Add m-esr52 at 52.6.0

1 files changed, 515 insertions, 0 deletions

diff --git a/rdf/base/nsRDFContainerUtils.cpp b/rdf/base/nsRDFContainerUtils.cpp
new file mode 100644
index 000000000..299722d4b
--- /dev/null
+++ b/rdf/base/nsRDFContainerUtils.cpp
@@ -0,0 +1,515 @@
+/* -*- 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/. */
+
+/*
+
+  Implementation for the RDF container utils.
+
+ */
+
+
+#include "nsCOMPtr.h"
+#include "nsIServiceManager.h"
+#include "nsIRDFContainer.h"
+#include "nsIRDFContainerUtils.h"
+#include "nsIRDFService.h"
+#include "nsRDFCID.h"
+#include "nsString.h"
+#include "nsXPIDLString.h"
+#include "plstr.h"
+#include "prprf.h"
+#include "rdf.h"
+#include "rdfutil.h"
+
+class RDFContainerUtilsImpl : public nsIRDFContainerUtils
+{
+public:
+    // nsISupports interface
+    NS_DECL_ISUPPORTS
+
+    // nsIRDFContainerUtils interface
+    NS_DECL_NSIRDFCONTAINERUTILS
+
+private:
+    friend nsresult NS_NewRDFContainerUtils(nsIRDFContainerUtils** aResult);
+
+    RDFContainerUtilsImpl();
+    virtual ~RDFContainerUtilsImpl();
+
+    nsresult MakeContainer(nsIRDFDataSource* aDataSource,
+                           nsIRDFResource* aResource,
+                           nsIRDFResource* aType,
+                           nsIRDFContainer** aResult);
+
+    bool IsA(nsIRDFDataSource* aDataSource, nsIRDFResource* aResource, nsIRDFResource* aType);
+
+    // pseudo constants
+    static int32_t gRefCnt;
+    static nsIRDFService* gRDFService;
+    static nsIRDFResource* kRDF_instanceOf;
+    static nsIRDFResource* kRDF_nextVal;
+    static nsIRDFResource* kRDF_Bag;
+    static nsIRDFResource* kRDF_Seq;
+    static nsIRDFResource* kRDF_Alt;
+    static nsIRDFLiteral* kOne;
+    static const char kRDFNameSpaceURI[];
+};
+
+int32_t         RDFContainerUtilsImpl::gRefCnt = 0;
+nsIRDFService*  RDFContainerUtilsImpl::gRDFService;
+nsIRDFResource* RDFContainerUtilsImpl::kRDF_instanceOf;
+nsIRDFResource* RDFContainerUtilsImpl::kRDF_nextVal;
+nsIRDFResource* RDFContainerUtilsImpl::kRDF_Bag;
+nsIRDFResource* RDFContainerUtilsImpl::kRDF_Seq;
+nsIRDFResource* RDFContainerUtilsImpl::kRDF_Alt;
+nsIRDFLiteral*  RDFContainerUtilsImpl::kOne;
+const char      RDFContainerUtilsImpl::kRDFNameSpaceURI[] = RDF_NAMESPACE_URI;
+
+////////////////////////////////////////////////////////////////////////
+// nsISupports interface
+
+NS_IMPL_ISUPPORTS(RDFContainerUtilsImpl, nsIRDFContainerUtils)
+
+////////////////////////////////////////////////////////////////////////
+// nsIRDFContainerUtils interface
+
+NS_IMETHODIMP
+RDFContainerUtilsImpl::IsOrdinalProperty(nsIRDFResource *aProperty, bool *_retval)
+{
+    NS_PRECONDITION(aProperty != nullptr, "null ptr");
+    if (! aProperty)
+        return NS_ERROR_NULL_POINTER;
+
+    nsresult rv;
+
+    const char	*propertyStr;
+    rv = aProperty->GetValueConst( &propertyStr );
+    if (NS_FAILED(rv)) return rv;
+
+    if (PL_strncmp(propertyStr, kRDFNameSpaceURI, sizeof(kRDFNameSpaceURI) - 1) != 0) {
