1 files changed, 65 insertions, 0 deletions
diff --git a/layout/style/nsHTMLCSSStyleSheet.cpp b/layout/style/nsHTMLCSSStyleSheet.cpp
new file mode 100644
index 0000000000..68d596467d
--- /dev/null
+++ b/layout/style/nsHTMLCSSStyleSheet.cpp
@@ -0,0 +1,65 @@
+/* -*- 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/. */
+
+/*
+ * style sheet and style rule processor representing style attributes
+ */
+
+#include "nsHTMLCSSStyleSheet.h"
+#include "mozilla/MemoryReporting.h"
+#include "mozilla/DeclarationBlock.h"
+#include "nsPresContext.h"
+#include "mozilla/dom/Element.h"
+#include "nsAttrValue.h"
+#include "nsAttrValueInlines.h"
+#include "nsCSSPseudoElements.h"
+#include "mozilla/RestyleManager.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+nsHTMLCSSStyleSheet::nsHTMLCSSStyleSheet() = default;
+
+nsHTMLCSSStyleSheet::~nsHTMLCSSStyleSheet() {
+  // We may go away before all of our cached style attributes do,
+  // so clean up any that are left.
+  for (auto iter = mCachedStyleAttrs.Iter(); !iter.Done(); iter.Next()) {
+    MiscContainer*& value = iter.Data();
+
+    // Ideally we'd just call MiscContainer::Evict, but we can't do that since
+    // we're iterating the hashtable.
+    if (value->mType == nsAttrValue::eCSSDeclaration) {
+      DeclarationBlock* declaration = value->mValue.mCSSDeclaration;
+      declaration->SetHTMLCSSStyleSheet(nullptr);
+    } else {
+      MOZ_ASSERT_UNREACHABLE("unexpected cached nsAttrValue type");
+    }
+
+    value->mValue.mCached = 0;
+    iter.Remove();
+  }
+}
+
+void nsHTMLCSSStyleSheet::CacheStyleAttr(const nsAString& aSerialized,
+                                         MiscContainer* aValue) {
+  mCachedStyleAttrs.InsertOrUpdate(aSerialized, aValue);
+}
+
+void nsHTMLCSSStyleSheet::EvictStyleAttr(const nsAString& aSerialized,
+                                         MiscContainer* aValue) {
+#ifdef DEBUG
+  {
+    NS_ASSERTION(aValue == mCachedStyleAttrs.Get(aSerialized),
+                 "Cached value does not match?!");
+  }
+#endif
+  mCachedStyleAttrs.Remove(aSerialized);
+}
+
+MiscContainer* nsHTMLCSSStyleSheet::LookupStyleAttr(
+    const nsAString& aSerialized) {
+  return mCachedStyleAttrs.Get(aSerialized);
+}