Merge pull request #803 from SceneTech/feature/css-text-wrap-802

Implement CSS text-wrap layout mode

Author: wieslawsoltes

docs/validation/code-oss-css-text-wrap-802.md

@@ -0,0 +1,37 @@
+# Code OSS CSS text-wrap implementation (#802)
+
+## Product trigger
+
+Unchanged Code OSS has 10 `text-wrap` declarations across 9 CSS files. The
+bounded values are `nowrap`, `wrap`, and one `initial` reset across diff and
+placeholder text, hovers, Changes, Chat status/anchors/code pills, and notebook
+content.
+
+## Implemented slice
+
+- Adds generated native/managed identity, validation, and CSSOM for the
+  product-used `wrap|nowrap` mode plus CSS-wide reset/inheritance behavior.
+- Retains the inherited mode in cold textual style independently from
+  `white-space`; computed `white-space` therefore remains browser-shaped.
+- Composes the mode with the existing retained inline/layout/scene wrap
+  decision, including word-break and overflow-wrap behavior.
+- Uses ordinary coalesced layout invalidation and adds no timer, frame
+  participant, platform text widget, document scan, browser shell, or Code OSS
+  patch.
+
+`balance`, `pretty`, `stable`, and the complete Text Level 4 shorthand grammar
+remain outside this bounded slice.
+
+## Authored gates
+
+- `contracts/css-text-wrap-mode.html`: inheritance, computed CSSOM, invalid
+  writes, mutation/removal, overflow, and height change.
+- `test_css_text_wrap_layout`: native inheritance and retained geometry.
+- `css-text-wrap-performance`: 4,096 text nodes, ten forced layout checkpoints,
+  bounded layout/publication, and a five-second guardrail.
+
+## Evidence state
+
+Implementation and gates are authored from source review. Per the active fast
+merge direction, no build, test, WPT, visual, package, memory, lifecycle, or
+performance command was executed. Evidence remains zero until full validation.

experiments/WebScene.NativeEngine.Probe/native/css_property_metadata.json

@@ -157,7 +157,8 @@
     {"id": "overscroll_behavior_x", "name": "overscroll-behavior-x", "aliases": ["overscrollbehaviorx"]},
     {"id": "overscroll_behavior_y", "name": "overscroll-behavior-y", "aliases": ["overscrollbehaviory"]},
     {"id": "isolation", "name": "isolation"},
-    {"id": "will_change", "name": "will-change", "aliases": ["willchange"]}
+    {"id": "will_change", "name": "will-change", "aliases": ["willchange"]},
+    {"id": "text_wrap", "name": "text-wrap", "aliases": ["textwrap"]}
   ],
   "nativeStorageOnlyProperties": [
     "accent-color", "align-content", "animation-direction", "animation-fill-mode", "animation-play-state",
@@ -179,7 +180,7 @@
       "justify_content", "box_sizing", "vertical_align", "grid_auto_flow", "border_collapse", "table_layout", "border_style", "background_repeat",
       "visibility", "pointer_events", "text_anchor", "font_smoothing", "text_align", "text_transform", "white_space", "word_break", "overflow_wrap", "list_style_position",
       "list_style_type", "scrollbar_width", "container", "container_type", "content_visibility", "object_fit", "user_select",
-      "overscroll_behavior", "overscroll_behavior_x", "overscroll_behavior_y", "isolation", "will_change"
+      "overscroll_behavior", "overscroll_behavior_x", "overscroll_behavior_y", "isolation", "will_change", "text_wrap"
     ],
     "componentList": [
       "container_name", "background_position", "background_size", "transition", "transition_property", "transition_duration",
@@ -223,7 +224,7 @@
     "outline", "outline_width", "outline_color", "animation", "animation_name", "animation_duration", "animation_delay",
     "animation_timing_function", "animation_iteration_count", "background_repeat", "background_position", "background_size",
     "font", "text_transform", "word_break", "overflow_wrap", "list_style", "list_style_position", "list_style_type",
-    "object_fit", "object_position", "user_select", "overscroll_behavior", "overscroll_behavior_x", "overscroll_behavior_y", "isolation", "will_change"
+    "object_fit", "object_position", "user_select", "overscroll_behavior", "overscroll_behavior_x", "overscroll_behavior_y", "isolation", "will_change", "text_wrap"
   ],
   "managedKnownProperties": [
     "align-content", "align-items", "align-self", "all", "background", "background-color",
@@ -245,7 +246,7 @@
     "top", "transform", "visibility", "white-space", "word-break", "overflow-wrap", "width", "word-spacing", "z-index",
     "outline", "outline-color", "outline-offset", "outline-style", "outline-width",
     "grid-template-areas", "aspect-ratio", "object-fit", "object-position", "user-select",
-    "overscroll-behavior", "overscroll-behavior-x", "overscroll-behavior-y", "isolation", "will-change"
+    "overscroll-behavior", "overscroll-behavior-x", "overscroll-behavior-y", "isolation", "will-change", "text-wrap"
   ],
   "supportedPropertyExtras": [
     "animation", "animation-delay", "animation-direction", "animation-duration", "animation-fill-mode",

experiments/WebScene.NativeEngine.Probe/native/generated/webscene_css_property_identity.inc

