Mirror of roytam1's Pale Moon fork just in case Moonchild and Tobin decide to go after him https://github.com/roytam1/palemoon27
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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/. */
/*
* 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/dom/ElementInlines.h"
#include "AnimationCommon.h"
#include "mozilla/DebugOnly.h"
#include "mozilla/dom/Animation.h"
#include "mozilla/dom/Attr.h"
#include "nsDOMAttributeMap.h"
#include "nsIAtom.h"
#include "nsIContentInlines.h"
#include "mozilla/dom/NodeInfo.h"
#include "nsIDocumentInlines.h"
#include "nsIDOMNodeList.h"
#include "nsIDOMDocument.h"
#include "nsIContentIterator.h"
#include "nsFocusManager.h"
#include "nsFrameManager.h"
#include "nsILinkHandler.h"
#include "nsIScriptGlobalObject.h"
#include "nsIURL.h"
#include "nsContainerFrame.h"
#include "nsIAnonymousContentCreator.h"
#include "nsIPresShell.h"
#include "nsPresContext.h"
#include "nsStyleConsts.h"
#include "nsString.h"
#include "nsUnicharUtils.h"
#include "nsIDOMEvent.h"
#include "nsDOMCID.h"
#include "nsIServiceManager.h"
#include "nsIDOMCSSStyleDeclaration.h"
#include "nsDOMCSSAttrDeclaration.h"
#include "nsNameSpaceManager.h"
#include "nsContentList.h"
#include "nsVariant.h"
#include "nsDOMSettableTokenList.h"
#include "nsDOMTokenList.h"
#include "nsXBLPrototypeBinding.h"
#include "nsError.h"
#include "nsDOMString.h"
#include "nsIScriptSecurityManager.h"
#include "nsIDOMMutationEvent.h"
#include "mozilla/AnimationComparator.h"
#include "mozilla/AsyncEventDispatcher.h"
#include "mozilla/ContentEvents.h"
#include "mozilla/EventDispatcher.h"
#include "mozilla/EventListenerManager.h"
#include "mozilla/EventStateManager.h"
#include "mozilla/EventStates.h"
#include "mozilla/InternalMutationEvent.h"
#include "mozilla/MouseEvents.h"
#include "mozilla/TextEvents.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 "nsSVGElement.h"
#include "nsFrameSelection.h"
#ifdef DEBUG
#include "nsRange.h"
#endif
#include "nsBindingManager.h"
#include "nsXBLBinding.h"
#include "nsPIDOMWindow.h"
#include "nsPIBoxObject.h"
#include "mozilla/dom/DOMRect.h"
#include "nsSVGUtils.h"
#include "nsLayoutUtils.h"
#include "nsGkAtoms.h"
#include "nsContentUtils.h"
#include "ChildIterator.h"
#include "nsIDOMEventListener.h"
#include "nsIWebNavigation.h"
#include "nsIBaseWindow.h"
#include "nsIWidget.h"
#include "nsNodeInfoManager.h"
#include "nsICategoryManager.h"
#include "nsIDOMDocumentType.h"
#include "nsGenericHTMLElement.h"
#include "nsIEditor.h"
#include "nsIEditorIMESupport.h"
#include "nsContentCreatorFunctions.h"
#include "nsIControllers.h"
#include "nsView.h"
#include "nsViewManager.h"
#include "nsIScrollableFrame.h"
#include "mozilla/css/StyleRule.h" /* For nsCSSSelectorList */
#include "nsCSSRuleProcessor.h"
#include "nsRuleProcessorData.h"
#include "nsTextNode.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 "xpcpublic.h"
#include "nsIScriptError.h"
#include "mozilla/Telemetry.h"
#include "mozilla/CORSMode.h"
#include "mozilla/dom/ShadowRoot.h"
#include "mozilla/dom/NodeListBinding.h"
#include "nsStyledElement.h"
#include "nsXBLService.h"
#include "nsITextControlElement.h"
#include "nsITextControlFrame.h"
#include "nsISupportsImpl.h"
#include "mozilla/dom/DocumentFragment.h"
#include "mozilla/IntegerPrintfMacros.h"
#include "mozilla/dom/WindowBinding.h"
#include "mozilla/dom/ElementBinding.h"
#include "mozilla/dom/VRDevice.h"
#include "nsComputedDOMStyle.h"
#include "mozilla/Preferences.h"
using namespace mozilla;
using namespace mozilla::dom;
nsIAtom*
nsIContent::DoGetID() const
{
MOZ_ASSERT(HasID(), "Unexpected call");
MOZ_ASSERT(IsElement(), "Only elements can have IDs");
return AsElement()->GetParsedAttr(nsGkAtoms::id)->GetAtomValue();
}
const nsAttrValue*
nsIContent::DoGetClasses() const
{
MOZ_ASSERT(HasFlag(NODE_MAY_HAVE_CLASS), "Unexpected call");
MOZ_ASSERT(IsElement(), "Only elements can have classes");
if (IsSVGElement()) {
const nsAttrValue* animClass =
static_cast<const nsSVGElement*>(this)->GetAnimatedClassName();
if (animClass) {
return animClass;
}
}
return AsElement()->GetParsedAttr(nsGkAtoms::_class);
}
NS_IMETHODIMP
Element::QueryInterface(REFNSIID aIID, void** aInstancePtr)
{
if (aIID.Equals(NS_GET_IID(Element))) {
NS_ADDREF_THIS();
*aInstancePtr = this;
return NS_OK;
}
NS_ASSERTION(aInstancePtr,
"QueryInterface requires a non-NULL destination!");
nsresult rv = FragmentOrElement::QueryInterface(aIID, aInstancePtr);
if (NS_SUCCEEDED(rv)) {
return NS_OK;
}
// Give the binding manager a chance to get an interface for this element.
