK);
}
// Child had no model set, set it
if (!*aModel) {
nsCOMPtr<nsIDOMDocument> domDoc;
nsresult rv = aElement->GetOwnerDocument(getter_AddRefs(domDoc));
NS_ENSURE_SUCCESS(rv, rv);
NS_ENSURE_TRUE(domDoc, NS_ERROR_FAILURE);
nsCOMPtr<nsIModelElementPrivate> model;
if (!*aContextNode || contextModelID.IsEmpty()) {
// We have either not found a context node, or we have found one where
// the model ID is empty. That means we use the first model in document
nsCOMPtr<nsIDOMNodeList> nodes;
domDoc->GetElementsByTagNameNS(NS_LITERAL_STRING(NS_NAMESPACE_XFORMS),
NS_LITERAL_STRING("model"),
getter_AddRefs(nodes));
// No model element in document!
NS_ENSURE_STATE(nodes);
nsCOMPtr<nsIDOMNode> modelNode;
nodes->Item(0, getter_AddRefs(modelNode));
model = do_QueryInterface(modelNode);
} else {
// Get the model with the correct ID
nsCOMPtr<nsIDOMElement> modelElement;
domDoc->GetElementById(contextModelID, getter_AddRefs(modelElement));
model = do_QueryInterface(modelElement);
}
if (!model) {
nsXFormsUtils::ReportError(NS_LITERAL_STRING("noModelError"), aElement);
DispatchEvent(aElement, eEvent_BindingException);
return NS_ERROR_ABORT;
}
NS_ADDREF(*aModel = model);
}
return NS_OK;
}
/* static */ PRBool
nsXFormsUtils::CheckSameOrigin(nsIDocument *aBaseDocument, nsIURI *aTestURI)
{
nsresult rv;
// get the base document's principal
nsIPrincipal *basePrincipal = aBaseDocument->GetNodePrincipal();
if (basePrincipal) {
// check for the UniversalBrowserRead capability.
PRBool crossSiteAccessEnabled;
rv = basePrincipal->IsCapabilityEnabled("UniversalBrowserRead", nsnull,
&crossSiteAccessEnabled);
if (NS_SUCCEEDED(rv) && crossSiteAccessEnabled)
return PR_TRUE;
// check the security manager and do a same original check on the principal
nsCOMPtr<nsIScriptSecurityManager> secMan =
do_GetService(NS_SCRIPTSECURITYMANAGER_CONTRACTID);
if (secMan) {
// get a principal for the uri we are testing
nsCOMPtr<nsIPrincipal> testPrincipal;
rv = secMan->GetCodebasePrincipal(aTestURI, getter_AddRefs(testPrincipal));
if (NS_SUCCEEDED(rv)) {
rv = secMan->CheckSameOriginPrincipal(basePrincipal, testPrincipal);
if (NS_SUCCEEDED(rv))
return PR_TRUE;
}
}
}
// else, check with the permission manager to see if this host is
// permitted to access sites from other domains.
