summaryrefslogtreecommitdiffstats
path: root/dom/svg/nsSVGEnum.cpp
blob: cf27bd2bb24c87bf257ffee607c2a37282891351 (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
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "nsError.h"
#include "nsSVGAttrTearoffTable.h"
#include "nsSVGEnum.h"
#include "nsIAtom.h"
#include "nsSVGElement.h"
#include "nsSMILValue.h"
#include "SMILEnumType.h"

using namespace mozilla;
using namespace mozilla::dom;

static nsSVGAttrTearoffTable<nsSVGEnum, nsSVGEnum::DOMAnimatedEnum>
  sSVGAnimatedEnumTearoffTable;

nsSVGEnumMapping *
nsSVGEnum::GetMapping(nsSVGElement *aSVGElement)
{
  nsSVGElement::EnumAttributesInfo info = aSVGElement->GetEnumInfo();

  NS_ASSERTION(info.mEnumCount > 0 && mAttrEnum < info.mEnumCount,
               "mapping request for a non-attrib enum");

  return info.mEnumInfo[mAttrEnum].mMapping;
}

nsresult
nsSVGEnum::SetBaseValueAtom(const nsIAtom* aValue, nsSVGElement *aSVGElement)
{
  nsSVGEnumMapping *mapping = GetMapping(aSVGElement);

  while (mapping && mapping->mKey) {
    if (aValue == *(mapping->mKey)) {
      mIsBaseSet = true;
      if (mBaseVal != mapping->mVal) {
        mBaseVal = mapping->mVal;
        if (!mIsAnimated) {
          mAnimVal = mBaseVal;
        }
        else {
          aSVGElement->AnimationNeedsResample();
        }
        // We don't need to call DidChange* here - we're only called by
        // nsSVGElement::ParseAttribute under Element::SetAttr,
        // which takes care of notifying.
      }
      return NS_OK;
    }
    mapping++;
  }

  // only a warning since authors may mistype attribute values
  NS_WARNING("unknown enumeration key");
  return NS_ERROR_DOM_SYNTAX_ERR;
}

nsIAtom*
nsSVGEnum::GetBaseValueAtom(nsSVGElement *aSVGElement)
{
  nsSVGEnumMapping *mapping = GetMapping(aSVGElement);

  while (mapping && mapping->mKey) {
    if (mBaseVal == mapping->mVal) {
      return *mapping->mKey;
    }
    mapping++;
  }
  NS_ERROR("unknown enumeration value");
  return nsGkAtoms::_empty;
}

nsresult
nsSVGEnum::SetBaseValue(uint16_t aValue,
                        nsSVGElement *aSVGElement)
{
  nsSVGEnumMapping *mapping = GetMapping(aSVGElement);

  while (mapping && mapping->mKey) {
    if (mapping->mVal == aValue) {
      mIsBaseSet = true;
      if (mBaseVal != uint8_t(aValue)) {
        mBaseVal = uint8_t(aValue);
        if (!mIsAnimated) {
          mAnimVal = mBaseVal;
        }
        else {
          aSVGElement->AnimationNeedsResample();
        }
        aSVGElement->DidChangeEnum(mAttrEnum);
      }
      return NS_OK;
    }
    mapping++;
  }
  return NS_ERROR_DOM_SYNTAX_ERR;
}

void
nsSVGEnum::SetAnimValue(uint16_t aValue, nsSVGElement *aSVGElement)
{
  if (mIsAnimated && aValue == mAnimVal) {
    return;
  }
  mAnimVal = aValue;
  mIsAnimated = true;
  aSVGElement->DidAnimateEnum(mAttrEnum);
}

already_AddRefed<SVGAnimatedEnumeration>
nsSVGEnum::ToDOMAnimatedEnum(nsSVGElement* aSVGElement)
{
  RefPtr<DOMAnimatedEnum> domAnimatedEnum =
    sSVGAnimatedEnumTearoffTable.GetTearoff(this);
  if (!domAnimatedEnum) {
    domAnimatedEnum = new DOMAnimatedEnum(this, aSVGElement);
    sSVGAnimatedEnumTearoffTable.AddTearoff(this, domAnimatedEnum);
  }

  return domAnimatedEnum.forget();
}

nsSVGEnum::DOMAnimatedEnum::~DOMAnimatedEnum()
{
  sSVGAnimatedEnumTearoffTable.RemoveTearoff(mVal);
}

nsISMILAttr*
nsSVGEnum::ToSMILAttr(nsSVGElement *aSVGElement)
{
  return new SMILEnum(this, aSVGElement);
}

nsresult
nsSVGEnum::SMILEnum::ValueFromString(const nsAString& aStr,
                                     const dom::SVGAnimationElement* /*aSrcElement*/,
                                     nsSMILValue& aValue,
                                     bool& aPreventCachingOfSandwich) const
{
  nsIAtom *valAtom = NS_GetStaticAtom(aStr);
  if (valAtom) {
    nsSVGEnumMapping *mapping = mVal->GetMapping(mSVGElement);

    while (mapping && mapping->mKey) {
      if (valAtom == *(mapping->mKey)) {
        nsSMILValue val(SMILEnumType::Singleton());
        val.mU.mUint = mapping->mVal;
        aValue = val;
        aPreventCachingOfSandwich = false;
        return NS_OK;
      }
      mapping++;
    }
  }
  
  // only a warning since authors may mistype attribute values
  NS_WARNING("unknown enumeration key");
  return NS_ERROR_FAILURE;
}

nsSMILValue
nsSVGEnum::SMILEnum::GetBaseValue() const
{
  nsSMILValue val(SMILEnumType::Singleton());
  val.mU.mUint = mVal->mBaseVal;
  return val;
}

void
nsSVGEnum::SMILEnum::ClearAnimValue()
{
  if (mVal->mIsAnimated) {
    mVal->mIsAnimated = false;
    mVal->mAnimVal = mVal->mBaseVal;
    mSVGElement->DidAnimateEnum(mVal->mAttrEnum);
  }
}

nsresult
nsSVGEnum::SMILEnum::SetAnimValue(const nsSMILValue& aValue)
{
  NS_ASSERTION(aValue.mType == SMILEnumType::Singleton(),
               "Unexpected type to assign animated value");
  if (aValue.mType == SMILEnumType::Singleton()) {
    MOZ_ASSERT(aValue.mU.mUint <= USHRT_MAX,
               "Very large enumerated value - too big for uint16_t");
    mVal->SetAnimValue(uint16_t(aValue.mU.mUint), mSVGElement);
  }
  return NS_OK;
}