[LayoutNG] Refactor NGLineBreaker for ShapingLineBreaker

third_party/WebKit/Source/core/layout/ng/inline/ng_inline_item_result.h

+// 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.
+
+#ifndef NGInlineItemResult_h
+#define NGInlineItemResult_h
+
+#include "core/layout/ng/ng_layout_result.h"
+#include "platform/LayoutUnit.h"
+#include "platform/fonts/shaping/ShapeResult.h"
+#include "platform/wtf/Allocator.h"
+
+namespace blink {
+
+// The result of measuring NGInlineItem.
+//
+// This is a transient context object only while building line boxes.
+// Produced while determining the line break points, but these data are needed
+// to create line boxes.
+//
+// NGLineBreaker produces, and NGInlineLayoutAlgorithm consumes.
+struct CORE_EXPORT NGInlineItemResult {
+  DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();
+
+ public:
+  // The index of NGInlineItem and its text range.
+  unsigned item_index;
+  unsigned start_offset;
+  unsigned end_offset;
+
+  // Inline size of this item.
+  LayoutUnit inline_size;
+
+  // ShapeResult for text items. Maybe different from NGInlineItem if re-shape
+  // is needed in the line breaker.
+  RefPtr<ShapeResult> shape_result;
+
+  // NGLayoutResult for atomic inline items.
+  RefPtr<NGLayoutResult> layout_result;
+
+  NGInlineItemResult();
+  NGInlineItemResult(unsigned index, unsigned start, unsigned end);
+};
+
+// Represents a set of NGInlineItemResult that form a line box.
+using NGInlineItemResults = Vector<NGInlineItemResult, 32>;
+
+}  // namespace blink
+
+#endif  // NGInlineItemResult_h