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Diffstat (limited to 'dom/html/nsGenericHTMLElement.cpp')
| -rw-r--r-- | dom/html/nsGenericHTMLElement.cpp | 2918 |
1 files changed, 2918 insertions, 0 deletions
diff --git a/dom/html/nsGenericHTMLElement.cpp b/dom/html/nsGenericHTMLElement.cpp new file mode 100644 index 0000000000..55ed8a644d --- /dev/null +++ b/dom/html/nsGenericHTMLElement.cpp @@ -0,0 +1,2918 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "mozilla/ArrayUtils.h" +#include "mozilla/DeclarationBlock.h" +#include "mozilla/EventDispatcher.h" +#include "mozilla/EventListenerManager.h" +#include "mozilla/EventStateManager.h" +#include "mozilla/EventStates.h" +#include "mozilla/HTMLEditor.h" +#include "mozilla/MappedDeclarations.h" +#include "mozilla/Likely.h" +#include "mozilla/MouseEvents.h" +#include "mozilla/PresShell.h" +#include "mozilla/TextEditor.h" +#include "mozilla/StaticPrefs_html5.h" +#include "mozilla/StaticPrefs_layout.h" + +#include "nscore.h" +#include "nsGenericHTMLElement.h" +#include "nsAttrValueInlines.h" +#include "nsCOMPtr.h" +#include "nsAtom.h" +#include "nsQueryObject.h" +#include "nsIContentInlines.h" +#include "mozilla/dom/BindContext.h" +#include "mozilla/dom/Document.h" +#include "nsMappedAttributes.h" +#include "nsHTMLStyleSheet.h" +#include "nsPIDOMWindow.h" +#include "nsEscape.h" +#include "nsIFrameInlines.h" +#include "nsIScrollableFrame.h" +#include "nsView.h" +#include "nsViewManager.h" +#include "nsIWidget.h" +#include "nsRange.h" +#include "nsPresContext.h" +#include "nsNameSpaceManager.h" +#include "nsError.h" +#include "nsIPrincipal.h" +#include "nsContainerFrame.h" +#include "nsStyleUtil.h" +#include "ReferrerInfo.h" + +#include "mozilla/PresState.h" +#include "nsILayoutHistoryState.h" + +#include "nsHTMLParts.h" +#include "nsContentUtils.h" +#include "mozilla/dom/DirectionalityUtils.h" +#include "mozilla/dom/DocumentOrShadowRoot.h" +#include "nsString.h" +#include "nsUnicharUtils.h" +#include "nsGkAtoms.h" +#include "nsDOMCSSDeclaration.h" +#include "nsITextControlFrame.h" +#include "nsIForm.h" +#include "nsIFormControl.h" +#include "mozilla/dom/HTMLFormElement.h" +#include "nsFocusManager.h" +#include "nsAttrValueOrString.h" + +#include "mozilla/InternalMutationEvent.h" +#include "nsDOMStringMap.h" + +#include "nsLayoutUtils.h" +#include "mozAutoDocUpdate.h" +#include "nsHtml5Module.h" +#include "mozilla/dom/ElementInlines.h" +#include "HTMLFieldSetElement.h" +#include "nsTextNode.h" +#include "HTMLBRElement.h" +#include "HTMLMenuElement.h" +#include "nsDOMMutationObserver.h" +#include "mozilla/Preferences.h" +#include "mozilla/dom/FromParser.h" +#include "mozilla/dom/Link.h" +#include "mozilla/BloomFilter.h" +#include "mozilla/dom/ScriptLoader.h" + +#include "nsVariant.h" +#include "nsDOMTokenList.h" +#include "nsThreadUtils.h" +#include "nsTextFragment.h" +#include "mozilla/dom/BindingUtils.h" +#include "mozilla/dom/MouseEventBinding.h" +#include "mozilla/dom/TouchEvent.h" +#include "mozilla/ErrorResult.h" +#include "nsHTMLDocument.h" +#include "nsGlobalWindow.h" +#include "mozilla/dom/HTMLBodyElement.h" +#include "imgIContainer.h" +#include "nsComputedDOMStyle.h" +#include "mozilla/dom/HTMLLabelElement.h" +#include "mozilla/dom/HTMLInputElement.h" +#include "mozilla/dom/CustomElementRegistry.h" +#include "mozilla/dom/ElementInternals.h" + +using namespace mozilla; +using namespace mozilla::dom; + +static const uint8_t NS_INPUTMODE_NONE = 1; +static const uint8_t NS_INPUTMODE_TEXT = 2; +static const uint8_t NS_INPUTMODE_TEL = 3; +static const uint8_t NS_INPUTMODE_URL = 4; +static const uint8_t NS_INPUTMODE_EMAIL = 5; +static const uint8_t NS_INPUTMODE_NUMERIC = 6; +static const uint8_t NS_INPUTMODE_DECIMAL = 7; +static const uint8_t NS_INPUTMODE_SEARCH = 8; + +static const nsAttrValue::EnumTable kInputmodeTable[] = { + {"none", NS_INPUTMODE_NONE}, + {"text", NS_INPUTMODE_TEXT}, + {"tel", NS_INPUTMODE_TEL}, + {"url", NS_INPUTMODE_URL}, + {"email", NS_INPUTMODE_EMAIL}, + {"numeric", NS_INPUTMODE_NUMERIC}, + {"decimal", NS_INPUTMODE_DECIMAL}, + {"search", NS_INPUTMODE_SEARCH}, + {nullptr, 0}}; + +static const uint8_t NS_ENTERKEYHINT_ENTER = 1; +static const uint8_t NS_ENTERKEYHINT_DONE = 2; +static const uint8_t NS_ENTERKEYHINT_GO = 3; +static const uint8_t NS_ENTERKEYHINT_NEXT = 4; +static const uint8_t NS_ENTERKEYHINT_PREVIOUS = 5; +static const uint8_t NS_ENTERKEYHINT_SEARCH = 6; +static const uint8_t NS_ENTERKEYHINT_SEND = 7; + +static const nsAttrValue::EnumTable kEnterKeyHintTable[] = { + {"enter", NS_ENTERKEYHINT_ENTER}, + {"done", NS_ENTERKEYHINT_DONE}, + {"go", NS_ENTERKEYHINT_GO}, + {"next", NS_ENTERKEYHINT_NEXT}, + {"previous", NS_ENTERKEYHINT_PREVIOUS}, + {"search", NS_ENTERKEYHINT_SEARCH}, + {"send", NS_ENTERKEYHINT_SEND}, + {nullptr, 0}}; + +static const uint8_t NS_AUTOCAPITALIZE_NONE = 1; +static const uint8_t NS_AUTOCAPITALIZE_SENTENCES = 2; +static const uint8_t NS_AUTOCAPITALIZE_WORDS = 3; +static const uint8_t NS_AUTOCAPITALIZE_CHARACTERS = 4; + +static const nsAttrValue::EnumTable kAutocapitalizeTable[] = { + {"none", NS_AUTOCAPITALIZE_NONE}, + {"sentences", NS_AUTOCAPITALIZE_SENTENCES}, + {"words", NS_AUTOCAPITALIZE_WORDS}, + {"characters", NS_AUTOCAPITALIZE_CHARACTERS}, + {"off", NS_AUTOCAPITALIZE_NONE}, + {"on", NS_AUTOCAPITALIZE_SENTENCES}, + {"", 0}, + {nullptr, 0}}; + +static const nsAttrValue::EnumTable* kDefaultAutocapitalize = + &kAutocapitalizeTable[1]; + +nsresult nsGenericHTMLElement::CopyInnerTo(Element* aDst) { + MOZ_ASSERT(!aDst->GetUncomposedDoc(), + "Should not CopyInnerTo an Element in a document"); + + auto reparse = aDst->OwnerDoc() == OwnerDoc() ? ReparseAttributes::No + : ReparseAttributes::Yes; + nsresult rv = Element::CopyInnerTo(aDst, reparse); + NS_ENSURE_SUCCESS(rv, rv); + + // cloning a node must retain its internal nonce slot + nsString* nonce = static_cast<nsString*>(GetProperty(nsGkAtoms::nonce)); + if (nonce) { + static_cast<nsGenericHTMLElement*>(aDst)->SetNonce(*nonce); + } + return NS_OK; +} + +static const nsAttrValue::EnumTable kDirTable[] = { + {"ltr", eDir_LTR}, {"rtl", eDir_RTL}, {"auto", eDir_Auto}, {nullptr, 0}}; + +void nsGenericHTMLElement::AddToNameTable(nsAtom* aName) { + MOZ_ASSERT(HasName(), "Node doesn't have name?"); + Document* doc = GetUncomposedDoc(); + if (doc && !IsInNativeAnonymousSubtree()) { + doc->AddToNameTable(this, aName); + } +} + +void nsGenericHTMLElement::RemoveFromNameTable() { + if (HasName() && CanHaveName(NodeInfo()->NameAtom())) { + if (Document* doc = GetUncomposedDoc()) { + doc->RemoveFromNameTable(this, + GetParsedAttr(nsGkAtoms::name)->GetAtomValue()); + } + } +} + +void nsGenericHTMLElement::GetAccessKeyLabel(nsString& aLabel) { + nsAutoString suffix; + GetAccessKey(suffix); + if (!suffix.IsEmpty()) { + EventStateManager::GetAccessKeyLabelPrefix(this, aLabel); + aLabel.Append(suffix); + } +} + +static bool IsOffsetParent(nsIFrame* aFrame) { + LayoutFrameType frameType = aFrame->Type(); + + if (frameType == LayoutFrameType::TableCell || + frameType == LayoutFrameType::Table) { + // Per the IDL for Element, only td, th, and table are acceptable + // offsetParents apart from body or positioned elements; we need to check + // the content type as well as the frame type so we ignore anonymous tables + // created by an element with display: table-cell with no actual table + nsIContent* content = aFrame->GetContent(); + + return content->IsAnyOfHTMLElements(nsGkAtoms::table, nsGkAtoms::td, + nsGkAtoms::th); + } + return false; +} + +struct OffsetResult { + Element* mParent = nullptr; + CSSIntRect mRect; +}; + +static OffsetResult GetUnretargetedOffsetsFor(const Element& aElement) { + nsIFrame* frame = aElement.GetPrimaryFrame(); + if (!frame) { + return {}; + } + + nsIFrame* styleFrame = nsLayoutUtils::GetStyleFrame(frame); + + nsIFrame* parent = frame->GetParent(); + nsPoint origin(0, 0); + + nsIContent* offsetParent = nullptr; + Element* docElement = aElement.GetComposedDoc()->GetRootElement(); + nsIContent* content = frame->GetContent(); + + if (content && + (content->IsHTMLElement(nsGkAtoms::body) || content == docElement)) { + parent = frame; + } else { + const bool isPositioned = styleFrame->IsAbsPosContainingBlock(); + const bool isAbsolutelyPositioned = styleFrame->IsAbsolutelyPositioned(); + origin += frame->GetPositionIgnoringScrolling(); + + for (; parent; parent = parent->GetParent()) { + content = parent->GetContent(); + + // Stop at the first ancestor that is positioned. + if (parent->IsAbsPosContainingBlock()) { + offsetParent = content; + break; + } + + // Add the parent's origin to our own to get to the + // right coordinate system. + const bool isOffsetParent = !isPositioned && IsOffsetParent(parent); + if (!isOffsetParent) { + origin += parent->GetPositionIgnoringScrolling(); + } + + if (content) { + // If we've hit the document element, break here. + if (content == docElement) { + break; + } + + // Break if the ancestor frame type makes it suitable as offset parent + // and this element is *not* positioned or if we found the body element. + if (isOffsetParent || content->IsHTMLElement(nsGkAtoms::body)) { + offsetParent = content; + break; + } + } + } + + if (isAbsolutelyPositioned && !offsetParent) { + // If this element is absolutely positioned, but we don't have + // an offset parent it means this element is an absolutely + // positioned child that's not nested inside another positioned + // element, in this case the element's frame's parent is the + // frame for the HTML element so we fail to find the body in the + // parent chain. We want the offset parent in this case to be + // the body, so we just get the body element from the document. + // + // We use GetBodyElement() here, not GetBody(), because we don't want to + // end up with framesets here. + offsetParent = aElement.GetComposedDoc()->GetBodyElement(); + } + } + + // Make the position relative to the padding edge. + if (parent) { + const nsStyleBorder* border = parent->StyleBorder(); + origin.x -= border->GetComputedBorderWidth(eSideLeft); + origin.y -= border->GetComputedBorderWidth(eSideTop); + } + + // 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. We just have to use something non-null. + nsRect rcFrame = nsLayoutUtils::GetAllInFlowRectsUnion(frame, frame); + rcFrame.MoveTo(origin); + return {Element::FromNodeOrNull(offsetParent), + CSSIntRect::FromAppUnitsRounded(rcFrame)}; +} + +static bool ShouldBeRetargeted(const Element& aReferenceElement, + const Element& aElementToMaybeRetarget) { + ShadowRoot* shadow = aElementToMaybeRetarget.GetContainingShadow(); + if (!shadow) { + return false; + } + for (ShadowRoot* scope = aReferenceElement.GetContainingShadow(); scope; + scope = scope->Host()->GetContainingShadow()) { + if (scope == shadow) { + return false; + } + } + + return true; +} + +Element* nsGenericHTMLElement::GetOffsetRect(CSSIntRect& aRect) { + aRect = CSSIntRect(); + + if (!GetPrimaryFrame(FlushType::Layout)) { + return nullptr; + } + + OffsetResult thisResult = GetUnretargetedOffsetsFor(*this); + aRect = thisResult.mRect; + + Element* parent = thisResult.mParent; + while (parent && ShouldBeRetargeted(*this, *parent)) { + OffsetResult result = GetUnretargetedOffsetsFor(*parent); + aRect += result.mRect.TopLeft(); + parent = result.mParent; + } + + return parent; +} + +bool nsGenericHTMLElement::Spellcheck() { + // Has the state has been explicitly set? + nsIContent* node; + for (node = this; node; node = node->GetParent()) { + if (node->IsHTMLElement()) { + static Element::AttrValuesArray strings[] = {nsGkAtoms::_true, + nsGkAtoms::_false, nullptr}; + switch (node->AsElement()->FindAttrValueIn( + kNameSpaceID_None, nsGkAtoms::spellcheck, strings, eCaseMatters)) { + case 0: // spellcheck = "true" + return true; + case 1: // spellcheck = "false" + return false; + } + } + } + + // contenteditable/designMode are spellchecked by default + if (IsEditable()) { + return true; + } + + // Is this a chrome element? + if (nsContentUtils::IsChromeDoc(OwnerDoc())) { + return false; // Not spellchecked by default + } + + // Anything else that's not a form control is not spellchecked by default + nsCOMPtr<nsIFormControl> formControl = do_QueryObject(this); + if (!formControl) { + return false; // Not spellchecked by default + } + + // Is this a multiline plaintext input? + int32_t controlType = formControl->ControlType(); + if (controlType == NS_FORM_TEXTAREA) { + return true; // Spellchecked by default + } + + // Is this anything other than an input text? + // Other inputs are not spellchecked. + if (controlType != NS_FORM_INPUT_TEXT) { + return false; // Not spellchecked by default + } + + // Does the user want input text spellchecked by default? + // NOTE: Do not reflect a pref value of 0 back to the DOM getter. + // The web page should not know if the user has disabled spellchecking. + // We'll catch this in the editor itself. + int32_t spellcheckLevel = Preferences::GetInt("layout.spellcheckDefault", 1); + return spellcheckLevel == 2; // "Spellcheck multi- and single-line" +} + +bool nsGenericHTMLElement::InNavQuirksMode(Document* aDoc) { + return aDoc && aDoc->GetCompatibilityMode() == eCompatibility_NavQuirks; +} + +void nsGenericHTMLElement::UpdateEditableState(bool aNotify) { + // XXX Should we do this only when in a document? + ContentEditableTristate value = GetContentEditableValue(); + if (value != eInherit) { + DoSetEditableFlag(!!value, aNotify); + return; + } + + nsStyledElement::UpdateEditableState(aNotify); +} + +EventStates nsGenericHTMLElement::IntrinsicState() const { + EventStates state = nsGenericHTMLElementBase::IntrinsicState(); + + if (GetDirectionality() == eDir_RTL) { + state |= NS_EVENT_STATE_RTL; + state &= ~NS_EVENT_STATE_LTR; + } else { // at least for HTML, directionality is exclusively LTR or RTL + NS_ASSERTION(GetDirectionality() == eDir_LTR, + "HTML element's directionality must be either RTL or LTR"); + state |= NS_EVENT_STATE_LTR; + state &= ~NS_EVENT_STATE_RTL; + } + + return state; +} + +nsresult nsGenericHTMLElement::BindToTree(BindContext& aContext, + nsINode& aParent) { + nsresult rv = nsGenericHTMLElementBase::BindToTree(aContext, aParent); + NS_ENSURE_SUCCESS(rv, rv); + + if (IsInUncomposedDoc()) { + RegAccessKey(); + if (HasName() && CanHaveName(NodeInfo()->NameAtom())) { + aContext.OwnerDoc().AddToNameTable( + this, GetParsedAttr(nsGkAtoms::name)->GetAtomValue()); + } + } + + if (HasFlag(NODE_IS_EDITABLE) && GetContentEditableValue() == eTrue && + IsInComposedDoc()) { + aContext.OwnerDoc().ChangeContentEditableCount(this, +1); + } + + // Hide any nonce from the DOM, but keep the internal value of the + // nonce by copying and resetting the internal nonce value. + if (HasFlag(NODE_HAS_NONCE_AND_HEADER_CSP) && IsInComposedDoc() && + OwnerDoc()->GetBrowsingContext()) { + nsContentUtils::AddScriptRunner(NS_NewRunnableFunction( + "nsGenericHTMLElement::ResetNonce::Runnable", + [self = RefPtr<nsGenericHTMLElement>(this)]() { + nsAutoString nonce; + self->GetNonce(nonce); + self->SetAttr(kNameSpaceID_None, nsGkAtoms::nonce, u""_ns, true); + self->SetNonce(nonce); + })); + } + + // We need to consider a labels element is moved to another subtree + // with different root, it needs to update labels list and its root + // as well. + nsExtendedDOMSlots* slots = GetExistingExtendedDOMSlots(); + if (slots && slots->mLabelsList) { + slots->mLabelsList->MaybeResetRoot(SubtreeRoot()); + } + + return rv; +} + +void nsGenericHTMLElement::UnbindFromTree(bool aNullParent) { + if (IsInUncomposedDoc()) { + UnregAccessKey(); + } + + RemoveFromNameTable(); + + if (GetContentEditableValue() == eTrue) { + Document* doc = GetComposedDoc(); + if (doc) { + doc->ChangeContentEditableCount(this, -1); + } + } + + nsStyledElement::UnbindFromTree(aNullParent); + + // Invalidate .labels list. It will be repopulated when used the next time. + nsExtendedDOMSlots* slots = GetExistingExtendedDOMSlots(); + if (slots && slots->mLabelsList) { + slots->mLabelsList->MaybeResetRoot(SubtreeRoot()); + } +} + +HTMLFormElement* nsGenericHTMLElement::FindAncestorForm( + HTMLFormElement* aCurrentForm) { + NS_ASSERTION(!HasAttr(kNameSpaceID_None, nsGkAtoms::form) || + IsHTMLElement(nsGkAtoms::img), + "FindAncestorForm should not be called if @form is set!"); + if (IsInNativeAnonymousSubtree()) { + return nullptr; + } + + nsIContent* content = this; + while (content) { + // If the current ancestor is a form, return it as our form + if (content->IsHTMLElement(nsGkAtoms::form)) { +#ifdef DEBUG + if (!nsContentUtils::IsInSameAnonymousTree(this, content)) { + // It's possible that we started unbinding at |content| or + // some ancestor of it, and |content| and |this| used to all be + // anonymous. Check for this the hard way. + for (nsIContent* child = this; child != content; + child = child->GetParent()) { + NS_ASSERTION(child->GetParent()->ComputeIndexOf(child) != -1, + "Walked too far?"); + } + } +#endif + return static_cast<HTMLFormElement*>(content); + } + + nsIContent* prevContent = content; + content = prevContent->GetParent(); + + if (!content && aCurrentForm) { + // We got to the root of the subtree we're in, and we're being removed + // from the DOM (the only time we get into this method with a non-null + // aCurrentForm). Check whether aCurrentForm is in the same subtree. If + // it is, we want to return aCurrentForm, since this case means that + // we're one of those inputs-in-a-table that have a hacked mForm pointer + // and a subtree containing both us and the form got removed from the + // DOM. + if (aCurrentForm->IsInclusiveDescendantOf(prevContent)) { + return aCurrentForm; + } + } + } + + return nullptr; +} + +bool nsGenericHTMLElement::CheckHandleEventForAnchorsPreconditions( + EventChainVisitor& aVisitor) { + MOZ_ASSERT(nsCOMPtr<Link>(do_QueryObject(this)), + "should be called only when |this| implements |Link|"); + // When disconnected, only <a> should navigate away per + // https://html.spec.whatwg.org/#cannot-navigate + return IsInComposedDoc() || IsHTMLElement(nsGkAtoms::a); +} + +void nsGenericHTMLElement::GetEventTargetParentForAnchors( + EventChainPreVisitor& aVisitor) { + nsGenericHTMLElementBase::GetEventTargetParent(aVisitor); + + if (!CheckHandleEventForAnchorsPreconditions(aVisitor)) { + return; + } + + GetEventTargetParentForLinks(aVisitor); +} + +nsresult nsGenericHTMLElement::PostHandleEventForAnchors( + EventChainPostVisitor& aVisitor) { + if (!CheckHandleEventForAnchorsPreconditions(aVisitor)) { + return NS_OK; + } + + return PostHandleEventForLinks(aVisitor); +} + +bool nsGenericHTMLElement::IsHTMLLink(nsIURI** aURI) const { + MOZ_ASSERT(aURI, "Must provide aURI out param"); + + *aURI = GetHrefURIForAnchors().take(); + // We promise out param is non-null if we return true, so base rv on it + return *aURI != nullptr; +} + +already_AddRefed<nsIURI> nsGenericHTMLElement::GetHrefURIForAnchors() const { + // This is used by the three Link implementations and + // nsHTMLStyleElement. + + // Get href= attribute (relative URI). + + // We use the nsAttrValue's copy of the URI string to avoid copying. + nsCOMPtr<nsIURI> uri; + GetURIAttr(nsGkAtoms::href, nullptr, getter_AddRefs(uri)); + + return uri.forget(); +} + +nsresult nsGenericHTMLElement::BeforeSetAttr(int32_t aNamespaceID, + nsAtom* aName, + const nsAttrValueOrString* aValue, + bool aNotify) { + if (aNamespaceID == kNameSpaceID_None) { + if (aName == nsGkAtoms::accesskey) { + // Have to unregister before clearing flag. See UnregAccessKey + UnregAccessKey(); + if (!aValue) { + UnsetFlags(NODE_HAS_ACCESSKEY); + } + } else if (aName == nsGkAtoms::name) { + // Have to do this before clearing flag. See RemoveFromNameTable + RemoveFromNameTable(); + if (!aValue || aValue->IsEmpty()) { + ClearHasName(); + } + } else if (aName == nsGkAtoms::contenteditable) { + if (aValue) { + // Set this before the attribute is set so that any subclass code that + // runs before the attribute is set won't think we're missing a + // contenteditable attr when we actually have one. + SetMayHaveContentEditableAttr(); + } + } + if (!aValue && IsEventAttributeName(aName)) { + if (EventListenerManager* manager = GetExistingListenerManager()) { + manager->RemoveEventHandler(GetEventNameForAttr(aName)); + } + } + } + + return nsGenericHTMLElementBase::BeforeSetAttr(aNamespaceID, aName, aValue, + aNotify); +} + +nsresult nsGenericHTMLElement::AfterSetAttr( + int32_t aNamespaceID, nsAtom* aName, const nsAttrValue* aValue, + const nsAttrValue* aOldValue, nsIPrincipal* aMaybeScriptedPrincipal, + bool aNotify) { + if (aNamespaceID == kNameSpaceID_None) { + if (IsEventAttributeName(aName) && aValue) { + MOZ_ASSERT(aValue->Type() == nsAttrValue::eString, + "Expected string value for script body"); + SetEventHandler(GetEventNameForAttr(aName), aValue->GetStringValue()); + } else if (aNotify && aName == nsGkAtoms::spellcheck) { + SyncEditorsOnSubtree(this); + } else if (aName == nsGkAtoms::dir) { + Directionality dir = eDir_LTR; + // A boolean tracking whether we need to recompute our directionality. + // This needs to happen after we update our internal "dir" attribute + // state but before we call SetDirectionalityOnDescendants. + bool recomputeDirectionality = false; + // We don't want to have to keep getting the "dir" attribute in + // IntrinsicState, so we manually recompute our dir-related event states + // here and send the relevant update notifications. + EventStates dirStates; + if (aValue && aValue->Type() == nsAttrValue::eEnum) { + SetHasValidDir(); + dirStates |= NS_EVENT_STATE_HAS_DIR_ATTR; + Directionality dirValue = (Directionality)aValue->GetEnumValue(); + if (dirValue == eDir_Auto) { + dirStates |= NS_EVENT_STATE_DIR_ATTR_LIKE_AUTO; + } else { + dir = dirValue; + SetDirectionality(dir, aNotify); + if (dirValue == eDir_LTR) { + dirStates |= NS_EVENT_STATE_DIR_ATTR_LTR; + } else { + MOZ_ASSERT(dirValue == eDir_RTL); + dirStates |= NS_EVENT_STATE_DIR_ATTR_RTL; + } + } + } else { + if (aValue) { + // We have a value, just not a valid one. + dirStates |= NS_EVENT_STATE_HAS_DIR_ATTR; + } + ClearHasValidDir(); + if (NodeInfo()->Equals(nsGkAtoms::bdi)) { + dirStates |= NS_EVENT_STATE_DIR_ATTR_LIKE_AUTO; + } else { + recomputeDirectionality = true; + } + } + // Now figure out what's changed about our dir states. + EventStates oldDirStates = State() & DIR_ATTR_STATES; + EventStates changedStates = dirStates ^ oldDirStates; + ToggleStates(changedStates, aNotify); + if (recomputeDirectionality) { + dir = RecomputeDirectionality(this, aNotify); + } + SetDirectionalityOnDescendants(this, dir, aNotify); + } else if (aName == nsGkAtoms::contenteditable) { + int32_t editableCountDelta = 0; + if (aOldValue && (aOldValue->Equals(u"true"_ns, eIgnoreCase) || + aOldValue->Equals(u""_ns, eIgnoreCase))) { + editableCountDelta = -1; + } + if (aValue && (aValue->Equals(u"true"_ns, eIgnoreCase) || + aValue->Equals(u""_ns, eIgnoreCase))) { + ++editableCountDelta; + } + ChangeEditableState(editableCountDelta); + } else