feat: continue tree rust family cutover

- add rust renderer/state-family scaffolds and inline compat host thinning for page tree, file tree, and picker - route tree/filetree preflight, file projection, resource artifact, and stream delta contracts through rust plans - preserve canonical move-order validation, file-tree search projection, and related frontend/runtime regression coverage
2026-04-26 19:35:52 +08:00
parent 338bb2e20f
commit e564dfde02
93 changed files with 17492 additions and 1856 deletions
@@ -0,0 +1,63 @@
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum TreeShellDragEffect {
+    Copy,
+    Move,
+    None,
+}
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct TreeShellDragPayload {
+    pub row_ids: Vec<String>,
+}
+
+#[derive(Debug, Clone, PartialEq, Eq, Default)]
+pub struct TreeShellDropTarget {
+    pub row_id: Option<String>,
+    pub document_id: Option<String>,
+    pub asset_id: Option<String>,
+}
+
+pub fn resolve_drag_effect(has_external_files: bool, alt_key: bool) -> TreeShellDragEffect {
+    if has_external_files || alt_key {
+        TreeShellDragEffect::Copy
+    } else {
+        TreeShellDragEffect::Move
+    }
+}
+
+pub fn normalize_drag_payload(row_ids: &[String]) -> Option<TreeShellDragPayload> {
+    let mut normalized = Vec::new();
+    for row_id in row_ids {
+        let row_id = row_id.trim();
+        if row_id.is_empty() || normalized.iter().any(|existing| existing == row_id) {
+            continue;
+        }
+        normalized.push(row_id.to_string());
+    }
+    if normalized.is_empty() {
+        None
+    } else {
+        Some(TreeShellDragPayload {
+            row_ids: normalized,
+        })
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::{normalize_drag_payload, resolve_drag_effect, TreeShellDragEffect};
+
+    fn ids(values: &[&str]) -> Vec<String> {
+        values.iter().map(|value| (*value).to_string()).collect()
+    }
+
+    #[test]
+    fn tree_shell_drag_drop_state_normalizes_payload_and_effect() {
+        let payload = normalize_drag_payload(&ids(&[" doc:a ", "asset:b", "doc:a", ""])).unwrap();
+        assert_eq!(payload.row_ids, ids(&["doc:a", "asset:b"]));
+        assert_eq!(resolve_drag_effect(true, false), TreeShellDragEffect::Copy);
+        assert_eq!(resolve_drag_effect(false, true), TreeShellDragEffect::Copy);
+        assert_eq!(resolve_drag_effect(false, false), TreeShellDragEffect::Move);
+        assert!(normalize_drag_payload(&ids(&["", " "])).is_none());
+    }
+}