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gecko/xpfe/components/windowds/nsWindowDataSource.cpp

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 200
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsWindowDataSource.h"
#include "nsIXULWindow.h"
#include "rdf.h"
#include "nsIRDFContainerUtils.h"
#include "nsIServiceManager.h"
#include "nsReadableUtils.h"
#include "nsIObserverService.h"
#include "nsIWindowMediator.h"
#include "nsXPCOMCID.h"
#include "nsICategoryManager.h"
#include "nsIGenericFactory.h"
// just to do the reverse-lookup! sheesh.
#include "nsIInterfaceRequestorUtils.h"
#include "nsIDocShell.h"
PRUint32 nsWindowDataSource::windowCount = 0;
nsIRDFResource* nsWindowDataSource::kNC_Name = nsnull;
nsIRDFResource* nsWindowDataSource::kNC_WindowRoot = nsnull;
nsIRDFResource* nsWindowDataSource::kNC_KeyIndex = nsnull;
nsIRDFService* nsWindowDataSource::gRDFService = nsnull;
PRUint32 nsWindowDataSource::gRefCnt = 0;
static const char kURINC_WindowRoot[] = "NC:WindowMediatorRoot";
DEFINE_RDF_VOCAB(NC_NAMESPACE_URI, NC, Name);
DEFINE_RDF_VOCAB(NC_NAMESPACE_URI, NC, KeyIndex);
nsresult
nsWindowDataSource::Init()
{
nsresult rv;
if (gRefCnt++ == 0) {
rv = CallGetService("@mozilla.org/rdf/rdf-service;1", &gRDFService);
if (NS_FAILED(rv)) return rv;
gRDFService->GetResource(NS_LITERAL_CSTRING(kURINC_WindowRoot), &kNC_WindowRoot);
gRDFService->GetResource(NS_LITERAL_CSTRING(kURINC_Name), &kNC_Name);
gRDFService->GetResource(NS_LITERAL_CSTRING(kURINC_KeyIndex), &kNC_KeyIndex);
}
mInner = do_CreateInstance("@mozilla.org/rdf/datasource;1?name=in-memory-datasource", &rv);
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsIRDFContainerUtils> rdfc =
do_GetService("@mozilla.org/rdf/container-utils;1", &rv);
if (NS_FAILED(rv)) return rv;
rv = rdfc->MakeSeq(this, kNC_WindowRoot, getter_AddRefs(mContainer));
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsIWindowMediator> windowMediator =
do_GetService(NS_WINDOWMEDIATOR_CONTRACTID, &rv);
if (NS_FAILED(rv)) return rv;
rv = windowMediator->AddListener(this);
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsIObserverService> observerService =
do_GetService(NS_OBSERVERSERVICE_CONTRACTID, &rv);
if (NS_SUCCEEDED(rv)) {
rv = observerService->AddObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID,
PR_FALSE);
}
return NS_OK;
}
nsWindowDataSource::~nsWindowDataSource()
{
if (--gRefCnt == 0) {
NS_IF_RELEASE(kNC_Name);
NS_IF_RELEASE(kNC_KeyIndex);
NS_IF_RELEASE(kNC_WindowRoot);
NS_IF_RELEASE(gRDFService);
}
}
NS_IMETHODIMP
nsWindowDataSource::Observe(nsISupports *aSubject, const char* aTopic, const PRUnichar *aData)
{
if (strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID) == 0) {
// release these objects so that they release their reference
// to us
mContainer = nsnull;
mInner = nsnull;
}
return NS_OK;
}
NS_IMPL_CYCLE_COLLECTION_CLASS(nsWindowDataSource)
NS_IMPL_CYCLE_COLLECTION_UNLINK_0(nsWindowDataSource)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsWindowDataSource)
// XXX mContainer?
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_NSCOMPTR(mInner)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTING_ADDREF_AMBIGUOUS(nsWindowDataSource,
nsIObserver)
NS_IMPL_CYCLE_COLLECTING_RELEASE_AMBIGUOUS(nsWindowDataSource,
nsIObserver)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsWindowDataSource)
NS_INTERFACE_MAP_ENTRY(nsIObserver)
NS_INTERFACE_MAP_ENTRY(nsIWindowMediatorListener)
NS_INTERFACE_MAP_ENTRY(nsIWindowDataSource)
NS_INTERFACE_MAP_ENTRY(nsIRDFDataSource)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIObserver)
NS_INTERFACE_MAP_END
// nsIWindowMediatorListener implementation
// handle notifications from the window mediator and reflect them into
// RDF
/* void onWindowTitleChange (in nsIXULWindow window, in wstring newTitle); */
NS_IMETHODIMP
nsWindowDataSource::OnWindowTitleChange(nsIXULWindow *window,
const PRUnichar *newTitle)
{
nsresult rv;
nsVoidKey key(window);
nsCOMPtr<nsISupports> sup =
dont_AddRef(mWindowResources.Get(&key));
// oops, make sure this window is in the hashtable!
