gecko-dev/dom/svg/SVGAElement.cpp

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/* -*- 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/dom/SVGAElement.h"
#include "mozilla/Attributes.h"
#include "mozilla/EventDispatcher.h"
#include "mozilla/EventStates.h"
#include "mozilla/dom/SVGAElementBinding.h"
#include "nsCOMPtr.h"
#include "nsContentUtils.h"
#include "nsGkAtoms.h"
#include "nsSVGString.h"
#include "nsIURI.h"
NS_IMPL_NS_NEW_NAMESPACED_SVG_ELEMENT(A)
namespace mozilla {
namespace dom {
JSObject*
SVGAElement::WrapNode(JSContext *aCx, JS::Handle<JSObject*> aGivenProto)
{
return SVGAElementBinding::Wrap(aCx, this, aGivenProto);
}
nsSVGElement::StringInfo SVGAElement::sStringInfo[3] =
{
{ &nsGkAtoms::href, kNameSpaceID_None, true },
{ &nsGkAtoms::href, kNameSpaceID_XLink, true },
{ &nsGkAtoms::target, kNameSpaceID_None, true }
};
//----------------------------------------------------------------------
// nsISupports methods
NS_INTERFACE_MAP_BEGIN(SVGAElement)
NS_INTERFACE_MAP_ENTRY(nsIDOMNode)
NS_INTERFACE_MAP_ENTRY(nsIDOMElement)
NS_INTERFACE_MAP_ENTRY(nsIDOMSVGElement)
NS_INTERFACE_MAP_ENTRY(Link)
NS_INTERFACE_MAP_END_INHERITING(SVGAElementBase)
NS_IMPL_ADDREF_INHERITED(SVGAElement, SVGAElementBase)
NS_IMPL_RELEASE_INHERITED(SVGAElement, SVGAElementBase)
//----------------------------------------------------------------------
// Implementation
SVGAElement::SVGAElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
: SVGAElementBase(aNodeInfo)
, Link(this)
{
}
SVGAElement::~SVGAElement()
{
}
already_AddRefed<SVGAnimatedString>
SVGAElement::Href()
{
return mStringAttributes[HREF].IsExplicitlySet()
? mStringAttributes[HREF].ToDOMAnimatedString(this)
: mStringAttributes[XLINK_HREF].ToDOMAnimatedString(this);
}
//----------------------------------------------------------------------
// Link methods
bool
SVGAElement::ElementHasHref() const
{
return mStringAttributes[HREF].IsExplicitlySet() ||
mStringAttributes[XLINK_HREF].IsExplicitlySet();
}
//----------------------------------------------------------------------
// nsINode methods
nsresult
SVGAElement::GetEventTargetParent(EventChainPreVisitor& aVisitor)
{
nsresult rv = Element::GetEventTargetParent(aVisitor);
NS_ENSURE_SUCCESS(rv, rv);
return GetEventTargetParentForLinks(aVisitor);
}
nsresult
SVGAElement::PostHandleEvent(EventChainPostVisitor& aVisitor)
{
return PostHandleEventForLinks(aVisitor);
}
NS_IMPL_ELEMENT_CLONE_WITH_INIT(SVGAElement)
//----------------------------------------------------------------------
already_AddRefed<SVGAnimatedString>
SVGAElement::Target()
{
return mStringAttributes[TARGET].ToDOMAnimatedString(this);
}
void
SVGAElement::GetDownload(nsAString & aDownload)
{
GetAttr(kNameSpaceID_None, nsGkAtoms::download, aDownload);
}
void
SVGAElement::SetDownload(const nsAString & aDownload, ErrorResult& rv)
{
rv = SetAttr(kNameSpaceID_None, nsGkAtoms::download, aDownload, true);
}
//----------------------------------------------------------------------
// nsIContent methods
nsresult
SVGAElement::BindToTree(nsIDocument *aDocument, nsIContent *aParent,
nsIContent *aBindingParent,
bool aCompileEventHandlers)
{
Link::ResetLinkState(false, Link::ElementHasHref());
nsresult rv = SVGAElementBase::BindToTree(aDocument, aParent,
aBindingParent,
aCompileEventHandlers);
NS_ENSURE_SUCCESS(rv, rv);
nsIDocument* doc = GetComposedDoc();
if (doc) {
doc->RegisterPendingLinkUpdate(this);
}
return NS_OK;
}
void
SVGAElement::UnbindFromTree(bool aDeep, bool aNullParent)
{
// If this link is ever reinserted into a document, it might
// be under a different xml:base, so forget the cached state now.
Link::ResetLinkState(false, Link::ElementHasHref());
SVGAElementBase::UnbindFromTree(aDeep, aNullParent);
}
already_AddRefed<nsIURI>
SVGAElement::GetHrefURI() const
{
nsCOMPtr<nsIURI> hrefURI;
return IsLink(getter_AddRefs(hrefURI)) ? hrefURI.forget() : nullptr;
}
NS_IMETHODIMP_(bool)
SVGAElement::IsAttributeMapped(const nsAtom* name) const
{
static const MappedAttributeEntry* const map[] = {
sFEFloodMap,
sFiltersMap,
sFontSpecificationMap,
sGradientStopMap,
sLightingEffectsMap,
sMarkersMap,
sTextContentElementsMap,
sViewportsMap
};
return FindAttributeDependence(name, map) ||
SVGAElementBase::IsAttributeMapped(name);
}
int32_t
SVGAElement::TabIndexDefault()
{
return 0;
}
static bool
IsNodeInEditableRegion(nsINode* aNode)
{
while (aNode) {
if (aNode->IsEditable()) {
return true;
}
aNode = aNode->GetParent();
}
return false;
}
bool
SVGAElement::IsSVGFocusable(bool* aIsFocusable, int32_t* aTabIndex)
{
if (nsSVGElement::IsSVGFocusable(aIsFocusable, aTabIndex)) {
return true;
}
// cannot focus links if there is no link handler
nsIDocument* doc = GetComposedDoc();
if (doc) {
nsIPresShell* presShell = doc->GetShell();
if (presShell) {
nsPresContext* presContext = presShell->GetPresContext();
if (presContext && !presContext->GetLinkHandler()) {
*aIsFocusable = false;
return false;
}
}
}
// Links that are in an editable region should never be focusable, even if
// they are in a contenteditable="false" region.
