diff options
Diffstat (limited to 'dom/svg/SVGMPathElement.cpp')
| -rw-r--r-- | dom/svg/SVGMPathElement.cpp | 288 |
1 files changed, 288 insertions, 0 deletions
diff --git a/dom/svg/SVGMPathElement.cpp b/dom/svg/SVGMPathElement.cpp new file mode 100644 index 000000000..4a137f8fc --- /dev/null +++ b/dom/svg/SVGMPathElement.cpp @@ -0,0 +1,288 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* 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/. */ + +#include "mozilla/ArrayUtils.h" + +#include "mozilla/dom/SVGMPathElement.h" +#include "nsDebug.h" +#include "mozilla/dom/SVGAnimateMotionElement.h" +#include "mozilla/dom/SVGPathElement.h" +#include "nsContentUtils.h" +#include "mozilla/dom/SVGMPathElementBinding.h" +#include "nsIURI.h" + +NS_IMPL_NS_NEW_NAMESPACED_SVG_ELEMENT(MPath) + +namespace mozilla { +namespace dom { + +JSObject* +SVGMPathElement::WrapNode(JSContext *aCx, JS::Handle<JSObject*> aGivenProto) +{ + return SVGMPathElementBinding::Wrap(aCx, this, aGivenProto); +} + +nsSVGElement::StringInfo SVGMPathElement::sStringInfo[2] = +{ + { &nsGkAtoms::href, kNameSpaceID_None, false }, + { &nsGkAtoms::href, kNameSpaceID_XLink, false } +}; + +// Cycle collection magic -- based on SVGUseElement +NS_IMPL_CYCLE_COLLECTION_CLASS(SVGMPathElement) + +NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(SVGMPathElement, + SVGMPathElementBase) + tmp->UnlinkHrefTarget(false); +NS_IMPL_CYCLE_COLLECTION_UNLINK_END + +NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(SVGMPathElement, + SVGMPathElementBase) + tmp->mHrefTarget.Traverse(&cb); +NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END + +//---------------------------------------------------------------------- +// nsISupports methods + +NS_IMPL_ADDREF_INHERITED(SVGMPathElement,SVGMPathElementBase) +NS_IMPL_RELEASE_INHERITED(SVGMPathElement,SVGMPathElementBase) + +NS_INTERFACE_TABLE_HEAD_CYCLE_COLLECTION_INHERITED(SVGMPathElement) + NS_INTERFACE_TABLE_INHERITED(SVGMPathElement, nsIDOMNode, nsIDOMElement, + nsIDOMSVGElement, + nsIMutationObserver) +NS_INTERFACE_TABLE_TAIL_INHERITING(SVGMPathElementBase) + +// Constructor +SVGMPathElement::SVGMPathElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo) + : SVGMPathElementBase(aNodeInfo), + mHrefTarget(this) +{ +} + +SVGMPathElement::~SVGMPathElement() +{ + UnlinkHrefTarget(false); +} + +//---------------------------------------------------------------------- +// nsIDOMNode methods + +NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGMPathElement) + +already_AddRefed<SVGAnimatedString> +SVGMPathElement::Href() +{ + return mStringAttributes[HREF].IsExplicitlySet() + ? mStringAttributes[HREF].ToDOMAnimatedString(this) + : mStringAttributes[XLINK_HREF].ToDOMAnimatedString(this); +} + +//---------------------------------------------------------------------- +// nsIContent methods + +nsresult +SVGMPathElement::BindToTree(nsIDocument* aDocument, + nsIContent* aParent, + nsIContent* aBindingParent, + bool aCompileEventHandlers) +{ + MOZ_ASSERT(!mHrefTarget.get(), + "Shouldn't have href-target yet (or it should've been cleared)"); + nsresult rv = SVGMPathElementBase::BindToTree(aDocument, aParent, + aBindingParent, + aCompileEventHandlers); + NS_ENSURE_SUCCESS(rv,rv); + + if (aDocument) { + const nsAttrValue* hrefAttrValue = + HasAttr(kNameSpaceID_None, nsGkAtoms::href) + ? mAttrsAndChildren.GetAttr(nsGkAtoms::href, kNameSpaceID_None) + : mAttrsAndChildren.GetAttr(nsGkAtoms::href, kNameSpaceID_XLink); + if (hrefAttrValue) { + UpdateHrefTarget(aParent, hrefAttrValue->GetStringValue()); + } + } + + return NS_OK; +} + +void +SVGMPathElement::UnbindFromTree(bool aDeep, bool aNullParent) +{ + UnlinkHrefTarget(true); + SVGMPathElementBase::UnbindFromTree(aDeep, aNullParent); +} + +bool +SVGMPathElement::ParseAttribute(int32_t aNamespaceID, + nsIAtom* aAttribute, + const nsAString& aValue, + nsAttrValue& aResult) +{ + bool returnVal = + SVGMPathElementBase::ParseAttribute(aNamespaceID, aAttribute, + aValue, aResult); + if ((aNamespaceID == kNameSpaceID_XLink || + aNamespaceID == kNameSpaceID_None ) && + aAttribute == nsGkAtoms::href && + IsInUncomposedDoc()) { + // Note: If we fail the IsInDoc call, it's ok -- we'll update the target + // on next