Utility routines for ng_units

third_party/WebKit/Source/core/layout/ng/ng_units.h

 // 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.
 
 #ifndef NGUnits_h
 #define NGUnits_h
 
 #include "core/CoreExport.h"
 #include "core/layout/ng/ng_writing_mode.h"
 #include "platform/LayoutUnit.h"
 #include "platform/text/TextDirection.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
 
 class LayoutUnit;
 struct NGPhysicalOffset;
 struct NGPhysicalSize;
+struct NGBoxStrut;
 
 struct MinAndMaxContentSizes {
   LayoutUnit min_content;
   LayoutUnit max_content;
+  LayoutUnit ShrinkToFit(LayoutUnit available_size) const;
 };
 
 struct NGLogicalSize {
   NGLogicalSize() {}
   NGLogicalSize(LayoutUnit inline_size, LayoutUnit block_size)
       : inline_size(inline_size), block_size(block_size) {}
 
   LayoutUnit inline_size;
   LayoutUnit block_size;
 
   NGPhysicalSize ConvertToPhysical(NGWritingMode mode) const;
   bool operator==(const NGLogicalSize& other) const;
 
   bool IsEmpty() const {
     return inline_size == LayoutUnit() || block_size == LayoutUnit();
   }
 };
 
+inline std::ostream& operator<<(std::ostream& stream,
+                                const NGLogicalSize& value) {
+  return stream << value.inline_size << "x" << value.block_size;
+}
+
 // NGLogicalOffset is the position of a rect (typically a fragment) relative to
 // its parent rect in the logical coordinate system.
 struct NGLogicalOffset {
   NGLogicalOffset() {}
   NGLogicalOffset(LayoutUnit inline_offset, LayoutUnit block_offset)
       : inline_offset(inline_offset), block_offset(block_offset) {}
 
   LayoutUnit inline_offset;
   LayoutUnit block_offset;
 
@@ skipping 109 matching lines @@
 struct NGPixelSnappedPhysicalRect {
   int top;
   int left;
   int width;
   int height;
 };
 
 // Struct to store physical dimensions, independent of writing mode and
 // direction.
 // See https://drafts.csswg.org/css-writing-modes-3/#abstract-box
-struct NGPhysicalBoxStrut {
+struct CORE_EXPORT NGPhysicalBoxStrut {
   LayoutUnit left;
   LayoutUnit right;
   LayoutUnit top;
   LayoutUnit bottom;
+  NGBoxStrut ConvertToLogical(NGWritingMode, TextDirection) const;
 };
 
 // This struct is used for storing margins, borders or padding of a box on all
 // four edges.
-struct NGBoxStrut {
+struct CORE_EXPORT NGBoxStrut {
   LayoutUnit inline_start;
   LayoutUnit inline_end;
   LayoutUnit block_start;
   LayoutUnit block_end;
 
   LayoutUnit InlineSum() const { return inline_start + inline_end; }
   LayoutUnit BlockSum() const { return block_start + block_end; }
 
   bool IsEmpty() const;
 
@@ skipping 45 matching lines @@
 
 // Struct to represent a simple edge that has start and end.
 struct NGEdge {
   LayoutUnit start;
   LayoutUnit end;
 };
 
 }  // namespace blink
 
 #endif  // NGUnits_h