+        *_retval = false;
+        return NS_OK;
+    }
+
+    const char* s = propertyStr;
+    s += sizeof(kRDFNameSpaceURI) - 1;
+    if (*s != '_') {
+        *_retval = false;
+        return NS_OK;
+    }
+
+    ++s;
+    while (*s) {
+        if (*s < '0' || *s > '9') {
+            *_retval = false;
+            return NS_OK;
+        }
+
+        ++s;
+    }
+
+    *_retval = true;
+    return NS_OK;
+}
+
+
+NS_IMETHODIMP
+RDFContainerUtilsImpl::IndexToOrdinalResource(int32_t aIndex, nsIRDFResource **aOrdinal)
+{
+    NS_PRECONDITION(aIndex > 0, "illegal value");
+    if (aIndex <= 0)
+        return NS_ERROR_ILLEGAL_VALUE;
+
+    nsAutoCString uri(kRDFNameSpaceURI);
+    uri.Append('_');
+    uri.AppendInt(aIndex);
+    
+    nsresult rv = gRDFService->GetResource(uri, aOrdinal);
+    NS_ASSERTION(NS_SUCCEEDED(rv), "unable to get ordinal resource");
+    if (NS_FAILED(rv)) return rv;
+    
+    return NS_OK;
+}
+
+
+NS_IMETHODIMP
+RDFContainerUtilsImpl::OrdinalResourceToIndex(nsIRDFResource *aOrdinal, int32_t *aIndex)
+{
+    NS_PRECONDITION(aOrdinal != nullptr, "null ptr");
+    if (! aOrdinal)
+        return NS_ERROR_NULL_POINTER;
+
+    const char	*ordinalStr;
+    if (NS_FAILED(aOrdinal->GetValueConst( &ordinalStr )))
+        return NS_ERROR_FAILURE;
+
+    const char* s = ordinalStr;
+    if (PL_strncmp(s, kRDFNameSpaceURI, sizeof(kRDFNameSpaceURI) - 1) != 0) {
+        NS_ERROR("not an ordinal");
+        return NS_ERROR_UNEXPECTED;
+    }
+
+    s += sizeof(kRDFNameSpaceURI) - 1;
+    if (*s != '_') {
+        NS_ERROR("not an ordinal");
+        return NS_ERROR_UNEXPECTED;
+    }
+
+    int32_t idx = 0;
+
+    ++s;
+    while (*s) {
+        if (*s < '0' || *s > '9') {
+            NS_ERROR("not an ordinal");
+            return NS_ERROR_UNEXPECTED;
+        }
+
+        idx *= 10;
+        idx += (*s - '0');
+
+        ++s;
+    }
+
+    *aIndex = idx;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+RDFContainerUtilsImpl::IsContainer(nsIRDFDataSource *aDataSource, nsIRDFResource *aResource, bool *_retval)
+{
+    NS_PRECONDITION(aDataSource != nullptr, "null ptr");
+    if (! aDataSource)
+        return NS_ERROR_NULL_POINTER;
+
+    NS_PRECONDITION(aResource != nullptr, "null ptr");
+    if (! aResource)
+        return NS_ERROR_NULL_POINTER;
+
+    NS_PRECONDITION(_retval != nullptr, "null ptr");
+    if (! _retval)
+        return NS_ERROR_NULL_POINTER;
+
+    if (IsA(aDataSource, aResource, kRDF_Seq) ||
+        IsA(aDataSource, aResource, kRDF_Bag) ||
+        IsA(aDataSource, aResource, kRDF_Alt)) {
+        *_retval = true;
+    }
+    else {
+        *_retval = false;
+    }
+    return NS_OK;
+}
+
+
+NS_IMETHODIMP
+RDFContainerUtilsImpl::IsEmpty(nsIRDFDataSource* aDataSource, nsIRDFResource* aResource, bool* _retval)
+{
+    if (! aDataSource)
+        return NS_ERROR_NULL_POINTER;
+
+    nsresult rv;
+
+    // By default, say that we're an empty container. Even if we're not
+    // really even a container.
