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gecko-dev/dom/html/nsGenericHTMLElement.h

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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/. */
#ifndef nsGenericHTMLElement_h___
#define nsGenericHTMLElement_h___
#include "mozilla/Attributes.h"
#include "mozilla/EventForwards.h"
#include "nsMappedAttributeElement.h"
#include "nsIDOMElement.h"
#include "nsNameSpaceManager.h" // for kNameSpaceID_None
#include "nsIFormControl.h"
#include "nsGkAtoms.h"
#include "nsContentCreatorFunctions.h"
#include "mozilla/ErrorResult.h"
#include "mozilla/dom/BindingDeclarations.h"
#include "mozilla/dom/DOMRect.h"
#include "mozilla/dom/ValidityState.h"
#include "mozilla/dom/Element.h"
class nsDOMTokenList;
class nsIFormControlFrame;
class nsIFrame;
class nsILayoutHistoryState;
class nsIURI;
struct nsSize;
namespace mozilla {
class EventChainPostVisitor;
class EventChainPreVisitor;
class EventChainVisitor;
class EventListenerManager;
class EventStates;
class TextEditor;
class PresState;
namespace dom {
class HTMLFormElement;
class HTMLMenuElement;
} // namespace dom
} // namespace mozilla
typedef nsMappedAttributeElement nsGenericHTMLElementBase;
/**
* A common superclass for HTML elements
*/
class nsGenericHTMLElement : public nsGenericHTMLElementBase,
public nsIDOMElement
{
public:
using Element::SetTabIndex;
using Element::Focus;
explicit nsGenericHTMLElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
: nsGenericHTMLElementBase(aNodeInfo)
{
NS_ASSERTION(mNodeInfo->NamespaceID() == kNameSpaceID_XHTML,
"Unexpected namespace");
AddStatesSilently(NS_EVENT_STATE_LTR);
SetFlags(NODE_HAS_DIRECTION_LTR);
}
NS_DECL_ISUPPORTS_INHERITED
NS_IMPL_FROMNODE(nsGenericHTMLElement, kNameSpaceID_XHTML)
// From Element
nsresult CopyInnerTo(mozilla::dom::Element* aDest, bool aPreallocateChildren);
void GetTitle(mozilla::dom::DOMString& aTitle)
{
GetHTMLAttr(nsGkAtoms::title, aTitle);
}
void SetTitle(const nsAString& aTitle)
{
SetHTMLAttr(nsGkAtoms::title, aTitle);
}
void GetLang(mozilla::dom::DOMString& aLang)
{
GetHTMLAttr(nsGkAtoms::lang, aLang);
}
void SetLang(const nsAString& aLang)
{
SetHTMLAttr(nsGkAtoms::lang, aLang);
}
void GetDir(nsAString& aDir)
{
GetHTMLEnumAttr(nsGkAtoms::dir, aDir);
}
void SetDir(const nsAString& aDir, mozilla::ErrorResult& aError)
{
SetHTMLAttr(nsGkAtoms::dir, aDir, aError);
}
bool Hidden() const
{
return GetBoolAttr(nsGkAtoms::hidden);
}
void SetHidden(bool aHidden, mozilla::ErrorResult& aError)
{
SetHTMLBoolAttr(nsGkAtoms::hidden, aHidden, aError);
}
void Click(mozilla::dom::CallerType aCallerType);
void GetAccessKey(nsString& aAccessKey)
{
GetHTMLAttr(nsGkAtoms::accesskey, aAccessKey);
}
void SetAccessKey(const nsAString& aAccessKey, mozilla::ErrorResult& aError)
{
SetHTMLAttr(nsGkAtoms::accesskey, aAccessKey, aError);
}
void GetAccessKeyLabel(nsString& aAccessKeyLabel);
virtual bool Draggable() const
{
return AttrValueIs(kNameSpaceID_None, nsGkAtoms::draggable,
nsGkAtoms::_true, eIgnoreCase);
}
void SetDraggable(bool aDraggable, mozilla::ErrorResult& aError)
{
SetHTMLAttr(nsGkAtoms::draggable,
aDraggable ? NS_LITERAL_STRING("true")
: NS_LITERAL_STRING("false"),
aError);
}
void GetContentEditable(nsString& aContentEditable)
{
ContentEditableTristate value = GetContentEditableValue();
if (value == eTrue) {
aContentEditable.AssignLiteral("true");
} else if (value == eFalse) {
aContentEditable.AssignLiteral("false");
} else {
aContentEditable.AssignLiteral("inherit");
}
}
void SetContentEditable(const nsAString& aContentEditable,
mozilla::ErrorResult& aError)
{
if (aContentEditable.LowerCaseEqualsLiteral("inherit")) {
UnsetHTMLAttr(nsGkAtoms::contenteditable, aError);
} else if (aContentEditable.LowerCaseEqualsLiteral("true")) {
SetHTMLAttr(nsGkAtoms::contenteditable, NS_LITERAL_STRING("true"), aError);
} else if (aContentEditable.LowerCaseEqualsLiteral("false")) {
SetHTMLAttr(nsGkAtoms::contenteditable, NS_LITERAL_STRING("false"), aError);
} else {
aError.Throw(NS_ERROR_DOM_SYNTAX_ERR);
}
}
bool IsContentEditable()
{
for (nsIContent* node = this; node; node = node->GetParent()) {
nsGenericHTMLElement* element = FromNode(node);
if (element) {
ContentEditableTristate value = element->GetContentEditableValue();
if (value != eInherit) {
return value == eTrue;
}
}
}
return false;
}
/**
* Returns the count of descendants (inclusive of this node) in
* the uncomposed document that are explicitly set as editable.