if (IsNodeInEditableRegion(this)) {
if (aTabIndex) {
*aTabIndex = -1;
}
*aIsFocusable = false;
return true;
}
if (!HasAttr(kNameSpaceID_None, nsGkAtoms::tabindex)) {
// check whether we're actually a link
if (!Link::HasURI()) {
// Not tabbable or focusable without href (bug 17605), unless
// forced to be via presence of nonnegative tabindex attribute
if (aTabIndex) {
*aTabIndex = -1;
}
*aIsFocusable = false;
return false;
}
}
if (aTabIndex && (sTabFocusModel & eTabFocus_linksMask) == 0) {
*aTabIndex = -1;
}
*aIsFocusable = true;
return false;
}
bool
SVGAElement::IsLink(nsIURI** aURI) const
{
// To be a clickable XLink for styling and interaction purposes, we require:
//
// xlink:href - must be set
// xlink:type - must be unset or set to "" or set to "simple"
// xlink:show - must be unset or set to "", "new" or "replace"
// xlink:actuate - must be unset or set to "" or "onRequest"
//
// For any other values, we're either not a *clickable* XLink, or the end
// result is poorly specified. Either way, we return false.
static Element::AttrValuesArray sTypeVals[] =
{ &nsGkAtoms::_empty, &nsGkAtoms::simple, nullptr };
static Element::AttrValuesArray sShowVals[] =
{ &nsGkAtoms::_empty, &nsGkAtoms::_new, &nsGkAtoms::replace, nullptr };
static Element::AttrValuesArray sActuateVals[] =
{ &nsGkAtoms::_empty, &nsGkAtoms::onRequest, nullptr };
// Optimization: check for href first for early return
bool useBareHref = mStringAttributes[HREF].IsExplicitlySet();
if ((useBareHref || mStringAttributes[XLINK_HREF].IsExplicitlySet()) &&
FindAttrValueIn(kNameSpaceID_XLink, nsGkAtoms::type,
sTypeVals, eCaseMatters) !=
Element::ATTR_VALUE_NO_MATCH &&
FindAttrValueIn(kNameSpaceID_XLink, nsGkAtoms::show,
sShowVals, eCaseMatters) !=
Element::ATTR_VALUE_NO_MATCH &&
FindAttrValueIn(kNameSpaceID_XLink, nsGkAtoms::actuate,
sActuateVals, eCaseMatters) !=
Element::ATTR_VALUE_NO_MATCH) {
nsCOMPtr<nsIURI> baseURI = GetBaseURI();
// Get absolute URI
nsAutoString str;
const uint8_t idx = useBareHref ? HREF : XLINK_HREF;
mStringAttributes[idx].GetAnimValue(str, this);
nsContentUtils::NewURIWithDocumentCharset(aURI, str, OwnerDoc(), baseURI);
// must promise out param is non-null if we return true
return !!*aURI;
}
*aURI = nullptr;
return false;
}
void
SVGAElement::GetLinkTarget(nsAString& aTarget)
{
mStringAttributes[TARGET].GetAnimValue(aTarget, this);
if (aTarget.IsEmpty()) {
static Element::AttrValuesArray sShowVals[] =
{ &nsGkAtoms::_new, &nsGkAtoms::replace, nullptr };
switch (FindAttrValueIn(kNameSpaceID_XLink, nsGkAtoms::show,
sShowVals, eCaseMatters)) {
case 0:
aTarget.AssignLiteral("_blank");
return;
case 1:
return;
}
nsIDocument* ownerDoc = OwnerDoc();
if (ownerDoc) {
ownerDoc->GetBaseTarget(aTarget);
}
}
}
EventStates
SVGAElement::IntrinsicState() const
{
return Link::LinkState() | SVGAElementBase::IntrinsicState();
}
nsresult
SVGAElement::AfterSetAttr(int32_t aNameSpaceID, nsAtom* aName,
const nsAttrValue* aValue,
const nsAttrValue* aOldValue,
nsIPrincipal* aMaybeScriptedPrincipal,
bool aNotify)
{
if (aName == nsGkAtoms::href &&
(aNameSpaceID == kNameSpaceID_XLink ||
aNameSpaceID == kNameSpaceID_None)) {
// We can't assume that null aValue means we no longer have an href, because
// we could be unsetting xlink:href but still have a null-namespace href, or
// vice versa. But we can fast-path the case when we _do_ have a new value.
Link::ResetLinkState(aNotify, aValue || Link::ElementHasHref());
}
return SVGAElementBase::AfterSetAttr(aNameSpaceID, aName, aValue, aOldValue,
aMaybeScriptedPrincipal, aNotify);
}
//----------------------------------------------------------------------
// nsSVGElement methods
nsSVGElement::StringAttributesInfo
SVGAElement::GetStringInfo()
{
return StringAttributesInfo(mStringAttributes, sStringInfo,
ArrayLength(sStringInfo));
}
} // namespace dom
} // namespace mozilla