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Implemented most of the rest of the DOM observer methods.

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git-svn-id: svn://10.0.0.236/trunk@21090 18797224-902f-48f8-a5cc-f745e15eee43
This commit is contained in:
waterson%netscape.com
1999-02-18 02:02:48 +00:00
parent bd900b8256
commit 231408e37d
1 changed files with 273 additions and 32 deletions
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305
mozilla/rdf/content/src/nsRDFXULBuilder.cpp
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@@ -201,6 +201,11 @@ public:
nsIAtom* aTag,
nsIRDFResource* aResource,
nsIContent** aResult);
nsresult
GetResource(PRInt32 aNameSpaceID,
nsIAtom* aNameAtom,
nsIRDFResource** aResource);
};
////////////////////////////////////////////////////////////////////////
@@ -720,12 +725,8 @@ RDFXULBuilderImpl::OnInsertBefore(nsIDOMNode* aParent, nsIDOMNode* aNewChild, ns
nsresult rv;
// Translate each of the DOM nodes into the RDF resource for which
// they are acting as a proxy.
// XXX TODO Figure out how to constrain this to only update nodes
// that are appropriate for the XUL builder to be
// updating. This'll just whack _every_ node that comes through...
// they are acting as a proxy. This implementation will only
// update nodes that are an RDF:instanceOf a XUL:element.
// XXX If aNewChild doesn't have a resource, then somebody is
// inserting a non-RDF element into aParent. Panic for now.
@@ -811,8 +812,61 @@ RDFXULBuilderImpl::OnInsertBefore(nsIDOMNode* aParent, nsIDOMNode* aNewChild, ns
NS_IMETHODIMP
RDFXULBuilderImpl::OnReplaceChild(nsIDOMNode* aParent, nsIDOMNode* aNewChild, nsIDOMNode* aOldChild)
{
NS_NOTYETIMPLEMENTED("write me!");
return NS_ERROR_NOT_IMPLEMENTED;
nsresult rv;
// Translate each of the DOM nodes into the RDF resource for which
// they are acting as a proxy. This implementation will only
// update nodes that are an RDF:instanceOf a XUL:element.
// XXX If aNewChild doesn't have a resource, then somebody is
// inserting a non-RDF element into aParent. Panic for now.
nsCOMPtr<nsIRDFResource> newChild;
if (NS_FAILED(rv = GetDOMNodeResource(aNewChild, getter_AddRefs(newChild)))) {
NS_ERROR("new child doesn't have a resource");
return rv;
}
// XXX ibid
nsCOMPtr<nsIRDFResource> oldChild;
if (NS_FAILED(rv = GetDOMNodeResource(aOldChild, getter_AddRefs(oldChild)))) {
NS_ERROR("old child doesn't have a resource");
return rv;
}
nsCOMPtr<nsIRDFResource> parent;
if (NS_SUCCEEDED(rv = GetDOMNodeResource(aParent, getter_AddRefs(parent)))) {
// ...and it's a XUL element...
PRBool isXULElement;
if (NS_SUCCEEDED(rv = mDB->HasAssertion(parent,
kRDF_instanceOf,
kXUL_element,
PR_TRUE,
&isXULElement))
&& isXULElement) {
// Remember the old child's index...
PRInt32 index;
if (NS_FAILED(rv = rdf_ContainerIndexOf(mDB, parent, oldChild, &index))) {
NS_ERROR("unable to get index of old child in container");
return rv;
}
// ...then remove the old child from the old collection...
if (NS_FAILED(rv = rdf_ContainerRemoveElement(mDB, parent, oldChild))) {
NS_ERROR("unable to remove old child from container");
return rv;
}
// ...and add the new child to the collection at the old child's index
if (NS_FAILED(rv = rdf_ContainerInsertElementAt(mDB, parent, newChild, index))) {
NS_ERROR("unable to add new child to container");
return rv;
}
}
}
return NS_OK;
}
@@ -820,8 +874,42 @@ RDFXULBuilderImpl::OnReplaceChild(nsIDOMNode* aParent, nsIDOMNode* aNewChild, ns
NS_IMETHODIMP
RDFXULBuilderImpl::OnRemoveChild(nsIDOMNode* aParent, nsIDOMNode* aOldChild)
{
NS_NOTYETIMPLEMENTED("write me!");
return NS_ERROR_NOT_IMPLEMENTED;
nsresult rv;
// XXX may want to check _here_ to make sure that aOldChild is
// actually a child of aParent...
// XXX If aOldChild doesn't have a resource, then somebody is
// removing a non-RDF element from aParent. This probably isn't a
// big deal, but panic for now.
nsCOMPtr<nsIRDFResource> oldChild;
if (NS_FAILED(rv = GetDOMNodeResource(aOldChild, getter_AddRefs(oldChild)))) {
NS_ERROR("new child doesn't have a resource");
return rv;
}
// If the new parent has a resource...
nsCOMPtr<nsIRDFResource> parent;
if (NS_SUCCEEDED(rv = GetDOMNodeResource(aParent, getter_AddRefs(parent)))) {
// ...and it's a XUL element...