return OwnerDoc()->BindingManager()->GetBindingImplementation(this, aIID,
aInstancePtr);
}
EventStates
Element::IntrinsicState() const
{
return IsEditable() ? NS_EVENT_STATE_MOZ_READWRITE :
NS_EVENT_STATE_MOZ_READONLY;
}
void
Element::NotifyStateChange(EventStates aStates)
{
nsIDocument* doc = GetCrossShadowCurrentDoc();
if (doc) {
nsAutoScriptBlocker scriptBlocker;
doc->ContentStateChanged(this, aStates);
}
}
void
Element::UpdateLinkState(EventStates aState)
{
MOZ_ASSERT(!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)
{
EventStates oldState = mState;
mState = IntrinsicState() | (oldState & ESM_MANAGED_STATES);
if (aNotify) {
EventStates changedStates = oldState ^ mState;
if (!changedStates.IsEmpty()) {
nsIDocument* doc = GetCrossShadowCurrentDoc();
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();
// Skip over unknown native anonymous content to avoid setting a flag we
// can't clear later
bool isUnknownNativeAnon = false;
if (IsInNativeAnonymousSubtree()) {
isUnknownNativeAnon = true;
nsCOMPtr<nsIContent> root = this;
while (root && !root->IsRootOfNativeAnonymousSubtree()) {
root = root->GetParent();
}
// root should always be true here, but isn't -- bug 999416
if (root) {
nsIFrame* rootFrame = root->GetPrimaryFrame();
if (rootFrame) {
nsContainerFrame* parentFrame = rootFrame->GetParent();
nsITextControlFrame* textCtrl = do_QueryFrame(parentFrame);
isUnknownNativeAnon = !textCtrl;
}
}
}
SetEditableFlag(parent && parent->HasFlag(NODE_IS_EDITABLE) &&
!isUnknownNativeAnon);
}
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);
}
}
}
EventStates
Element::StyleStateFromLocks() const
{
EventStates locks = LockedStyleStates();
EventStates 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;
}
EventStates
Element::LockedStyleStates() const
{
EventStates* locks =
static_cast<EventStates*>(GetProperty(nsGkAtoms::lockedStyleStates));
if (locks) {
return *locks;
}
return EventStates();
}
void
Element::NotifyStyleStateChange(EventStates aStates)
{
nsIDocument* doc = GetComposedDoc();
if (doc) {
nsIPresShell *presShell = doc->GetShell();
if (presShell) {
nsAutoScriptBlocker scriptBlocker;
presShell->ContentStateChanged(doc, this, aStates);
}
}
}
void
Element::LockStyleStates(EventStates aStates)
{
EventStates* locks = new EventStates(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,
nsINode::DeleteProperty<EventStates>);
SetHasLockedStyleStates();
NotifyStyleStateChange(aStates);
}
void
Element::UnlockStyleStates(EventStates aStates)
{
EventStates* locks = new EventStates(LockedStyleStates());
*locks &= ~aStates;
if (locks->IsEmpty()) {
DeleteProperty(nsGkAtoms::lockedStyleStates);
ClearHasLockedStyleStates();
delete locks;
}
else {
SetProperty(nsGkAtoms::lockedStyleStates, locks,
nsINode::DeleteProperty<EventStates>);
}
NotifyStyleStateChange(aStates);
}
void
Element::ClearStyleStateLocks()
{
EventStates 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 = (IsXULElement() ||
IsHTMLElement(nsGkAtoms::object) ||
IsHTMLElement(nsGkAtoms::embed) ||
IsHTMLElement(nsGkAtoms::applet));
nsCOMPtr<nsIPresShell> shell = aDocument->GetShell();
if (!shell || GetPrimaryFrame() || !isXULorPluginElement) {
*aResult = nullptr;
return true;
}
// Get the computed -moz-binding directly from the style context
nsRefPtr<nsStyleContext> sc =
nsComputedDOMStyle::GetStyleContextForElementNoFlush(this, nullptr, shell);
NS_ENSURE_TRUE(sc, false);
*aResult = sc->StyleDisplay()->mBinding;
return true;
}
JSObject*
Element::WrapObject(JSContext *aCx, JS::Handle<JSObject*> aGivenProto)
{
JS::Rooted<JSObject*> givenProto(aCx, aGivenProto);
JS::Rooted<JSObject*> customProto(aCx);
if (!givenProto) {
// Custom element prototype swizzling.
CustomElementData* data = GetCustomElementData();
if (data) {
// If this is a registered custom element then fix the prototype.
nsDocument* document = static_cast<nsDocument*>(OwnerDoc());
document->GetCustomPrototype(NodeInfo()->NamespaceID(), data->mType, &customProto);
if (customProto &&
NodePrincipal()->SubsumesConsideringDomain(nsContentUtils::ObjectPrincipal(customProto))) {
// Just go ahead and create with the right proto up front. Set
// customProto to null to flag that we don't need to do any post-facto
// proto fixups here.
givenProto = customProto;
customProto = nullptr;
}
}
}
JS::Rooted<JSObject*> obj(aCx, nsINode::WrapObject(aCx, givenProto));
if (!obj) {
return nullptr;
}
if (customProto) {
// We want to set the custom prototype in the compartment where it was
// registered. In the case that |obj| and |prototype| are in different
// compartments, this will set the prototype on the |obj|'s wrapper and
// thus only visible in the wrapper's compartment, since we know obj's
// principal does not subsume customProto's in this case.
JSAutoCompartment ac(aCx, customProto);
JS::Rooted<JSObject*> wrappedObj(aCx, obj);
if (!JS_WrapObject(aCx, &wrappedObj) ||
!JS_SetPrototype(aCx, wrappedObj, customProto)) {
return nullptr;
}
}
nsIDocument* doc;
if (HasFlag(NODE_FORCE_XBL_BINDINGS)) {
doc = OwnerDoc();
}
else {
doc = GetComposedDoc();
}
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) && GetXBLBinding()) {
// 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(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(aCx, NS_ERROR_NOT_AVAILABLE);
return nullptr;
}
{
// Make a scope so that ~nsRefPtr can GC before returning obj.
