1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
2 *
3 * This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6
7 /*
8
9 A package of routines shared by the XUL content code.
10
11 */
12
13 #include "mozilla/ArrayUtils.h"
14
15 #include "nsCollationCID.h"
16 #include "nsCOMPtr.h"
17 #include "nsIContent.h"
18 #include "nsICollation.h"
19 #include "mozilla/dom/Document.h"
20 #include "nsXULContentUtils.h"
21 #include "nsLayoutCID.h"
22 #include "nsString.h"
23 #include "nsGkAtoms.h"
24
25 using namespace mozilla;
26
27 //------------------------------------------------------------------------
28
29 nsICollation* nsXULContentUtils::gCollation;
30
31 //------------------------------------------------------------------------
32 // Constructors n' stuff
33 //
34
Finish()35 nsresult nsXULContentUtils::Finish() {
36 NS_IF_RELEASE(gCollation);
37
38 return NS_OK;
39 }
40
GetCollation()41 nsICollation* nsXULContentUtils::GetCollation() {
42 if (!gCollation) {
43 nsCOMPtr<nsICollationFactory> colFactory =
44 do_CreateInstance(NS_COLLATIONFACTORY_CONTRACTID);
45 if (colFactory) {
46 DebugOnly<nsresult> rv = colFactory->CreateCollation(&gCollation);
47 NS_ASSERTION(NS_SUCCEEDED(rv), "couldn't create collation instance");
48 } else
49 NS_ERROR("couldn't create instance of collation factory");
50 }
51
52 return gCollation;
53 }
54
55 //------------------------------------------------------------------------
56 //
57
FindChildByTag(nsIContent * aElement,int32_t aNameSpaceID,nsAtom * aTag,Element ** aResult)58 nsresult nsXULContentUtils::FindChildByTag(nsIContent* aElement,
59 int32_t aNameSpaceID, nsAtom* aTag,
60 Element** aResult) {
61 for (nsIContent* child = aElement->GetFirstChild(); child;
62 child = child->GetNextSibling()) {
63 if (child->IsElement() && child->NodeInfo()->Equals(aTag, aNameSpaceID)) {
64 NS_ADDREF(*aResult = child->AsElement());
65 return NS_OK;
66 }
67 }
68
69 *aResult = nullptr;
70 return NS_RDF_NO_VALUE; // not found
71 }
72