if (aName == nsGkAtoms::accesskey) { + if (aValue && !aValue->Equals(u""_ns, eIgnoreCase)) { + SetFlags(NODE_HAS_ACCESSKEY); + RegAccessKey(); + } + } else if (aName == nsGkAtoms::inert && + StaticPrefs::html5_inert_enabled()) { + if (aValue) { + AddStates(NS_EVENT_STATE_MOZINERT); + } else { + RemoveStates(NS_EVENT_STATE_MOZINERT); + } + } else if (aName == nsGkAtoms::name) { + if (aValue && !aValue->Equals(u""_ns, eIgnoreCase)) { + // This may not be quite right because we can have subclass code run + // before here. But in practice subclasses don't care about this flag, + // and in particular selector matching does not care. Otherwise we'd + // want to handle it like we handle id attributes (in PreIdMaybeChange + // and PostIdMaybeChange). + SetHasName(); + if (CanHaveName(NodeInfo()->NameAtom())) { + AddToNameTable(aValue->GetAtomValue()); + } + } + } + + // The nonce will be copied over to an internal slot and cleared from the + // Element within BindToTree to avoid CSS Selector nonce exfiltration if + // the CSP list contains a header-delivered CSP. + if (nsGkAtoms::nonce == aName) { + if (aValue) { + SetNonce(aValue->GetStringValue()); + if (OwnerDoc()->GetHasCSPDeliveredThroughHeader()) { + SetFlags(NODE_HAS_NONCE_AND_HEADER_CSP); + } + } else { + RemoveNonce(); + } + } + } + + return nsGenericHTMLElementBase::AfterSetAttr( + aNamespaceID, aName, aValue, aOldValue, aMaybeScriptedPrincipal, aNotify); +} + +EventListenerManager* nsGenericHTMLElement::GetEventListenerManagerForAttr( + nsAtom* aAttrName, bool* aDefer) { + // Attributes on the body and frameset tags get set on the global object + if ((mNodeInfo->Equals(nsGkAtoms::body) || + mNodeInfo->Equals(nsGkAtoms::frameset)) && + // We only forward some event attributes from body/frameset to window + (0 +#define EVENT(name_, id_, type_, struct_) /* nothing */ +#define FORWARDED_EVENT(name_, id_, type_, struct_) \ + || nsGkAtoms::on##name_ == aAttrName +#define WINDOW_EVENT FORWARDED_EVENT +#include "mozilla/EventNameList.h" // IWYU pragma: keep +#undef WINDOW_EVENT +#undef FORWARDED_EVENT +#undef EVENT + )) { + nsPIDOMWindowInner* win; + + // If we have a document, and it has a window, add the event + // listener on the window (the inner window). If not, proceed as + // normal. + // XXXbz sXBL/XBL2 issue: should we instead use GetComposedDoc() here, + // override BindToTree for those classes and munge event listeners there? + Document* document = OwnerDoc(); + + *aDefer = false; + if ((win = document->GetInnerWindow())) { + nsCOMPtr<EventTarget> piTarget(do_QueryInterface(win)); + + return piTarget->GetOrCreateListenerManager(); + } + + return nullptr; + } + + return nsGenericHTMLElementBase::GetEventListenerManagerForAttr(aAttrName, + aDefer); +} + +#define EVENT(name_, id_, type_, struct_) /* nothing; handled by nsINode */ +#define FORWARDED_EVENT(name_, id_, type_, struct_) \ + EventHandlerNonNull* nsGenericHTMLElement::GetOn##name_() { \ + if (IsAnyOfHTMLElements(nsGkAtoms::body, nsGkAtoms::frameset)) { \ + /* XXXbz note to self: add tests for this! */ \ + if (nsPIDOMWindowInner* win = OwnerDoc()->GetInnerWindow()) { \ + nsGlobalWindowInner* globalWin = nsGlobalWindowInner::Cast(win); \ + return globalWin->GetOn##name_(); \ + } \ + return nullptr; \ + } \ + \ + return nsINode::GetOn##name_(); \ + } \ + void nsGenericHTMLElement::SetOn##name_(EventHandlerNonNull* handler) { \ + if (IsAnyOfHTMLElements(nsGkAtoms::body, nsGkAtoms::frameset)) { \ + nsPIDOMWindowInner* win = OwnerDoc()->GetInnerWindow(); \ + if (!win) { \ + return; \ + } \ + \ + nsGlobalWindowInner* globalWin = nsGlobalWindowInner::Cast(win); \ + return globalWin->SetOn##name_(handler); \ + } \ + \ + return nsINode::SetOn##name_(handler); \ + } +#define ERROR_EVENT(name_, id_, type_, struct_) \ + already_AddRefed<EventHandlerNonNull> nsGenericHTMLElement::GetOn##name_() { \ + if (IsAnyOfHTMLElements(nsGkAtoms::body, nsGkAtoms::frameset)) { \ + /* XXXbz note to self: add tests for this! */ \ + if (nsPIDOMWindowInner* win = OwnerDoc()->GetInnerWindow()) { \ + nsGlobalWindowInner* globalWin = nsGlobalWindowInner::Cast(win); \ + OnErrorEventHandlerNonNull* errorHandler = globalWin->GetOn##name_(); \ + if (errorHandler) { \ + RefPtr<EventHandlerNonNull> handler = \ + new EventHandlerNonNull(errorHandler); \ + return handler.forget(); \ + } \ + } \ + return nullptr; \ + } \ + \ + RefPtr<EventHandlerNonNull> handler = nsINode::GetOn##name_(); \ + return handler.forget(); \ + } \ + void nsGenericHTMLElement::SetOn##name_(EventHandlerNonNull* handler) { \ + if (IsAnyOfHTMLElements(nsGkAtoms::body, nsGkAtoms::frameset)) { \ + nsPIDOMWindowInner* win = OwnerDoc()->GetInnerWindow(); \ + if (!win) { \ + return; \ + } \ + \ + nsGlobalWindowInner* globalWin = nsGlobalWindowInner::Cast(win); \ + RefPtr<OnErrorEventHandlerNonNull> errorHandler; \ + if (handler) { \ + errorHandler = new OnErrorEventHandlerNonNull(handler); \ + } \ + return globalWin->SetOn##name_(errorHandler); \ + } \ + \ + return nsINode::SetOn##name_(handler); \ + } +#include "mozilla/EventNameList.h" // IWYU pragma: keep +#undef ERROR_EVENT +#undef FORWARDED_EVENT +#undef EVENT + +void nsGenericHTMLElement::GetBaseTarget(nsAString& aBaseTarget) const { + OwnerDoc()->GetBaseTarget(aBaseTarget); +} + +//---------------------------------------------------------------------- + +bool nsGenericHTMLElement::ParseAttribute(int32_t aNamespaceID, + nsAtom* aAttribute, + const nsAString& aValue, + nsIPrincipal* aMaybeScriptedPrincipal, + nsAttrValue& aResult) { + if (aNamespaceID == kNameSpaceID_None) { + if (aAttribute == nsGkAtoms::dir) { + return aResult.ParseEnumValue(aValue, kDirTable, false); + } + + if (aAttribute == nsGkAtoms::tabindex) { + return aResult.ParseIntValue(aValue); + } + + if (aAttribute == nsGkAtoms::referrerpolicy) { + return ParseReferrerAttribute(aValue, aResult); + } + + if (aAttribute == nsGkAtoms::name) { + // Store name as an atom. name="" means that the element has no name, + // not that it has an empty string as the name. + if (aValue.IsEmpty()) { + return false; + } + aResult.ParseAtom(aValue); + return true; + } + + if (aAttribute == nsGkAtoms::contenteditable) { + aResult.ParseAtom(aValue); + return true; + } + + if (aAttribute == nsGkAtoms::rel) { + aResult.ParseAtomArray(aValue); + return true; + } + + if (aAttribute == nsGkAtoms::inputmode) { + return aResult.ParseEnumValue(aValue, kInputmodeTable, false); + } + + if (aAttribute == nsGkAtoms::enterkeyhint) { + return aResult.ParseEnumValue(aValue, kEnterKeyHintTable, false); + } + + if (aAttribute == nsGkAtoms::autocapitalize) { + return aResult.ParseEnumValue(aValue, kAutocapitalizeTable, false); + } + } + + return nsGenericHTMLElementBase::ParseAttribute( + aNamespaceID, aAttribute, aValue, aMaybeScriptedPrincipal, aResult); +} + +bool nsGenericHTMLElement::ParseBackgroundAttribute(int32_t aNamespaceID, + nsAtom* aAttribute, + const nsAString& aValue, + nsAttrValue& aResult) { + if (aNamespaceID == kNameSpaceID_None && + aAttribute == nsGkAtoms::background && !aValue.IsEmpty()) { + // Resolve url to an absolute url + Document* doc = OwnerDoc(); + nsCOMPtr<nsIURI> uri; + nsresult rv = nsContentUtils::NewURIWithDocumentCharset( + getter_AddRefs(uri), aValue, doc, GetBaseURI()); + if (NS_FAILED(rv)) { + return false; + } + aResult.SetTo(uri, &aValue); + return true; + } + + return false; +} + +bool nsGenericHTMLElement::IsAttributeMapped(const nsAtom* aAttribute) const { + static const MappedAttributeEntry* const map[] = {sCommonAttributeMap}; + + return FindAttributeDependence(aAttribute, map); +} + +nsMapRuleToAttributesFunc nsGenericHTMLElement::GetAttributeMappingFunction() + const { + return &MapCommonAttributesInto; +} + +nsIFormControlFrame* nsGenericHTMLElement::GetFormControlFrame( + bool aFlushFrames) { + auto flushType = aFlushFrames ? FlushType::Frames : FlushType::None; + nsIFrame* frame = GetPrimaryFrame(flushType); + if (!frame) { + return nullptr; + } + + if (nsIFormControlFrame* f = do_QueryFrame(frame)) { + return f; + } + + // If we have generated content, the primary frame will be a wrapper frame... + // Our real frame will be in its child list. + // + // FIXME(emilio): I don't think that's true... See bug 155957 for test-cases + // though, we should figure out whether this is still needed. + for (nsIFrame* kid : frame->PrincipalChildList()) { + if (nsIFormControlFrame* f = do_QueryFrame(kid)) { + return f; + } + } + + return nullptr; +} + +static const nsAttrValue::EnumTable kDivAlignTable[] = { + {"left", StyleTextAlign::MozLeft}, + {"right", StyleTextAlign::MozRight}, + {"center", StyleTextAlign::MozCenter}, + {"middle", StyleTextAlign::MozCenter}, + {"justify", StyleTextAlign::Justify}, + {nullptr, 0}}; + +static const nsAttrValue::EnumTable kFrameborderTable[] = { + {"yes", NS_STYLE_FRAME_YES}, + {"no", NS_STYLE_FRAME_NO}, + {"1", NS_STYLE_FRAME_1}, + {"0", NS_STYLE_FRAME_0}, + {nullptr, 0}}; + +// TODO(emilio): Nobody uses the parsed attribute here. +static const nsAttrValue::EnumTable kScrollingTable[] = { + {"yes", NS_STYLE_FRAME_YES}, {"no", NS_STYLE_FRAME_NO}, + {"on", NS_STYLE_FRAME_ON}, {"off", NS_STYLE_FRAME_OFF}, + {"scroll", NS_STYLE_FRAME_SCROLL}, {"noscroll", NS_STYLE_FRAME_NOSCROLL}, + {"auto", NS_STYLE_FRAME_AUTO}, {nullptr, 0}}; + +static const nsAttrValue::EnumTable kTableVAlignTable[] = { + {"top", StyleVerticalAlignKeyword::Top}, + {"middle", StyleVerticalAlignKeyword::Middle}, + {"bottom", StyleVerticalAlignKeyword::Bottom}, + {"baseline", StyleVerticalAlignKeyword::Baseline}, + {nullptr, 0}}; + +bool nsGenericHTMLElement::ParseAlignValue(const nsAString& aString, + nsAttrValue& aResult) { + static const nsAttrValue::EnumTable kAlignTable[] = { + {"left", StyleTextAlign::Left}, + {"right", StyleTextAlign::Right}, + + {"top", StyleVerticalAlignKeyword::Top}, + {"middle", StyleVerticalAlignKeyword::MozMiddleWithBaseline}, + + // Intentionally not bottom. + {"bottom", StyleVerticalAlignKeyword::Baseline}, + + {"center", StyleVerticalAlignKeyword::MozMiddleWithBaseline}, + {"baseline", StyleVerticalAlignKeyword::Baseline}, + + {"texttop", StyleVerticalAlignKeyword::TextTop}, + {"absmiddle", StyleVerticalAlignKeyword::Middle}, + {"abscenter", StyleVerticalAlignKeyword::Middle}, + {"absbottom", StyleVerticalAlignKeyword::Bottom}, + {nullptr, 0}}; + + static_assert(uint8_t(StyleTextAlign::Left) != + uint8_t(StyleVerticalAlignKeyword::Top) && + uint8_t(StyleTextAlign::Left) != + uint8_t(StyleVerticalAlignKeyword::MozMiddleWithBaseline) && + uint8_t(StyleTextAlign::Left) != + uint8_t(StyleVerticalAlignKeyword::Baseline) && + uint8_t(StyleTextAlign::Left) != + uint8_t(StyleVerticalAlignKeyword::TextTop) && + uint8_t(StyleTextAlign::Left) != + uint8_t(StyleVerticalAlignKeyword::Middle) && + uint8_t(StyleTextAlign::Left) != + uint8_t(StyleVerticalAlignKeyword::Bottom)); + + static_assert(uint8_t(StyleTextAlign::Right) != + uint8_t(StyleVerticalAlignKeyword::Top) && + uint8_t(StyleTextAlign::Right) != + uint8_t(StyleVerticalAlignKeyword::MozMiddleWithBaseline) && + uint8_t(StyleTextAlign::Right) != + uint8_t(StyleVerticalAlignKeyword::Baseline) && + uint8_t(StyleTextAlign::Right) != + uint8_t(StyleVerticalAlignKeyword::TextTop) && + uint8_t(StyleTextAlign::Right) != + uint8_t(StyleVerticalAlignKeyword::Middle) && + uint8_t(StyleTextAlign::Right) != + uint8_t(StyleVerticalAlignKeyword::Bottom)); + + return