[IFC][Intrinsic width] Add support for content with fixed (logical) w…

…idth

https://bugs.webkit.org/show_bug.cgi?id=271016

Reviewed by Antti Koivisto.

* Source/WebCore/layout/integration/LayoutIntegrationCoverage.cpp:
(WebCore::LayoutIntegration::canUseForPreferredWidthComputation):
* Source/WebCore/layout/integration/inline/LayoutIntegrationBoxGeometryUpdater.cpp:
(WebCore::LayoutIntegration::BoxGeometryUpdater::updateLayoutBoxDimensions):
(WebCore::LayoutIntegration::BoxGeometryUpdater::setGeometriesForIntrinsicWidth):

Canonical link: https://commits.webkit.org/276250@main

Source/WebCore/layout/integration/LayoutIntegrationCoverage.cpp

@@ -78,6 +78,13 @@ bool canUseForPreferredWidthComputation(const RenderBlockFlow& blockContainer)
             continue;
         if (is<RenderInline>(renderer))
             continue;
+        if (renderer.isInFlow() && renderer.style().isHorizontalWritingMode() && renderer.style().logicalWidth().isFixed()) {
+            // FIXME: Implement this image special in line builder.
+            auto allowImagesToBreak = !blockContainer.document().inQuirksMode() || !blockContainer.isRenderTableCell();
+            if (!allowImagesToBreak)
+                return false;
+            continue;
+        }
         return false;
     }
     return true;

Source/WebCore/layout/integration/inline/LayoutIntegrationBoxGeometryUpdater.cpp

@@ -231,7 +231,11 @@ void BoxGeometryUpdater::updateLayoutBoxDimensions(const RenderBox& renderBox, s
 
     if (intrinsicWidthMode) {
         boxGeometry.setHorizontalSpaceForScrollbar(scrollbarSize.width());
-        boxGeometry.setContentBoxWidth(*intrinsicWidthMode == Layout::IntrinsicWidthMode::Minimum ? renderBox.minPreferredLogicalWidth() : renderBox.maxPreferredLogicalWidth());
+        auto contentBoxLogicalWidth = [&] {
+            auto preferredWidth = *intrinsicWidthMode == Layout::IntrinsicWidthMode::Minimum ? renderBox.minPreferredLogicalWidth() : renderBox.maxPreferredLogicalWidth();
+            return preferredWidth - (border.horizontal.start + border.horizontal.end + padding.horizontal.start + padding.horizontal.end);
+        };
+        boxGeometry.setContentBoxWidth(contentBoxLogicalWidth());
         boxGeometry.setHorizontalMargin(inlineMargin);
         boxGeometry.setHorizontalBorder(border.horizontal);
         boxGeometry.setHorizontalPadding(padding.horizontal);
@@ -372,6 +376,11 @@ void BoxGeometryUpdater::setGeometriesForIntrinsicWidth(Layout::IntrinsicWidthMo
             updateInlineBoxDimensions(*renderInline, intrinsicWidthMode);
             continue;
         }
+        if (auto* renderBox = dynamicDowncast<RenderBox>(renderer)) {
+            // FIXME: Add support for flexing boxes.
+            ASSERT(renderBox->style().logicalWidth().isFixed());
+            updateLayoutBoxDimensions(*renderBox, intrinsicWidthMode);
+        }
     }
 }