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gecko/content/base/src/Element.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 sw=2 et tw=79: */
/* 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/. */
/*
* Base class for all element classes; this provides an implementation
* of DOM Core's nsIDOMElement, implements nsIContent, provides
* utility methods for subclasses, and so forth.
*/
#include "mozilla/DebugOnly.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/Attr.h"
#include "nsDOMAttributeMap.h"
#include "nsIAtom.h"
#include "nsINodeInfo.h"
#include "nsIDocumentInlines.h"
#include "nsIDOMNodeList.h"
#include "nsIDOMDocument.h"
#include "nsIContentIterator.h"
#include "nsEventListenerManager.h"
#include "nsFocusManager.h"
#include "nsILinkHandler.h"
#include "nsIScriptGlobalObject.h"
#include "nsIURL.h"
#include "nsNetUtil.h"
#include "nsIFrame.h"
#include "nsIAnonymousContentCreator.h"
#include "nsIPresShell.h"
#include "nsPresContext.h"
#include "nsStyleConsts.h"
#include "nsString.h"
#include "nsUnicharUtils.h"
#include "nsEventStateManager.h"
#include "nsIDOMEvent.h"
#include "nsDOMCID.h"
#include "nsIServiceManager.h"
#include "nsIDOMCSSStyleDeclaration.h"
#include "nsDOMCSSAttrDeclaration.h"
#include "nsINameSpaceManager.h"
#include "nsContentList.h"
#include "nsDOMTokenList.h"
#include "nsXBLPrototypeBinding.h"
#include "nsError.h"
#include "nsDOMString.h"
#include "nsIScriptSecurityManager.h"
#include "nsIDOMMutationEvent.h"
#include "nsMutationEvent.h"
#include "nsNodeUtils.h"
#include "mozilla/dom/DirectionalityUtils.h"
#include "nsDocument.h"
#include "nsAttrValueOrString.h"
#include "nsAttrValueInlines.h"
#ifdef MOZ_XUL
#include "nsXULElement.h"
#endif /* MOZ_XUL */
#include "nsFrameManager.h"
#include "nsFrameSelection.h"
#ifdef DEBUG
#include "nsRange.h"
#endif
#include "nsBindingManager.h"
#include "nsXBLBinding.h"
#include "nsPIDOMWindow.h"
#include "nsPIBoxObject.h"
#include "nsClientRect.h"
#include "nsSVGUtils.h"
#include "nsLayoutUtils.h"
#include "nsGkAtoms.h"
#include "nsContentUtils.h"
#include "nsIJSContextStack.h"
#include "nsIDOMEventListener.h"
#include "nsIWebNavigation.h"
#include "nsIBaseWindow.h"
#include "nsIWidget.h"
#include "jsapi.h"
#include "nsNodeInfoManager.h"
#include "nsICategoryManager.h"
#include "nsIDOMDocumentType.h"
#include "nsIDOMUserDataHandler.h"
#include "nsGenericHTMLElement.h"
#include "nsIEditor.h"
#include "nsIEditorIMESupport.h"
#include "nsEventDispatcher.h"
#include "nsContentCreatorFunctions.h"
#include "nsIControllers.h"
#include "nsView.h"
#include "nsViewManager.h"
#include "nsIScrollableFrame.h"
#include "nsXBLInsertionPoint.h"
#include "mozilla/css/StyleRule.h" /* For nsCSSSelectorList */
#include "nsCSSRuleProcessor.h"
#include "nsRuleProcessorData.h"
#include "nsAsyncDOMEvent.h"
#include "nsTextNode.h"
#include "mozilla/dom/HTMLTemplateElement.h"
#ifdef MOZ_XUL
#include "nsIXULDocument.h"
#endif /* MOZ_XUL */
#include "nsCycleCollectionParticipant.h"
#include "nsCCUncollectableMarker.h"
#include "mozAutoDocUpdate.h"
#include "nsCSSParser.h"
#include "prprf.h"
#include "nsDOMMutationObserver.h"
#include "nsSVGFeatures.h"
#include "nsWrapperCacheInlines.h"
#include "nsCycleCollector.h"
#include "xpcpublic.h"
#include "nsIScriptError.h"
#include "nsLayoutStatics.h"
#include "mozilla/Telemetry.h"
#include "mozilla/CORSMode.h"
#include "nsStyledElement.h"
#include "nsXBLService.h"
#include "nsContentCID.h"
#include "nsITextControlElement.h"
#include "mozilla/dom/DocumentFragment.h"
using namespace mozilla;
using namespace mozilla::dom;
nsEventStates
Element::IntrinsicState() const
{
return IsEditable() ? NS_EVENT_STATE_MOZ_READWRITE :
NS_EVENT_STATE_MOZ_READONLY;
}
void
Element::NotifyStateChange(nsEventStates aStates)
{
nsIDocument* doc = GetCurrentDoc();
if (doc) {
nsAutoScriptBlocker scriptBlocker;
doc->ContentStateChanged(this, aStates);
}
}
void
Element::UpdateLinkState(nsEventStates aState)
{
NS_ABORT_IF_FALSE(!aState.HasAtLeastOneOfStates(~(NS_EVENT_STATE_VISITED |
NS_EVENT_STATE_UNVISITED)),
"Unexpected link state bits");
mState =
(mState & ~(NS_EVENT_STATE_VISITED | NS_EVENT_STATE_UNVISITED)) |
aState;
}
void
Element::UpdateState(bool aNotify)
{
nsEventStates oldState = mState;
mState = IntrinsicState() | (oldState & ESM_MANAGED_STATES);
if (aNotify) {
nsEventStates changedStates = oldState ^ mState;
if (!changedStates.IsEmpty()) {
nsIDocument* doc = GetCurrentDoc();
if (doc) {
nsAutoScriptBlocker scriptBlocker;
doc->ContentStateChanged(this, changedStates);
}
}
}
}
void
nsIContent::UpdateEditableState(bool aNotify)
{
// Guaranteed to be non-element content
NS_ASSERTION(!IsElement(), "What happened here?");
nsIContent *parent = GetParent();
SetEditableFlag(parent && parent->HasFlag(NODE_IS_EDITABLE));
}
void
Element::UpdateEditableState(bool aNotify)
{
nsIContent *parent = GetParent();
SetEditableFlag(parent && parent->HasFlag(NODE_IS_EDITABLE));
if (aNotify) {
UpdateState(aNotify);
} else {
// Avoid calling UpdateState in this very common case, because
// this gets called for pretty much every single element on
// insertion into the document and UpdateState can be slow for
// some kinds of elements even when not notifying.
if (IsEditable()) {
RemoveStatesSilently(NS_EVENT_STATE_MOZ_READONLY);
AddStatesSilently(NS_EVENT_STATE_MOZ_READWRITE);
} else {
RemoveStatesSilently(NS_EVENT_STATE_MOZ_READWRITE);
AddStatesSilently(NS_EVENT_STATE_MOZ_READONLY);
}
}
}
nsEventStates
Element::StyleStateFromLocks() const
{
nsEventStates locks = LockedStyleStates();
nsEventStates state = mState | locks;
if (locks.HasState(NS_EVENT_STATE_VISITED)) {
return state & ~NS_EVENT_STATE_UNVISITED;
}
if (locks.HasState(NS_EVENT_STATE_UNVISITED)) {
return state & ~NS_EVENT_STATE_VISITED;
}
return state;
}
nsEventStates
Element::LockedStyleStates() const
{
nsEventStates *locks =
static_cast<nsEventStates*> (GetProperty(nsGkAtoms::lockedStyleStates));
if (locks) {
return *locks;
}
return nsEventStates();
}
static void
nsEventStatesPropertyDtor(void *aObject, nsIAtom *aProperty,
void *aPropertyValue, void *aData)
{
nsEventStates *states = static_cast<nsEventStates*>(aPropertyValue);
delete states;
}
void
Element::NotifyStyleStateChange(nsEventStates aStates)
{
nsIDocument* doc = GetCurrentDoc();
if (doc) {
nsIPresShell *presShell = doc->GetShell();
if (presShell) {
nsAutoScriptBlocker scriptBlocker;
presShell->ContentStateChanged(doc, this, aStates);
}
}
}
void
Element::LockStyleStates(nsEventStates aStates)
{
nsEventStates *locks = new nsEventStates(LockedStyleStates());
*locks |= aStates;
if (aStates.HasState(NS_EVENT_STATE_VISITED)) {
*locks &= ~NS_EVENT_STATE_UNVISITED;
}
if (aStates.HasState(NS_EVENT_STATE_UNVISITED)) {
*locks &= ~NS_EVENT_STATE_VISITED;
}
SetProperty(nsGkAtoms::lockedStyleStates, locks, nsEventStatesPropertyDtor);
SetHasLockedStyleStates();
NotifyStyleStateChange(aStates);
}
void
Element::UnlockStyleStates(nsEventStates aStates)
{
nsEventStates *locks = new nsEventStates(LockedStyleStates());
*locks &= ~aStates;
if (locks->IsEmpty()) {
DeleteProperty(nsGkAtoms::lockedStyleStates);
ClearHasLockedStyleStates();
delete locks;
}
else {
SetProperty(nsGkAtoms::lockedStyleStates, locks, nsEventStatesPropertyDtor);
}
NotifyStyleStateChange(aStates);
}
void
Element::ClearStyleStateLocks()
{
nsEventStates locks = LockedStyleStates();
DeleteProperty(nsGkAtoms::lockedStyleStates);
ClearHasLockedStyleStates();
NotifyStyleStateChange(locks);
}
bool
Element::GetBindingURL(nsIDocument *aDocument, css::URLValue **aResult)
{
// If we have a frame the frame has already loaded the binding. And
// otherwise, don't do anything else here unless we're dealing with
// XUL or an HTML element that may have a plugin-related overlay
// (i.e. object, embed, or applet).
bool isXULorPluginElement = (IsXUL() ||
IsHTML(nsGkAtoms::object) ||
IsHTML(nsGkAtoms::embed) ||
IsHTML(nsGkAtoms::applet));
nsIPresShell *shell = aDocument->GetShell();
if (!shell || GetPrimaryFrame() || !isXULorPluginElement) {
*aResult = nullptr;
return true;
}
// Get the computed -moz-binding directly from the style context
nsPresContext *pctx = shell->GetPresContext();
NS_ENSURE_TRUE(pctx, false);
nsRefPtr<nsStyleContext> sc = pctx->StyleSet()->ResolveStyleFor(this,
nullptr);
NS_ENSURE_TRUE(sc, false);
*aResult = sc->StyleDisplay()->mBinding;
return true;
}
JSObject*
Element::WrapObject(JSContext *aCx, JS::Handle<JSObject*> aScope)
{
JSObject* obj = nsINode::WrapObject(aCx, aScope);
if (!obj) {
return nullptr;
}
nsIDocument* doc;
if (HasFlag(NODE_FORCE_XBL_BINDINGS)) {
doc = OwnerDoc();
}
else {
doc = GetCurrentDoc();
}
if (!doc) {
// There's no baseclass that cares about this call so we just
// return here.
return obj;
}
// We must ensure that the XBL Binding is installed before we hand
// back this object.
if (HasFlag(NODE_MAY_BE_IN_BINDING_MNGR) &&
doc->BindingManager()->GetBinding(this)) {
// There's already a binding for this element so nothing left to
// be done here.
// In theory we could call ExecuteAttachedHandler here when it's safe to
// run script if we also removed the binding from the PAQ queue, but that
// seems like a scary change that would mosly just add more
// inconsistencies.
return obj;
}
// Make sure the style context goes away _before_ we load the binding
// since that can destroy the relevant presshell.
mozilla::css::URLValue *bindingURL;
bool ok = GetBindingURL(doc, &bindingURL);
if (!ok) {
dom::Throw<true>(aCx, NS_ERROR_FAILURE);
return nullptr;
}
if (!bindingURL) {
// No binding, nothing left to do here.
return obj;
}
nsCOMPtr<nsIURI> uri = bindingURL->GetURI();
nsCOMPtr<nsIPrincipal> principal = bindingURL->mOriginPrincipal;
// We have a binding that must be installed.
bool dummy;
nsXBLService* xblService = nsXBLService::GetInstance();
if (!xblService) {
dom::Throw<true>(aCx, NS_ERROR_NOT_AVAILABLE);
return nullptr;
}
nsRefPtr<nsXBLBinding> binding;
xblService->LoadBindings(this, uri, principal, getter_AddRefs(binding), &dummy);
if (binding) {
if (nsContentUtils::IsSafeToRunScript()) {
binding->ExecuteAttachedHandler();
}
else {
nsContentUtils::AddScriptRunner(
NS_NewRunnableMethod(binding, &nsXBLBinding::ExecuteAttachedHandler));
}
}
return obj;
}
Element*
Element::GetFirstElementChild() const
{
uint32_t i, count = mAttrsAndChildren.ChildCount();
for (i = 0; i < count; ++i) {
nsIContent* child = mAttrsAndChildren.ChildAt(i);
if (child->IsElement()) {
return child->AsElement();
}
}
return nullptr;
}
Element*
Element::GetLastElementChild() const
{
uint32_t i = mAttrsAndChildren.ChildCount();
while (i > 0) {
nsIContent* child = mAttrsAndChildren.ChildAt(--i);
if (child->IsElement()) {
return child->AsElement();
}
}
return nullptr;
}
nsDOMTokenList*
Element::GetClassList()
{
Element::nsDOMSlots *slots = DOMSlots();
if (!slots->mClassList) {
nsIAtom* classAttr = GetClassAttributeName();
if (classAttr) {
slots->mClassList = new nsDOMTokenList(this, classAttr);
}
}
return slots->mClassList;
}
void
Element::GetClassList(nsISupports** aClassList)
{
NS_IF_ADDREF(*aClassList = GetClassList());
}
already_AddRefed<nsIHTMLCollection>
Element::GetElementsByTagName(const nsAString& aLocalName)
{
return NS_GetContentList(this, kNameSpaceID_Unknown, aLocalName);
}
void
Element::GetElementsByTagName(const nsAString& aLocalName,
nsIDOMHTMLCollection** aResult)
{
*aResult = GetElementsByTagName(aLocalName).get();
}
nsIFrame*
Element::GetStyledFrame()
{
nsIFrame *frame = GetPrimaryFrame(Flush_Layout);
return frame ? nsLayoutUtils::GetStyleFrame(frame) : nullptr;
}
Element*
Element::GetOffsetRect(nsRect& aRect)
{
aRect = nsRect();
nsIFrame* frame = GetStyledFrame();
if (!frame) {
return nullptr;
}
nsPoint origin = frame->GetPosition();
aRect.x = nsPresContext::AppUnitsToIntCSSPixels(origin.x);
aRect.y = nsPresContext::AppUnitsToIntCSSPixels(origin.y);
// Get the union of all rectangles in this and continuation frames.