if (!sup) {
OnOpenWindow(window);
sup = dont_AddRef(mWindowResources.Get(&key));
}
NS_ENSURE_TRUE(sup, NS_ERROR_UNEXPECTED);
nsCOMPtr<nsIRDFResource> windowResource =
do_QueryInterface(sup);
nsCOMPtr<nsIRDFLiteral> newTitleLiteral;
rv = gRDFService->GetLiteral(newTitle, getter_AddRefs(newTitleLiteral));
NS_ENSURE_SUCCESS(rv, rv);
// get the old title
nsCOMPtr<nsIRDFNode> oldTitleNode;
rv = GetTarget(windowResource, kNC_Name, PR_TRUE,
getter_AddRefs(oldTitleNode));
// assert the change
if (NS_SUCCEEDED(rv) && oldTitleNode)
// has an existing window title, update it
rv = Change(windowResource, kNC_Name, oldTitleNode, newTitleLiteral);
else
// removed from the tasklist
rv = Assert(windowResource, kNC_Name, newTitleLiteral, PR_TRUE);
if (rv != NS_RDF_ASSERTION_ACCEPTED)
{
NS_ERROR("unable to set window name");
}
return NS_OK;
}
/* void onOpenWindow (in nsIXULWindow window); */
NS_IMETHODIMP
nsWindowDataSource::OnOpenWindow(nsIXULWindow *window)
{
nsCAutoString windowId(NS_LITERAL_CSTRING("window-"));
windowId.AppendInt(windowCount++, 10);
nsCOMPtr<nsIRDFResource> windowResource;
gRDFService->GetResource(windowId, getter_AddRefs(windowResource));
nsVoidKey key(window);
mWindowResources.Put(&key, windowResource);
// assert the new window
if (mContainer)
mContainer->AppendElement(windowResource);
return NS_OK;
}
/* void onCloseWindow (in nsIXULWindow window); */
NS_IMETHODIMP
nsWindowDataSource::OnCloseWindow(nsIXULWindow *window)
{
nsVoidKey key(window);
nsCOMPtr<nsIRDFResource> resource;
nsresult rv;
if (!mWindowResources.Remove(&key, getter_AddRefs(resource)))
return NS_ERROR_UNEXPECTED;
// make sure we're not shutting down
if (!mContainer) return NS_OK;
nsCOMPtr<nsIRDFNode> oldKeyNode;
nsCOMPtr<nsIRDFInt> oldKeyInt;
// get the old keyIndex, if any
rv = GetTarget(resource, kNC_KeyIndex, PR_TRUE,
getter_AddRefs(oldKeyNode));
if (NS_SUCCEEDED(rv) && (rv != NS_RDF_NO_VALUE))
oldKeyInt = do_QueryInterface(oldKeyNode);
// update RDF and keyindex - from this point forward we'll ignore
// errors, because they just indicate some kind of RDF inconsistency
PRInt32 winIndex = -1;
rv = mContainer->IndexOf(resource, &winIndex);
if (NS_FAILED(rv))
return NS_OK;
// unassert the old window, ignore any error
mContainer->RemoveElement(resource, PR_TRUE);
nsCOMPtr<nsISimpleEnumerator> children;
rv = mContainer->GetElements(getter_AddRefs(children));
if (NS_FAILED(rv))
return NS_OK;
PRBool more = PR_FALSE;
while (NS_SUCCEEDED(rv = children->HasMoreElements(&more)) && more) {
nsCOMPtr<nsISupports> sup;
rv = children->GetNext(getter_AddRefs(sup));
if (NS_FAILED(rv))
break;
nsCOMPtr<nsIRDFResource> windowResource = do_QueryInterface(sup, &rv);
if (NS_FAILED(rv))
continue;
PRInt32 currentIndex = -1;
mContainer->IndexOf(windowResource, &currentIndex);
// can skip updating windows with lower indexes
// than the window that was removed
if (currentIndex < winIndex)
continue;
nsCOMPtr<nsIRDFNode> newKeyNode;
nsCOMPtr<nsIRDFInt> newKeyInt;
rv = GetTarget(windowResource, kNC_KeyIndex, PR_TRUE,
getter_AddRefs(newKeyNode));
if (NS_SUCCEEDED(rv) && (rv != NS_RDF_NO_VALUE))
newKeyInt = do_QueryInterface(newKeyNode);
// changing from one key index to another
if (oldKeyInt && newKeyInt)
Change(windowResource, kNC_KeyIndex, oldKeyInt, newKeyInt);
