gecko-dev/dom/xul/nsXULContentUtils.cpp
Kris Maglione 3d65fdbc34 Bug 833098: Part 2 - Remove RDF service. r=hsivonen,Mossop,pike
MozReview-Commit-ID: 32Nl5McAFGJ

--HG--
extra : source : c00426f6bc7d1a10e5609ac9530eb315d64d9d85
extra : histedit_source : 4ab49fa208d0fc0ccd8e0b623644cc91d705d462
2018-04-28 20:06:40 -07:00

134 lines
3.5 KiB
C++

/* -*- 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/. */
/*
A package of routines shared by the XUL content code.
*/
#include "mozilla/ArrayUtils.h"
#include "nsCollationCID.h"
#include "nsCOMPtr.h"
#include "nsIContent.h"
#include "nsICollation.h"
#include "nsIDocument.h"
#include "nsIDOMXULCommandDispatcher.h"
#include "nsIServiceManager.h"
#include "nsXULContentUtils.h"
#include "nsLayoutCID.h"
#include "nsString.h"
#include "nsGkAtoms.h"
#include "XULDocument.h"
using namespace mozilla;
using dom::XULDocument;
//------------------------------------------------------------------------
nsICollation *nsXULContentUtils::gCollation;
//------------------------------------------------------------------------
// Constructors n' stuff
//
nsresult
nsXULContentUtils::Finish()
{
NS_IF_RELEASE(gCollation);
return NS_OK;
}
nsICollation*
nsXULContentUtils::GetCollation()
{
if (!gCollation) {
nsCOMPtr<nsICollationFactory> colFactory =
do_CreateInstance(NS_COLLATIONFACTORY_CONTRACTID);
if (colFactory) {
DebugOnly<nsresult> rv = colFactory->CreateCollation(&gCollation);
NS_ASSERTION(NS_SUCCEEDED(rv),
"couldn't create collation instance");
} else
NS_ERROR("couldn't create instance of collation factory");
}
return gCollation;
}
//------------------------------------------------------------------------
//
nsresult
nsXULContentUtils::FindChildByTag(nsIContent* aElement,
int32_t aNameSpaceID,
nsAtom* aTag,
Element** aResult)
{
for (nsIContent* child = aElement->GetFirstChild();
child;
child = child->GetNextSibling()) {
if (child->IsElement() &&
child->NodeInfo()->Equals(aTag, aNameSpaceID)) {
NS_ADDREF(*aResult = child->AsElement());
return NS_OK;
}
}
*aResult = nullptr;
return NS_RDF_NO_VALUE; // not found
}
nsresult
nsXULContentUtils::SetCommandUpdater(nsIDocument* aDocument, Element* aElement)
{
// Deal with setting up a 'commandupdater'. Pulls the 'events' and
// 'targets' attributes off of aElement, and adds it to the
// document's command dispatcher.
MOZ_ASSERT(aDocument != nullptr, "null ptr");
if (! aDocument)
return NS_ERROR_NULL_POINTER;
MOZ_ASSERT(aElement != nullptr, "null ptr");
if (! aElement)
return NS_ERROR_NULL_POINTER;
nsresult rv;
NS_ASSERTION(aDocument->IsXULDocument(), "not a xul document");
if (! aDocument->IsXULDocument())
return NS_ERROR_UNEXPECTED;
XULDocument* xuldoc = aDocument->AsXULDocument();
nsCOMPtr<nsIDOMXULCommandDispatcher> dispatcher =
xuldoc->GetCommandDispatcher();
NS_ASSERTION(dispatcher != nullptr, "no dispatcher");
if (! dispatcher)
return NS_ERROR_UNEXPECTED;
nsAutoString events;
aElement->GetAttr(kNameSpaceID_None, nsGkAtoms::events, events);
if (events.IsEmpty())
events.Assign('*');
nsAutoString targets;
aElement->GetAttr(kNameSpaceID_None, nsGkAtoms::targets, targets);
if (targets.IsEmpty())
targets.Assign('*');
rv = dispatcher->AddCommandUpdater(aElement, events, targets);
if (NS_FAILED(rv)) return rv;
return NS_OK;
}