PRBool isXULElement;
if (NS_SUCCEEDED(rv = mDB->HasAssertion(parent,
kRDF_instanceOf,
kXUL_element,
PR_TRUE,
&isXULElement))
&& isXULElement) {
// ...then remove it from the container
if (NS_FAILED(rv = rdf_ContainerRemoveElement(mDB, parent, oldChild))) {
NS_ERROR("unable to insert new element into container");
return rv;
}
}
}
return NS_OK;
}
@@ -829,8 +917,71 @@ RDFXULBuilderImpl::OnRemoveChild(nsIDOMNode* aParent, nsIDOMNode* aOldChild)
NS_IMETHODIMP
RDFXULBuilderImpl::OnAppendChild(nsIDOMNode* aParent, nsIDOMNode* aNewChild)
{
NS_NOTYETIMPLEMENTED("write me!");
return NS_ERROR_NOT_IMPLEMENTED;
nsresult rv;
// XXX If aNewChild doesn't have a resource, then somebody is
// appending a non-RDF element into aParent. Panic for now.
nsCOMPtr<nsIRDFResource> newChild;
if (NS_FAILED(rv = GetDOMNodeResource(aNewChild, getter_AddRefs(newChild)))) {
NS_ERROR("new child doesn't have a resource");
return rv;
}
// If there was an old parent for newChild, then make sure to
// remove that relationship.
nsCOMPtr<nsIDOMNode> oldParentNode;
if (NS_FAILED(rv = aNewChild->GetParentNode(getter_AddRefs(oldParentNode)))) {
NS_ERROR("unable to get new child's parent");
return rv;
}
if (oldParentNode) {
nsCOMPtr<nsIRDFResource> oldParent;
// If the old parent has a resource...
if (NS_SUCCEEDED(rv = GetDOMNodeResource(oldParentNode, getter_AddRefs(oldParent)))) {
// ...and it's a XUL element...
PRBool isXULElement;
if (NS_SUCCEEDED(rv = mDB->HasAssertion(oldParent,
kRDF_instanceOf,
kXUL_element,
PR_TRUE,
&isXULElement))
&& isXULElement) {
// remove the child from the old collection
if (NS_FAILED(rv = rdf_ContainerRemoveElement(mDB, oldParent, newChild))) {
NS_ERROR("unable to remove newChild from oldParent");
return rv;
}
}
}
}
// If the new parent has a resource...
nsCOMPtr<nsIRDFResource> parent;
if (NS_SUCCEEDED(rv = GetDOMNodeResource(aParent, getter_AddRefs(parent)))) {
// ...and it's a XUL element...
PRBool isXULElement;
if (NS_SUCCEEDED(rv = mDB->HasAssertion(parent,
kRDF_instanceOf,
kXUL_element,
PR_TRUE,
&isXULElement))
&& isXULElement) {
// ...then append it to the container
if (NS_FAILED(rv = rdf_ContainerAppendElement(mDB, parent, newChild))) {
NS_ERROR("unable to insert new element into container");
return rv;
}
}
}
return NS_OK;
}
@@ -866,23 +1017,9 @@ RDFXULBuilderImpl::OnSetAttribute(nsIDOMElement* aElement, const nsString& aName
return rv;
}
NS_ASSERTION(nameAtom != nsnull, "no name");
NS_ASSERTION(nameSpaceID != kNameSpaceID_Unknown, "no namespace");
// construct a fully-qualified URI from the namespace/tag pair.
nsAutoString uri;
gNameSpaceManager->GetNameSpaceURI(nameSpaceID, uri);
// XXX check to see if we need to insert a '/' or a '#'
nsAutoString tag(nameAtom->GetUnicode());
if (uri.Last() != '#' && uri.Last() != '/' && tag.First() != '#')
uri.Append('#');
uri.Append(tag);
nsCOMPtr<nsIRDFResource> property;
if (NS_FAILED(rv = gRDFService->GetUnicodeResource(uri, getter_AddRefs(property)))) {
NS_ERROR("unable to get property resource");
if (NS_FAILED(rv = GetResource(nameSpaceID, nameAtom, getter_AddRefs(property)))) {
NS_ERROR("unable to construct resource");
return rv;
}
@@ -920,8 +1057,51 @@ RDFXULBuilderImpl::OnSetAttribute(nsIDOMElement* aElement, const nsString& aName
NS_IMETHODIMP
RDFXULBuilderImpl::OnRemoveAttribute(nsIDOMElement* aElement, const nsString& aName)
{
NS_NOTYETIMPLEMENTED("write me!");
return NS_ERROR_NOT_IMPLEMENTED;
nsresult rv;
nsCOMPtr<nsIRDFResource> resource;
if (NS_FAILED(rv = GetDOMNodeResource(aElement, getter_AddRefs(resource)))) {
// XXX it's not a resource element, so there's no assertions
// we need to make on the back-end. Should we just do the
// update?