// It doesn't really matter what we use as aRelativeTo here, since
// we only care about the size. Using 'parent' might make things
// a bit faster by speeding up the internal GetOffsetTo operations.
nsIFrame* parent = frame->GetParent() ? frame->GetParent() : frame;
nsRect rcFrame = nsLayoutUtils::GetAllInFlowRectsUnion(frame, parent);
aRect.width = nsPresContext::AppUnitsToIntCSSPixels(rcFrame.width);
aRect.height = nsPresContext::AppUnitsToIntCSSPixels(rcFrame.height);
return nullptr;
}
nsIScrollableFrame*
Element::GetScrollFrame(nsIFrame **aStyledFrame)
{
// it isn't clear what to return for SVG nodes, so just return nothing
if (IsSVG()) {
if (aStyledFrame) {
*aStyledFrame = nullptr;
}
return nullptr;
}
nsIFrame* frame = GetStyledFrame();
if (aStyledFrame) {
*aStyledFrame = frame;
}
if (!frame) {
return nullptr;
}
// menu frames implement GetScrollTargetFrame but we don't want
// to use it here. Similar for comboboxes.
if (frame->GetType() != nsGkAtoms::menuFrame &&
frame->GetType() != nsGkAtoms::comboboxControlFrame) {
nsIScrollableFrame *scrollFrame = frame->GetScrollTargetFrame();
if (scrollFrame)
return scrollFrame;
}
nsIDocument* doc = OwnerDoc();
bool quirksMode = doc->GetCompatibilityMode() == eCompatibility_NavQuirks;
Element* elementWithRootScrollInfo =
quirksMode ? doc->GetBodyElement() : doc->GetRootElement();
if (this == elementWithRootScrollInfo) {
// In quirks mode, the scroll info for the body element should map to the
// root scrollable frame.
// In strict mode, the scroll info for the root element should map to the
// the root scrollable frame.
return frame->PresContext()->PresShell()->GetRootScrollFrameAsScrollable();
}
return nullptr;
}
void
Element::ScrollIntoView(bool aTop)
{
nsIDocument *document = GetCurrentDoc();
if (!document) {
return;
}
// Get the presentation shell
nsCOMPtr<nsIPresShell> presShell = document->GetShell();
if (!presShell) {
return;
}
int16_t vpercent = aTop ? nsIPresShell::SCROLL_TOP :
nsIPresShell::SCROLL_BOTTOM;
presShell->ScrollContentIntoView(this,
nsIPresShell::ScrollAxis(
vpercent,
nsIPresShell::SCROLL_ALWAYS),
nsIPresShell::ScrollAxis(),
nsIPresShell::SCROLL_OVERFLOW_HIDDEN);
}
static nsSize GetScrollRectSizeForOverflowVisibleFrame(nsIFrame* aFrame)
{
if (!aFrame) {
return nsSize(0,0);
}
nsRect paddingRect = aFrame->GetPaddingRectRelativeToSelf();
nsOverflowAreas overflowAreas(paddingRect, paddingRect);
// Add the scrollable overflow areas of children (if any) to the paddingRect.
// It's important to start with the paddingRect, otherwise if there are no
// children the overflow rect will be 0,0,0,0 which will force the point 0,0
// to be included in the final rect.
nsLayoutUtils::UnionChildOverflow(aFrame, overflowAreas);
// Make sure that an empty padding-rect's edges are included, by adding
// the padding-rect in again with UnionEdges.
nsRect overflowRect =
overflowAreas.ScrollableOverflow().UnionEdges(paddingRect);
return nsLayoutUtils::GetScrolledRect(aFrame,
overflowRect, paddingRect.Size(),
aFrame->StyleVisibility()->mDirection).Size();
}
int32_t
Element::ScrollHeight()
{
if (IsSVG())
return 0;
nsIScrollableFrame* sf = GetScrollFrame();
nscoord height;
if (sf) {
height = sf->GetScrollRange().height + sf->GetScrollPortRect().height;
} else {
height = GetScrollRectSizeForOverflowVisibleFrame(GetStyledFrame()).height;
}
return nsPresContext::AppUnitsToIntCSSPixels(height);
}
int32_t
Element::ScrollWidth()
{
if (IsSVG())
return 0;
nsIScrollableFrame* sf = GetScrollFrame();
nscoord width;
if (sf) {
width = sf->GetScrollRange().width + sf->GetScrollPortRect().width;
} else {
width = GetScrollRectSizeForOverflowVisibleFrame(GetStyledFrame()).width;
}
return nsPresContext::AppUnitsToIntCSSPixels(width);
}
nsRect
Element::GetClientAreaRect()
{
nsIFrame* styledFrame;
nsIScrollableFrame* sf = GetScrollFrame(&styledFrame);
if (sf) {
return sf->GetScrollPortRect();
}
if (styledFrame &&
(styledFrame->StyleDisplay()->mDisplay != NS_STYLE_DISPLAY_INLINE ||
styledFrame->IsFrameOfType(nsIFrame::eReplaced))) {
// Special case code to make client area work even when there isn't
// a scroll view, see bug 180552, bug 227567.
return styledFrame->GetPaddingRect() - styledFrame->GetPositionIgnoringScrolling();
}
// SVG nodes reach here and just return 0
return nsRect(0, 0, 0, 0);
}
already_AddRefed<nsClientRect>
Element::GetBoundingClientRect()
{
nsRefPtr<nsClientRect> rect = new nsClientRect(this);
nsIFrame* frame = GetPrimaryFrame(Flush_Layout);
if (!frame) {
// display:none, perhaps? Return the empty rect
return rect.forget();
}
nsRect r = nsLayoutUtils::GetAllInFlowRectsUnion(frame,
nsLayoutUtils::GetContainingBlockForClientRect(frame),
nsLayoutUtils::RECTS_ACCOUNT_FOR_TRANSFORMS);
rect->SetLayoutRect(r);
return rect.forget();
}
already_AddRefed<nsClientRectList>
Element::GetClientRects()
{
nsRefPtr<nsClientRectList> rectList = new nsClientRectList(this);
nsIFrame* frame = GetPrimaryFrame(Flush_Layout);
if (!frame) {
// display:none, perhaps? Return an empty list
return rectList.forget();
}
nsLayoutUtils::RectListBuilder builder(rectList);
nsLayoutUtils::GetAllInFlowRects(frame,
nsLayoutUtils::GetContainingBlockForClientRect(frame), &builder,
nsLayoutUtils::RECTS_ACCOUNT_FOR_TRANSFORMS);
return rectList.forget();
}
//----------------------------------------------------------------------
void
Element::GetAttribute(const nsAString& aName, DOMString& aReturn)
{
const nsAttrValue* val =
mAttrsAndChildren.GetAttr(aName,
IsHTML() && IsInHTMLDocument() ?
eIgnoreCase : eCaseMatters);
if (val) {
val->ToString(aReturn);
} else {
if (IsXUL()) {
// XXX should be SetDOMStringToNull(aReturn);
// See bug 232598
// aReturn is already empty
} else {
aReturn.SetNull();
}
}
}
void
Element::SetAttribute(const nsAString& aName,
const nsAString& aValue,
ErrorResult& aError)
{
const nsAttrName* name = InternalGetExistingAttrNameFromQName(aName);
if (!name) {
aError = nsContentUtils::CheckQName(aName, false);
if (aError.Failed()) {
return;
}
nsCOMPtr<nsIAtom> nameAtom;
if (IsHTML() && IsInHTMLDocument()) {
nsAutoString lower;
nsresult rv = nsContentUtils::ASCIIToLower(aName, lower);
if (NS_SUCCEEDED(rv)) {
nameAtom = do_GetAtom(lower);
}
}
else {
nameAtom = do_GetAtom(aName);
}
if (!nameAtom) {
aError.Throw(NS_ERROR_OUT_OF_MEMORY);
return;
}
aError = SetAttr(kNameSpaceID_None, nameAtom, aValue, true);
return;
}
aError = SetAttr(name->NamespaceID(), name->LocalName(), name->GetPrefix(),
aValue, true);
return;
}
void
Element::RemoveAttribute(const nsAString& aName, ErrorResult& aError)
{
const nsAttrName* name = InternalGetExistingAttrNameFromQName(aName);
if (!name) {
// If there is no canonical nsAttrName for this attribute name, then the
// attribute does not exist and we can't get its namespace ID and
// local name below, so we return early.
return;
}
// Hold a strong reference here so that the atom or nodeinfo doesn't go
// away during UnsetAttr. If it did UnsetAttr would be left with a
// dangling pointer as argument without knowing it.
nsAttrName tmp(*name);
aError = UnsetAttr(name->NamespaceID(), name->LocalName(), true);
}
Attr*
Element::GetAttributeNode(const nsAString& aName)
{
OwnerDoc()->WarnOnceAbout(nsIDocument::eGetAttributeNode);
return Attributes()->GetNamedItem(aName);
}
already_AddRefed<Attr>
Element::SetAttributeNode(Attr& aNewAttr, ErrorResult& aError)
{
OwnerDoc()->WarnOnceAbout(nsIDocument::eSetAttributeNode);
return Attributes()->SetNamedItem(aNewAttr, aError);
}
already_AddRefed<Attr>
Element::RemoveAttributeNode(Attr& aAttribute,
ErrorResult& aError)
{
OwnerDoc()->WarnOnceAbout(nsIDocument::eRemoveAttributeNode);
return Attributes()->RemoveNamedItem(aAttribute.NodeName(), aError);
}
void
Element::GetAttributeNS(const nsAString& aNamespaceURI,
const nsAString& aLocalName,
nsAString& aReturn)
{
int32_t nsid =
nsContentUtils::NameSpaceManager()->GetNameSpaceID(aNamespaceURI);
if (nsid == kNameSpaceID_Unknown) {
// Unknown namespace means no attribute.
SetDOMStringToNull(aReturn);
return;
}
nsCOMPtr<nsIAtom> name = do_GetAtom(aLocalName);
bool hasAttr = GetAttr(nsid, name, aReturn);
if (!hasAttr) {
SetDOMStringToNull(aReturn);
}
}
void
Element::SetAttributeNS(const nsAString& aNamespaceURI,
const nsAString& aQualifiedName,
const nsAString& aValue,
ErrorResult& aError)
{
nsCOMPtr<nsINodeInfo> ni;
aError =
nsContentUtils::GetNodeInfoFromQName(aNamespaceURI, aQualifiedName,
mNodeInfo->NodeInfoManager(),
nsIDOMNode::ATTRIBUTE_NODE,
getter_AddRefs(ni));
if (aError.Failed()) {
return;
}
aError = SetAttr(ni->NamespaceID(), ni->NameAtom(), ni->GetPrefixAtom(),
aValue, true);
}
void
Element::RemoveAttributeNS(const nsAString& aNamespaceURI,
const nsAString& aLocalName,
ErrorResult& aError)
{
nsCOMPtr<nsIAtom> name = do_GetAtom(aLocalName);
int32_t nsid =
nsContentUtils::NameSpaceManager()->GetNameSpaceID(aNamespaceURI);
if (nsid == kNameSpaceID_Unknown) {
// If the namespace ID is unknown, it means there can't possibly be an
// existing attribute. We would need a known namespace ID to pass into
// UnsetAttr, so we return early if we don't have one.
return;
}
aError = UnsetAttr(nsid, name, true);
}
Attr*
Element::GetAttributeNodeNS(const nsAString& aNamespaceURI,
const nsAString& aLocalName)
{
OwnerDoc()->WarnOnceAbout(nsIDocument::eGetAttributeNodeNS);
return GetAttributeNodeNSInternal(aNamespaceURI, aLocalName);
}
Attr*
Element::GetAttributeNodeNSInternal(const nsAString& aNamespaceURI,
const nsAString& aLocalName)
{
return Attributes()->GetNamedItemNS(aNamespaceURI, aLocalName);
}
already_AddRefed<Attr>
Element::SetAttributeNodeNS(Attr& aNewAttr,
ErrorResult& aError)
{
OwnerDoc()->WarnOnceAbout(nsIDocument::eSetAttributeNodeNS);
return Attributes()->SetNamedItemNS(aNewAttr, aError);
}
already_AddRefed<nsIHTMLCollection>
Element::GetElementsByTagNameNS(const nsAString& aNamespaceURI,
const nsAString& aLocalName,
ErrorResult& aError)
{
int32_t nameSpaceId = kNameSpaceID_Wildcard;
if (!aNamespaceURI.EqualsLiteral("*")) {
aError =
nsContentUtils::NameSpaceManager()->RegisterNameSpace(aNamespaceURI,
nameSpaceId);
if (aError.Failed()) {
return nullptr;
}
}
NS_ASSERTION(nameSpaceId != kNameSpaceID_Unknown, "Unexpected namespace ID!");
return NS_GetContentList(this, nameSpaceId, aLocalName);
}
nsresult
Element::GetElementsByTagNameNS(const nsAString& namespaceURI,
const nsAString& localName,
nsIDOMHTMLCollection** aResult)
{
mozilla::ErrorResult rv;
nsCOMPtr<nsIHTMLCollection> list =
GetElementsByTagNameNS(namespaceURI, localName, rv);
if (rv.Failed()) {
return rv.ErrorCode();
}
list.forget(aResult);
return NS_OK;
}
bool
Element::HasAttributeNS(const nsAString& aNamespaceURI,
const nsAString& aLocalName) const
{
int32_t nsid =
nsContentUtils::NameSpaceManager()->GetNameSpaceID(aNamespaceURI);
if (nsid == kNameSpaceID_Unknown) {
// Unknown namespace means no attr...