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;
}
/* virtual */
nsINode*
Element::GetScopeChainParent() const
{
return OwnerDoc();
}
nsDOMTokenList*
Element::ClassList()
{
Element::nsDOMSlots* slots = DOMSlots();
if (!slots->mClassList) {
slots->mClassList = new nsDOMTokenList(this, nsGkAtoms::_class);
}
return slots->mClassList;
}
void
Element::GetClassList(nsISupports** aClassList)
{
NS_ADDREF(*aClassList = ClassList());
}
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).take();
}
nsIFrame*
Element::GetStyledFrame()
{
nsIFrame *frame = GetPrimaryFrame(Flush_Layout);
return frame ? nsLayoutUtils::GetStyleFrame(frame) : nullptr;
}
nsIScrollableFrame*
Element::GetScrollFrame(nsIFrame **aStyledFrame, bool aFlushLayout)
{
// it isn't clear what to return for SVG nodes, so just return nothing
if (IsSVGElement()) {
if (aStyledFrame) {
*aStyledFrame = nullptr;
}
return nullptr;
}
// Inline version of GetStyledFrame to use Flush_None if needed.
nsIFrame* frame = GetPrimaryFrame(aFlushLayout ? Flush_Layout : Flush_None);
if (frame) {
frame = nsLayoutUtils::GetStyleFrame(frame);
}
if (aStyledFrame) {
*aStyledFrame = frame;
}
if (!frame) {
return nullptr;
}
// menu frames implement GetScrollTargetFrame but we don't want
// to use it here. Similar for comboboxes.
nsIAtom* type = frame->GetType();
if (type != nsGkAtoms::menuFrame && type != 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()
{
ScrollIntoView(ScrollIntoViewOptions());
}
void
Element::ScrollIntoView(bool aTop)
{
ScrollIntoViewOptions options;
if (!aTop) {
options.mBlock = ScrollLogicalPosition::End;
}
ScrollIntoView(options);
}
void
Element::ScrollIntoView(const ScrollIntoViewOptions &aOptions)
{
nsIDocument *document = GetComposedDoc();
if (!document) {
return;
}
// Get the presentation shell
nsCOMPtr<nsIPresShell> presShell = document->GetShell();
if (!presShell) {
return;
}
int16_t vpercent = (aOptions.mBlock == ScrollLogicalPosition::Start)
? nsIPresShell::SCROLL_TOP
: nsIPresShell::SCROLL_BOTTOM;
uint32_t flags = nsIPresShell::SCROLL_OVERFLOW_HIDDEN;
if (aOptions.mBehavior == ScrollBehavior::Smooth) {
flags |= nsIPresShell::SCROLL_SMOOTH;
} else if (aOptions.mBehavior == ScrollBehavior::Auto) {
flags |= nsIPresShell::SCROLL_SMOOTH_AUTO;
}
presShell->ScrollContentIntoView(this,
nsIPresShell::ScrollAxis(
vpercent,
nsIPresShell::SCROLL_ALWAYS),
nsIPresShell::ScrollAxis(),
flags);
}
void
Element::Scroll(const CSSIntPoint& aScroll, const ScrollOptions& aOptions)
{
nsIScrollableFrame* sf = GetScrollFrame();
if (sf) {
nsIScrollableFrame::ScrollMode scrollMode = nsIScrollableFrame::INSTANT;
if (aOptions.mBehavior == ScrollBehavior::Smooth) {
scrollMode = nsIScrollableFrame::SMOOTH_MSD;
} else if (aOptions.mBehavior == ScrollBehavior::Auto) {
ScrollbarStyles styles = sf->GetScrollbarStyles();
if (styles.mScrollBehavior == NS_STYLE_SCROLL_BEHAVIOR_SMOOTH) {
scrollMode = nsIScrollableFrame::SMOOTH_MSD;
}
}
sf->ScrollToCSSPixels(aScroll, scrollMode);
}
}
void
Element::Scroll(double aXScroll, double aYScroll)
{
// Convert -Inf, Inf, and NaN to 0; otherwise, convert by C-style cast.
CSSIntPoint scrollPos(mozilla::ToZeroIfNonfinite(aXScroll),
mozilla::ToZeroIfNonfinite(aYScroll));
Scroll(scrollPos, ScrollOptions());
}
void
Element::Scroll(const ScrollToOptions& aOptions)
{
nsIScrollableFrame *sf = GetScrollFrame();
if (sf) {
CSSIntPoint scrollPos = sf->GetScrollPositionCSSPixels();
if (aOptions.mLeft.WasPassed()) {
scrollPos.x = mozilla::ToZeroIfNonfinite(aOptions.mLeft.Value());
}
if (aOptions.mTop.WasPassed()) {
scrollPos.y = mozilla::ToZeroIfNonfinite(aOptions.mTop.Value());
}
Scroll(scrollPos, aOptions);
}
}
void
Element::ScrollTo(double aXScroll, double aYScroll)
{
Scroll(aXScroll, aYScroll);
}
void
Element::ScrollTo(const ScrollToOptions& aOptions)
{
Scroll(aOptions);
}
void
Element::ScrollBy(double aXScrollDif, double aYScrollDif)
{
nsIScrollableFrame *sf = GetScrollFrame();
if (sf) {
CSSIntPoint scrollPos = sf->GetScrollPositionCSSPixels();
scrollPos += CSSIntPoint(mozilla::ToZeroIfNonfinite(aXScrollDif),
mozilla::ToZeroIfNonfinite(aYScrollDif));
Scroll(scrollPos, ScrollOptions());
}
}
void
Element::ScrollBy(const ScrollToOptions& aOptions)
{
nsIScrollableFrame *sf = GetScrollFrame();
if (sf) {
CSSIntPoint scrollPos = sf->GetScrollPositionCSSPixels();
if (aOptions.mLeft.WasPassed()) {
scrollPos.x += mozilla::ToZeroIfNonfinite(aOptions.mLeft.Value());
}
if (aOptions.mTop.WasPassed()) {
scrollPos.y += mozilla::ToZeroIfNonfinite(aOptions.mTop.Value());
}
Scroll(scrollPos, aOptions);
