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gecko-dev/dom/html/nsGenericHTMLElement.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/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_browser.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 "nsIContentViewer.h"
#include "mozilla/dom/BindContext.h"
#include "mozilla/dom/Document.h"
#include "nsIDocumentEncoder.h"
#include "nsIDOMWindow.h"
#include "nsMappedAttributes.h"
#include "nsHTMLStyleSheet.h"
#include "nsPIDOMWindow.h"
#include "nsIURL.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 "nsIDocShell.h"
#include "nsNameSpaceManager.h"
#include "nsError.h"
#include "nsIPrincipal.h"
#include "nsContainerFrame.h"
#include "nsStyleUtil.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 "nsITextControlElement.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 "ReferrerPolicy.h"
#include "mozilla/dom/HTMLLabelElement.h"
#include "mozilla/dom/HTMLInputElement.h"
using namespace mozilla;
using namespace mozilla::dom;
nsresult nsGenericHTMLElement::CopyInnerTo(Element* aDst) {
MOZ_ASSERT(!aDst->GetUncomposedDoc(),
"Should not CopyInnerTo an Element in a document");
bool reparse = (aDst->OwnerDoc() != OwnerDoc());
nsresult rv =
static_cast<nsGenericHTMLElement*>(aDst)->mAttrs.EnsureCapacityToClone(
mAttrs);
NS_ENSURE_SUCCESS(rv, rv);
int32_t i, count = GetAttrCount();
for (i = 0; i < count; ++i) {
const nsAttrName* name = mAttrs.AttrNameAt(i);
const nsAttrValue* value = mAttrs.AttrAt(i);
if (name->Equals(nsGkAtoms::style, kNameSpaceID_None) &&
value->Type() == nsAttrValue::eCSSDeclaration) {
// We still clone CSS attributes, even in the cross-document case.
// https://github.com/w3c/webappsec-csp/issues/212
// We can't just set this as a string, because that will fail
// to reparse the string into style data until the node is
// inserted into the document. Clone the Rule instead.
nsAttrValue valueCopy(*value);
rv = aDst->SetParsedAttr(name->NamespaceID(), name->LocalName(),
name->GetPrefix(), valueCopy, false);
NS_ENSURE_SUCCESS(rv, rv);
DeclarationBlock* cssDeclaration = value->GetCSSDeclarationValue();
cssDeclaration->SetImmutable();
} else if (reparse) {
nsAutoString valStr;
value->ToString(valStr);
rv = aDst->SetAttr(name->NamespaceID(), name->LocalName(),
name->GetPrefix(), valStr, false);
NS_ENSURE_SUCCESS(rv, rv);
} else {
nsAttrValue valueCopy(*value);
rv = aDst->SetParsedAttr(name->NamespaceID(), name->LocalName(),
name->GetPrefix(), valueCopy, false);
NS_ENSURE_SUCCESS(rv, rv);
}
}
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 && !IsInAnonymousSubtree()) {
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();
}
}
// Subtract the parent border unless it uses border-box sizing.
if (parent && parent->StylePosition()->mBoxSizing != StyleBoxSizing::Border) {
const nsStyleBorder* border = parent->StyleBorder();
origin.x -= border->GetComputedBorderWidth(eSideLeft);
origin.y -= border->GetComputedBorderWidth(eSideTop);
}
// XXX We should really consider subtracting out padding for
// content-box sizing, but we should see what IE does....
// 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);
}
// 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!");
// Make sure we don't end up finding a form that's anonymous from
// our point of view. See also nsGenericHTMLFormElement::UpdateFieldSet.
nsIContent* bindingParent = GetBindingParent();
nsIContent* content = this;
while (content != bindingParent && 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(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");
nsresult rv = SetEventHandler(aName, aValue->GetStringValue());
NS_ENSURE_SUCCESS(rv, rv);
} 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(NS_LITERAL_STRING("true"), eIgnoreCase) ||
aOldValue->Equals(EmptyString(), eIgnoreCase))) {
editableCountDelta = -1;
}
if (aValue && (aValue->Equals(NS_LITERAL_STRING("true"), eIgnoreCase) ||
aValue->Equals(EmptyString(), eIgnoreCase))) {
++editableCountDelta;
}
ChangeEditableState(editableCountDelta);
} else if (aName == nsGkAtoms::accesskey) {
if (aValue && !aValue->Equals(EmptyString(), eIgnoreCase)) {
SetFlags(NODE_HAS_ACCESSKEY);
RegAccessKey();
}
} else if (aName == nsGkAtoms::name) {
if (aValue && !aValue->Equals(EmptyString(), 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());
}
}
}
}
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;
}
}
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) {
if (aFlushFrames && IsInComposedDoc()) {
// Cause a flush of the frames, so we get up-to-date frame information
GetComposedDoc()->FlushPendingNotifications(FlushType::Frames);
}
nsIFrame* frame = GetPrimaryFrame();
if (frame) {
nsIFormControlFrame* form_frame = do_QueryFrame(frame);
if (form_frame) {
return form_frame;
}
// If we have generated content, the primary frame will be a
// wrapper frame.. out real frame will be in its child list.
