1 files changed, 232 insertions, 0 deletions
diff --git a/dom/base/CharacterData.h b/dom/base/CharacterData.h
new file mode 100644
index 0000000000..4f125953ef
--- /dev/null
+++ b/dom/base/CharacterData.h
@@ -0,0 +1,232 @@
+/* -*- 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 */