Index: third_party/WebKit/Source/core/paint/BoxPaintInvalidator.h |
diff --git a/third_party/WebKit/Source/core/paint/BoxPaintInvalidator.h b/third_party/WebKit/Source/core/paint/BoxPaintInvalidator.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..8ab4a212c35b0a2f427538b59fd54a1c8883d992 |
--- /dev/null |
+++ b/third_party/WebKit/Source/core/paint/BoxPaintInvalidator.h |
@@ -0,0 +1,44 @@ |
+// 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. |
+ |
+#ifndef BoxPaintInvalidator_h |
+#define BoxPaintInvalidator_h |
+ |
+#include "platform/graphics/PaintInvalidationReason.h" |
+#include "wtf/Allocator.h" |
+ |
+namespace blink { |
+ |
+class LayoutBox; |
+class LayoutRect; |
+class LayoutSize; |
+struct PaintInvalidatorContext; |
+ |
+class BoxPaintInvalidator { |
+ STACK_ALLOCATED(); |
+public: |
+ BoxPaintInvalidator(const LayoutBox& box, const PaintInvalidatorContext& context) |
+ : m_box(box), m_context(context) { } |
+ |
+ static void boxWillBeDestroyed(const LayoutBox&); |
+ |
+ PaintInvalidationReason invalidatePaintIfNeeded(); |
+ |
+private: |
+ PaintInvalidationReason computePaintInvalidationReason(); |
+ |
+ void incrementallyInvalidatePaint(); |
+ void invalidatePaintRectClippedByOldAndNewBounds(const LayoutRect&); |
+ |
+ bool needsToSavePreviousBoxSizes(); |
+ void savePreviousBoxSizesIfNeeded(); |
+ LayoutSize computePreviousBorderBoxSize(const LayoutSize& previousBoundsSize); |
+ |
+ const LayoutBox& m_box; |
+ const PaintInvalidatorContext& m_context; |
+}; |
+ |
+} // namespace blink |
+ |
+#endif |