return false;
}
nsCOMPtr<nsIAtom> name = do_GetAtom(aLocalName);
return HasAttr(nsid, name);
}
static nsXBLBinding*
GetFirstBindingWithContent(nsBindingManager* aBmgr, nsIContent* aBoundElem)
{
nsXBLBinding* binding = aBmgr->GetBinding(aBoundElem);
while (binding) {
if (binding->GetAnonymousContent()) {
return binding;
}
binding = binding->GetBaseBinding();
}
return nullptr;
}
static nsresult
BindNodesInInsertPoints(nsXBLBinding* aBinding, nsIContent* aInsertParent,
nsIDocument* aDocument)
{
NS_PRECONDITION(aBinding && aInsertParent, "Missing arguments");
nsresult rv;
// These should be refcounted or otherwise protectable.
nsInsertionPointList* inserts =
aBinding->GetExistingInsertionPointsFor(aInsertParent);
if (inserts) {
bool allowScripts = aBinding->AllowScripts();
#ifdef MOZ_XUL
nsCOMPtr<nsIXULDocument> xulDoc = do_QueryInterface(aDocument);
#endif
uint32_t i;
for (i = 0; i < inserts->Length(); ++i) {
nsCOMPtr<nsIContent> insertRoot =
inserts->ElementAt(i)->GetDefaultContent();
if (insertRoot) {
for (nsCOMPtr<nsIContent> child = insertRoot->GetFirstChild();
child;
child = child->GetNextSibling()) {
rv = child->BindToTree(aDocument, aInsertParent,
aBinding->GetBoundElement(), allowScripts);
NS_ENSURE_SUCCESS(rv, rv);
#ifdef MOZ_XUL
if (xulDoc) {
xulDoc->AddSubtreeToDocument(child);
}
#endif
}
}
}
}
return NS_OK;
}
already_AddRefed<nsIHTMLCollection>
Element::GetElementsByClassName(const nsAString& aClassNames)
{
return nsContentUtils::GetElementsByClassName(this, aClassNames);
}
nsresult
Element::GetElementsByClassName(const nsAString& aClassNames,
nsIDOMHTMLCollection** aResult)
{
*aResult = nsContentUtils::GetElementsByClassName(this, aClassNames).get();
return NS_OK;
}
nsresult
Element::BindToTree(nsIDocument* aDocument, nsIContent* aParent,
nsIContent* aBindingParent,
bool aCompileEventHandlers)
{
NS_PRECONDITION(aParent || aDocument, "Must have document if no parent!");
NS_PRECONDITION(HasSameOwnerDoc(NODE_FROM(aParent, aDocument)),
"Must have the same owner document");
NS_PRECONDITION(!aParent || aDocument == aParent->GetCurrentDoc(),
"aDocument must be current doc of aParent");
NS_PRECONDITION(!GetCurrentDoc(), "Already have a document. Unbind first!");
// Note that as we recurse into the kids, they'll have a non-null parent. So
// only assert if our parent is _changing_ while we have a parent.
NS_PRECONDITION(!GetParent() || aParent == GetParent(),
"Already have a parent. Unbind first!");
NS_PRECONDITION(!GetBindingParent() ||
aBindingParent == GetBindingParent() ||
(!aBindingParent && aParent &&
aParent->GetBindingParent() == GetBindingParent()),
"Already have a binding parent. Unbind first!");
NS_PRECONDITION(!aParent || !aDocument ||
!aParent->HasFlag(NODE_FORCE_XBL_BINDINGS),
"Parent in document but flagged as forcing XBL");
NS_PRECONDITION(aBindingParent != this,
"Content must not be its own binding parent");
NS_PRECONDITION(!IsRootOfNativeAnonymousSubtree() ||
aBindingParent == aParent,
"Native anonymous content must have its parent as its "
"own binding parent");
NS_PRECONDITION(aBindingParent || !aParent ||
aBindingParent == aParent->GetBindingParent(),
"We should be passed the right binding parent");
#ifdef MOZ_XUL
// First set the binding parent
nsXULElement* xulElem = nsXULElement::FromContent(this);
if (xulElem) {
xulElem->SetXULBindingParent(aBindingParent);
}
else
#endif
{
if (aBindingParent) {
nsDOMSlots *slots = DOMSlots();
slots->mBindingParent = aBindingParent; // Weak, so no addref happens.
}
}
NS_ASSERTION(!aBindingParent || IsRootOfNativeAnonymousSubtree() ||
!HasFlag(NODE_IS_IN_ANONYMOUS_SUBTREE) ||
(aParent && aParent->IsInNativeAnonymousSubtree()),
"Trying to re-bind content from native anonymous subtree to "
"non-native anonymous parent!");
if (aParent) {
if (aParent->IsInNativeAnonymousSubtree()) {
SetFlags(NODE_IS_IN_ANONYMOUS_SUBTREE);
}
if (aParent->HasFlag(NODE_CHROME_ONLY_ACCESS)) {
SetFlags(NODE_CHROME_ONLY_ACCESS);
}
}
bool hadForceXBL = HasFlag(NODE_FORCE_XBL_BINDINGS);
// Now set the parent and set the "Force attach xbl" flag if needed.
if (aParent) {
if (!GetParent()) {
NS_ADDREF(aParent);
}
mParent = aParent;
if (aParent->HasFlag(NODE_FORCE_XBL_BINDINGS)) {
SetFlags(NODE_FORCE_XBL_BINDINGS);
}
}
else {
mParent = aDocument;
}
SetParentIsContent(aParent);
// XXXbz sXBL/XBL2 issue!
// Finally, set the document
if (aDocument) {
// Notify XBL- & nsIAnonymousContentCreator-generated
// anonymous content that the document is changing.
// XXXbz ordering issues here? Probably not, since ChangeDocumentFor is
// just pretty broken anyway.... Need to get it working.
// XXXbz XBL doesn't handle this (asserts), and we don't really want
// to be doing this during parsing anyway... sort this out.
// aDocument->BindingManager()->ChangeDocumentFor(this, nullptr,
// aDocument);
// We no longer need to track the subtree pointer (and in fact we'll assert
// if we do this any later).
ClearSubtreeRootPointer();
// Being added to a document.
SetInDocument();
// Unset this flag since we now really are in a document.
UnsetFlags(NODE_FORCE_XBL_BINDINGS |
// And clear the lazy frame construction bits.
NODE_NEEDS_FRAME | NODE_DESCENDANTS_NEED_FRAMES |
// And the restyle bits
ELEMENT_ALL_RESTYLE_FLAGS);
// Propagate scoped style sheet tracking bit.
SetIsElementInStyleScope(mParent->IsElementInStyleScope());
} else {
// If we're not in the doc, update our subtree pointer.
SetSubtreeRootPointer(aParent->SubtreeRoot());
}
// This has to be here, rather than in nsGenericHTMLElement::BindToTree,
// because it has to happen after updating the parent pointer, but before
// recursively binding the kids.
if (IsHTML()) {
SetDirOnBind(this, aParent);
}
// If NODE_FORCE_XBL_BINDINGS was set we might have anonymous children
// that also need to be told that they are moving.
nsresult rv;
if (hadForceXBL) {
nsBindingManager* bmgr = OwnerDoc()->BindingManager();
// First check if we have a binding...
nsXBLBinding* contBinding =
GetFirstBindingWithContent(bmgr, this);
if (contBinding) {
nsCOMPtr<nsIContent> anonRoot = contBinding->GetAnonymousContent();
bool allowScripts = contBinding->AllowScripts();
for (nsCOMPtr<nsIContent> child = anonRoot->GetFirstChild();
child;
child = child->GetNextSibling()) {
rv = child->BindToTree(aDocument, this, this, allowScripts);
NS_ENSURE_SUCCESS(rv, rv);
}
// ...then check if we have content in insertion points that are
// direct children of the <content>
rv = BindNodesInInsertPoints(contBinding, this, aDocument);
NS_ENSURE_SUCCESS(rv, rv);
}
// ...and finally check if we're in a binding where we have content in
// insertion points.
if (aBindingParent) {
nsXBLBinding* binding = bmgr->GetBinding(aBindingParent);
if (binding) {
rv = BindNodesInInsertPoints(binding, this, aDocument);
NS_ENSURE_SUCCESS(rv, rv);
}
}
}
UpdateEditableState(false);
// Now recurse into our kids
for (nsIContent* child = GetFirstChild(); child;
child = child->GetNextSibling()) {
rv = child->BindToTree(aDocument, this, aBindingParent,
aCompileEventHandlers);
NS_ENSURE_SUCCESS(rv, rv);
}
nsNodeUtils::ParentChainChanged(this);
if (aDocument && HasID() && !aBindingParent) {
aDocument->AddToIdTable(this, DoGetID());
}
if (MayHaveStyle() && !IsXUL()) {
// XXXbz if we already have a style attr parsed, this won't do
// anything... need to fix that.
// If MayHaveStyle() is true, we must be an nsStyledElement
static_cast<nsStyledElement*>(this)->ReparseStyleAttribute(false);
}
if (aDocument) {
// If we're in a document now, let our mapped attrs know what their new
// sheet is. This is safe to run for non-mapped-attribute elements too;
// it'll just do a small bit of unnecessary work. But most elements in
// practice are mapped-attribute elements.
nsHTMLStyleSheet* sheet = aDocument->GetAttributeStyleSheet();
if (sheet) {
mAttrsAndChildren.SetMappedAttrStyleSheet(sheet);
}
}
// XXXbz script execution during binding can trigger some of these
// postcondition asserts.... But we do want that, since things will
// generally be quite broken when that happens.
NS_POSTCONDITION(aDocument == GetCurrentDoc(), "Bound to wrong document");
NS_POSTCONDITION(aParent == GetParent(), "Bound to wrong parent");
NS_POSTCONDITION(aBindingParent == GetBindingParent(),
"Bound to wrong binding parent");
return NS_OK;
}
class RemoveFromBindingManagerRunnable : public nsRunnable {
public:
RemoveFromBindingManagerRunnable(nsBindingManager* aManager,
Element* aElement,
nsIDocument* aDoc,
nsIContent* aBindingParent):
mManager(aManager), mElement(aElement), mDoc(aDoc),
mBindingParent(aBindingParent)
{}
NS_IMETHOD Run()
{
mManager->RemovedFromDocumentInternal(mElement, mDoc, mBindingParent);
return NS_OK;
}
private:
nsRefPtr<nsBindingManager> mManager;
nsRefPtr<Element> mElement;
nsCOMPtr<nsIDocument> mDoc;
nsCOMPtr<nsIContent> mBindingParent;
};
void
Element::UnbindFromTree(bool aDeep, bool aNullParent)
{
NS_PRECONDITION(aDeep || (!GetCurrentDoc() && !GetBindingParent()),
"Shallow unbind won't clear document and binding parent on "
"kids!");
RemoveFromIdTable();
// Make sure to unbind this node before doing the kids
nsIDocument *document =
HasFlag(NODE_FORCE_XBL_BINDINGS) ? OwnerDoc() : GetCurrentDoc();
if (aNullParent) {
if (IsFullScreenAncestor()) {
// The element being removed is an ancestor of the full-screen element,
// exit full-screen state.
nsContentUtils::ReportToConsole(nsIScriptError::warningFlag,
"DOM", OwnerDoc(),
nsContentUtils::eDOM_PROPERTIES,
"RemovedFullScreenElement");
// Fully exit full-screen.
nsIDocument::ExitFullscreen(OwnerDoc(), /* async */ false);
}
if (HasPointerLock()) {
nsIDocument::UnlockPointer();
}
if (GetParent()) {
NS_RELEASE(mParent);
} else {
mParent = nullptr;
}
SetParentIsContent(false);
}
ClearInDocument();
// Begin keeping track of our subtree root.
SetSubtreeRootPointer(aNullParent ? this : mParent->SubtreeRoot());
if (document) {
// Notify XBL- & nsIAnonymousContentCreator-generated
// anonymous content that the document is changing.
if (HasFlag(NODE_MAY_BE_IN_BINDING_MNGR)) {
nsContentUtils::AddScriptRunner(
new RemoveFromBindingManagerRunnable(document->BindingManager(), this,
document, GetBindingParent()));
}
document->ClearBoxObjectFor(this);
}
// Ensure that CSS transitions don't continue on an element at a
// different place in the tree (even if reinserted before next
// animation refresh).
// FIXME (Bug 522599): Need a test for this.
if (HasFlag(NODE_HAS_PROPERTIES)) {
DeleteProperty(nsGkAtoms::transitionsOfBeforeProperty);
DeleteProperty(nsGkAtoms::transitionsOfAfterProperty);
DeleteProperty(nsGkAtoms::transitionsProperty);
DeleteProperty(nsGkAtoms::animationsOfBeforeProperty);
DeleteProperty(nsGkAtoms::animationsOfAfterProperty);
DeleteProperty(nsGkAtoms::animationsProperty);
}
// Unset this since that's what the old code effectively did.
