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Cleaned up OnSetAttribute() and OnRemoveAttribute() to only listen on elements in the XUL document. Renamed the 'contentsgenerated' attribute to 'xulcontentsgenerated' to differentiate from the tree builder's stuff. Made this actually work.

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This commit is contained in:
waterson%netscape.com 1999-03-03 08:09:21 +00:00
parent c9a1447694
commit 4d5513faaf
1 changed files with 118 additions and 85 deletions
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203
rdf/content/src/nsRDFXULBuilder.cpp
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@ -121,7 +121,7 @@ private:
static PRInt32 kNameSpaceID_XUL;
static nsIAtom* kContainerAtom;
static nsIAtom* kContentsGeneratedAtom;
static nsIAtom* kXULContentsGeneratedAtom;
static nsIAtom* kDataSourcesAtom;
static nsIAtom* kIdAtom;
static nsIAtom* kTreeAtom;
@ -219,7 +219,7 @@ PRInt32 RDFXULBuilderImpl::kNameSpaceID_RDF = kNameSpaceID_Unknown;
PRInt32 RDFXULBuilderImpl::kNameSpaceID_XUL = kNameSpaceID_Unknown;
nsIAtom* RDFXULBuilderImpl::kContainerAtom;
nsIAtom* RDFXULBuilderImpl::kContentsGeneratedAtom;
nsIAtom* RDFXULBuilderImpl::kXULContentsGeneratedAtom;
nsIAtom* RDFXULBuilderImpl::kIdAtom;
nsIAtom* RDFXULBuilderImpl::kDataSourcesAtom;
nsIAtom* RDFXULBuilderImpl::kTreeAtom;
@ -273,11 +273,11 @@ RDFXULBuilderImpl::RDFXULBuilderImpl(void)
NS_ERROR("couldn't create namepsace manager");
}
kContainerAtom = NS_NewAtom("container");
kContentsGeneratedAtom = NS_NewAtom("contentsGenerated");
kIdAtom = NS_NewAtom("id");
kDataSourcesAtom = NS_NewAtom("datasources");
kTreeAtom = NS_NewAtom("tree");
kContainerAtom = NS_NewAtom("container");
kXULContentsGeneratedAtom = NS_NewAtom("xulcontentsgenerated");
kIdAtom = NS_NewAtom("id");
kDataSourcesAtom = NS_NewAtom("datasources");
kTreeAtom = NS_NewAtom("tree");
if (NS_SUCCEEDED(rv = nsServiceManager::GetService(kRDFServiceCID,
@ -327,7 +327,7 @@ RDFXULBuilderImpl::~RDFXULBuilderImpl(void)
NS_IF_RELEASE(kXUL_element);
NS_IF_RELEASE(kContainerAtom);
NS_IF_RELEASE(kContentsGeneratedAtom);
NS_IF_RELEASE(kXULContentsGeneratedAtom);
NS_IF_RELEASE(kIdAtom);
NS_IF_RELEASE(kDataSourcesAtom);
NS_IF_RELEASE(kTreeAtom);
@ -467,16 +467,20 @@ RDFXULBuilderImpl::CreateContents(nsIContent* aElement)
{
nsresult rv;
// First, mark the elements contents as being generated so that
// any re-entrant calls don't trigger an infinite recursion.
if (NS_FAILED(rv = aElement->SetAttribute(kNameSpaceID_XUL,
kContentsGeneratedAtom,
"true",
PR_FALSE))) {
NS_ERROR("unable to set contents-generated attribute");
// See if someone has marked the element's contents as being
// generated: this prevents a re-entrant call from triggering
// another generation.
nsAutoString attrValue;
if (NS_FAILED(rv = aElement->GetAttribute(kNameSpaceID_None,
kXULContentsGeneratedAtom,
attrValue))) {
NS_ERROR("unable to test contents-generated attribute");
return rv;
}
if ((rv == NS_CONTENT_ATTR_HAS_VALUE) && (attrValue.EqualsIgnoreCase("true")))
return NS_OK;
// Get the treeitem's resource so that we can generate cell
// values. We could QI for the nsIRDFResource here, but doing this
// via the nsIContent interface allows us to support generic nodes
@ -516,6 +520,16 @@ RDFXULBuilderImpl::CreateContents(nsIContent* aElement)
if (! rdf_IsContainer(mDB, resource))
return NS_ERROR_UNEXPECTED;
// Now mark the element's contents as being generated so that
// any re-entrant calls don't trigger an infinite recursion.
