layout/style/nsDOMCSSAttrDeclaration.cpp@97036ab72558 (annotated)
layout/style/nsDOMCSSAttrDeclaration.cpp
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | /* DOM object for element.style */ |
| michael@0 | 7 | |
| michael@0 | 8 | #include "nsDOMCSSAttrDeclaration.h" |
| michael@0 | 9 | |
| michael@0 | 10 | #include "mozilla/css/Declaration.h" |
| michael@0 | 11 | #include "mozilla/css/StyleRule.h" |
| michael@0 | 12 | #include "mozilla/dom/Element.h" |
| michael@0 | 13 | #include "nsIDocument.h" |
| michael@0 | 14 | #include "nsIDOMMutationEvent.h" |
| michael@0 | 15 | #include "nsIURI.h" |
| michael@0 | 16 | #include "nsNodeUtils.h" |
| michael@0 | 17 | #include "nsWrapperCacheInlines.h" |
| michael@0 | 18 | #include "nsIFrame.h" |
| michael@0 | 19 | #include "ActiveLayerTracker.h" |
| michael@0 | 20 | |
| michael@0 | 21 | using namespace mozilla; |
| michael@0 | 22 | |
| michael@0 | 23 | nsDOMCSSAttributeDeclaration::nsDOMCSSAttributeDeclaration(dom::Element* aElement, |
| michael@0 | 24 | bool aIsSMILOverride) |
| michael@0 | 25 | : mElement(aElement) |
| michael@0 | 26 | , mIsSMILOverride(aIsSMILOverride) |
| michael@0 | 27 | { |
| michael@0 | 28 | MOZ_COUNT_CTOR(nsDOMCSSAttributeDeclaration); |
| michael@0 | 29 | |
| michael@0 | 30 | NS_ASSERTION(aElement, "Inline style for a NULL element?"); |
| michael@0 | 31 | } |
| michael@0 | 32 | |
| michael@0 | 33 | nsDOMCSSAttributeDeclaration::~nsDOMCSSAttributeDeclaration() |
| michael@0 | 34 | { |
| michael@0 | 35 | MOZ_COUNT_DTOR(nsDOMCSSAttributeDeclaration); |
| michael@0 | 36 | } |
| michael@0 | 37 | |
| michael@0 | 38 | NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_1(nsDOMCSSAttributeDeclaration, mElement) |
| michael@0 | 39 | |
| michael@0 | 40 | // mElement holds a strong ref to us, so if it's going to be |
| michael@0 | 41 | // skipped, the attribute declaration can't be part of a garbage |
| michael@0 | 42 | // cycle. |
| michael@0 | 43 | NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_BEGIN(nsDOMCSSAttributeDeclaration) |
| michael@0 | 44 | if (tmp->mElement && Element::CanSkip(tmp->mElement, true)) { |
| michael@0 | 45 | if (tmp->PreservingWrapper()) { |
| michael@0 | 46 | // This marks the wrapper black. |
| michael@0 | 47 | tmp->GetWrapper(); |
| michael@0 | 48 | } |
| michael@0 | 49 | return true; |
| michael@0 | 50 | } |
| michael@0 | 51 | return tmp->IsBlack(); |
| michael@0 | 52 | NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_END |
| michael@0 | 53 | |
| michael@0 | 54 | NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_BEGIN(nsDOMCSSAttributeDeclaration) |
| michael@0 | 55 | return tmp->IsBlack() || |
| michael@0 | 56 | (tmp->mElement && Element::CanSkipInCC(tmp->mElement)); |
| michael@0 | 57 | NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_END |
| michael@0 | 58 | |
| michael@0 | 59 | NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_BEGIN(nsDOMCSSAttributeDeclaration) |
| michael@0 | 60 | return tmp->IsBlack() || |
| michael@0 | 61 | (tmp->mElement && Element::CanSkipThis(tmp->mElement)); |
| michael@0 | 62 | NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_END |
| michael@0 | 63 | |
| michael@0 | 64 | NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsDOMCSSAttributeDeclaration) |
| michael@0 | 65 | NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY |
| michael@0 | 66 | NS_IMPL_QUERY_TAIL_INHERITING(nsDOMCSSDeclaration) |
| michael@0 | 67 | |
| michael@0 | 68 | NS_IMPL_CYCLE_COLLECTING_ADDREF(nsDOMCSSAttributeDeclaration) |
| michael@0 | 69 | NS_IMPL_CYCLE_COLLECTING_RELEASE(nsDOMCSSAttributeDeclaration) |
| michael@0 | 70 | |
| michael@0 | 71 | nsresult |
| michael@0 | 72 | nsDOMCSSAttributeDeclaration::SetCSSDeclaration(css::Declaration* aDecl) |
| michael@0 | 73 | { |
| michael@0 | 74 | NS_ASSERTION(mElement, "Must have Element to set the declaration!"); |
| michael@0 | 75 | css::StyleRule* oldRule = |
| michael@0 | 76 | mIsSMILOverride ? mElement->GetSMILOverrideStyleRule() : |
| michael@0 | 77 | mElement->GetInlineStyleRule(); |
| michael@0 | 78 | NS_ASSERTION(oldRule, "Element must have rule"); |
| michael@0 | 79 | |
| michael@0 | 80 | nsRefPtr<css::StyleRule> newRule = |
| michael@0 | 81 | oldRule->DeclarationChanged(aDecl, false); |
| michael@0 | 82 | if (!newRule) { |
| michael@0 | 83 | return NS_ERROR_OUT_OF_MEMORY; |
| michael@0 | 84 | } |
| michael@0 | 85 | |
| michael@0 | 86 | return |
| michael@0 | 87 | mIsSMILOverride ? mElement->SetSMILOverrideStyleRule(newRule, true) : |
| michael@0 | 88 | mElement->SetInlineStyleRule(newRule, nullptr, true); |
| michael@0 | 89 | } |
| michael@0 | 90 | |
| michael@0 | 91 | nsIDocument* |
| michael@0 | 92 | nsDOMCSSAttributeDeclaration::DocToUpdate() |
| michael@0 | 93 | { |
| michael@0 | 94 | // XXXbz this is a bit of a hack, especially doing it before the |
| michael@0 | 95 | // BeginUpdate(), but this is a good chokepoint where we know we |
| michael@0 | 96 | // plan to modify the CSSDeclaration, so need to notify |
| michael@0 | 97 | // AttributeWillChange if this is inline style. |
| michael@0 | 98 | if (!mIsSMILOverride) { |
| michael@0 | 99 | nsNodeUtils::AttributeWillChange(mElement, kNameSpaceID_None, |
| michael@0 | 100 | nsGkAtoms::style, |
| michael@0 | 101 | nsIDOMMutationEvent::MODIFICATION); |
| michael@0 | 102 | } |
| michael@0 | 103 | |
| michael@0 | 104 | // We need OwnerDoc() rather than GetCurrentDoc() because it might |
| michael@0 | 105 | // be the BeginUpdate call that inserts mElement into the document. |
| michael@0 | 106 | return mElement->OwnerDoc(); |
| michael@0 | 107 | } |
| michael@0 | 108 | |
| michael@0 | 109 | css::Declaration* |
| michael@0 | 110 | nsDOMCSSAttributeDeclaration::GetCSSDeclaration(bool aAllocate) |
| michael@0 | 111 | { |
| michael@0 | 112 | if (!mElement) |
| michael@0 | 113 | return nullptr; |
| michael@0 | 114 | |
| michael@0 | 115 | css::StyleRule* cssRule; |
| michael@0 | 116 | if (mIsSMILOverride) |
| michael@0 | 117 | cssRule = mElement->GetSMILOverrideStyleRule(); |
| michael@0 | 118 | else |
| michael@0 | 119 | cssRule = mElement->GetInlineStyleRule(); |
| michael@0 | 120 | |
| michael@0 | 121 | if (cssRule) { |
| michael@0 | 122 | return cssRule->GetDeclaration(); |
| michael@0 | 123 | } |
| michael@0 | 124 | if (!aAllocate) { |
| michael@0 | 125 | return nullptr; |
| michael@0 | 126 | } |
| michael@0 | 127 | |
| michael@0 | 128 | // cannot fail |
| michael@0 | 129 | css::Declaration *decl = new css::Declaration(); |
| michael@0 | 130 | decl->InitializeEmpty(); |