nsCOMPtr<nsIPermissionManager> permMgr =
do_GetService(NS_PERMISSIONMANAGER_CONTRACTID);
NS_ENSURE_TRUE(permMgr, PR_FALSE);
nsCOMPtr<nsIURI> principalURI;
rv = basePrincipal->GetURI(getter_AddRefs(principalURI));
if (NS_SUCCEEDED(rv)) {
PRUint32 perm;
rv = permMgr->TestPermission(principalURI, "xforms-load", &perm);
if (NS_SUCCEEDED(rv) && perm == nsIPermissionManager::ALLOW_ACTION)
return PR_TRUE;
}
return PR_FALSE;
}
/*static*/ PRBool
nsXFormsUtils::IsXFormsElement(nsIDOMNode* aNode, const nsAString& aName)
{
if (aNode) {
PRUint16 nodeType;
aNode->GetNodeType(&nodeType);
if (nodeType == nsIDOMNode::ELEMENT_NODE) {
nsAutoString name;
aNode->GetLocalName(name);
if (name.Equals(aName)) {
nsAutoString ns;
aNode->GetNamespaceURI(ns);
if (ns.EqualsLiteral(NS_NAMESPACE_XFORMS))
return PR_TRUE;
}
}
}
return PR_FALSE;
}
/* static */ PRBool
nsXFormsUtils::IsLabelElement(nsIDOMNode *aElement)
{
nsAutoString value;
aElement->GetLocalName(value);
if (value.EqualsLiteral("label")) {
aElement->GetNamespaceURI(value);
return value.EqualsLiteral(NS_NAMESPACE_XFORMS);
}
return PR_FALSE;
}
/* static */ PRBool
nsXFormsUtils::FocusControl(nsIDOMElement *aElement)
{
PRBool ret = PR_FALSE;
nsCOMPtr<nsIDOMNSHTMLElement> element(do_QueryInterface(aElement));
if (element && NS_SUCCEEDED(element->Focus()))
ret = PR_TRUE;
return ret;
}
int
sortFunc(nsIDOMNode *aNode1, nsIDOMNode *aNode2, void *aArg)
{
return (void*) aNode1 > (void*) aNode2;
}
/* static */ void
nsXFormsUtils::MakeUniqueAndSort(nsCOMArray<nsIDOMNode> *aArray)
{
if (!aArray)
return;
aArray->Sort(sortFunc, nsnull);
PRInt32 pos = 0;
while (pos + 1 < aArray->Count()) {
if (aArray->ObjectAt(pos) == aArray->ObjectAt(pos + 1)) {
aArray->RemoveObjectAt(pos + 1);
} else {
++pos;
}
}
}
/* static */ nsresult
nsXFormsUtils::GetInstanceNodeForData(nsIDOMNode *aInstanceDataNode,
nsIDOMNode **aInstanceNode)
{
NS_ENSURE_ARG(aInstanceDataNode);
NS_ENSURE_ARG_POINTER(aInstanceNode);
*aInstanceNode = nsnull;
nsCOMPtr<nsIDOMDocument> instanceDOMDoc;
aInstanceDataNode->GetOwnerDocument(getter_AddRefs(instanceDOMDoc));
// owner doc is null when the data node is the document (e.g., ref="/")
if (!instanceDOMDoc) {
instanceDOMDoc = do_QueryInterface(aInstanceDataNode);
}
nsCOMPtr<nsIDocument> instanceDoc(do_QueryInterface(instanceDOMDoc));
NS_ENSURE_TRUE(instanceDoc, NS_ERROR_UNEXPECTED);
nsISupports* owner =
NS_STATIC_CAST(
nsISupports*,
instanceDoc->GetProperty(nsXFormsAtoms::instanceDocumentOwner));
nsCOMPtr<nsIDOMNode> instanceNode(do_QueryInterface(owner));
if (instanceNode) {
NS_ADDREF(*aInstanceNode = instanceNode);
return NS_OK;
}
// Two possibilities. No instance nodes in model (which should never happen)
// or instance node not found.
return NS_ERROR_ABORT;
}
/* static */ nsresult
nsXFormsUtils::ParseTypeFromNode(nsIDOMNode *aInstanceData,
nsAString &aType,
nsAString &aNSUri)
{
nsresult rv;
// Find the model for the instance data node
nsCOMPtr<nsIDOMNode> instanceNode;
rv = nsXFormsUtils::GetInstanceNodeForData(aInstanceData,
getter_AddRefs(instanceNode));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIDOMNode> modelNode;
rv = instanceNode->GetParentNode(getter_AddRefs(modelNode));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIModelElementPrivate> model(do_QueryInterface(modelNode));
NS_ENSURE_STATE(model);
return model->GetTypeFromNode(aInstanceData, aType, aNSUri);
}
/* static */ void
nsXFormsUtils::ReportError(const nsString& aMessageName, const PRUnichar **aParams,
PRUint32 aParamLength, nsIDOMNode *aElement,
nsIDOMNode *aContext, PRUint32 aErrorFlag)
{
nsCOMPtr<nsIScriptError> errorObject =
do_CreateInstance("@mozilla.org/scripterror;1");
nsCOMPtr<nsIConsoleService> consoleService =
do_GetService(NS_CONSOLESERVICE_CONTRACTID);
nsCOMPtr<nsIStringBundleService> bundleService =
do_GetService(NS_STRINGBUNDLE_CONTRACTID);
if (!(consoleService && errorObject && bundleService))
return;
nsAutoString msg, srcFile, srcLine;
// get the string from the bundle (xforms.properties)
nsCOMPtr<nsIStringBundle> bundle;
bundleService->CreateBundle("chrome://xforms/locale/xforms.properties",
getter_AddRefs(bundle));
nsXPIDLString message;
if (aParams) {
bundle->FormatStringFromName(aMessageName.get(), aParams, aParamLength,
getter_Copies(message));
msg.Append(message);
} else {
bundle->GetStringFromName(aMessageName.get(),
getter_Copies(message));
msg.Append(message);
}
if (msg.IsEmpty()) {
#ifdef DEBUG
printf("nsXFormsUtils::ReportError() Failed to get message string for message id '%s'!\n",
NS_ConvertUTF16toUTF8(aMessageName).get());
#endif
return;
}
// if a context was defined, serialize it and append to the message.
