[SPv2] Paint invalidation in PreWalkTreeWalk, plumbed on PaintInvalidationState

third_party/WebKit/Source/core/paint/PaintInvalidator.cpp

Index: third_party/WebKit/Source/core/paint/PaintInvalidator.cpp
diff --git a/third_party/WebKit/Source/core/paint/PaintInvalidator.cpp b/third_party/WebKit/Source/core/paint/PaintInvalidator.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..2edd221a78cf73e4479d4c830b7fc0a2887f04d5
--- /dev/null
+++ b/third_party/WebKit/Source/core/paint/PaintInvalidator.cpp
@@ -0,0 +1,40 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "core/paint/PaintInvalidator.h"
+
+#include "core/frame/FrameView.h"
+#include "core/layout/LayoutObject.h"
+
+namespace blink {
+
+void PaintInvalidator::invalidatePaintIfNeeded(FrameView& frameView, const PaintPropertyTreeBuilderContext& treeContext, Optional<PaintInvalidatorContext>& paintInvalidatorContext)
+{
+    paintInvalidatorContext.emplace(*frameView.layoutView(), m_pendingDelayedPaintInvalidations);
+    frameView.invalidatePaintIfNeeded(*paintInvalidatorContext);
+}
+
+void PaintInvalidator::invalidatePaintIfNeeded(const LayoutObject& layoutObject, const PaintPropertyTreeBuilderContext& treeContext, const PaintInvalidatorContext& parentPaintInvalidatorContext, Optional<PaintInvalidatorContext>& paintInvalidatorContext)
+{
+    if (!layoutObject.shouldCheckForPaintInvalidation(parentPaintInvalidatorContext))
+        return;
+
+    paintInvalidatorContext.emplace(parentPaintInvalidatorContext, layoutObject);
+
+    if (layoutObject.mayNeedPaintInvalidationSubtree())
+        paintInvalidatorContext->setForceSubtreeInvalidationCheckingWithinContainer();
+
+    PaintInvalidationReason reason = layoutObject.getMutableForPainting().invalidatePaintIfNeeded(*paintInvalidatorContext);
+    layoutObject.getMutableForPainting().clearPaintInvalidationFlags(*paintInvalidatorContext);
+
+    paintInvalidatorContext->updateForChildren(reason);
+}
+
+void PaintInvalidator::processPendingDelayedPaintInvalidations()
+{
+    for (auto target : m_pendingDelayedPaintInvalidations)
+        target->getMutableForPainting().setShouldDoDelayedFullPaintInvalidation();
+}
+
+} // namespace blink