forked from mirrors/gecko-dev
318 lines
8.9 KiB
C++
318 lines
8.9 KiB
C++
/* -*- 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 "nsTextFragment.h"
|
|
#include "nsError.h"
|
|
#include "mozilla/dom/Element.h"
|
|
#include "nsCycleCollectionParticipant.h"
|
|
|
|
#include "nsISMILAttr.h"
|
|
#include "mozilla/dom/ShadowRoot.h"
|
|
|
|
class nsIDocument;
|
|
|
|
namespace mozilla {
|
|
namespace dom {
|
|
class HTMLSlotElement;
|
|
} // namespace dom
|
|
} // namespace mozilla
|
|
|
|
#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),
|
|
};
|
|
|
|
// Make sure we have enough space for those bits
|
|
ASSERT_NODE_FLAGS_SPACE(NODE_TYPE_SPECIFIC_BITS_OFFSET + 7);
|
|
|
|
#undef CHARACTER_DATA_FLAG_BIT
|
|
|
|
namespace mozilla {
|
|
namespace 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);
|
|
explicit CharacterData(already_AddRefed<dom::NodeInfo>&& aNodeInfo);
|
|
|
|
void MarkAsMaybeModifiedFrequently()
|
|
{
|
|
SetFlags(NS_MAYBE_MODIFIED_FREQUENTLY);
|
|
}
|
|
|
|
NS_IMPL_FROMNODE_HELPER(CharacterData, IsCharacterData())
|
|
|
|
virtual void GetNodeValueInternal(nsAString& aNodeValue) override;
|
|
virtual void SetNodeValueInternal(const nsAString& aNodeValue,
|
|
ErrorResult& aError) override;
|
|
|
|
// nsINode methods
|
|
uint32_t GetChildCount() const final
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
nsIContent* GetChildAt_Deprecated(uint32_t aIndex) const final
|
|
{
|
|
return nullptr;
|
|
}
|
|
|
|
int32_t ComputeIndexOf(const nsINode* aPossibleChild) const final
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
nsresult InsertChildBefore(nsIContent* aKid,
|
|
nsIContent* aBeforeThis,
|
|
bool aNotify) final
|
|
{
|
|
return NS_OK;
|
|
}
|
|
|
|
void RemoveChildNode(nsIContent* aKid, bool aNotify) final
|
|
{
|
|
}
|
|
|
|
void GetTextContentInternal(nsAString& aTextContent, OOMReporter&) final
|
|
{
|
|
GetNodeValue(aTextContent);
|
|
}
|
|
|
|
void SetTextContentInternal(const nsAString& aTextContent,
|
|
nsIPrincipal* aSubjectPrincipal,
|
|
ErrorResult& aError) final
|
|
{
|
|
// Batch possible DOMSubtreeModified events.
|
|
mozAutoSubtreeModified subtree(OwnerDoc(), nullptr);
|
|
return SetNodeValue(aTextContent, aError);
|
|
}
|
|
|
|
// Implementation for nsIContent
|
|
nsresult BindToTree(nsIDocument* aDocument,
|
|
nsIContent* aParent,
|
|
nsIContent* aBindingParent,
|
|
bool aCompileEventHandlers) override;
|
|
|
|
void UnbindFromTree(bool aDeep = true, bool aNullParent = true) override;
|
|
|
|
already_AddRefed<nsINodeList> GetChildren(uint32_t aFilter) final
|
|
{
|
|
return nullptr;
|
|
}
|
|
|
|
const nsTextFragment* GetText() override
|
|
{
|
|
return &mText;
|
|
}
|
|
|
|
const nsTextFragment& TextFragment() const
|
|
{
|
|
return mText;
|
|
}
|
|
|
|
uint32_t TextLength() const final
|
|
{
|
|
return TextDataLength();
|
|
}
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
MOZ_MUST_USE
|
|
bool AppendTextTo(nsAString& aResult, const fallible_t& aFallible) const
|
|
{
|
|
return mText.AppendTo(aResult, aFallible);
|
|
}
|
|
|
|
void SaveSubtreeState() final
|
|
{
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
void List(FILE* out, int32_t aIndent) const override
|
|
{
|
|
}
|
|
|
|
void DumpContent(FILE* out, int32_t aIndent, bool aDumpAll) const override
|
|
{
|
|
}
|
|
#endif
|
|
|
|
nsXBLBinding* DoGetXBLBinding() const final
|
|
{
|
|
return nullptr;
|
|
}
|
|
|
|
bool IsNodeOfType(uint32_t aFlags) const override
|
|
{
|
|
return false;
|
|
}
|
|
|
|
bool IsLink(nsIURI** aURI) const final
|
|
{
|
|
*aURI = nullptr;
|
|
return false;
|
|
}
|
|
|
|
nsresult Clone(dom::NodeInfo* aNodeInfo,
|
|
nsINode** aResult,
|
|
bool aPreallocateChildren) 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);
|
|
|
|
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_INHERITED(CharacterData,
|
|
nsIContent)
|
|
|
|
protected:
|
|
virtual ~CharacterData();
|
|
|
|
Element* GetNameSpaceElement() final
|
|
{
|
|
return Element::FromNodeOrNull(GetParentNode());
|
|
}
|
|
|
|
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 dom
|
|
} // namespace mozilla
|
|
|
|
#endif /* mozilla_dom_CharacterData_h */
|