aResult.ParseEnumValue(aString, kAlignTable, false); +} + +//---------------------------------------- + +static const nsAttrValue::EnumTable kTableHAlignTable[] = { + {"left", StyleTextAlign::Left}, {"right", StyleTextAlign::Right}, + {"center", StyleTextAlign::Center}, {"char", StyleTextAlign::Char}, + {"justify", StyleTextAlign::Justify}, {nullptr, 0}}; + +bool nsGenericHTMLElement::ParseTableHAlignValue(const nsAString& aString, + nsAttrValue& aResult) { + return aResult.ParseEnumValue(aString, kTableHAlignTable, false); +} + +//---------------------------------------- + +// This table is used for td, th, tr, col, thead, tbody and tfoot. +static const nsAttrValue::EnumTable kTableCellHAlignTable[] = { + {"left", StyleTextAlign::MozLeft}, + {"right", StyleTextAlign::MozRight}, + {"center", StyleTextAlign::MozCenter}, + {"char", StyleTextAlign::Char}, + {"justify", StyleTextAlign::Justify}, + {"middle", StyleTextAlign::MozCenter}, + {"absmiddle", StyleTextAlign::Center}, + {nullptr, 0}}; + +bool nsGenericHTMLElement::ParseTableCellHAlignValue(const nsAString& aString, + nsAttrValue& aResult) { + return aResult.ParseEnumValue(aString, kTableCellHAlignTable, false); +} + +//---------------------------------------- + +bool nsGenericHTMLElement::ParseTableVAlignValue(const nsAString& aString, + nsAttrValue& aResult) { + return aResult.ParseEnumValue(aString, kTableVAlignTable, false); +} + +bool nsGenericHTMLElement::ParseDivAlignValue(const nsAString& aString, + nsAttrValue& aResult) { + return aResult.ParseEnumValue(aString, kDivAlignTable, false); +} + +bool nsGenericHTMLElement::ParseImageAttribute(nsAtom* aAttribute, + const nsAString& aString, + nsAttrValue& aResult) { + if (aAttribute == nsGkAtoms::width || aAttribute == nsGkAtoms::height || + aAttribute == nsGkAtoms::hspace || aAttribute == nsGkAtoms::vspace) { + return aResult.ParseHTMLDimension(aString); + } + if (aAttribute == nsGkAtoms::border) { + return aResult.ParseNonNegativeIntValue(aString); + } + return false; +} + +bool nsGenericHTMLElement::ParseReferrerAttribute(const nsAString& aString, + nsAttrValue& aResult) { + using mozilla::dom::ReferrerInfo; + static const nsAttrValue::EnumTable kReferrerPolicyTable[] = { + {ReferrerInfo::ReferrerPolicyToString(ReferrerPolicy::No_referrer), + static_cast<int16_t>(ReferrerPolicy::No_referrer)}, + {ReferrerInfo::ReferrerPolicyToString(ReferrerPolicy::Origin), + static_cast<int16_t>(ReferrerPolicy::Origin)}, + {ReferrerInfo::ReferrerPolicyToString( + ReferrerPolicy::Origin_when_cross_origin), + static_cast<int16_t>(ReferrerPolicy::Origin_when_cross_origin)}, + {ReferrerInfo::ReferrerPolicyToString( + ReferrerPolicy::No_referrer_when_downgrade), + static_cast<int16_t>(ReferrerPolicy::No_referrer_when_downgrade)}, + {ReferrerInfo::ReferrerPolicyToString(ReferrerPolicy::Unsafe_url), + static_cast<int16_t>(ReferrerPolicy::Unsafe_url)}, + {ReferrerInfo::ReferrerPolicyToString(ReferrerPolicy::Strict_origin), + static_cast<int16_t>(ReferrerPolicy::Strict_origin)}, + {ReferrerInfo::ReferrerPolicyToString(ReferrerPolicy::Same_origin), + static_cast<int16_t>(ReferrerPolicy::Same_origin)}, + {ReferrerInfo::ReferrerPolicyToString( + ReferrerPolicy::Strict_origin_when_cross_origin), + static_cast<int16_t>(ReferrerPolicy::Strict_origin_when_cross_origin)}, + {nullptr, ReferrerPolicy::_empty}}; + return aResult.ParseEnumValue(aString, kReferrerPolicyTable, false); +} + +bool nsGenericHTMLElement::ParseFrameborderValue(const nsAString& aString, + nsAttrValue& aResult) { + return aResult.ParseEnumValue(aString, kFrameborderTable, false); +} + +bool nsGenericHTMLElement::ParseScrollingValue(const nsAString& aString, + nsAttrValue& aResult) { + return aResult.ParseEnumValue(aString, kScrollingTable, false); +} + +static inline void MapLangAttributeInto(const nsMappedAttributes* aAttributes, + MappedDeclarations& aDecls) { + const nsAttrValue* langValue = aAttributes->GetAttr(nsGkAtoms::lang); + if (!langValue) { + return; + } + MOZ_ASSERT(langValue->Type() == nsAttrValue::eAtom); + aDecls.SetIdentAtomValueIfUnset(eCSSProperty__x_lang, + langValue->GetAtomValue()); + if (!aDecls.PropertyIsSet(eCSSProperty_text_emphasis_position)) { + const nsAtom* lang = langValue->GetAtomValue(); + if (nsStyleUtil::MatchesLanguagePrefix(lang, u"zh")) { + aDecls.SetKeywordValue(eCSSProperty_text_emphasis_position, + NS_STYLE_TEXT_EMPHASIS_POSITION_DEFAULT_ZH); + } else if (nsStyleUtil::MatchesLanguagePrefix(lang, u"ja") || + nsStyleUtil::MatchesLanguagePrefix(lang, u"mn")) { + // This branch is currently no part of the spec. + // See bug 1040668 comment 69 and comment 75. + aDecls.SetKeywordValue(eCSSProperty_text_emphasis_position, + NS_STYLE_TEXT_EMPHASIS_POSITION_DEFAULT); + } + } +} + +/** + * Handle attributes common to all html elements + */ +void nsGenericHTMLElement::MapCommonAttributesIntoExceptHidden( + const nsMappedAttributes* aAttributes, MappedDeclarations& aDecls) { + if (!aDecls.PropertyIsSet(eCSSProperty__moz_user_modify)) { + const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::contenteditable); + if (value) { + if (value->Equals(nsGkAtoms::_empty, eCaseMatters) || + value->Equals(nsGkAtoms::_true, eIgnoreCase)) { + aDecls.SetKeywordValue(eCSSProperty__moz_user_modify, + StyleUserModify::ReadWrite); + } else if (value->Equals(nsGkAtoms::_false, eIgnoreCase)) { + aDecls.SetKeywordValue(eCSSProperty__moz_user_modify, + StyleUserModify::ReadOnly); + } + } + } + + MapLangAttributeInto(aAttributes, aDecls); +} + +void nsGenericHTMLElement::MapCommonAttributesInto( + const nsMappedAttributes* aAttributes, MappedDeclarations& aDecls) { + MapCommonAttributesIntoExceptHidden(aAttributes, aDecls); + + if (!aDecls.PropertyIsSet(eCSSProperty_display)) { + if (aAttributes->IndexOfAttr(nsGkAtoms::hidden) >= 0) { + aDecls.SetKeywordValue(eCSSProperty_display, StyleDisplay::None); + } + } +} + +/* static */ +const nsGenericHTMLElement::MappedAttributeEntry + nsGenericHTMLElement::sCommonAttributeMap[] = {{nsGkAtoms::contenteditable}, + {nsGkAtoms::lang}, + {nsGkAtoms::hidden}, + {nullptr}}; + +/* static */ +const Element::MappedAttributeEntry + nsGenericHTMLElement::sImageMarginSizeAttributeMap[] = {{nsGkAtoms::width}, + {nsGkAtoms::height}, + {nsGkAtoms::hspace}, + {nsGkAtoms::vspace}, + {nullptr}}; + +/* static */ +const Element::MappedAttributeEntry + nsGenericHTMLElement::sImageAlignAttributeMap[] = {{nsGkAtoms::align}, + {nullptr}}; + +/* static */ +const Element::MappedAttributeEntry + nsGenericHTMLElement::sDivAlignAttributeMap[] = {{nsGkAtoms::align}, + {nullptr}}; + +/* static */ +const Element::MappedAttributeEntry + nsGenericHTMLElement::sImageBorderAttributeMap[] = {{nsGkAtoms::border}, + {nullptr}}; + +/* static */ +const Element::MappedAttributeEntry + nsGenericHTMLElement::sBackgroundAttributeMap[] = { + {nsGkAtoms::background}, {nsGkAtoms::bgcolor}, {nullptr}}; + +/* static */ +const Element::MappedAttributeEntry + nsGenericHTMLElement::sBackgroundColorAttributeMap[] = { + {nsGkAtoms::bgcolor}, {nullptr}}; + +void nsGenericHTMLElement::MapImageAlignAttributeInto( + const nsMappedAttributes* aAttributes, MappedDeclarations& aDecls) { + const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::align); + if (value && value->Type() == nsAttrValue::eEnum) { + int32_t align = value->GetEnumValue(); + if (!aDecls.PropertyIsSet(eCSSProperty_float)) { + if (align == uint8_t(StyleTextAlign::Left)) { + aDecls.SetKeywordValue(eCSSProperty_float, StyleFloat::Left); + } else if (align == uint8_t(StyleTextAlign::Right)) { + aDecls.SetKeywordValue(eCSSProperty_float, StyleFloat::Right); + } + } + if (!aDecls.PropertyIsSet(eCSSProperty_vertical_align)) { + switch (align) { + case uint8_t(StyleTextAlign::Left): + case uint8_t(StyleTextAlign::Right): + break; + default: + aDecls.SetKeywordValue(eCSSProperty_vertical_align, align); + break; + } + } + } +} + +void nsGenericHTMLElement::MapDivAlignAttributeInto( + const nsMappedAttributes* aAttributes, MappedDeclarations& aDecls) { + if (!aDecls.PropertyIsSet(eCSSProperty_text_align)) { + // align: enum + const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::align); + if (value && value->Type() == nsAttrValue::eEnum) + aDecls.SetKeywordValue(eCSSProperty_text_align, value->GetEnumValue()); + } +} + +void nsGenericHTMLElement::MapVAlignAttributeInto( + const nsMappedAttributes* aAttributes, MappedDeclarations& aDecls) { + if (!aDecls.PropertyIsSet(eCSSProperty_vertical_align)) { + // align: enum + const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::valign); + if (value && value->Type() == nsAttrValue::eEnum) + aDecls.SetKeywordValue(eCSSProperty_vertical_align, + value->GetEnumValue()); + } +} + +static void MapDimensionAttributeInto(MappedDeclarations& aDecls, + nsCSSPropertyID aProp, + const nsAttrValue& aValue) { + MOZ_ASSERT(!aDecls.PropertyIsSet(aProp), + "Why mapping the same property twice?"); + if (aValue.Type() == nsAttrValue::eInteger) { + return aDecls.SetPixelValue(aProp, aValue.GetIntegerValue()); + } + if (aValue.Type() == nsAttrValue::ePercent) { + return aDecls.SetPercentValue(aProp, aValue.GetPercentValue()); + } + if (aValue.Type() == nsAttrValue::eDoubleValue) { + return aDecls.SetPixelValue(aProp, aValue.GetDoubleValue()); + } +} + +void nsGenericHTMLElement::MapImageMarginAttributeInto( + const nsMappedAttributes* aAttributes, MappedDeclarations& aDecls) { + const nsAttrValue* value; + + // hspace: value + value = aAttributes->GetAttr(nsGkAtoms::hspace); + if (value) { + MapDimensionAttributeInto(aDecls, eCSSProperty_margin_left, *value); + MapDimensionAttributeInto(aDecls, eCSSProperty_margin_right, *value); + } + + // vspace: value + value = aAttributes->GetAttr(nsGkAtoms::vspace); + if (value) { + MapDimensionAttributeInto(aDecls, eCSSProperty_margin_top, *value); + MapDimensionAttributeInto(aDecls, eCSSProperty_margin_bottom, *value); + } +} + +void nsGenericHTMLElement::MapWidthAttributeInto( + const nsMappedAttributes* aAttributes, MappedDeclarations& aDecls) { + if (const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::width)) { + MapDimensionAttributeInto(aDecls, eCSSProperty_width, *value); + } +} + +void nsGenericHTMLElement::MapHeightAttributeInto( + const nsMappedAttributes* aAttributes, MappedDeclarations& aDecls) { + if (const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::height)) { + MapDimensionAttributeInto(aDecls, eCSSProperty_height, *value); + } +} + +void nsGenericHTMLElement::MapImageSizeAttributesInto( + const nsMappedAttributes* aAttributes, MappedDeclarations& aDecls, + MapAspectRatio aMapAspectRatio) { + auto* width = aAttributes->GetAttr(nsGkAtoms::width); + auto* height = aAttributes->GetAttr(nsGkAtoms::height); + if (width) { + MapDimensionAttributeInto(aDecls, eCSSProperty_width, *width); + } + if (height) { + MapDimensionAttributeInto(aDecls, eCSSProperty_height, *height); + } + if (StaticPrefs::layout_css_width_and_height_map_to_aspect_ratio_enabled() && + aMapAspectRatio == MapAspectRatio::Yes && width && height) { + Maybe<double> w; + if (width->Type() == nsAttrValue::eInteger) { + w.emplace(width->GetIntegerValue()); + } else if (width->Type() == nsAttrValue::eDoubleValue) { + w.emplace(width->GetDoubleValue()); + } + + Maybe<double> h; + if (height->Type() == nsAttrValue::eInteger) { + h.emplace(height->GetIntegerValue()); + } else if (height->Type() == nsAttrValue::eDoubleValue) { + h.emplace(height->GetDoubleValue()); + } + + if (w && h && *w != 0 && *h != 