1 files changed, 371 insertions, 0 deletions
diff --git a/mailnews/base/src/nsMsgRDFDataSource.cpp b/mailnews/base/src/nsMsgRDFDataSource.cpp
new file mode 100644
index 000000000..5cdbf5cc6
--- /dev/null
+++ b/mailnews/base/src/nsMsgRDFDataSource.cpp
@@ -0,0 +1,371 @@
+/* -*- 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 "nsMsgRDFDataSource.h"
+#include "nsRDFCID.h"
+#include "rdf.h"
+#include "plstr.h"
+#include "nsMsgRDFUtils.h"
+#include "nsEnumeratorUtils.h"
+#include "nsIObserverService.h"
+#include "nsServiceManagerUtils.h"
+#include "nsMsgUtils.h"
+#include "mozilla/Services.h"
+
+static NS_DEFINE_CID(kRDFServiceCID, NS_RDFSERVICE_CID);
+
+nsMsgRDFDataSource::nsMsgRDFDataSource():
+    m_shuttingDown(false),
+    mInitialized(false)
+{
+}
+
+nsMsgRDFDataSource::~nsMsgRDFDataSource()
+{
+  // final shutdown happens here
+  NS_ASSERTION(!mInitialized, "Object going away without cleanup, possibly dangerous!");
+  if (mInitialized) Cleanup();
+}
+
+/* initialization happens here - object is constructed,
+   but possibly partially shut down
+*/
+nsresult
+nsMsgRDFDataSource::Init()
+{
+  NS_ENSURE_TRUE(!mInitialized, NS_ERROR_ALREADY_INITIALIZED);
+
+  nsresult rv;
+  /* Add an observer to XPCOM shutdown */
+  nsCOMPtr<nsIObserverService> obs =
+    mozilla::services::GetObserverService();
+  NS_ENSURE_TRUE(obs, NS_ERROR_UNEXPECTED);
+  rv = obs->AddObserver(static_cast<nsIObserver*>(this), NS_XPCOM_SHUTDOWN_OBSERVER_ID, true);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  getRDFService();
+
+  mInitialized=true;
+  return rv;
+}
+
+void nsMsgRDFDataSource::Cleanup()
+{
+  mRDFService = nullptr;
+
+  // release the window
+  mWindow = nullptr;
+
+  mInitialized = false;
+}
+
+NS_IMPL_CYCLE_COLLECTION_CLASS(nsMsgRDFDataSource)
+
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsMsgRDFDataSource)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mObservers)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mWindow)
+  NS_IMPL_CYCLE_COLLECTION_UNLINK(mRDFService)
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END
+
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsMsgRDFDataSource)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mObservers)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mRDFService)
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(nsMsgRDFDataSource)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(nsMsgRDFDataSource)
+
+NS_INTERFACE_MAP_BEGIN(nsMsgRDFDataSource)
+  NS_INTERFACE_MAP_ENTRY(nsIRDFDataSource)
+  NS_INTERFACE_MAP_ENTRY(nsIObserver)
+  NS_INTERFACE_MAP_ENTRY(nsIMsgRDFDataSource)
+  NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
+  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIRDFDataSource)
+  NS_INTERFACE_MAP_ENTRIES_CYCLE_COLLECTION(nsMsgRDFDataSource)
+NS_INTERFACE_MAP_END
+
+/* readonly attribute string URI; */
+NS_IMETHODIMP
+nsMsgRDFDataSource::GetURI(char * *aURI)
+{
+    NS_NOTREACHED("should be implemented by a subclass");
+    return NS_ERROR_UNEXPECTED;
+}
+
+
+/* nsIRDFResource GetSource (in nsIRDFResource aProperty, in nsIRDFNode aTarget, in boolean aTruthValue); */
+NS_IMETHODIMP
+nsMsgRDFDataSource::GetSource(nsIRDFResource *aProperty, nsIRDFNode *aTarget, bool aTruthValue, nsIRDFResource **_retval)
+{
+    return NS_RDF_NO_VALUE;
+}
+
+
+/* nsISimpleEnumerator GetSources (in nsIRDFResource aProperty, in nsIRDFNode aTarget, in boolean aTruthValue); */
+NS_IMETHODIMP
+nsMsgRDFDataSource::GetSources(nsIRDFResource *aProperty, nsIRDFNode *aTarget, bool aTruthValue, nsISimpleEnumerator **_retval)
+{
+    return NS_RDF_NO_VALUE;
+}
+
+
+/* nsIRDFNode GetTarget (in nsIRDFResource aSource, in nsIRDFResource aProperty, in boolean aTruthValue); */
