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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
/*
The base XUL element class and associates.
*/
#ifndef nsXULElement_h__
#define nsXULElement_h__
#include "js/SourceText.h"
#include "js/TracingAPI.h"
#include "mozilla/Attributes.h"
#include "nsAtom.h"
#include "mozilla/dom/NodeInfo.h"
#include "nsIControllers.h"
#include "nsIURI.h"
#include "nsLayoutCID.h"
#include "AttrArray.h"
#include "nsGkAtoms.h"
#include "nsStringFwd.h"
#include "nsStyledElement.h"
#include "mozilla/dom/DOMRect.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/DOMString.h"
#include "mozilla/dom/FromParser.h"
class nsXULPrototypeDocument;
class nsIObjectInputStream;
class nsIObjectOutputStream;
class nsIOffThreadScriptReceiver;
class nsXULPrototypeNode;
typedef nsTArray<RefPtr<nsXULPrototypeNode>> nsPrototypeArray;
namespace mozilla {
class EventChainPreVisitor;
class EventListenerManager;
namespace css {
class StyleRule;
} // namespace css
namespace dom {
class HTMLIFrameElement;
class PrototypeDocumentContentSink;
enum class CallerType : uint32_t;
} // namespace dom
} // namespace mozilla
////////////////////////////////////////////////////////////////////////
#ifdef XUL_PROTOTYPE_ATTRIBUTE_METERING
# define XUL_PROTOTYPE_ATTRIBUTE_METER(counter) \
(nsXULPrototypeAttribute::counter++)
#else
# define XUL_PROTOTYPE_ATTRIBUTE_METER(counter) ((void)0)
#endif
/**
A prototype attribute for an nsXULPrototypeElement.
*/
class nsXULPrototypeAttribute {
public:
nsXULPrototypeAttribute()
: mName(nsGkAtoms::id) // XXX this is a hack, but names have to have a
// value
{
XUL_PROTOTYPE_ATTRIBUTE_METER(gNumAttributes);
MOZ_COUNT_CTOR(nsXULPrototypeAttribute);
}
~nsXULPrototypeAttribute();
nsAttrName mName;
nsAttrValue mValue;
#ifdef XUL_PROTOTYPE_ATTRIBUTE_METERING
static uint32_t gNumElements;
static uint32_t gNumAttributes;
static uint32_t gNumCacheTests;
static uint32_t gNumCacheHits;
static uint32_t gNumCacheSets;
static uint32_t gNumCacheFills;
#endif /* !XUL_PROTOTYPE_ATTRIBUTE_METERING */
};
/**
A prototype content model element that holds the "primordial" values
that have been parsed from the original XUL document.
*/
class nsXULPrototypeNode {
public:
enum Type { eType_Element, eType_Script, eType_Text, eType_PI };
Type mType;
virtual nsresult Serialize(
nsIObjectOutputStream* aStream, nsXULPrototypeDocument* aProtoDoc,
const nsTArray<RefPtr<mozilla::dom::NodeInfo>>* aNodeInfos) = 0;
virtual nsresult Deserialize(
nsIObjectInputStream* aStream, nsXULPrototypeDocument* aProtoDoc,
nsIURI* aDocumentURI,
const nsTArray<RefPtr<mozilla::dom::NodeInfo>>* aNodeInfos) = 0;
/**
* The prototype document must call ReleaseSubtree when it is going
* away. This makes the parents through the tree stop owning their
* children, whether or not the parent's reference count is zero.
* Individual elements may still own individual prototypes, but
* those prototypes no longer remember their children to allow them
* to be constructed.