*/
uint32_t EditableInclusiveDescendantCount();
mozilla::dom::HTMLMenuElement* GetContextMenu() const;
bool Spellcheck();
void SetSpellcheck(bool aSpellcheck, mozilla::ErrorResult& aError)
{
SetHTMLAttr(nsGkAtoms::spellcheck,
aSpellcheck ? NS_LITERAL_STRING("true")
: NS_LITERAL_STRING("false"),
aError);
}
MOZ_CAN_RUN_SCRIPT
void GetInnerText(mozilla::dom::DOMString& aValue, mozilla::ErrorResult& aError);
void SetInnerText(const nsAString& aValue);
/**
* Determine whether an attribute is an event (onclick, etc.)
* @param aName the attribute
* @return whether the name is an event handler name
*/
virtual bool IsEventAttributeNameInternal(nsAtom* aName) override;
#define EVENT(name_, id_, type_, struct_) /* nothing; handled by nsINode */
// The using nsINode::Get/SetOn* are to avoid warnings about shadowing the XPCOM
// getter and setter on nsINode.
#define FORWARDED_EVENT(name_, id_, type_, struct_) \
using nsINode::GetOn##name_; \
using nsINode::SetOn##name_; \
mozilla::dom::EventHandlerNonNull* GetOn##name_(); \
void SetOn##name_(mozilla::dom::EventHandlerNonNull* handler);
#define ERROR_EVENT(name_, id_, type_, struct_) \
using nsINode::GetOn##name_; \
using nsINode::SetOn##name_; \
already_AddRefed<mozilla::dom::EventHandlerNonNull> GetOn##name_(); \
void SetOn##name_(mozilla::dom::EventHandlerNonNull* handler);
#include "mozilla/EventNameList.h" // IWYU pragma: keep
#undef ERROR_EVENT
#undef FORWARDED_EVENT
#undef EVENT
mozilla::dom::Element* GetOffsetParent()
{
mozilla::CSSIntRect rcFrame;
return GetOffsetRect(rcFrame);
}
int32_t OffsetTop()
{
mozilla::CSSIntRect rcFrame;
GetOffsetRect(rcFrame);
return rcFrame.y;
}
int32_t OffsetLeft()
{
mozilla::CSSIntRect rcFrame;
GetOffsetRect(rcFrame);
return rcFrame.x;
}
int32_t OffsetWidth()
{
mozilla::CSSIntRect rcFrame;
GetOffsetRect(rcFrame);
return rcFrame.Width();
}
int32_t OffsetHeight()
{
mozilla::CSSIntRect rcFrame;
GetOffsetRect(rcFrame);
return rcFrame.Height();
}
// These methods are already implemented in nsIContent but we want something
// faster for HTMLElements ignoring the namespace checking.
// This is safe because we already know that we are in the HTML namespace.
inline bool IsHTMLElement() const
{
return true;
}
inline bool IsHTMLElement(nsAtom* aTag) const
{
return mNodeInfo->Equals(aTag);
}
template<typename First, typename... Args>
inline bool IsAnyOfHTMLElements(First aFirst, Args... aArgs) const
{
return IsNodeInternal(aFirst, aArgs...);
}
protected:
virtual ~nsGenericHTMLElement() {}
public:
/**
* Get width and height, using given image request if attributes are unset.
* Pass a reference to the image request, since the method may change the
* value and we want to use the updated value.
*/
MOZ_CAN_RUN_SCRIPT
nsSize GetWidthHeightForImage(RefPtr<imgRequestProxy>& aImageRequest);
virtual nsIDOMNode* AsDOMNode() override { return this; }
public:
// Implementation for nsIContent
virtual nsresult BindToTree(nsIDocument* aDocument, nsIContent* aParent,
nsIContent* aBindingParent,
bool aCompileEventHandlers) override;
virtual void UnbindFromTree(bool aDeep = true,
bool aNullParent = true) override;
virtual bool IsFocusableInternal(int32_t *aTabIndex, bool aWithMouse) override
{
bool isFocusable = false;
IsHTMLFocusable(aWithMouse, &isFocusable, aTabIndex);
return isFocusable;
}
/**
* Returns true if a subclass is not allowed to override the value returned
* in aIsFocusable.
*/
virtual bool IsHTMLFocusable(bool aWithMouse,
bool *aIsFocusable,
int32_t *aTabIndex);
virtual bool PerformAccesskey(bool aKeyCausesActivation,
bool aIsTrustedEvent) override;
/**
* Check if an event for an anchor can be handled
* @return true if the event can be handled, false otherwise
*/
bool CheckHandleEventForAnchorsPreconditions(
mozilla::EventChainVisitor& aVisitor);
void GetEventTargetParentForAnchors(mozilla::EventChainPreVisitor& aVisitor);
nsresult PostHandleEventForAnchors(mozilla::EventChainPostVisitor& aVisitor);
bool IsHTMLLink(nsIURI** aURI) const;
// HTML element methods
void Compact() { mAttrsAndChildren.Compact(); }
virtual void UpdateEditableState(bool aNotify) override;
virtual mozilla::EventStates IntrinsicState() const override;
// Helper for setting our editable flag and notifying
void DoSetEditableFlag(bool aEditable, bool aNotify) {
SetEditableFlag(aEditable);
UpdateState(aNotify);
}
virtual bool ParseAttribute(int32_t aNamespaceID,
nsAtom* aAttribute,
const nsAString& aValue,
nsIPrincipal* aMaybeScriptedPrincipal,
nsAttrValue& aResult) override;
bool ParseBackgroundAttribute(int32_t aNamespaceID,
nsAtom* aAttribute,
const nsAString& aValue,
nsAttrValue& aResult);
NS_IMETHOD_(bool) IsAttributeMapped(const nsAtom* aAttribute) const override;
virtual nsMapRuleToAttributesFunc GetAttributeMappingFunction() const override;
/**
* Get the base target for any links within this piece
* of content. Generally, this is the document's base target,
* but certain content carries a local base for backward
* compatibility.