0) { + aDecls.SetAspectRatio(*w, *h); + } + } +} + +void nsGenericHTMLElement::MapImageBorderAttributeInto( + const nsMappedAttributes* aAttributes, MappedDeclarations& aDecls) { + // border: pixels + const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::border); + if (!value) return; + + nscoord val = 0; + if (value->Type() == nsAttrValue::eInteger) val = value->GetIntegerValue(); + + aDecls.SetPixelValueIfUnset(eCSSProperty_border_top_width, (float)val); + aDecls.SetPixelValueIfUnset(eCSSProperty_border_right_width, (float)val); + aDecls.SetPixelValueIfUnset(eCSSProperty_border_bottom_width, (float)val); + aDecls.SetPixelValueIfUnset(eCSSProperty_border_left_width, (float)val); + + aDecls.SetKeywordValueIfUnset(eCSSProperty_border_top_style, + StyleBorderStyle::Solid); + aDecls.SetKeywordValueIfUnset(eCSSProperty_border_right_style, + StyleBorderStyle::Solid); + aDecls.SetKeywordValueIfUnset(eCSSProperty_border_bottom_style, + StyleBorderStyle::Solid); + aDecls.SetKeywordValueIfUnset(eCSSProperty_border_left_style, + StyleBorderStyle::Solid); + + aDecls.SetCurrentColorIfUnset(eCSSProperty_border_top_color); + aDecls.SetCurrentColorIfUnset(eCSSProperty_border_right_color); + aDecls.SetCurrentColorIfUnset(eCSSProperty_border_bottom_color); + aDecls.SetCurrentColorIfUnset(eCSSProperty_border_left_color); +} + +void nsGenericHTMLElement::MapBackgroundInto( + const nsMappedAttributes* aAttributes, MappedDeclarations& aDecls) { + if (!aDecls.PropertyIsSet(eCSSProperty_background_image)) { + // background + nsAttrValue* value = + const_cast<nsAttrValue*>(aAttributes->GetAttr(nsGkAtoms::background)); + if (value) { + aDecls.SetBackgroundImage(*value); + } + } +} + +void nsGenericHTMLElement::MapBGColorInto(const nsMappedAttributes* aAttributes, + MappedDeclarations& aDecls) { + if (!aDecls.PropertyIsSet(eCSSProperty_background_color)) { + const nsAttrValue* value = aAttributes->GetAttr(nsGkAtoms::bgcolor); + nscolor color; + if (value && value->GetColorValue(color)) { + aDecls.SetColorValue(eCSSProperty_background_color, color); + } + } +} + +void nsGenericHTMLElement::MapBackgroundAttributesInto( + const nsMappedAttributes* aAttributes, MappedDeclarations& aDecls) { + MapBackgroundInto(aAttributes, aDecls); + MapBGColorInto(aAttributes, aDecls); +} + +//---------------------------------------------------------------------- + +int32_t nsGenericHTMLElement::GetIntAttr(nsAtom* aAttr, + int32_t aDefault) const { + const nsAttrValue* attrVal = mAttrs.GetAttr(aAttr); + if (attrVal && attrVal->Type() == nsAttrValue::eInteger) { + return attrVal->GetIntegerValue(); + } + return aDefault; +} + +nsresult nsGenericHTMLElement::SetIntAttr(nsAtom* aAttr, int32_t aValue) { + nsAutoString value; + value.AppendInt(aValue); + + return SetAttr(kNameSpaceID_None, aAttr, value, true); +} + +uint32_t nsGenericHTMLElement::GetUnsignedIntAttr(nsAtom* aAttr, + uint32_t aDefault) const { + const nsAttrValue* attrVal = mAttrs.GetAttr(aAttr); + if (!attrVal || attrVal->Type() != nsAttrValue::eInteger) { + return aDefault; + } + + return attrVal->GetIntegerValue(); +} + +uint32_t nsGenericHTMLElement::GetDimensionAttrAsUnsignedInt( + nsAtom* aAttr, uint32_t aDefault) const { + const nsAttrValue* attrVal = mAttrs.GetAttr(aAttr); + if (!attrVal) { + return aDefault; + } + + if (attrVal->Type() == nsAttrValue::eInteger) { + return attrVal->GetIntegerValue(); + } + + if (attrVal->Type() == nsAttrValue::ePercent) { + // This is a nasty hack. When we parsed the value, we stored it as an + // ePercent, not eInteger, because there was a '%' after it in the string. + // But the spec says to basically re-parse the string as an integer. + // Luckily, we can just return the value we have stored. But + // GetPercentValue() divides it by 100, so we need to multiply it back. + return uint32_t(attrVal->GetPercentValue() * 100.0f); + } + + if (attrVal->Type() == nsAttrValue::eDoubleValue) { + return uint32_t(attrVal->GetDoubleValue()); + } + + // Unfortunately, the set of values that are valid dimensions is not a + // superset of values that are valid unsigned ints. In particular "+100" is + // not a valid dimension, but should parse as the unsigned int "100". So if + // we got here and we don't have a valid dimension value, just try re-parsing + // the string we have as an integer. + nsAutoString val; + attrVal->ToString(val); + nsContentUtils::ParseHTMLIntegerResultFlags result; + int32_t parsedInt = nsContentUtils::ParseHTMLInteger(val, &result); + if ((result & nsContentUtils::eParseHTMLInteger_Error) || parsedInt < 0) { + return aDefault; + } + + return parsedInt; +} + +void nsGenericHTMLElement::GetURIAttr(nsAtom* aAttr, nsAtom* aBaseAttr, + nsAString& aResult) const { + nsCOMPtr<nsIURI> uri; + bool hadAttr = GetURIAttr(aAttr, aBaseAttr, getter_AddRefs(uri)); + if (!hadAttr) { + aResult.Truncate(); + return; + } + + if (!uri) { + // Just return the attr value + GetAttr(kNameSpaceID_None, aAttr, aResult); + return; + } + + nsAutoCString spec; + uri->GetSpec(spec); + CopyUTF8toUTF16(spec, aResult); +} + +bool nsGenericHTMLElement::GetURIAttr(nsAtom* aAttr, nsAtom* aBaseAttr, + nsIURI** aURI) const { + *aURI = nullptr; + + const nsAttrValue* attr = mAttrs.GetAttr(aAttr); + if (!attr) { + return false; + } + + nsCOMPtr<nsIURI> baseURI = GetBaseURI(); + + if (aBaseAttr) { + nsAutoString baseAttrValue; + if (GetAttr(kNameSpaceID_None, aBaseAttr, baseAttrValue)) { + nsCOMPtr<nsIURI> baseAttrURI; + nsresult rv = nsContentUtils::NewURIWithDocumentCharset( + getter_AddRefs(baseAttrURI), baseAttrValue, OwnerDoc(), baseURI); + if (NS_FAILED(rv)) { + return true; + } + baseURI.swap(baseAttrURI); + } + } + + // Don't care about return value. If it fails, we still want to + // return true, and *aURI will be null. + nsContentUtils::NewURIWithDocumentCharset(aURI, attr->GetStringValue(), + OwnerDoc(), baseURI); + return true; +} + +HTMLMenuElement* nsGenericHTMLElement::GetContextMenu() const { + nsAutoString value; + GetHTMLAttr(nsGkAtoms::contextmenu, value); + if (!value.IsEmpty()) { + // XXXsmaug How should this work in Shadow DOM? + Document* doc = GetUncomposedDoc(); + if (doc) { + return HTMLMenuElement::FromNodeOrNull(doc->GetElementById(value)); + } + } + return nullptr; +} + +bool nsGenericHTMLElement::IsLabelable() const { + return IsAnyOfHTMLElements(nsGkAtoms::progress, nsGkAtoms::meter); +} + +/* static */ +bool nsGenericHTMLElement::MatchLabelsElement(Element* aElement, + int32_t aNamespaceID, + nsAtom* aAtom, void* aData) { + HTMLLabelElement* element = HTMLLabelElement::FromNode(aElement); + return element && element->GetControl() == aData; +} + +already_AddRefed<nsINodeList> nsGenericHTMLElement::Labels() { + MOZ_ASSERT(IsLabelable(), + "Labels() only allow labelable elements to use it."); + nsExtendedDOMSlots* slots = ExtendedDOMSlots(); + + if (!slots->mLabelsList) { + slots->mLabelsList = + new nsLabelsNodeList(SubtreeRoot(), MatchLabelsElement, nullptr, this); + } + + RefPtr<nsLabelsNodeList> labels = slots->mLabelsList; + return labels.forget(); +} + +// static +bool nsGenericHTMLElement::LegacyTouchAPIEnabled(JSContext* aCx, + JSObject* aGlobal) { + return TouchEvent::LegacyAPIEnabled(aCx, aGlobal); +} + +//---------------------------------------------------------------------- + +nsGenericHTMLFormElement::nsGenericHTMLFormElement( + already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo, uint8_t aType) + : nsGenericHTMLElement(std::move(aNodeInfo)), + nsIFormControl(aType), + mForm(nullptr), + mFieldSet(nullptr) { + // We should add the NS_EVENT_STATE_ENABLED bit here as needed, but + // that depends on our type, which is not initialized yet. So we + // have to do this in subclasses. +} + +nsGenericHTMLFormElement::~nsGenericHTMLFormElement() { + if (mFieldSet) { + mFieldSet->RemoveElement(this); + } + + // Check that this element doesn't know anything about its form at this point. + NS_ASSERTION(!mForm, "mForm should be null at this point!"); +} + +NS_IMPL_ISUPPORTS_INHERITED(nsGenericHTMLFormElement, nsGenericHTMLElement, + nsIFormControl) + +nsINode* nsGenericHTMLFormElement::GetScopeChainParent() const { + return mForm ? mForm : nsGenericHTMLElement::GetScopeChainParent(); +} + +bool nsGenericHTMLFormElement::IsNodeOfType(uint32_t aFlags) const { + return !(aFlags & ~eHTML_FORM_CONTROL); +} + +void nsGenericHTMLFormElement::SaveSubtreeState() { + SaveState(); + + nsGenericHTMLElement::SaveSubtreeState(); +} + +void nsGenericHTMLFormElement::SetForm(HTMLFormElement* aForm) { + MOZ_ASSERT(aForm, "Don't pass null here"); + NS_ASSERTION(!mForm, + "We don't support switching from one non-null form to another."); + + SetForm(aForm, false); +} + +void nsGenericHTMLFormElement::SetForm(HTMLFormElement* aForm, + bool aBindToTree) { + if (aForm) { + BeforeSetForm(aBindToTree); + } + + // keep a *weak* ref to the form here + mForm = aForm; +} + +void nsGenericHTMLFormElement::ClearForm(bool aRemoveFromForm, + bool aUnbindOrDelete) { + NS_ASSERTION((mForm != nullptr) == HasFlag(ADDED_TO_FORM), + "Form control should have had flag set correctly"); + + if (!mForm) { + return; + } + + if (aRemoveFromForm) { + nsAutoString nameVal, idVal; + GetAttr(kNameSpaceID_None, nsGkAtoms::name, nameVal); + GetAttr(kNameSpaceID_None, nsGkAtoms::id, idVal); + + mForm->RemoveElement(this, true); + + if (!nameVal.IsEmpty()) { + mForm->RemoveElementFromTable(this, nameVal); + } + + if (!idVal.IsEmpty()) { + mForm->RemoveElementFromTable(this, idVal); + } + } + + UnsetFlags(ADDED_TO_FORM); + mForm = nullptr; + + AfterClearForm(aUnbindOrDelete); +} + +HTMLFormElement* nsGenericHTMLFormElement::GetFormElement() { return mForm; } + +HTMLFieldSetElement* nsGenericHTMLFormElement::GetFieldSet() { + return mFieldSet; +} + +nsIContent::IMEState nsGenericHTMLFormElement::GetDesiredIMEState() { + TextEditor* textEditor = GetTextEditorInternal(); + if (!textEditor) { + return nsGenericHTMLElement::GetDesiredIMEState(); + } + IMEState state; + nsresult rv = textEditor->GetPreferredIMEState(&state); + if (NS_FAILED(rv)) { + return nsGenericHTMLElement::GetDesiredIMEState(); + } + return state; +} + +nsresult nsGenericHTMLFormElement::BindToTree(BindContext& aContext, + nsINode& aParent) { + nsresult rv = nsGenericHTMLElement::BindToTree(aContext, aParent); + NS_ENSURE_SUCCESS(rv, rv); + + if (IsAutofocusable() && HasAttr(nsGkAtoms::autofocus) && + aContext.AllowsAutoFocus()) { + aContext.OwnerDoc().SetAutoFocusElement(this); + } + + // If @form is set, the element *has* to be in a composed document, otherwise + // it wouldn't be possible to find an element with the corresponding id. + // If @form isn't set, the element *has* to have a parent, otherwise it + // wouldn't be possible to find a form ancestor. + // We should not call UpdateFormOwner if none of these conditions are + // fulfilled. + if (HasAttr(kNameSpaceID_None, nsGkAtoms::form) ? IsInComposedDoc() + : aParent.IsContent()) { + UpdateFormOwner(true, nullptr); + } + + // Set parent fieldset which should be used for the disabled state. + UpdateFieldSet(false); + + return NS_OK; +} + +void nsGenericHTMLFormElement::UnbindFromTree(bool aNullParent) { + // Save state before doing anything + SaveState(); + + if (mForm) { + // Might need to unset mForm + if (aNullParent) { + // No more parent means no more form + ClearForm(true, true); + } else { + // Recheck whether we should still have an mForm. + if (HasAttr(kNameSpaceID_None, nsGkAtoms::form) || + !FindAncestorForm(mForm)) { + ClearForm(true, true); + } else { + UnsetFlags(MAYBE_ORPHAN_FORM_ELEMENT); + } + } + + if (!mForm) { + // Our novalidate state might have changed + UpdateState(false); + } + } + + // We have to remove the form id observer if there was one. + // We will re-add one later if needed (during bind to tree). + if (nsContentUtils::HasNonEmptyAttr(this, kNameSpaceID_None, + nsGkAtoms::form)) { + RemoveFormIdObserver(); + } + + nsGenericHTMLElement::UnbindFromTree(aNullParent); + + // The element might not have a fieldset anymore. + UpdateFieldSet(false); +} + +nsresult nsGenericHTMLFormElement::BeforeSetAttr( + int32_t aNameSpaceID, nsAtom* aName, const nsAttrValueOrString* aValue, + bool aNotify) { + if (aNameSpaceID == kNameSpaceID_None) { + nsAutoString tmp; + + // remove the control from the hashtable as needed + + if (mForm && (aName == nsGkAtoms::name || aName == nsGkAtoms::id)) { + GetAttr(kNameSpaceID_None, aName, tmp); + + if (!tmp.IsEmpty()) { + mForm->RemoveElementFromTable(this, tmp); + } + } + + if (mForm && aName == nsGkAtoms::type) { + GetAttr(kNameSpaceID_None, nsGkAtoms::name, tmp); + + if (!tmp.IsEmpty()) { + mForm->RemoveElementFromTable(this, tmp); + } + + GetAttr(kNameSpaceID_None, nsGkAtoms::id, tmp); + + if (!tmp.IsEmpty()) { + mForm->RemoveElementFromTable(this, tmp); + } + + mForm->RemoveElement(this, false); + } + + if (aName == nsGkAtoms::form) { + // If @form isn't set or set to the empty string, there were no observer + // so we don't have to remove it. + if (nsContentUtils::HasNonEmptyAttr(this, kNameSpaceID_None, + nsGkAtoms::form)) { + // The current form id observer is no longer needed. + // A new one may be added in AfterSetAttr. + RemoveFormIdObserver(); + } + } + } + + return nsGenericHTMLElement::BeforeSetAttr(aNameSpaceID, aName, aValue, + aNotify); +} + +nsresult nsGenericHTMLFormElement::AfterSetAttr( + int32_t aNameSpaceID, nsAtom* aName, const nsAttrValue* aValue, + const nsAttrValue* aOldValue, nsIPrincipal* aMaybeScriptedPrincipal, + bool aNotify) { + if (aNameSpaceID == kNameSpaceID_None) { + // add the control to the hashtable as needed + + if (mForm && (aName == nsGkAtoms::name || aName == nsGkAtoms::id) && + aValue && !aValue->IsEmptyString()) { + MOZ_ASSERT(aValue->Type() == nsAttrValue::eAtom, + "Expected atom value for name/id"); + mForm->AddElementToTable(this, + nsDependentAtomString(aValue->GetAtomValue())); + } + + if (mForm && aName == nsGkAtoms::type) { + nsAutoString tmp; + + GetAttr(kNameSpaceID_None, nsGkAtoms::name, tmp); + + if (!tmp.IsEmpty()) { + mForm->AddElementToTable(this, tmp); + } + + GetAttr(kNameSpaceID_None, nsGkAtoms::id, tmp); + + if (!tmp.IsEmpty()) { + mForm->AddElementToTable(this, tmp); + } + + mForm->AddElement(this, false, aNotify); + } + + if (aName == nsGkAtoms::form) { + // We need a new form id observer. + DocumentOrShadowRoot* docOrShadow = + GetUncomposedDocOrConnectedShadowRoot(); + if (docOrShadow) { + Element* formIdElement = nullptr; + if (aValue && !aValue->IsEmptyString()) { + formIdElement = AddFormIdObserver(); + } + + // Because we have a new @form value (or no more @form), we have to + // update our form owner. + UpdateFormOwner(false, formIdElement); + } + } + } + + return nsGenericHTMLElement::AfterSetAttr( + aNameSpaceID, aName, aValue, aOldValue, aMaybeScriptedPrincipal, aNotify); +} + +void nsGenericHTMLFormElement::GetEventTargetParent( + EventChainPreVisitor& aVisitor) { + if (aVisitor.mEvent->IsTrusted() && (aVisitor.mEvent->mMessage == eFocus || + aVisitor.mEvent->mMessage == eBlur)) { + // We have to handle focus/blur event to change focus states in + // PreHandleEvent to prevent it breaks event target chain creation. + aVisitor.mWantsPreHandleEvent = true; + } + nsGenericHTMLElement::GetEventTargetParent(aVisitor); +} + +nsresult nsGenericHTMLFormElement::PreHandleEvent(EventChainVisitor& aVisitor) { + if (aVisitor.mEvent->IsTrusted()) { + switch (aVisitor.mEvent->mMessage) { + case eFocus: { + // Check to see if focus has bubbled up from a form control's + // child textfield or button. If that's the case, don't focus + // this parent file control -- leave focus on the child. + nsIFormControlFrame* formControlFrame = GetFormControlFrame(true); + if (formControlFrame && + aVisitor.mEvent->mOriginalTarget == static_cast<nsINode*>(this)) + formControlFrame->SetFocus(true, true); + break; + } + case eBlur: { + nsIFormControlFrame* formControlFrame = GetFormControlFrame(true); + if (formControlFrame) formControlFrame->SetFocus(false, false); + break; + } + default: + break; + } + } + return nsGenericHTMLElement::PreHandleEvent(aVisitor); +} + +void nsGenericHTMLFormElement::ForgetFieldSet(nsIContent* aFieldset) { + if (mFieldSet == aFieldset) { + mFieldSet = nullptr; + } +} + +bool nsGenericHTMLFormElement::CanBeDisabled() const { + int32_t type = ControlType(); + // It's easier to test the types that _cannot_ be disabled + return type != NS_FORM_OBJECT && type != NS_FORM_OUTPUT; +} + +bool nsGenericHTMLFormElement::DoesReadOnlyApply() const { + int32_t type = ControlType(); + if (!(type & NS_FORM_INPUT_ELEMENT) && type != NS_FORM_TEXTAREA) { + return false; + } + + switch (type) { + case NS_FORM_INPUT_HIDDEN: + case NS_FORM_INPUT_BUTTON: + case NS_FORM_INPUT_IMAGE: + case NS_FORM_INPUT_RESET: + case NS_FORM_INPUT_SUBMIT: + case NS_FORM_INPUT_RADIO: + case NS_FORM_INPUT_FILE: + case NS_FORM_INPUT_CHECKBOX: + case NS_FORM_INPUT_RANGE: + case NS_FORM_INPUT_COLOR: + return false; +#ifdef DEBUG + case NS_FORM_TEXTAREA: + case NS_FORM_INPUT_TEXT: + case NS_FORM_INPUT_PASSWORD: + case NS_FORM_INPUT_SEARCH: + case NS_FORM_INPUT_TEL: + case NS_FORM_INPUT_EMAIL: + case NS_FORM_INPUT_URL: + case NS_FORM_INPUT_NUMBER: + case NS_FORM_INPUT_DATE: + case NS_FORM_INPUT_TIME: + case NS_FORM_INPUT_MONTH: + case NS_FORM_INPUT_WEEK: + case NS_FORM_INPUT_DATETIME_LOCAL: + return true; + default: + MOZ_ASSERT_UNREACHABLE("Unexpected input type in DoesReadOnlyApply()"); + return true; +#else // DEBUG + default: + return true; +#endif // DEBUG + } +} + +bool nsGenericHTMLFormElement::IsHTMLFocusable(bool aWithMouse, + bool* aIsFocusable, + int32_t* aTabIndex) { + if (nsGenericHTMLElement::IsHTMLFocusable(aWithMouse, aIsFocusable, + aTabIndex)) { + return true; + } + +#ifdef XP_MACOSX + *aIsFocusable = (!aWithMouse || nsFocusManager::sMouseFocusesFormControl) && + *aIsFocusable; +#endif + return false; +} + +EventStates nsGenericHTMLFormElement::IntrinsicState() const { + // If you add attribute-dependent states here, you need to add them them to + // AfterSetAttr too. And add them to AfterSetAttr for all subclasses that + // implement IntrinsicState() and are affected by that attribute. + EventStates state = nsGenericHTMLElement::IntrinsicState(); + + if (mForm && mForm->IsDefaultSubmitElement(this)) { + NS_ASSERTION(IsSubmitControl(), + "Default submit element that isn't a submit control."); + // We are the default submit element (:default) + state |= NS_EVENT_STATE_DEFAULT; + } + + // Make the text controls read-write + if (!state.HasState(NS_EVENT_STATE_READWRITE) && DoesReadOnlyApply()) { + if (!GetBoolAttr(nsGkAtoms::readonly) && !IsDisabled()) { + state |= NS_EVENT_STATE_READWRITE; + state &= ~NS_EVENT_STATE_READONLY; + } + } + + return state; +} + +nsGenericHTMLFormElement::FocusTristate nsGenericHTMLFormElement::FocusState() { + // We can't be focused if we aren't in a (composed) document + Document* doc = GetComposedDoc(); + if (!doc) return eUnfocusable; + + // first see if we are disabled or not. If disabled then do nothing. + if (IsDisabled()) { + return eUnfocusable; + } + + return IsInActiveTab(doc) ? eActiveWindow : eInactiveWindow; +} + +Element* nsGenericHTMLFormElement::AddFormIdObserver() { + nsAutoString formId; + DocumentOrShadowRoot* docOrShadow = GetUncomposedDocOrConnectedShadowRoot(); + GetAttr(kNameSpaceID_None, nsGkAtoms::form, formId); + NS_ASSERTION(!formId.IsEmpty(), + "@form value should not be the empty string!"); + RefPtr<nsAtom> atom = NS_Atomize(formId); + + return docOrShadow->AddIDTargetObserver(atom, FormIdUpdated, this, false); +} + +void nsGenericHTMLFormElement::RemoveFormIdObserver() { + DocumentOrShadowRoot* docOrShadow = GetUncomposedDocOrConnectedShadowRoot(); + if (!docOrShadow) { + return; + } + + nsAutoString formId; + GetAttr(kNameSpaceID_None, nsGkAtoms::form, formId); + NS_ASSERTION(!formId.IsEmpty(), + "@form value should not be the empty string!"); + RefPtr<nsAtom> atom = NS_Atomize(formId); + + docOrShadow->RemoveIDTargetObserver(atom, FormIdUpdated, this, false); +} + +/* static */ +bool nsGenericHTMLFormElement::FormIdUpdated(Element* aOldElement, + Element* aNewElement, + void* aData) { + nsGenericHTMLFormElement* element = + static_cast<nsGenericHTMLFormElement*>(aData); + + NS_ASSERTION(element->IsHTMLElement(), "aData should be an HTML element"); + + element->UpdateFormOwner(false, aNewElement); + + return true; +} + +bool nsGenericHTMLFormElement::IsElementDisabledForEvents(WidgetEvent* aEvent, + nsIFrame* aFrame) { + MOZ_ASSERT(aEvent); + + // Allow dispatch of CustomEvent and untrusted Events. + if (!aEvent->IsTrusted()) { + return false; + } + + switch (aEvent->mMessage) { + case eAnimationStart: + case eAnimationEnd: + case eAnimationIteration: + case eAnimationCancel: + case eFormChange: + case eMouseMove: + case eMouseOver: + case eMouseOut: + case eMouseEnter: + case eMouseLeave: + case ePointerMove: + case ePointerOver: + case ePointerOut: + case ePointerEnter: + case ePointerLeave: + case eTransitionCancel: + case eTransitionEnd: + case eTransitionRun: + case eTransitionStart: + case eWheel: + case eLegacyMouseLineOrPageScroll: + case eLegacyMousePixelScroll: + return false; + default: + break; + } + + if (aEvent->mSpecifiedEventType == nsGkAtoms::oninput) { + return false; + } + + // FIXME(emilio): This poking at the style of the frame is slightly bogus + // unless we flush before every event, which we don't really want to do. + if (aFrame && aFrame->StyleUI()->mUserInput == StyleUserInput::None) { + return true; + } + + return IsDisabled(); +} + +void nsGenericHTMLFormElement::UpdateFormOwner(bool aBindToTree, + Element* aFormIdElement) { + MOZ_ASSERT(!aBindToTree || !aFormIdElement, + "aFormIdElement shouldn't be set if aBindToTree is true!"); + + bool needStateUpdate = false; + if (!aBindToTree) { + needStateUpdate = mForm && mForm->IsDefaultSubmitElement(this); + ClearForm(true, false); + } + + HTMLFormElement* oldForm = mForm; + + if (!mForm) { + // If @form is set, we have to use that to find the form. + nsAutoString formId; + if (GetAttr(kNameSpaceID_None, nsGkAtoms::form, formId)) { + if (!formId.IsEmpty()) { + Element* element = nullptr; + + if (aBindToTree) { + element = AddFormIdObserver(); + } else { + element = aFormIdElement; + } + + NS_ASSERTION(!IsInComposedDoc() || + element == GetUncomposedDocOrConnectedShadowRoot() + ->GetElementById(formId), + "element should be equals to the current element " + "associated with the id in @form!"); + + if (element && element->IsHTMLElement(nsGkAtoms::form) && + nsContentUtils::IsInSameAnonymousTree(this, element)) { + SetForm(static_cast<HTMLFormElement*>(element), aBindToTree); + } + } + } else { + // We now have a parent, so we may have picked up an ancestor form. Search + // for it. Note that if mForm is already set we don't want to do this, + // because that means someone (probably the content sink) has already set + // it to the right value. Also note that