From 5f297c5f57583b0f9d27d714beb285919f42d655 Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <email@mattatobin.com>
Date: Fri, 17 Apr 2020 05:07:41 -0400
Subject: Issue #1375 - Include content rules from
 HTMLTableCellElement::WalkContentStyleRules and move to the mapped attr
 functionality

* Bugs 1341647 and 1341648
---
 dom/base/nsAttrAndChildArray.cpp | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

(limited to 'dom/base/nsAttrAndChildArray.cpp')

diff --git a/dom/base/nsAttrAndChildArray.cpp b/dom/base/nsAttrAndChildArray.cpp
index 9fd27262b..4daac498b 100644
--- a/dom/base/nsAttrAndChildArray.cpp
+++ b/dom/base/nsAttrAndChildArray.cpp
@@ -714,10 +714,19 @@ nsAttrAndChildArray::MappedAttrCount() const
   return mImpl && mImpl->mMappedAttrs ? (uint32_t)mImpl->mMappedAttrs->Count() : 0;
 }
 
+nsresult
+nsAttrAndChildArray::ForceMapped(nsMappedAttributeElement* aContent, nsIDocument* aDocument)
+{
+  nsHTMLStyleSheet* sheet = aDocument->GetAttributeStyleSheet();
+  RefPtr<nsMappedAttributes> mapped = GetModifiableMapped(aContent, sheet, false, 0);
+  return MakeMappedUnique(mapped);
+}
+
 nsMappedAttributes*
 nsAttrAndChildArray::GetModifiableMapped(nsMappedAttributeElement* aContent,
                                          nsHTMLStyleSheet* aSheet,
-                                         bool aWillAddAttr)
+                                         bool aWillAddAttr,
+                                         int32_t aAttrCount)
 {
   if (mImpl && mImpl->mMappedAttrs) {
     return mImpl->mMappedAttrs->Clone(aWillAddAttr);
@@ -727,7 +736,7 @@ nsAttrAndChildArray::GetModifiableMapped(nsMappedAttributeElement* aContent,
 
   nsMapRuleToAttributesFunc mapRuleFunc =
     aContent->GetAttributeMappingFunction();
-  return new nsMappedAttributes(aSheet, mapRuleFunc);
+  return new (aAttrCount) nsMappedAttributes(aSheet, mapRuleFunc);
 }
 
 nsresult
-- 
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