1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/style/nsDOMCSSAttrDeclaration.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,192 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +/* DOM object for element.style */
1.10 +
1.11 +#include "nsDOMCSSAttrDeclaration.h"
1.12 +
1.13 +#include "mozilla/css/Declaration.h"
1.14 +#include "mozilla/css/StyleRule.h"
1.15 +#include "mozilla/dom/Element.h"
1.16 +#include "nsIDocument.h"
1.17 +#include "nsIDOMMutationEvent.h"
1.18 +#include "nsIURI.h"
1.19 +#include "nsNodeUtils.h"
1.20 +#include "nsWrapperCacheInlines.h"
1.21 +#include "nsIFrame.h"
1.22 +#include "ActiveLayerTracker.h"
1.23 +
1.24 +using namespace mozilla;
1.25 +
1.26 +nsDOMCSSAttributeDeclaration::nsDOMCSSAttributeDeclaration(dom::Element* aElement,
1.27 + bool aIsSMILOverride)
1.28 + : mElement(aElement)
1.29 + , mIsSMILOverride(aIsSMILOverride)
1.30 +{
1.31 + MOZ_COUNT_CTOR(nsDOMCSSAttributeDeclaration);
1.32 +
1.33 + NS_ASSERTION(aElement, "Inline style for a NULL element?");
1.34 +}
1.35 +
1.36 +nsDOMCSSAttributeDeclaration::~nsDOMCSSAttributeDeclaration()
1.37 +{
1.38 + MOZ_COUNT_DTOR(nsDOMCSSAttributeDeclaration);
1.39 +}
1.40 +
1.41 +NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_1(nsDOMCSSAttributeDeclaration, mElement)
1.42 +
1.43 +// mElement holds a strong ref to us, so if it's going to be
1.44 +// skipped, the attribute declaration can't be part of a garbage
1.45 +// cycle.
1.46 +NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_BEGIN(nsDOMCSSAttributeDeclaration)
1.47 + if (tmp->mElement && Element::CanSkip(tmp->mElement, true)) {
1.48 + if (tmp->PreservingWrapper()) {
1.49 + // This marks the wrapper black.
1.50 + tmp->GetWrapper();
1.51 + }
1.52 + return true;
1.53 + }
1.54 + return tmp->IsBlack();
1.55 +NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_END
1.56 +
1.57 +NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_BEGIN(nsDOMCSSAttributeDeclaration)
1.58 + return tmp->IsBlack() ||
1.59 + (tmp->mElement && Element::CanSkipInCC(tmp->mElement));
1.60 +NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_END
1.61 +
1.62 +NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_BEGIN(nsDOMCSSAttributeDeclaration)
1.63 + return tmp->IsBlack() ||
1.64 + (tmp->mElement && Element::CanSkipThis(tmp->mElement));
1.65 +NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_END
1.66 +
1.67 +NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsDOMCSSAttributeDeclaration)
1.68 + NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
1.69 +NS_IMPL_QUERY_TAIL_INHERITING(nsDOMCSSDeclaration)
1.70 +
1.71 +NS_IMPL_CYCLE_COLLECTING_ADDREF(nsDOMCSSAttributeDeclaration)
1.72 +NS_IMPL_CYCLE_COLLECTING_RELEASE(nsDOMCSSAttributeDeclaration)
1.73 +
1.74 +nsresult
1.75 +nsDOMCSSAttributeDeclaration::SetCSSDeclaration(css::Declaration* aDecl)
1.76 +{
1.77 + NS_ASSERTION(mElement, "Must have Element to set the declaration!");
1.78 + css::StyleRule* oldRule =
1.79 + mIsSMILOverride ? mElement->GetSMILOverrideStyleRule() :
1.80 + mElement->GetInlineStyleRule();
1.81 + NS_ASSERTION(oldRule, "Element must have rule");
1.82 +
1.83 + nsRefPtr<css::StyleRule> newRule =
1.84 + oldRule->DeclarationChanged(aDecl, false);
1.85 + if (!newRule) {
1.86 + return NS_ERROR_OUT_OF_MEMORY;
1.87 + }
1.88 +
1.89 + return
1.90 + mIsSMILOverride ? mElement->SetSMILOverrideStyleRule(newRule, true) :
1.91 + mElement->SetInlineStyleRule(newRule, nullptr, true);
1.92 +}
1.93 +
1.94 +nsIDocument*
1.95 +nsDOMCSSAttributeDeclaration::DocToUpdate()
1.96 +{
1.97 + // XXXbz this is a bit of a hack, especially doing it before the
1.98 + // BeginUpdate(), but this is a good chokepoint where we know we
1.99 + // plan to modify the CSSDeclaration, so need to notify
1.100 + // AttributeWillChange if this is inline style.