UnsetFlags(NODE_FORCE_XBL_BINDINGS);
#ifdef MOZ_XUL
nsXULElement* xulElem = nsXULElement::FromContent(this);
if (xulElem) {
xulElem->SetXULBindingParent(nullptr);
}
else
#endif
{
nsDOMSlots *slots = GetExistingDOMSlots();
if (slots) {
slots->mBindingParent = nullptr;
}
}
// This has to be here, rather than in nsGenericHTMLElement::UnbindFromTree,
// because it has to happen after unsetting the parent pointer, but before
// recursively unbinding the kids.
if (IsHTML()) {
ResetDir(this);
}
if (aDeep) {
// Do the kids. Don't call GetChildCount() here since that'll force
// XUL to generate template children, which there is no need for since
// all we're going to do is unbind them anyway.
uint32_t i, n = mAttrsAndChildren.ChildCount();
for (i = 0; i < n; ++i) {
// Note that we pass false for aNullParent here, since we don't want
// the kids to forget us. We _do_ want them to forget their binding
// parent, though, since this only walks non-anonymous kids.
mAttrsAndChildren.ChildAt(i)->UnbindFromTree(true, false);
}
}
nsNodeUtils::ParentChainChanged(this);
}
nsICSSDeclaration*
Element::GetSMILOverrideStyle()
{
Element::nsDOMSlots *slots = DOMSlots();
if (!slots->mSMILOverrideStyle) {
slots->mSMILOverrideStyle = new nsDOMCSSAttributeDeclaration(this, true);
}
return slots->mSMILOverrideStyle;
}
css::StyleRule*
Element::GetSMILOverrideStyleRule()
{
Element::nsDOMSlots *slots = GetExistingDOMSlots();
return slots ? slots->mSMILOverrideStyleRule.get() : nullptr;
}
nsresult
Element::SetSMILOverrideStyleRule(css::StyleRule* aStyleRule,
bool aNotify)
{
Element::nsDOMSlots *slots = DOMSlots();
slots->mSMILOverrideStyleRule = aStyleRule;
if (aNotify) {
nsIDocument* doc = GetCurrentDoc();
// Only need to request a restyle if we're in a document. (We might not
// be in a document, if we're clearing animation effects on a target node
// that's been detached since the previous animation sample.)
if (doc) {
nsCOMPtr<nsIPresShell> shell = doc->GetShell();
if (shell) {
shell->RestyleForAnimation(this, eRestyle_Self);
}
}
}
return NS_OK;
}
bool
Element::IsLabelable() const
{
return false;
}
css::StyleRule*
Element::GetInlineStyleRule()
{
return nullptr;
}
nsresult
Element::SetInlineStyleRule(css::StyleRule* aStyleRule,
const nsAString* aSerialized,
bool aNotify)
{
NS_NOTYETIMPLEMENTED("Element::SetInlineStyleRule");
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP_(bool)
Element::IsAttributeMapped(const nsIAtom* aAttribute) const
{
return false;
}
nsChangeHint
Element::GetAttributeChangeHint(const nsIAtom* aAttribute,
int32_t aModType) const
{
return nsChangeHint(0);
}
nsIAtom *
Element::GetClassAttributeName() const
{
return nullptr;
}
bool
Element::FindAttributeDependence(const nsIAtom* aAttribute,
const MappedAttributeEntry* const aMaps[],
uint32_t aMapCount)
{
for (uint32_t mapindex = 0; mapindex < aMapCount; ++mapindex) {
for (const MappedAttributeEntry* map = aMaps[mapindex];
map->attribute; ++map) {
if (aAttribute == *map->attribute) {
return true;
}
}
}
return false;
}
already_AddRefed<nsINodeInfo>
Element::GetExistingAttrNameFromQName(const nsAString& aStr) const
{
const nsAttrName* name = InternalGetExistingAttrNameFromQName(aStr);
if (!name) {
return nullptr;
}
nsINodeInfo* nodeInfo;
if (name->IsAtom()) {
nodeInfo = mNodeInfo->NodeInfoManager()->
GetNodeInfo(name->Atom(), nullptr, kNameSpaceID_None,
nsIDOMNode::ATTRIBUTE_NODE).get();
}
else {
NS_ADDREF(nodeInfo = name->NodeInfo());
}
return nodeInfo;
}
// static
bool
Element::ShouldBlur(nsIContent *aContent)
{
// Determine if the current element is focused, if it is not focused
// then we should not try to blur
nsIDocument *document = aContent->GetDocument();
if (!document)
return false;
nsCOMPtr<nsPIDOMWindow> window = do_QueryInterface(document->GetWindow());
if (!window)
return false;
nsCOMPtr<nsPIDOMWindow> focusedFrame;
nsIContent* contentToBlur =
nsFocusManager::GetFocusedDescendant(window, false, getter_AddRefs(focusedFrame));
if (contentToBlur == aContent)
return true;
// if focus on this element would get redirected, then check the redirected
// content as well when blurring.
return (contentToBlur && nsFocusManager::GetRedirectedFocus(aContent) == contentToBlur);
}
bool
Element::IsNodeOfType(uint32_t aFlags) const
{
return !(aFlags & ~eCONTENT);
}
/* static */
nsresult
Element::DispatchEvent(nsPresContext* aPresContext,
nsEvent* aEvent,
nsIContent* aTarget,
bool aFullDispatch,
nsEventStatus* aStatus)
{
NS_PRECONDITION(aTarget, "Must have target");
NS_PRECONDITION(aEvent, "Must have source event");
NS_PRECONDITION(aStatus, "Null out param?");
if (!aPresContext) {
return NS_OK;
}
nsCOMPtr<nsIPresShell> shell = aPresContext->GetPresShell();
if (!shell) {
return NS_OK;
}
if (aFullDispatch) {
return shell->HandleEventWithTarget(aEvent, nullptr, aTarget, aStatus);
}
return shell->HandleDOMEventWithTarget(aTarget, aEvent, aStatus);
}
/* static */
nsresult
Element::DispatchClickEvent(nsPresContext* aPresContext,
nsInputEvent* aSourceEvent,
nsIContent* aTarget,
bool aFullDispatch,
const widget::EventFlags* aExtraEventFlags,
nsEventStatus* aStatus)
{
NS_PRECONDITION(aTarget, "Must have target");
NS_PRECONDITION(aSourceEvent, "Must have source event");
NS_PRECONDITION(aStatus, "Null out param?");
nsMouseEvent event(aSourceEvent->mFlags.mIsTrusted, NS_MOUSE_CLICK,
aSourceEvent->widget, nsMouseEvent::eReal);
event.refPoint = aSourceEvent->refPoint;
uint32_t clickCount = 1;
float pressure = 0;
uint16_t inputSource = 0;
if (aSourceEvent->eventStructType == NS_MOUSE_EVENT) {
clickCount = static_cast<nsMouseEvent*>(aSourceEvent)->clickCount;
pressure = static_cast<nsMouseEvent*>(aSourceEvent)->pressure;
inputSource = static_cast<nsMouseEvent*>(aSourceEvent)->inputSource;
} else if (aSourceEvent->eventStructType == NS_KEY_EVENT) {
inputSource = nsIDOMMouseEvent::MOZ_SOURCE_KEYBOARD;
}
event.pressure = pressure;
event.clickCount = clickCount;
event.inputSource = inputSource;
event.modifiers = aSourceEvent->modifiers;
if (aExtraEventFlags) {
// Be careful not to overwrite existing flags!
event.mFlags.Union(*aExtraEventFlags);
}
return DispatchEvent(aPresContext, &event, aTarget, aFullDispatch, aStatus);
}
nsIFrame*
Element::GetPrimaryFrame(mozFlushType aType)
{
nsIDocument* doc = GetCurrentDoc();
if (!doc) {
return nullptr;
}
// Cause a flush, so we get up-to-date frame
// information
doc->FlushPendingNotifications(aType);
return GetPrimaryFrame();
}
//----------------------------------------------------------------------
nsresult
Element::LeaveLink(nsPresContext* aPresContext)
{
nsILinkHandler *handler = aPresContext->GetLinkHandler();
if (!handler) {
return NS_OK;
}
return handler->OnLeaveLink();
}
nsresult
Element::SetEventHandler(nsIAtom* aEventName,
const nsAString& aValue,
bool aDefer)
{
nsIDocument *ownerDoc = OwnerDoc();
if (ownerDoc->IsLoadedAsData()) {
// Make this a no-op rather than throwing an error to avoid
// the error causing problems setting the attribute.
return NS_OK;
}
NS_PRECONDITION(aEventName, "Must have event name!");
bool defer = true;
nsEventListenerManager* manager = GetEventListenerManagerForAttr(aEventName,
&defer);
if (!manager) {
return NS_OK;
}
defer = defer && aDefer; // only defer if everyone agrees...
manager->SetEventHandler(aEventName, aValue,
nsIProgrammingLanguage::JAVASCRIPT,
defer, !nsContentUtils::IsChromeDoc(ownerDoc));
return NS_OK;
}
//----------------------------------------------------------------------
const nsAttrName*
Element::InternalGetExistingAttrNameFromQName(const nsAString& aStr) const
{
return mAttrsAndChildren.GetExistingAttrNameFromQName(aStr);
}
bool
Element::MaybeCheckSameAttrVal(int32_t aNamespaceID,
nsIAtom* aName,
nsIAtom* aPrefix,
const nsAttrValueOrString& aValue,
bool aNotify,
nsAttrValue& aOldValue,
uint8_t* aModType,
bool* aHasListeners)
{
bool modification = false;
*aHasListeners = aNotify &&
nsContentUtils::HasMutationListeners(this,
NS_EVENT_BITS_MUTATION_ATTRMODIFIED,
this);
// If we have no listeners and aNotify is false, we are almost certainly
// coming from the content sink and will almost certainly have no previous
// value. Even if we do, setting the value is cheap when we have no
// listeners and don't plan to notify. The check for aNotify here is an
// optimization, the check for *aHasListeners is a correctness issue.
if (*aHasListeners || aNotify) {
nsAttrInfo info(GetAttrInfo(aNamespaceID, aName));
if (info.mValue) {
// Check whether the old value is the same as the new one. Note that we
// only need to actually _get_ the old value if we have listeners.
if (*aHasListeners) {
// Need to store the old value.
//
// If the current attribute value contains a pointer to some other data
// structure that gets updated in the process of setting the attribute
// we'll no longer have the old value of the attribute. Therefore, we
// should serialize the attribute value now to keep a snapshot.
//
// We have to serialize the value anyway in order to create the
// mutation event so there's no cost in doing it now.
aOldValue.SetToSerialized(*info.mValue);
}
bool valueMatches = aValue.EqualsAsStrings(*info.mValue);
if (valueMatches && aPrefix == info.mName->GetPrefix()) {
return true;
}
modification = true;
}
}
*aModType = modification ?
static_cast<uint8_t>(nsIDOMMutationEvent::MODIFICATION) :
static_cast<uint8_t>(nsIDOMMutationEvent::ADDITION);
return false;
}
bool
Element::OnlyNotifySameValueSet(int32_t aNamespaceID, nsIAtom* aName,
nsIAtom* aPrefix,
const nsAttrValueOrString& aValue,
bool aNotify, nsAttrValue& aOldValue,
uint8_t* aModType, bool* aHasListeners)
{
if (!MaybeCheckSameAttrVal(aNamespaceID, aName, aPrefix, aValue, aNotify,
aOldValue, aModType, aHasListeners)) {
return false;
}
nsAutoScriptBlocker scriptBlocker;
nsNodeUtils::AttributeSetToCurrentValue(this, aNamespaceID, aName);
return true;
}
nsresult
Element::SetAttr(int32_t aNamespaceID, nsIAtom* aName,
nsIAtom* aPrefix, const nsAString& aValue,
bool aNotify)
{
// Keep this in sync with SetParsedAttr below
NS_ENSURE_ARG_POINTER(aName);
NS_ASSERTION(aNamespaceID != kNameSpaceID_Unknown,
"Don't call SetAttr with unknown namespace");
if (!mAttrsAndChildren.CanFitMoreAttrs()) {
return NS_ERROR_FAILURE;
}
uint8_t modType;
bool hasListeners;
nsAttrValueOrString value(aValue);
nsAttrValue oldValue;
if (OnlyNotifySameValueSet(aNamespaceID, aName, aPrefix, value, aNotify,
oldValue, &modType, &hasListeners)) {
return NS_OK;
}
nsresult rv = BeforeSetAttr(aNamespaceID, aName, &value, aNotify);
NS_ENSURE_SUCCESS(rv, rv);
if (aNotify) {
nsNodeUtils::AttributeWillChange(this, aNamespaceID, aName, modType);
}
// Hold a script blocker while calling ParseAttribute since that can call
// out to id-observers
nsAutoScriptBlocker scriptBlocker;
nsAttrValue attrValue;
if (!ParseAttribute(aNamespaceID, aName, aValue, attrValue)) {
attrValue.SetTo(aValue);
}
return SetAttrAndNotify(aNamespaceID, aName, aPrefix, oldValue,
attrValue, modType, hasListeners, aNotify,
kCallAfterSetAttr);
}
nsresult
Element::SetParsedAttr(int32_t aNamespaceID, nsIAtom* aName,
nsIAtom* aPrefix, nsAttrValue& aParsedValue,
bool aNotify)
{
// Keep this in sync with SetAttr above
NS_ENSURE_ARG_POINTER(aName);
NS_ASSERTION(aNamespaceID != kNameSpaceID_Unknown,
"Don't call SetAttr with unknown namespace");
if (!mAttrsAndChildren.CanFitMoreAttrs()) {
return NS_ERROR_FAILURE;
}
uint8_t modType;
bool hasListeners;
nsAttrValueOrString value(aParsedValue);
nsAttrValue oldValue;
if (OnlyNotifySameValueSet(aNamespaceID, aName, aPrefix, value, aNotify,
oldValue, &modType, &hasListeners)) {
return NS_OK;
}
nsresult rv = BeforeSetAttr(aNamespaceID, aName, &value, aNotify);
NS_ENSURE_SUCCESS(rv, rv);
if (aNotify) {
nsNodeUtils::AttributeWillChange(this, aNamespaceID, aName, modType);
}
return SetAttrAndNotify(aNamespaceID, aName, aPrefix, oldValue,
aParsedValue, modType, hasListeners, aNotify,
kCallAfterSetAttr);
}
nsresult
Element::SetAttrAndNotify(int32_t aNamespaceID,
nsIAtom* aName,
nsIAtom* aPrefix,
const nsAttrValue& aOldValue,
nsAttrValue& aParsedValue,
uint8_t aModType,
bool aFireMutation,
bool aNotify,
bool aCallAfterSetAttr)
{
nsresult rv;
nsIDocument* document = GetCurrentDoc();
mozAutoDocUpdate updateBatch(document, UPDATE_CONTENT_MODEL, aNotify);
nsMutationGuard::DidMutate();
// Copy aParsedValue for later use since it will be lost when we call
// SetAndTakeMappedAttr below
nsAttrValue aValueForAfterSetAttr;
if (aCallAfterSetAttr) {
aValueForAfterSetAttr.SetTo(aParsedValue);
}
bool hadValidDir = false;
bool hadDirAuto = false;
if (aNamespaceID == kNameSpaceID_None) {
if (aName == nsGkAtoms::dir) {
hadValidDir = HasValidDir() || IsHTML(nsGkAtoms::bdi);
hadDirAuto = HasDirAuto(); // already takes bdi into account
}
// XXXbz Perhaps we should push up the attribute mapping function
// stuff to Element?