+NS_IMETHODIMP
+nsMsgRDFDataSource::GetTarget(nsIRDFResource *aSource, nsIRDFResource *aProperty, bool aTruthValue, nsIRDFNode **_retval)
+{
+    return NS_RDF_NO_VALUE;
+}
+
+
+/* nsISimpleEnumerator GetTargets (in nsIRDFResource aSource, in nsIRDFResource aProperty, in boolean aTruthValue); */
+NS_IMETHODIMP
+nsMsgRDFDataSource::GetTargets(nsIRDFResource *aSource, nsIRDFResource *aProperty, bool aTruthValue, nsISimpleEnumerator **_retval)
+{
+    return NS_RDF_NO_VALUE;
+}
+
+
+/* void Assert (in nsIRDFResource aSource, in nsIRDFResource aProperty, in nsIRDFNode aTarget, in boolean aTruthValue); */
+NS_IMETHODIMP
+nsMsgRDFDataSource::Assert(nsIRDFResource *aSource, nsIRDFResource *aProperty, nsIRDFNode *aTarget, bool aTruthValue)
+{
+    return NS_RDF_NO_VALUE;
+}
+
+
+/* void Unassert (in nsIRDFResource aSource, in nsIRDFResource aProperty, in nsIRDFNode aTarget); */
+NS_IMETHODIMP
+nsMsgRDFDataSource::Unassert(nsIRDFResource *aSource, nsIRDFResource *aProperty, nsIRDFNode *aTarget)
+{
+    return NS_RDF_NO_VALUE;
+}
+
+
+NS_IMETHODIMP
+nsMsgRDFDataSource::Change(nsIRDFResource *aSource,
+                           nsIRDFResource *aProperty,
+                           nsIRDFNode *aOldTarget,
+                           nsIRDFNode *aNewTarget)
+{
+    return NS_RDF_NO_VALUE;
+}
+
+NS_IMETHODIMP
+nsMsgRDFDataSource::Move(nsIRDFResource *aOldSource,
+                         nsIRDFResource *aNewSource,
+                         nsIRDFResource *aProperty,
+                         nsIRDFNode *aTarget)
+{
+    return NS_RDF_NO_VALUE;
+}
+
+
+/* boolean HasAssertion (in nsIRDFResource aSource, in nsIRDFResource aProperty, in nsIRDFNode aTarget, in boolean aTruthValue); */
+NS_IMETHODIMP
+nsMsgRDFDataSource::HasAssertion(nsIRDFResource *aSource, nsIRDFResource *aProperty, nsIRDFNode *aTarget, bool aTruthValue, bool *_retval)
+{
+    *_retval = false;
+    return NS_OK;
+}
+
+
+/* void AddObserver (in nsIRDFObserver aObserver); */
+NS_IMETHODIMP
+nsMsgRDFDataSource::AddObserver(nsIRDFObserver *aObserver)
+{
+  NS_ENSURE_ARG_POINTER(aObserver);
+  if (!mInitialized)
+      Init();
+  mObservers.AppendObject(aObserver);
+  return NS_OK;
+}
+
+/* void RemoveObserver (in nsIRDFObserver aObserver); */
+NS_IMETHODIMP
+nsMsgRDFDataSource::RemoveObserver(nsIRDFObserver *aObserver)
+{
+  NS_ENSURE_ARG_POINTER(aObserver);
+  mObservers.RemoveObject(aObserver);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsMsgRDFDataSource::HasArcIn(nsIRDFNode *aNode, nsIRDFResource *aArc, bool *result)
+{
+  *result = false;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsMsgRDFDataSource::HasArcOut(nsIRDFResource *aSource, nsIRDFResource *aArc, bool *result)
+{
+  *result = false;
+  return NS_OK;
+}
+
+/* nsISimpleEnumerator ArcLabelsIn (in nsIRDFNode aNode); */
+NS_IMETHODIMP
+nsMsgRDFDataSource::ArcLabelsIn(nsIRDFNode *aNode, nsISimpleEnumerator **_retval)
+{
+  return NS_NewEmptyEnumerator(_retval);
+}
+
+
+/* nsISimpleEnumerator ArcLabelsOut (in nsIRDFResource aSource); */
+NS_IMETHODIMP
+nsMsgRDFDataSource::ArcLabelsOut(nsIRDFResource *aSource, nsISimpleEnumerator **_retval)
+{
+    return NS_RDF_NO_VALUE;
+}
+
+
+/* nsISimpleEnumerator GetAllResources (); */
+NS_IMETHODIMP
+nsMsgRDFDataSource::GetAllResources(nsISimpleEnumerator **_retval)
+{
+    return NS_RDF_NO_VALUE;
+}
+
+
+/* nsISimpleEnumerator GetAllCmds (in nsIRDFResource aSource); */
+NS_IMETHODIMP
+nsMsgRDFDataSource::GetAllCmds(nsIRDFResource *aSource, nsISimpleEnumerator **_retval)
+{
+    return NS_RDF_NO_VALUE;
+}
+
+
+/* boolean IsCommandEnabled (in nsISupports aSources, in nsIRDFResource aCommand, in nsISupports aArguments); */
+NS_IMETHODIMP