// creating a new keyindex - probably window going
// from (none) to "9"
else if (newKeyInt)
Assert(windowResource, kNC_KeyIndex, newKeyInt, PR_TRUE);
// somehow inserting a window above this one,
// "9" to (none)
else if (oldKeyInt)
Unassert(windowResource, kNC_KeyIndex, oldKeyInt);
}
return NS_OK;
}
struct findWindowClosure {
nsIRDFResource* targetResource;
nsIXULWindow *resultWindow;
};
static PRBool
findWindow(nsHashKey* aKey, void *aData, void* aClosure)
{
nsVoidKey *thisKey = static_cast<nsVoidKey*>(aKey);
nsIRDFResource *resource =
static_cast<nsIRDFResource*>(aData);
findWindowClosure* closure =
static_cast<findWindowClosure*>(aClosure);
if (resource == closure->targetResource) {
closure->resultWindow =
static_cast<nsIXULWindow*>
(thisKey->GetValue());
return PR_FALSE; // stop enumerating
}
return PR_TRUE;
}
// nsIWindowDataSource implementation
NS_IMETHODIMP
nsWindowDataSource::GetWindowForResource(const char *aResourceString,
nsIDOMWindowInternal** aResult)
{
nsCOMPtr<nsIRDFResource> windowResource;
gRDFService->GetResource(nsDependentCString(aResourceString),
getter_AddRefs(windowResource));
// now reverse-lookup in the hashtable
findWindowClosure closure = { windowResource.get(), nsnull };
mWindowResources.Enumerate(findWindow, (void*)&closure);
if (closure.resultWindow) {
// this sucks, we have to jump through docshell to go from
// nsIXULWindow -> nsIDOMWindowInternal
nsCOMPtr<nsIDocShell> docShell;
closure.resultWindow->GetDocShell(getter_AddRefs(docShell));
if (docShell) {
nsCOMPtr<nsIDOMWindowInternal> result =
do_GetInterface(docShell);
*aResult = result;
NS_IF_ADDREF(*aResult);
}
}
return NS_OK;
}
// nsIRDFDataSource implementation
// mostly, we just forward to mInner, except:
// GetURI() - need to return "rdf:window-mediator"
// GetTarget() - need to handle kNC_KeyIndex
/* readonly attribute string URI; */
NS_IMETHODIMP nsWindowDataSource::GetURI(char * *aURI)
{
NS_ENSURE_ARG_POINTER(aURI);
*aURI = ToNewCString(NS_LITERAL_CSTRING("rdf:window-mediator"));
if (!*aURI)
return NS_ERROR_OUT_OF_MEMORY;
return NS_OK;
}
/* nsIRDFNode GetTarget (in nsIRDFResource aSource, in nsIRDFResource aProperty, in boolean aTruthValue); */
NS_IMETHODIMP nsWindowDataSource::GetTarget(nsIRDFResource *aSource, nsIRDFResource *aProperty, PRBool aTruthValue, nsIRDFNode **_retval)
{
NS_ENSURE_ARG_POINTER(_retval);
// add extra NULL checking for top-crash bug # 146466
if (!gRDFService) return NS_RDF_NO_VALUE;
if (!mInner) return NS_RDF_NO_VALUE;
if (!mContainer) return NS_RDF_NO_VALUE;
// special case kNC_KeyIndex before we forward to mInner
if (aProperty == kNC_KeyIndex) {
PRInt32 theIndex = 0;
nsresult rv = mContainer->IndexOf(aSource, &theIndex);
if (NS_FAILED(rv)) return rv;
// only allow the range of 1 to 9 for single key access
if (theIndex < 1 || theIndex > 9) return(NS_RDF_NO_VALUE);
nsCOMPtr<nsIRDFInt> indexInt;
rv = gRDFService->GetIntLiteral(theIndex, getter_AddRefs(indexInt));
if (NS_FAILED(rv)) return(rv);
if (!indexInt) return(NS_ERROR_FAILURE);
return CallQueryInterface(indexInt, _retval);
}
return mInner->GetTarget(aSource, aProperty, aTruthValue, _retval);
}
/* nsIRDFResource GetSource (in nsIRDFResource aProperty, in nsIRDFNode aTarget, in boolean aTruthValue); */
