1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
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 #include "nsISVGPoint.h"
8 #include "DOMSVGPointList.h"
9 #include "SVGPoint.h"
10 #include "nsSVGElement.h"
11 #include "nsError.h"
12 #include "mozilla/dom/SVGPointBinding.h"
13
14 // See the architecture comment in DOMSVGPointList.h.
15
16 using namespace mozilla;
17
18 // We could use NS_IMPL_CYCLE_COLLECTION(, except that in Unlink() we need to
19 // clear our list's weak ref to us to be safe. (The other option would be to
20 // not unlink and rely on the breaking of the other edges in the cycle, as
21 // NS_SVG_VAL_IMPL_CYCLE_COLLECTION does.)
22 NS_IMPL_CYCLE_COLLECTION_CLASS(nsISVGPoint)
23
24 NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsISVGPoint)
25 // We may not belong to a list, so we must null check tmp->mList.
26 if (tmp->mList) {
27 tmp->mList->mItems[tmp->mListIndex] = nullptr;
28 }
NS_IMPL_CYCLE_COLLECTION_UNLINK(mList)29 NS_IMPL_CYCLE_COLLECTION_UNLINK(mList)
30 NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
31 NS_IMPL_CYCLE_COLLECTION_UNLINK_END
32
33 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsISVGPoint)
34 NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mList)
35 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
36 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
37
38 NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(nsISVGPoint)
39 NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER
40 NS_IMPL_CYCLE_COLLECTION_TRACE_END
41
42 NS_IMPL_CYCLE_COLLECTING_ADDREF(nsISVGPoint)
43 NS_IMPL_CYCLE_COLLECTING_RELEASE(nsISVGPoint)
44
45 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsISVGPoint)
46 NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
47 NS_INTERFACE_MAP_ENTRY(nsISVGPoint)
48 NS_INTERFACE_MAP_ENTRY(nsISupports)
49 NS_INTERFACE_MAP_END
50
51 void
52 nsISVGPoint::InsertingIntoList(DOMSVGPointList *aList,
53 uint32_t aListIndex,
54 bool aIsAnimValItem)
55 {
56 MOZ_ASSERT(!HasOwner(), "Inserting item that already has an owner");
57
58 mList = aList;
59 mListIndex = aListIndex;
60 mIsReadonly = false;
61 mIsAnimValItem = aIsAnimValItem;
62
63 MOZ_ASSERT(IndexIsValid(), "Bad index for DOMSVGPoint!");
64 }
65
66 void
RemovingFromList()67 nsISVGPoint::RemovingFromList()
68 {
69 mPt = InternalItem();
70 mList = nullptr;
71 MOZ_ASSERT(!mIsReadonly, "mIsReadonly set for list");
72 mIsAnimValItem = false;
73 }
74
75 SVGPoint&
InternalItem()76 nsISVGPoint::InternalItem()
77 {
78 return mList->InternalList().mItems[mListIndex];
79 }
80
81 #ifdef DEBUG
82 bool
IndexIsValid()83 nsISVGPoint::IndexIsValid()
84 {
85 return mListIndex < mList->InternalList().Length();
86 }
87 #endif
88
89