for (frame = frame->PrincipalChildList().FirstChild(); frame;
frame = frame->GetNextSibling()) {
form_frame = do_QueryFrame(frame);
if (form_frame) {
return form_frame;
}
}
}
return nullptr;
}
nsPresContext* nsGenericHTMLElement::GetPresContext(PresContextFor aFor) {
// Get the document
Document* doc =
(aFor == eForComposedDoc) ? GetComposedDoc() : GetUncomposedDoc();
if (doc) {
return doc->GetPresContext();
}
return nullptr;
}
static const nsAttrValue::EnumTable kDivAlignTable[] = {
{"left", NS_STYLE_TEXT_ALIGN_MOZ_LEFT},
{"right", NS_STYLE_TEXT_ALIGN_MOZ_RIGHT},
{"center", NS_STYLE_TEXT_ALIGN_MOZ_CENTER},
{"middle", NS_STYLE_TEXT_ALIGN_MOZ_CENTER},
{"justify", NS_STYLE_TEXT_ALIGN_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}};
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", NS_STYLE_TEXT_ALIGN_LEFT},
{"right", NS_STYLE_TEXT_ALIGN_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}};
return aResult.ParseEnumValue(aString, kAlignTable, false);
}
//----------------------------------------
static const nsAttrValue::EnumTable kTableHAlignTable[] = {
{"left", NS_STYLE_TEXT_ALIGN_LEFT},
{"right", NS_STYLE_TEXT_ALIGN_RIGHT},
{"center", NS_STYLE_TEXT_ALIGN_CENTER},
{"char", NS_STYLE_TEXT_ALIGN_CHAR},
{"justify", NS_STYLE_TEXT_ALIGN_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", NS_STYLE_TEXT_ALIGN_MOZ_LEFT},
{"right", NS_STYLE_TEXT_ALIGN_MOZ_RIGHT},
{"center", NS_STYLE_TEXT_ALIGN_MOZ_CENTER},
{"char", NS_STYLE_TEXT_ALIGN_CHAR},
{"justify", NS_STYLE_TEXT_ALIGN_JUSTIFY},
{"middle", NS_STYLE_TEXT_ALIGN_MOZ_CENTER},
{"absmiddle", NS_STYLE_TEXT_ALIGN_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) {
static const nsAttrValue::EnumTable kReferrerTable[] = {
{ReferrerPolicyToString(net::RP_No_Referrer),
static_cast<int16_t>(net::RP_No_Referrer)},
{ReferrerPolicyToString(net::RP_Origin),
static_cast<int16_t>(net::RP_Origin)},
{ReferrerPolicyToString(net::RP_Origin_When_Crossorigin),
static_cast<int16_t>(net::RP_Origin_When_Crossorigin)},
{ReferrerPolicyToString(net::RP_No_Referrer_When_Downgrade),
static_cast<int16_t>(net::RP_No_Referrer_When_Downgrade)},
{ReferrerPolicyToString(net::RP_Unsafe_URL),
static_cast<int16_t>(net::RP_Unsafe_URL)},
{ReferrerPolicyToString(net::RP_Strict_Origin),
static_cast<int16_t>(net::RP_Strict_Origin)},
{ReferrerPolicyToString(net::RP_Same_Origin),
static_cast<int16_t>(net::RP_Same_Origin)},
{ReferrerPolicyToString(net::RP_Strict_Origin_When_Cross_Origin),
static_cast<int16_t>(net::RP_Strict_Origin_When_Cross_Origin)},
{nullptr, 0}};
return aResult.ParseEnumValue(aString, kReferrerTable, 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 == NS_STYLE_TEXT_ALIGN_LEFT) {
aDecls.SetKeywordValue(eCSSProperty_float, StyleFloat::Left);
} else if (align == NS_STYLE_TEXT_ALIGN_RIGHT) {
aDecls.SetKeywordValue(eCSSProperty_float, StyleFloat::Right);
}
}
if (!aDecls.PropertyIsSet(eCSSProperty_vertical_align)) {
switch (align) {
case NS_STYLE_TEXT_ALIGN_LEFT:
case NS_STYLE_TEXT_ALIGN_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) {
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);
}
// NOTE(emilio): If we implement the unrestricted aspect-ratio proposal, we
// probably need to make this attribute mapping not apply to things like
// <marquee> and <table>, which right now can go through this path.