+    *_retval = true;
+
+    nsCOMPtr<nsIRDFNode> nextValNode;
+    rv = aDataSource->GetTarget(aResource, kRDF_nextVal, true, getter_AddRefs(nextValNode));
+    if (NS_FAILED(rv)) return rv;
+
+    if (rv == NS_RDF_NO_VALUE)
+        return NS_OK;
+
+    nsCOMPtr<nsIRDFLiteral> nextValLiteral;
+    rv = nextValNode->QueryInterface(NS_GET_IID(nsIRDFLiteral), getter_AddRefs(nextValLiteral));
+    if (NS_FAILED(rv)) return rv;
+
+    if (nextValLiteral.get() != kOne)
+        *_retval = false;
+
+    return NS_OK;
+}
+
+
+NS_IMETHODIMP
+RDFContainerUtilsImpl::IsBag(nsIRDFDataSource *aDataSource, nsIRDFResource *aResource, bool *_retval)
+{
+    NS_PRECONDITION(aDataSource != nullptr, "null ptr");
+    if (! aDataSource)
+        return NS_ERROR_NULL_POINTER;
+
+    NS_PRECONDITION(aResource != nullptr, "null ptr");
+    if (! aResource)
+        return NS_ERROR_NULL_POINTER;
+
+    NS_PRECONDITION(_retval != nullptr, "null ptr");
+    if (! _retval)
+        return NS_ERROR_NULL_POINTER;
+
+    *_retval = IsA(aDataSource, aResource, kRDF_Bag);
+    return NS_OK;
+}
+
+
+NS_IMETHODIMP
+RDFContainerUtilsImpl::IsSeq(nsIRDFDataSource *aDataSource, nsIRDFResource *aResource, bool *_retval)
+{
+    NS_PRECONDITION(aDataSource != nullptr, "null ptr");
+    if (! aDataSource)
+        return NS_ERROR_NULL_POINTER;
+
+    NS_PRECONDITION(aResource != nullptr, "null ptr");
+    if (! aResource)
+        return NS_ERROR_NULL_POINTER;
+
+    NS_PRECONDITION(_retval != nullptr, "null ptr");
+    if (! _retval)
+        return NS_ERROR_NULL_POINTER;
+
+    *_retval = IsA(aDataSource, aResource, kRDF_Seq);
+    return NS_OK;
+}
+
+
+NS_IMETHODIMP
+RDFContainerUtilsImpl::IsAlt(nsIRDFDataSource *aDataSource, nsIRDFResource *aResource, bool *_retval)
+{
+    NS_PRECONDITION(aDataSource != nullptr, "null ptr");
+    if (! aDataSource)
+        return NS_ERROR_NULL_POINTER;
+
+    NS_PRECONDITION(aResource != nullptr, "null ptr");
+    if (! aResource)
+        return NS_ERROR_NULL_POINTER;
+
+    NS_PRECONDITION(_retval != nullptr, "null ptr");
+    if (! _retval)
+        return NS_ERROR_NULL_POINTER;
+
+    *_retval = IsA(aDataSource, aResource, kRDF_Alt);
+    return NS_OK;
+}
+
+
+NS_IMETHODIMP
+RDFContainerUtilsImpl::MakeBag(nsIRDFDataSource *aDataSource, nsIRDFResource *aResource, nsIRDFContainer **_retval)
+{
+    return MakeContainer(aDataSource, aResource, kRDF_Bag, _retval);
+}
+
+
+NS_IMETHODIMP
+RDFContainerUtilsImpl::MakeSeq(nsIRDFDataSource *aDataSource, nsIRDFResource *aResource, nsIRDFContainer **_retval)
+{
+    return MakeContainer(aDataSource, aResource, kRDF_Seq, _retval);
+}
+
+
+NS_IMETHODIMP
+RDFContainerUtilsImpl::MakeAlt(nsIRDFDataSource *aDataSource, nsIRDFResource *aResource, nsIRDFContainer **_retval)
+{