}
}
int32_t
Element::ScrollTop()
{
nsIScrollableFrame* sf = GetScrollFrame();
return sf ? sf->GetScrollPositionCSSPixels().y : 0;
}
void
Element::SetScrollTop(int32_t aScrollTop)
{
nsIScrollableFrame* sf = GetScrollFrame();
if (sf) {
nsIScrollableFrame::ScrollMode scrollMode = nsIScrollableFrame::INSTANT;
if (sf->GetScrollbarStyles().mScrollBehavior == NS_STYLE_SCROLL_BEHAVIOR_SMOOTH) {
scrollMode = nsIScrollableFrame::SMOOTH_MSD;
}
sf->ScrollToCSSPixels(CSSIntPoint(sf->GetScrollPositionCSSPixels().x,
aScrollTop),
scrollMode);
}
}
int32_t
Element::ScrollLeft()
{
nsIScrollableFrame* sf = GetScrollFrame();
return sf ? sf->GetScrollPositionCSSPixels().x : 0;
}
void
Element::SetScrollLeft(int32_t aScrollLeft)
{
nsIScrollableFrame* sf = GetScrollFrame();
if (sf) {
nsIScrollableFrame::ScrollMode scrollMode = nsIScrollableFrame::INSTANT;
if (sf->GetScrollbarStyles().mScrollBehavior == NS_STYLE_SCROLL_BEHAVIOR_SMOOTH) {
scrollMode = nsIScrollableFrame::SMOOTH_MSD;
}
sf->ScrollToCSSPixels(CSSIntPoint(aScrollLeft,
sf->GetScrollPositionCSSPixels().y),
scrollMode);
}
}
bool
Element::ScrollByNoFlush(int32_t aDx, int32_t aDy)
{
nsIScrollableFrame* sf = GetScrollFrame(nullptr, false);
if (!sf) {
return false;
}
nsWeakFrame weakRef(sf->GetScrolledFrame());
CSSIntPoint before = sf->GetScrollPositionCSSPixels();
sf->ScrollToCSSPixelsApproximate(CSSIntPoint(before.x + aDx, before.y + aDy));
// The frame was destroyed, can't keep on scrolling.
if (!weakRef.IsAlive()) {
return false;
}
CSSIntPoint after = sf->GetScrollPositionCSSPixels();
return (before != after);
}
void
Element::MozScrollSnap()
{
nsIScrollableFrame* sf = GetScrollFrame(nullptr, false);
if (sf) {
sf->ScrollSnap();
}
}
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 (IsSVGElement())
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 (IsSVGElement())
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<DOMRect>
Element::GetBoundingClientRect()
{
nsRefPtr<DOMRect> rect = new DOMRect(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<DOMRectList>
Element::GetClientRects()
{
nsRefPtr<DOMRectList> rectList = new DOMRectList(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::AddToIdTable(nsIAtom* aId)
{
NS_ASSERTION(HasID(), "Node doesn't have an ID?");
if (IsInShadowTree()) {
ShadowRoot* containingShadow = GetContainingShadow();
containingShadow->AddToIdTable(this, aId);
} else {
nsIDocument* doc = GetUncomposedDoc();
if (doc && (!IsInAnonymousSubtree() || doc->IsXULDocument())) {
doc->AddToIdTable(this, aId);
}
}
}
void
Element::RemoveFromIdTable()
{
if (!HasID()) {
return;
}
nsIAtom* id = DoGetID();
if (IsInShadowTree()) {
ShadowRoot* containingShadow = GetContainingShadow();
// Check for containingShadow because it may have
// been deleted during unlinking.
if (containingShadow) {
containingShadow->RemoveFromIdTable(this, id);
}
} else {
nsIDocument* doc = GetUncomposedDoc();
if (doc && (!IsInAnonymousSubtree() || doc->IsXULDocument())) {
doc->RemoveFromIdTable(this, id);
}
}
}
already_AddRefed<ShadowRoot>
Element::CreateShadowRoot(ErrorResult& aError)
{
nsAutoScriptBlocker scriptBlocker;
nsRefPtr<mozilla::dom::NodeInfo> nodeInfo;
nodeInfo = mNodeInfo->NodeInfoManager()->GetNodeInfo(
nsGkAtoms::documentFragmentNodeName, nullptr, kNameSpaceID_None,
nsIDOMNode::DOCUMENT_FRAGMENT_NODE);
nsRefPtr<nsXBLDocumentInfo> docInfo = new nsXBLDocumentInfo(OwnerDoc());
nsXBLPrototypeBinding* protoBinding = new nsXBLPrototypeBinding();
aError = protoBinding->Init(NS_LITERAL_CSTRING("shadowroot"),
docInfo, nullptr, true);
if (aError.Failed()) {
delete protoBinding;
return nullptr;
}
nsIDocument* doc = GetCrossShadowCurrentDoc();
nsIContent* destroyedFramesFor = nullptr;
if (doc) {
nsIPresShell* shell = doc->GetShell();
if (shell) {
shell->DestroyFramesFor(this, &destroyedFramesFor);
MOZ_ASSERT(!shell->FrameManager()->GetDisplayContentsStyleFor(this));
}
}
MOZ_ASSERT(!GetPrimaryFrame());
// Unlike for XBL, false is the default for inheriting style.
protoBinding->SetInheritsStyle(false);
// Calling SetPrototypeBinding takes ownership of protoBinding.
docInfo->SetPrototypeBinding(NS_LITERAL_CSTRING("shadowroot"), protoBinding);
nsRefPtr<ShadowRoot> shadowRoot = new ShadowRoot(this, nodeInfo.forget(),
protoBinding);
shadowRoot->SetIsComposedDocParticipant(IsInComposedDoc());
// Replace the old ShadowRoot with the new one and let the old
// ShadowRoot know about the younger ShadowRoot because the old
// ShadowRoot is projected into the younger ShadowRoot's shadow
// insertion point (if it exists).
