[LayoutNG] Paint inlines from the fragment tree

third_party/WebKit/Source/core/paint/NGTextPainter.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 NGTextPainter_h
+#define NGTextPainter_h
+
+#include "core/CoreExport.h"
+#include "core/paint/TextPainterBase.h"
+
+namespace blink {
+
+class NGPhysicalTextFragment;
+struct TextFragmentPaintInfo;
+
+// Text painter for LayoutNG. Operates on NGPhysicalTextFragments.
+class CORE_EXPORT NGTextPainter : public TextPainterBase {
+  STACK_ALLOCATED();
+
+ public:
+  NGTextPainter(GraphicsContext& context,
+                const Font& font,
+                const NGPhysicalTextFragment* text_fragment,
+                const LayoutPoint& text_origin,
+                const LayoutRect& text_bounds,
+                bool horizontal)
+      : TextPainterBase(context, font, text_origin, text_bounds, horizontal),
+        text_fragment_(text_fragment) {}
+  ~NGTextPainter() {}
+
+  // void SetCombinedText(LayoutTextCombine* combined_text) {
+  //  combined_text_ = combined_text;
+  //}
+
+  void ClipDecorationsStripe(float upper, float stripe_width, float dilation);
+  void Paint(unsigned start_offset,
+             unsigned end_offset,
+             unsigned length,
+             const Style&);
+
+  static Style TextPaintingStyle(const NGPhysicalTextFragment*,
+                                 const ComputedStyle&,
+                                 const PaintInfo&);
+  static Style SelectionPaintingStyle(const NGPhysicalTextFragment*,
+                                      bool have_selection,
+                                      const PaintInfo&,
+                                      const Style& text_style);
+
+ private:
+  template <PaintInternalStep step>
+  void PaintInternalFragment(TextFragmentPaintInfo&,
+                             unsigned from,
+                             unsigned to);
+
+  template <PaintInternalStep step>
+  void PaintInternal(unsigned start_offset,
+                     unsigned end_offset,
+                     unsigned truncation_point);
+
+  void PaintEmphasisMarkForCombinedText();
+
+  const NGPhysicalTextFragment* text_fragment_;
+};
+
+}  // namespace blink
+
+#endif  // TextPainter_h