if (aContext) {
nsCOMPtr<nsIDOMElement> element(do_QueryInterface(aContext));
if (element) {
srcLine.AppendLiteral("<");
}
// For other than element nodes nodeName should be enough.
nsAutoString tmp;
aContext->GetNodeName(tmp);
srcLine.Append(tmp);
if (element) {
nsCOMPtr<nsIDOMNamedNodeMap> attrs;
element->GetAttributes(getter_AddRefs(attrs));
if (attrs) {
PRUint32 len = 0;
attrs->GetLength(&len);
for (PRUint32 i = 0; i < len; ++i) {
nsCOMPtr<nsIDOMNode> attr;
attrs->Item(i, getter_AddRefs(attr));
if (attr) {
srcLine.AppendLiteral(" ");
attr->GetNodeName(tmp);
srcLine.Append(tmp);
srcLine.AppendLiteral("=\"");
attr->GetNodeValue(tmp);
srcLine.Append(tmp);
srcLine.AppendLiteral("\"");
}
}
}
srcLine.AppendLiteral("/>");
}
}
// if aElement is defined, we use it to figure out the location of the file
// that caused the error.
if (aElement) {
nsCOMPtr<nsIDOMDocument> domDoc;
aElement->GetOwnerDocument(getter_AddRefs(domDoc));
if (domDoc) {
nsCOMPtr<nsIDOMNSDocument> nsDoc(do_QueryInterface(domDoc));
if (nsDoc) {
nsCOMPtr<nsIDOMLocation> domLoc;
nsDoc->GetLocation(getter_AddRefs(domLoc));
if (domLoc) {
nsAutoString location;
domLoc->GetHref(srcFile);
}
}
}
}
// Log the message to JavaScript Console
#ifdef DEBUG
printf("ERR: %s\n", NS_ConvertUTF16toUTF8(msg).get());
#endif
nsresult rv = errorObject->Init(msg.get(), srcFile.get(), srcLine.get(),
0, 0, aErrorFlag, "XForms");
if (NS_SUCCEEDED(rv)) {
consoleService->LogMessage(errorObject);
}
}
/* static */ PRBool
nsXFormsUtils::IsDocumentReadyForBind(nsIDOMDocument *aDocument)
{
NS_ENSURE_ARG(aDocument);
nsCOMPtr<nsIDocument> doc = do_QueryInterface(aDocument);
nsIDocument *test = NS_STATIC_CAST(nsIDocument *,
doc->GetProperty(nsXFormsAtoms::readyForBindProperty));
return test ? PR_TRUE : PR_FALSE;
}
/**
* Find the repeat context for an element: Returns a parent repeat or
* contextcontainer (depending on |aFindContainer|).
*
* @param aElement The element to retrieve context for
* @param aFindContainer find true: "contextcontainer", false: "repeat"
* @return The repeat or contextcontainer node
*/
already_AddRefed<nsIDOMNode>
FindRepeatContext(nsIDOMElement *aElement, PRBool aFindContainer)
{
nsIDOMNode *result = nsnull;
// XXX Possibly use mRepeatState functionality from nsXFormsDelegateStub to
// save running up the tree?
nsCOMPtr<nsIDOMNode> context, temp;
aElement->GetParentNode(getter_AddRefs(context));
nsresult rv = NS_OK;
while (context) {
if (nsXFormsUtils::IsXFormsElement(context,
aFindContainer ?