ShadowRoot* olderShadow = GetShadowRoot();
SetShadowRoot(shadowRoot);
if (olderShadow) {
olderShadow->SetYoungerShadow(shadowRoot);
// Unbind children of older shadow root because they
// are no longer in the composed tree.
for (nsIContent* child = olderShadow->GetFirstChild(); child;
child = child->GetNextSibling()) {
child->UnbindFromTree(true, false);
}
olderShadow->SetIsComposedDocParticipant(false);
}
// xblBinding takes ownership of docInfo.
nsRefPtr<nsXBLBinding> xblBinding = new nsXBLBinding(shadowRoot, protoBinding);
shadowRoot->SetAssociatedBinding(xblBinding);
xblBinding->SetBoundElement(this);
SetXBLBinding(xblBinding);
// Recreate the frame for the bound content because binding a ShadowRoot
// changes how things are rendered.
if (doc) {
MOZ_ASSERT(doc == GetCrossShadowCurrentDoc());
nsIPresShell* shell = doc->GetShell();
if (shell) {
shell->CreateFramesFor(destroyedFramesFor);
}
}
return shadowRoot.forget();
}
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(DestinationInsertionPointList, mParent,
mDestinationPoints)
NS_INTERFACE_TABLE_HEAD(DestinationInsertionPointList)
NS_WRAPPERCACHE_INTERFACE_TABLE_ENTRY
NS_INTERFACE_TABLE(DestinationInsertionPointList, nsINodeList, nsIDOMNodeList)
NS_INTERFACE_TABLE_TO_MAP_SEGUE_CYCLE_COLLECTION(DestinationInsertionPointList)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(DestinationInsertionPointList)
NS_IMPL_CYCLE_COLLECTING_RELEASE(DestinationInsertionPointList)
DestinationInsertionPointList::DestinationInsertionPointList(Element* aElement)
: mParent(aElement)
{
nsTArray<nsIContent*>* destPoints = aElement->GetExistingDestInsertionPoints();
if (destPoints) {
for (uint32_t i = 0; i < destPoints->Length(); i++) {
mDestinationPoints.AppendElement(destPoints->ElementAt(i));
}
}
}
DestinationInsertionPointList::~DestinationInsertionPointList()
{
}
nsIContent*
DestinationInsertionPointList::Item(uint32_t aIndex)
{
return mDestinationPoints.SafeElementAt(aIndex);
}
NS_IMETHODIMP
DestinationInsertionPointList::Item(uint32_t aIndex, nsIDOMNode** aReturn)
{
nsIContent* item = Item(aIndex);
if (!item) {
return NS_ERROR_FAILURE;
}
return CallQueryInterface(item, aReturn);
}
uint32_t
DestinationInsertionPointList::Length() const
{
return mDestinationPoints.Length();
}
NS_IMETHODIMP
DestinationInsertionPointList::GetLength(uint32_t* aLength)
{
*aLength = Length();
return NS_OK;
}
int32_t
DestinationInsertionPointList::IndexOf(nsIContent* aContent)
{
return mDestinationPoints.IndexOf(aContent);
}
JSObject*
DestinationInsertionPointList::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
return NodeListBinding::Wrap(aCx, this, aGivenProto);
}
already_AddRefed<DestinationInsertionPointList>
Element::GetDestinationInsertionPoints()
{
nsRefPtr<DestinationInsertionPointList> list =
new DestinationInsertionPointList(this);
return list.forget();
}
void
Element::GetAttribute(const nsAString& aName, DOMString& aReturn)
{
const nsAttrValue* val =
mAttrsAndChildren.GetAttr(aName,
IsHTMLElement() && IsInHTMLDocument() ?
eIgnoreCase : eCaseMatters);
if (val) {
val->ToString(aReturn);
} else {
if (IsXULElement()) {
// XXX should be SetDOMStringToNull(aReturn);
// See bug 232598
// aReturn is already empty
} else {
aReturn.SetNull();
}
}
}
bool
Element::ToggleAttribute(const nsAString& aName,
const Optional<bool>& aForce,
ErrorResult& aError)
{
aError = nsContentUtils::CheckQName(aName, false);
if (aError.Failed()) {
return false;
}
nsAutoString nameToUse;
const nsAttrName* name = InternalGetAttrNameFromQName(aName, &nameToUse);
if (!name) {
if (aForce.WasPassed() && !aForce.Value()) {
return false;
}
nsCOMPtr<nsIAtom> nameAtom = NS_AtomizeMainThread(nameToUse);
if (!nameAtom) {
aError.Throw(NS_ERROR_OUT_OF_MEMORY);
return false;
}
aError = SetAttr(kNameSpaceID_None, nameAtom, EmptyString(), true);
return true;
}
if (aForce.WasPassed() && aForce.Value()) {
return true;
}
// 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);
return false;
}
void
Element::SetAttribute(const nsAString& aName,
const nsAString& aValue,
ErrorResult& aError)
{
aError = nsContentUtils::CheckQName(aName, false);
if (aError.Failed()) {
return;
}
nsAutoString nameToUse;
const nsAttrName* name = InternalGetAttrNameFromQName(aName, &nameToUse);
if (!name) {
nsCOMPtr<nsIAtom> nameAtom = NS_AtomizeMainThread(nameToUse);
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 = InternalGetAttrNameFromQName(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)
{
Element *elem = aAttribute.GetElement();
if (elem != this) {
aError.Throw(NS_ERROR_DOM_NOT_FOUND_ERR);
return nullptr;
}
OwnerDoc()->WarnOnceAbout(nsIDocument::eRemoveAttributeNode);
nsAutoString nameSpaceURI;
aAttribute.NodeInfo()->GetNamespaceURI(nameSpaceURI);
return Attributes()->RemoveNamedItemNS(nameSpaceURI, aAttribute.NodeInfo()->LocalName(), 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 = NS_AtomizeMainThread(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)
{
nsRefPtr<mozilla::dom::NodeInfo> 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 = NS_AtomizeMainThread(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.StealNSResult();
}
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 = NS_AtomizeMainThread(aLocalName);
return HasAttr(nsid, name);
}
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).take();
return NS_OK;
}
/**
* Returns the count of descendants (inclusive of aContent) in
* the uncomposed document that are explicitly set as editable.
