Meta+LibWeb: Generate accumulated visual context property metadata

Style invalidation kept the list of properties that require rebuilding
the accumulated visual context tree in StyleInvalidation.cpp. That made
the classification separate from the existing property metadata used for
layout and stacking-context invalidation.

Move that classification into Properties.json and teach the PropertyID
generator to emit property_affects_accumulated_visual_contexts(). Style
invalidation now uses the generated predicate, preserving the existing
property set and behavior while making future classification changes
data-driven.

Libraries/LibWeb/CSS/Properties.json

@@ -460,6 +460,7 @@
     "multiplicity": "coordinating-list"
   },
   "background-attachment": {
+    "affects-accumulated-visual-contexts": true,
     "affects-layout": false,
     "animation-type": "discrete",
     "inherited": false,
@@ -1349,6 +1350,7 @@
     ]
   },
   "clip": {
+    "affects-accumulated-visual-contexts": true,
     "affects-layout": false,
     "animation-type": "by-computed-value",
     "inherited": false,
@@ -1365,6 +1367,7 @@
     ]
   },
   "clip-path": {
+    "affects-accumulated-visual-contexts": true,
     "animation-type": "by-computed-value",
     "affects-layout": false,
     "affects-stacking-context": true,
@@ -1893,6 +1896,7 @@
     ]
   },
   "filter": {
+    "affects-accumulated-visual-contexts": true,
     "affects-layout": false,
     "affects-stacking-context": true,
     "animation-type": "custom",
@@ -3170,6 +3174,7 @@
     ]
   },
   "mix-blend-mode": {
+    "affects-accumulated-visual-contexts": true,
     "affects-layout": false,
     "animation-type": "discrete",
     "inherited": false,
@@ -3202,6 +3207,7 @@
     "percentages-resolve-to": "length"
   },
   "opacity": {
+    "affects-accumulated-visual-contexts": true,
     "animation-type": "by-computed-value",
     "affects-layout": false,
     "affects-stacking-context": true,
@@ -3583,6 +3589,7 @@
     ]
   },
   "perspective": {
+    "affects-accumulated-visual-contexts": true,
     "animation-type": "by-computed-value",
     "inherited": false,
     "initial": "none",
@@ -3595,6 +3602,7 @@
     ]
   },
   "perspective-origin": {
+    "affects-accumulated-visual-contexts": true,
     "animation-type": "by-computed-value",
     "affects-layout": false,
     "inherited": false,
@@ -3768,6 +3776,7 @@
     "needs-layout-for-getcomputedstyle": true
   },
   "rotate": {
+    "affects-accumulated-visual-contexts": true,
     "animation-type": "custom",
     "inherited": false,
     "initial": "none",
@@ -3826,6 +3835,7 @@
     ]
   },
   "scale": {
+    "affects-accumulated-visual-contexts": true,
     "animation-type": "custom",
     "inherited": false,
     "initial": "none",
@@ -4510,6 +4520,7 @@
     ]
   },
   "transform": {
+    "affects-accumulated-visual-contexts": true,
     "animation-type": "custom",
     "inherited": false,
     "initial": "none",
@@ -4536,6 +4547,7 @@
     ]
   },
   "transform-origin": {
+    "affects-accumulated-visual-contexts": true,
     "affects-layout": false,
     "animation-type": "by-computed-value",
     "inherited": false,
@@ -4637,6 +4649,7 @@
     ]
   },
   "translate": {
+    "affects-accumulated-visual-contexts": true,
     "animation-type": "custom",
     "inherited": false,
     "initial": "none",

Libraries/LibWeb/CSS/StyleInvalidation.cpp

@@ -135,23 +135,8 @@ RequiredInvalidationAfterStyleChange compute_property_invalidation(CSS::Property
     }
     invalidation.repaint = true;
 
-    // Transform, perspective, clip, clip-path, effects, and background-attachment properties require rebuilding AccumulatedVisualContext tree.
-    if (AK::first_is_one_of(property_id,
-            CSS::PropertyID::Transform,
-            CSS::PropertyID::Rotate,
-            CSS::PropertyID::Scale,
-            CSS::PropertyID::Translate,
-            CSS::PropertyID::Perspective,
-            CSS::PropertyID::TransformOrigin,
-            CSS::PropertyID::PerspectiveOrigin,
-            CSS::PropertyID::Clip,
-            CSS::PropertyID::ClipPath,
-            CSS::PropertyID::Opacity,
-            CSS::PropertyID::MixBlendMode,
-            CSS::PropertyID::Filter,
-            CSS::PropertyID::BackgroundAttachment)) {
+    if (CSS::property_affects_accumulated_visual_contexts(property_id))
         invalidation.rebuild_accumulated_visual_contexts = true;
-    }
 
     return invalidation;
 }

Meta/Generators/generate_libweb_css_property_id.py

@@ -291,6 +291,7 @@ size_t property_maximum_value_count(PropertyID);
 
 bool property_affects_layout(PropertyID);
 bool property_affects_stacking_context(PropertyID);
+bool property_affects_accumulated_visual_contexts(PropertyID);
 bool property_needs_layout_for_getcomputedstyle(PropertyID);
 bool property_needs_layout_node_for_resolved_value(PropertyID);
 
@@ -548,6 +549,23 @@ bool property_affects_stacking_context(PropertyID property_id)
     }
 }
 
+bool property_affects_accumulated_visual_contexts(PropertyID property_id)
+{
+    switch (property_id) {
+""")
+
+    for name, value in properties.items():
+        if is_legacy_alias(value):
+            continue
+        if value.get("affects-accumulated-visual-contexts", False):
+            out.write(f"    case PropertyID::{title_casify(name)}:\n")
+    out.write("""
+        return true;
+    default:
+        return false;
+    }
+}
+
 bool property_needs_layout_for_getcomputedstyle(PropertyID property_id)
 {
     switch (property_id) {