if (NS_FAILED(rv = aElement->SetAttribute(kNameSpaceID_None,
kXULContentsGeneratedAtom,
"true",
PR_FALSE))) {
NS_ERROR("unable to set contents-generated attribute");
return rv;
}
// Iterate through all of the element's children, and construct
// appropriate children for each arc.
nsCOMPtr<nsIRDFAssertionCursor> children;
@ -589,7 +603,7 @@ RDFXULBuilderImpl::OnAssert(nsIRDFResource* aSubject,
// them later.
nsAutoString contentsGenerated;
if (NS_FAILED(rv = element->GetAttribute(kNameSpaceID_None,
kContentsGeneratedAtom,
kXULContentsGeneratedAtom,
contentsGenerated))) {
NS_ERROR("severe problem trying to get attribute");
return rv;
@ -671,7 +685,7 @@ RDFXULBuilderImpl::OnUnassert(nsIRDFResource* aSubject,
// them later.
nsAutoString contentsGenerated;
if (NS_FAILED(rv = element->GetAttribute(kNameSpaceID_None,
kContentsGeneratedAtom,
kXULContentsGeneratedAtom,
contentsGenerated))) {
NS_ERROR("severe problem trying to get attribute");
return rv;
@ -1001,54 +1015,64 @@ RDFXULBuilderImpl::OnSetAttribute(nsIDOMElement* aElement, const nsString& aName
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;
}
// Make sure it's a XUL element; otherwise, we really don't have
// any business with the attribute.
PRBool isXULElement;
if (NS_SUCCEEDED(rv = mDB->HasAssertion(resource,
kRDF_instanceOf,
kXUL_element,
PR_TRUE,
&isXULElement))
&& isXULElement) {
// 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;
}
// 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;
}
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");
// 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;
}
rv = mDB->Unassert(resource, property, value);
NS_ASSERTION(NS_SUCCEEDED(rv), "unable to unassert old property value");
}
// Assert the new value
{
nsCOMPtr<nsIRDFLiteral> value;
if (NS_FAILED(rv = gRDFService->GetLiteral(aValue, getter_AddRefs(value)))) {
NS_ERROR("unable to construct literal");
nsCOMPtr<nsIRDFResource> property;
if (NS_FAILED(rv = GetResource(nameSpaceID, nameAtom, getter_AddRefs(property)))) {
NS_ERROR("unable to construct resource");
return rv;
}
if (NS_FAILED(rv = mDB->Assert(resource, property, value, PR_TRUE))) {
NS_ERROR("unable to assert new property value");
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");
}
}
// Assert the new value
{
nsCOMPtr<nsIRDFLiteral> value;
if (NS_FAILED(rv = gRDFService->GetLiteral(aValue, getter_AddRefs(value)))) {
NS_ERROR("unable to construct literal");
return rv;
}
if (NS_FAILED(rv = mDB->Assert(resource, property, value, PR_TRUE))) {
NS_ERROR("unable to assert new property value");
return rv;
}
}
}
return NS_OK;
}
@ -1066,40 +1090,49 @@ RDFXULBuilderImpl::OnRemoveAttribute(nsIDOMElement* aElement, const nsString& aN
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;
}
// Make sure it's a XUL element; otherwise, we really don't have
// any business with the attribute.
PRBool isXULElement;
if (NS_SUCCEEDED(rv = mDB->HasAssertion(resource,
kRDF_instanceOf,
kXUL_element,
PR_TRUE,
&isXULElement))
&& isXULElement) {
// 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");
// 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;
}
rv = mDB->Unassert(resource, property, value);
NS_ASSERTION(NS_SUCCEEDED(rv), "unable to unassert old property value");
}
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;
}