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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 Comment, DocumentType, Text,
* CDATASection, and ProcessingInstruction nodes.
*/
#ifndef mozilla_dom_CharacterData_h
#define mozilla_dom_CharacterData_h
#include "mozilla/Attributes.h"
#include "nsIContent.h"
#include "nsIMutationObserver.h"
#include "nsTextFragment.h"
#include "nsError.h"
#include "nsCycleCollectionParticipant.h"
namespace mozilla::dom {
class Element;
class HTMLSlotElement;
} // namespace mozilla::dom
#define CHARACTER_DATA_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 = CHARACTER_DATA_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 = CHARACTER_DATA_FLAG_BIT(1),
// This bit is set to indicate that we have a cached
// TextIsOnlyWhitespace value
NS_CACHED_TEXT_IS_ONLY_WHITESPACE = CHARACTER_DATA_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 = CHARACTER_DATA_FLAG_BIT(3),
// This bit is set if there is a NewlineProperty attached to the node
// (used by nsTextFrame).
NS_HAS_NEWLINE_PROPERTY = CHARACTER_DATA_FLAG_BIT(4),
// This bit is set if there is a FlowLengthProperty attached to the node
// (used by nsTextFrame).
NS_HAS_FLOWLENGTH_PROPERTY = CHARACTER_DATA_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 = CHARACTER_DATA_FLAG_BIT(6),
// This bit is set if the node may be masked because of being in a password
// field.
NS_MAYBE_MASKED = CHARACTER_DATA_FLAG_BIT(7),
};
// Make sure we have enough space for those bits
ASSERT_NODE_FLAGS_SPACE(NODE_TYPE_SPECIFIC_BITS_OFFSET + 8);
#undef CHARACTER_DATA_FLAG_BIT
namespace mozilla::dom {
class CharacterData : public nsIContent {
public:
// We want to avoid the overhead of extra function calls for
// refcounting when we're not doing refcount logging, so we can't
// NS_DECL_ISUPPORTS_INHERITED.
NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr) override;
NS_INLINE_DECL_REFCOUNTING_INHERITED(CharacterData, nsIContent);
NS_DECL_ADDSIZEOFEXCLUDINGTHIS
explicit CharacterData(already_AddRefed<dom::NodeInfo>&& aNodeInfo);
void MarkAsMaybeModifiedFrequently() {
SetFlags(NS_MAYBE_MODIFIED_FREQUENTLY);
}
void MarkAsMaybeMasked() { SetFlags(NS_MAYBE_MASKED); }
NS_IMPL_FROMNODE_HELPER(CharacterData, IsCharacterData())
virtual void GetNodeValueInternal(nsAString& aNodeValue) override;
virtual void SetNodeValueInternal(const nsAString& aNodeValue,
ErrorResult& aError) override;
void GetTextContentInternal(nsAString& aTextContent, OOMReporter&) final {
GetNodeValue(aTextContent);
}
void SetTextContentInternal(const nsAString& aTextContent,
nsIPrincipal* aSubjectPrincipal,
ErrorResult& aError) final;
// Implementation for nsIContent
nsresult BindToTree(BindContext&, nsINode& aParent) override;
void UnbindFromTree(bool aNullParent = true) override;
already_AddRefed<nsINodeList> GetChildren(uint32_t aFilter) final {
return nullptr;
}
const nsTextFragment* GetText() override { return &mText; }
uint32_t TextLength() const final { return TextDataLength(); }
const nsTextFragment& TextFragment() const { return mText; }
uint32_t TextDataLength() const { return mText.GetLength(); }
/**
* Set the text to the given value. If aNotify is true then
* the document is notified of the content change.
*/
nsresult SetText(const char16_t* aBuffer, uint32_t aLength, bool aNotify);
/**
* Append the given value to the current text. If aNotify is true then
* the document is notified of the content change.
*/
nsresult SetText(const nsAString& aStr, bool aNotify) {
return SetText(aStr.BeginReading(), aStr.Length(), aNotify);
}
/**
* Append the given value to the current text. If aNotify is true then
* the document is notified of the content change.
*/
nsresult AppendText(const char16_t* aBuffer, uint32_t aLength, bool aNotify);
bool TextIsOnlyWhitespace() final;
bool ThreadSafeTextIsOnlyWhitespace() const final;
/**
* Append the text content to aResult.
*/
void AppendTextTo(nsAString& aResult) const { mText.AppendTo(aResult); }
/**
* Append the text content to aResult.
*/
[[nodiscard]] bool AppendTextTo(nsAString& aResult,
const fallible_t& aFallible) const {
return mText.AppendTo(aResult, aFallible);
}
void SaveSubtreeState() final {}
#ifdef MOZ_DOM_LIST
void ToCString(nsAString& aBuf, int32_t aOffset, int32_t aLen) const;
void List(FILE* out, int32_t aIndent) const override {}
void DumpContent(FILE* out, int32_t aIndent, bool aDumpAll) const override {}
#endif
bool IsNodeOfType(uint32_t aFlags) const override { return false; }
nsresult Clone(dom::NodeInfo* aNodeInfo, nsINode** aResult) const override {
RefPtr<CharacterData> result = CloneDataNode(aNodeInfo, true);
result.forget(aResult);
if (!*aResult) {
return NS_ERROR_OUT_OF_MEMORY;
}
return NS_OK;
}
// WebIDL API
void GetData(nsAString& aData) const;
virtual void SetData(const nsAString& aData, ErrorResult& rv);
// nsINode::Length() returns the right thing for our length attribute
void SubstringData(uint32_t aStart, uint32_t aCount, nsAString& aReturn,
ErrorResult& rv);
void AppendData(const nsAString& aData, ErrorResult& rv);
void InsertData(uint32_t aOffset, const nsAString& aData, ErrorResult& rv);
void DeleteData(uint32_t aOffset, uint32_t aCount, ErrorResult& rv);
void ReplaceData(uint32_t aOffset, uint32_t aCount, const nsAString& aData,
ErrorResult& rv);
//----------------------------------------
NS_DECL_CYCLE_COLLECTION_SKIPPABLE_WRAPPERCACHE_CLASS_INHERITED(CharacterData,
nsIContent)
/**
* Compare two CharacterData nodes for text equality.
*/
[[nodiscard]] bool TextEquals(const CharacterData* aOther) const {
return mText.TextEquals(aOther->mText);
}
protected:
virtual ~CharacterData();
Element* GetNameSpaceElement() final;
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 already_AddRefed<CharacterData> CloneDataNode(
dom::NodeInfo* aNodeInfo, bool aCloneText) const = 0;
nsTextFragment mText;
private:
already_AddRefed<nsAtom> GetCurrentValueAtom();
};
} // namespace mozilla::dom
#endif /* mozilla_dom_CharacterData_h */
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