NS_LITERAL_STRING("contextcontainer") :
NS_LITERAL_STRING("repeat"))) {
break;
}
temp.swap(context);
rv = temp->GetParentNode(getter_AddRefs(context));
}
if (context && NS_SUCCEEDED(rv)) {
NS_ADDREF(result = context);
}
return result;
}
/* static */
nsresult
nsXFormsUtils::GetElementById(nsIDOMDocument *aDoc,
const nsAString &aId,
const PRBool aOnlyXForms,
nsIDOMElement *aCaller,
nsIDOMElement **aElement)
{
NS_ENSURE_TRUE(!aId.IsEmpty(), NS_ERROR_INVALID_ARG);
NS_ENSURE_ARG_POINTER(aDoc);
NS_ENSURE_ARG_POINTER(aElement);
*aElement = nsnull;
nsCOMPtr<nsIDOMElement> element;
aDoc->GetElementById(aId, getter_AddRefs(element));
if (!element)
return NS_OK;
// Check whether the element is inside a repeat. If it is, find the cloned
// element for the currently selected row.
nsCOMPtr<nsIDOMNode> repeat = FindRepeatContext(element, PR_FALSE);
if (!repeat) {
// Element not inside a repeat, just return the element (eventually
// checking for XForms namespace)
if (aOnlyXForms) {
nsAutoString ns;
element->GetNamespaceURI(ns);
if (!ns.EqualsLiteral(NS_NAMESPACE_XFORMS)) {
return NS_OK;
}
}
NS_ADDREF(*aElement = element);
return NS_OK;
}
// Check whether the caller is inside a repeat
nsCOMPtr<nsIDOMNode> repeatRow;
if (aCaller) {
repeatRow = FindRepeatContext(aCaller, PR_TRUE);
}
if (!repeatRow) {
// aCaller was either not set or not inside a repeat, used currently
// focused row of the element's repeat
nsCOMPtr<nsIXFormsRepeatElement> repeatInt(do_QueryInterface(repeat));
NS_ENSURE_STATE(repeatInt);
repeatInt->GetCurrentRepeatRow(getter_AddRefs(repeatRow));
NS_ASSERTION(repeatRow, "huh? No currently selected repeat row?");
}
nsCOMPtr<nsIDOMElement> rowElement(do_QueryInterface(repeatRow));
NS_ENSURE_STATE(rowElement);
nsCOMPtr<nsIDOMDocument> repeatDoc;
rowElement->GetOwnerDocument(getter_AddRefs(repeatDoc));
nsCOMPtr<nsIDOMNodeList> descendants;
nsresult rv;
rv = rowElement->GetElementsByTagNameNS(aOnlyXForms ?
NS_LITERAL_STRING(NS_NAMESPACE_XFORMS) :
NS_LITERAL_STRING("*"),
NS_LITERAL_STRING("*"),
getter_AddRefs(descendants));
NS_ENSURE_SUCCESS(rv, rv);
NS_ENSURE_STATE(descendants);
PRUint32 elements;
descendants->GetLength(&elements);
if (!elements) {
return NS_OK;
}
PRUint32 i;
PRUint16 type;
nsCOMPtr<nsIDOMNode> childNode;
for (i = 0; i < elements; ++i) {
descendants->Item(i, getter_AddRefs(childNode));
childNode->GetNodeType(&type);
if (type == nsIDOMNode::ELEMENT_NODE) {
nsCOMPtr<nsIContent> content(do_QueryInterface(childNode));
NS_ASSERTION(content, "An ELEMENT_NODE not implementing nsIContent?!");
if (content->AttrValueIs(kNameSpaceID_None, content->GetIDAttributeName(),
aId, eCaseMatters)) {
element = do_QueryInterface(childNode);
break;
}
}
}
if (i == elements) {
return NS_OK;
}
NS_ENSURE_STATE(element);
NS_ADDREF(*aElement = element);
return NS_OK;
}
/* static */
PRBool
nsXFormsUtils::HandleFatalError(nsIDOMElement *aElement,
const nsAString &aName)
{
if (!aElement) {
return PR_FALSE;
}
nsCOMPtr<nsIDOMDocument> doc;