*/
virtual void ReleaseSubtree() {}
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(nsXULPrototypeNode)
NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(nsXULPrototypeNode)
protected:
explicit nsXULPrototypeNode(Type aType) : mType(aType) {}
virtual ~nsXULPrototypeNode() = default;
};
class nsXULPrototypeElement : public nsXULPrototypeNode {
public:
explicit nsXULPrototypeElement(mozilla::dom::NodeInfo* aNodeInfo = nullptr)
: nsXULPrototypeNode(eType_Element),
mNodeInfo(aNodeInfo),
mHasIdAttribute(false),
mHasClassAttribute(false),
mHasStyleAttribute(false),
mIsAtom(nullptr) {}
private:
virtual ~nsXULPrototypeElement() { Unlink(); }
public:
virtual void ReleaseSubtree() override {
for (int32_t i = mChildren.Length() - 1; i >= 0; i--) {
if (mChildren[i].get()) mChildren[i]->ReleaseSubtree();
}
mChildren.Clear();
nsXULPrototypeNode::ReleaseSubtree();
}
virtual nsresult Serialize(
nsIObjectOutputStream* aStream, nsXULPrototypeDocument* aProtoDoc,
const nsTArray<RefPtr<mozilla::dom::NodeInfo>>* aNodeInfos) override;
virtual nsresult Deserialize(
nsIObjectInputStream* aStream, nsXULPrototypeDocument* aProtoDoc,
nsIURI* aDocumentURI,
const nsTArray<RefPtr<mozilla::dom::NodeInfo>>* aNodeInfos) override;
nsresult SetAttrAt(uint32_t aPos, const nsAString& aValue,
nsIURI* aDocumentURI);
void Unlink();
// Trace all scripts held by this element and its children.
void TraceAllScripts(JSTracer* aTrc);
nsPrototypeArray mChildren;
RefPtr<mozilla::dom::NodeInfo> mNodeInfo;
uint32_t mHasIdAttribute : 1;
uint32_t mHasClassAttribute : 1;
uint32_t mHasStyleAttribute : 1;
nsTArray<nsXULPrototypeAttribute> mAttributes; // [OWNER]
RefPtr<nsAtom> mIsAtom;
};
class nsXULPrototypeScript : public nsXULPrototypeNode {
public:
explicit nsXULPrototypeScript(uint32_t aLineNo);
private:
virtual ~nsXULPrototypeScript();
public:
virtual nsresult Serialize(
nsIObjectOutputStream* aStream, nsXULPrototypeDocument* aProtoDoc,
const nsTArray<RefPtr<mozilla::dom::NodeInfo>>* aNodeInfos) override;
nsresult SerializeOutOfLine(nsIObjectOutputStream* aStream,
nsXULPrototypeDocument* aProtoDoc);
virtual nsresult Deserialize(
nsIObjectInputStream* aStream, nsXULPrototypeDocument* aProtoDoc,
nsIURI* aDocumentURI,
const nsTArray<RefPtr<mozilla::dom::NodeInfo>>* aNodeInfos) override;
nsresult DeserializeOutOfLine(nsIObjectInputStream* aInput,
nsXULPrototypeDocument* aProtoDoc);
nsresult Compile(const char16_t* aText, size_t aTextLength,
JS::SourceOwnership aOwnership, nsIURI* aURI,
uint32_t aLineNo, mozilla::dom::Document* aDocument,
nsIOffThreadScriptReceiver* aOffThreadReceiver = nullptr);
void UnlinkJSObjects();
void Set(JSScript* aObject);
bool HasScriptObject() {
// Conversion to bool doesn't trigger mScriptObject's read barrier.
return mScriptObject;
}
JSScript* GetScriptObject() { return mScriptObject; }
void TraceScriptObject(JSTracer* aTrc) {
JS::TraceEdge(aTrc, &mScriptObject, "active window XUL prototype script");
}
void Trace(const TraceCallbacks& aCallbacks, void* aClosure) {
if (mScriptObject) {
aCallbacks.Trace(&mScriptObject, "mScriptObject", aClosure);
}
}
nsCOMPtr<nsIURI> mSrcURI;
uint32_t mLineNo;
bool mSrcLoading;
bool mOutOfLine;
mozilla::dom::PrototypeDocumentContentSink*
mSrcLoadWaiters; // [OWNER] but not COMPtr
private:
JS::Heap<JSScript*> mScriptObject;
};
class nsXULPrototypeText : public nsXULPrototypeNode {
public:
nsXULPrototypeText() : nsXULPrototypeNode(eType_Text) {}
private:
virtual ~nsXULPrototypeText() = default;
public:
virtual nsresult Serialize(
nsIObjectOutputStream* aStream, nsXULPrototypeDocument* aProtoDoc,
const nsTArray<RefPtr<mozilla::dom::NodeInfo>>* aNodeInfos) override;
virtual nsresult Deserialize(
nsIObjectInputStream* aStream, nsXULPrototypeDocument* aProtoDoc,
nsIURI* aDocumentURI,
const nsTArray<RefPtr<mozilla::dom::NodeInfo>>* aNodeInfos) override;
nsString mValue;
};
class nsXULPrototypePI : public nsXULPrototypeNode {
public:
nsXULPrototypePI() : nsXULPrototypeNode(eType_PI) {}
private:
virtual ~nsXULPrototypePI() = default;
public:
virtual nsresult Serialize(
nsIObjectOutputStream* aStream, nsXULPrototypeDocument* aProtoDoc,
const nsTArray<RefPtr<mozilla::dom::NodeInfo>>* aNodeInfos) override;
virtual nsresult Deserialize(
nsIObjectInputStream* aStream, nsXULPrototypeDocument* aProtoDoc,
nsIURI* aDocumentURI,
const nsTArray<RefPtr<mozilla::dom::NodeInfo>>* aNodeInfos) override;
nsString mTarget;
nsString mData;
};
////////////////////////////////////////////////////////////////////////
/**
The XUL element.
