зеркало из https://github.com/mozilla/gecko-dev.git
589 строки
19 KiB
C++
589 строки
19 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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The base XUL element class and associates.
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*/
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#ifndef nsXULElement_h__
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#define nsXULElement_h__
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#include <stdint.h>
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#include <stdio.h>
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#include "ErrorList.h"
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#include "js/RootingAPI.h"
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#include "js/SourceText.h"
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#include "js/TracingAPI.h"
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#include "mozilla/AlreadyAddRefed.h"
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#include "mozilla/Assertions.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/BasicEvents.h"
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#include "mozilla/RefPtr.h"
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#include "mozilla/dom/DOMString.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/dom/FragmentOrElement.h"
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#include "mozilla/dom/FromParser.h"
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#include "mozilla/dom/NameSpaceConstants.h"
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#include "mozilla/dom/NodeInfo.h"
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#include "nsAtom.h"
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#include "nsAttrName.h"
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#include "nsAttrValue.h"
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#include "nsCOMPtr.h"
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#include "nsCaseTreatment.h"
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#include "nsChangeHint.h"
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#include "nsCycleCollectionParticipant.h"
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#include "nsGkAtoms.h"
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#include "nsIContent.h"
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#include "nsINode.h"
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#include "nsISupports.h"
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#include "nsLiteralString.h"
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#include "nsString.h"
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#include "nsStyledElement.h"
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#include "nsTArray.h"
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#include "nsTLiteralString.h"
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#include "nscore.h"
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class JSObject;
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class JSScript;
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class nsAttrValueOrString;
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class nsIControllers;
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class nsIObjectInputStream;
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class nsIObjectOutputStream;
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class nsIOffThreadScriptReceiver;
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class nsIPrincipal;
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class nsIURI;
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class nsXULPrototypeDocument;
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class nsXULPrototypeNode;
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struct JSContext;
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using nsPrototypeArray = nsTArray<RefPtr<nsXULPrototypeNode>>;
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namespace JS {
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class CompileOptions;
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}
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namespace mozilla {
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class ErrorResult;
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class EventChainPreVisitor;
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class EventListenerManager;
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namespace css {
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class StyleRule;
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} // namespace css
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namespace dom {
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class Document;
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class HTMLIFrameElement;
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class PrototypeDocumentContentSink;
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enum class CallerType : uint32_t;
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} // namespace dom
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} // namespace mozilla
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////////////////////////////////////////////////////////////////////////
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#ifdef XUL_PROTOTYPE_ATTRIBUTE_METERING
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# define XUL_PROTOTYPE_ATTRIBUTE_METER(counter) \
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(nsXULPrototypeAttribute::counter++)
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#else
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# define XUL_PROTOTYPE_ATTRIBUTE_METER(counter) ((void)0)
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#endif
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/**
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A prototype attribute for an nsXULPrototypeElement.
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*/
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class nsXULPrototypeAttribute {
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public:
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nsXULPrototypeAttribute()
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: mName(nsGkAtoms::id) // XXX this is a hack, but names have to have a
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// value
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{
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XUL_PROTOTYPE_ATTRIBUTE_METER(gNumAttributes);
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MOZ_COUNT_CTOR(nsXULPrototypeAttribute);
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}
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~nsXULPrototypeAttribute();
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nsAttrName mName;
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nsAttrValue mValue;
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#ifdef XUL_PROTOTYPE_ATTRIBUTE_METERING
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static uint32_t gNumElements;
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static uint32_t gNumAttributes;
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static uint32_t gNumCacheTests;
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static uint32_t gNumCacheHits;
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static uint32_t gNumCacheSets;
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static uint32_t gNumCacheFills;
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#endif /* !XUL_PROTOTYPE_ATTRIBUTE_METERING */
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};
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/**
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A prototype content model element that holds the "primordial" values
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that have been parsed from the original XUL document.