aElement->GetOwnerDocument(getter_AddRefs(doc));
nsCOMPtr<nsIDocument> iDoc(do_QueryInterface(doc));
if (!iDoc) {
return PR_FALSE;
}
// check for fatalError property, enforcing that only one fatal error will
// be shown to the user
if (iDoc->GetProperty(nsXFormsAtoms::fatalError)) {
return PR_FALSE;
}
iDoc->SetProperty(nsXFormsAtoms::fatalError, iDoc);
// Check for preference, disabling this popup
PRBool disablePopup = PR_FALSE;
nsresult rv;
nsCOMPtr<nsIPrefBranch> pref = do_GetService(NS_PREFSERVICE_CONTRACTID, &rv);
if (NS_SUCCEEDED(rv) && pref) {
PRBool val;
if (NS_SUCCEEDED(pref->GetBoolPref("xforms.disablePopup", &val)))
disablePopup = val;
}
if (disablePopup)
return PR_FALSE;
// Get nsIDOMWindowInternal
nsCOMPtr<nsIDOMWindowInternal> internal;
rv = nsXFormsUtils::GetWindowFromDocument(doc, getter_AddRefs(internal));
if (NS_FAILED(rv) || !internal) {
return PR_FALSE;
}
// Show popup
nsCOMPtr<nsIDOMWindow> messageWindow;
rv = internal->OpenDialog(NS_LITERAL_STRING("chrome://xforms/content/bindingex.xul"),
aName,
NS_LITERAL_STRING("modal,dialog,chrome,dependent"),
nsnull,
getter_AddRefs(messageWindow));
return NS_SUCCEEDED(rv);
}
/* static */
PRBool
nsXFormsUtils::AreEntitiesEqual(nsIDOMNamedNodeMap *aEntities1,
nsIDOMNamedNodeMap *aEntities2)
{
if (!aEntities1 && !aEntities2) {
return PR_TRUE;
}
if (!aEntities1 || !aEntities2) {
return PR_FALSE;
}
PRUint32 entLength1, entLength2;
nsresult rv1 = aEntities1->GetLength(&entLength1);
nsresult rv2 = aEntities2->GetLength(&entLength2);
if (NS_FAILED(rv1) || NS_FAILED(rv2) || entLength1 != entLength2) {
return PR_FALSE;
}
nsAutoString buffer1, buffer2;
for (PRUint32 i = 0; i < entLength1; ++i) {
nsCOMPtr<nsIDOMNode> entNode1, entNode2;
rv1 = aEntities1->Item(i, getter_AddRefs(entNode1));
rv2 = aEntities2->Item(i, getter_AddRefs(entNode2));
if (NS_FAILED(rv1) || NS_FAILED(rv2) || !entNode1 || !entNode2) {
return PR_FALSE;
}
nsCOMPtr<nsIDOMEntity> ent1, ent2;
ent1 = do_QueryInterface(entNode1);
ent2 = do_QueryInterface(entNode2);
if (!ent1 || !ent2) {
return PR_FALSE;
}
rv1 = ent1->GetPublicId(buffer1);
rv2 = ent2->GetPublicId(buffer2);
if (NS_FAILED(rv1) || NS_FAILED(rv2) || !buffer1.Equals(buffer2)) {
return PR_FALSE;
}
rv1 = ent1->GetSystemId(buffer1);
rv2 = ent2->GetSystemId(buffer2);
if (NS_FAILED(rv1) || NS_FAILED(rv2) || !buffer1.Equals(buffer2)) {
return PR_FALSE;
}
rv1 = ent1->GetNotationName(buffer1);
rv2 = ent2->GetNotationName(buffer2);
if (NS_FAILED(rv1) || NS_FAILED(rv2) || !buffer1.Equals(buffer2)) {
return PR_FALSE;
}
// XXX: These will need to be uncommented when Mozilla supports these from
// DOM3
#if 0
rv1 = ent1->GetInputEncoding(buffer1);
rv2 = ent2->GetInputEncoding(buffer2);
if (NS_FAILED(rv1) || NS_FAILED(rv2) || !buffer1.Equals(buffer2)) {
return PR_FALSE;
}
rv1 = ent1->GetXmlEncoding(buffer1);
rv2 = ent2->GetXmlEncoding(buffer2);
if (NS_FAILED(rv1) || NS_FAILED(rv2) || !buffer1.Equals(buffer2)) {
return PR_FALSE;
}