*/
#define XUL_ELEMENT_FLAG_BIT(n_) \
NODE_FLAG_BIT(ELEMENT_TYPE_SPECIFIC_BITS_OFFSET + (n_))
// XUL element specific bits
enum {
XUL_ELEMENT_HAS_CONTENTMENU_LISTENER = XUL_ELEMENT_FLAG_BIT(0),
XUL_ELEMENT_HAS_POPUP_LISTENER = XUL_ELEMENT_FLAG_BIT(1)
};
ASSERT_NODE_FLAGS_SPACE(ELEMENT_TYPE_SPECIFIC_BITS_OFFSET + 2);
#undef XUL_ELEMENT_FLAG_BIT
class nsXULElement : public nsStyledElement {
protected:
typedef mozilla::dom::Document Document;
// Use Construct to construct elements instead of this constructor.
explicit nsXULElement(already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo);
public:
using Element::Blur;
using Element::Focus;
static nsresult CreateFromPrototype(nsXULPrototypeElement* aPrototype,
Document* aDocument, bool aIsScriptable,
bool aIsRoot,
mozilla::dom::Element** aResult);
// This is the constructor for nsXULElements.
static nsXULElement* Construct(
already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo);
NS_IMPL_FROMNODE(nsXULElement, kNameSpaceID_XUL)
// nsISupports
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(nsXULElement, nsStyledElement)
// nsINode
void GetEventTargetParent(mozilla::EventChainPreVisitor& aVisitor) override;
MOZ_CAN_RUN_SCRIPT_BOUNDARY
virtual nsresult PreHandleEvent(
mozilla::EventChainVisitor& aVisitor) override;
// nsIContent
virtual nsresult BindToTree(BindContext&, nsINode& aParent) override;
virtual void UnbindFromTree(bool aNullParent) override;
virtual void DestroyContent() override;
virtual void DoneAddingChildren(bool aHaveNotified) override;
#ifdef DEBUG
virtual void List(FILE* out, int32_t aIndent) const override;
virtual void DumpContent(FILE* out, int32_t aIndent,
bool aDumpAll) const override {}
#endif
MOZ_CAN_RUN_SCRIPT int32_t ScreenX();
MOZ_CAN_RUN_SCRIPT int32_t ScreenY();
MOZ_CAN_RUN_SCRIPT bool HasMenu();
MOZ_CAN_RUN_SCRIPT void OpenMenu(bool aOpenFlag);
virtual bool PerformAccesskey(bool aKeyCausesActivation,
bool aIsTrustedEvent) override;
void ClickWithInputSource(uint16_t aInputSource, bool aIsTrustedEvent);
virtual bool IsNodeOfType(uint32_t aFlags) const override;
virtual bool IsFocusableInternal(int32_t* aTabIndex,
bool aWithMouse) override;
virtual nsChangeHint GetAttributeChangeHint(const nsAtom* aAttribute,
int32_t aModType) const override;
NS_IMETHOD_(bool) IsAttributeMapped(const nsAtom* aAttribute) const override;
virtual nsresult Clone(mozilla::dom::NodeInfo*,
nsINode** aResult) const override;
virtual void RecompileScriptEventListeners() override;
virtual bool IsEventAttributeNameInternal(nsAtom* aName) override;
typedef mozilla::dom::DOMString DOMString;
void GetXULAttr(nsAtom* aName, DOMString& aResult) const {
GetAttr(kNameSpaceID_None, aName, aResult);
}
void SetXULAttr(nsAtom* aName, const nsAString& aValue,
mozilla::ErrorResult& aError) {
SetAttr(aName, aValue, aError);
}
bool GetXULBoolAttr(nsAtom* aName) const {
return AttrValueIs(kNameSpaceID_None, aName, u"true"_ns, eCaseMatters);
}
void SetXULBoolAttr(nsAtom* aName, bool aValue) {
if (aValue) {
SetAttr(kNameSpaceID_None, aName, u"true"_ns, true);
} else {
UnsetAttr(kNameSpaceID_None, aName, true);