if (!IsAttributeMapped(aName) ||
!SetMappedAttribute(document, aName, aParsedValue, &rv)) {
rv = mAttrsAndChildren.SetAndTakeAttr(aName, aParsedValue);
}
}
else {
nsCOMPtr<nsINodeInfo> ni;
ni = mNodeInfo->NodeInfoManager()->GetNodeInfo(aName, aPrefix,
aNamespaceID,
nsIDOMNode::ATTRIBUTE_NODE);
rv = mAttrsAndChildren.SetAndTakeAttr(ni, aParsedValue);
}
NS_ENSURE_SUCCESS(rv, rv);
if (document || HasFlag(NODE_FORCE_XBL_BINDINGS)) {
nsRefPtr<nsXBLBinding> binding =
OwnerDoc()->BindingManager()->GetBinding(this);
if (binding) {
binding->AttributeChanged(aName, aNamespaceID, false, aNotify);
}
}
UpdateState(aNotify);
if (aNotify) {
nsNodeUtils::AttributeChanged(this, aNamespaceID, aName, aModType);
}
if (aCallAfterSetAttr) {
rv = AfterSetAttr(aNamespaceID, aName, &aValueForAfterSetAttr, aNotify);
NS_ENSURE_SUCCESS(rv, rv);
if (aNamespaceID == kNameSpaceID_None && aName == nsGkAtoms::dir) {
OnSetDirAttr(this, &aValueForAfterSetAttr,
hadValidDir, hadDirAuto, aNotify);
}
}
if (aFireMutation) {
nsMutationEvent mutation(true, NS_MUTATION_ATTRMODIFIED);
nsAutoString ns;
nsContentUtils::NameSpaceManager()->GetNameSpaceURI(aNamespaceID, ns);
Attr* attrNode =
GetAttributeNodeNSInternal(ns, nsDependentAtomString(aName));
mutation.mRelatedNode = attrNode;
mutation.mAttrName = aName;
nsAutoString newValue;
GetAttr(aNamespaceID, aName, newValue);
if (!newValue.IsEmpty()) {
mutation.mNewAttrValue = do_GetAtom(newValue);
}
if (!aOldValue.IsEmptyString()) {
mutation.mPrevAttrValue = aOldValue.GetAsAtom();
}
mutation.mAttrChange = aModType;
mozAutoSubtreeModified subtree(OwnerDoc(), this);
(new nsAsyncDOMEvent(this, mutation))->RunDOMEventWhenSafe();
}
return NS_OK;
}
bool
Element::ParseAttribute(int32_t aNamespaceID,
nsIAtom* aAttribute,
const nsAString& aValue,
nsAttrValue& aResult)
{
return false;
}
bool
Element::SetMappedAttribute(nsIDocument* aDocument,
nsIAtom* aName,
nsAttrValue& aValue,
nsresult* aRetval)
{
*aRetval = NS_OK;
return false;
}
nsEventListenerManager*
Element::GetEventListenerManagerForAttr(nsIAtom* aAttrName,
bool* aDefer)
{
*aDefer = true;
return GetListenerManager(true);
}
Element::nsAttrInfo
Element::GetAttrInfo(int32_t aNamespaceID, nsIAtom* aName) const
{
NS_ASSERTION(nullptr != aName, "must have attribute name");
NS_ASSERTION(aNamespaceID != kNameSpaceID_Unknown,
"must have a real namespace ID!");
int32_t index = mAttrsAndChildren.IndexOfAttr(aName, aNamespaceID);
if (index >= 0) {
return nsAttrInfo(mAttrsAndChildren.AttrNameAt(index),
mAttrsAndChildren.AttrAt(index));
}
return nsAttrInfo(nullptr, nullptr);
}
bool
Element::GetAttr(int32_t aNameSpaceID, nsIAtom* aName,
nsAString& aResult) const
{
DOMString str;
bool haveAttr = GetAttr(aNameSpaceID, aName, str);
str.ToString(aResult);
return haveAttr;
}
int32_t
Element::FindAttrValueIn(int32_t aNameSpaceID,
nsIAtom* aName,
AttrValuesArray* aValues,
nsCaseTreatment aCaseSensitive) const
{
NS_ASSERTION(aName, "Must have attr name");
NS_ASSERTION(aNameSpaceID != kNameSpaceID_Unknown, "Must have namespace");
NS_ASSERTION(aValues, "Null value array");
const nsAttrValue* val = mAttrsAndChildren.GetAttr(aName, aNameSpaceID);
if (val) {
for (int32_t i = 0; aValues[i]; ++i) {
if (val->Equals(*aValues[i], aCaseSensitive)) {
return i;
}
}
return ATTR_VALUE_NO_MATCH;
}
return ATTR_MISSING;
}
nsresult
Element::UnsetAttr(int32_t aNameSpaceID, nsIAtom* aName,
bool aNotify)
{
NS_ASSERTION(nullptr != aName, "must have attribute name");
int32_t index = mAttrsAndChildren.IndexOfAttr(aName, aNameSpaceID);
if (index < 0) {
return NS_OK;
}
nsresult rv = BeforeSetAttr(aNameSpaceID, aName, nullptr, aNotify);
NS_ENSURE_SUCCESS(rv, rv);
nsIDocument *document = GetCurrentDoc();
mozAutoDocUpdate updateBatch(document, UPDATE_CONTENT_MODEL, aNotify);
if (aNotify) {
nsNodeUtils::AttributeWillChange(this, aNameSpaceID, aName,
nsIDOMMutationEvent::REMOVAL);
}
bool hasMutationListeners = aNotify &&
nsContentUtils::HasMutationListeners(this,
NS_EVENT_BITS_MUTATION_ATTRMODIFIED,
this);
// Grab the attr node if needed before we remove it from the attr map
nsRefPtr<Attr> attrNode;
if (hasMutationListeners) {
nsAutoString ns;
nsContentUtils::NameSpaceManager()->GetNameSpaceURI(aNameSpaceID, ns);
attrNode = GetAttributeNodeNSInternal(ns, nsDependentAtomString(aName));
}
// Clear binding to nsIDOMMozNamedAttrMap
nsDOMSlots *slots = GetExistingDOMSlots();
if (slots && slots->mAttributeMap) {
slots->mAttributeMap->DropAttribute(aNameSpaceID, aName);
}
// The id-handling code, and in the future possibly other code, need to
// react to unexpected attribute changes.
nsMutationGuard::DidMutate();
bool hadValidDir = false;
bool hadDirAuto = false;
if (aNameSpaceID == kNameSpaceID_None && aName == nsGkAtoms::dir) {
hadValidDir = HasValidDir() || IsHTML(nsGkAtoms::bdi);
hadDirAuto = HasDirAuto(); // already takes bdi into account
}
nsAttrValue oldValue;
rv = mAttrsAndChildren.RemoveAttrAt(index, oldValue);
NS_ENSURE_SUCCESS(rv, rv);
if (document || HasFlag(NODE_FORCE_XBL_BINDINGS)) {
nsRefPtr<nsXBLBinding> binding =
OwnerDoc()->BindingManager()->GetBinding(this);
if (binding) {
binding->AttributeChanged(aName, aNameSpaceID, true, aNotify);
}
}
UpdateState(aNotify);
if (aNotify) {
nsNodeUtils::AttributeChanged(this, aNameSpaceID, aName,
nsIDOMMutationEvent::REMOVAL);
}
rv = AfterSetAttr(aNameSpaceID, aName, nullptr, aNotify);
NS_ENSURE_SUCCESS(rv, rv);
if (aNameSpaceID == kNameSpaceID_None && aName == nsGkAtoms::dir) {
OnSetDirAttr(this, nullptr, hadValidDir, hadDirAuto, aNotify);
}
if (hasMutationListeners) {
nsMutationEvent mutation(true, NS_MUTATION_ATTRMODIFIED);
mutation.mRelatedNode = attrNode;
mutation.mAttrName = aName;
nsAutoString value;
oldValue.ToString(value);
if (!value.IsEmpty())
mutation.mPrevAttrValue = do_GetAtom(value);
mutation.mAttrChange = nsIDOMMutationEvent::REMOVAL;
mozAutoSubtreeModified subtree(OwnerDoc(), this);
(new nsAsyncDOMEvent(this, mutation))->RunDOMEventWhenSafe();
}
return NS_OK;
}
const nsAttrName*
Element::GetAttrNameAt(uint32_t aIndex) const
{
return mAttrsAndChildren.GetSafeAttrNameAt(aIndex);
}
uint32_t
Element::GetAttrCount() const
{
return mAttrsAndChildren.AttrCount();
}
#ifdef DEBUG
void
Element::ListAttributes(FILE* out) const
{
uint32_t index, count = mAttrsAndChildren.AttrCount();
for (index = 0; index < count; index++) {
nsAutoString buffer;
// name
mAttrsAndChildren.AttrNameAt(index)->GetQualifiedName(buffer);
// value
buffer.AppendLiteral("=\"");
nsAutoString value;
mAttrsAndChildren.AttrAt(index)->ToString(value);
for (int i = value.Length(); i >= 0; --i) {
if (value[i] == PRUnichar('"'))
value.Insert(PRUnichar('\\'), uint32_t(i));
}
buffer.Append(value);
buffer.AppendLiteral("\"");
fputs(" ", out);
fputs(NS_LossyConvertUTF16toASCII(buffer).get(), out);
}
}
void
Element::List(FILE* out, int32_t aIndent,
const nsCString& aPrefix) const
{
int32_t indent;
for (indent = aIndent; --indent >= 0; ) fputs(" ", out);
fputs(aPrefix.get(), out);
fputs(NS_LossyConvertUTF16toASCII(mNodeInfo->QualifiedName()).get(), out);
fprintf(out, "@%p", (void *)this);
ListAttributes(out);
fprintf(out, " state=[%llx]", State().GetInternalValue());
fprintf(out, " flags=[%08x]", static_cast<unsigned int>(GetFlags()));
if (IsCommonAncestorForRangeInSelection()) {
nsRange::RangeHashTable* ranges =
static_cast<nsRange::RangeHashTable*>(GetProperty(nsGkAtoms::range));
fprintf(out, " ranges:%d", ranges ? ranges->Count() : 0);
}
fprintf(out, " primaryframe=%p", static_cast<void*>(GetPrimaryFrame()));
fprintf(out, " refcount=%d<", mRefCnt.get());
nsIContent* child = GetFirstChild();
if (child) {
fputs("\n", out);
for (; child; child = child->GetNextSibling()) {
child->List(out, aIndent + 1);
}
for (indent = aIndent; --indent >= 0; ) fputs(" ", out);
}
fputs(">\n", out);
Element* nonConstThis = const_cast<Element*>(this);
// XXX sXBL/XBL2 issue! Owner or current document?
nsIDocument *document = OwnerDoc();
// Note: not listing nsIAnonymousContentCreator-created content...
nsBindingManager* bindingManager = document->BindingManager();
nsCOMPtr<nsIDOMNodeList> anonymousChildren;
bindingManager->GetAnonymousNodesFor(nonConstThis,
getter_AddRefs(anonymousChildren));
if (anonymousChildren) {
uint32_t length;
anonymousChildren->GetLength(&length);
if (length > 0) {
for (indent = aIndent; --indent >= 0; ) fputs(" ", out);
fputs("anonymous-children<\n", out);
for (uint32_t i = 0; i < length; ++i) {
nsCOMPtr<nsIDOMNode> node;
anonymousChildren->Item(i, getter_AddRefs(node));
nsCOMPtr<nsIContent> child = do_QueryInterface(node);
child->List(out, aIndent + 1);
}
for (indent = aIndent; --indent >= 0; ) fputs(" ", out);
fputs(">\n", out);
}
}
if (bindingManager->HasContentListFor(nonConstThis)) {
nsCOMPtr<nsIDOMNodeList> contentList;
bindingManager->GetContentListFor(nonConstThis,
getter_AddRefs(contentList));
NS_ASSERTION(contentList != nullptr, "oops, binding manager lied");
uint32_t length;
contentList->GetLength(&length);
if (length > 0) {
for (indent = aIndent; --indent >= 0; ) fputs(" ", out);
fputs("content-list<\n", out);
for (uint32_t i = 0; i < length; ++i) {
nsCOMPtr<nsIDOMNode> node;
contentList->Item(i, getter_AddRefs(node));
nsCOMPtr<nsIContent> child = do_QueryInterface(node);
child->List(out, aIndent + 1);
}
for (indent = aIndent; --indent >= 0; ) fputs(" ", out);
fputs(">\n", out);
}
}
}
void
Element::DumpContent(FILE* out, int32_t aIndent,
bool aDumpAll) const
{
int32_t indent;
for (indent = aIndent; --indent >= 0; ) fputs(" ", out);
const nsString& buf = mNodeInfo->QualifiedName();
fputs("<", out);
fputs(NS_LossyConvertUTF16toASCII(buf).get(), out);
if(aDumpAll) ListAttributes(out);
fputs(">", out);
if(aIndent) fputs("\n", out);
for (nsIContent* child = GetFirstChild();
child;
child = child->GetNextSibling()) {
int32_t indent = aIndent ? aIndent + 1 : 0;
child->DumpContent(out, indent, aDumpAll);
}
for (indent = aIndent; --indent >= 0; ) fputs(" ", out);
fputs("</", out);
fputs(NS_LossyConvertUTF16toASCII(buf).get(), out);
fputs(">", out);
if(aIndent) fputs("\n", out);
}
#endif
bool
Element::CheckHandleEventForLinksPrecondition(nsEventChainVisitor& aVisitor,
nsIURI** aURI) const
{
if (aVisitor.mEventStatus == nsEventStatus_eConsumeNoDefault ||
(!aVisitor.mEvent->mFlags.mIsTrusted &&
(aVisitor.mEvent->message != NS_MOUSE_CLICK) &&
(aVisitor.mEvent->message != NS_KEY_PRESS) &&
(aVisitor.mEvent->message != NS_UI_ACTIVATE)) ||
!aVisitor.mPresContext ||
aVisitor.mEvent->mFlags.mMultipleActionsPrevented) {
return false;
}
// Make sure we actually are a link
return IsLink(aURI);
}
nsresult
Element::PreHandleEventForLinks(nsEventChainPreVisitor& aVisitor)
{
// Optimisation: return early if this event doesn't interest us.
