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// Copyright 2018 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.
#include "third_party/blink/renderer/core/css/css_computed_style_declaration.h"
#include "third_party/blink/renderer/core/dom/shadow_root.h"
#include "third_party/blink/renderer/core/html/html_element.h"
#include "third_party/blink/renderer/core/testing/page_test_base.h"
namespace blink {
class CSSComputedStyleDeclarationTest : public PageTestBase {};
TEST_F(CSSComputedStyleDeclarationTest, CleanAncestorsNoRecalc) {
GetDocument().body()->SetInnerHTMLFromString(R"HTML(
<div id=dirty></div>
<div>
<div id=target style='color:green'></div>
</div>
)HTML");
UpdateAllLifecyclePhasesForTest();
EXPECT_FALSE(GetDocument().NeedsLayoutTreeUpdate());
GetDocument().getElementById("dirty")->setAttribute("style", "color:pink");
EXPECT_TRUE(GetDocument().NeedsLayoutTreeUpdate());
Element* target = GetDocument().getElementById("target");
auto* computed = MakeGarbageCollected<CSSComputedStyleDeclaration>(target);
EXPECT_EQ("rgb(0, 128, 0)",
computed->GetPropertyValue(CSSPropertyID::kColor));
EXPECT_TRUE(GetDocument().NeedsLayoutTreeUpdate());
}
TEST_F(CSSComputedStyleDeclarationTest, CleanShadowAncestorsNoRecalc) {
GetDocument().body()->SetInnerHTMLFromString(R"HTML(
<div id=dirty></div>
<div id=host></div>
)HTML");
Element* host = GetDocument().getElementById("host");
ShadowRoot& shadow_root =
host->AttachShadowRootInternal(ShadowRootType::kOpen);
shadow_root.SetInnerHTMLFromString(R"HTML(
<div id=target style='color:green'></div>
)HTML");
UpdateAllLifecyclePhasesForTest();
EXPECT_FALSE(GetDocument().NeedsLayoutTreeUpdate());
GetDocument().getElementById("dirty")->setAttribute("style", "color:pink");
EXPECT_TRUE(GetDocument().NeedsLayoutTreeUpdate());
Element* target = shadow_root.getElementById("target");
auto* computed = MakeGarbageCollected<CSSComputedStyleDeclaration>(target);
EXPECT_EQ("rgb(0, 128, 0)",
computed->GetPropertyValue(CSSPropertyID::kColor));
EXPECT_TRUE(GetDocument().NeedsLayoutTreeUpdate());
}
TEST_F(CSSComputedStyleDeclarationTest, NeedsAdjacentStyleRecalc) {
GetDocument().body()->SetInnerHTMLFromString(R"HTML(
<style>
#a + #b { color: green }
</style>
<div id="container" style="display:none">
<span id="a"></span>
<span id="b">
<span id="c"></span>
<span id="d"></span>
</span>
</div>
)HTML");
UpdateAllLifecyclePhasesForTest();
EXPECT_FALSE(GetDocument().NeedsLayoutTreeUpdate());
Element* container = GetDocument().getElementById("container");
Element* c_span = GetDocument().getElementById("c");
Element* d_span = GetDocument().getElementById("d");
d_span->setAttribute("style", "color:pink");
EXPECT_FALSE(GetDocument().NeedsLayoutTreeUpdate());
EXPECT_FALSE(GetDocument().NeedsLayoutTreeUpdateForNode(*d_span));
EXPECT_FALSE(GetDocument().NeedsLayoutTreeUpdateForNode(*c_span));
EXPECT_FALSE(GetDocument().NeedsLayoutTreeUpdateForNode(*c_span, true));
EXPECT_FALSE(container->NeedsAdjacentStyleRecalc());
auto* computed = MakeGarbageCollected<CSSComputedStyleDeclaration>(c_span);
EXPECT_EQ("rgb(0, 128, 0)",
computed->GetPropertyValue(CSSPropertyID::kColor));
d_span->setAttribute("style", "color:green");
EXPECT_TRUE(GetDocument().NeedsLayoutTreeUpdate());
EXPECT_TRUE(GetDocument().NeedsLayoutTreeUpdateForNode(*d_span));
EXPECT_TRUE(GetDocument().NeedsLayoutTreeUpdateForNode(*c_span));
EXPECT_FALSE(GetDocument().NeedsLayoutTreeUpdateForNode(*c_span, true));
EXPECT_TRUE(container->NeedsAdjacentStyleRecalc());
}
TEST_F(CSSComputedStyleDeclarationTest,
NoCrashWhenCallingGetPropertyCSSValueWithVariable) {
UpdateAllLifecyclePhasesForTest();
Element* target = GetDocument().body();
auto* computed = MakeGarbageCollected<CSSComputedStyleDeclaration>(target);
ASSERT_TRUE(computed);
const CSSValue* result =
computed->GetPropertyCSSValue(CSSPropertyID::kVariable);
EXPECT_FALSE(result);
// Don't crash.
}
} // namespace blink
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