+    return MakeContainer(aDataSource, aResource, kRDF_Alt, _retval);
+}
+
+
+
+////////////////////////////////////////////////////////////////////////
+
+
+RDFContainerUtilsImpl::RDFContainerUtilsImpl()
+{
+    if (gRefCnt++ == 0) {
+        nsresult rv;
+
+        NS_DEFINE_CID(kRDFServiceCID, NS_RDFSERVICE_CID);
+        rv = CallGetService(kRDFServiceCID, &gRDFService);
+
+        NS_ASSERTION(NS_SUCCEEDED(rv), "unable to get RDF service");
+        if (NS_SUCCEEDED(rv)) {
+            gRDFService->GetResource(NS_LITERAL_CSTRING(RDF_NAMESPACE_URI "instanceOf"),
+                                     &kRDF_instanceOf);
+            gRDFService->GetResource(NS_LITERAL_CSTRING(RDF_NAMESPACE_URI "nextVal"),
+                                     &kRDF_nextVal);
+            gRDFService->GetResource(NS_LITERAL_CSTRING(RDF_NAMESPACE_URI "Bag"),
+                                     &kRDF_Bag);
+            gRDFService->GetResource(NS_LITERAL_CSTRING(RDF_NAMESPACE_URI "Seq"),
+                                     &kRDF_Seq);
+            gRDFService->GetResource(NS_LITERAL_CSTRING(RDF_NAMESPACE_URI "Alt"),
+                                     &kRDF_Alt);
+            gRDFService->GetLiteral(u"1", &kOne);
+        }
+    }
+}
+
+
+RDFContainerUtilsImpl::~RDFContainerUtilsImpl()
+{
+#ifdef DEBUG_REFS
+    --gInstanceCount;
+    fprintf(stdout, "%d - RDF: RDFContainerUtilsImpl\n", gInstanceCount);
+#endif
+
+    if (--gRefCnt == 0) {
+        NS_IF_RELEASE(gRDFService);
+        NS_IF_RELEASE(kRDF_instanceOf);
+        NS_IF_RELEASE(kRDF_nextVal);
+        NS_IF_RELEASE(kRDF_Bag);
+        NS_IF_RELEASE(kRDF_Seq);
+        NS_IF_RELEASE(kRDF_Alt);
+        NS_IF_RELEASE(kOne);
+    }
+}
+
+
+
+nsresult
+NS_NewRDFContainerUtils(nsIRDFContainerUtils** aResult)
+{
+    NS_PRECONDITION(aResult != nullptr, "null ptr");
+    if (! aResult)
+        return NS_ERROR_NULL_POINTER;
+
+    RDFContainerUtilsImpl* result =
+        new RDFContainerUtilsImpl();
+
+    if (! result)
+        return NS_ERROR_OUT_OF_MEMORY;
+
+    NS_ADDREF(result);
+    *aResult = result;
+    return NS_OK;
+}
+
+
+nsresult
+RDFContainerUtilsImpl::MakeContainer(nsIRDFDataSource* aDataSource, nsIRDFResource* aResource, nsIRDFResource* aType, nsIRDFContainer** aResult)
+{
+    NS_PRECONDITION(aDataSource != nullptr, "null ptr");
+    if (! aDataSource)	return NS_ERROR_NULL_POINTER;
+
+    NS_PRECONDITION(aResource != nullptr, "null ptr");
+    if (! aResource)	return NS_ERROR_NULL_POINTER;
+
+    NS_PRECONDITION(aType != nullptr, "null ptr");
+    if (! aType)	return NS_ERROR_NULL_POINTER;
+
+    if (aResult)	*aResult = nullptr;
+
+    nsresult rv;
+
+    // Check to see if somebody has already turned it into a container; if so
+    // don't try to do it again.
