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/* -*- 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 "mozilla/dom/DocGroup.h"
#include "nsIDocument.h"
#include "nsIDOMMutationEvent.h"
#include "nsIURI.h"
#include "nsNodeUtils.h"
#include "nsWrapperCacheInlines.h"
#include "nsIFrame.h"
#include "ActiveLayerTracker.h"
#include "ServoDeclarationBlock.h"
#include "StyleSetHandle.h"
#include "DeclarationBlockInlines.h"
using namespace mozilla;
using namespace mozilla::dom;
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;
}
/* virtual */ DocGroup*
nsDOMCSSAttributeDeclaration::GetDocGroup() const
{
return mElement ? mElement->OwnerDoc()->GetDocGroup() : nullptr;
}
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);
}
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