// IMPORTANT: this switch and the switch below it must be kept in sync!
switch (aVisitor.mEvent->message) {
case NS_MOUSE_ENTER_SYNTH:
case NS_FOCUS_CONTENT:
case NS_MOUSE_EXIT_SYNTH:
case NS_BLUR_CONTENT:
break;
default:
return NS_OK;
}
// Make sure we meet the preconditions before continuing
nsCOMPtr<nsIURI> absURI;
if (!CheckHandleEventForLinksPrecondition(aVisitor, getter_AddRefs(absURI))) {
return NS_OK;
}
nsresult rv = NS_OK;
// We do the status bar updates in PreHandleEvent so that the status bar gets
// updated even if the event is consumed before we have a chance to set it.
switch (aVisitor.mEvent->message) {
// Set the status bar similarly for mouseover and focus
case NS_MOUSE_ENTER_SYNTH:
aVisitor.mEventStatus = nsEventStatus_eConsumeNoDefault;
// FALL THROUGH
case NS_FOCUS_CONTENT:
if (aVisitor.mEvent->eventStructType != NS_FOCUS_EVENT ||
!static_cast<nsFocusEvent*>(aVisitor.mEvent)->isRefocus) {
nsAutoString target;
GetLinkTarget(target);
nsContentUtils::TriggerLink(this, aVisitor.mPresContext, absURI, target,
false, true, true);
// Make sure any ancestor links don't also TriggerLink
aVisitor.mEvent->mFlags.mMultipleActionsPrevented = true;
}
break;
case NS_MOUSE_EXIT_SYNTH:
aVisitor.mEventStatus = nsEventStatus_eConsumeNoDefault;
// FALL THROUGH
case NS_BLUR_CONTENT:
rv = LeaveLink(aVisitor.mPresContext);
if (NS_SUCCEEDED(rv)) {
aVisitor.mEvent->mFlags.mMultipleActionsPrevented = true;
}
break;
default:
// switch not in sync with the optimization switch earlier in this function
NS_NOTREACHED("switch statements not in sync");
return NS_ERROR_UNEXPECTED;
}
return rv;
}
nsresult
Element::PostHandleEventForLinks(nsEventChainPostVisitor& aVisitor)
{
// Optimisation: return early if this event doesn't interest us.
// IMPORTANT: this switch and the switch below it must be kept in sync!
switch (aVisitor.mEvent->message) {
case NS_MOUSE_BUTTON_DOWN:
case NS_MOUSE_CLICK:
case NS_UI_ACTIVATE:
case NS_KEY_PRESS:
break;
default:
return NS_OK;
}
// Make sure we meet the preconditions before continuing
nsCOMPtr<nsIURI> absURI;
if (!CheckHandleEventForLinksPrecondition(aVisitor, getter_AddRefs(absURI))) {
return NS_OK;
}
nsresult rv = NS_OK;
switch (aVisitor.mEvent->message) {
case NS_MOUSE_BUTTON_DOWN:
{
if (aVisitor.mEvent->eventStructType == NS_MOUSE_EVENT &&
static_cast<nsMouseEvent*>(aVisitor.mEvent)->button ==
nsMouseEvent::eLeftButton) {
// don't make the link grab the focus if there is no link handler
nsILinkHandler *handler = aVisitor.mPresContext->GetLinkHandler();
nsIDocument *document = GetCurrentDoc();
if (handler && document) {
nsIFocusManager* fm = nsFocusManager::GetFocusManager();
if (fm) {
aVisitor.mEvent->mFlags.mMultipleActionsPrevented = true;
nsCOMPtr<nsIDOMElement> elem = do_QueryInterface(this);
fm->SetFocus(elem, nsIFocusManager::FLAG_BYMOUSE |
nsIFocusManager::FLAG_NOSCROLL);
}
nsEventStateManager::SetActiveManager(
aVisitor.mPresContext->EventStateManager(), this);
}
}
}
break;
case NS_MOUSE_CLICK:
if (NS_IS_MOUSE_LEFT_CLICK(aVisitor.mEvent)) {
nsInputEvent* inputEvent = static_cast<nsInputEvent*>(aVisitor.mEvent);
if (inputEvent->IsControl() || inputEvent->IsMeta() ||
inputEvent->IsAlt() ||inputEvent->IsShift()) {
break;
}
// The default action is simply to dispatch DOMActivate
nsCOMPtr<nsIPresShell> shell = aVisitor.mPresContext->GetPresShell();
if (shell) {
// single-click
nsEventStatus status = nsEventStatus_eIgnore;
nsUIEvent actEvent(aVisitor.mEvent->mFlags.mIsTrusted,
NS_UI_ACTIVATE, 1);
rv = shell->HandleDOMEventWithTarget(this, &actEvent, &status);
if (NS_SUCCEEDED(rv)) {
aVisitor.mEventStatus = nsEventStatus_eConsumeNoDefault;
}
}
}
break;
case NS_UI_ACTIVATE:
{
if (aVisitor.mEvent->originalTarget == this) {
nsAutoString target;
GetLinkTarget(target);
nsContentUtils::TriggerLink(this, aVisitor.mPresContext, absURI, target,
true, true,
aVisitor.mEvent->mFlags.mIsTrusted);
aVisitor.mEventStatus = nsEventStatus_eConsumeNoDefault;
}
}
break;
case NS_KEY_PRESS:
{
if (aVisitor.mEvent->eventStructType == NS_KEY_EVENT) {
nsKeyEvent* keyEvent = static_cast<nsKeyEvent*>(aVisitor.mEvent);
if (keyEvent->keyCode == NS_VK_RETURN) {
nsEventStatus status = nsEventStatus_eIgnore;
rv = DispatchClickEvent(aVisitor.mPresContext, keyEvent, this,
false, nullptr, &status);
if (NS_SUCCEEDED(rv)) {
aVisitor.mEventStatus = nsEventStatus_eConsumeNoDefault;
}
}
}
}
break;
default:
// switch not in sync with the optimization switch earlier in this function
NS_NOTREACHED("switch statements not in sync");
return NS_ERROR_UNEXPECTED;
}
return rv;
}
void
Element::GetLinkTarget(nsAString& aTarget)
{
aTarget.Truncate();
}
// NOTE: The aPresContext pointer is NOT addrefed.
// *aSelectorList might be null even if NS_OK is returned; this
// happens when all the selectors were pseudo-element selectors.
static nsresult
ParseSelectorList(nsINode* aNode,
const nsAString& aSelectorString,
nsCSSSelectorList** aSelectorList)
{
NS_ENSURE_ARG(aNode);
nsIDocument* doc = aNode->OwnerDoc();
nsCSSParser parser(doc->CSSLoader());
nsCSSSelectorList* selectorList;
nsresult rv = parser.ParseSelectorString(aSelectorString,
doc->GetDocumentURI(),
0, // XXXbz get the line number!
&selectorList);
if (NS_FAILED(rv)) {
// We hit this for syntax errors, which are quite common, so don't
// use NS_ENSURE_SUCCESS. (For example, jQuery has an extended set
// of selectors, but it sees if we can parse them first.)
return rv;
}
// Filter out pseudo-element selectors from selectorList
nsCSSSelectorList** slot = &selectorList;
do {
nsCSSSelectorList* cur = *slot;
if (cur->mSelectors->IsPseudoElement()) {
*slot = cur->mNext;
cur->mNext = nullptr;
delete cur;
} else {
slot = &cur->mNext;
}
} while (*slot);
*aSelectorList = selectorList;
return NS_OK;
}
bool
Element::MozMatchesSelector(const nsAString& aSelector,
ErrorResult& aError)
{
nsAutoPtr<nsCSSSelectorList> selectorList;
aError = ParseSelectorList(this, aSelector, getter_Transfers(selectorList));
if (aError.Failed()) {
return false;
}
OwnerDoc()->FlushPendingLinkUpdates();
TreeMatchContext matchingContext(false,
nsRuleWalker::eRelevantLinkUnvisited,
OwnerDoc(),
TreeMatchContext::eNeverMatchVisited);
matchingContext.SetHasSpecifiedScope();
matchingContext.AddScopeElement(this);
return nsCSSRuleProcessor::SelectorListMatches(this, matchingContext,
selectorList);
}
static const nsAttrValue::EnumTable kCORSAttributeTable[] = {
// Order matters here
// See ParseCORSValue
{ "anonymous", CORS_ANONYMOUS },
{ "use-credentials", CORS_USE_CREDENTIALS },
{ 0 }
};
/* static */ void
Element::ParseCORSValue(const nsAString& aValue,
nsAttrValue& aResult)
{
DebugOnly<bool> success =
aResult.ParseEnumValue(aValue, kCORSAttributeTable, false,
// default value is anonymous if aValue is
// not a value we understand
&kCORSAttributeTable[0]);
MOZ_ASSERT(success);
}
/* static */ CORSMode
Element::StringToCORSMode(const nsAString& aValue)
{
if (aValue.IsVoid()) {
return CORS_NONE;
}
nsAttrValue val;
Element::ParseCORSValue(aValue, val);
return CORSMode(val.GetEnumValue());
}
/* static */ CORSMode
Element::AttrValueToCORSMode(const nsAttrValue* aValue)
{
if (!aValue) {
return CORS_NONE;
}
return CORSMode(aValue->GetEnumValue());
}
static const char*
GetFullScreenError(nsIDocument* aDoc)
{
// Block fullscreen requests in the chrome document when the fullscreen API
// is configured for content only.
if (nsContentUtils::IsFullscreenApiContentOnly() &&
nsContentUtils::IsChromeDoc(aDoc)) {
return "FullScreenDeniedContentOnly";
}
nsCOMPtr<nsPIDOMWindow> win = aDoc->GetWindow();
if (aDoc->NodePrincipal()->GetAppStatus() >= nsIPrincipal::APP_STATUS_INSTALLED) {
// Request is in a web app and in the same origin as the web app.
// Don't enforce as strict security checks for web apps, the user
// is supposed to have trust in them. However documents cross-origin
// to the web app must still confirm to the normal security checks.
return nullptr;
}
if (!nsContentUtils::IsRequestFullScreenAllowed()) {
return "FullScreenDeniedNotInputDriven";
}
if (nsContentUtils::IsSitePermDeny(aDoc->NodePrincipal(), "fullscreen")) {
return "FullScreenDeniedBlocked";
}
return nullptr;
}
void
Element::MozRequestFullScreen()
{
// Only grant full-screen requests if this is called from inside a trusted
// event handler (i.e. inside an event handler for a user initiated event).
// This stops the full-screen from being abused similar to the popups of old,
// and it also makes it harder for bad guys' script to go full-screen and
// spoof the browser chrome/window and phish logins etc.
// Note that requests for fullscreen inside a web app's origin are exempt
// from this restriction.
const char* error = GetFullScreenError(OwnerDoc());
if (error) {
nsContentUtils::ReportToConsole(nsIScriptError::warningFlag,
"DOM", OwnerDoc(),
nsContentUtils::eDOM_PROPERTIES,
error);
nsRefPtr<nsAsyncDOMEvent> e =
new nsAsyncDOMEvent(OwnerDoc(),
NS_LITERAL_STRING("mozfullscreenerror"),
true,
false);
e->PostDOMEvent();
return;
}
OwnerDoc()->AsyncRequestFullScreen(this);
return;
}
// Try to keep the size of StringBuilder close to a jemalloc bucket size.
