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gecko-dev
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gecko-dev/dom/base/nsGenericDOMDataNode.h

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9.5 KiB
C++
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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/. */
/*
* Base class for DOM Core's nsIDOMComment, nsIDOMDocumentType, nsIDOMText,
* CDATASection, and nsIDOMProcessingInstruction nodes.
*/
#ifndef nsGenericDOMDataNode_h___
#define nsGenericDOMDataNode_h___
#include "mozilla/Attributes.h"
#include "nsIContent.h"
#include "nsTextFragment.h"
#include "nsError.h"
#include "mozilla/dom/Element.h"
#include "nsCycleCollectionParticipant.h"
#include "nsISMILAttr.h"
#include "mozilla/dom/ShadowRoot.h"
class nsIDocument;
class nsIDOMText;
namespace mozilla {
namespace dom {
class HTMLSlotElement;
} // namespace dom
} // namespace mozilla
#define DATA_NODE_FLAG_BIT(n_) NODE_FLAG_BIT(NODE_TYPE_SPECIFIC_BITS_OFFSET + (n_))
// Data node specific flags
enum {
// This bit is set to indicate that if the text node changes to
// non-whitespace, we may need to create a frame for it. This bit must
// not be set on nodes that already have a frame.
NS_CREATE_FRAME_IF_NON_WHITESPACE = DATA_NODE_FLAG_BIT(0),
// This bit is set to indicate that if the text node changes to
// whitespace, we may need to reframe it (or its ancestors).
NS_REFRAME_IF_WHITESPACE = DATA_NODE_FLAG_BIT(1),
// This bit is set to indicate that we have a cached
// TextIsOnlyWhitespace value
NS_CACHED_TEXT_IS_ONLY_WHITESPACE = DATA_NODE_FLAG_BIT(2),
// This bit is only meaningful if the NS_CACHED_TEXT_IS_ONLY_WHITESPACE
// bit is set, and if so it indicates whether we're only whitespace or
// not.
NS_TEXT_IS_ONLY_WHITESPACE = DATA_NODE_FLAG_BIT(3),
// This bit is set if there is a NewlineProperty attached to the node
// (used by nsTextFrame).
NS_HAS_NEWLINE_PROPERTY = DATA_NODE_FLAG_BIT(4),
// This bit is set if there is a FlowLengthProperty attached to the node
// (used by nsTextFrame).
NS_HAS_FLOWLENGTH_PROPERTY = DATA_NODE_FLAG_BIT(5),
// This bit is set if the node may be modified frequently. This is typically
// specified if the instance is in <input> or <textarea>.
NS_MAYBE_MODIFIED_FREQUENTLY = DATA_NODE_FLAG_BIT(6),
};
// Make sure we have enough space for those bits
ASSERT_NODE_FLAGS_SPACE(NODE_TYPE_SPECIFIC_BITS_OFFSET + 7);
#undef DATA_NODE_FLAG_BIT
class nsGenericDOMDataNode : public nsIContent
{
public:
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_ADDSIZEOFEXCLUDINGTHIS
explicit nsGenericDOMDataNode(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo);
explicit nsGenericDOMDataNode(already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo);
void MarkAsMaybeModifiedFrequently()
{
SetFlags(NS_MAYBE_MODIFIED_FREQUENTLY);
}
virtual void GetNodeValueInternal(nsAString& aNodeValue) override;
virtual void SetNodeValueInternal(const nsAString& aNodeValue,
mozilla::ErrorResult& aError) override;
// Implementation for nsIDOMCharacterData
nsresult GetData(nsAString& aData) const;
nsresult SetData(const nsAString& aData);
nsresult GetLength(uint32_t* aLength);
nsresult SubstringData(uint32_t aOffset, uint32_t aCount,
nsAString& aReturn);
nsresult AppendData(const nsAString& aArg);
nsresult InsertData(uint32_t aOffset, const nsAString& aArg);
nsresult DeleteData(uint32_t aOffset, uint32_t aCount);
nsresult ReplaceData(uint32_t aOffset, uint32_t aCount,
const nsAString& aArg);
// nsINode methods
virtual uint32_t GetChildCount() const override;
virtual nsIContent *GetChildAt_Deprecated(uint32_t aIndex) const override;
virtual int32_t ComputeIndexOf(const nsINode* aPossibleChild) const override;
virtual nsresult InsertChildBefore(nsIContent* aKid, nsIContent* aBeforeThis,
bool aNotify) override;
virtual nsresult InsertChildAt_Deprecated(nsIContent* aKid, uint32_t aIndex,
bool aNotify) override;
virtual void RemoveChildAt_Deprecated(uint32_t aIndex, bool aNotify) override;
virtual void RemoveChildNode(nsIContent* aKid, bool aNotify) override;
virtual void GetTextContentInternal(nsAString& aTextContent,
mozilla::OOMReporter& aError) override
{
GetNodeValue(aTextContent);
}
virtual void SetTextContentInternal(const nsAString& aTextContent,
nsIPrincipal* aSubjectPrincipal,
mozilla::ErrorResult& aError) override
{
// Batch possible DOMSubtreeModified events.
