[LayoutNG] Implement CSS 'text-indent' property

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/geometry/ng_box_strut.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 {
 
+class NGConstraintSpace;
+
 class NGInlineNode;
 
 // 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 {
@@ skipping 50 matching lines @@
 
  public:
   NGLineInfo() {}
   explicit NGLineInfo(size_t capacity) : results_(capacity) {}
 
   // The style to use for the line.
   const ComputedStyle& LineStyle() const {
     DCHECK(line_style_);
     return *line_style_;
   }
-  void SetLineStyle(const NGInlineNode&, bool is_first_line);
+  void SetLineStyle(const NGInlineNode&,
+                    const NGConstraintSpace&,
+                    bool is_first_line,
+                    bool is_after_forced_break);
 
   // Use ::first-line style if true.
   // https://drafts.csswg.org/css-pseudo/#selectordef-first-line
-  bool IsFirstLine() const { return is_first_line_; }
+  // This is false for the "first formatted line" if '::first-line' rule is not
+  // used in the document.
+  // https://www.w3.org/TR/CSS22/selector.html#first-formatted-line
+  bool UseFirstLineStyle() const { return use_first_line_style_; }
 
   // The last line of a block, or the line ends with a forced line break.
   // https://drafts.csswg.org/css-text-3/#propdef-text-align-last
   bool IsLastLine() const { return is_last_line_; }
   void SetIsLastLine(bool is_last_line) { is_last_line_ = is_last_line; }
 
   // NGInlineItemResults for this line.
   NGInlineItemResults& Results() { return results_; }
   const NGInlineItemResults& Results() const { return results_; }
 
+  LayoutUnit TextIndent() const { return text_indent_; }
+
   LayoutUnit LineLeft() const { return line_left_; }
   LayoutUnit AvailableWidth() const { return available_width_; }
   LayoutUnit LineTop() const { return line_top_; }
   void SetLineLocation(LayoutUnit line_left,
                        LayoutUnit available_width,
                        LayoutUnit line_top);
 
  private:
   const ComputedStyle* line_style_ = nullptr;
   NGInlineItemResults results_;
+
   LayoutUnit line_left_;
   LayoutUnit available_width_;
   LayoutUnit line_top_;
-  bool is_first_line_ = false;
+  LayoutUnit text_indent_;
+
+  bool use_first_line_style_ = false;
   bool is_last_line_ = false;
 };
 
 }  // namespace blink
 
 #endif  // NGInlineItemResult_h