rv1 = ent1->GetXmlVersion(buffer1);
rv2 = ent2->GetXmlVersion(buffer2);
if (NS_FAILED(rv1) || NS_FAILED(rv2) || !buffer1.Equals(buffer2)) {
return PR_FALSE;
}
#endif
}
return PR_TRUE;
}
/* static */ PRBool
nsXFormsUtils::AreNotationsEqual(nsIDOMNamedNodeMap *aNotations1,
nsIDOMNamedNodeMap *aNotations2)
{
if (!aNotations1 && !aNotations2) {
return PR_TRUE;
}
if (!aNotations1 || !aNotations2) {
return PR_FALSE;
}
PRUint32 notLength1, notLength2;
nsresult rv1 = aNotations1->GetLength(&notLength1);
nsresult rv2 = aNotations2->GetLength(&notLength2);
if (NS_FAILED(rv1) || NS_FAILED(rv2) || notLength1 != notLength2) {
return PR_FALSE;
}
nsAutoString buffer1, buffer2;
for (PRUint32 j = 0; j < notLength1; ++j) {
nsCOMPtr<nsIDOMNode> notNode1, notNode2;
rv1 = aNotations1->Item(j, getter_AddRefs(notNode1));
rv2 = aNotations2->Item(j, getter_AddRefs(notNode2));
if (NS_FAILED(rv1) || NS_FAILED(rv2) || !notNode1 || !notNode2) {
return PR_FALSE;
}
nsCOMPtr<nsIDOMNotation> notation1, notation2;
notation1 = do_QueryInterface(notNode1);
notation2 = do_QueryInterface(notNode2);
if (!notation1 || !notation2) {
return PR_FALSE;
}
rv1 = notation1->GetPublicId(buffer1);
rv2 = notation2->GetPublicId(buffer2);
if (NS_FAILED(rv1) || NS_FAILED(rv2) || !buffer1.Equals(buffer2)) {
return PR_FALSE;
}
rv1 = notation1->GetSystemId(buffer1);
rv2 = notation2->GetSystemId(buffer2);
if (NS_FAILED(rv1) || NS_FAILED(rv2) || !buffer1.Equals(buffer2)) {
return PR_FALSE;
}
}
return PR_TRUE;
}
/* static */ PRBool
nsXFormsUtils::AreNodesEqual(nsIDOMNode *aFirstNode, nsIDOMNode *aSecondNode,
PRBool aAlreadyNormalized)
{
if (!aFirstNode || !aSecondNode) {
return PR_FALSE;
}
nsresult rv1, rv2;
PRUint16 firstType, secondType;
rv1 = aFirstNode->GetNodeType(&firstType);
rv2 = aSecondNode->GetNodeType(&secondType);
if (NS_FAILED(rv1) || NS_FAILED(rv2) || firstType != secondType) {
return PR_FALSE;
}
nsAutoString buffer1, buffer2;
if (firstType == nsIDOMNode::DOCUMENT_TYPE_NODE) {
nsCOMPtr<nsIDOMDocumentType> doc1 = do_QueryInterface(aFirstNode);
nsCOMPtr<nsIDOMDocumentType> doc2 = do_QueryInterface(aSecondNode);
if (!doc1 || !doc2) {
return PR_FALSE;
}
rv1 = doc1->GetName(buffer1);
rv2 = doc2->GetName(buffer2);
if (NS_FAILED(rv1) || NS_FAILED(rv2) || !buffer1.Equals(buffer2)) {
return PR_FALSE;
}
rv1 = doc1->GetPublicId(buffer1);
rv2 = doc2->GetPublicId(buffer2);
if (NS_FAILED(rv1) || NS_FAILED(rv2) || !buffer1.Equals(buffer2)) {
return PR_FALSE;
}
rv1 = doc1->GetSystemId(buffer1);
rv2 = doc2->GetSystemId(buffer2);
if (NS_FAILED(rv1) || NS_FAILED(rv2) || !buffer1.Equals(buffer2)) {
return PR_FALSE;
}
rv1 = doc1->GetInternalSubset(buffer1);
rv2 = doc2->GetInternalSubset(buffer2);
if (NS_FAILED(rv1) || NS_FAILED(rv2) || !buffer1.Equals(buffer2)) {
return PR_FALSE;
}
nsCOMPtr<nsIDOMNamedNodeMap> map1, map2;
rv1 = doc1->GetEntities(getter_AddRefs(map1));
rv2 = doc2->GetEntities(getter_AddRefs(map2));
// XXX need to handle the case where neither has entities?