NS_IMETHODIMP nsWindowDataSource::GetSource(nsIRDFResource *aProperty, nsIRDFNode *aTarget, PRBool aTruthValue, nsIRDFResource **_retval)
{
if (mInner)
return mInner->GetSource(aProperty, aTarget, aTruthValue, _retval);
return NS_OK;
}
/* nsISimpleEnumerator GetSources (in nsIRDFResource aProperty, in nsIRDFNode aTarget, in boolean aTruthValue); */
NS_IMETHODIMP nsWindowDataSource::GetSources(nsIRDFResource *aProperty, nsIRDFNode *aTarget, PRBool aTruthValue, nsISimpleEnumerator **_retval)
{
if (mInner)
return mInner->GetSources(aProperty, aTarget, aTruthValue, _retval);
return NS_OK;
}
/* nsISimpleEnumerator GetTargets (in nsIRDFResource aSource, in nsIRDFResource aProperty, in boolean aTruthValue); */
NS_IMETHODIMP nsWindowDataSource::GetTargets(nsIRDFResource *aSource, nsIRDFResource *aProperty, PRBool aTruthValue, nsISimpleEnumerator **_retval)
{
if (mInner)
return mInner->GetTargets(aSource, aProperty, aTruthValue, _retval);
return NS_OK;
}
/* void Assert (in nsIRDFResource aSource, in nsIRDFResource aProperty, in nsIRDFNode aTarget, in boolean aTruthValue); */
NS_IMETHODIMP nsWindowDataSource::Assert(nsIRDFResource *aSource, nsIRDFResource *aProperty, nsIRDFNode *aTarget, PRBool aTruthValue)
{
if (mInner)
return mInner->Assert(aSource, aProperty, aTarget, aTruthValue);
return NS_OK;
}
/* void Unassert (in nsIRDFResource aSource, in nsIRDFResource aProperty, in nsIRDFNode aTarget); */
NS_IMETHODIMP nsWindowDataSource::Unassert(nsIRDFResource *aSource, nsIRDFResource *aProperty, nsIRDFNode *aTarget)
{
if (mInner)
return mInner->Unassert(aSource, aProperty, aTarget);
return NS_OK;
}
/* void Change (in nsIRDFResource aSource, in nsIRDFResource aProperty, in nsIRDFNode aOldTarget, in nsIRDFNode aNewTarget); */
NS_IMETHODIMP nsWindowDataSource::Change(nsIRDFResource *aSource, nsIRDFResource *aProperty, nsIRDFNode *aOldTarget, nsIRDFNode *aNewTarget)
{
if (mInner)
return mInner->Change(aSource, aProperty, aOldTarget, aNewTarget);
return NS_OK;
}
/* void Move (in nsIRDFResource aOldSource, in nsIRDFResource aNewSource, in nsIRDFResource aProperty, in nsIRDFNode aTarget); */
NS_IMETHODIMP nsWindowDataSource::Move(nsIRDFResource *aOldSource, nsIRDFResource *aNewSource, nsIRDFResource *aProperty, nsIRDFNode *aTarget)
{
if (mInner)
return mInner->Move(aOldSource, aNewSource, aProperty, aTarget);
return NS_OK;
}
/* boolean HasAssertion (in nsIRDFResource aSource, in nsIRDFResource aProperty, in nsIRDFNode aTarget, in boolean aTruthValue); */
NS_IMETHODIMP nsWindowDataSource::HasAssertion(nsIRDFResource *aSource, nsIRDFResource *aProperty, nsIRDFNode *aTarget, PRBool aTruthValue, PRBool *_retval)
{
if (mInner)
return mInner->HasAssertion(aSource, aProperty, aTarget, aTruthValue, _retval);
return NS_OK;
}
/* void AddObserver (in nsIRDFObserver aObserver); */
NS_IMETHODIMP nsWindowDataSource::AddObserver(nsIRDFObserver *aObserver)
{
if (mInner)
return mInner->AddObserver(aObserver);
return NS_OK;
}
/* void RemoveObserver (in nsIRDFObserver aObserver); */
NS_IMETHODIMP nsWindowDataSource::RemoveObserver(nsIRDFObserver *aObserver)
{
if (mInner)
return mInner->RemoveObserver(aObserver);
return NS_OK;
}
/* nsISimpleEnumerator ArcLabelsIn (in nsIRDFNode aNode); */
