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Unified Diff: third_party/WebKit/Source/core/layout/ng/ng_block_layout_algorithm_test.cc

Issue 2714803002: [LayoutNG] Allow block-flow layout to be fragmented using new approach. (Closed)
Patch Set: spelling. Created 3 years, 10 months ago
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« third_party/WebKit/Source/core/layout/ng/ng_block_layout_algorithm.cc ('K') | « third_party/WebKit/Source/core/layout/ng/ng_block_layout_algorithm.cc ('k') | third_party/WebKit/Source/core/layout/ng/ng_block_node.h » ('j') | no next file with comments »
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Index: third_party/WebKit/Source/core/layout/ng/ng_block_layout_algorithm_test.cc
diff --git a/third_party/WebKit/Source/core/layout/ng/ng_block_layout_algorithm_test.cc b/third_party/WebKit/Source/core/layout/ng/ng_block_layout_algorithm_test.cc
index 11912e2a52e184ed73a6eec9d479c343590f92cb..58236786f62c75c9bfb0a6589c218903eb2a8e9d 100644
--- a/third_party/WebKit/Source/core/layout/ng/ng_block_layout_algorithm_test.cc
+++ b/third_party/WebKit/Source/core/layout/ng/ng_block_layout_algorithm_test.cc
@@ -26,15 +26,24 @@ namespace {
using testing::ElementsAre;
using testing::Pointee;
-NGConstraintSpace* ConstructConstraintSpace(NGWritingMode writing_mode,
- TextDirection direction,
- NGLogicalSize size,
- bool shrink_to_fit = false) {
+NGConstraintSpace* ConstructConstraintSpace(
+ NGWritingMode writing_mode,
+ TextDirection direction,
+ NGLogicalSize size,
+ bool shrink_to_fit = false,
+ LayoutUnit fragmentainer_space_available = LayoutUnit()) {
+ NGFragmentationType block_fragmentation =
+ fragmentainer_space_available != LayoutUnit()
+ ? NGFragmentationType::kFragmentColumn
+ : NGFragmentationType::kFragmentNone;
+
return NGConstraintSpaceBuilder(writing_mode)
.SetAvailableSize(size)
.SetPercentageResolutionSize(size)
.SetTextDirection(direction)
.SetIsShrinkToFit(shrink_to_fit)
+ .SetFragmentainerSpaceAvailable(fragmentainer_space_available)
+ .SetFragmentationType(block_fragmentation)
.ToConstraintSpace(writing_mode);
}
@@ -2174,5 +2183,268 @@ TEST_F(NGBlockLayoutAlgorithmTest,
clears_right_fragment->Offset());
}
+// Tests that a block won't fragment if it doesn't reach the fragmentation line.
+TEST_F(NGBlockLayoutAlgorithmTest, NoFragmentation) {
+ setBodyInnerHTML(R"HTML(
+ <!DOCTYPE html>
+ <style>
+ #container {
+ width: 150px;
+ height: 200px;
+ }
+ </style>
+ <div id='container'></div>
+ )HTML");
+
+ LayoutUnit kFragmentainerSpaceAvailable(200);
+
+ NGBlockNode* node = new NGBlockNode(
+ toLayoutBlockFlow(getLayoutObjectByElementId("container")));
+ auto* space = ConstructConstraintSpace(
+ kHorizontalTopBottom, TextDirection::kLtr,
+ NGLogicalSize(LayoutUnit(1000), NGSizeIndefinite), false,
+ kFragmentainerSpaceAvailable);
+
+ // We should only have one 150x200 fragment with no fragmentation.
+ RefPtr<const NGPhysicalFragment> fragment =
+ NGBlockLayoutAlgorithm(node, space).Layout()->PhysicalFragment();
+ EXPECT_EQ(NGPhysicalSize(LayoutUnit(150), LayoutUnit(200)), fragment->Size());
+ ASSERT_TRUE(fragment->BreakToken()->IsFinished());
+}
+
+// Tests that a block will fragment if it reaches the fragmentation line.
