| // Copyright 2023 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "third_party/blink/renderer/core/layout/ng/inline/ng_paragraph_line_breaker.h" |
| |
| #include "third_party/blink/renderer/core/layout/ng/inline/ng_inline_node.h" |
| #include "third_party/blink/renderer/core/layout/ng/ng_constraint_space_builder.h" |
| #include "third_party/blink/renderer/core/layout/ng/ng_physical_box_fragment.h" |
| #include "third_party/blink/renderer/core/testing/core_unit_test_helper.h" |
| |
| namespace blink { |
| |
| class NGParagraphLineBreakerTest : public RenderingTest { |
| public: |
| absl::optional<LayoutUnit> AttemptParagraphBalancing(const char* id) { |
| auto* layout_object = To<LayoutBlockFlow>(GetLayoutObjectByElementId(id)); |
| const NGPhysicalBoxFragment* fragment = |
| layout_object->GetPhysicalFragment(0); |
| const LayoutUnit width = fragment->Size().width; |
| |
| NGInlineNode node(layout_object); |
| NGConstraintSpaceBuilder builder( |
| WritingMode::kHorizontalTb, |
| {WritingMode::kHorizontalTb, TextDirection::kLtr}, |
| /* is_new_fc */ false); |
| builder.SetAvailableSize(LogicalSize(width, LayoutUnit::Max())); |
| NGConstraintSpace space = builder.ToConstraintSpace(); |
| NGLineLayoutOpportunity line_opportunity(width); |
| return NGParagraphLineBreaker::AttemptParagraphBalancing(node, space, |
| line_opportunity); |
| } |
| }; |
| |
| TEST_F(NGParagraphLineBreakerTest, ShouldFailByBlockInInline) { |
| SetBodyInnerHTML(R"HTML( |
| <!DOCTYPE html> |
| <style> |
| #target { |
| font-size: 10px; |
| width: 10ch; |
| } |
| </style> |
| <div id="target"> |
| <span> |
| 1234 6789 |
| 1234 6789 |
| <div>block-in-inline</div> |
| 1234 6789 |
| 1234 6789 |
| </span> |
| </div> |
| )HTML"); |
| EXPECT_FALSE(AttemptParagraphBalancing("target")); |
| } |
| |
| TEST_F(NGParagraphLineBreakerTest, ShouldFailByFloat) { |
| SetBodyInnerHTML(R"HTML( |
| <!DOCTYPE html> |
| <style> |
| #target { |
| font-size: 10px; |
| width: 10ch; |
| } |
| .float { float: left; } |
| </style> |
| <div id="target"> |
| 1234 6789 |
| <div class="float">float</div> |
| 1234 6789 |
| </div> |
| )HTML"); |
| EXPECT_FALSE(AttemptParagraphBalancing("target")); |
| } |
| |
| TEST_F(NGParagraphLineBreakerTest, ShouldFailByForcedBreak) { |
| SetBodyInnerHTML(R"HTML( |
| <!DOCTYPE html> |
| <style> |
| #target { |
| font-size: 10px; |
| width: 10ch; |
| } |
| </style> |
| <div id="target"> |
| 1234 6789 |
| <br> |
| 1234 6789 |
| </div> |
| )HTML"); |
| EXPECT_FALSE(AttemptParagraphBalancing("target")); |
| } |
| |
| TEST_F(NGParagraphLineBreakerTest, ShouldFailByInitialLetter) { |
| SetBodyInnerHTML(R"HTML( |
| <!DOCTYPE html> |
| <style> |
| #target { |
| font-size: 10px; |
| width: 10ch; |
| } |
| #target::first-letter { |
| initial-letter: 2; |
| } |
| </style> |
| <div id="target"> |
| 1234 6789 |
| 1234 6789 |
| </div> |
| )HTML"); |
| EXPECT_FALSE(AttemptParagraphBalancing("target")); |
| } |
| |
| } // namespace blink |