#define STRING_BUFFER_UNITS 1020
class StringBuilder
{
private:
class Unit
{
public:
Unit() : mAtom(nullptr), mType(eUnknown), mLength(0)
{
MOZ_COUNT_CTOR(StringBuilder::Unit);
}
~Unit()
{
if (mType == eString || mType == eStringWithEncode) {
delete mString;
}
MOZ_COUNT_DTOR(StringBuilder::Unit);
}
enum Type
{
eUnknown,
eAtom,
eString,
eStringWithEncode,
eLiteral,
eTextFragment,
eTextFragmentWithEncode,
};
union
{
nsIAtom* mAtom;
const char* mLiteral;
nsAutoString* mString;
const nsTextFragment* mTextFragment;
};
Type mType;
uint32_t mLength;
};
public:
StringBuilder() : mLast(this), mLength(0)
{
MOZ_COUNT_CTOR(StringBuilder);
}
~StringBuilder()
{
MOZ_COUNT_DTOR(StringBuilder);
}
void Append(nsIAtom* aAtom)
{
Unit* u = AddUnit();
u->mAtom = aAtom;
u->mType = Unit::eAtom;
uint32_t len = aAtom->GetLength();
u->mLength = len;
mLength += len;
}
template<int N>
void Append(const char (&aLiteral)[N])
{
Unit* u = AddUnit();
u->mLiteral = aLiteral;
u->mType = Unit::eLiteral;
uint32_t len = N - 1;
u->mLength = len;
mLength += len;
}
template<int N>
void Append(char (&aLiteral)[N])
{
Unit* u = AddUnit();
u->mLiteral = aLiteral;
u->mType = Unit::eLiteral;
uint32_t len = N - 1;
u->mLength = len;
mLength += len;
}
void Append(const nsAString& aString)
{
Unit* u = AddUnit();
u->mString = new nsAutoString(aString);
u->mType = Unit::eString;
uint32_t len = aString.Length();
u->mLength = len;
mLength += len;
}
void Append(nsAutoString* aString)
{
Unit* u = AddUnit();
u->mString = aString;
u->mType = Unit::eString;
uint32_t len = aString->Length();
u->mLength = len;
mLength += len;
}
void AppendWithAttrEncode(nsAutoString* aString, uint32_t aLen)
{
Unit* u = AddUnit();
u->mString = aString;
u->mType = Unit::eStringWithEncode;
u->mLength = aLen;
mLength += aLen;
}
void Append(const nsTextFragment* aTextFragment)
{
Unit* u = AddUnit();
u->mTextFragment = aTextFragment;
u->mType = Unit::eTextFragment;
uint32_t len = aTextFragment->GetLength();
u->mLength = len;
mLength += len;
}
void AppendWithEncode(const nsTextFragment* aTextFragment, uint32_t aLen)
{
Unit* u = AddUnit();
u->mTextFragment = aTextFragment;
u->mType = Unit::eTextFragmentWithEncode;
u->mLength = aLen;
mLength += aLen;
}
bool ToString(nsAString& aOut)
{
if (!aOut.SetCapacity(mLength, fallible_t())) {
return false;
}
for (StringBuilder* current = this; current; current = current->mNext) {
uint32_t len = current->mUnits.Length();
for (uint32_t i = 0; i < len; ++i) {
Unit& u = current->mUnits[i];
switch (u.mType) {
case Unit::eAtom:
aOut.Append(nsDependentAtomString(u.mAtom));
break;
case Unit::eString:
aOut.Append(*(u.mString));
break;
case Unit::eStringWithEncode:
EncodeAttrString(*(u.mString), aOut);
break;
case Unit::eLiteral:
aOut.AppendASCII(u.mLiteral, u.mLength);
break;
case Unit::eTextFragment:
u.mTextFragment->AppendTo(aOut);
break;
case Unit::eTextFragmentWithEncode:
EncodeTextFragment(u.mTextFragment, aOut);
break;
default:
MOZ_NOT_REACHED("Unknown unit type?");
}
}
}
return true;
}
private:
Unit* AddUnit()
{
if (mLast->mUnits.Length() == STRING_BUFFER_UNITS) {
new StringBuilder(this);
}
return mLast->mUnits.AppendElement();
}
StringBuilder(StringBuilder* aFirst)
: mLast(nullptr), mLength(0)
{
MOZ_COUNT_CTOR(StringBuilder);
aFirst->mLast->mNext = this;
aFirst->mLast = this;
}
void EncodeAttrString(const nsAutoString& aValue, nsAString& aOut)
{
const PRUnichar* c = aValue.BeginReading();
const PRUnichar* end = aValue.EndReading();
while (c < end) {
switch (*c) {
case '"':
aOut.AppendLiteral("&quot;");
break;
case '&':
aOut.AppendLiteral("&amp;");
break;
case 0x00A0:
aOut.AppendLiteral("&nbsp;");
break;
default:
aOut.Append(*c);
break;
}
++c;
}
}
void EncodeTextFragment(const nsTextFragment* aValue, nsAString& aOut)
{
uint32_t len = aValue->GetLength();
if (aValue->Is2b()) {
const PRUnichar* data = aValue->Get2b();
for (uint32_t i = 0; i < len; ++i) {
const PRUnichar c = data[i];
switch (c) {
case '<':
aOut.AppendLiteral("&lt;");
break;
case '>':
aOut.AppendLiteral("&gt;");
break;
case '&':
aOut.AppendLiteral("&amp;");
break;
case 0x00A0:
aOut.AppendLiteral("&nbsp;");
break;
default:
aOut.Append(c);
break;
}
}
} else {
const char* data = aValue->Get1b();
for (uint32_t i = 0; i < len; ++i) {
const unsigned char c = data[i];
switch (c) {
case '<':
aOut.AppendLiteral("&lt;");
break;
case '>':
aOut.AppendLiteral("&gt;");
break;
case '&':
aOut.AppendLiteral("&amp;");
break;
case 0x00A0:
aOut.AppendLiteral("&nbsp;");
break;
default:
aOut.Append(c);
break;
}
}
}
}
nsAutoTArray<Unit, STRING_BUFFER_UNITS> mUnits;
nsAutoPtr<StringBuilder> mNext;
StringBuilder* mLast;
// mLength is used only in the first StringBuilder object in the linked list.
uint32_t mLength;
};
static void
AppendEncodedCharacters(const nsTextFragment* aText, StringBuilder& aBuilder)
{
uint32_t extraSpaceNeeded = 0;
uint32_t len = aText->GetLength();
if (aText->Is2b()) {
const PRUnichar* data = aText->Get2b();
for (uint32_t i = 0; i < len; ++i) {
const PRUnichar c = data[i];
switch (c) {
case '<':
extraSpaceNeeded += ArrayLength("&lt;") - 2;
break;
case '>':
extraSpaceNeeded += ArrayLength("&gt;") - 2;
break;
case '&':
extraSpaceNeeded += ArrayLength("&amp;") - 2;
break;
case 0x00A0:
extraSpaceNeeded += ArrayLength("&nbsp;") - 2;
break;
default:
break;
}
}
} else {
const char* data = aText->Get1b();
for (uint32_t i = 0; i < len; ++i) {
const unsigned char c = data[i];
switch (c) {
case '<':
extraSpaceNeeded += ArrayLength("&lt;") - 2;
break;
case '>':
extraSpaceNeeded += ArrayLength("&gt;") - 2;
break;
case '&':
extraSpaceNeeded += ArrayLength("&amp;") - 2;
break;
case 0x00A0:
extraSpaceNeeded += ArrayLength("&nbsp;") - 2;
break;
default:
break;
}
}
}
if (extraSpaceNeeded) {
aBuilder.AppendWithEncode(aText, len + extraSpaceNeeded);
} else {
aBuilder.Append(aText);
}
}
static void
AppendEncodedAttributeValue(nsAutoString* aValue, StringBuilder& aBuilder)
{
const PRUnichar* c = aValue->BeginReading();
const PRUnichar* end = aValue->EndReading();
uint32_t extraSpaceNeeded = 0;
while (c < end) {
switch (*c) {
case '"':
extraSpaceNeeded += ArrayLength("&quot;") - 2;
break;
case '&':
extraSpaceNeeded += ArrayLength("&amp;") - 2;
break;
case 0x00A0:
extraSpaceNeeded += ArrayLength("&nbsp;") - 2;
break;
default:
break;
}
++c;
}
if (extraSpaceNeeded) {
aBuilder.AppendWithAttrEncode(aValue, aValue->Length() + extraSpaceNeeded);
} else {
aBuilder.Append(aValue);
}
}
static void
StartElement(Element* aContent, StringBuilder& aBuilder)
{
nsIAtom* localName = aContent->Tag();
int32_t tagNS = aContent->GetNameSpaceID();
aBuilder.Append("<");
if (aContent->IsHTML() || aContent->IsSVG() || aContent->IsMathML()) {
aBuilder.Append(localName);
} else {
aBuilder.Append(aContent->NodeName());
}
int32_t count = aContent->GetAttrCount();
for (int32_t i = count; i > 0;) {
--i;
const nsAttrName* name = aContent->GetAttrNameAt(i);
int32_t attNs = name->NamespaceID();
nsIAtom* attName = name->LocalName();
// Filter out any attribute starting with [-|_]moz
nsDependentAtomString attrNameStr(attName);
if (StringBeginsWith(attrNameStr, NS_LITERAL_STRING("_moz")) ||
StringBeginsWith(attrNameStr, NS_LITERAL_STRING("-moz"))) {
continue;
}
nsAutoString* attValue = new nsAutoString();
aContent->GetAttr(attNs, attName, *attValue);
// Filter out special case of <br type="_moz*"> used by the editor.
// Bug 16988. Yuck.
if (localName == nsGkAtoms::br && tagNS == kNameSpaceID_XHTML &&
attName == nsGkAtoms::type && attNs == kNameSpaceID_None &&
StringBeginsWith(*attValue, NS_LITERAL_STRING("_moz"))) {
delete attValue;
continue;
}
if (MOZ_LIKELY(attNs == kNameSpaceID_None) ||
(attNs == kNameSpaceID_XMLNS &&
attName == nsGkAtoms::xmlns)) {
aBuilder.Append(" ");
} else if (attNs == kNameSpaceID_XML) {
aBuilder.Append(" xml:");
} else if (attNs == kNameSpaceID_XMLNS) {
aBuilder.Append(" xmlns:");
} else if (attNs == kNameSpaceID_XLink) {
aBuilder.Append(" xlink:");
} else {
nsIAtom* prefix = name->GetPrefix();
if (prefix) {
aBuilder.Append(" ");
aBuilder.Append(prefix);
aBuilder.Append(":");
}
}
aBuilder.Append(attName);
aBuilder.Append("=\"");
AppendEncodedAttributeValue(attValue, aBuilder);
aBuilder.Append("\"");
}
aBuilder.Append(">");
/*
// Per HTML spec we should append one \n if the first child of
// pre/textarea/listing is a textnode and starts with a \n.
// But because browsers haven't traditionally had that behavior,
// we're not changing our behavior either - yet.
if (aContent->IsHTML()) {
if (localName == nsGkAtoms::pre || localName == nsGkAtoms::textarea ||
localName == nsGkAtoms::listing) {
nsIContent* fc = aContent->GetFirstChild();
if (fc &&
(fc->NodeType() == nsIDOMNode::TEXT_NODE ||
fc->NodeType() == nsIDOMNode::CDATA_SECTION_NODE)) {
const nsTextFragment* text = fc->GetText();
if (text && text->GetLength() && text->CharAt(0) == PRUnichar('\n')) {
aBuilder.Append("\n");
}
}
}
}*/
}
static inline bool
ShouldEscape(nsIContent* aParent)
{
if (!aParent || !aParent->IsHTML()) {
return true;
}
static const nsIAtom* nonEscapingElements[] = {
nsGkAtoms::style, nsGkAtoms::script, nsGkAtoms::xmp,
nsGkAtoms::iframe, nsGkAtoms::noembed, nsGkAtoms::noframes,
nsGkAtoms::plaintext,
// Per the current spec noscript should be escaped in case
// scripts are disabled or if document doesn't have
// browsing context. However the latter seems to be a spec bug
// and Gecko hasn't traditionally done the former.
nsGkAtoms::noscript
};
static mozilla::BloomFilter<12, nsIAtom> sFilter;
static bool sInitialized = false;
if (!sInitialized) {
sInitialized = true;
for (uint32_t i = 0; i < ArrayLength(nonEscapingElements); ++i) {
sFilter.add(nonEscapingElements[i]);
}
}
nsIAtom* tag = aParent->Tag();
if (sFilter.mightContain(tag)) {
for (uint32_t i = 0; i < ArrayLength(nonEscapingElements); ++i) {
if (tag == nonEscapingElements[i]) {
return false;
}
}
}
return true;
}
static inline bool
IsVoidTag(Element* aElement)
{
if (!aElement->IsHTML()) {
return false;
}
static const nsIAtom* voidElements[] = {
nsGkAtoms::area, nsGkAtoms::base, nsGkAtoms::basefont,
nsGkAtoms::bgsound, nsGkAtoms::br, nsGkAtoms::col,
nsGkAtoms::command, nsGkAtoms::embed, nsGkAtoms::frame,
nsGkAtoms::hr, nsGkAtoms::img, nsGkAtoms::input,
nsGkAtoms::keygen, nsGkAtoms::link, nsGkAtoms::meta,
nsGkAtoms::param, nsGkAtoms::source, nsGkAtoms::track,
nsGkAtoms::wbr
};
static mozilla::BloomFilter<12, nsIAtom> sFilter;
static bool sInitialized = false;
if (!sInitialized) {
sInitialized = true;
for (uint32_t i = 0; i < ArrayLength(voidElements); ++i) {
sFilter.add(voidElements[i]);
}
}
nsIAtom* tag = aElement->Tag();
if (sFilter.mightContain(tag)) {
for (uint32_t i = 0; i < ArrayLength(voidElements); ++i) {
if (tag == voidElements[i]) {
return true;
}
}
}
return false;
}
static bool
Serialize(Element* aRoot, bool aDescendentsOnly, nsAString& aOut)
{
nsINode* current = aDescendentsOnly ?