*
* @param aBaseTarget the base target [OUT]
*/
void GetBaseTarget(nsAString& aBaseTarget) const;
/**
* Get the primary form control frame for this element. Same as
* GetPrimaryFrame(), except it QI's to nsIFormControlFrame.
*
* @param aFlush whether to flush out frames so that they're up to date.
* @return the primary frame as nsIFormControlFrame
*/
nsIFormControlFrame* GetFormControlFrame(bool aFlushFrames);
//----------------------------------------
/**
* Parse an alignment attribute (top/middle/bottom/baseline)
*
* @param aString the string to parse
* @param aResult the resulting HTMLValue
* @return whether the value was parsed
*/
static bool ParseAlignValue(const nsAString& aString,
nsAttrValue& aResult);
/**
* Parse a div align string to value (left/right/center/middle/justify)
*
* @param aString the string to parse
* @param aResult the resulting HTMLValue
* @return whether the value was parsed
*/
static bool ParseDivAlignValue(const nsAString& aString,
nsAttrValue& aResult);
/**
* Convert a table halign string to value (left/right/center/char/justify)
*
* @param aString the string to parse
* @param aResult the resulting HTMLValue
* @return whether the value was parsed
*/
static bool ParseTableHAlignValue(const nsAString& aString,
nsAttrValue& aResult);
/**
* Convert a table cell halign string to value
*
* @param aString the string to parse
* @param aResult the resulting HTMLValue
* @return whether the value was parsed
*/
static bool ParseTableCellHAlignValue(const nsAString& aString,
nsAttrValue& aResult);
/**
* Convert a table valign string to value (left/right/center/char/justify/
* abscenter/absmiddle/middle)
*
* @param aString the string to parse
* @param aResult the resulting HTMLValue
* @return whether the value was parsed
*/
static bool ParseTableVAlignValue(const nsAString& aString,
nsAttrValue& aResult);
/**
* Convert an image attribute to value (width, height, hspace, vspace, border)
*
* @param aAttribute the attribute to parse
* @param aString the string to parse
* @param aResult the resulting HTMLValue
* @return whether the value was parsed
*/
static bool ParseImageAttribute(nsAtom* aAttribute,
const nsAString& aString,
nsAttrValue& aResult);
static bool ParseReferrerAttribute(const nsAString& aString,
nsAttrValue& aResult);
/**
* Convert a frameborder string to value (yes/no/1/0)
*
* @param aString the string to parse
* @param aResult the resulting HTMLValue
* @return whether the value was parsed
*/
static bool ParseFrameborderValue(const nsAString& aString,
nsAttrValue& aResult);
/**
* Convert a scrolling string to value (yes/no/on/off/scroll/noscroll/auto)
*
* @param aString the string to parse
* @param aResult the resulting HTMLValue
* @return whether the value was parsed
*/
static bool ParseScrollingValue(const nsAString& aString,
nsAttrValue& aResult);
/*
* Attribute Mapping Helpers
*/
/**
* A style attribute mapping function for the most common attributes, to be
* called by subclasses' attribute mapping functions. Currently handles
* dir, lang and hidden, could handle others.
*
* @param aAttributes the list of attributes to map
* @param aData the returned rule data [INOUT]
* @see GetAttributeMappingFunction
*/
static void MapCommonAttributesInto(const nsMappedAttributes* aAttributes,
mozilla::GenericSpecifiedValues* aGenericData);
/**
* Same as MapCommonAttributesInto except that it does not handle hidden.
*
* @param aAttributes the list of attributes to map
* @param aData the returned rule data [INOUT]
* @see GetAttributeMappingFunction
*/
static void MapCommonAttributesIntoExceptHidden(const nsMappedAttributes* aAttributes,
mozilla::GenericSpecifiedValues* aGenericData);
static const MappedAttributeEntry sCommonAttributeMap[];
static const MappedAttributeEntry sImageMarginSizeAttributeMap[];
static const MappedAttributeEntry sImageBorderAttributeMap[];
static const MappedAttributeEntry sImageAlignAttributeMap[];
static const MappedAttributeEntry sDivAlignAttributeMap[];
static const MappedAttributeEntry sBackgroundAttributeMap[];
static const MappedAttributeEntry sBackgroundColorAttributeMap[];
/**
* Helper to map the align attribute into a style struct.
*
* @param aAttributes the list of attributes to map
* @param aData the returned rule data [INOUT]
* @see GetAttributeMappingFunction
*/
static void MapImageAlignAttributeInto(const nsMappedAttributes* aAttributes,
mozilla::GenericSpecifiedValues* aGenericData);
/**
* Helper to map the align attribute into a style struct for things
* like <div>, <h1>, etc.
*
* @param aAttributes the list of attributes to map
* @param aData the returned rule data [INOUT]
* @see GetAttributeMappingFunction
*/
static void MapDivAlignAttributeInto(const nsMappedAttributes* aAttributes,
mozilla::GenericSpecifiedValues* aGenericData);
/**
* Helper to map the valign attribute into a style struct for things
* like <col>, <tr>, <section>, etc.
*
* @param aAttributes the list of attributes to map
* @param aData the returned rule data [INOUT]
* @see GetAttributeMappingFunction
*/
static void MapVAlignAttributeInto(const nsMappedAttributes* aAttributes,
mozilla::GenericSpecifiedValues* aGenericData);
/**
* Helper to map the image border attribute into a style struct.