| michael@0 | 131 | nsRefPtr<css::StyleRule> newRule = new css::StyleRule(nullptr, decl); |
| michael@0 | 132 | |
| michael@0 | 133 | // this *can* fail (inside SetAttrAndNotify, at least). |
| michael@0 | 134 | nsresult rv; |
| michael@0 | 135 | if (mIsSMILOverride) |
| michael@0 | 136 | rv = mElement->SetSMILOverrideStyleRule(newRule, false); |
| michael@0 | 137 | else |
| michael@0 | 138 | rv = mElement->SetInlineStyleRule(newRule, nullptr, false); |
| michael@0 | 139 | |
| michael@0 | 140 | if (NS_FAILED(rv)) { |
| michael@0 | 141 | return nullptr; // the decl will be destroyed along with the style rule |
| michael@0 | 142 | } |
| michael@0 | 143 | |
| michael@0 | 144 | return decl; |
| michael@0 | 145 | } |
| michael@0 | 146 | |
| michael@0 | 147 | void |
| michael@0 | 148 | nsDOMCSSAttributeDeclaration::GetCSSParsingEnvironment(CSSParsingEnvironment& aCSSParseEnv) |
| michael@0 | 149 | { |
| michael@0 | 150 | NS_ASSERTION(mElement, "Something is severely broken -- there should be an Element here!"); |
| michael@0 | 151 | |
| michael@0 | 152 | nsIDocument* doc = mElement->OwnerDoc(); |
| michael@0 | 153 | aCSSParseEnv.mSheetURI = doc->GetDocumentURI(); |
| michael@0 | 154 | aCSSParseEnv.mBaseURI = mElement->GetBaseURI(); |
| michael@0 | 155 | aCSSParseEnv.mPrincipal = mElement->NodePrincipal(); |
| michael@0 | 156 | aCSSParseEnv.mCSSLoader = doc->CSSLoader(); |
| michael@0 | 157 | } |
| michael@0 | 158 | |
| michael@0 | 159 | NS_IMETHODIMP |
| michael@0 | 160 | nsDOMCSSAttributeDeclaration::GetParentRule(nsIDOMCSSRule **aParent) |
| michael@0 | 161 | { |
| michael@0 | 162 | NS_ENSURE_ARG_POINTER(aParent); |
| michael@0 | 163 | |
| michael@0 | 164 | *aParent = nullptr; |
| michael@0 | 165 | return NS_OK; |
| michael@0 | 166 | } |
| michael@0 | 167 | |
| michael@0 | 168 | /* virtual */ nsINode* |
| michael@0 | 169 | nsDOMCSSAttributeDeclaration::GetParentObject() |
| michael@0 | 170 | { |
| michael@0 | 171 | return mElement; |
| michael@0 | 172 | } |
| michael@0 | 173 | |
| michael@0 | 174 | NS_IMETHODIMP |
| michael@0 | 175 | nsDOMCSSAttributeDeclaration::SetPropertyValue(const nsCSSProperty aPropID, |
| michael@0 | 176 | const nsAString& aValue) |
| michael@0 | 177 | { |
| michael@0 | 178 | // Scripted modifications to style.opacity or style.transform |
| michael@0 | 179 | // could immediately force us into the animated state if heuristics suggest |
| michael@0 | 180 | // this is scripted animation. |
| michael@0 | 181 | if (aPropID == eCSSProperty_opacity || aPropID == eCSSProperty_transform || |
| michael@0 | 182 | aPropID == eCSSProperty_left || aPropID == eCSSProperty_top || |
| michael@0 | 183 | aPropID == eCSSProperty_right || aPropID == eCSSProperty_bottom || |
| michael@0 | 184 | aPropID == eCSSProperty_margin_left || aPropID == eCSSProperty_margin_top || |
| michael@0 | 185 | aPropID == eCSSProperty_margin_right || aPropID == eCSSProperty_margin_bottom) { |
| michael@0 | 186 | nsIFrame* frame = mElement->GetPrimaryFrame(); |
| michael@0 | 187 | if (frame) { |
| michael@0 | 188 | ActiveLayerTracker::NotifyInlineStyleRuleModified(frame, aPropID); |
| michael@0 | 189 | } |
| michael@0 | 190 | } |
| michael@0 | 191 | return nsDOMCSSDeclaration::SetPropertyValue(aPropID, aValue); |
| michael@0 | 192 | } |
