Adding upstream version 115.7.0esr.upstream/115.7.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 181 insertions, 0 deletions

diff --git a/dom/base/nsNodeInfoManager.h b/dom/base/nsNodeInfoManager.h
new file mode 100644
index 0000000000..4e24406752
--- /dev/null
+++ b/dom/base/nsNodeInfoManager.h
@@ -0,0 +1,181 @@
+/* -*- 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/. */
+
+/*
+ * A class for handing out nodeinfos and ensuring sharing of them as needed.
+ */
+
+#ifndef nsNodeInfoManager_h___
+#define nsNodeInfoManager_h___
+
+#include "mozilla/Attributes.h"  // for final
+#include "mozilla/dom/NodeInfo.h"
+#include "mozilla/dom/DOMArena.h"
+#include "mozilla/MruCache.h"
+#include "nsCOMPtr.h"                      // for member
+#include "nsCycleCollectionParticipant.h"  // for NS_DECL_CYCLE_*
+#include "nsTHashMap.h"
+#include "nsStringFwd.h"
+
+class nsAtom;
+class nsIPrincipal;
+class nsWindowSizes;
+template <class T>
+struct already_AddRefed;
+
+namespace mozilla::dom {
+class Document;
+}  // namespace mozilla::dom
+
+class nsNodeInfoManager final {
+ private:
+  ~nsNodeInfoManager();
+
+ public:
+  explicit nsNodeInfoManager(mozilla::dom::Document* aDocument);
+
+  NS_DECL_CYCLE_COLLECTION_SKIPPABLE_NATIVE_CLASS(nsNodeInfoManager)
+
+  NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(nsNodeInfoManager)
+
+  /**
+   * Release the reference to the document, this will be called when
+   * the document is going away.
+   */
+  void DropDocumentReference();
+
+  /**
+   * Methods for creating nodeinfo's from atoms and/or strings.
+   */
+  already_AddRefed<mozilla::dom::NodeInfo> GetNodeInfo(
+      nsAtom* aName, nsAtom* aPrefix, int32_t aNamespaceID, uint16_t aNodeType,
+      nsAtom* aExtraName = nullptr);
+  nsresult GetNodeInfo(const nsAString& aName, nsAtom* aPrefix,
+                       int32_t aNamespaceID, uint16_t aNodeType,
+                       mozilla::dom::NodeInfo** aNodeInfo);
+  nsresult GetNodeInfo(const nsAString& aName, nsAtom* aPrefix,
+                       const nsAString& aNamespaceURI, uint16_t aNodeType,
+                       mozilla::dom::NodeInfo** aNodeInfo);
+
+  /**
+   * Returns the nodeinfo for text nodes. Can return null if OOM.
+   */
+  already_AddRefed<mozilla::dom::NodeInfo> GetTextNodeInfo();
+
+  /**
+   * Returns the nodeinfo for comment nodes. Can return null if OOM.
+   */
+  already_AddRefed<mozilla::dom::NodeInfo> GetCommentNodeInfo();
+
+  /**
+   * Returns the nodeinfo for the document node. Can return null if OOM.
+   */
+  already_AddRefed<mozilla::dom::NodeInfo> GetDocumentNodeInfo();
+
+  /**
+   * Retrieve a pointer to the document that owns this node info
+   * manager.
+   */
+  mozilla::dom::Document* GetDocument() const { return mDocument; }
+
+  /**
+   * Gets the principal of the document this nodeinfo manager belongs to.
+   */
+  nsIPrincipal* DocumentPrincipal() const {
+    NS_ASSERTION(mPrincipal, "How'd that happen?");
+    return mPrincipal;
+  }
+
+  void RemoveNodeInfo(mozilla::dom::NodeInfo* aNodeInfo);
+
+  /**
+   * Returns true if SVG nodes in this document have real SVG semantics.