1.101 + if (!mIsSMILOverride) {
1.102 + nsNodeUtils::AttributeWillChange(mElement, kNameSpaceID_None,
1.103 + nsGkAtoms::style,
1.104 + nsIDOMMutationEvent::MODIFICATION);
1.105 + }
1.106 +
1.107 + // We need OwnerDoc() rather than GetCurrentDoc() because it might
1.108 + // be the BeginUpdate call that inserts mElement into the document.
1.109 + return mElement->OwnerDoc();
1.110 +}
1.111 +
1.112 +css::Declaration*
1.113 +nsDOMCSSAttributeDeclaration::GetCSSDeclaration(bool aAllocate)
1.114 +{
1.115 + if (!mElement)
1.116 + return nullptr;
1.117 +
1.118 + css::StyleRule* cssRule;
1.119 + if (mIsSMILOverride)
1.120 + cssRule = mElement->GetSMILOverrideStyleRule();
1.121 + else
1.122 + cssRule = mElement->GetInlineStyleRule();
1.123 +
1.124 + if (cssRule) {
1.125 + return cssRule->GetDeclaration();
1.126 + }
1.127 + if (!aAllocate) {
1.128 + return nullptr;
1.129 + }
1.130 +
1.131 + // cannot fail
1.132 + css::Declaration *decl = new css::Declaration();
1.133 + decl->InitializeEmpty();
1.134 + nsRefPtr<css::StyleRule> newRule = new css::StyleRule(nullptr, decl);
1.135 +
1.136 + // this *can* fail (inside SetAttrAndNotify, at least).
1.137 + nsresult rv;
1.138 + if (mIsSMILOverride)
1.139 + rv = mElement->SetSMILOverrideStyleRule(newRule, false);
1.140 + else
1.141 + rv = mElement->SetInlineStyleRule(newRule, nullptr, false);
1.142 +
1.143 + if (NS_FAILED(rv)) {
1.144 + return nullptr; // the decl will be destroyed along with the style rule
1.145 + }
1.146 +
1.147 + return decl;
1.148 +}
1.149 +
1.150 +void
1.151 +nsDOMCSSAttributeDeclaration::GetCSSParsingEnvironment(CSSParsingEnvironment& aCSSParseEnv)
1.152 +{
1.153 + NS_ASSERTION(mElement, "Something is severely broken -- there should be an Element here!");
1.154 +
1.155 + nsIDocument* doc = mElement->OwnerDoc();
1.156 + aCSSParseEnv.mSheetURI = doc->GetDocumentURI();
1.157 + aCSSParseEnv.mBaseURI = mElement->GetBaseURI();
1.158 + aCSSParseEnv.mPrincipal = mElement->NodePrincipal();
1.159 + aCSSParseEnv.mCSSLoader = doc->CSSLoader();
1.160 +}
1.161 +
1.162 +NS_IMETHODIMP
1.163 +nsDOMCSSAttributeDeclaration::GetParentRule(nsIDOMCSSRule **aParent)
1.164 +{
1.165 + NS_ENSURE_ARG_POINTER(aParent);
1.166 +
1.167 + *aParent = nullptr;
1.168 + return NS_OK;
1.169 +}
1.170 +
1.171 +/* virtual */ nsINode*
1.172 +nsDOMCSSAttributeDeclaration::GetParentObject()
1.173 +{
1.174 + return mElement;
1.175 +}
1.176 +
1.177 +NS_IMETHODIMP
1.178 +nsDOMCSSAttributeDeclaration::SetPropertyValue(const nsCSSProperty aPropID,
1.179 + const nsAString& aValue)
1.180 +{
1.181 + // Scripted modifications to style.opacity or style.transform
1.182 + // could immediately force us into the animated state if heuristics suggest
1.183 + // this is scripted animation.
1.184 + if (aPropID == eCSSProperty_opacity || aPropID == eCSSProperty_transform ||
1.185 + aPropID == eCSSProperty_left || aPropID == eCSSProperty_top ||
1.186 + aPropID == eCSSProperty_right || aPropID == eCSSProperty_bottom ||
1.187 + aPropID == eCSSProperty_margin_left || aPropID == eCSSProperty_margin_top ||
1.188 + aPropID == eCSSProperty_margin_right || aPropID == eCSSProperty_margin_bottom) {
1.189 + nsIFrame* frame = mElement->GetPrimaryFrame();
1.190 + if (frame) {
1.191 + ActiveLayerTracker::NotifyInlineStyleRuleModified(frame, aPropID);
1.192 + }
1.193 + }
1.194 + return nsDOMCSSDeclaration::SetPropertyValue(aPropID, aValue);
1.195 +}
