| // Copyright 2016 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/dom/layout_tree_builder_traversal.h" |
| |
| #include "testing/gtest/include/gtest/gtest.h" |
| #include "third_party/blink/renderer/core/dom/document.h" |
| #include "third_party/blink/renderer/core/dom/element.h" |
| #include "third_party/blink/renderer/core/dom/node.h" |
| #include "third_party/blink/renderer/core/dom/pseudo_element.h" |
| #include "third_party/blink/renderer/core/layout/layout_text.h" |
| #include "third_party/blink/renderer/core/testing/core_unit_test_helper.h" |
| #include "third_party/blink/renderer/core/testing/dummy_page_holder.h" |
| |
| namespace blink { |
| |
| class LayoutTreeBuilderTraversalTest : public RenderingTest { |
| protected: |
| void SetupSampleHTML(const char* main_html); |
| }; |
| |
| void LayoutTreeBuilderTraversalTest::SetupSampleHTML(const char* main_html) { |
| SetBodyInnerHTML(String::FromUTF8(main_html)); |
| } |
| |
| TEST_F(LayoutTreeBuilderTraversalTest, emptySubTree) { |
| const char* const kHtml = "<div id='top'></div>"; |
| SetupSampleHTML(kHtml); |
| |
| Element* top = GetDocument().QuerySelector(AtomicString("#top")); |
| Element* body = GetDocument().QuerySelector(AtomicString("body")); |
| EXPECT_EQ(nullptr, LayoutTreeBuilderTraversal::FirstChild(*top)); |
| EXPECT_EQ(nullptr, LayoutTreeBuilderTraversal::NextSibling(*top)); |
| EXPECT_EQ(nullptr, LayoutTreeBuilderTraversal::PreviousSibling(*top)); |
| EXPECT_EQ(body, LayoutTreeBuilderTraversal::Parent(*top)); |
| } |
| |
| TEST_F(LayoutTreeBuilderTraversalTest, pseudos) { |
| const char* const kHtml = |
| "<style>" |
| "#top { display: list-item; }" |
| "#top::marker { content: \"baz\"; }" |
| "#top::before { content: \"foo\"; }" |
| "#top::after { content: \"bar\"; }" |
| "</style>" |
| "<div id='top'></div>"; |
| SetupSampleHTML(kHtml); |
| |
| Element* top = GetDocument().QuerySelector(AtomicString("#top")); |
| Element* marker = top->GetPseudoElement(kPseudoIdMarker); |
| Element* before = top->GetPseudoElement(kPseudoIdBefore); |
| Element* after = top->GetPseudoElement(kPseudoIdAfter); |
| EXPECT_EQ(marker, LayoutTreeBuilderTraversal::Next(*top, nullptr)); |
| EXPECT_EQ(before, LayoutTreeBuilderTraversal::NextSibling(*marker)); |
| EXPECT_EQ(after, LayoutTreeBuilderTraversal::NextSibling(*before)); |
| EXPECT_EQ(nullptr, LayoutTreeBuilderTraversal::NextSibling(*after)); |
| EXPECT_EQ(before, LayoutTreeBuilderTraversal::PreviousSibling(*after)); |
| EXPECT_EQ(marker, LayoutTreeBuilderTraversal::PreviousSibling(*before)); |
| EXPECT_EQ(nullptr, LayoutTreeBuilderTraversal::PreviousSibling(*marker)); |
| EXPECT_EQ(marker, LayoutTreeBuilderTraversal::FirstChild(*top)); |
| EXPECT_EQ(after, LayoutTreeBuilderTraversal::LastChild(*top)); |
| } |
| |
| TEST_F(LayoutTreeBuilderTraversalTest, emptyDisplayContents) { |
| const char* const kHtml = |
| "<div></div>" |
| "<div style='display: contents'></div>" |
| "<div id='last'></div>"; |
| SetupSampleHTML(kHtml); |
| |
| Element* first = GetDocument().QuerySelector(AtomicString("div")); |
| Element* last = GetDocument().QuerySelector(AtomicString("#last")); |
| |
| EXPECT_TRUE(last->GetLayoutObject()); |
| EXPECT_EQ(last->GetLayoutObject(), |
| LayoutTreeBuilderTraversal::NextSiblingLayoutObject(*first)); |
| } |
| |