even if being bound here didn't + // change our parent, we still need to search, since our parent chain + // probably changed _somewhere_. + SetForm(FindAncestorForm(), aBindToTree); + } + } + + if (mForm && !HasFlag(ADDED_TO_FORM)) { + // Now we need to add ourselves to the form + nsAutoString nameVal, idVal; + GetAttr(kNameSpaceID_None, nsGkAtoms::name, nameVal); + GetAttr(kNameSpaceID_None, nsGkAtoms::id, idVal); + + SetFlags(ADDED_TO_FORM); + + // Notify only if we just found this mForm. + mForm->AddElement(this, true, oldForm == nullptr); + + if (!nameVal.IsEmpty()) { + mForm->AddElementToTable(this, nameVal); + } + + if (!idVal.IsEmpty()) { + mForm->AddElementToTable(this, idVal); + } + } + + if (mForm != oldForm || needStateUpdate) { + UpdateState(true); + } +} + +void nsGenericHTMLFormElement::UpdateFieldSet(bool aNotify) { + if (IsInNativeAnonymousSubtree()) { + MOZ_ASSERT(!mFieldSet); + return; + } + + nsIContent* parent = nullptr; + nsIContent* prev = nullptr; + + for (parent = GetParent(); parent; + prev = parent, parent = parent->GetParent()) { + HTMLFieldSetElement* fieldset = HTMLFieldSetElement::FromNode(parent); + if (fieldset && (!prev || fieldset->GetFirstLegend() != prev)) { + if (mFieldSet == fieldset) { + // We already have the right fieldset; + return; + } + + if (mFieldSet) { + mFieldSet->RemoveElement(this); + } + mFieldSet = fieldset; + fieldset->AddElement(this); + + // The disabled state may have changed + FieldSetDisabledChanged(aNotify); + return; + } + } + + // No fieldset found. + if (mFieldSet) { + mFieldSet->RemoveElement(this); + mFieldSet = nullptr; + // The disabled state may have changed + FieldSetDisabledChanged(aNotify); + } +} + +void nsGenericHTMLFormElement::UpdateDisabledState(bool aNotify) { + if (!CanBeDisabled()) { + return; + } + + const bool isDisabled = + HasAttr(nsGkAtoms::disabled) || (mFieldSet && mFieldSet->IsDisabled()); + + const EventStates disabledStates = + isDisabled ? NS_EVENT_STATE_DISABLED : NS_EVENT_STATE_ENABLED; + + EventStates oldDisabledStates = State() & DISABLED_STATES; + EventStates changedStates = disabledStates ^ oldDisabledStates; + + if (!changedStates.IsEmpty()) { + ToggleStates(changedStates, aNotify); + if (DoesReadOnlyApply()) { + // :disabled influences :read-only / :read-write. + UpdateState(aNotify); + } + } +} + +void nsGenericHTMLFormElement::UpdateRequiredState(bool aIsRequired, + bool aNotify) { +#ifdef DEBUG + int32_t type = ControlType(); +#endif + MOZ_ASSERT((type & NS_FORM_INPUT_ELEMENT) || type == NS_FORM_SELECT || + type == NS_FORM_TEXTAREA, + "This should be called only on types that @required applies"); + +#ifdef DEBUG + HTMLInputElement* input = HTMLInputElement::FromNode(this); + if (input) { + MOZ_ASSERT( + input->DoesRequiredApply(), + "This should be called only on input types that @required applies"); + } +#endif + + EventStates requiredStates; + if (aIsRequired) { + requiredStates |= NS_EVENT_STATE_REQUIRED; + } else { + requiredStates |= NS_EVENT_STATE_OPTIONAL; + } + + EventStates oldRequiredStates = State() & REQUIRED_STATES; + EventStates changedStates = requiredStates ^ oldRequiredStates; + + if (!changedStates.IsEmpty()) { + ToggleStates(changedStates, aNotify); + } +} + +void nsGenericHTMLFormElement::FieldSetDisabledChanged(bool aNotify) { + UpdateDisabledState(aNotify); +} + +bool nsGenericHTMLFormElement::IsLabelable() const { + uint32_t type = ControlType(); + return (type & NS_FORM_INPUT_ELEMENT && type != NS_FORM_INPUT_HIDDEN) || + type & NS_FORM_BUTTON_ELEMENT || type == NS_FORM_OUTPUT || + type == NS_FORM_SELECT || type == NS_FORM_TEXTAREA; +} + +void nsGenericHTMLFormElement::GetFormAction(nsString& aValue) { + uint32_t type = ControlType(); + if (!(type & NS_FORM_INPUT_ELEMENT) && !(type & NS_FORM_BUTTON_ELEMENT)) { + return; + } + + if (!GetAttr(kNameSpaceID_None, nsGkAtoms::formaction, aValue) || + aValue.IsEmpty()) { + Document* document = OwnerDoc(); + nsIURI* docURI = document->GetDocumentURI(); + if (docURI) { + nsAutoCString spec; + nsresult rv = docURI->GetSpec(spec); + if (NS_FAILED(rv)) { + return; + } + + CopyUTF8toUTF16(spec, aValue); + } + } else { + GetURIAttr(nsGkAtoms::formaction, nullptr, aValue); + } +} + +//---------------------------------------------------------------------- + +void nsGenericHTMLElement::Click(CallerType aCallerType) { + if (IsDisabled() || HandlingClick()) { + return; + } + + // Strong in case the event kills it + nsCOMPtr<Document> doc = GetComposedDoc(); + + RefPtr<nsPresContext> context; + if (doc) { + context = doc->GetPresContext(); + } + + SetHandlingClick(); + + // Mark this event trusted if Click() is called from system code. + WidgetMouseEvent event(aCallerType == CallerType::System, eMouseClick, + nullptr, WidgetMouseEvent::eReal); + event.mFlags.mIsPositionless = true; + event.mInputSource = MouseEvent_Binding::MOZ_SOURCE_UNKNOWN; + + EventDispatcher::Dispatch(static_cast<nsIContent*>(this), context, &event); + + ClearHandlingClick(); +} + +bool nsGenericHTMLElement::IsHTMLFocusable(bool aWithMouse, bool* aIsFocusable, + int32_t* aTabIndex) { + Document* doc = GetComposedDoc(); + if (!doc || doc->HasFlag(NODE_IS_EDITABLE)) { + // In designMode documents we only allow focusing the document. + if (aTabIndex) { + *aTabIndex = -1; + } + + *aIsFocusable = false; + + return true; + } + + int32_t tabIndex = TabIndex(); + bool disabled = false; + bool disallowOverridingFocusability = true; + Maybe<int32_t> attrVal = GetTabIndexAttrValue(); + + if (IsEditableRoot()) { + // Editable roots should always be focusable. + disallowOverridingFocusability = true; + + // Ignore the disabled attribute in editable contentEditable/designMode + // roots. + if (attrVal.isNothing()) { + // The default value for tabindex should be 0 for editable + // contentEditable roots. + tabIndex = 0; + } + } else { + disallowOverridingFocusability = false; + + // Just check for disabled attribute on form controls + disabled = IsDisabled(); + if (disabled) { + tabIndex = -1; + } + } + + if (aTabIndex) { + *aTabIndex = tabIndex; + } + + // If a tabindex is specified at all, or the default tabindex is 0, we're + // focusable + *aIsFocusable = (tabIndex >= 0 || (!disabled && attrVal.isSome())); + + return disallowOverridingFocusability; +} + +void nsGenericHTMLElement::RegUnRegAccessKey(bool aDoReg) { + // first check to see if we have an access key + nsAutoString accessKey; + GetAttr(kNameSpaceID_None, nsGkAtoms::accesskey, accessKey); + if (accessKey.IsEmpty()) { + return; + } + + // We have an access key, so get the ESM from the pres context. + nsPresContext* presContext = GetPresContext(eForUncomposedDoc); + + if (presContext) { + EventStateManager* esm = presContext->EventStateManager(); + + // Register or unregister as appropriate. + if (aDoReg) { + esm->RegisterAccessKey(this, (uint32_t)accessKey.First()); + } else { + esm->UnregisterAccessKey(this, (uint32_t)accessKey.First()); + } + } +} + +bool nsGenericHTMLElement::PerformAccesskey(bool aKeyCausesActivation, + bool aIsTrustedEvent) { + nsPresContext* presContext = GetPresContext(eForUncomposedDoc); + if (!presContext) { + return false; + } + + // It's hard to say what HTML4 wants us to do in all cases. + bool focused = true; + if (RefPtr<nsFocusManager> fm = nsFocusManager::GetFocusManager()) { + fm->SetFocus(this, nsIFocusManager::FLAG_BYKEY); + + // Return true if the element became the current focus within its window. + // + // FIXME(emilio): Shouldn't this check `window->GetFocusedElement() == this` + // based on the above comment? + nsPIDOMWindowOuter* window = OwnerDoc()->GetWindow(); + focused = window && window->GetFocusedElement(); + } + + if (aKeyCausesActivation) { + // Click on it if the users prefs indicate to do so. + AutoPopupStatePusher popupStatePusher( + aIsTrustedEvent ? PopupBlocker::openAllowed : PopupBlocker::openAbused); + DispatchSimulatedClick(this, aIsTrustedEvent, presContext); + } + + return focused; +} + +nsresult nsGenericHTMLElement::DispatchSimulatedClick( + nsGenericHTMLElement* aElement, bool aIsTrusted, + nsPresContext* aPresContext) { + WidgetMouseEvent event(aIsTrusted, eMouseClick, nullptr, + WidgetMouseEvent::eReal); + event.mInputSource = MouseEvent_Binding::MOZ_SOURCE_KEYBOARD; + event.mFlags.mIsPositionless = true; + return EventDispatcher::Dispatch(ToSupports(aElement), aPresContext, &event); +} + +already_AddRefed<TextEditor> nsGenericHTMLElement::GetAssociatedEditor() { + // If contenteditable is ever implemented, it might need to do something + // different here? + + RefPtr<TextEditor> textEditor = GetTextEditorInternal(); + return textEditor.forget(); +} + +// static +void nsGenericHTMLElement::SyncEditorsOnSubtree(nsIContent* content) { + /* Sync this node */ + nsGenericHTMLElement* element = FromNode(content); + if (element) { + RefPtr<TextEditor> textEditor = element->GetAssociatedEditor(); + if (textEditor) { + textEditor->SyncRealTimeSpell(); + } + } + + /* Sync all children */ + for (nsIContent* child = content->GetFirstChild(); child; + child = child->GetNextSibling()) { + SyncEditorsOnSubtree(child); + } +} + +void nsGenericHTMLElement::RecompileScriptEventListeners() { + int32_t i, count = mAttrs.AttrCount(); + for (i = 0; i < count; ++i) { + const nsAttrName* name = mAttrs.AttrNameAt(i); + + // Eventlistenener-attributes are always in the null namespace + if (!name->IsAtom()) { + continue; + } + + nsAtom* attr = name->Atom(); + if (!IsEventAttributeName(attr)) { + continue; + } + + nsAutoString value; + GetAttr(kNameSpaceID_None, attr, value); + SetEventHandler(GetEventNameForAttr(attr), value, true); + } +} + +bool nsGenericHTMLElement::IsEditableRoot() const { + Document* document = GetComposedDoc(); + if (!document) { + return false; + } + + if (document->HasFlag(NODE_IS_EDITABLE)) { + return false; + } + + if (GetContentEditableValue() != eTrue) { + return false; + } + + nsIContent* parent = GetParent(); + + return !parent || !parent->HasFlag(NODE_IS_EDITABLE); +} + +static void MakeContentDescendantsEditable(nsIContent* aContent, + Document* aDocument) { + // If aContent is not an element, we just need to update its + // internal editable state and don't need to notify anyone about + // that. For elements, we need to send a ContentStateChanged + // notification. + if (!aContent->IsElement()) { + aContent->UpdateEditableState(false); + return; + } + + Element* element = aContent->AsElement(); + + element->UpdateEditableState(true); + + for (nsIContent* child = aContent->GetFirstChild(); child; + child = child->GetNextSibling()) { + if (!child->IsElement() || + !child->AsElement()->HasAttr(kNameSpaceID_None, + nsGkAtoms::contenteditable)) { + MakeContentDescendantsEditable(child, aDocument); + } + } +} + +void nsGenericHTMLElement::ChangeEditableState(int32_t aChange) { + Document* document = GetComposedDoc(); + if (!document) { + return; + } + + Document::EditingState previousEditingState = Document::EditingState::eOff; + if (aChange != 0) { + document->ChangeContentEditableCount(this, aChange); + previousEditingState = document->GetEditingState(); + } + + if (document->HasFlag(NODE_IS_EDITABLE)) { + document = nullptr; + } + + // MakeContentDescendantsEditable is going to call ContentStateChanged for + // this element and all descendants if editable state has changed. + // We might as well wrap it all in one script blocker. + nsAutoScriptBlocker scriptBlocker; + MakeContentDescendantsEditable(this, document); + + // If the document already had contenteditable and JS adds new + // contenteditable, that might cause changing editing host to current editing + // host's ancestor. In such case, HTMLEditor needs to know that + // synchronously to update selection limitter. + if (document && aChange > 0 && + previousEditingState == Document::EditingState::eContentEditable) { + if (HTMLEditor* htmlEditor = + nsContentUtils::GetHTMLEditor(document->GetPresContext())) { + htmlEditor->NotifyEditingHostMaybeChanged(); + } + } +} + +//---------------------------------------------------------------------- + +nsGenericHTMLFormElementWithState::nsGenericHTMLFormElementWithState( + already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo, + FromParser aFromParser, uint8_t aType) + : nsGenericHTMLFormElement(std::move(aNodeInfo), aType), + mControlNumber(!!