*
* @param aAttributes the list of attributes to map
* @param aData the returned rule data [INOUT]
* @see GetAttributeMappingFunction
*/
static void MapImageBorderAttributeInto(const nsMappedAttributes* aAttributes,
mozilla::GenericSpecifiedValues* aGenericData);
/**
* Helper to map the image margin attribute into a style struct.
*
* @param aAttributes the list of attributes to map
* @param aData the returned rule data [INOUT]
* @see GetAttributeMappingFunction
*/
static void MapImageMarginAttributeInto(const nsMappedAttributes* aAttributes,
mozilla::GenericSpecifiedValues* aGenericData);
/**
* Helper to map the image position attribute into a style struct.
*
* @param aAttributes the list of attributes to map
* @param aData the returned rule data [INOUT]
* @see GetAttributeMappingFunction
*/
static void MapImageSizeAttributesInto(const nsMappedAttributes* aAttributes,
mozilla::GenericSpecifiedValues* aGenericData);
/**
* Helper to map `width` attribute into a style struct.
*
* @param aAttributes the list of attributes to map
* @param aData the returned rule data [INOUT]
* @see GetAttributeMappingFunction
*/
static void MapWidthAttributeInto(const nsMappedAttributes* aAttributes,
mozilla::GenericSpecifiedValues* aGenericData);
/**
* Helper to map `height` attribute into a style struct.
*
* @param aAttributes the list of attributes to map
* @param aData the returned rule data [INOUT]
* @see GetAttributeMappingFunction
*/
static void MapHeightAttributeInto(const nsMappedAttributes* aAttributes,
mozilla::GenericSpecifiedValues* aGenericData);
/**
* Helper to map the background attribute
* into a style struct.
*
* @param aAttributes the list of attributes to map
* @param aData the returned rule data [INOUT]
* @see GetAttributeMappingFunction
*/
static void MapBackgroundInto(const nsMappedAttributes* aAttributes,
mozilla::GenericSpecifiedValues* aGenericData);
/**
* Helper to map the bgcolor attribute
* into a style struct.
*
* @param aAttributes the list of attributes to map
* @param aData the returned rule data [INOUT]
* @see GetAttributeMappingFunction
*/
static void MapBGColorInto(const nsMappedAttributes* aAttributes,
mozilla::GenericSpecifiedValues* aGenericData);
/**
* Helper to map the background attributes (currently background and bgcolor)
* into a style struct.
*
* @param aAttributes the list of attributes to map
* @param aData the returned rule data [INOUT]
* @see GetAttributeMappingFunction
*/
static void MapBackgroundAttributesInto(const nsMappedAttributes* aAttributes,
mozilla::GenericSpecifiedValues* aGenericData);
/**
* Helper to map the scrolling attribute on FRAME and IFRAME
* into a style struct.
*
* @param aAttributes the list of attributes to map
* @param aData the returned rule data [INOUT]
* @see GetAttributeMappingFunction
*/
static void MapScrollingAttributeInto(const nsMappedAttributes* aAttributes,
mozilla::GenericSpecifiedValues* aGenericData);
/**
* Get the presentation context for this content node.
* @return the presentation context
*/
enum PresContextFor
{
eForComposedDoc,
eForUncomposedDoc
};
nsPresContext* GetPresContext(PresContextFor aFor);
// Form Helper Routines
/**
* Find an ancestor of this content node which is a form (could be null)
* @param aCurrentForm the current form for this node. If this is
* non-null, and no ancestor form is found, and the current form is in
* a connected subtree with the node, the current form will be
* returned. This is needed to handle cases when HTML elements have a
* current form that they're not descendants of.
* @note This method should not be called if the element has a form attribute.
*/
mozilla::dom::HTMLFormElement*
FindAncestorForm(mozilla::dom::HTMLFormElement* aCurrentForm = nullptr);
virtual void RecompileScriptEventListeners() override;
/**
* See if the document being tested has nav-quirks mode enabled.
* @param doc the document
*/
static bool InNavQuirksMode(nsIDocument* aDoc);
/**
* Gets the absolute URI value of an attribute, by resolving any relative
* URIs in the attribute against the baseuri of the element. If the attribute
* isn't a relative URI the value of the attribute is returned as is. Only
* works for attributes in null namespace.
*
* @param aAttr name of attribute.
* @param aBaseAttr name of base attribute.
* @param aResult result value [out]
*/
void GetURIAttr(nsAtom* aAttr, nsAtom* aBaseAttr, nsAString& aResult) const;
/**
* Gets the absolute URI values of an attribute, by resolving any relative
* URIs in the attribute against the baseuri of the element. If a substring
* isn't a relative URI, the substring is returned as is. Only works for
* attributes in null namespace.
*/
bool GetURIAttr(nsAtom* aAttr, nsAtom* aBaseAttr, nsIURI** aURI) const;
/**
* Returns the current disabled state of the element.
*
* TODO(emilio): Consider moving to Element?
*/
bool IsDisabled() const {
return State().HasState(NS_EVENT_STATE_DISABLED);
}
bool IsHidden() const
{
return HasAttr(kNameSpaceID_None, nsGkAtoms::hidden);
}
virtual bool IsLabelable() const override;
static bool MatchLabelsElement(Element* aElement, int32_t aNamespaceID,
nsAtom* aAtom, void* aData);
already_AddRefed<nsINodeList> Labels();
virtual bool IsInteractiveHTMLContent(bool aIgnoreTabindex) const override;
static bool TouchEventsEnabled(JSContext* /* unused */, JSObject* /* unused */);
static inline bool
CanHaveName(nsAtom* aTag)
{
return aTag == nsGkAtoms::img ||
aTag == nsGkAtoms::form ||
aTag == nsGkAtoms::embed ||
aTag == nsGkAtoms::object;
}
static inline bool
ShouldExposeNameAsHTMLDocumentProperty(Element* aElement)
{
return aElement->IsHTMLElement() &&
CanHaveName(aElement->NodeInfo()->NameAtom());
}
static inline bool
ShouldExposeIdAsHTMLDocumentProperty(Element* aElement)
{
if (aElement->IsHTMLElement(nsGkAtoms::object)) {
return true;
}
// Per spec, <img> is exposed by id only if it also has a nonempty
// name (which doesn't have to match the id or anything).