if (NS_FAILED(rv1) || NS_FAILED(rv2)) {
return PR_FALSE;
}
PRBool equal = nsXFormsUtils::AreEntitiesEqual(map1, map2);
if (!equal) {
return PR_FALSE;
}
rv1 = doc1->GetNotations(getter_AddRefs(map1));
rv2 = doc2->GetNotations(getter_AddRefs(map2));
if (NS_FAILED(rv1) || NS_FAILED(rv2)) {
return PR_FALSE;
}
equal = nsXFormsUtils::AreNotationsEqual(map1, map2);
if (!equal) {
return PR_FALSE;
}
}
rv1 = aFirstNode->GetNodeName(buffer1);
rv2 = aSecondNode->GetNodeName(buffer2);
if (NS_FAILED(rv1) || NS_FAILED(rv2) || !buffer1.Equals(buffer2)) {
return PR_FALSE;
}
rv1 = aFirstNode->GetLocalName(buffer1);
rv2 = aSecondNode->GetLocalName(buffer2);
if (NS_FAILED(rv1) || NS_FAILED(rv2) || !buffer1.Equals(buffer2)) {
return PR_FALSE;
}
rv1 = aFirstNode->GetNamespaceURI(buffer1);
rv2 = aSecondNode->GetNamespaceURI(buffer2);
if (NS_FAILED(rv1) || NS_FAILED(rv2) || !buffer1.Equals(buffer2)) {
return PR_FALSE;
}
rv1 = aFirstNode->GetPrefix(buffer1);
rv2 = aSecondNode->GetPrefix(buffer2);
if (NS_FAILED(rv1) || NS_FAILED(rv2) || !buffer1.Equals(buffer2)) {
return PR_FALSE;
}
rv1 = aFirstNode->GetNodeValue(buffer1);
rv2 = aSecondNode->GetNodeValue(buffer2);
if (NS_FAILED(rv1) || NS_FAILED(rv2) || !buffer1.Equals(buffer2)) {
return PR_FALSE;
}
PRBool hasAttr1, hasAttr2;
rv1 = aFirstNode->HasAttributes(&hasAttr1);
rv2 = aSecondNode->HasAttributes(&hasAttr2);
if (NS_FAILED(rv1) || NS_FAILED(rv2) || hasAttr1 != hasAttr2) {
return PR_FALSE;
}
if (hasAttr1) {
nsCOMPtr<nsIDOMNamedNodeMap> attrs1, attrs2;
PRUint32 attrLength1, attrLength2;
rv1 = aFirstNode->GetAttributes(getter_AddRefs(attrs1));
rv2 = aSecondNode->GetAttributes(getter_AddRefs(attrs2));
if (NS_FAILED(rv1) || NS_FAILED(rv2)) {
return PR_FALSE;
}
rv1 = attrs1->GetLength(&attrLength1);
rv2 = attrs2->GetLength(&attrLength2);
if (NS_FAILED(rv1) || NS_FAILED(rv2) || attrLength1 != attrLength2) {
return PR_FALSE;
}
// the order of the attributes on the two nodes doesn't matter. But
// every attribute on node1 must exist on node2 (and no more)
for (PRUint32 i = 0; i < attrLength1; ++i) {
nsCOMPtr<nsIDOMNode> attr1, attr2;
rv1 = attrs1->Item(i, getter_AddRefs(attr1));
if (!attr1) {
return PR_FALSE;
}
attr1->GetLocalName(buffer1);
attr1->GetNamespaceURI(buffer2);
attrs2->GetNamedItemNS(buffer2, buffer1, getter_AddRefs(attr2));
if (!attr2) {
return PR_FALSE;
}
rv1 = attr1->GetNodeValue(buffer1);
rv2 = attr2->GetNodeValue(buffer2);
if (NS_FAILED(rv1) || NS_FAILED(rv2) || !buffer1.Equals(buffer2)) {
return PR_FALSE;
}
}
}
// now looking at the child nodes. They have to be 'equal' and at the same
// index inside each of the parent nodes.
