summaryrefslogtreecommitdiff
path: root/dom/svg/DOMSVGStringList.cpp
blob: df358d990927fd00f407286ec2d5b32629f8eb3f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "DOMSVGStringList.h"

#include "mozilla/dom/SVGStringListBinding.h"
#include "mozilla/dom/SVGTests.h"
#include "nsError.h"
#include "nsCOMPtr.h"
#include "nsSVGAttrTearoffTable.h"
#include "nsQueryObject.h"
#include <algorithm>

// See the architecture comment in this file's header.

namespace mozilla {

using namespace dom;

static inline
nsSVGAttrTearoffTable<SVGStringList, DOMSVGStringList>&
SVGStringListTearoffTable()
{
  static nsSVGAttrTearoffTable<SVGStringList, DOMSVGStringList>
    sSVGStringListTearoffTable;
  return sSVGStringListTearoffTable;
}

NS_SVG_VAL_IMPL_CYCLE_COLLECTION_WRAPPERCACHED(DOMSVGStringList, mElement)

NS_IMPL_CYCLE_COLLECTING_ADDREF(DOMSVGStringList)
NS_IMPL_CYCLE_COLLECTING_RELEASE(DOMSVGStringList)

NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(DOMSVGStringList)
  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
  NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END

//----------------------------------------------------------------------
// Helper class: AutoChangeStringListNotifier
// Stack-based helper class to pair calls to WillChangeStringListList and
// DidChangeStringListList.
class MOZ_RAII AutoChangeStringListNotifier
{
public:
  explicit AutoChangeStringListNotifier(DOMSVGStringList* aStringList MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
    : mStringList(aStringList)
  {
    MOZ_GUARD_OBJECT_NOTIFIER_INIT;
    MOZ_ASSERT(mStringList, "Expecting non-null stringList");
    mEmptyOrOldValue =
      mStringList->mElement->WillChangeStringList(mStringList->mIsConditionalProcessingAttribute,
                                                  mStringList->mAttrEnum);
  }

  ~AutoChangeStringListNotifier()
  {
    mStringList->mElement->DidChangeStringList(mStringList->mIsConditionalProcessingAttribute,
                                               mStringList->mAttrEnum, mEmptyOrOldValue);
  }

private:
  DOMSVGStringList* const mStringList;
  nsAttrValue       mEmptyOrOldValue;
  MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
};

/* static */ already_AddRefed<DOMSVGStringList>
DOMSVGStringList::GetDOMWrapper(SVGStringList *aList,
                                nsSVGElement *aElement,
                                bool aIsConditionalProcessingAttribute,
                                uint8_t aAttrEnum)
{
  RefPtr<DOMSVGStringList> wrapper =
    SVGStringListTearoffTable().GetTearoff(aList);
  if (!wrapper) {
    wrapper = new DOMSVGStringList(aElement, 
                                   aIsConditionalProcessingAttribute,
                                   aAttrEnum);
    SVGStringListTearoffTable().AddTearoff(aList, wrapper);
  }
  return wrapper.forget();
}

DOMSVGStringList::~DOMSVGStringList()
{
  // Script no longer has any references to us.
  SVGStringListTearoffTable().RemoveTearoff(&InternalList());
}

/* virtual */ JSObject*
DOMSVGStringList::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
  return SVGStringListBinding::Wrap(aCx, this, aGivenProto);
}

// ----------------------------------------------------------------------------
// SVGStringList implementation:

uint32_t
DOMSVGStringList::NumberOfItems() const
{
  return InternalList().Length();
}

uint32_t
DOMSVGStringList::Length() const
{
  return NumberOfItems();
}

void
DOMSVGStringList::Clear()
{
  if (InternalList().IsExplicitlySet()) {
    AutoChangeStringListNotifier notifier(this);
    InternalList().Clear();
  }
}

void
DOMSVGStringList::Initialize(const nsAString& aNewItem, nsAString& aRetval,
                             ErrorResult& aRv)
{
  if (InternalList().IsExplicitlySet()) {
    InternalList().Clear();
  }
  InsertItemBefore(aNewItem, 0, aRetval, aRv);
}

void
DOMSVGStringList::GetItem(uint32_t aIndex, nsAString& aRetval, ErrorResult& aRv)
{
  bool found;
  IndexedGetter(aIndex, found, aRetval);
  if (!found) {
    aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
  }
}

void
DOMSVGStringList::IndexedGetter(uint32_t aIndex, bool& aFound,
                                nsAString& aRetval)
{
  aFound = aIndex < InternalList().Length();
  if (aFound) {
    aRetval = InternalList()[aIndex];
  }
}

void
DOMSVGStringList::InsertItemBefore(const nsAString& aNewItem, uint32_t aIndex,
                                   nsAString& aRetval, ErrorResult& aRv)
{
  if (aNewItem.IsEmpty()) {
    aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR);
    return;
  }
  aIndex = std::min(aIndex, InternalList().Length());

  // Ensure we have enough memory so we can avoid complex error handling below:
  if (!InternalList().SetCapacity(InternalList().Length() + 1)) {
    aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
    return;
  }

  AutoChangeStringListNotifier notifier(this);
  InternalList().InsertItem(aIndex, aNewItem);
  aRetval = aNewItem;
}

void
DOMSVGStringList::ReplaceItem(const nsAString& aNewItem, uint32_t aIndex,
                              nsAString& aRetval, ErrorResult& aRv)
{
  if (aNewItem.IsEmpty()) {
    aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR);
    return;
  }
  if (aIndex >= InternalList().Length()) {
    aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
    return;
  }

  aRetval = InternalList()[aIndex];
  AutoChangeStringListNotifier notifier(this);
  InternalList().ReplaceItem(aIndex, aNewItem);
}

void
DOMSVGStringList::RemoveItem(uint32_t aIndex, nsAString& aRetval,
                             ErrorResult& aRv)
{
  if (aIndex >= InternalList().Length()) {
    aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
    return;
  }

  AutoChangeStringListNotifier notifier(this);
  InternalList().RemoveItem(aIndex);
}

void
DOMSVGStringList::AppendItem(const nsAString& aNewItem, nsAString& aRetval,
                             ErrorResult& aRv)
{
  InsertItemBefore(aNewItem, InternalList().Length(), aRetval, aRv);
}

SVGStringList &
DOMSVGStringList::InternalList() const
{
  if (mIsConditionalProcessingAttribute) {
    nsCOMPtr<dom::SVGTests> tests = do_QueryObject(mElement.get());
    return tests->mStringListAttributes[mAttrEnum];
  }
  return mElement->GetStringListInfo().mStringLists[mAttrEnum];
}

} // namespace mozilla