michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /* DOM object for element.style */
michael@0: 
michael@0: #include "nsDOMCSSAttrDeclaration.h"
michael@0: 
michael@0: #include "mozilla/css/Declaration.h"
michael@0: #include "mozilla/css/StyleRule.h"
michael@0: #include "mozilla/dom/Element.h"
michael@0: #include "nsIDocument.h"
michael@0: #include "nsIDOMMutationEvent.h"
michael@0: #include "nsIURI.h"
michael@0: #include "nsNodeUtils.h"
michael@0: #include "nsWrapperCacheInlines.h"
michael@0: #include "nsIFrame.h"
michael@0: #include "ActiveLayerTracker.h"
michael@0: 
michael@0: using namespace mozilla;
michael@0: 
michael@0: nsDOMCSSAttributeDeclaration::nsDOMCSSAttributeDeclaration(dom::Element* aElement,
michael@0:                                                            bool aIsSMILOverride)
michael@0:   : mElement(aElement)
michael@0:   , mIsSMILOverride(aIsSMILOverride)
michael@0: {
michael@0:   MOZ_COUNT_CTOR(nsDOMCSSAttributeDeclaration);
michael@0: 
michael@0:   NS_ASSERTION(aElement, "Inline style for a NULL element?");
michael@0: }
michael@0: 
michael@0: nsDOMCSSAttributeDeclaration::~nsDOMCSSAttributeDeclaration()
michael@0: {
michael@0:   MOZ_COUNT_DTOR(nsDOMCSSAttributeDeclaration);
michael@0: }
michael@0: 
michael@0: NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_1(nsDOMCSSAttributeDeclaration, mElement)
michael@0: 
michael@0: // mElement holds a strong ref to us, so if it's going to be
michael@0: // skipped, the attribute declaration can't be part of a garbage
michael@0: // cycle.
michael@0: NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_BEGIN(nsDOMCSSAttributeDeclaration)
michael@0:   if (tmp->mElement && Element::CanSkip(tmp->mElement, true)) {
michael@0:     if (tmp->PreservingWrapper()) {
michael@0:       // This marks the wrapper black.
michael@0:       tmp->GetWrapper();
michael@0:     }
michael@0:     return true;
michael@0:   }
michael@0:   return tmp->IsBlack();
michael@0: NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_END
michael@0: 
michael@0: NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_BEGIN(nsDOMCSSAttributeDeclaration)
michael@0:   return tmp->IsBlack() ||
michael@0:     (tmp->mElement && Element::CanSkipInCC(tmp->mElement));
michael@0: NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_IN_CC_END
michael@0: 
michael@0: NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_BEGIN(nsDOMCSSAttributeDeclaration)
michael@0:   return tmp->IsBlack() ||
michael@0:     (tmp->mElement && Element::CanSkipThis(tmp->mElement));
michael@0: NS_IMPL_CYCLE_COLLECTION_CAN_SKIP_THIS_END
michael@0: 
michael@0: NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsDOMCSSAttributeDeclaration)
michael@0:   NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
michael@0: NS_IMPL_QUERY_TAIL_INHERITING(nsDOMCSSDeclaration)
michael@0: 
michael@0: NS_IMPL_CYCLE_COLLECTING_ADDREF(nsDOMCSSAttributeDeclaration)
michael@0: NS_IMPL_CYCLE_COLLECTING_RELEASE(nsDOMCSSAttributeDeclaration)
michael@0: 
michael@0: nsresult
michael@0: nsDOMCSSAttributeDeclaration::SetCSSDeclaration(css::Declaration* aDecl)
michael@0: {
michael@0:   NS_ASSERTION(mElement, "Must have Element to set the declaration!");
michael@0:   css::StyleRule* oldRule =
michael@0:     mIsSMILOverride ? mElement->GetSMILOverrideStyleRule() :
michael@0:     mElement->GetInlineStyleRule();
michael@0:   NS_ASSERTION(oldRule, "Element must have rule");
michael@0: 
michael@0:   nsRefPtr<css::StyleRule> newRule =
michael@0:     oldRule->DeclarationChanged(aDecl, false);
michael@0:   if (!newRule) {
michael@0:     return NS_ERROR_OUT_OF_MEMORY;
michael@0:   }
michael@0: 
michael@0:   return
michael@0:     mIsSMILOverride ? mElement->SetSMILOverrideStyleRule(newRule, true) :
michael@0:     mElement->SetInlineStyleRule(newRule, nullptr, true);
michael@0: }
michael@0: 
michael@0: nsIDocument*
michael@0: nsDOMCSSAttributeDeclaration::DocToUpdate()
michael@0: {
michael@0:   // XXXbz this is a bit of a hack, especially doing it before the
michael@0:   // BeginUpdate(), but this is a good chokepoint where we know we
michael@0:   // plan to modify the CSSDeclaration, so need to notify
michael@0:   // AttributeWillChange if this is inline style.