+TEST_F(NGBlockLayoutAlgorithmTest, SimpleFragmentation) {
+ setBodyInnerHTML(R"HTML(
+ <!DOCTYPE html>
+ <style>
+ #container {
+ width: 150px;
+ height: 300px;
+ }
+ </style>
+ <div id='container'></div>
+ )HTML");
+
+ LayoutUnit kFragmentainerSpaceAvailable(200);
+
+ NGBlockNode* node = new NGBlockNode(
+ toLayoutBlockFlow(getLayoutObjectByElementId("container")));
+ auto* space = ConstructConstraintSpace(
+ kHorizontalTopBottom, TextDirection::kLtr,
+ NGLogicalSize(LayoutUnit(1000), NGSizeIndefinite), false,
+ kFragmentainerSpaceAvailable);
+
+ RefPtr<const NGPhysicalFragment> fragment =
+ NGBlockLayoutAlgorithm(node, space).Layout()->PhysicalFragment();
+ EXPECT_EQ(NGPhysicalSize(LayoutUnit(150), LayoutUnit(200)), fragment->Size());
+ ASSERT_FALSE(fragment->BreakToken()->IsFinished());
+
+ fragment = NGBlockLayoutAlgorithm(node, space,
+ toNGBlockBreakToken(fragment->BreakToken()))
+ .Layout()
+ ->PhysicalFragment();
+ EXPECT_EQ(NGPhysicalSize(LayoutUnit(150), LayoutUnit(100)), fragment->Size());
+ ASSERT_TRUE(fragment->BreakToken()->IsFinished());
+}
+
+// Tests that children inside the same block formatting context fragment when
+// reaching a fragmentation line.
+TEST_F(NGBlockLayoutAlgorithmTest, InnerChildrenFragmentation) {
+ setBodyInnerHTML(R"HTML(
+ <!DOCTYPE html>
+ <style>
+ #container {
+ width: 150px;
+ padding-top: 20px;
+ }
+ #child1 {
+ height: 200px;
+ margin-bottom: 20px;
+ }
+ #child2 {
+ height: 100px;
+ margin-top: 20px;
+ }
+ </style>
+ <div id='container'>
+ <div id='child1'></div>
+ <div id='child2'></div>
+ </div>
+ )HTML");
+
+ LayoutUnit kFragmentainerSpaceAvailable(200);
+
+ NGBlockNode* node = new NGBlockNode(
+ toLayoutBlockFlow(getLayoutObjectByElementId("container")));
+ auto* space = ConstructConstraintSpace(
+ kHorizontalTopBottom, TextDirection::kLtr,
+ NGLogicalSize(LayoutUnit(1000), NGSizeIndefinite), false,
+ kFragmentainerSpaceAvailable);
+
+ RefPtr<const NGPhysicalFragment> fragment =
+ NGBlockLayoutAlgorithm(node, space).Layout()->PhysicalFragment();
+ EXPECT_EQ(NGPhysicalSize(LayoutUnit(150), LayoutUnit(200)), fragment->Size());
+ ASSERT_FALSE(fragment->BreakToken()->IsFinished());
+
+ FragmentChildIterator iterator(toNGPhysicalBoxFragment(fragment.get()));
+ const NGPhysicalBoxFragment* child = iterator.NextChild();
+ EXPECT_EQ(NGPhysicalSize(LayoutUnit(150), LayoutUnit(180)), child->Size());
+ EXPECT_EQ(NGPhysicalOffset(LayoutUnit(0), LayoutUnit(20)), child->Offset());
+
+ EXPECT_FALSE(iterator.NextChild());
+
+ fragment = NGBlockLayoutAlgorithm(node, space,
+ toNGBlockBreakToken(fragment->BreakToken()))
+ .Layout()
+ ->PhysicalFragment();
+ EXPECT_EQ(NGPhysicalSize(LayoutUnit(150), LayoutUnit(140)), fragment->Size());
+ ASSERT_TRUE(fragment->BreakToken()->IsFinished());
+
+ iterator.SetParent(toNGPhysicalBoxFragment(fragment.get()));
+ child = iterator.NextChild();
+ EXPECT_EQ(NGPhysicalSize(LayoutUnit(150), LayoutUnit(20)), child->Size());
+ EXPECT_EQ(NGPhysicalOffset(LayoutUnit(0), LayoutUnit(0)), child->Offset());
+
+ child = iterator.NextChild();
+ EXPECT_EQ(NGPhysicalSize(LayoutUnit(150), LayoutUnit(100)), child->Size());
+ EXPECT_EQ(NGPhysicalOffset(LayoutUnit(0), LayoutUnit(40)), child->Offset());
+
+ EXPECT_FALSE(iterator.NextChild());
+}
+
+// Tests that children which establish new formatting contexts fragment
+// correctly.