+   */
+  bool SVGEnabled() {
+    return mSVGEnabled.valueOrFrom([this] { return InternalSVGEnabled(); });
+  }
+
+  /**
+   * Returns true if MathML nodes in this document have real MathML semantics.
+   */
+  bool MathMLEnabled() {
+    return mMathMLEnabled.valueOrFrom(
+        [this] { return InternalMathMLEnabled(); });
+  }
+
+  mozilla::dom::DOMArena* GetArenaAllocator() { return mArena; }
+  void SetArenaAllocator(mozilla::dom::DOMArena* aArena);
+
+  void* Allocate(size_t aSize);
+
+  void Free(void* aPtr) { free(aPtr); }
+
+  bool HasAllocated() { return mHasAllocated; }
+
+  void AddSizeOfIncludingThis(nsWindowSizes& aSizes) const;
+
+ protected:
+  friend class mozilla::dom::Document;
+  friend class nsXULPrototypeDocument;
+
+  /**
+   * Sets the principal of the document this nodeinfo manager belongs to.
+   */
+  void SetDocumentPrincipal(nsIPrincipal* aPrincipal);
+
+ private:
+  bool InternalSVGEnabled();
+  bool InternalMathMLEnabled();
+
+  class NodeInfoInnerKey
+      : public nsPtrHashKey<mozilla::dom::NodeInfo::NodeInfoInner> {
+   public:
+    explicit NodeInfoInnerKey(KeyTypePointer aKey) : nsPtrHashKey(aKey) {}
+    NodeInfoInnerKey(NodeInfoInnerKey&&) = default;
+    ~NodeInfoInnerKey() = default;
+    bool KeyEquals(KeyTypePointer aKey) const { return *mKey == *aKey; }
+    static PLDHashNumber HashKey(KeyTypePointer aKey) { return aKey->Hash(); }
+  };
+
+  struct NodeInfoCache
+      : public mozilla::MruCache<mozilla::dom::NodeInfo::NodeInfoInner,
+                                 mozilla::dom::NodeInfo*, NodeInfoCache> {
+    static mozilla::HashNumber Hash(
+        const mozilla::dom::NodeInfo::NodeInfoInner& aKey) {
+      return aKey.Hash();
+    }
+    static bool Match(const mozilla::dom::NodeInfo::NodeInfoInner& aKey,
+                      const mozilla::dom::NodeInfo* aVal) {
+      return aKey == aVal->mInner;
+    }
+  };
+
+  nsTHashMap<NodeInfoInnerKey, mozilla::dom::NodeInfo*> mNodeInfoHash;
+  mozilla::dom::Document* MOZ_NON_OWNING_REF mDocument;  // WEAK
+  uint32_t mNonDocumentNodeInfos;
+
+  // Note: it's important that mPrincipal is declared before mDefaultPrincipal,
+  // since the latter is initialized to the value of the former in the
+  // constructor's init list:
+  nsCOMPtr<nsIPrincipal> mPrincipal;         // Never null
+  nsCOMPtr<nsIPrincipal> mDefaultPrincipal;  // Never null
+
+  mozilla::dom::NodeInfo* MOZ_NON_OWNING_REF
+      mTextNodeInfo;  // WEAK to avoid circular ownership
+  mozilla::dom::NodeInfo* MOZ_NON_OWNING_REF
+      mCommentNodeInfo;  // WEAK to avoid circular ownership
+  mozilla::dom::NodeInfo* MOZ_NON_OWNING_REF
+      mDocumentNodeInfo;  // WEAK to avoid circular ownership
+  NodeInfoCache mRecentlyUsedNodeInfos;
+  mozilla::Maybe<bool> mSVGEnabled;     // Lazily initialized.
+  mozilla::Maybe<bool> mMathMLEnabled;  // Lazily initialized.
+
+  // For dom_arena_allocator_enabled
+  RefPtr<mozilla::dom::DOMArena> mArena;
+  bool mHasAllocated = false;
+};
+
+#endif /* nsNodeInfoManager_h___ */