michael@0:   if (!mIsSMILOverride) {
michael@0:     nsNodeUtils::AttributeWillChange(mElement, kNameSpaceID_None,
michael@0:                                      nsGkAtoms::style,
michael@0:                                      nsIDOMMutationEvent::MODIFICATION);
michael@0:   }
michael@0:  
michael@0:   // We need OwnerDoc() rather than GetCurrentDoc() because it might
michael@0:   // be the BeginUpdate call that inserts mElement into the document.
michael@0:   return mElement->OwnerDoc();
michael@0: }
michael@0: 
michael@0: css::Declaration*
michael@0: nsDOMCSSAttributeDeclaration::GetCSSDeclaration(bool aAllocate)
michael@0: {
michael@0:   if (!mElement)
michael@0:     return nullptr;
michael@0: 
michael@0:   css::StyleRule* cssRule;
michael@0:   if (mIsSMILOverride)
michael@0:     cssRule = mElement->GetSMILOverrideStyleRule();
michael@0:   else
michael@0:     cssRule = mElement->GetInlineStyleRule();
michael@0: 
michael@0:   if (cssRule) {
michael@0:     return cssRule->GetDeclaration();
michael@0:   }
michael@0:   if (!aAllocate) {
michael@0:     return nullptr;
michael@0:   }
michael@0: 
michael@0:   // cannot fail
michael@0:   css::Declaration *decl = new css::Declaration();
michael@0:   decl->InitializeEmpty();
michael@0:   nsRefPtr<css::StyleRule> newRule = new css::StyleRule(nullptr, decl);
michael@0: 
michael@0:   // this *can* fail (inside SetAttrAndNotify, at least).
michael@0:   nsresult rv;
michael@0:   if (mIsSMILOverride)
michael@0:     rv = mElement->SetSMILOverrideStyleRule(newRule, false);
michael@0:   else
michael@0:     rv = mElement->SetInlineStyleRule(newRule, nullptr, false);
michael@0: 
michael@0:   if (NS_FAILED(rv)) {
michael@0:     return nullptr; // the decl will be destroyed along with the style rule
michael@0:   }
michael@0: 
michael@0:   return decl;
michael@0: }
michael@0: 
michael@0: void
michael@0: nsDOMCSSAttributeDeclaration::GetCSSParsingEnvironment(CSSParsingEnvironment& aCSSParseEnv)
michael@0: {
michael@0:   NS_ASSERTION(mElement, "Something is severely broken -- there should be an Element here!");
michael@0: 
michael@0:   nsIDocument* doc = mElement->OwnerDoc();
michael@0:   aCSSParseEnv.mSheetURI = doc->GetDocumentURI();
michael@0:   aCSSParseEnv.mBaseURI = mElement->GetBaseURI();
michael@0:   aCSSParseEnv.mPrincipal = mElement->NodePrincipal();
michael@0:   aCSSParseEnv.mCSSLoader = doc->CSSLoader();
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: nsDOMCSSAttributeDeclaration::GetParentRule(nsIDOMCSSRule **aParent)
michael@0: {
michael@0:   NS_ENSURE_ARG_POINTER(aParent);
michael@0: 
michael@0:   *aParent = nullptr;
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: /* virtual */ nsINode*
michael@0: nsDOMCSSAttributeDeclaration::GetParentObject()
michael@0: {
michael@0:   return mElement;
michael@0: }
michael@0: 
michael@0: NS_IMETHODIMP
michael@0: nsDOMCSSAttributeDeclaration::SetPropertyValue(const nsCSSProperty aPropID,
michael@0:                                                const nsAString& aValue)
michael@0: {
michael@0:   // Scripted modifications to style.opacity or style.transform
michael@0:   // could immediately force us into the animated state if heuristics suggest
michael@0:   // this is scripted animation.
michael@0:   if (aPropID == eCSSProperty_opacity || aPropID == eCSSProperty_transform ||
michael@0:       aPropID == eCSSProperty_left || aPropID == eCSSProperty_top ||
michael@0:       aPropID == eCSSProperty_right || aPropID == eCSSProperty_bottom ||
michael@0:       aPropID == eCSSProperty_margin_left || aPropID == eCSSProperty_margin_top ||
michael@0:       aPropID == eCSSProperty_margin_right || aPropID == eCSSProperty_margin_bottom) {
michael@0:     nsIFrame* frame = mElement->GetPrimaryFrame();
michael@0:     if (frame) {
michael@0:       ActiveLayerTracker::NotifyInlineStyleRuleModified(frame, aPropID);
michael@0:     }
michael@0:   }
michael@0:   return nsDOMCSSDeclaration::SetPropertyValue(aPropID, aValue);
michael@0: }