// HasName() is true precisely when name is nonempty.
return aElement->IsHTMLElement(nsGkAtoms::img) && aElement->HasName();
}
protected:
/**
* Add/remove this element to the documents name cache
*/
void AddToNameTable(nsAtom* aName);
void RemoveFromNameTable();
/**
* Register or unregister an access key to this element based on the
* accesskey attribute.
*/
void RegAccessKey()
{
if (HasFlag(NODE_HAS_ACCESSKEY)) {
RegUnRegAccessKey(true);
}
}
void UnregAccessKey()
{
if (HasFlag(NODE_HAS_ACCESSKEY)) {
RegUnRegAccessKey(false);
}
}
private:
void RegUnRegAccessKey(bool aDoReg);
protected:
virtual nsresult BeforeSetAttr(int32_t aNamespaceID, nsAtom* aName,
const nsAttrValueOrString* aValue,
bool aNotify) override;
virtual nsresult AfterSetAttr(int32_t aNamespaceID, nsAtom* aName,
const nsAttrValue* aValue,
const nsAttrValue* aOldValue,
nsIPrincipal* aMaybeScriptedPrincipal,
bool aNotify) override;
virtual mozilla::EventListenerManager*
GetEventListenerManagerForAttr(nsAtom* aAttrName,
bool* aDefer) override;
/**
* Dispatch a simulated mouse click by keyboard to the given element.
*/
nsresult DispatchSimulatedClick(nsGenericHTMLElement* aElement,
bool aIsTrusted,
nsPresContext* aPresContext);
/**
* Create a URI for the given aURISpec string.
* Returns INVALID_STATE_ERR and nulls *aURI if aURISpec is empty
* and the document's URI matches the element's base URI.
*/
nsresult NewURIFromString(const nsAString& aURISpec, nsIURI** aURI);
void GetHTMLAttr(nsAtom* aName, nsAString& aResult) const
{
GetAttr(aName, aResult);
}
void GetHTMLAttr(nsAtom* aName, mozilla::dom::DOMString& aResult) const
{
GetAttr(kNameSpaceID_None, aName, aResult);
}
void GetHTMLEnumAttr(nsAtom* aName, nsAString& aResult) const
{
GetEnumAttr(aName, nullptr, aResult);
}
void GetHTMLURIAttr(nsAtom* aName, nsAString& aResult) const
{
GetURIAttr(aName, nullptr, aResult);
}
void SetHTMLAttr(nsAtom* aName, const nsAString& aValue)
{
SetAttr(kNameSpaceID_None, aName, aValue, true);
}
void SetHTMLAttr(nsAtom* aName, const nsAString& aValue, mozilla::ErrorResult& aError)
{
SetAttr(aName, aValue, aError);
}
void SetHTMLAttr(nsAtom* aName, const nsAString& aValue, nsIPrincipal* aTriggeringPrincipal, mozilla::ErrorResult& aError)
{
SetAttr(aName, aValue, aTriggeringPrincipal, aError);
}
void UnsetHTMLAttr(nsAtom* aName, mozilla::ErrorResult& aError)
{
UnsetAttr(aName, aError);
}
void SetHTMLBoolAttr(nsAtom* aName, bool aValue, mozilla::ErrorResult& aError)
{
if (aValue) {
SetHTMLAttr(aName, EmptyString(), aError);
} else {
UnsetHTMLAttr(aName, aError);
}
}
template<typename T>
void SetHTMLIntAttr(nsAtom* aName, T aValue, mozilla::ErrorResult& aError)
{
nsAutoString value;
value.AppendInt(aValue);
SetHTMLAttr(aName, value, aError);
}
/**
* Gets the integer-value of an attribute, returns specified default value
* if the attribute isn't set or isn't set to an integer. Only works for
* attributes in null namespace.
*
* @param aAttr name of attribute.
* @param aDefault default-value to return if attribute isn't set.
*/
int32_t GetIntAttr(nsAtom* aAttr, int32_t aDefault) const;
/**
* Sets value of attribute to specified integer. Only works for attributes
* in null namespace.
*
* @param aAttr name of attribute.
* @param aValue Integer value of attribute.
*/
nsresult SetIntAttr(nsAtom* aAttr, int32_t aValue);
/**
* Gets the unsigned integer-value of an attribute, returns specified default
* value if the attribute isn't set or isn't set to an integer. Only works for
* attributes in null namespace.
*
* @param aAttr name of attribute.
* @param aDefault default-value to return if attribute isn't set.
*/
uint32_t GetUnsignedIntAttr(nsAtom* aAttr, uint32_t aDefault) const;
/**
* Sets value of attribute to specified unsigned integer. Only works for
* attributes in null namespace.
*
* @param aAttr name of attribute.
* @param aValue Integer value of attribute.
* @param aDefault Default value (in case value is out of range). If the spec
* doesn't provide one, should be 1 if the value is limited to
* nonzero values, and 0 otherwise.
