Check if fragment's block size fits into a layout opportunity.

third_party/WebKit/Source/core/layout/ng/ng_layout_opportunity_iterator.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_layout_opportunity_iterator.h"
 #include "core/layout/ng/ng_constraint_space.h"
 #include "core/layout/ng/ng_exclusion.h"
 #include "platform/wtf/NonCopyingSort.h"
 #include "platform/wtf/text/StringBuilder.h"
 
@@ skipping 253 matching lines @@
     const NGLogicalSize& available_size,
     const NGLogicalOffset& origin_point,
     const NGBoxStrut& margins,
     const NGFragment& fragment) {
   NGLayoutOpportunityIterator opportunity_iter(exclusions, available_size,
                                                origin_point);
   NGLayoutOpportunity opportunity;
   NGLayoutOpportunity opportunity_candidate = opportunity_iter.Next();
   while (!opportunity_candidate.IsEmpty()) {
     opportunity = opportunity_candidate;
-    // Checking opportunity's block size is not necessary as a float cannot be
-    // positioned on top of another float inside of the same constraint space.
     auto fragment_inline_size = fragment.InlineSize() + margins.InlineSum();
-    if (opportunity.size.inline_size >= fragment_inline_size)
+    auto fragment_block_size = fragment.BlockSize() + margins.BlockSum();
+    if (opportunity.size.inline_size >= fragment_inline_size &&
+        opportunity.size.block_size >= fragment_block_size)
       break;
     opportunity_candidate = opportunity_iter.Next();
   }
   return opportunity;
 }
 
 NGLayoutOpportunityIterator::NGLayoutOpportunityIterator(
     const NGExclusions* exclusions,
     const NGLogicalSize& available_size,
     const NGLogicalOffset& offset)
@@ skipping 30 matching lines @@
 #ifndef NDEBUG
 void NGLayoutOpportunityIterator::ShowLayoutOpportunityTree() const {
   StringBuilder string_builder;
   string_builder.Append("\n.:: LayoutOpportunity Tree ::.\n\nRoot Node: ");
   AppendNodeToString(opportunity_tree_root_.get(), &string_builder);
   fprintf(stderr, "%s\n", string_builder.ToString().Utf8().data());
 }
 #endif
 
 }  // namespace blink