+nsMsgRDFDataSource::IsCommandEnabled(nsISupports *aSources, nsIRDFResource *aCommand, nsISupports *aArguments, bool *_retval)
+{
+    return NS_RDF_NO_VALUE;
+}
+
+
+/* void DoCommand (in nsISupports aSources, in nsIRDFResource aCommand, in nsISupports aArguments); */
+NS_IMETHODIMP
+nsMsgRDFDataSource::DoCommand(nsISupports *aSources, nsIRDFResource *aCommand, nsISupports *aArguments)
+{
+    return NS_RDF_NO_VALUE;
+}
+
+/* void BeginUpdateBatch (); */
+NS_IMETHODIMP
+nsMsgRDFDataSource::BeginUpdateBatch()
+{
+    return NS_OK;
+}
+
+/* void EndUpdateBatch (); */
+NS_IMETHODIMP
+nsMsgRDFDataSource::EndUpdateBatch()
+{
+    return NS_OK;
+}
+
+
+/* XPCOM Shutdown observer */
+NS_IMETHODIMP
+nsMsgRDFDataSource::Observe(nsISupports *aSubject, const char *aTopic, const char16_t *someData )
+{
+  if (!strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID)) {
+    m_shuttingDown = true;
+    Cleanup();
+  }
+  return NS_OK;
+}
+
+
+NS_IMETHODIMP nsMsgRDFDataSource::GetWindow(nsIMsgWindow * *aWindow)
+{
+  if(!aWindow)
+    return NS_ERROR_NULL_POINTER;
+
+  *aWindow = mWindow;
+  NS_IF_ADDREF(*aWindow);
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsMsgRDFDataSource::SetWindow(nsIMsgWindow * aWindow)
+{
+  mWindow = aWindow;
+  return NS_OK;
+}
+
+
+nsIRDFService *
+nsMsgRDFDataSource::getRDFService()
+{
+    if (!mRDFService && !m_shuttingDown) {
+        nsresult rv;
+        mRDFService = do_GetService(kRDFServiceCID, &rv);
+        if (NS_FAILED(rv)) return nullptr;
+    }
+
+    return mRDFService;
+}
+
+nsresult nsMsgRDFDataSource::NotifyPropertyChanged(nsIRDFResource *resource,
+                                                   nsIRDFResource *propertyResource,
+                                                   nsIRDFNode *newNode,
+                                                   nsIRDFNode *oldNode /* = nullptr */)
+{
+
+  NotifyObservers(resource, propertyResource, newNode, oldNode, false, true);
+  return NS_OK;
+
+}
+
+nsresult nsMsgRDFDataSource::NotifyObservers(nsIRDFResource *subject,
+                                                nsIRDFResource *property,
+                                                nsIRDFNode *newObject,
+                                                nsIRDFNode *oldObject,
+                                                bool assert, bool change)
+{
+  NS_ASSERTION(!(change && assert),
+               "Can't change and assert at the same time!\n");
+  nsMsgRDFNotification note = { this, subject, property, newObject, oldObject };
+  if(change)
+    mObservers.EnumerateForwards(changeEnumFunc, &note);
+  else if (assert)
+    mObservers.EnumerateForwards(assertEnumFunc, &note);
+  else
+    mObservers.EnumerateForwards(unassertEnumFunc, &note);
+  return NS_OK;
+}
+
+bool
+nsMsgRDFDataSource::assertEnumFunc(nsIRDFObserver *aObserver, void *aData)
+{
+  nsMsgRDFNotification *note = (nsMsgRDFNotification *)aData;
+  aObserver->OnAssert(note->datasource,
+                     note->subject,
+                     note->property,
+                     note->newObject);
+  return true;
+}
+
+bool
+nsMsgRDFDataSource::unassertEnumFunc(nsIRDFObserver *aObserver, void *aData)
+{
+  nsMsgRDFNotification* note = (nsMsgRDFNotification *)aData;
+  aObserver->OnUnassert(note->datasource,
+                       note->subject,
+                       note->property,
+                       note->newObject);
+  return true;
+}
+
+bool
+nsMsgRDFDataSource::changeEnumFunc(nsIRDFObserver *aObserver, void *aData)
+{
+  nsMsgRDFNotification* note = (nsMsgRDFNotification *)aData;
+  aObserver->OnChange(note->datasource,
+                     note->subject,
+                     note->property,
+                     note->oldObject, note->newObject);
+  return true;
+}