[content-visibility] Make c-v: auto add auto to contain-intrinsic-size

https://bugs.webkit.org/show_bug.cgi?id=259645

Reviewed by Tim Nguyen.

This was approved here:
w3c/csswg-drafts#8407 (comment)

Already implemented in Chromium and gecko.

* LayoutTests/imported/w3c/web-platform-tests/css/css-contain/content-visibility/content-visibility-068-expected.txt:
* Source/WebCore/rendering/style/RenderStyle.h:
* Source/WebCore/rendering/style/RenderStyleSetters.h:
(WebCore::RenderStyle::containIntrinsicWidthAddAuto):
(WebCore::RenderStyle::containIntrinsicHeightAddAuto):
* Source/WebCore/style/StyleAdjuster.cpp:
(WebCore::Style::Adjuster::adjust const):

Canonical link: https://commits.webkit.org/267180@main

LayoutTests/imported/w3c/web-platform-tests/css/css-contain/content-visibility/content-visibility-068-expected.txt

@@ -1,3 +1,3 @@
 
-FAIL Content Visibility: off-screen focus assert_equals: step5 height expected 10 but got 100
+PASS Content Visibility: off-screen focus
 

Source/WebCore/rendering/style/RenderStyle.h

@@ -711,6 +711,8 @@ class RenderStyle {
     inline bool containIntrinsicHeightHasAuto() const;
     inline bool containIntrinsicLogicalWidthHasAuto() const;
     inline bool containIntrinsicLogicalHeightHasAuto() const;
+    inline void containIntrinsicWidthAddAuto();
+    inline void containIntrinsicHeightAddAuto();
     inline std::optional<Length> containIntrinsicWidth() const;
     inline std::optional<Length> containIntrinsicHeight() const;
     inline bool hasAutoLengthContainIntrinsicSize() const;

Source/WebCore/rendering/style/RenderStyleSetters.h

@@ -556,6 +556,22 @@ inline bool RenderStyle::setZoom(float zoomLevel)
     return true;
 }
 
+inline void RenderStyle::containIntrinsicWidthAddAuto()
+{
+    if (containIntrinsicWidthType() == ContainIntrinsicSizeType::None)
+        setContainIntrinsicWidthType(ContainIntrinsicSizeType::AutoAndNone);
+    else if (containIntrinsicWidthType() == ContainIntrinsicSizeType::Length)
+        setContainIntrinsicWidthType(ContainIntrinsicSizeType::AutoAndLength);
+}
+
+inline void RenderStyle::containIntrinsicHeightAddAuto()
+{
+    if (containIntrinsicHeightType() == ContainIntrinsicSizeType::None)
+        setContainIntrinsicHeightType(ContainIntrinsicSizeType::AutoAndNone);
+    else if (containIntrinsicHeightType() == ContainIntrinsicSizeType::Length)
+        setContainIntrinsicHeightType(ContainIntrinsicSizeType::AutoAndLength);
+}
+
 #if ENABLE(CSS_COMPOSITING)
 
 inline void RenderStyle::setBlendMode(BlendMode mode)

Source/WebCore/style/StyleAdjuster.cpp

@@ -619,6 +619,11 @@ void Adjuster::adjust(RenderStyle& style, const RenderStyle* userAgentAppearance
     if (isSkippedContentRoot(style, m_element) && m_parentStyle.contentVisibility() != ContentVisibility::Hidden)
         style.setSkippedContentReason(style.contentVisibility());
 
+    if (style.contentVisibility() == ContentVisibility::Auto) {
+        style.containIntrinsicWidthAddAuto();
+        style.containIntrinsicHeightAddAuto();
+    }
+
     adjustForSiteSpecificQuirks(style);
 }