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*/
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class nsXULPrototypeNode {
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public:
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enum Type { eType_Element, eType_Script, eType_Text, eType_PI };
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Type mType;
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virtual nsresult Serialize(
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nsIObjectOutputStream* aStream, nsXULPrototypeDocument* aProtoDoc,
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const nsTArray<RefPtr<mozilla::dom::NodeInfo>>* aNodeInfos) = 0;
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virtual nsresult Deserialize(
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nsIObjectInputStream* aStream, nsXULPrototypeDocument* aProtoDoc,
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nsIURI* aDocumentURI,
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const nsTArray<RefPtr<mozilla::dom::NodeInfo>>* aNodeInfos) = 0;
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/**
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* The prototype document must call ReleaseSubtree when it is going
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* away. This makes the parents through the tree stop owning their
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* children, whether or not the parent's reference count is zero.
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* Individual elements may still own individual prototypes, but
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* those prototypes no longer remember their children to allow them
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* to be constructed.
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*/
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virtual void ReleaseSubtree() {}
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NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_NATIVE_CLASS(nsXULPrototypeNode)
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NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(nsXULPrototypeNode)
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protected:
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explicit nsXULPrototypeNode(Type aType) : mType(aType) {}
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virtual ~nsXULPrototypeNode() = default;
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};
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class nsXULPrototypeElement : public nsXULPrototypeNode {
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public:
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explicit nsXULPrototypeElement(mozilla::dom::NodeInfo* aNodeInfo = nullptr)
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: nsXULPrototypeNode(eType_Element),
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mNodeInfo(aNodeInfo),
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mHasIdAttribute(false),
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mHasClassAttribute(false),
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mHasStyleAttribute(false),
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mIsAtom(nullptr) {}
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private:
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virtual ~nsXULPrototypeElement() { Unlink(); }
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public:
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virtual void ReleaseSubtree() override {
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for (int32_t i = mChildren.Length() - 1; i >= 0; i--) {
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if (mChildren[i].get()) mChildren[i]->ReleaseSubtree();
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}
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mChildren.Clear();
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nsXULPrototypeNode::ReleaseSubtree();
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}
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virtual nsresult Serialize(
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nsIObjectOutputStream* aStream, nsXULPrototypeDocument* aProtoDoc,
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const nsTArray<RefPtr<mozilla::dom::NodeInfo>>* aNodeInfos) override;
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virtual nsresult Deserialize(
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nsIObjectInputStream* aStream, nsXULPrototypeDocument* aProtoDoc,
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nsIURI* aDocumentURI,
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const nsTArray<RefPtr<mozilla::dom::NodeInfo>>* aNodeInfos) override;
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nsresult SetAttrAt(uint32_t aPos, const nsAString& aValue,
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nsIURI* aDocumentURI);
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void Unlink();
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// Trace all scripts held by this element and its children.
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void TraceAllScripts(JSTracer* aTrc);
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nsPrototypeArray mChildren;
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RefPtr<mozilla::dom::NodeInfo> mNodeInfo;
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uint32_t mHasIdAttribute : 1;
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uint32_t mHasClassAttribute : 1;
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uint32_t mHasStyleAttribute : 1;
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nsTArray<nsXULPrototypeAttribute> mAttributes; // [OWNER]
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RefPtr<nsAtom> mIsAtom;
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};
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class nsXULPrototypeScript : public nsXULPrototypeNode {
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public:
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explicit nsXULPrototypeScript(uint32_t aLineNo);
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private:
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virtual ~nsXULPrototypeScript();
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void FillCompileOptions(JS::CompileOptions& options);
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public:
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virtual nsresult Serialize(
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nsIObjectOutputStream* aStream, nsXULPrototypeDocument* aProtoDoc,
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const nsTArray<RefPtr<mozilla::dom::NodeInfo>>* aNodeInfos) override;
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nsresult SerializeOutOfLine(nsIObjectOutputStream* aStream,
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nsXULPrototypeDocument* aProtoDoc);
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virtual nsresult Deserialize(
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nsIObjectInputStream* aStream, nsXULPrototypeDocument* aProtoDoc,
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nsIURI* aDocumentURI,
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const nsTArray<RefPtr<mozilla::dom::NodeInfo>>* aNodeInfos) override;
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nsresult DeserializeOutOfLine(nsIObjectInputStream* aInput,
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nsXULPrototypeDocument* aProtoDoc);
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nsresult Compile(const char16_t* aText, size_t aTextLength,
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JS::SourceOwnership aOwnership, nsIURI* aURI,
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uint32_t aLineNo, mozilla::dom::Document* aDocument,
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nsIOffThreadScriptReceiver* aOffThreadReceiver = nullptr);
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void UnlinkJSObjects();
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void Set(JSScript* aObject);
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bool HasScriptObject() {
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// Conversion to bool doesn't trigger mScriptObject's read barrier.