+TEST_F(NGBlockLayoutAlgorithmTest,
+ InnerFormattingContextChildrenFragmentation) {
+ setBodyInnerHTML(R"HTML(
+ <!DOCTYPE html>
+ <style>
+ #container {
+ width: 150px;
+ padding-top: 20px;
+ }
+ #child1 {
+ height: 200px;
+ margin-bottom: 20px;
+ contain: paint;
+ }
+ #child2 {
+ height: 100px;
+ margin-top: 20px;
+ contain: paint;
+ }
+ </style>
+ <div id='container'>
+ <div id='child1'></div>
+ <div id='child2'></div>
+ </div>
+ )HTML");
+
+ LayoutUnit kFragmentainerSpaceAvailable(200);
+
+ NGBlockNode* node = new NGBlockNode(
+ toLayoutBlockFlow(getLayoutObjectByElementId("container")));
+ auto* space = ConstructConstraintSpace(
+ kHorizontalTopBottom, TextDirection::kLtr,
+ NGLogicalSize(LayoutUnit(1000), NGSizeIndefinite), false,
+ kFragmentainerSpaceAvailable);
+
+ RefPtr<const NGPhysicalFragment> fragment =
+ NGBlockLayoutAlgorithm(node, space).Layout()->PhysicalFragment();
+ EXPECT_EQ(NGPhysicalSize(LayoutUnit(150), LayoutUnit(200)), fragment->Size());
+ ASSERT_FALSE(fragment->BreakToken()->IsFinished());
+
+ FragmentChildIterator iterator(toNGPhysicalBoxFragment(fragment.get()));
+ const NGPhysicalBoxFragment* child = iterator.NextChild();
+ EXPECT_EQ(NGPhysicalSize(LayoutUnit(150), LayoutUnit(180)), child->Size());
+ EXPECT_EQ(NGPhysicalOffset(LayoutUnit(0), LayoutUnit(20)), child->Offset());
+
+ EXPECT_FALSE(iterator.NextChild());
+
+ fragment = NGBlockLayoutAlgorithm(node, space,
+ toNGBlockBreakToken(fragment->BreakToken()))
+ .Layout()
+ ->PhysicalFragment();
+ EXPECT_EQ(NGPhysicalSize(LayoutUnit(150), LayoutUnit(140)), fragment->Size());
+ ASSERT_TRUE(fragment->BreakToken()->IsFinished());
+
+ iterator.SetParent(toNGPhysicalBoxFragment(fragment.get()));
+ child = iterator.NextChild();
+ EXPECT_EQ(NGPhysicalSize(LayoutUnit(150), LayoutUnit(20)), child->Size());
+ EXPECT_EQ(NGPhysicalOffset(LayoutUnit(0), LayoutUnit(0)), child->Offset());
+
+ child = iterator.NextChild();
+ EXPECT_EQ(NGPhysicalSize(LayoutUnit(150), LayoutUnit(100)), child->Size());
+ EXPECT_EQ(NGPhysicalOffset(LayoutUnit(0), LayoutUnit(40)), child->Offset());
+
+ EXPECT_FALSE(iterator.NextChild());
+}
+
+// Tests that children inside a block container will fragment if the container
+// doesn't reach the fragmentation line.