*/
void SetUnsignedIntAttr(nsAtom* aName, uint32_t aValue, uint32_t aDefault,
mozilla::ErrorResult& aError)
{
nsAutoString value;
if (aValue > INT32_MAX) {
value.AppendInt(aDefault);
} else {
value.AppendInt(aValue);
}
SetHTMLAttr(aName, value, aError);
}
/**
* Sets value of attribute to specified double. Only works for attributes
* in null namespace.
*
* @param aAttr name of attribute.
* @param aValue Double value of attribute.
*/
void SetDoubleAttr(nsAtom* aAttr, double aValue, mozilla::ErrorResult& aRv)
{
nsAutoString value;
value.AppendFloat(aValue);
SetHTMLAttr(aAttr, value, aRv);
}
/**
* Locates the TextEditor associated with this node. In general this is
* equivalent to GetEditorInternal(), but for designmode or contenteditable,
* this may need to get an editor that's not actually on this element's
* associated TextControlFrame. This is used by the spellchecking routines
* to get the editor affected by changing the spellcheck attribute on this
* node.
*/
virtual already_AddRefed<mozilla::TextEditor> GetAssociatedEditor();
/**
* Get the frame's offset information for offsetTop/Left/Width/Height.
* Returns the parent the offset is relative to.
* @note This method flushes pending notifications (FlushType::Layout).
* @param aRect the offset information [OUT]
*/
mozilla::dom::Element* GetOffsetRect(mozilla::CSSIntRect& aRect);
/**
* Ensures all editors associated with a subtree are synced, for purposes of
* spellchecking.
*/
static void SyncEditorsOnSubtree(nsIContent* content);
enum ContentEditableTristate {
eInherit = -1,
eFalse = 0,
eTrue = 1
};
/**
* Returns eTrue if the element has a contentEditable attribute and its value
* is "true" or an empty string. Returns eFalse if the element has a
* contentEditable attribute and its value is "false". Otherwise returns
* eInherit.
*/
ContentEditableTristate GetContentEditableValue() const
{
static const Element::AttrValuesArray values[] =
{ &nsGkAtoms::_false, &nsGkAtoms::_true, &nsGkAtoms::_empty, nullptr };
if (!MayHaveContentEditableAttr())
return eInherit;
int32_t value = FindAttrValueIn(kNameSpaceID_None,
nsGkAtoms::contenteditable, values,
eIgnoreCase);
return value > 0 ? eTrue : (value == 0 ? eFalse : eInherit);
}
// Used by A, AREA, LINK, and STYLE.
already_AddRefed<nsIURI> GetHrefURIForAnchors() const;
/**
* Returns whether this element is an editable root. There are two types of
* editable roots:
* 1) the documentElement if the whole document is editable (for example for
* desginMode=on)
* 2) an element that is marked editable with contentEditable=true and that
* doesn't have a parent or whose parent is not editable.
* Note that this doesn't return input and textarea elements that haven't been
* made editable through contentEditable or designMode.
*/
bool IsEditableRoot() const;
private:
void ChangeEditableState(int32_t aChange);
};
namespace mozilla {
namespace dom {
class HTMLFieldSetElement;
} // namespace dom
} // namespace mozilla
#define FORM_ELEMENT_FLAG_BIT(n_) NODE_FLAG_BIT(ELEMENT_TYPE_SPECIFIC_BITS_OFFSET + (n_))
// Form element specific bits
enum {
// If this flag is set on an nsGenericHTMLFormElement or an HTMLImageElement,
// that means that we have added ourselves to our mForm. It's possible to
// have a non-null mForm, but not have this flag set. That happens when the
// form is set via the content sink.
ADDED_TO_FORM = FORM_ELEMENT_FLAG_BIT(0),
// If this flag is set on an nsGenericHTMLFormElement or an HTMLImageElement,
// that means that its form is in the process of being unbound from the tree,
// and this form element hasn't re-found its form in
// nsGenericHTMLFormElement::UnbindFromTree yet.
MAYBE_ORPHAN_FORM_ELEMENT = FORM_ELEMENT_FLAG_BIT(1),
// If this flag is set on an nsGenericHTMLElement or an HTMLImageElement, then
// the element might be in the past names map of its form.
MAY_BE_IN_PAST_NAMES_MAP = FORM_ELEMENT_FLAG_BIT(2)
};
// NOTE: I don't think it's possible to have both ADDED_TO_FORM and
// MAYBE_ORPHAN_FORM_ELEMENT set at the same time, so if it becomes an issue we
// can probably merge them into the same bit. --bz
ASSERT_NODE_FLAGS_SPACE(ELEMENT_TYPE_SPECIFIC_BITS_OFFSET + 3);
#undef FORM_ELEMENT_FLAG_BIT
/**
* A helper class for form elements that can contain children
*/
class nsGenericHTMLFormElement : public nsGenericHTMLElement,
public nsIFormControl
{
public:
nsGenericHTMLFormElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo,
uint8_t aType);
NS_DECL_ISUPPORTS_INHERITED
nsINode* GetScopeChainParent() const override;
virtual bool IsNodeOfType(uint32_t aFlags) const override;
virtual void SaveSubtreeState() override;
// nsIFormControl
virtual mozilla::dom::HTMLFieldSetElement* GetFieldSet() override;
virtual mozilla::dom::Element* GetFormElement() override;
mozilla::dom::HTMLFormElement* GetForm() const
{
return mForm;
}
virtual void SetForm(mozilla::dom::HTMLFormElement* aForm) override;
virtual void ClearForm(bool aRemoveFromForm, bool aUnbindOrDelete) override;
NS_IMETHOD SaveState() override
{
return NS_OK;
}
virtual bool RestoreState(mozilla::PresState* aState) override
{
return false;
}
virtual bool AllowDrop() override
{
return true;
}
// nsIContent
virtual nsresult BindToTree(nsIDocument* aDocument, nsIContent* aParent,
nsIContent* aBindingParent,
bool aCompileEventHandlers) override;
virtual void UnbindFromTree(bool aDeep = true,
bool aNullParent = true) override;
virtual IMEState GetDesiredIMEState() override;
virtual mozilla::EventStates IntrinsicState() const override;
void GetEventTargetParent(mozilla::EventChainPreVisitor& aVisitor) override;
virtual nsresult PreHandleEvent(
mozilla::EventChainVisitor& aVisitor) override;
/**
* This callback is called by a fieldest on all its elements whenever its
* disabled attribute is changed so the element knows its disabled state
* might have changed.