*/
static uint32_t
EditableInclusiveDescendantCount(nsIContent* aContent)
{
auto htmlElem = nsGenericHTMLElement::FromContent(aContent);
if (htmlElem) {
return htmlElem->EditableInclusiveDescendantCount();
}
return aContent->EditableDescendantCount();
}
nsresult
Element::BindToTree(nsIDocument* aDocument, nsIContent* aParent,
nsIContent* aBindingParent,
bool aCompileEventHandlers)
{
NS_PRECONDITION(aParent || aDocument, "Must have document if no parent!");
NS_PRECONDITION((NODE_FROM(aParent, aDocument)->OwnerDoc() == OwnerDoc()),
"Must have the same owner document");
NS_PRECONDITION(!aParent || aDocument == aParent->GetUncomposedDoc(),
"aDocument must be current doc of aParent");
NS_PRECONDITION(!GetUncomposedDoc(), "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_NATIVE_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_NATIVE_ANONYMOUS_SUBTREE);
}
if (aParent->HasFlag(NODE_CHROME_ONLY_ACCESS)) {
SetFlags(NODE_CHROME_ONLY_ACCESS);
}
if (aParent->IsInShadowTree()) {
ClearSubtreeRootPointer();
SetFlags(NODE_IS_IN_SHADOW_TREE);
}
ShadowRoot* parentContainingShadow = aParent->GetContainingShadow();
if (parentContainingShadow) {
DOMSlots()->mContainingShadow = parentContainingShadow;
}
}
bool hadForceXBL = HasFlag(NODE_FORCE_XBL_BINDINGS);
bool hadParent = !!GetParentNode();
// 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);
} else if (IsInShadowTree()) {
// We're not in a document, but we did get inserted into a shadow tree.
// Since we won't have any restyle data in the document's restyle trackers,
// don't let us get inserted with restyle bits set incorrectly.
//
// Also clear all the other flags that are cleared above when we do get
// inserted into a document.
UnsetFlags(NODE_FORCE_XBL_BINDINGS |
NODE_NEEDS_FRAME | NODE_DESCENDANTS_NEED_FRAMES |
ELEMENT_ALL_RESTYLE_FLAGS);
} else {
// If we're not in the doc and not in a shadow tree,
// update our subtree pointer.
SetSubtreeRootPointer(aParent->SubtreeRoot());
}
nsIDocument* composedDoc = GetComposedDoc();
if (composedDoc) {
// Attached callback must be enqueued whenever custom element is inserted into a
// document and this document has a browsing context.
if (GetCustomElementData() && composedDoc->GetDocShell()) {
// Enqueue an attached callback for the custom element.
composedDoc->EnqueueLifecycleCallback(nsIDocument::eAttached, this);
}
}
// Propagate scoped style sheet tracking bit.
if (mParent->IsContent()) {
nsIContent* parent;
ShadowRoot* shadowRootParent = ShadowRoot::FromNode(mParent);
if (shadowRootParent) {
parent = shadowRootParent->GetHost();
} else {
parent = mParent->AsContent();
}
bool inStyleScope = parent->IsElementInStyleScope();
SetIsElementInStyleScope(inStyleScope);
SetIsElementInStyleScopeFlagOnShadowTree(inStyleScope);
}
// 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 (IsHTMLElement()) {
SetDirOnBind(this, aParent);
}
uint32_t editableDescendantCount = 0;
// 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();
nsXBLBinding* contBinding = bmgr->GetBindingWithContent(this);
// First check if we have a binding...
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);
editableDescendantCount += EditableInclusiveDescendantCount(child);
}
}
}
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);
editableDescendantCount += EditableInclusiveDescendantCount(child);
}
if (aDocument) {
// Update our editable descendant count because we don't keep track of it
// for content that is not in the uncomposed document.
MOZ_ASSERT(EditableDescendantCount() == 0);
ChangeEditableDescendantCount(editableDescendantCount);
if (!hadParent) {
uint32_t editableDescendantChange = EditableInclusiveDescendantCount(this);
if (editableDescendantChange != 0) {
// If we are binding a subtree root to the document, we need to update
// the editable descendant count of all the ancestors.
nsIContent* parent = GetParent();
while (parent) {
parent->ChangeEditableDescendantCount(editableDescendantChange);
parent = parent->GetParent();
}
}
}
}
nsNodeUtils::ParentChainChanged(this);
if (HasID()) {
AddToIdTable(DoGetID());
}
if (MayHaveStyle() && !IsXULElement()) {
// 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);
}
}
// Call BindToTree on shadow root children.
ShadowRoot* shadowRoot = GetShadowRoot();
if (shadowRoot) {
shadowRoot->SetIsComposedDocParticipant(IsInComposedDoc());
for (nsIContent* child = shadowRoot->GetFirstChild(); child;
child = child->GetNextSibling()) {
rv = child->BindToTree(nullptr, shadowRoot,
shadowRoot->GetBindingParent(),
aCompileEventHandlers);
NS_ENSURE_SUCCESS(rv, rv);
}
}
// 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 == GetUncomposedDoc(), "Bound to wrong document");
NS_POSTCONDITION(aParent == GetParent(), "Bound to wrong parent");
NS_POSTCONDITION(aBindingParent == GetBindingParent(),
"Bound to wrong binding parent");
return NS_OK;
}
RemoveFromBindingManagerRunnable::RemoveFromBindingManagerRunnable(nsBindingManager* aManager,
nsIContent* aContent,
nsIDocument* aDoc):
mManager(aManager), mContent(aContent), mDoc(aDoc)
{}
RemoveFromBindingManagerRunnable::~RemoveFromBindingManagerRunnable() {}
NS_IMETHODIMP
RemoveFromBindingManagerRunnable::Run()
{
// It may be the case that the element was removed from the
// DOM, causing this runnable to be created, then inserted back
// into the document before the this runnable had a chance to
// tear down the binding. Only tear down the binding if the element
// is still no longer in the DOM. nsXBLService::LoadBinding tears
// down the old binding if the element is inserted back into the
// DOM and loads a different binding.