+TEST_F(NGBlockLayoutAlgorithmTest, InnerChildrenFragmentationSmallHeight) {
+ setBodyInnerHTML(R"HTML(
+ <!DOCTYPE html>
+ <style>
+ #container {
+ width: 150px;
+ padding-top: 20px;
+ height: 50px;
+ }
+ #child1 {
+ height: 200px;
+ margin-bottom: 20px;
+ }
+ #child2 {
+ height: 100px;
+ margin-top: 20px;
+ }
+ </style>
+ <div id='container'>
+ <div id='child1'></div>
+ <div id='child2'></div>
+ </div>
+ )HTML");
+
+ LayoutUnit kFragmentainerSpaceAvailable(200);
+
+ NGBlockNode* node = new NGBlockNode(
+ toLayoutBlockFlow(getLayoutObjectByElementId("container")));
+ auto* space = ConstructConstraintSpace(
+ kHorizontalTopBottom, TextDirection::kLtr,
+ NGLogicalSize(LayoutUnit(1000), NGSizeIndefinite), false,
+ kFragmentainerSpaceAvailable);
+
+ RefPtr<const NGPhysicalFragment> fragment =
+ NGBlockLayoutAlgorithm(node, space).Layout()->PhysicalFragment();
+ EXPECT_EQ(NGPhysicalSize(LayoutUnit(150), LayoutUnit(70)), fragment->Size());
+ ASSERT_FALSE(fragment->BreakToken()->IsFinished());
+
+ FragmentChildIterator iterator(toNGPhysicalBoxFragment(fragment.get()));
+ const NGPhysicalBoxFragment* child = iterator.NextChild();
+ EXPECT_EQ(NGPhysicalSize(LayoutUnit(150), LayoutUnit(180)), child->Size());
+ EXPECT_EQ(NGPhysicalOffset(LayoutUnit(0), LayoutUnit(20)), child->Offset());
+
+ EXPECT_FALSE(iterator.NextChild());
+
+ fragment = NGBlockLayoutAlgorithm(node, space,
+ toNGBlockBreakToken(fragment->BreakToken()))
+ .Layout()
+ ->PhysicalFragment();
+ EXPECT_EQ(NGPhysicalSize(LayoutUnit(150), LayoutUnit(0)), fragment->Size());
+ ASSERT_TRUE(fragment->BreakToken()->IsFinished());
+
+ iterator.SetParent(toNGPhysicalBoxFragment(fragment.get()));
+ child = iterator.NextChild();
+ EXPECT_EQ(NGPhysicalSize(LayoutUnit(150), LayoutUnit(20)), child->Size());
+ EXPECT_EQ(NGPhysicalOffset(LayoutUnit(0), LayoutUnit(0)), child->Offset());
+
+ child = iterator.NextChild();
+ EXPECT_EQ(NGPhysicalSize(LayoutUnit(150), LayoutUnit(100)), child->Size());
+ EXPECT_EQ(NGPhysicalOffset(LayoutUnit(0), LayoutUnit(40)), child->Offset());
+
+ EXPECT_FALSE(iterator.NextChild());
+}
+
} // namespace
} // namespace blink
« third_party/WebKit/Source/core/layout/ng/ng_block_layout_algorithm.cc ('K') | « third_party/WebKit/Source/core/layout/ng/ng_block_layout_algorithm.cc ('k') | third_party/WebKit/Source/core/layout/ng/ng_block_node.h » ('j') | no next file with comments »

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