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return mScriptObject;
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}
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JSScript* GetScriptObject() { return mScriptObject; }
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void TraceScriptObject(JSTracer* aTrc) {
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JS::TraceEdge(aTrc, &mScriptObject, "active window XUL prototype script");
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}
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void Trace(const TraceCallbacks& aCallbacks, void* aClosure) {
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if (mScriptObject) {
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aCallbacks.Trace(&mScriptObject, "mScriptObject", aClosure);
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}
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}
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nsCOMPtr<nsIURI> mSrcURI;
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uint32_t mLineNo;
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bool mSrcLoading;
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bool mOutOfLine;
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mozilla::dom::PrototypeDocumentContentSink*
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mSrcLoadWaiters; // [OWNER] but not COMPtr
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private:
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JS::Heap<JSScript*> mScriptObject;
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};
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class nsXULPrototypeText : public nsXULPrototypeNode {
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public:
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nsXULPrototypeText() : nsXULPrototypeNode(eType_Text) {}
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private:
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virtual ~nsXULPrototypeText() = default;
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public:
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virtual nsresult Serialize(
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nsIObjectOutputStream* aStream, nsXULPrototypeDocument* aProtoDoc,
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const nsTArray<RefPtr<mozilla::dom::NodeInfo>>* aNodeInfos) override;
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virtual nsresult Deserialize(
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nsIObjectInputStream* aStream, nsXULPrototypeDocument* aProtoDoc,
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nsIURI* aDocumentURI,
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const nsTArray<RefPtr<mozilla::dom::NodeInfo>>* aNodeInfos) override;
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nsString mValue;
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};
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class nsXULPrototypePI : public nsXULPrototypeNode {
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public:
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nsXULPrototypePI() : nsXULPrototypeNode(eType_PI) {}
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private:
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virtual ~nsXULPrototypePI() = default;
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public:
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virtual nsresult Serialize(
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nsIObjectOutputStream* aStream, nsXULPrototypeDocument* aProtoDoc,
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const nsTArray<RefPtr<mozilla::dom::NodeInfo>>* aNodeInfos) override;
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virtual nsresult Deserialize(
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nsIObjectInputStream* aStream, nsXULPrototypeDocument* aProtoDoc,
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nsIURI* aDocumentURI,
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const nsTArray<RefPtr<mozilla::dom::NodeInfo>>* aNodeInfos) override;
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nsString mTarget;
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nsString mData;
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};
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////////////////////////////////////////////////////////////////////////
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/**
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The XUL element.
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*/
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#define XUL_ELEMENT_FLAG_BIT(n_) \
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NODE_FLAG_BIT(ELEMENT_TYPE_SPECIFIC_BITS_OFFSET + (n_))
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// XUL element specific bits
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enum {
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XUL_ELEMENT_HAS_CONTENTMENU_LISTENER = XUL_ELEMENT_FLAG_BIT(0),
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XUL_ELEMENT_HAS_POPUP_LISTENER = XUL_ELEMENT_FLAG_BIT(1)
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};
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ASSERT_NODE_FLAGS_SPACE(ELEMENT_TYPE_SPECIFIC_BITS_OFFSET + 2);
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#undef XUL_ELEMENT_FLAG_BIT
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class nsXULElement : public nsStyledElement {
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protected:
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using Document = mozilla::dom::Document;
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// Use Construct to construct elements instead of this constructor.