+    bool isContainer;
+    rv = IsContainer(aDataSource, aResource, &isContainer);
+    if (NS_FAILED(rv)) return rv;
+
+    if (!isContainer)
+    {
+	rv = aDataSource->Assert(aResource, kRDF_instanceOf, aType, true);
+	if (NS_FAILED(rv)) return rv;
+
+	rv = aDataSource->Assert(aResource, kRDF_nextVal, kOne, true);
+	if (NS_FAILED(rv)) return rv;
+    }
+
+    if (aResult) {
+        rv = NS_NewRDFContainer(aResult);
+        if (NS_FAILED(rv)) return rv;
+
+        rv = (*aResult)->Init(aDataSource, aResource);
+        if (NS_FAILED(rv)) return rv;
+    }
+
+    return NS_OK;
+}
+
+bool
+RDFContainerUtilsImpl::IsA(nsIRDFDataSource* aDataSource, nsIRDFResource* aResource, nsIRDFResource* aType)
+{
+    if (!aDataSource || !aResource || !aType) {
+        NS_WARNING("Unexpected null argument");
+        return false;
+    }
+
+    nsresult rv;
+
+    bool result;
+    rv = aDataSource->HasAssertion(aResource, kRDF_instanceOf, aType, true, &result);
+    if (NS_FAILED(rv))
+      return false;
+
+    return result;
+}
+
+NS_IMETHODIMP
+RDFContainerUtilsImpl::IndexOf(nsIRDFDataSource* aDataSource, nsIRDFResource* aContainer, nsIRDFNode* aElement, int32_t* aIndex)
+{
+    if (!aDataSource || !aContainer)
+        return NS_ERROR_NULL_POINTER;
+
+    // Assume we can't find it.
+    *aIndex = -1;
+
+    // If the resource is null, bail quietly
+    if (! aElement)
+      return NS_OK;
+
+    // We'll assume that fan-out is much higher than fan-in, so grovel
+    // through the inbound arcs, look for an ordinal resource, and
+    // decode it.
+    nsCOMPtr<nsISimpleEnumerator> arcsIn;
+    aDataSource->ArcLabelsIn(aElement, getter_AddRefs(arcsIn));
+    if (! arcsIn)
+        return NS_OK;
+
+    while (1) {
+        bool hasMoreArcs = false;
+        arcsIn->HasMoreElements(&hasMoreArcs);
+        if (! hasMoreArcs)
+            break;
+
+        nsCOMPtr<nsISupports> isupports;
+        arcsIn->GetNext(getter_AddRefs(isupports));
+        if (! isupports)
+            break;
+
+        nsCOMPtr<nsIRDFResource> property =
+            do_QueryInterface(isupports);
+
+        if (! property)
+            continue;
+
+        bool isOrdinal;
+        IsOrdinalProperty(property, &isOrdinal);
+        if (! isOrdinal)
+            continue;
+
+        nsCOMPtr<nsISimpleEnumerator> sources;
+        aDataSource->GetSources(property, aElement, true, getter_AddRefs(sources));
+        if (! sources)
+            continue;
+
+        while (1) {
+            bool hasMoreSources = false;
+            sources->HasMoreElements(&hasMoreSources);
+            if (! hasMoreSources)
+                break;
+
+            nsCOMPtr<nsISupports> isupports2;
+            sources->GetNext(getter_AddRefs(isupports2));
+            if (! isupports2)
+                break;
+
+            nsCOMPtr<nsIRDFResource> source =
+                do_QueryInterface(isupports2);
+
+            if (source == aContainer)
+                // Found it.
+                return OrdinalResourceToIndex(property, aIndex);
+        }
+    }
+
+    return NS_OK;
+}