| TEST_F(LayoutTreeBuilderTraversalTest, displayContentsChildren) { |
| const char* const kHtml = |
| "<div></div>" |
| "<div id='contents' style='display: contents'><div " |
| "id='inner'></div></div>" |
| "<div id='last'></div>"; |
| SetupSampleHTML(kHtml); |
| |
| Element* first = GetDocument().QuerySelector(AtomicString("div")); |
| Element* inner = GetDocument().QuerySelector(AtomicString("#inner")); |
| Element* contents = GetDocument().QuerySelector(AtomicString("#contents")); |
| Element* last = GetDocument().QuerySelector(AtomicString("#last")); |
| |
| EXPECT_TRUE(inner->GetLayoutObject()); |
| EXPECT_TRUE(last->GetLayoutObject()); |
| EXPECT_TRUE(first->GetLayoutObject()); |
| EXPECT_FALSE(contents->GetLayoutObject()); |
| |
| EXPECT_EQ(inner->GetLayoutObject(), |
| LayoutTreeBuilderTraversal::NextSiblingLayoutObject(*first)); |
| EXPECT_EQ(first->GetLayoutObject(), |
| LayoutTreeBuilderTraversal::PreviousSiblingLayoutObject(*inner)); |
| |
| EXPECT_EQ(last->GetLayoutObject(), |
| LayoutTreeBuilderTraversal::NextSiblingLayoutObject(*inner)); |
| EXPECT_EQ(inner->GetLayoutObject(), |
| LayoutTreeBuilderTraversal::PreviousSiblingLayoutObject(*last)); |
| } |
| |
| TEST_F(LayoutTreeBuilderTraversalTest, displayContentsChildrenNested) { |
| const char* const kHtml = |
| "<div></div>" |
| "<div style='display: contents'>" |
| "<div style='display: contents'>" |
| "<div id='inner'></div>" |
| "<div id='inner-sibling'></div>" |
| "</div>" |
| "</div>" |
| "<div id='last'></div>"; |
| SetupSampleHTML(kHtml); |
| |
| Element* first = GetDocument().QuerySelector(AtomicString("div")); |
| Element* inner = GetDocument().QuerySelector(AtomicString("#inner")); |
| Element* sibling = |
| GetDocument().QuerySelector(AtomicString("#inner-sibling")); |
| Element* last = GetDocument().QuerySelector(AtomicString("#last")); |
| |
| EXPECT_TRUE(first->GetLayoutObject()); |
| EXPECT_TRUE(inner->GetLayoutObject()); |
| EXPECT_TRUE(sibling->GetLayoutObject()); |
| EXPECT_TRUE(last->GetLayoutObject()); |
| |
| EXPECT_EQ(inner->GetLayoutObject(), |
| LayoutTreeBuilderTraversal::NextSiblingLayoutObject(*first)); |
| EXPECT_EQ(first->GetLayoutObject(), |
| LayoutTreeBuilderTraversal::PreviousSiblingLayoutObject(*inner)); |
| |
| EXPECT_EQ(sibling->GetLayoutObject(), |
| LayoutTreeBuilderTraversal::NextSiblingLayoutObject(*inner)); |
| EXPECT_EQ(inner->GetLayoutObject(), |
| LayoutTreeBuilderTraversal::PreviousSiblingLayoutObject(*sibling)); |
| |
| EXPECT_EQ(last->GetLayoutObject(), |
| LayoutTreeBuilderTraversal::NextSiblingLayoutObject(*sibling)); |
| EXPECT_EQ(sibling->GetLayoutObject(), |
| LayoutTreeBuilderTraversal::PreviousSiblingLayoutObject(*last)); |
| } |
| |
| TEST_F(LayoutTreeBuilderTraversalTest, limits) { |
| const char* const kHtml = |
| "<div></div>" |
| "<div style='display: contents'></div>" |
| "<div style='display: contents'>" |
| "<div style='display: contents'>" |
| "</div>" |
| "</div>" |
| "<div id='shouldNotBeFound'></div>"; |
| |
| SetupSampleHTML(kHtml); |
| |
| Element* first = GetDocument().QuerySelector(AtomicString("div")); |
| |
| EXPECT_TRUE(first->GetLayoutObject()); |
| LayoutObject* next_sibling = |
| LayoutTreeBuilderTraversal::NextSiblingLayoutObject(*first, 2); |
| EXPECT_FALSE(next_sibling); // Should not overrecurse |
| } |
| |
| } // namespace blink |