NS_IMETHODIMP nsWindowDataSource::ArcLabelsIn(nsIRDFNode *aNode, nsISimpleEnumerator **_retval)
{
if (mInner)
return mInner->ArcLabelsIn(aNode, _retval);
return NS_OK;
}
/* nsISimpleEnumerator ArcLabelsOut (in nsIRDFResource aSource); */
NS_IMETHODIMP nsWindowDataSource::ArcLabelsOut(nsIRDFResource *aSource, nsISimpleEnumerator **_retval)
{
if (mInner)
return mInner->ArcLabelsOut(aSource, _retval);
return NS_OK;
}
/* nsISimpleEnumerator GetAllResources (); */
NS_IMETHODIMP nsWindowDataSource::GetAllResources(nsISimpleEnumerator **_retval)
{
if (mInner)
return mInner->GetAllResources(_retval);
return NS_OK;
}
/* boolean IsCommandEnabled (in nsISupportsArray aSources, in nsIRDFResource aCommand, in nsISupportsArray aArguments); */
NS_IMETHODIMP nsWindowDataSource::IsCommandEnabled(nsISupportsArray *aSources, nsIRDFResource *aCommand, nsISupportsArray *aArguments, PRBool *_retval)
{
if (mInner)
return mInner->IsCommandEnabled(aSources, aCommand, aArguments, _retval);
return NS_OK;
}
/* void DoCommand (in nsISupportsArray aSources, in nsIRDFResource aCommand, in nsISupportsArray aArguments); */
NS_IMETHODIMP nsWindowDataSource::DoCommand(nsISupportsArray *aSources, nsIRDFResource *aCommand, nsISupportsArray *aArguments)
{
if (mInner)
return mInner->DoCommand(aSources, aCommand, aArguments);
return NS_OK;
}
/* nsISimpleEnumerator GetAllCmds (in nsIRDFResource aSource); */
NS_IMETHODIMP nsWindowDataSource::GetAllCmds(nsIRDFResource *aSource, nsISimpleEnumerator **_retval)
{
if (mInner)
return mInner->GetAllCmds(aSource, _retval);
return NS_OK;
}
/* boolean hasArcIn (in nsIRDFNode aNode, in nsIRDFResource aArc); */
NS_IMETHODIMP nsWindowDataSource::HasArcIn(nsIRDFNode *aNode, nsIRDFResource *aArc, PRBool *_retval)
{
if (mInner)
return mInner->HasArcIn(aNode, aArc, _retval);
return NS_OK;
}
/* boolean hasArcOut (in nsIRDFResource aSource, in nsIRDFResource aArc); */
NS_IMETHODIMP nsWindowDataSource::HasArcOut(nsIRDFResource *aSource, nsIRDFResource *aArc, PRBool *_retval)
{
if (mInner)
return mInner->HasArcOut(aSource, aArc, _retval);
return NS_OK;
}
/* void beginUpdateBatch (); */
NS_IMETHODIMP nsWindowDataSource::BeginUpdateBatch()
{
if (mInner)
return mInner->BeginUpdateBatch();
return NS_OK;
}
/* void endUpdateBatch (); */
NS_IMETHODIMP nsWindowDataSource::EndUpdateBatch()
{
if (mInner)
return mInner->EndUpdateBatch();
return NS_OK;
}
// The module goop
NS_GENERIC_FACTORY_CONSTRUCTOR_INIT(nsWindowDataSource, Init)
static NS_METHOD
RegisterWindowDS(nsIComponentManager *aCompMgr,
nsIFile *aPath,
const char *registryLocation,
const char *componentType,
const nsModuleComponentInfo *info)
{
nsresult rv;
nsCOMPtr<nsICategoryManager> catman = do_GetService(NS_CATEGORYMANAGER_CONTRACTID, &rv);
if (NS_FAILED(rv)) return rv;
return catman->AddCategoryEntry("app-startup", "Window Data Source",
"service," NS_RDF_DATASOURCE_CONTRACTID_PREFIX "window-mediator",
PR_TRUE, PR_TRUE, nsnull);
return NS_OK;
}
static const nsModuleComponentInfo components[] = {
{ "nsWindowDataSource",
NS_WINDOWDATASOURCE_CID,
NS_RDF_DATASOURCE_CONTRACTID_PREFIX "window-mediator",
nsWindowDataSourceConstructor, RegisterWindowDS }
};
NS_IMPL_NSGETMODULE(nsWindowDataSourceModule, components)
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