[LayoutNG] NGInlineLayoutAlgorithm and NGTextLayoutAlgorithm

third_party/WebKit/Source/core/layout/ng/ng_text_layout_algorithm.cc

Index: third_party/WebKit/Source/core/layout/ng/ng_text_layout_algorithm.cc
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_text_layout_algorithm.cc b/third_party/WebKit/Source/core/layout/ng/ng_text_layout_algorithm.cc
index f72caecb8cf527f60a4c59fa3722d0250fc3147e..291c18eebcdd5cbce5eec3fdd5b7ac3a4cdf0089 100644
--- a/third_party/WebKit/Source/core/layout/ng/ng_text_layout_algorithm.cc
+++ b/third_party/WebKit/Source/core/layout/ng/ng_text_layout_algorithm.cc
@@ -6,6 +6,8 @@
 
 #include "core/layout/ng/ng_break_token.h"
 #include "core/layout/ng/ng_constraint_space.h"
+#include "core/layout/ng/ng_fragment.h"
+#include "core/layout/ng/ng_fragment_builder.h"
 #include "core/layout/ng/ng_inline_node.h"
 
 namespace blink {
@@ -25,8 +27,23 @@ NGLayoutStatus NGTextLayoutAlgorithm::Layout(
     NGPhysicalFragmentBase*,
     NGPhysicalFragmentBase** fragment_out,
     NGLayoutAlgorithm**) {
-  // TODO(layout-dev): implement.
-  *fragment_out = nullptr;
+  // TODO(kojii): What kind of fragment tree do we want for line boxes/root line
+  // boxes? Just text, box, or new type of fragment?
+  NGFragmentBuilder root_line_box_builder(NGPhysicalFragmentBase::kFragmentBox);
+  root_line_box_builder.SetWritingMode(constraint_space_->WritingMode());
+  root_line_box_builder.SetDirection(constraint_space_->Direction());
+  unsigned start = 0;
+  do {
+    NGFragmentBuilder line_box_builder(NGPhysicalFragmentBase::kFragmentBox);
+    start =
+        inline_box_->CreateLine(start, constraint_space_, &line_box_builder);
+    root_line_box_builder.AddChild(
+        new NGFragment(constraint_space_->WritingMode(),
+                       constraint_space_->Direction(),
+                       line_box_builder.ToFragment()),
+        NGLogicalOffset());
+  } while (start);
+  *fragment_out = root_line_box_builder.ToFragment();
   return kNewFragment;
 }