BindToTree call. + + // Note: "href" takes priority over xlink:href. So if "xlink:href" is being + // set here, we only let that update our target if "href" is *unset*. + if (aNamespaceID != kNameSpaceID_XLink || + !mStringAttributes[HREF].IsExplicitlySet()) { + UpdateHrefTarget(GetParent(), aValue); + } + } + return returnVal; +} + +nsresult +SVGMPathElement::UnsetAttr(int32_t aNamespaceID, + nsIAtom* aAttribute, bool aNotify) +{ + nsresult rv = SVGMPathElementBase::UnsetAttr(aNamespaceID, aAttribute, + aNotify); + NS_ENSURE_SUCCESS(rv, rv); + + if (aAttribute == nsGkAtoms::href) { + if (aNamespaceID == kNameSpaceID_None) { + UnlinkHrefTarget(true); + + // After unsetting href, we may still have xlink:href, so we should + // try to add it back. + const nsAttrValue* xlinkHref = + mAttrsAndChildren.GetAttr(nsGkAtoms::href, kNameSpaceID_XLink); + if (xlinkHref) { + UpdateHrefTarget(GetParent(), xlinkHref->GetStringValue()); + } + } else if (!HasAttr(kNameSpaceID_None, nsGkAtoms::href)) { + UnlinkHrefTarget(true); + } // else: we unset xlink:href, but we still have href attribute, so keep + // the target linking to href. + } + + return NS_OK; +} + +//---------------------------------------------------------------------- +// nsSVGElement methods + +nsSVGElement::StringAttributesInfo +SVGMPathElement::GetStringInfo() +{ + return StringAttributesInfo(mStringAttributes, sStringInfo, + ArrayLength(sStringInfo)); +} + +//---------------------------------------------------------------------- +// nsIMutationObserver methods + +void +SVGMPathElement::AttributeChanged(nsIDocument* aDocument, + Element* aElement, + int32_t aNameSpaceID, + nsIAtom* aAttribute, + int32_t aModType, + const nsAttrValue* aOldValue) +{ + if (aNameSpaceID == kNameSpaceID_None) { + if (aAttribute == nsGkAtoms::d) { + NotifyParentOfMpathChange(GetParent()); + } + } +} + +//---------------------------------------------------------------------- +// Public helper methods + +SVGPathElement* +SVGMPathElement::GetReferencedPath() +{ + if (!HasAttr(kNameSpaceID_XLink, nsGkAtoms::href) && + !HasAttr(kNameSpaceID_None, nsGkAtoms::href)) { + MOZ_ASSERT(!mHrefTarget.get(), + "We shouldn't have a href target " + "if we don't have an xlink:href or href attribute"); + return nullptr; + } + + nsIContent* genericTarget = mHrefTarget.get(); + if (genericTarget && genericTarget->IsSVGElement(nsGkAtoms::path)) { + return static_cast<SVGPathElement*>(genericTarget); + } + return nullptr; +} + +//---------------------------------------------------------------------- +// Protected helper methods + +void +SVGMPathElement::UpdateHrefTarget(nsIContent* aParent, + const nsAString& aHrefStr) +{ + nsCOMPtr<nsIURI> targetURI; + nsCOMPtr<nsIURI> baseURI = GetBaseURI(); + nsContentUtils::NewURIWithDocumentCharset(getter_AddRefs(targetURI), + aHrefStr, OwnerDoc(), baseURI); + + // Stop observing old target (if any) + if (mHrefTarget.get()) { + mHrefTarget.get()->RemoveMutationObserver(this); + } + + if (aParent) { + // Pass in |aParent| instead of |this| -- first argument is only used + // for a call to GetComposedDoc(), and |this| might not have a current + // document yet (if our caller is BindToTree). + mHrefTarget.Reset(aParent, targetURI); + } else { + // if we don't have a parent, then there's no animateMotion element + // depending on our target, so there's no point tracking it right now. + mHrefTarget.Unlink(); + } + + // Start observing new target (if any) + if (mHrefTarget.get()) { + mHrefTarget.get()->AddMutationObserver(this); + } + + NotifyParentOfMpathChange(aParent); +} + +void +SVGMPathElement::UnlinkHrefTarget(bool aNotifyParent) +{ + // Stop observing old target (if any) + if (mHrefTarget.get()) { + mHrefTarget.get()->RemoveMutationObserver(this); + } + mHrefTarget.Unlink(); + + if (aNotifyParent) { + NotifyParentOfMpathChange(GetParent()); + } +} + +void +SVGMPathElement::NotifyParentOfMpathChange(nsIContent* aParent) +{ + if (aParent && aParent->IsSVGElement(nsGkAtoms::animateMotion)) { + + SVGAnimateMotionElement* animateMotionParent = + static_cast<SVGAnimateMotionElement*>(aParent); + + animateMotionParent->MpathChanged(); + AnimationNeedsResample(); + } +} + +} // namespace dom +} // namespace mozilla + |