nsNodeUtils::GetFirstChildOfTemplateOrNode(aRoot) : aRoot;
if (!current) {
return true;
}
StringBuilder builder;
nsIContent* next;
while (true) {
bool isVoid = false;
switch (current->NodeType()) {
case nsIDOMNode::ELEMENT_NODE: {
Element* elem = current->AsElement();
StartElement(elem, builder);
isVoid = IsVoidTag(elem);
if (!isVoid &&
(next = nsNodeUtils::GetFirstChildOfTemplateOrNode(current))) {
current = next;
continue;
}
break;
}
case nsIDOMNode::TEXT_NODE:
case nsIDOMNode::CDATA_SECTION_NODE: {
const nsTextFragment* text = static_cast<nsIContent*>(current)->GetText();
nsIContent* parent = current->GetParent();
if (ShouldEscape(parent)) {
AppendEncodedCharacters(text, builder);
} else {
builder.Append(text);
}
break;
}
case nsIDOMNode::COMMENT_NODE: {
builder.Append("<!--");
builder.Append(static_cast<nsIContent*>(current)->GetText());
builder.Append("-->");
break;
}
case nsIDOMNode::DOCUMENT_TYPE_NODE: {
builder.Append("<!DOCTYPE ");
builder.Append(current->NodeName());
builder.Append(">");
break;
}
case nsIDOMNode::PROCESSING_INSTRUCTION_NODE: {
builder.Append("<?");
builder.Append(current->NodeName());
builder.Append(" ");
builder.Append(static_cast<nsIContent*>(current)->GetText());
builder.Append(">");
break;
}
}
while (true) {
if (!isVoid && current->NodeType() == nsIDOMNode::ELEMENT_NODE) {
builder.Append("</");
nsIContent* elem = static_cast<nsIContent*>(current);
if (elem->IsHTML() || elem->IsSVG() || elem->IsMathML()) {
builder.Append(elem->Tag());
} else {
builder.Append(current->NodeName());
}
builder.Append(">");
}
isVoid = false;
if (current == aRoot) {
return builder.ToString(aOut);
}
if ((next = current->GetNextSibling())) {
current = next;
break;
}
current = current->GetParentNode();
// Template case, if we are in a template's content, then the parent
// should be the host template element.
if (current->NodeType() == nsIDOMNode::DOCUMENT_FRAGMENT_NODE) {
DocumentFragment* frag = static_cast<DocumentFragment*>(current);
HTMLTemplateElement* fragHost = frag->GetHost();
if (fragHost) {
current = fragHost;
}
}
if (aDescendentsOnly && current == aRoot) {
return builder.ToString(aOut);
}
}
}
}
nsresult
Element::GetMarkup(bool aIncludeSelf, nsAString& aMarkup)
{
aMarkup.Truncate();
nsIDocument* doc = OwnerDoc();
if (IsInHTMLDocument()) {
return Serialize(this, !aIncludeSelf, aMarkup) ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
}
nsAutoString contentType;
doc->GetContentType(contentType);
nsCOMPtr<nsIDocumentEncoder> docEncoder = doc->GetCachedEncoder();
if (!docEncoder) {
docEncoder =
do_CreateInstance(PromiseFlatCString(
nsDependentCString(NS_DOC_ENCODER_CONTRACTID_BASE) +
NS_ConvertUTF16toUTF8(contentType)
).get());
}
if (!docEncoder) {
// This could be some type for which we create a synthetic document. Try
// again as XML
contentType.AssignLiteral("application/xml");
docEncoder = do_CreateInstance(NS_DOC_ENCODER_CONTRACTID_BASE "application/xml");
}
NS_ENSURE_TRUE(docEncoder, NS_ERROR_FAILURE);
uint32_t flags = nsIDocumentEncoder::OutputEncodeBasicEntities |
// Output DOM-standard newlines
nsIDocumentEncoder::OutputLFLineBreak |
// Don't do linebreaking that's not present in
// the source
nsIDocumentEncoder::OutputRaw |
// Only check for mozdirty when necessary (bug 599983)
nsIDocumentEncoder::OutputIgnoreMozDirty;
if (IsEditable()) {
nsIEditor* editor = GetEditorInternal();
if (editor && editor->OutputsMozDirty()) {
flags &= ~nsIDocumentEncoder::OutputIgnoreMozDirty;
}
}
nsresult rv = docEncoder->NativeInit(doc, contentType, flags);
NS_ENSURE_SUCCESS(rv, rv);
if (aIncludeSelf) {
docEncoder->SetNativeNode(this);
} else {
docEncoder->SetNativeContainerNode(this);
}
rv = docEncoder->EncodeToString(aMarkup);
if (!aIncludeSelf) {
doc->SetCachedEncoder(docEncoder.forget());
}
return rv;
}
/**
* Fire mutation events for changes caused by parsing directly into a
* context node.
*
* @param aDoc the document of the node
* @param aDest the destination node that got stuff appended to it
* @param aOldChildCount the number of children the node had before parsing
*/
static void
FireMutationEventsForDirectParsing(nsIDocument* aDoc, nsIContent* aDest,
int32_t aOldChildCount)
{
// Fire mutation events. Optimize for the case when there are no listeners
int32_t newChildCount = aDest->GetChildCount();
if (newChildCount && nsContentUtils::
HasMutationListeners(aDoc, NS_EVENT_BITS_MUTATION_NODEINSERTED)) {
nsAutoTArray<nsCOMPtr<nsIContent>, 50> childNodes;
NS_ASSERTION(newChildCount - aOldChildCount >= 0,
"What, some unexpected dom mutation has happened?");
childNodes.SetCapacity(newChildCount - aOldChildCount);
for (nsIContent* child = aDest->GetFirstChild();
child;
child = child->GetNextSibling()) {
childNodes.AppendElement(child);
}
Element::FireNodeInserted(aDoc, aDest, childNodes);
}
}
void
Element::GetInnerHTML(nsAString& aInnerHTML, ErrorResult& aError)
{
aError = GetMarkup(false, aInnerHTML);
}
void
Element::SetInnerHTML(const nsAString& aInnerHTML, ErrorResult& aError)
{
FragmentOrElement* target = this;
// Handle template case.
if (nsNodeUtils::IsTemplateElement(target)) {
DocumentFragment* frag =
static_cast<HTMLTemplateElement*>(target)->Content();
MOZ_ASSERT(frag);
target = frag;
}
nsIDocument* doc = target->OwnerDoc();
// Batch possible DOMSubtreeModified events.
mozAutoSubtreeModified subtree(doc, nullptr);
target->FireNodeRemovedForChildren();
// Needed when innerHTML is used in combination with contenteditable
mozAutoDocUpdate updateBatch(doc, UPDATE_CONTENT_MODEL, true);
// Remove childnodes.
uint32_t childCount = target->GetChildCount();
nsAutoMutationBatch mb(target, true, false);
for (uint32_t i = 0; i < childCount; ++i) {
target->RemoveChildAt(0, true);
}
mb.RemovalDone();
nsAutoScriptLoaderDisabler sld(doc);
if (doc->IsHTML()) {
int32_t oldChildCount = target->GetChildCount();
aError = nsContentUtils::ParseFragmentHTML(aInnerHTML,
target,
Tag(),
GetNameSpaceID(),
doc->GetCompatibilityMode() ==
eCompatibility_NavQuirks,
true);
mb.NodesAdded();
// HTML5 parser has notified, but not fired mutation events.
FireMutationEventsForDirectParsing(doc, target, oldChildCount);
} else {
nsCOMPtr<nsIDOMDocumentFragment> df;
aError = nsContentUtils::CreateContextualFragment(target, aInnerHTML,
true,
getter_AddRefs(df));
nsCOMPtr<nsINode> fragment = do_QueryInterface(df);
if (!aError.Failed()) {
// Suppress assertion about node removal mutation events that can't have
// listeners anyway, because no one has had the chance to register mutation
// listeners on the fragment that comes from the parser.
nsAutoScriptBlockerSuppressNodeRemoved scriptBlocker;
static_cast<nsINode*>(target)->AppendChild(*fragment, aError);
mb.NodesAdded();
}
}
}
void
Element::GetOuterHTML(nsAString& aOuterHTML, ErrorResult& aError)
{
aError = GetMarkup(true, aOuterHTML);
}
void
Element::SetOuterHTML(const nsAString& aOuterHTML, ErrorResult& aError)
{
nsCOMPtr<nsINode> parent = GetParentNode();
if (!parent) {
return;
}
if (parent->NodeType() == nsIDOMNode::DOCUMENT_NODE) {
aError.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
return;
}
if (OwnerDoc()->IsHTML()) {
nsIAtom* localName;
int32_t namespaceID;
if (parent->IsElement()) {
localName = static_cast<nsIContent*>(parent.get())->Tag();
namespaceID = static_cast<nsIContent*>(parent.get())->GetNameSpaceID();
} else {
NS_ASSERTION(parent->NodeType() == nsIDOMNode::DOCUMENT_FRAGMENT_NODE,
"How come the parent isn't a document, a fragment or an element?");
localName = nsGkAtoms::body;
namespaceID = kNameSpaceID_XHTML;
}
nsRefPtr<DocumentFragment> fragment =
new DocumentFragment(OwnerDoc()->NodeInfoManager());
nsContentUtils::ParseFragmentHTML(aOuterHTML,
fragment,
localName,
namespaceID,
OwnerDoc()->GetCompatibilityMode() ==
eCompatibility_NavQuirks,
true);
parent->ReplaceChild(*fragment, *this, aError);
return;
}
nsCOMPtr<nsINode> context;
if (parent->IsElement()) {
context = parent;
} else {
NS_ASSERTION(parent->NodeType() == nsIDOMNode::DOCUMENT_FRAGMENT_NODE,
"How come the parent isn't a document, a fragment or an element?");
nsCOMPtr<nsINodeInfo> info =
OwnerDoc()->NodeInfoManager()->GetNodeInfo(nsGkAtoms::body,
nullptr,
kNameSpaceID_XHTML,
nsIDOMNode::ELEMENT_NODE);
context = NS_NewHTMLBodyElement(info.forget(), FROM_PARSER_FRAGMENT);
}
nsCOMPtr<nsIDOMDocumentFragment> df;
aError = nsContentUtils::CreateContextualFragment(context,
aOuterHTML,
true,
getter_AddRefs(df));
if (aError.Failed()) {
return;
}
nsCOMPtr<nsINode> fragment = do_QueryInterface(df);
parent->ReplaceChild(*fragment, *this, aError);
}
enum nsAdjacentPosition {
eBeforeBegin,
eAfterBegin,
eBeforeEnd,
eAfterEnd
};
void
Element::InsertAdjacentHTML(const nsAString& aPosition, const nsAString& aText,
ErrorResult& aError)
{
nsAdjacentPosition position;
if (aPosition.LowerCaseEqualsLiteral("beforebegin")) {
position = eBeforeBegin;
} else if (aPosition.LowerCaseEqualsLiteral("afterbegin")) {
position = eAfterBegin;
} else if (aPosition.LowerCaseEqualsLiteral("beforeend")) {
position = eBeforeEnd;
} else if (aPosition.LowerCaseEqualsLiteral("afterend")) {
position = eAfterEnd;
} else {
aError.Throw(NS_ERROR_DOM_SYNTAX_ERR);
return;
}
nsCOMPtr<nsIContent> destination;
if (position == eBeforeBegin || position == eAfterEnd) {
destination = GetParent();
if (!destination) {
aError.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
return;
}
} else {
destination = this;
}
nsIDocument* doc = OwnerDoc();
// Needed when insertAdjacentHTML is used in combination with contenteditable
mozAutoDocUpdate updateBatch(doc, UPDATE_CONTENT_MODEL, true);
nsAutoScriptLoaderDisabler sld(doc);
// Batch possible DOMSubtreeModified events.
mozAutoSubtreeModified subtree(doc, nullptr);
// Parse directly into destination if possible
if (doc->IsHTML() && !OwnerDoc()->MayHaveDOMMutationObservers() &&
(position == eBeforeEnd ||
(position == eAfterEnd && !GetNextSibling()) ||
(position == eAfterBegin && !GetFirstChild()))) {
int32_t oldChildCount = destination->GetChildCount();
int32_t contextNs = destination->GetNameSpaceID();
nsIAtom* contextLocal = destination->Tag();
if (contextLocal == nsGkAtoms::html && contextNs == kNameSpaceID_XHTML) {
// For compat with IE6 through IE9. Willful violation of HTML5 as of
// 2011-04-06. CreateContextualFragment does the same already.
// Spec bug: http://www.w3.org/Bugs/Public/show_bug.cgi?id=12434
contextLocal = nsGkAtoms::body;
}
aError = nsContentUtils::ParseFragmentHTML(aText,
destination,
contextLocal,
contextNs,
doc->GetCompatibilityMode() ==
eCompatibility_NavQuirks,
true);
// HTML5 parser has notified, but not fired mutation events.
FireMutationEventsForDirectParsing(doc, destination, oldChildCount);
return;
}
// couldn't parse directly
nsCOMPtr<nsIDOMDocumentFragment> df;
aError = nsContentUtils::CreateContextualFragment(destination,
aText,
true,
getter_AddRefs(df));
if (aError.Failed()) {
return;
}
nsCOMPtr<nsINode> fragment = do_QueryInterface(df);
// Suppress assertion about node removal mutation events that can't have
// listeners anyway, because no one has had the chance to register mutation
// listeners on the fragment that comes from the parser.
nsAutoScriptBlockerSuppressNodeRemoved scriptBlocker;
nsAutoMutationBatch mb(destination, true, false);
switch (position) {
case eBeforeBegin:
destination->InsertBefore(*fragment, this, aError);
break;
case eAfterBegin:
static_cast<nsINode*>(this)->InsertBefore(*fragment, GetFirstChild(),
aError);
break;
case eBeforeEnd:
static_cast<nsINode*>(this)->AppendChild(*fragment, aError);
break;
case eAfterEnd:
destination->InsertBefore(*fragment, GetNextSibling(), aError);
break;
}
}
nsIEditor*
Element::GetEditorInternal()
{
nsCOMPtr<nsITextControlElement> textCtrl = do_QueryInterface(this);
return textCtrl ? textCtrl->GetTextEditor() : nullptr;
}
nsresult
Element::SetBoolAttr(nsIAtom* aAttr, bool aValue)
{
if (aValue) {
return SetAttr(kNameSpaceID_None, aAttr, EmptyString(), true);
}
return UnsetAttr(kNameSpaceID_None, aAttr, true);
}
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