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| 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "core/layout/ng/geometry/ng_box_strut.h" |
| 6 |
| 7 #include "wtf/text/WTFString.h" |
| 8 |
| 9 namespace blink { |
| 10 |
| 11 bool NGBoxStrut::IsEmpty() const { |
| 12 return *this == NGBoxStrut(); |
| 13 } |
| 14 |
| 15 bool NGBoxStrut::operator==(const NGBoxStrut& other) const { |
| 16 return std::tie(other.inline_start, other.inline_end, other.block_start, |
| 17 other.block_end) == |
| 18 std::tie(inline_start, inline_end, block_start, block_end); |
| 19 } |
| 20 |
| 21 // Converts physical dimensions to logical ones per |
| 22 // https://drafts.csswg.org/css-writing-modes-3/#logical-to-physical |
| 23 NGBoxStrut NGPhysicalBoxStrut::ConvertToLogical(NGWritingMode writing_mode, |
| 24 TextDirection direction) const { |
| 25 NGBoxStrut strut; |
| 26 switch (writing_mode) { |
| 27 case kHorizontalTopBottom: |
| 28 strut = {left, right, top, bottom}; |
| 29 break; |
| 30 case kVerticalRightLeft: |
| 31 case kSidewaysRightLeft: |
| 32 strut = {top, bottom, right, left}; |
| 33 break; |
| 34 case kVerticalLeftRight: |
| 35 strut = {top, bottom, left, right}; |
| 36 break; |
| 37 case kSidewaysLeftRight: |
| 38 strut = {bottom, top, left, right}; |
| 39 break; |
| 40 } |
| 41 if (direction == TextDirection::kRtl) |
| 42 std::swap(strut.inline_start, strut.inline_end); |
| 43 return strut; |
| 44 } |
| 45 |
| 46 String NGBoxStrut::ToString() const { |
| 47 return String::format("Inline: (%d %d) Block: (%d %d)", inline_start.toInt(), |
| 48 inline_end.toInt(), block_start.toInt(), |
| 49 block_end.toInt()); |
| 50 } |
| 51 |
| 52 std::ostream& operator<<(std::ostream& stream, const NGBoxStrut& value) { |
| 53 return stream << value.ToString(); |
| 54 } |
| 55 |
| 56 } // namespace blink |
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