*
* @note Classes redefining this method should not do any content
* state updates themselves but should just make sure to call into
* nsGenericHTMLFormElement::FieldSetDisabledChanged.
*/
virtual void FieldSetDisabledChanged(bool aNotify);
/**
* Check our disabled content attribute and fieldset's (if it exists) disabled
* state to decide whether our disabled flag should be toggled.
*/
void UpdateDisabledState(bool aNotify);
/**
* Update our required/optional flags to match the given aIsRequired boolean.
*/
void UpdateRequiredState(bool aIsRequired, bool aNotify);
void FieldSetFirstLegendChanged(bool aNotify) {
UpdateFieldSet(aNotify);
}
/**
* This callback is called by a fieldset on all it's elements when it's being
* destroyed. When called, the elements should check that aFieldset is there
* first parent fieldset and null mFieldset in that case only.
*
* @param aFieldSet The fieldset being removed.
*/
void ForgetFieldSet(nsIContent* aFieldset);
/**
* Returns if the control can be disabled.
*/
bool CanBeDisabled() const;
/**
* Returns if the readonly attribute applies.
*/
bool DoesReadOnlyApply() const;
virtual bool IsHTMLFocusable(bool aWithMouse, bool* aIsFocusable,
int32_t* aTabIndex) override;
virtual bool IsLabelable() const override;
void GetFormAction(nsString& aValue);
protected:
virtual ~nsGenericHTMLFormElement();
virtual nsresult BeforeSetAttr(int32_t aNameSpaceID, nsAtom* aName,
const nsAttrValueOrString* aValue,
bool aNotify) override;
virtual nsresult AfterSetAttr(int32_t aNameSpaceID, nsAtom* aName,
const nsAttrValue* aValue,
const nsAttrValue* aOldValue,
nsIPrincipal* aMaybeScriptedPrincipal,
bool aNotify) override;
virtual void BeforeSetForm(bool aBindToTree) {}
virtual void AfterClearForm(bool aUnbindOrDelete) {}
void SetForm(mozilla::dom::HTMLFormElement* aForm, bool aBindToTree);
/**
* This method will update the form owner, using @form or looking to a parent.
*
* @param aBindToTree Whether the element is being attached to the tree.
* @param aFormIdElement The element associated with the id in @form. If
* aBindToTree is false, aFormIdElement *must* contain the element associated
* with the id in @form. Otherwise, it *must* be null.
*
* @note Callers of UpdateFormOwner have to be sure the element is in a
* document (GetUncomposedDoc() != nullptr).
*/
void UpdateFormOwner(bool aBindToTree, Element* aFormIdElement);
/**
* This method will update mFieldset and set it to the first fieldset parent.
*/
void UpdateFieldSet(bool aNotify);
/**
* Add a form id observer which will observe when the element with the id in
* @form will change.
*
* @return The element associated with the current id in @form (may be null).
*/
Element* AddFormIdObserver();
/**
* Remove the form id observer.
*/
void RemoveFormIdObserver();
/**
* This method is a a callback for IDTargetObserver (from nsIDocument).
* It will be called each time the element associated with the id in @form
* changes.
*/
static bool FormIdUpdated(Element* aOldElement, Element* aNewElement,
void* aData);
// Returns true if the event should not be handled from GetEventTargetParent
bool IsElementDisabledForEvents(mozilla::EventMessage aMessage,
nsIFrame* aFrame);
// The focusability state of this form control. eUnfocusable means that it
// shouldn't be focused at all, eInactiveWindow means it's in an inactive
// window, eActiveWindow means it's in an active window.
enum FocusTristate {
eUnfocusable,
eInactiveWindow,
eActiveWindow
};
// Get our focus state. If this returns eInactiveWindow, it will set this
// element as the focused element for that window.
FocusTristate FocusState();
/** The form that contains this control */
mozilla::dom::HTMLFormElement* mForm;
/* This is a pointer to our closest fieldset parent if any */
mozilla::dom::HTMLFieldSetElement* mFieldSet;
};
class nsGenericHTMLFormElementWithState : public nsGenericHTMLFormElement
{
public:
nsGenericHTMLFormElementWithState(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo,
uint8_t aType);
/**
* Get the presentation state for a piece of content, or create it if it does
* not exist. Generally used by SaveState().
*/
mozilla::PresState* GetPrimaryPresState();
/**
* Get the layout history object for a particular piece of content.
*
* @param aRead if true, won't return a layout history state if the
* layout history state is empty.
* @return the history state object
*/
already_AddRefed<nsILayoutHistoryState>
GetLayoutHistory(bool aRead);
/**
* Restore the state for a form control. Ends up calling
* nsIFormControl::RestoreState().
*
* @return false if RestoreState() was not called, the return
* value of RestoreState() otherwise.
*/
bool RestoreFormControlState();
/**
* Called when we have been cloned and adopted, and the information of the
* node has been changed.
