[layoutng] Add a shrink-to-fit flag to the constraint space

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

 // Copyright 2016 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 "core/layout/ng/ng_constraint_space_builder.h"
 
 namespace blink {
 
 NGConstraintSpaceBuilder::NGConstraintSpaceBuilder(
     const NGConstraintSpace* parent_space)
     : available_size_(parent_space->AvailableSize()),
       percentage_resolution_size_(parent_space->PercentageResolutionSize()),
       writing_mode_(parent_space->WritingMode()),
       parent_writing_mode_(writing_mode_),
       is_fixed_size_inline_(false),
       is_fixed_size_block_(false),
+      is_shrink_to_fit_(false),
       is_inline_direction_triggers_scrollbar_(false),
       is_block_direction_triggers_scrollbar_(false),
       fragmentation_type_(kFragmentNone),
       is_new_fc_(parent_space->IsNewFormattingContext()),
       text_direction_(static_cast<unsigned>(parent_space->Direction())),
       exclusions_(parent_space->Exclusions()) {}
 
 NGConstraintSpaceBuilder::NGConstraintSpaceBuilder(NGWritingMode writing_mode)
     : writing_mode_(writing_mode),
       parent_writing_mode_(writing_mode_),
       is_fixed_size_inline_(false),
       is_fixed_size_block_(false),
+      is_shrink_to_fit_(false),
       is_inline_direction_triggers_scrollbar_(false),
       is_block_direction_triggers_scrollbar_(false),
       fragmentation_type_(kFragmentNone),
       is_new_fc_(false),
       text_direction_(static_cast<unsigned>(TextDirection::Ltr)),
       exclusions_(new NGExclusions()) {}
 
 NGConstraintSpaceBuilder& NGConstraintSpaceBuilder::SetAvailableSize(
     NGLogicalSize available_size) {
   available_size_ = available_size;
@@ skipping 17 matching lines @@
   is_fixed_size_inline_ = is_fixed_size_inline;
   return *this;
 }
 
 NGConstraintSpaceBuilder& NGConstraintSpaceBuilder::SetIsFixedSizeBlock(
     bool is_fixed_size_block) {
   is_fixed_size_block_ = is_fixed_size_block;
   return *this;
 }
 
+NGConstraintSpaceBuilder& NGConstraintSpaceBuilder::SetIsShrinkToFit(
+    bool shrink_to_fit) {
+  is_shrink_to_fit_ = shrink_to_fit;
+  return *this;
+}
+
 NGConstraintSpaceBuilder&
 NGConstraintSpaceBuilder::SetIsInlineDirectionTriggersScrollbar(
     bool is_inline_direction_triggers_scrollbar) {
   is_inline_direction_triggers_scrollbar_ =
       is_inline_direction_triggers_scrollbar;
   return *this;
 }
 
 NGConstraintSpaceBuilder&
 NGConstraintSpaceBuilder::SetIsBlockDirectionTriggersScrollbar(
@@ skipping 31 matching lines @@
   bool is_in_parallel_flow = (parent_writing_mode_ == kHorizontalTopBottom) ==
                              (writing_mode_ == kHorizontalTopBottom);
 
   if (is_in_parallel_flow) {
     return new NGConstraintSpace(
         static_cast<NGWritingMode>(writing_mode_),
         static_cast<TextDirection>(text_direction_),
         {available_size_.inline_size, available_size_.block_size},
         {percentage_resolution_size_.inline_size,
          percentage_resolution_size_.block_size},
-        is_fixed_size_inline_, is_fixed_size_block_,
+        is_fixed_size_inline_, is_fixed_size_block_, is_shrink_to_fit_,
         is_inline_direction_triggers_scrollbar_,
         is_block_direction_triggers_scrollbar_,
         static_cast<NGFragmentationType>(fragmentation_type_), is_new_fc_,
         exclusions);
   }
 
   return new NGConstraintSpace(
       static_cast<NGWritingMode>(writing_mode_),
       static_cast<TextDirection>(text_direction_),
       {available_size_.block_size, available_size_.inline_size},
       {percentage_resolution_size_.block_size,
        percentage_resolution_size_.inline_size},
-      is_fixed_size_block_, is_fixed_size_inline_,
+      is_fixed_size_block_, is_fixed_size_inline_, is_shrink_to_fit_,
       is_block_direction_triggers_scrollbar_,
       is_inline_direction_triggers_scrollbar_,
       static_cast<NGFragmentationType>(fragmentation_type_), is_new_fc_,
       exclusions);
 }
 
 }  // namespace blink