if (!mContent->IsInComposedDoc()) {
mManager->RemovedFromDocumentInternal(mContent, mDoc);
}
return NS_OK;
}
void
Element::UnbindFromTree(bool aDeep, bool aNullParent)
{
NS_PRECONDITION(aDeep || (!GetUncomposedDoc() && !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() : GetComposedDoc();
if (aNullParent) {
if (IsFullScreenAncestor()) {
// The element being removed is an ancestor of the full-screen element,
// exit full-screen state.
nsContentUtils::ReportToConsole(nsIScriptError::warningFlag,
NS_LITERAL_CSTRING("DOM"), OwnerDoc(),
nsContentUtils::eDOM_PROPERTIES,
"RemovedFullScreenElement");
// Fully exit full-screen.
nsIDocument::ExitFullscreen(OwnerDoc(), /* async */ false);
}
if (HasPointerLock()) {
nsIDocument::UnlockPointer();
}
if (GetParent() && GetParent()->IsInUncomposedDoc()) {
// Update the editable descendant count in the ancestors before we
// lose the reference to the parent.
int32_t editableDescendantChange = -1 * EditableInclusiveDescendantCount(this);
if (editableDescendantChange != 0) {
nsIContent* parent = GetParent();
while (parent) {
parent->ChangeEditableDescendantCount(editableDescendantChange);
parent = parent->GetParent();
}
}
}
if (GetParent()) {
nsRefPtr<nsINode> p;
p.swap(mParent);
} else {
mParent = nullptr;
}
SetParentIsContent(false);
}
ClearInDocument();
// Editable descendant count only counts descendants that
// are in the uncomposed document.
ResetEditableDescendantCount();
if (aNullParent || !mParent->IsInShadowTree()) {
UnsetFlags(NODE_IS_IN_SHADOW_TREE);
// 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.
// Unlike XBL, bindings for web components shadow DOM
// do not get uninstalled.
if (HasFlag(NODE_MAY_BE_IN_BINDING_MNGR) && !GetShadowRoot()) {
nsContentUtils::AddScriptRunner(
new RemoveFromBindingManagerRunnable(document->BindingManager(), this,
document));
}
document->ClearBoxObjectFor(this);
// Detached must be enqueued whenever custom element is removed from
// the document and this document has a browsing context.
if (GetCustomElementData() && document->GetDocShell()) {
// Enqueue a detached callback for the custom element.
document->EnqueueLifecycleCallback(nsIDocument::eDetached, 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);
bool clearBindingParent = true;
#ifdef MOZ_XUL
nsXULElement* xulElem = nsXULElement::FromContent(this);
if (xulElem) {
xulElem->SetXULBindingParent(nullptr);
clearBindingParent = false;
}
#endif
nsDOMSlots* slots = GetExistingDOMSlots();
if (slots) {
if (clearBindingParent) {
slots->mBindingParent = nullptr;
}
if (aNullParent || !mParent->IsInShadowTree()) {
slots->mContainingShadow = 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 (IsHTMLElement()) {
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);
// Unbind children of shadow root.
ShadowRoot* shadowRoot = GetShadowRoot();
if (shadowRoot) {
for (nsIContent* child = shadowRoot->GetFirstChild(); child;
child = child->GetNextSibling()) {
child->UnbindFromTree(true, false);
}
shadowRoot->SetIsComposedDocParticipant(false);
}
}
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 = GetComposedDoc();
// 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) {
// Pass both eRestyle_StyleAttribute and
// eRestyle_StyleAttribute_Animations since we don't know if
// this style represents only the ticking of an existing
// animation or whether it's a new or changed animation.
shell->RestyleForAnimation(this, eRestyle_StyleAttribute |
eRestyle_StyleAttribute_Animations);
}
}
}
return NS_OK;
}
bool
Element::IsLabelable() const
{
return false;
}
bool
Element::IsInteractiveHTMLContent(bool aIgnoreTabindex) 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);
}
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<mozilla::dom::NodeInfo>
Element::GetExistingAttrNameFromQName(const nsAString& aStr) const
{
const nsAttrName* name = InternalGetAttrNameFromQName(aStr);
if (!name) {
return nullptr;
}
nsRefPtr<mozilla::dom::NodeInfo> nodeInfo;
if (name->IsAtom()) {
nodeInfo = mNodeInfo->NodeInfoManager()->
GetNodeInfo(name->Atom(), nullptr, kNameSpaceID_None,
nsIDOMNode::ATTRIBUTE_NODE);
}
else {
nodeInfo = name->NodeInfo();
}
return nodeInfo.forget();
}
// 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->GetComposedDoc();
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,
WidgetEvent* 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,
WidgetInputEvent* aSourceEvent,
nsIContent* aTarget,
bool aFullDispatch,
const EventFlags* aExtraEventFlags,
nsEventStatus* aStatus)
{
NS_PRECONDITION(aTarget, "Must have target");
NS_PRECONDITION(aSourceEvent, "Must have source event");
NS_PRECONDITION(aStatus, "Null out param?");
WidgetMouseEvent event(aSourceEvent->mFlags.mIsTrusted, eMouseClick,
aSourceEvent->widget, WidgetMouseEvent::eReal);
event.refPoint = aSourceEvent->refPoint;
uint32_t clickCount = 1;
float pressure = 0;
uint16_t inputSource = 0;
WidgetMouseEvent* sourceMouseEvent = aSourceEvent->AsMouseEvent();
if (sourceMouseEvent) {
clickCount = sourceMouseEvent->clickCount;
pressure = sourceMouseEvent->pressure;
inputSource = sourceMouseEvent->inputSource;
} else if (aSourceEvent->mClass == eKeyboardEventClass) {
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 = GetComposedDoc();
if (!doc) {
return nullptr;
}
// Cause a flush, so we get up-to-date frame
// information
if (aType != Flush_None) {
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;
EventListenerManager* manager =
GetEventListenerManagerForAttr(aEventName, &defer);
if (!manager) {
return NS_OK;
}
defer = defer && aDefer; // only defer if everyone agrees...