PRBool hasChildren1, hasChildren2;
rv1 = aFirstNode->HasChildNodes(&hasChildren1);
rv2 = aSecondNode->HasChildNodes(&hasChildren2);
if (NS_FAILED(rv1) || NS_FAILED(rv2) || hasChildren1 != hasChildren2) {
return PR_FALSE;
}
if (hasChildren1) {
nsCOMPtr<nsIDOMNodeList> children1, children2;
PRUint32 childrenLength1, childrenLength2;
rv1 = aFirstNode->GetChildNodes(getter_AddRefs(children1));
rv2 = aSecondNode->GetChildNodes(getter_AddRefs(children2));
if (NS_FAILED(rv1) || NS_FAILED(rv2) || !children1 || !children2) {
return PR_FALSE;
}
rv1 = children1->GetLength(&childrenLength1);
rv2 = children2->GetLength(&childrenLength2);
if (NS_FAILED(rv1) || NS_FAILED(rv2) || childrenLength1 != childrenLength2) {
return PR_FALSE;
}
nsCOMPtr<nsIDOMNode> clone1, clone2;
if (!aAlreadyNormalized) {
// well we avoided this as long as we can. If we haven't already
// normalized all children, now is the time to do it. We'll have to clone
// nodes since the normalization process actually changes the DOM.
rv1 = aFirstNode->CloneNode(PR_TRUE, getter_AddRefs(clone1));
if (NS_FAILED(rv1) || !clone1) {
return PR_FALSE;
}
rv2 = aSecondNode->CloneNode(PR_TRUE, getter_AddRefs(clone2));
if (NS_FAILED(rv2) || !clone2) {
return PR_FALSE;
}
rv1 = clone1->Normalize();
rv2 = clone2->Normalize();
if (NS_FAILED(rv1) || NS_FAILED(rv2)) {
return PR_FALSE;
}
// since this already worked once on the original nodes, won't bother
// checking the results for the clones
clone1->GetChildNodes(getter_AddRefs(children1));
clone2->GetChildNodes(getter_AddRefs(children2));
// get length again since normalizing may have eliminated some text nodes
rv1 = children1->GetLength(&childrenLength1);
rv2 = children2->GetLength(&childrenLength2);
if (NS_FAILED(rv1) || NS_FAILED(rv2) || childrenLength1 != childrenLength2) {
return PR_FALSE;
}
}
for (PRUint32 i = 0; i < childrenLength1; ++i) {
nsCOMPtr<nsIDOMNode> child1, child2;
rv1 = children1->Item(i, getter_AddRefs(child1));
rv2 = children2->Item(i, getter_AddRefs(child2));
if (NS_FAILED(rv1) || NS_FAILED(rv2)) {
return PR_FALSE;
}
PRBool areEqual = nsXFormsUtils::AreNodesEqual(child1, child2, PR_TRUE);
if (!areEqual) {
return PR_FALSE;
}
}
}
return PR_TRUE;
}
/* static */
nsresult
nsXFormsUtils::GetWindowFromDocument(nsIDOMDocument *aDoc,
nsIDOMWindowInternal **aWindow)
{
NS_ENSURE_ARG(aDoc);
NS_ENSURE_ARG_POINTER(aWindow);
*aWindow = nsnull;
// Get nsIDOMWindowInternal
nsCOMPtr<nsIDOMDocumentView> dview(do_QueryInterface(aDoc));
NS_ENSURE_STATE(dview);
nsCOMPtr<nsIDOMAbstractView> aview;
dview->GetDefaultView(getter_AddRefs(aview));
nsCOMPtr<nsIDOMWindowInternal> internal(do_QueryInterface(aview));
NS_ENSURE_STATE(internal);
NS_ADDREF(*aWindow = internal);
return NS_OK;
}
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