}
}
// WebIDL API
void GetFlex(DOMString& aValue) const { GetXULAttr(nsGkAtoms::flex, aValue); }
void SetFlex(const nsAString& aValue, mozilla::ErrorResult& rv) {
SetXULAttr(nsGkAtoms::flex, aValue, rv);
}
bool Hidden() const { return BoolAttrIsTrue(nsGkAtoms::hidden); }
void SetHidden(bool aHidden) { SetXULBoolAttr(nsGkAtoms::hidden, aHidden); }
bool Collapsed() const { return BoolAttrIsTrue(nsGkAtoms::collapsed); }
void SetCollapsed(bool aCollapsed) {
SetXULBoolAttr(nsGkAtoms::collapsed, aCollapsed);
}
void GetObserves(DOMString& aValue) const {
GetXULAttr(nsGkAtoms::observes, aValue);
}
void SetObserves(const nsAString& aValue, mozilla::ErrorResult& rv) {
SetXULAttr(nsGkAtoms::observes, aValue, rv);
}
void GetMenu(DOMString& aValue) const { GetXULAttr(nsGkAtoms::menu, aValue); }
void SetMenu(const nsAString& aValue, mozilla::ErrorResult& rv) {
SetXULAttr(nsGkAtoms::menu, aValue, rv);
}
void GetContextMenu(DOMString& aValue) {
GetXULAttr(nsGkAtoms::contextmenu, aValue);
}
void SetContextMenu(const nsAString& aValue, mozilla::ErrorResult& rv) {
SetXULAttr(nsGkAtoms::contextmenu, aValue, rv);
}
void GetTooltip(DOMString& aValue) const {
GetXULAttr(nsGkAtoms::tooltip, aValue);
}
void SetTooltip(const nsAString& aValue, mozilla::ErrorResult& rv) {
SetXULAttr(nsGkAtoms::tooltip, aValue, rv);
}
void GetWidth(DOMString& aValue) const {
GetXULAttr(nsGkAtoms::width, aValue);
}
void SetWidth(const nsAString& aValue, mozilla::ErrorResult& rv) {
SetXULAttr(nsGkAtoms::width, aValue, rv);
}
void GetHeight(DOMString& aValue) { GetXULAttr(nsGkAtoms::height, aValue); }
void SetHeight(const nsAString& aValue, mozilla::ErrorResult& rv) {
SetXULAttr(nsGkAtoms::height, aValue, rv);
}
void GetMinWidth(DOMString& aValue) const {
GetXULAttr(nsGkAtoms::minwidth, aValue);
}
void SetMinWidth(const nsAString& aValue, mozilla::ErrorResult& rv) {
SetXULAttr(nsGkAtoms::minwidth, aValue, rv);
}
void GetMinHeight(DOMString& aValue) const {
GetXULAttr(nsGkAtoms::minheight, aValue);
}
void SetMinHeight(const nsAString& aValue, mozilla::ErrorResult& rv) {
SetXULAttr(nsGkAtoms::minheight, aValue, rv);
}
void GetMaxWidth(DOMString& aValue) const {
GetXULAttr(nsGkAtoms::maxwidth, aValue);
}
void SetMaxWidth(const nsAString& aValue, mozilla::ErrorResult& rv) {
SetXULAttr(nsGkAtoms::maxwidth, aValue, rv);
}
void GetMaxHeight(DOMString& aValue) const {
GetXULAttr(nsGkAtoms::maxheight, aValue);
}
void SetMaxHeight(const nsAString& aValue, mozilla::ErrorResult& rv) {
SetXULAttr(nsGkAtoms::maxheight, aValue, rv);
}
void GetLeft(DOMString& aValue) const { GetXULAttr(nsGkAtoms::left, aValue); }
void SetLeft(const nsAString& aValue, mozilla::ErrorResult& rv) {
SetXULAttr(nsGkAtoms::left, aValue, rv);
}
void GetTop(DOMString& aValue) const { GetXULAttr(nsGkAtoms::top, aValue); }
void SetTop(const nsAString& aValue, mozilla::ErrorResult& rv) {
SetXULAttr(nsGkAtoms::top, aValue, rv);
}
void GetTooltipText(DOMString& aValue) const {
GetXULAttr(nsGkAtoms::tooltiptext, aValue);
}
void SetTooltipText(const nsAString& aValue, mozilla::ErrorResult& rv) {
SetXULAttr(nsGkAtoms::tooltiptext, aValue, rv);