return NS_OK;
}
// Get the nsIContent interface, it's a bit more utilitarian
nsCOMPtr<nsIContent> element( do_QueryInterface(aElement) );
if (! element) {
NS_ERROR("element doesn't support nsIContent");
return NS_ERROR_UNEXPECTED;
}
// Split the property name into its namespace and tag components
PRInt32 nameSpaceID;
nsCOMPtr<nsIAtom> nameAtom;
if (NS_FAILED(rv = element->ParseAttributeString(aName, *getter_AddRefs(nameAtom), nameSpaceID))) {
NS_ERROR("unable to parse attribute string");
return rv;
}
nsCOMPtr<nsIRDFResource> property;
if (NS_FAILED(rv = GetResource(nameSpaceID, nameAtom, getter_AddRefs(property)))) {
NS_ERROR("unable to construct resource");
return rv;
}
// Unassert the old value, if there was one.
nsAutoString oldValue;
if (NS_CONTENT_ATTR_HAS_VALUE == element->GetAttribute(nameSpaceID, nameAtom, oldValue)) {
nsCOMPtr<nsIRDFLiteral> value;
if (NS_FAILED(rv = gRDFService->GetLiteral(oldValue, getter_AddRefs(value)))) {
NS_ERROR("unable to construct literal");
return rv;
}
rv = mDB->Unassert(resource, property, value);
NS_ASSERTION(NS_SUCCEEDED(rv), "unable to unassert old property value");
}
return NS_OK;
}
NS_IMETHODIMP
@@ -1386,8 +1566,38 @@ RDFXULBuilderImpl::RemoveAttribute(nsIContent* aElement,
nsIRDFResource* aProperty,
nsIRDFNode* aValue)
{
NS_NOTYETIMPLEMENTED("write me!");
return NS_ERROR_NOT_IMPLEMENTED;
nsresult rv;
// First, split the property into its namespace and tag components
PRInt32 nameSpaceID;
nsCOMPtr<nsIAtom> tag;
if (NS_FAILED(rv = mDocument->SplitProperty(aProperty, &nameSpaceID, getter_AddRefs(tag)))) {
NS_ERROR("unable to split resource into namespace/tag pair");
return rv;
}
if (IsHTMLElement(aElement)) {
// XXX HTML elements are picky and only want attributes from
// certain namespaces. We'll just assume that, if the
// attribute _isn't_ in one of these namespaces, it never got
// added, so removing it is a no-op.
switch (nameSpaceID) {
case kNameSpaceID_HTML:
case kNameSpaceID_None:
case kNameSpaceID_Unknown:
break;
default:
NS_WARNING("ignoring non-HTML attribute on HTML tag");
return NS_OK;
}
}
// XXX At this point, we may want to be extra clever, and see if
// the Unassert() actually "exposed" some other multiattribute...
rv = aElement->UnsetAttribute(nameSpaceID, tag, PR_TRUE);
NS_ASSERTION(NS_SUCCEEDED(rv), "problem unsetting attribute");
return rv;
}
nsresult
@@ -1549,3 +1759,34 @@ RDFXULBuilderImpl::CreateResourceElement(PRInt32 aNameSpaceID,
NS_ADDREF(*aResult);
return NS_OK;
}
nsresult
RDFXULBuilderImpl::GetResource(PRInt32 aNameSpaceID,
nsIAtom* aNameAtom,
nsIRDFResource** aResource)
{
NS_PRECONDITION(aNameAtom != nsnull, "null ptr");
if (! aNameAtom)
return NS_ERROR_NULL_POINTER;
// XXX should we allow nodes with no namespace???
NS_PRECONDITION(aNameSpaceID != kNameSpaceID_Unknown, "no namespace");
if (aNameSpaceID == kNameSpaceID_Unknown)
return NS_ERROR_UNEXPECTED;
// construct a fully-qualified URI from the namespace/tag pair.
nsAutoString uri;
gNameSpaceManager->GetNameSpaceURI(aNameSpaceID, uri);
// XXX check to see if we need to insert a '/' or a '#'
nsAutoString tag(aNameAtom->GetUnicode());
if (uri.Last() != '#' && uri.Last() != '/' && tag.First() != '#')
uri.Append('#');
uri.Append(tag);
nsresult rv = gRDFService->GetUnicodeResource(uri, aResource);
NS_ASSERTION(NS_SUCCEEDED(rv), "unable to get resource");
return rv;
}