*/
virtual void NodeInfoChanged(nsIDocument* aOldDoc) override;
protected:
/* Generates the state key for saving the form state in the session if not
computed already. The result is stored in mStateKey on success */
nsresult GenerateStateKey();
/* Used to store the key to that element in the session. Is void until
GenerateStateKey has been used */
nsCString mStateKey;
};
#define NS_INTERFACE_MAP_ENTRY_IF_TAG(_interface, _tag) \
NS_INTERFACE_MAP_ENTRY_CONDITIONAL(_interface, \
mNodeInfo->Equals(nsGkAtoms::_tag))
namespace mozilla {
namespace dom {
typedef nsGenericHTMLElement* (*HTMLContentCreatorFunction)(
already_AddRefed<mozilla::dom::NodeInfo>&&,
mozilla::dom::FromParser aFromParser);
} // namespace dom
} // namespace mozilla
/**
* A macro to declare the NS_NewHTMLXXXElement() functions.
*/
#define NS_DECLARE_NS_NEW_HTML_ELEMENT(_elementName) \
namespace mozilla { \
namespace dom { \
class HTML##_elementName##Element; \
} \
} \
nsGenericHTMLElement* \
NS_NewHTML##_elementName##Element(already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo, \
mozilla::dom::FromParser aFromParser = mozilla::dom::NOT_FROM_PARSER);
#define NS_DECLARE_NS_NEW_HTML_ELEMENT_AS_SHARED(_elementName) \
inline nsGenericHTMLElement* \
NS_NewHTML##_elementName##Element(already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo, \
mozilla::dom::FromParser aFromParser = mozilla::dom::NOT_FROM_PARSER) \
{ \
return NS_NewHTMLSharedElement(mozilla::Move(aNodeInfo), aFromParser); \
}
/**
* A macro to implement the NS_NewHTMLXXXElement() functions.
*/
#define NS_IMPL_NS_NEW_HTML_ELEMENT(_elementName) \
nsGenericHTMLElement* \
NS_NewHTML##_elementName##Element(already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo, \
mozilla::dom::FromParser aFromParser) \
{ \
return new mozilla::dom::HTML##_elementName##Element(aNodeInfo); \
}
#define NS_IMPL_NS_NEW_HTML_ELEMENT_CHECK_PARSER(_elementName) \
nsGenericHTMLElement* \
NS_NewHTML##_elementName##Element(already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo, \
mozilla::dom::FromParser aFromParser) \
{ \
return new mozilla::dom::HTML##_elementName##Element(aNodeInfo, \
aFromParser); \
}
// Here, we expand 'NS_DECLARE_NS_NEW_HTML_ELEMENT()' by hand.
// (Calling the macro directly (with no args) produces compiler warnings.)
nsGenericHTMLElement*
NS_NewHTMLElement(already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo,
mozilla::dom::FromParser aFromParser = mozilla::dom::NOT_FROM_PARSER);
// Distinct from the above in order to have function pointer that compared unequal
// to a function pointer to the above.
nsGenericHTMLElement*
NS_NewCustomElement(
already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo,
mozilla::dom::FromParser aFromParser = mozilla::dom::NOT_FROM_PARSER);
NS_DECLARE_NS_NEW_HTML_ELEMENT(Shared)
NS_DECLARE_NS_NEW_HTML_ELEMENT(SharedList)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Anchor)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Area)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Audio)
NS_DECLARE_NS_NEW_HTML_ELEMENT(BR)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Body)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Button)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Canvas)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Content)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Mod)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Data)
NS_DECLARE_NS_NEW_HTML_ELEMENT(DataList)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Details)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Dialog)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Div)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Embed)
NS_DECLARE_NS_NEW_HTML_ELEMENT(FieldSet)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Font)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Form)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Frame)
NS_DECLARE_NS_NEW_HTML_ELEMENT(FrameSet)
NS_DECLARE_NS_NEW_HTML_ELEMENT(HR)
NS_DECLARE_NS_NEW_HTML_ELEMENT_AS_SHARED(Head)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Heading)
NS_DECLARE_NS_NEW_HTML_ELEMENT_AS_SHARED(Html)
NS_DECLARE_NS_NEW_HTML_ELEMENT(IFrame)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Image)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Input)
NS_DECLARE_NS_NEW_HTML_ELEMENT(LI)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Label)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Legend)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Link)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Map)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Menu)
NS_DECLARE_NS_NEW_HTML_ELEMENT(MenuItem)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Meta)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Meter)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Object)
NS_DECLARE_NS_NEW_HTML_ELEMENT(OptGroup)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Option)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Output)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Paragraph)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Picture)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Pre)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Progress)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Script)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Select)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Slot)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Source)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Span)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Style)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Summary)
NS_DECLARE_NS_NEW_HTML_ELEMENT(TableCaption)
NS_DECLARE_NS_NEW_HTML_ELEMENT(TableCell)
NS_DECLARE_NS_NEW_HTML_ELEMENT(TableCol)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Table)
NS_DECLARE_NS_NEW_HTML_ELEMENT(TableRow)
NS_DECLARE_NS_NEW_HTML_ELEMENT(TableSection)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Tbody)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Template)
NS_DECLARE_NS_NEW_HTML_ELEMENT(TextArea)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Tfoot)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Thead)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Time)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Title)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Track)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Unknown)
NS_DECLARE_NS_NEW_HTML_ELEMENT(Video)
inline nsISupports*
ToSupports(nsGenericHTMLElement* aHTMLElement)
{
return static_cast<nsIContent*>(aHTMLElement);
}
inline nsISupports*
ToCanonicalSupports(nsGenericHTMLElement* aHTMLElement)
{
return static_cast<nsIContent*>(aHTMLElement);
}
#endif /* nsGenericHTMLElement_h___ */
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