}
void GetSrc(DOMString& aValue) const { GetXULAttr(nsGkAtoms::src, aValue); }
void SetSrc(const nsAString& aValue, mozilla::ErrorResult& rv) {
SetXULAttr(nsGkAtoms::src, aValue, rv);
}
bool AllowEvents() const { return BoolAttrIsTrue(nsGkAtoms::allowevents); }
void SetAllowEvents(bool aAllowEvents) {
SetXULBoolAttr(nsGkAtoms::allowevents, aAllowEvents);
}
nsIControllers* GetControllers(mozilla::ErrorResult& rv);
void Click(mozilla::dom::CallerType aCallerType);
MOZ_CAN_RUN_SCRIPT_BOUNDARY void DoCommand();
// Style() inherited from nsStyledElement
nsINode* GetScopeChainParent() const override {
// For XUL, the parent is the parent element, if any
Element* parent = GetParentElement();
return parent ? parent : nsStyledElement::GetScopeChainParent();
}
bool IsInteractiveHTMLContent() const override;
void MaybeUpdatePrivateLifetime();
protected:
~nsXULElement();
// This can be removed if EnsureContentsGenerated dies.
friend class nsNSElementTearoff;
// Implementation methods
nsresult EnsureContentsGenerated(void) const;
nsresult AddPopupListener(nsAtom* aName);
/**
* Abandon our prototype linkage, and copy all attributes locally
*/
nsresult MakeHeavyweight(nsXULPrototypeElement* aPrototype);
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* aSubjectPrincipal,
bool aNotify) override;
virtual void UpdateEditableState(bool aNotify) override;
virtual bool ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute,
const nsAString& aValue,
nsIPrincipal* aMaybeScriptedPrincipal,
nsAttrValue& aResult) override;
virtual mozilla::EventListenerManager* GetEventListenerManagerForAttr(
nsAtom* aAttrName, bool* aDefer) override;
/**
* Add a listener for the specified attribute, if appropriate.
*/
void AddListenerForAttributeIfNeeded(const nsAttrName& aName);
void AddListenerForAttributeIfNeeded(nsAtom* aLocalName);
protected:
void AddTooltipSupport();
void RemoveTooltipSupport();
// Internal accessor. This shadows the 'Slots', and returns
// appropriate value.
nsIControllers* Controllers() {
nsExtendedDOMSlots* slots = GetExistingExtendedDOMSlots();
return slots ? slots->mControllers.get() : nullptr;
}
void UnregisterAccessKey(const nsAString& aOldValue);
bool BoolAttrIsTrue(nsAtom* aName) const;
friend nsXULElement* NS_NewBasicXULElement(
already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo);
friend nsresult NS_NewXULElement(mozilla::dom::Element** aResult,
mozilla::dom::NodeInfo* aNodeInfo,
mozilla::dom::FromParser aFromParser,
const nsAString* aIs);
friend void NS_TrustedNewXULElement(mozilla::dom::Element** aResult,
mozilla::dom::NodeInfo* aNodeInfo);
static already_AddRefed<nsXULElement> CreateFromPrototype(
nsXULPrototypeElement* aPrototype, mozilla::dom::NodeInfo* aNodeInfo,
bool aIsScriptable, bool aIsRoot);
virtual JSObject* WrapNode(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) override;
bool IsEventStoppedFromAnonymousScrollbar(mozilla::EventMessage aMessage);
MOZ_CAN_RUN_SCRIPT
nsresult DispatchXULCommand(const mozilla::EventChainVisitor& aVisitor,
nsAutoString& aCommand);
};
#endif // nsXULElement_h__