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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsIServiceManager.h"
#include "nsIDOMNode.h"
#include "nsIDOMElement.h"
#include "nsIContent.h"
#include "nsIRDFService.h"
#include "nsXULTemplateResultXML.h"
#include "nsXMLBinding.h"
static uint32_t sTemplateId = 0;
NS_IMPL_ISUPPORTS(nsXULTemplateResultXML, nsIXULTemplateResult)
nsXULTemplateResultXML::nsXULTemplateResultXML(nsXMLQuery* aQuery,
nsIContent* aNode,
nsXMLBindingSet* aBindings)
: mQuery(aQuery), mNode(aNode)
{
// If the node has an id, create the uri from it. Otherwise, there isn't
// anything to identify the node with so just use a somewhat random number.
nsCOMPtr<nsIAtom> id = mNode->GetID();
if (id) {
nsCOMPtr<nsIURI> uri = mNode->GetBaseURI();
nsAutoCString spec;
uri->GetSpec(spec);
mId = NS_ConvertUTF8toUTF16(spec);
nsAutoString idstr;
id->ToString(idstr);
mId += NS_LITERAL_STRING("#") + idstr;
}
else {
nsAutoString rowid(NS_LITERAL_STRING("row"));
rowid.AppendInt(++sTemplateId);
mId.Assign(rowid);
}
if (aBindings)
mRequiredValues.SetBindingSet(aBindings);
}
NS_IMETHODIMP
nsXULTemplateResultXML::GetIsContainer(bool* aIsContainer)
{
// a node is considered a container if it has children
*aIsContainer = mNode && mNode->HasChildNodes();
return NS_OK;
}
NS_IMETHODIMP
nsXULTemplateResultXML::GetIsEmpty(bool* aIsEmpty)
{
// a node is considered empty if it has no elements as children
nsCOMPtr<nsIContent> content = do_QueryInterface(mNode);
if (content) {
for (nsIContent* child = content->GetFirstChild();
child;
child = child->GetNextSibling()) {
if (child->IsElement()) {
*aIsEmpty = false;
return NS_OK;
}
}
}
*aIsEmpty = true;
return NS_OK;
}
NS_IMETHODIMP
nsXULTemplateResultXML::GetMayProcessChildren(bool* aMayProcessChildren)
{
*aMayProcessChildren = true;
return NS_OK;
}
NS_IMETHODIMP
nsXULTemplateResultXML::GetId(nsAString& aId)
{
aId = mId;
return NS_OK;
}
NS_IMETHODIMP
nsXULTemplateResultXML::GetResource(nsIRDFResource** aResource)
{
*aResource = nullptr;
return NS_OK;
}
NS_IMETHODIMP
nsXULTemplateResultXML::GetType(nsAString& aType)
{
aType.Truncate();
return NS_OK;
}
NS_IMETHODIMP
nsXULTemplateResultXML::GetBindingFor(nsIAtom* aVar, nsAString& aValue)
{
NS_ENSURE_ARG_POINTER(aVar);
// get the position of the atom in the variables table
nsXMLBinding* binding;
int32_t idx = mRequiredValues.LookupTargetIndex(aVar, &binding);
if (idx >= 0) {
mRequiredValues.GetStringAssignmentFor(this, binding, idx, aValue);
return NS_OK;
}
idx = mOptionalValues.LookupTargetIndex(aVar, &binding);
if (idx >= 0) {
mOptionalValues.GetStringAssignmentFor(this, binding, idx, aValue);
return NS_OK;
}
// if the variable is not bound, just use the variable name as the name of
// an attribute to retrieve
nsAutoString attr;
aVar->ToString(attr);
if (attr.Length() > 1) {
nsCOMPtr<nsIDOMElement> element = do_QueryInterface(mNode);
if (element)
return element->GetAttribute(Substring(attr, 1), aValue);
}
aValue.Truncate();
return NS_OK;
}
NS_IMETHODIMP
nsXULTemplateResultXML::GetBindingObjectFor(nsIAtom* aVar, nsISupports** aValue)
{
NS_ENSURE_ARG_POINTER(aVar);
nsXMLBinding* binding;
nsCOMPtr<nsISupports> node;
if (mQuery && aVar == mQuery->GetMemberVariable()) {
node = mNode;
}
else {
int32_t idx = mRequiredValues.LookupTargetIndex(aVar, &binding);
if (idx > 0) {
node = mRequiredValues.GetNodeAssignmentFor(this, binding, idx);
}
else {
idx = mOptionalValues.LookupTargetIndex(aVar, &binding);
if (idx > 0) {
node = mOptionalValues.GetNodeAssignmentFor(this, binding, idx);
}
}
}
node.forget(aValue);
return NS_OK;
}
NS_IMETHODIMP
nsXULTemplateResultXML::RuleMatched(nsISupports* aQueryNode,
nsIDOMNode* aRuleNode)
{
// when a rule matches, set the bindings that must be used.
nsXULTemplateQueryProcessorXML* processor = mQuery ? mQuery->Processor() :
nullptr;
if (processor) {
nsXMLBindingSet* bindings =
processor->GetOptionalBindingsForRule(aRuleNode);
if (bindings)
mOptionalValues.SetBindingSet(bindings);
}
return NS_OK;
}
NS_IMETHODIMP
nsXULTemplateResultXML::HasBeenRemoved()
{
return NS_OK;
}
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