(aFromParser & FROM_PARSER_NETWORK) + ? OwnerDoc()->GetNextControlNumber() + : -1) { + mStateKey.SetIsVoid(true); +} + +void nsGenericHTMLFormElementWithState::GenerateStateKey() { + // Keep the key if already computed + if (!mStateKey.IsVoid()) { + return; + } + + Document* doc = GetUncomposedDoc(); + if (!doc) { + mStateKey.Truncate(); + return; + } + + // Generate the state key + nsContentUtils::GenerateStateKey(this, doc, mStateKey); + + // If the state key is blank, this is anonymous content or for whatever + // reason we are not supposed to save/restore state: keep it as such. + if (!mStateKey.IsEmpty()) { + // Add something unique to content so layout doesn't muck us up. + mStateKey += "-C"; + } +} + +PresState* nsGenericHTMLFormElementWithState::GetPrimaryPresState() { + if (mStateKey.IsEmpty()) { + return nullptr; + } + + nsCOMPtr<nsILayoutHistoryState> history = GetLayoutHistory(false); + + if (!history) { + return nullptr; + } + + // Get the pres state for this key, if it doesn't exist, create one. + PresState* result = history->GetState(mStateKey); + if (!result) { + UniquePtr<PresState> newState = NewPresState(); + result = newState.get(); + history->AddState(mStateKey, std::move(newState)); + } + + return result; +} + +already_AddRefed<nsILayoutHistoryState> +nsGenericHTMLFormElementWithState::GetLayoutHistory(bool aRead) { + nsCOMPtr<Document> doc = GetUncomposedDoc(); + if (!doc) { + return nullptr; + } + + // + // Get the history + // + nsCOMPtr<nsILayoutHistoryState> history = doc->GetLayoutHistoryState(); + if (!history) { + return nullptr; + } + + if (aRead && !history->HasStates()) { + return nullptr; + } + + return history.forget(); +} + +bool nsGenericHTMLFormElementWithState::RestoreFormControlState() { + MOZ_ASSERT(!mStateKey.IsVoid(), + "GenerateStateKey must already have been called"); + + if (mStateKey.IsEmpty()) { + return false; + } + + nsCOMPtr<nsILayoutHistoryState> history = GetLayoutHistory(true); + if (!history) { + return false; + } + + // Get the pres state for this key + PresState* state = history->GetState(mStateKey); + if (state) { + bool result = RestoreState(state); + history->RemoveState(mStateKey); + return result; + } + + return false; +} + +void nsGenericHTMLFormElementWithState::NodeInfoChanged(Document* aOldDoc) { + nsGenericHTMLElement::NodeInfoChanged(aOldDoc); + + // We need to regenerate the state key now we're in a new document. Clearing + // mControlNumber means we stop considering this control to be parser + // inserted, and we'll generate a state key based on its position in the + // document rather than the order it was inserted into the document. + mControlNumber = -1; + mStateKey.SetIsVoid(true); +} + +bool nsGenericHTMLElement::IsEventAttributeNameInternal(nsAtom* aName) { + return nsContentUtils::IsEventAttributeName(aName, EventNameType_HTML); +} + +/** + * Construct a URI from a string, as an element.src attribute + * would be set to. Helper for the media elements. + */ +nsresult nsGenericHTMLElement::NewURIFromString(const nsAString& aURISpec, + nsIURI** aURI) { + NS_ENSURE_ARG_POINTER(aURI); + + *aURI = nullptr; + + nsCOMPtr<Document> doc = OwnerDoc(); + + nsresult rv = nsContentUtils::NewURIWithDocumentCharset(aURI, aURISpec, doc, + GetBaseURI()); + NS_ENSURE_SUCCESS(rv, rv); + + bool equal; + if (aURISpec.IsEmpty() && doc->GetDocumentURI() && + NS_SUCCEEDED(doc->GetDocumentURI()->Equals(*aURI, &equal)) && equal) { + // Assume an element can't point to a fragment of its embedding + // document. Fail here instead of returning the recursive URI + // and waiting for the subsequent load to fail. + NS_RELEASE(*aURI); + return NS_ERROR_DOM_INVALID_STATE_ERR; + } + + return NS_OK; +} + +void nsGenericHTMLElement::GetInnerText(mozilla::dom::DOMString& aValue, + mozilla::ErrorResult& aError) { + // innerText depends on layout. For example, white space processing is + // something that happens during reflow and which must be reflected by + // innerText. So for: + // + // <div style="white-space:normal"> A B C </div> + // + // innerText should give "A B C". + // + // The approach taken here to avoid the expense of reflow is to flush style + // and then see whether it's necessary to flush layout afterwards. Flushing + // layout can be skipped if we can detect that the element or its descendants + // are not dirty. + + // Obtain the composed doc to handle elements in Shadow DOM. + Document* doc = GetComposedDoc(); + if (doc) { + doc->FlushPendingNotifications(FlushType::Style); + } + + // Elements with `display: content` will not have a frame. To handle Shadow + // DOM, walk the flattened tree looking for parent frame. + nsIFrame* frame = GetPrimaryFrame(); + if (IsDisplayContents()) { + for (Element* parent = GetFlattenedTreeParentElement(); parent; + parent = parent->GetFlattenedTreeParentElement()) { + frame = parent->GetPrimaryFrame(); + if (frame) { + break; + } + } + } + + // Check for dirty reflow roots in the subtree from targetFrame; this requires + // a reflow flush. + bool dirty = frame && frame->PresShell()->FrameIsAncestorOfDirtyRoot(frame); + + // The way we do that is by checking whether the element has either of the two + // dirty bits (NS_FRAME_IS_DIRTY or NS_FRAME_HAS_DIRTY_DESCENDANTS) or if any + // ancestor has NS_FRAME_IS_DIRTY. We need to check for NS_FRAME_IS_DIRTY on + // ancestors since that is something that implies NS_FRAME_IS_DIRTY on all + // descendants. + dirty |= frame && frame->HasAnyStateBits(NS_FRAME_HAS_DIRTY_CHILDREN); + while (!dirty && frame) { + dirty |= frame->HasAnyStateBits(NS_FRAME_IS_DIRTY); + frame = frame->GetInFlowParent(); + } + + // Flush layout if we determined a reflow is required. + if (dirty && doc) { + doc->FlushPendingNotifications(FlushType::Layout); + } + + if (!IsRendered()) { + GetTextContentInternal(aValue, aError); + } else { + nsRange::GetInnerTextNoFlush(aValue, aError, this); + } +} + +void nsGenericHTMLElement::SetInnerText(const nsAString& aValue) { + // Batch possible DOMSubtreeModified events. + mozAutoSubtreeModified subtree(OwnerDoc(), nullptr); + FireNodeRemovedForChildren(); + + // Might as well stick a batch around this since we're performing several + // mutations. + mozAutoDocUpdate updateBatch(GetComposedDoc(), true); + nsAutoMutationBatch mb; + + mb.Init(this, true, false); + + while (HasChildren()) { + RemoveChildNode(nsINode::GetFirstChild(), true); + } + + mb.RemovalDone(); + + nsString str; + const char16_t* s = aValue.BeginReading(); + const char16_t* end = aValue.EndReading(); + while (true) { + if (s != end && *s == '\r' && s + 1 != end && s[1] == '\n') { + // a \r\n pair should only generate one <br>, so just skip the \r + ++s; + } + if (s == end || *s == '\r' || *s == '\n') { + if (!str.IsEmpty()) { + RefPtr<nsTextNode> textContent = new (NodeInfo()->NodeInfoManager()) + nsTextNode(NodeInfo()->NodeInfoManager()); + textContent->SetText(str, true); + AppendChildTo(textContent, true); + } + if (s == end) { + break; + } + str.Truncate(); + RefPtr<mozilla::dom::NodeInfo> ni = + NodeInfo()->NodeInfoManager()->GetNodeInfo( + nsGkAtoms::br, nullptr, kNameSpaceID_XHTML, ELEMENT_NODE); + auto* nim = ni->NodeInfoManager(); + RefPtr<HTMLBRElement> br = new (nim) HTMLBRElement(ni.forget()); + AppendChildTo(br, true); + } else { + str.Append(*s); + } + ++s; + } + + mb.NodesAdded(); +} + +// https://html.spec.whatwg.org/commit-snapshots/b48bb2238269d90ea4f455a52cdf29505aff3df0/#dom-attachinternals +already_AddRefed<ElementInternals> nsGenericHTMLElement::AttachInternals( + ErrorResult& aRv) { + CustomElementData* ceData = GetCustomElementData(); + + // 1. If element's is value is not null, then throw a "NotSupportedError" + // DOMException. + nsAtom* isAtom = ceData ? ceData->GetIs(this) : nullptr; + nsAtom* nameAtom = NodeInfo()->NameAtom(); + if (isAtom) { + aRv.ThrowNotSupportedError(nsPrintfCString( + "Cannot attach ElementInternals to a customized built-in element " + "'%s'", + NS_ConvertUTF16toUTF8(isAtom->GetUTF16String()).get())); + return nullptr; + } + + // 2. Let definition be the result of looking up a custom element definition + // given element's node document, its namespace, its local name, and null + // as is value. + CustomElementDefinition* definition = nullptr; + if (ceData) { + definition = ceData->GetCustomElementDefinition(); + + // If the definition is null, the element possible hasn't yet upgraded. + // Fallback to use LookupCustomElementDefinition to find its definition. + if (!definition) { + definition = nsContentUtils::LookupCustomElementDefinition( + NodeInfo()->GetDocument(), nameAtom, NodeInfo()->NamespaceID(), + ceData->GetCustomElementType()); + } + } + + // 3. If definition is null, then throw an "NotSupportedError" DOMException. + if (!definition) { + aRv.ThrowNotSupportedError(nsPrintfCString( + "Cannot attach ElementInternals to a non-custom element '%s'", + NS_ConvertUTF16toUTF8(nameAtom->GetUTF16String()).get())); + return nullptr; + } + + // 4. If definition's disable internals is true, then throw a + // "NotSupportedError" DOMException. + if (definition->mDisableInternals) { + aRv.ThrowNotSupportedError(nsPrintfCString( + "AttachInternal() to '%s' is disabled by disabledFeatures", + NS_ConvertUTF16toUTF8(nameAtom->GetUTF16String()).get())); + return nullptr; + } + + // 5. If element's attached internals is true, then throw an + // "NotSupportedError" DOMException. + if (ceData->HasAttachedInternals()) { + aRv.ThrowNotSupportedError(nsPrintfCString( + "AttachInternals() has already been called from '%s'", + NS_ConvertUTF16toUTF8(nameAtom->GetUTF16String()).get())); + return nullptr; + } + + // 6. Set element's attached internals to true. + ceData->AttachedInternals(); + + // 7. Create a new ElementInternals instance targeting element, and return it. + return MakeAndAddRef<ElementInternals>(this); +} + +void nsGenericHTMLElement::GetAutocapitalize(nsAString& aValue) { + GetEnumAttr(nsGkAtoms::autocapitalize, nullptr, kDefaultAutocapitalize->tag, + aValue); +} + +bool nsGenericHTMLFormElement::IsAutocapitalizeInheriting() const { + uint32_t type = ControlType(); + return (type & NS_FORM_INPUT_ELEMENT) || (type & NS_FORM_BUTTON_ELEMENT) || + type == NS_FORM_FIELDSET || type == NS_FORM_OUTPUT || + type == NS_FORM_SELECT || type == NS_FORM_TEXTAREA; +} + +void nsGenericHTMLFormElement::GetAutocapitalize(nsAString& aValue) { + if (nsContentUtils::HasNonEmptyAttr(this, kNameSpaceID_None, + nsGkAtoms::autocapitalize)) { + nsGenericHTMLElement::GetAutocapitalize(aValue); + return; + } + + if (mForm && IsAutocapitalizeInheriting()) { + mForm->GetAutocapitalize(aValue); + } +} |