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explicit nsXULElement(already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo);
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public:
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using Element::Blur;
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using Element::Focus;
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static nsresult CreateFromPrototype(nsXULPrototypeElement* aPrototype,
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Document* aDocument, bool aIsScriptable,
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bool aIsRoot,
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mozilla::dom::Element** aResult);
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// This is the constructor for nsXULElements.
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static nsXULElement* Construct(
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already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo);
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NS_IMPL_FROMNODE(nsXULElement, kNameSpaceID_XUL)
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// nsISupports
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(nsXULElement, nsStyledElement)
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// nsINode
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void GetEventTargetParent(mozilla::EventChainPreVisitor& aVisitor) override;
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MOZ_CAN_RUN_SCRIPT_BOUNDARY
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virtual nsresult PreHandleEvent(
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mozilla::EventChainVisitor& aVisitor) override;
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// nsIContent
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virtual nsresult BindToTree(BindContext&, nsINode& aParent) override;
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virtual void UnbindFromTree(bool aNullParent) override;
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virtual void DestroyContent() override;
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virtual void DoneAddingChildren(bool aHaveNotified) override;
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#ifdef MOZ_DOM_LIST
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virtual void List(FILE* out, int32_t aIndent) const override;
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virtual void DumpContent(FILE* out, int32_t aIndent,
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bool aDumpAll) const override {}
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#endif
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MOZ_CAN_RUN_SCRIPT int32_t ScreenX();
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MOZ_CAN_RUN_SCRIPT int32_t ScreenY();
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MOZ_CAN_RUN_SCRIPT bool HasMenu();
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MOZ_CAN_RUN_SCRIPT void OpenMenu(bool aOpenFlag);
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MOZ_CAN_RUN_SCRIPT
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virtual mozilla::Result<bool, nsresult> PerformAccesskey(
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bool aKeyCausesActivation, bool aIsTrustedEvent) override;
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void ClickWithInputSource(uint16_t aInputSource, bool aIsTrustedEvent);
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virtual bool IsNodeOfType(uint32_t aFlags) const override;
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virtual bool IsFocusableInternal(int32_t* aTabIndex,
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bool aWithMouse) override;
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virtual nsChangeHint GetAttributeChangeHint(const nsAtom* aAttribute,
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int32_t aModType) const override;
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NS_IMETHOD_(bool) IsAttributeMapped(const nsAtom* aAttribute) const override;
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virtual nsresult Clone(mozilla::dom::NodeInfo*,
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nsINode** aResult) const override;
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virtual void RecompileScriptEventListeners() override;
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virtual bool IsEventAttributeNameInternal(nsAtom* aName) override;
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using DOMString = mozilla::dom::DOMString;
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void GetXULAttr(nsAtom* aName, DOMString& aResult) const {
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GetAttr(kNameSpaceID_None, aName, aResult);
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}
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void SetXULAttr(nsAtom* aName, const nsAString& aValue,
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mozilla::ErrorResult& aError) {
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SetAttr(aName, aValue, aError);
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}
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bool GetXULBoolAttr(nsAtom* aName) const {
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return AttrValueIs(kNameSpaceID_None, aName, u"true"_ns, eCaseMatters);
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}
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void SetXULBoolAttr(nsAtom* aName, bool aValue) {
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if (aValue) {
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SetAttr(kNameSpaceID_None, aName, u"true"_ns, true);
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} else {
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UnsetAttr(kNameSpaceID_None, aName, true);
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}
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}
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// WebIDL API
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void GetFlex(DOMString& aValue) const { GetXULAttr(nsGkAtoms::flex, aValue); }
