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-rw-r--r--layout/style/ServoElementSnapshot.cpp87
1 files changed, 87 insertions, 0 deletions
diff --git a/layout/style/ServoElementSnapshot.cpp b/layout/style/ServoElementSnapshot.cpp
new file mode 100644
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+++ b/layout/style/ServoElementSnapshot.cpp
@@ -0,0 +1,87 @@
+/* -*- 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/. */
+
+#include "mozilla/ServoElementSnapshot.h"
+#include "mozilla/GeckoBindings.h"
+#include "mozilla/dom/Element.h"
+#include "nsIContentInlines.h"
+#include "nsContentUtils.h"
+
+namespace mozilla {
+
+ServoElementSnapshot::ServoElementSnapshot(const Element& aElement)
+ : mState(0),
+ mContains(Flags(0)),
+ mIsTableBorderNonzero(false),
+ mIsMozBrowserFrame(false),
+ mIsSelectListBox(false),
+ mClassAttributeChanged(false),
+ mIdAttributeChanged(false) {
+ MOZ_COUNT_CTOR(ServoElementSnapshot);
+ MOZ_ASSERT(NS_IsMainThread());
+ mIsInChromeDocument = nsContentUtils::IsChromeDoc(aElement.OwnerDoc());
+ mSupportsLangAttr = aElement.SupportsLangAttr();
+}
+
+void ServoElementSnapshot::AddOtherPseudoClassState(const Element& aElement) {
+ if (HasOtherPseudoClassState()) {
+ return;
+ }
+
+ mIsTableBorderNonzero = Gecko_IsTableBorderNonzero(&aElement);
+ mIsMozBrowserFrame = Gecko_IsBrowserFrame(&aElement);
+ mIsSelectListBox = Gecko_IsSelectListBox(&aElement);
+
+ mContains |= Flags::OtherPseudoClassState;
+}
+
+void ServoElementSnapshot::AddAttrs(const Element& aElement,
+ int32_t aNameSpaceID, nsAtom* aAttribute) {
+ if (aNameSpaceID == kNameSpaceID_None) {
+ if (aAttribute == nsGkAtoms::_class) {
+ if (mClassAttributeChanged) {
+ return;
+ }
+ mClassAttributeChanged = true;
+ } else if (aAttribute == nsGkAtoms::id) {
+ if (mIdAttributeChanged) {
+ return;
+ }
+ mIdAttributeChanged = true;
+ }
+ }
+
+ if (!mChangedAttrNames.Contains(aAttribute)) {
+ mChangedAttrNames.AppendElement(aAttribute);
+ }
+
+ if (HasAttrs()) {
+ return;
+ }
+
+ uint32_t attrCount = aElement.GetAttrCount();
+ mAttrs.SetCapacity(attrCount);
+ for (uint32_t i = 0; i < attrCount; ++i) {
+ const BorrowedAttrInfo info = aElement.GetAttrInfoAt(i);
+ MOZ_ASSERT(info);
+ mAttrs.AppendElement(AttrArray::InternalAttr{*info.mName, *info.mValue});
+ }
+
+ mContains |= Flags::Attributes;
+ if (aElement.HasID()) {
+ mContains |= Flags::Id;
+ }
+
+ if (const nsAttrValue* classValue = aElement.GetClasses()) {
+ // FIXME(emilio): It's pretty unfortunate that this is only relevant for
+ // SVG, yet it's a somewhat expensive copy. We should be able to do
+ // better!
+ mClass = *classValue;
+ mContains |= Flags::MaybeClass;
+ }
+}
+
+} // namespace mozilla