@@ -234,6 +234,8 @@ inline constexpr std::array native_typed_property_identity_catalog{
     native_typed_property_identity{"isolation", css_property_id::isolation},
     native_typed_property_identity{"will-change", css_property_id::will_change},
     native_typed_property_identity{"willchange", css_property_id::will_change},
+    native_typed_property_identity{"text-wrap", css_property_id::text_wrap},
+    native_typed_property_identity{"textwrap", css_property_id::text_wrap},
 };
 
 inline constexpr std::array<std::string_view, 62> native_storage_only_property_catalog{
@@ -459,6 +461,7 @@ inline constexpr std::array native_modeled_property_mask_catalog{
     false,
     false,
     false,
+    false,
 };
 
 inline constexpr bool generated_property_has_modeled_mask(
@@ -663,6 +666,7 @@ inline constexpr std::array native_property_grammar_catalog{
     native_property_grammar::keyword,
     native_property_grammar::keyword,
     native_property_grammar::keyword,
+    native_property_grammar::keyword,
 };
 
 inline constexpr native_property_grammar generated_property_grammar(
@@ -905,5 +909,7 @@ inline css_property_id generated_property_id_lowercase(std::string_view name) no
     if (name == "isolation") return css_property_id::isolation;
     if (name == "will-change") return css_property_id::will_change;
     if (name == "willchange") return css_property_id::will_change;
+    if (name == "text-wrap") return css_property_id::text_wrap;
+    if (name == "textwrap") return css_property_id::text_wrap;
     return css_property_id::unknown;
 }

experiments/WebScene.NativeEngine.Probe/native/generated/webscene_css_property_ids.inc

@@ -156,3 +156,4 @@ overscroll_behavior_x,
 overscroll_behavior_y,
 isolation,
 will_change,
+text_wrap,

experiments/WebScene.NativeEngine.Probe/native/generated/webscene_css_supported_properties.inc

@@ -236,6 +236,7 @@ inline constexpr std::array cssom_supported_property_catalog{
     cssom_supported_property_metadata{"text-indent", "textIndent"},
     cssom_supported_property_metadata{"text-overflow", "textOverflow"},
     cssom_supported_property_metadata{"text-transform", "textTransform"},
+    cssom_supported_property_metadata{"text-wrap", "textWrap"},
     cssom_supported_property_metadata{"top", "top"},
     cssom_supported_property_metadata{"transform", "transform"},
     cssom_supported_property_metadata{"transform-origin", "transformOrigin"},
@@ -261,4 +262,4 @@ inline constexpr std::array cssom_supported_property_catalog{
     cssom_supported_property_metadata{"zoom", "zoom"},
 };
 
-inline constexpr auto cssom_style_template_property_accessor_count = 464U;
+inline constexpr auto cssom_style_template_property_accessor_count = 466U;

experiments/WebScene.NativeEngine.Probe/native/webscene_css_cascade_reset.h

@@ -226,6 +226,7 @@ inline void reset_cascaded_style(dom_node& node,
             }
             textual->word_break.clear();
             textual->overflow_wrap.clear();
+            textual->text_wrap.clear();
             textual->object_fit.clear();
             textual->object_position.clear();
             textual->user_select.clear();

experiments/WebScene.NativeEngine.Probe/native/webscene_css_reset.h

@@ -231,6 +231,9 @@ inline void apply_all_unset(
         reset.mutable_textual().overflow_wrap =
             previous.textual().overflow_wrap;
     }
+    if (has_inline({"text-wrap"})) {
+        reset.mutable_textual().text_wrap = previous.textual().text_wrap;
+    }
     if (has_inline({"object-fit"})) {
         reset.mutable_textual().object_fit =
             previous.textual().object_fit;

experiments/WebScene.NativeEngine.Probe/native/webscene_css_specified_coverage.h

@@ -13,6 +13,7 @@ inline constexpr auto specified_property_samples = std::to_array<specified_prope
     {"overscroll-behavior","contain none"},{"overscroll-behavior-x","auto"},{"overscroll-behavior-y","contain"},
         {"isolation","isolate"},
         {"will-change","transform, opacity"},
+        {"text-wrap","nowrap"},
     {"width","12px"},{"height","20%"},{"min-width","1rem"},{"min-height","2px"},
     {"max-width","none"},{"max-height","fit-content"},
     {"left","1px"},{"top","2px"},{"right","3px"},{"bottom","4px"},{"inset","1px 2px 3px 4px"},

experiments/WebScene.NativeEngine.Probe/native/webscene_css_text_values.h

@@ -406,6 +406,16 @@ bool apply_text_value(dom_node& node,const std::string& name,const std::string&
             node.style.mutable_textual().white_space =
                 value == "inherit" || value == "unset"
                 ? std::string{} : value;
+        } else if (name == "text-wrap") {
+            auto mode = ascii_lower(trim_value(value));
+            if (mode == "inherit" || mode == "unset") mode.clear();
+            else if (mode == "initial" || mode == "revert"
+                || mode == "revert-layer") mode = "wrap";
+            if (!mode.empty() && mode != "wrap" && mode != "nowrap") {
+                decision.classification = "invalid-authoring";
+            } else {
+                node.style.mutable_textual().text_wrap = std::move(mode);
+            }
         } else if (name == "word-break") {
             node.style.mutable_textual().word_break =
                 value == "inherit" || value == "unset"

experiments/WebScene.NativeEngine.Probe/native/webscene_native_dom.cpp

@@ -1025,6 +1025,7 @@ std::string resolved_text_transform(const dom_node& node, std::string value)
 
 bool resolved_white_space_wraps(const dom_node& node)
 {
+    if (resolved_text_wrap_mode(node) == "nowrap") return false;
     for (auto* current = &node; current != nullptr; current = current->parent) {
         if (current->style.textual().white_space.empty()) continue;
         return current->style.textual().white_space != "nowrap"