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// Copyright 2017 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 "third_party/blink/renderer/core/paint/adjust_paint_offset_scope.h"
#include "third_party/blink/renderer/core/layout/layout_block_flow.h"
#include "third_party/blink/renderer/core/layout/layout_table_section.h"
namespace blink {
bool AdjustPaintOffsetScope::AdjustPaintOffset(const LayoutBox& box) {
DCHECK(RuntimeEnabledFeatures::SlimmingPaintV175Enabled());
if (box.HasSelfPaintingLayer())
return false;
// TODO(wangxianzhu): Expose fragment so that the client doesn't need to
// call FragmentToPaint() again when needed.
const auto* fragment = old_paint_info_.FragmentToPaint(box);
if (!fragment) {
// TODO(wangxianzhu): The client should know the case and bail out of
// painting of itself.
return false;
}
const auto* paint_properties = fragment->PaintProperties();
if (paint_properties && paint_properties->PaintOffsetTranslation()) {
contents_properties_.emplace(
old_paint_info_.context.GetPaintController(),
fragment->LocalBorderBoxProperties(), box,
DisplayItem::PaintPhaseToDrawingType(old_paint_info_.phase));
new_paint_info_.emplace(old_paint_info_);
new_paint_info_->UpdateCullRect(paint_properties->PaintOffsetTranslation()
->Matrix()
.ToAffineTransform());
adjusted_paint_offset_ = fragment->PaintOffset();
return true;
}
if (box.IsFixedPositionObjectInPagedMedia()) {
adjusted_paint_offset_ = fragment->PaintOffset();
return true;
}
if (box.IsTableSection()) {
const auto& section = ToLayoutTableSection(box);
if (section.IsRepeatingHeaderGroup() || section.IsRepeatingFooterGroup()) {
adjusted_paint_offset_ = fragment->PaintOffset();
return true;
}
}
// TODO(wangxianzhu): Use fragment->PaintOffset() for all cases and eliminate
// the paint_offset parameter of paint methods.
return false;
}
bool AdjustPaintOffsetScope::WillUseLegacyLocation(const LayoutBox* child) {
if (child->HasSelfPaintingLayer())
return true;
if (child->IsLayoutNGMixin()) {
NGPaintFragment* paint_fragment = ToLayoutBlockFlow(child)->PaintFragment();
if (!paint_fragment)
return true;
if (!paint_fragment->PhysicalFragment().IsPlacedByLayoutNG())
return true;
return false;
}
return true;
}
} // namespace blink
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