if (StaticPrefs::layout_css_width_and_height_map_to_aspect_ratio_enabled() &&
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.SetNumberValue(eCSSProperty_aspect_ratio, *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();
}
bool nsGenericHTMLElement::IsInteractiveHTMLContent(
bool aIgnoreTabindex) const {
return IsAnyOfHTMLElements(nsGkAtoms::embed) ||
(!aIgnoreTabindex && HasAttr(kNameSpaceID_None, nsGkAtoms::tabindex));
}
// 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);
// An autofocus event has to be launched if the autofocus attribute is
// specified and the element accept the autofocus attribute. In addition,
// the document should not be already loaded and the "browser.autofocus"
// preference should be 'true'.
if (IsAutofocusable() && HasAttr(kNameSpaceID_None, nsGkAtoms::autofocus) &&
StaticPrefs::browser_autofocus() && IsInUncomposedDoc()) {
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_MOZ_READWRITE) && DoesReadOnlyApply()) {
if (!GetBoolAttr(nsGkAtoms::readonly)) {
state |= NS_EVENT_STATE_MOZ_READWRITE;
state &= ~NS_EVENT_STATE_MOZ_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;
}
// If the window is not active, do not allow the focus to bring the
// window to the front. We update the focus controller, but do
// nothing else.
if (nsPIDOMWindowOuter* win = doc->GetWindow()) {
nsCOMPtr<nsPIDOMWindowOuter> rootWindow = win->GetPrivateRoot();
nsCOMPtr<nsIFocusManager> fm = do_GetService(FOCUSMANAGER_CONTRACTID);
if (fm && rootWindow) {
nsCOMPtr<mozIDOMWindowProxy> activeWindow;
fm->GetActiveWindow(getter_AddRefs(activeWindow));
if (activeWindow == rootWindow) {
return eActiveWindow;
}
}
}
return 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 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;
}
// 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) {
nsIContent* parent = nullptr;
nsIContent* prev = nullptr;
// Don't walk out of anonymous subtrees. Note the similar code in
// nsGenericHTMLElement::FindAncestorForm.
nsIContent* bindingParent = GetBindingParent();
for (parent = GetParent(); parent && parent != bindingParent;
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;
}
bool isDisabled = HasAttr(kNameSpaceID_None, nsGkAtoms::disabled);
if (!isDisabled && mFieldSet) {
isDisabled = mFieldSet->IsDisabled();
}
EventStates disabledStates;
if (isDisabled) {
disabledStates |= NS_EVENT_STATE_DISABLED;
} else {
disabledStates |= NS_EVENT_STATE_ENABLED;
}
EventStates oldDisabledStates = State() & DISABLED_STATES;
EventStates changedStates = disabledStates ^ oldDisabledStates;
if (!changedStates.IsEmpty()) {
ToggleStates(changedStates, 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;
if (IsEditableRoot()) {
// Editable roots should always be focusable.
disallowOverridingFocusability = true;
// Ignore the disabled attribute in editable contentEditable/designMode
// roots.
if (!HasAttr(kNameSpaceID_None, nsGkAtoms::tabindex)) {
// 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 && HasAttr(kNameSpaceID_None, nsGkAtoms::tabindex)));
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;
nsFocusManager* fm = nsFocusManager::GetFocusManager();
if (fm) {
fm->SetFocus(this, nsIFocusManager::FLAG_BYKEY |
nsIFocusManager::FLAG_BYELEMENTFOCUS);
// Return true if the element became the current focus within its window.
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(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);
}
nsSize nsGenericHTMLElement::GetWidthHeightForImage(
RefPtr<imgRequestProxy>& aImageRequest) {
nsSize size(0, 0);
nsIFrame* frame = GetPrimaryFrame(FlushType::Layout);
if (frame) {
size = frame->GetContentRect().Size();
size.width = nsPresContext::AppUnitsToIntCSSPixels(size.width);
size.height = nsPresContext::AppUnitsToIntCSSPixels(size.height);
} else {
const nsAttrValue* value;
nsCOMPtr<imgIContainer> image;
if (aImageRequest) {
aImageRequest->GetImage(getter_AddRefs(image));
}
if ((value = GetParsedAttr(nsGkAtoms::width)) &&
value->Type() == nsAttrValue::eInteger) {
size.width = value->GetIntegerValue();
} else if (image) {
image->GetWidth(&size.width);
}
if ((value = GetParsedAttr(nsGkAtoms::height)) &&
value->Type() == nsAttrValue::eInteger) {
size.height = value->GetIntegerValue();
} else if (image) {
image->GetHeight(&size.height);
}
}
NS_ASSERTION(size.width >= 0, "negative width");
NS_ASSERTION(size.height >= 0, "negative height");
return size;
}
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 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);
RefPtr<HTMLBRElement> br = new HTMLBRElement(ni.forget());
AppendChildTo(br, true);
} else {
str.Append(*s);
}
++s;
}
mb.NodesAdded();
}
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