manager->SetEventHandler(aEventName, aValue,
defer, !nsContentUtils::IsChromeDoc(ownerDoc),
this);
return NS_OK;
}
//----------------------------------------------------------------------
const nsAttrName*
Element::InternalGetAttrNameFromQName(const nsAString& aStr,
nsAutoString* aNameToUse) const
{
MOZ_ASSERT(!aNameToUse || aNameToUse->IsEmpty());
const nsAttrName* val = nullptr;
if (IsHTMLElement() && IsInHTMLDocument()) {
nsAutoString lower;
nsAutoString& outStr = aNameToUse ? *aNameToUse : lower;
nsContentUtils::ASCIIToLower(aStr, outStr);
val = mAttrsAndChildren.GetExistingAttrNameFromQName(outStr);
if (val) {
outStr.Truncate();
}
} else {
val = mAttrsAndChildren.GetExistingAttrNameFromQName(aStr);
if (!val && aNameToUse) {
*aNameToUse = aStr;
}
}
return val;
}
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 or
// if the element is a custom element (because it may have an
// attribute changed callback).
if (*aHasListeners || GetCustomElementData()) {
// 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);
nsAttrValue* preparsedAttrValue = value.GetStoredAttrValue();
if (aNotify) {
nsNodeUtils::AttributeWillChange(this, aNamespaceID, aName, modType,
preparsedAttrValue);
}
// Hold a script blocker while calling ParseAttribute since that can call
// out to id-observers
nsAutoScriptBlocker scriptBlocker;
nsAttrValue attrValue;
if (preparsedAttrValue) {
attrValue.SwapValueWith(*preparsedAttrValue);
}
// Even the value was pre-parsed in BeforeSetAttr, we still need to call
// ParseAttribute because it can have side effects.
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,
&aParsedValue);
}
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 = GetComposedDoc();
mozAutoDocUpdate updateBatch(document, UPDATE_CONTENT_MODEL, aNotify);
nsMutationGuard::DidMutate();
// Copy aParsedValue for later use since it will be lost when we call
// SetAndSwapMappedAttr below
nsAttrValue valueForAfterSetAttr;
if (aCallAfterSetAttr) {
valueForAfterSetAttr.SetTo(aParsedValue);
}
bool hadValidDir = false;
bool hadDirAuto = false;
if (aNamespaceID == kNameSpaceID_None) {
if (aName == nsGkAtoms::dir) {
hadValidDir = HasValidDir() || IsHTMLElement(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.SetAndSwapAttr(aName, aParsedValue);
}
}
else {
nsRefPtr<mozilla::dom::NodeInfo> ni;
ni = mNodeInfo->NodeInfoManager()->GetNodeInfo(aName, aPrefix,
aNamespaceID,
nsIDOMNode::ATTRIBUTE_NODE);
rv = mAttrsAndChildren.SetAndSwapAttr(ni, aParsedValue);
}
// If the old value owns its own data, we know it is OK to keep using it.
const nsAttrValue* oldValue =
aParsedValue.StoresOwnData() ? &aParsedValue : &aOldValue;
NS_ENSURE_SUCCESS(rv, rv);
if (document || HasFlag(NODE_FORCE_XBL_BINDINGS)) {
nsRefPtr<nsXBLBinding> binding = GetXBLBinding();
if (binding) {
binding->AttributeChanged(aName, aNamespaceID, false, aNotify);
}
}
UpdateState(aNotify);
nsIDocument* ownerDoc = OwnerDoc();
if (ownerDoc && GetCustomElementData()) {
nsCOMPtr<nsIAtom> oldValueAtom = oldValue->GetAsAtom();
nsCOMPtr<nsIAtom> newValueAtom = valueForAfterSetAttr.GetAsAtom();
LifecycleCallbackArgs args = {
nsDependentAtomString(aName),
aModType == nsIDOMMutationEvent::ADDITION ?
NullString() : nsDependentAtomString(oldValueAtom),
nsDependentAtomString(newValueAtom)
};
ownerDoc->EnqueueLifecycleCallback(nsIDocument::eAttributeChanged, this, &args);
}
if (aCallAfterSetAttr) {
rv = AfterSetAttr(aNamespaceID, aName, &valueForAfterSetAttr, aNotify);
NS_ENSURE_SUCCESS(rv, rv);
if (aNamespaceID == kNameSpaceID_None && aName == nsGkAtoms::dir) {
OnSetDirAttr(this, &valueForAfterSetAttr,
hadValidDir, hadDirAuto, aNotify);
}
}
if (aNotify) {
// Don't pass aOldValue to AttributeChanged since it may not be reliable.
// Callers only compute aOldValue under certain conditions which may not
// be triggered by all nsIMutationObservers.
nsNodeUtils::AttributeChanged(this, aNamespaceID, aName, aModType,
oldValue == &aParsedValue ? &aParsedValue : nullptr);
}
if (aFireMutation) {
InternalMutationEvent mutation(true, eLegacyAttrModified);
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 (!oldValue->IsEmptyString()) {
mutation.mPrevAttrValue = oldValue->GetAsAtom();
}
mutation.mAttrChange = aModType;
mozAutoSubtreeModified subtree(OwnerDoc(), this);
(new AsyncEventDispatcher(this, mutation))->RunDOMEventWhenSafe();
}
return NS_OK;
}
nsresult
Element::BeforeSetAttr(int32_t aNamespaceID, nsIAtom* aName,
nsAttrValueOrString* aValue, bool aNotify)
{
if (aNamespaceID == kNameSpaceID_None) {
if (aName == nsGkAtoms::_class) {
// aValue->GetAttrValue will only be non-null here when this is called
// via Element::SetParsedAttr. This shouldn't happen for "class", but
// this will handle it.
if (aValue && !aValue->GetAttrValue()) {
nsAttrValue attr;
attr.ParseAtomArray(aValue->String());
aValue->TakeParsedValue(attr);
}
}
}
return NS_OK;
}
bool
Element::ParseAttribute(int32_t aNamespaceID,
nsIAtom* aAttribute,
const nsAString& aValue,
nsAttrValue& aResult)
{
if (aNamespaceID == kNameSpaceID_None) {
if (aAttribute == nsGkAtoms::_class) {
SetFlags(NODE_MAY_HAVE_CLASS);
// Result should have been preparsed above.