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
|
/* -*- Mode: C++; tab-width: 2; 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/. */
/* DOM object for element.style */
#include "nsDOMCSSAttrDeclaration.h"
#include "mozilla/css/Declaration.h"
#include "mozilla/css/StyleRule.h"
#include "mozilla/dom/Element.h"
#include "nsIDocument.h"
#include "nsIDOMMutationEvent.h"
#include "nsIURI.h"
#include "nsNodeUtils.h"
#include "nsWrapperCacheInlines.h"
#include "nsIFrame.h"
#include "ActiveLayerTracker.h"
using namespace mozilla;
nsDOMCSSAttributeDeclaration::nsDOMCSSAttributeDeclaration(dom::Element* aElement,
bool aIsSMILOverride)
: mElement(aElement)
, mIsSMILOverride(aIsSMILOverride)
{
MOZ_COUNT_CTOR(nsDOMCSSAttributeDeclaration);
NS_ASSERTION(aElement, "Inline style for a NULL element?");
}
nsDOMCSSAttributeDeclaration::~nsDOMCSSAttributeDeclaration()
{
MOZ_COUNT_DTOR(nsDOMCSSAttributeDeclaration);
}
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(nsDOMCSSAttributeDeclaration, mElement)
// mElement holds a strong ref to us, so if it's going to be
// skipped, the attribute declaration can't be part of a garbage
// cycle.
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_BEGIN(nsDOMCSSAttributeDeclaration)
if (tmp->mElement && Element::CanSkip(tmp->mElement, true)) {
if (tmp->PreservingWrapper()) {
// This marks the wrapper black.
tmp->GetWrapper();
}
return true;
}
return tmp->IsBlack();
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_END
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_BEGIN(nsDOMCSSAttributeDeclaration)
return tmp->IsBlack() ||
(tmp->mElement && Element::CanSkipInCC(tmp->mElement));
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_END
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_BEGIN(nsDOMCSSAttributeDeclaration)
return tmp->IsBlack() ||
(tmp->mElement && Element::CanSkipThis(tmp->mElement));
NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsDOMCSSAttributeDeclaration)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_IMPL_QUERY_TAIL_INHERITING(nsDOMCSSDeclaration)
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsDOMCSSAttributeDeclaration)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsDOMCSSAttributeDeclaration)
nsresult
nsDOMCSSAttributeDeclaration::SetCSSDeclaration(DeclarationBlock* aDecl)
{
NS_ASSERTION(mElement, "Must have Element to set the declaration!");
return mIsSMILOverride
? mElement->SetSMILOverrideStyleDeclaration(aDecl, true)
: mElement->SetInlineStyleDeclaration(aDecl, nullptr, true);
}
nsIDocument*
nsDOMCSSAttributeDeclaration::DocToUpdate()
{
// We need OwnerDoc() rather than GetUncomposedDoc() because it might
// be the BeginUpdate call that inserts mElement into the document.
return mElement->OwnerDoc();
}
DeclarationBlock*
nsDOMCSSAttributeDeclaration::GetCSSDeclaration(Operation aOperation)
{
if (!mElement)
return nullptr;
DeclarationBlock* declaration;
if (mIsSMILOverride) {
declaration = mElement->GetSMILOverrideStyleDeclaration();
} else {
declaration = mElement->GetInlineStyleDeclaration();
}
// Notify observers that our style="" attribute is going to change
// unless:
// * this is a declaration that holds SMIL animation values (which
// aren't reflected in the DOM style="" attribute), or
// * we're getting the declaration for reading, or
// * we're getting it for property removal but we don't currently have
// a declaration.
// XXXbz this is a bit of a hack, especially doing it before the
// BeginUpdate(), but this is a good chokepoint where we know we
// plan to modify the CSSDeclaration, so need to notify
// AttributeWillChange if this is inline style.
if (!mIsSMILOverride &&
((aOperation == eOperation_Modify) ||
(aOperation == eOperation_RemoveProperty && declaration))) {
nsNodeUtils::AttributeWillChange(mElement, kNameSpaceID_None,
nsGkAtoms::style,
nsIDOMMutationEvent::MODIFICATION,
nullptr);
}
if (declaration) {
return declaration;
}
if (aOperation != eOperation_Modify) {
return nullptr;
}
// cannot fail
RefPtr<DeclarationBlock> decl;
if (mElement->IsStyledByServo()) {
decl = new ServoDeclarationBlock();
} else {
decl = new css::Declaration();
decl->AsGecko()->InitializeEmpty();
}
// this *can* fail (inside SetAttrAndNotify, at least).
nsresult rv;
if (mIsSMILOverride) {
rv = mElement->SetSMILOverrideStyleDeclaration(decl, false);
} else {
rv = mElement->SetInlineStyleDeclaration(decl, nullptr, false);
}
if (NS_FAILED(rv)) {
return nullptr; // the decl will be destroyed along with the style rule
}
return decl;
}
void
nsDOMCSSAttributeDeclaration::GetCSSParsingEnvironment(CSSParsingEnvironment& aCSSParseEnv)
{
NS_ASSERTION(mElement, "Something is severely broken -- there should be an Element here!");
nsIDocument* doc = mElement->OwnerDoc();
aCSSParseEnv.mSheetURI = doc->GetDocumentURI();
aCSSParseEnv.mBaseURI = mElement->GetBaseURI();
aCSSParseEnv.mPrincipal = mElement->NodePrincipal();
aCSSParseEnv.mCSSLoader = doc->CSSLoader();
}
NS_IMETHODIMP
nsDOMCSSAttributeDeclaration::GetParentRule(nsIDOMCSSRule **aParent)
{
NS_ENSURE_ARG_POINTER(aParent);
*aParent = nullptr;
return NS_OK;
}
/* virtual */ nsINode*
nsDOMCSSAttributeDeclaration::GetParentObject()
{
return mElement;
}
NS_IMETHODIMP
nsDOMCSSAttributeDeclaration::SetPropertyValue(const nsCSSPropertyID aPropID,
const nsAString& aValue)
{
// Scripted modifications to style.opacity or style.transform
// could immediately force us into the animated state if heuristics suggest
// this is scripted animation.
// FIXME: This is missing the margin shorthand and the logical versions of
// the margin properties, see bug 1266287.
if (aPropID == eCSSProperty_opacity || aPropID == eCSSProperty_transform ||
aPropID == eCSSProperty_left || aPropID == eCSSProperty_top ||
aPropID == eCSSProperty_right || aPropID == eCSSProperty_bottom ||
aPropID == eCSSProperty_margin_left || aPropID == eCSSProperty_margin_top ||
aPropID == eCSSProperty_margin_right || aPropID == eCSSProperty_margin_bottom ||
aPropID == eCSSProperty_background_position_x ||
aPropID == eCSSProperty_background_position_y ||
aPropID == eCSSProperty_background_position) {
nsIFrame* frame = mElement->GetPrimaryFrame();
if (frame) {
ActiveLayerTracker::NotifyInlineStyleRuleModified(frame, aPropID, aValue, this);
}
}
return nsDOMCSSDeclaration::SetPropertyValue(aPropID, aValue);
}
|
