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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
commit36d22d82aa202bb199967e9512281e9a53db42c9 (patch)
tree105e8c98ddea1c1e4784a60a5a6410fa416be2de /dom/base/nsMappedAttributes.h
parentInitial commit. (diff)
downloadfirefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz
firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip
Adding upstream version 115.7.0esr.upstream/115.7.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'dom/base/nsMappedAttributes.h')
-rw-r--r--dom/base/nsMappedAttributes.h115
1 files changed, 115 insertions, 0 deletions
diff --git a/dom/base/nsMappedAttributes.h b/dom/base/nsMappedAttributes.h
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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/. */
+
+/*
+ * A unique per-element set of attributes that is used as an
+ * nsIStyleRule; used to implement presentational attributes.
+ */
+
+#ifndef nsMappedAttributes_h___
+#define nsMappedAttributes_h___
+
+#include "AttrArray.h"
+#include "nsMappedAttributeElement.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/ServoBindingTypes.h"
+#include "mozilla/MemoryReporting.h"
+
+class nsAtom;
+class nsHTMLStyleSheet;
+
+class nsMappedAttributes final {
+ using InternalAttr = AttrArray::InternalAttr;
+
+ public:
+ nsMappedAttributes(nsHTMLStyleSheet* aSheet,
+ nsMapRuleToAttributesFunc aMapRuleFunc);
+
+ // Do not return null.
+ void* operator new(size_t size, uint32_t aAttrCount = 1) noexcept(true);
+ nsMappedAttributes* Clone(bool aWillAddAttr);
+
+ NS_INLINE_DECL_REFCOUNTING_WITH_DESTROY(nsMappedAttributes, LastRelease())
+
+ void SetAndSwapAttr(nsAtom* aAttrName, nsAttrValue& aValue,
+ bool* aValueWasSet);
+ const nsAttrValue* GetAttr(const nsAtom* aAttrName) const;
+ const nsAttrValue* GetAttr(const nsAString& aAttrName) const;
+
+ uint32_t Count() const { return mAttrCount; }
+
+ bool Equals(const nsMappedAttributes* aAttributes) const;
+ PLDHashNumber HashValue() const;
+
+ void DropStyleSheetReference() { mSheet = nullptr; }
+ void SetStyleSheet(nsHTMLStyleSheet* aSheet);
+ nsHTMLStyleSheet* GetStyleSheet() { return mSheet; }
+
+ void SetRuleMapper(nsMapRuleToAttributesFunc aRuleMapper) {
+ mRuleMapper = aRuleMapper;
+ }
+
+ auto Attrs() const {
+ return mozilla::Span<const InternalAttr>{mBuffer, mAttrCount};
+ }
+ auto Attrs() { return mozilla::Span<InternalAttr>{mBuffer, mAttrCount}; }
+ const nsAttrName* NameAt(uint32_t aPos) const {
+ NS_ASSERTION(aPos < mAttrCount, "out-of-bounds");
+ return &Attrs()[aPos].mName;
+ }
+ const nsAttrValue* AttrAt(uint32_t aPos) const {
+ NS_ASSERTION(aPos < mAttrCount, "out-of-bounds");
+ return &Attrs()[aPos].mValue;
+ }
+ // Remove the attr at position aPos. The value of the attr is placed in
+ // aValue; any value that was already in aValue is destroyed.
+ void RemoveAttrAt(uint32_t aPos, nsAttrValue& aValue);
+ const nsAttrName* GetExistingAttrNameFromQName(const nsAString& aName) const;
+ int32_t IndexOfAttr(const nsAtom* aLocalName) const;
+
+ // Apply the contained mapper to the contained set of servo rules,
+ // unless the servo rules have already been initialized.
+ void LazilyResolveServoDeclaration(mozilla::dom::Document* aDocument);
+
+ // Obtain the contained servo declaration block
+ // May return null if called before the inner block
+ // has been (lazily) resolved
+ const mozilla::StyleLockedDeclarationBlock* GetServoStyle() const {
+ return mServoStyle;
+ }
+
+ void ClearServoStyle() {
+ MOZ_ASSERT(NS_IsMainThread());
+ mServoStyle = nullptr;
+ }
+
+ size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
+
+ static void Shutdown();
+
+ private:
+ void LastRelease();
+
+ nsMappedAttributes(const nsMappedAttributes& aCopy);
+ ~nsMappedAttributes();
+
+ uint16_t mAttrCount;
+#ifdef DEBUG
+ uint16_t mBufferSize;
+#endif
+ nsHTMLStyleSheet* mSheet; // weak
+ nsMapRuleToAttributesFunc mRuleMapper;
+ RefPtr<mozilla::StyleLockedDeclarationBlock> mServoStyle;
+ InternalAttr mBuffer[0];
+
+ static bool sShuttingDown;
+
+ // We're caching some memory to avoid trashing the allocator.
+ // The memory stored at index N can hold N attribute values.
+ static nsTArray<void*>* sCachedMappedAttributeAllocations;
+};
+
+#endif /* nsMappedAttributes_h___ */