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void SetFlex(const nsAString& aValue, mozilla::ErrorResult& rv) {
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SetXULAttr(nsGkAtoms::flex, aValue, rv);
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}
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bool Hidden() const { return BoolAttrIsTrue(nsGkAtoms::hidden); }
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void SetHidden(bool aHidden) { SetXULBoolAttr(nsGkAtoms::hidden, aHidden); }
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bool Collapsed() const { return BoolAttrIsTrue(nsGkAtoms::collapsed); }
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void SetCollapsed(bool aCollapsed) {
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SetXULBoolAttr(nsGkAtoms::collapsed, aCollapsed);
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}
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void GetObserves(DOMString& aValue) const {
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GetXULAttr(nsGkAtoms::observes, aValue);
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}
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void SetObserves(const nsAString& aValue, mozilla::ErrorResult& rv) {
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SetXULAttr(nsGkAtoms::observes, aValue, rv);
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}
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void GetMenu(DOMString& aValue) const { GetXULAttr(nsGkAtoms::menu, aValue); }
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void SetMenu(const nsAString& aValue, mozilla::ErrorResult& rv) {
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SetXULAttr(nsGkAtoms::menu, aValue, rv);
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}
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void GetContextMenu(DOMString& aValue) {
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GetXULAttr(nsGkAtoms::contextmenu, aValue);
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}
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void SetContextMenu(const nsAString& aValue, mozilla::ErrorResult& rv) {
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SetXULAttr(nsGkAtoms::contextmenu, aValue, rv);
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}
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void GetTooltip(DOMString& aValue) const {
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GetXULAttr(nsGkAtoms::tooltip, aValue);
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}
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void SetTooltip(const nsAString& aValue, mozilla::ErrorResult& rv) {
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SetXULAttr(nsGkAtoms::tooltip, aValue, rv);
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}
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void GetWidth(DOMString& aValue) const {
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GetXULAttr(nsGkAtoms::width, aValue);
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}
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void SetWidth(const nsAString& aValue, mozilla::ErrorResult& rv) {
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SetXULAttr(nsGkAtoms::width, aValue, rv);
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}
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void GetHeight(DOMString& aValue) { GetXULAttr(nsGkAtoms::height, aValue); }
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void SetHeight(const nsAString& aValue, mozilla::ErrorResult& rv) {
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SetXULAttr(nsGkAtoms::height, aValue, rv);
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}
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void GetMinWidth(DOMString& aValue) const {
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GetXULAttr(nsGkAtoms::minwidth, aValue);
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}
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void SetMinWidth(const nsAString& aValue, mozilla::ErrorResult& rv) {
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SetXULAttr(nsGkAtoms::minwidth, aValue, rv);
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}
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void GetMinHeight(DOMString& aValue) const {
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GetXULAttr(nsGkAtoms::minheight, aValue);
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}
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void SetMinHeight(const nsAString& aValue, mozilla::ErrorResult& rv) {
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SetXULAttr(nsGkAtoms::minheight, aValue, rv);
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}
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void GetMaxWidth(DOMString& aValue) const {
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GetXULAttr(nsGkAtoms::maxwidth, aValue);
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}
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void SetMaxWidth(const nsAString& aValue, mozilla::ErrorResult& rv) {
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SetXULAttr(nsGkAtoms::maxwidth, aValue, rv);
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}
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void GetMaxHeight(DOMString& aValue) const {
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GetXULAttr(nsGkAtoms::maxheight, aValue);
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}
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void SetMaxHeight(const nsAString& aValue, mozilla::ErrorResult& rv) {
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SetXULAttr(nsGkAtoms::maxheight, aValue, rv);
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}
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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);
|
|
}
|
|
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;
|
|
|
|
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;
|
|
}
|
|
|
|
bool SupportsAccessKey() const;
|
|
void RegUnRegAccessKey(bool aDoReg) override;
|
|
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__
|