mozAutoSubtreeModified subtree(OwnerDoc(), nullptr);
return SetNodeValue(aTextContent, aError);
}
// 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 already_AddRefed<nsINodeList> GetChildren(uint32_t aFilter) override;
virtual const nsTextFragment *GetText() override;
virtual uint32_t TextLength() const override;
virtual nsresult SetText(const char16_t* aBuffer, uint32_t aLength,
bool aNotify) override;
// Need to implement this here too to avoid hiding.
nsresult SetText(const nsAString& aStr, bool aNotify)
{
return SetText(aStr.BeginReading(), aStr.Length(), aNotify);
}
virtual nsresult AppendText(const char16_t* aBuffer, uint32_t aLength,
bool aNotify) override;
virtual bool TextIsOnlyWhitespace() override;
bool ThreadSafeTextIsOnlyWhitespace() const final;
virtual bool HasTextForTranslation() override;
virtual void AppendTextTo(nsAString& aResult) override;
MOZ_MUST_USE
virtual bool AppendTextTo(nsAString& aResult,
const mozilla::fallible_t&) override;
virtual void SaveSubtreeState() 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
virtual nsXBLBinding* DoGetXBLBinding() const override;
virtual bool IsNodeOfType(uint32_t aFlags) const override;
virtual bool IsLink(nsIURI** aURI) const override;
virtual nsresult Clone(mozilla::dom::NodeInfo *aNodeInfo, nsINode **aResult,
bool aPreallocateChildren) const override
{
nsCOMPtr<nsINode> result = CloneDataNode(aNodeInfo, true);
result.forget(aResult);
if (!*aResult) {
return NS_ERROR_OUT_OF_MEMORY;
}
return NS_OK;
}
nsresult SplitData(uint32_t aOffset, nsIContent** aReturn,
bool aCloneAfterOriginal = true);
// WebIDL API
// Our XPCOM GetData is just fine for WebIDL
virtual void SetData(const nsAString& aData, mozilla::ErrorResult& rv)
{
rv = SetData(aData);
}
// nsINode::Length() returns the right thing for our length attribute
void SubstringData(uint32_t aStart, uint32_t aCount, nsAString& aReturn,
mozilla::ErrorResult& rv);
void AppendData(const nsAString& aData, mozilla::ErrorResult& rv)
{
rv = AppendData(aData);
}
void InsertData(uint32_t aOffset, const nsAString& aData,
mozilla::ErrorResult& rv)
{
rv = InsertData(aOffset, aData);
}
void DeleteData(uint32_t aOffset, uint32_t aCount, mozilla::ErrorResult& rv)
{
rv = DeleteData(aOffset, aCount);
}
void ReplaceData(uint32_t aOffset, uint32_t aCount, const nsAString& aData,
mozilla::ErrorResult& rv)
{
rv = ReplaceData(aOffset, aCount, aData);
}
uint32_t TextDataLength() const
{
return mText.GetLength();
}
//----------------------------------------
#ifdef DEBUG
void ToCString(nsAString& aBuf, int32_t aOffset, int32_t aLen) const;
#endif
NS_DECL_CYCLE_COLLECTION_SKIPPABLE_SCRIPT_HOLDER_CLASS(nsGenericDOMDataNode)
protected:
virtual ~nsGenericDOMDataNode();
virtual mozilla::dom::Element* GetNameSpaceElement() override
{
nsINode *parent = GetParentNode();
return parent && parent->IsElement() ? parent->AsElement() : nullptr;
}
nsresult SplitText(uint32_t aOffset, nsIDOMText** aReturn);
nsresult GetWholeText(nsAString& aWholeText);
nsresult SetTextInternal(uint32_t aOffset, uint32_t aCount,
const char16_t* aBuffer, uint32_t aLength,
bool aNotify,
CharacterDataChangeInfo::Details* aDetails = nullptr);
/**
* Method to clone this node. This needs to be overriden by all derived
* classes. If aCloneText is true the text content will be cloned too.
*
* @param aOwnerDocument the ownerDocument of the clone
* @param aCloneText if true the text content will be cloned too
* @return the clone
*/
virtual nsGenericDOMDataNode *CloneDataNode(mozilla::dom::NodeInfo *aNodeInfo,
bool aCloneText) const = 0;
nsTextFragment mText;
public:
virtual bool OwnedOnlyByTheDOMTree() override
{
return GetParent() && mRefCnt.get() == 1;
}
virtual bool IsPurple() override
{
return mRefCnt.IsPurple();
}
virtual void RemovePurple() override
{
mRefCnt.RemovePurple();
}
private:
already_AddRefed<nsAtom> GetCurrentValueAtom();
};
#endif /* nsGenericDOMDataNode_h___ */
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