wip; toggle on click

Author: ynqa

promkit-widgets/src/structured/json/document.rs

@@ -27,12 +27,40 @@ impl Document {
         self.rows.extract(self.position, n)
     }
 
+    /// Returns the current visible row position.
+    pub fn position(&self) -> usize {
+        self.position
+    }
+
+    /// Resolves a visible row offset from the current position into the backing row index.
+    pub fn visible_offset_to_index(&self, offset: usize) -> Option<usize> {
+        if self.rows.is_empty() {
+            return None;
+        }
+
+        let mut index = self.position;
+        for _ in 0..offset {
+            let next = self.rows.down(index);
+            if next == index {
+                return None;
+            }
+            index = next;
+        }
+
+        Some(index)
+    }
+
     /// Toggles the visibility of a node at the cursor's current position.
     pub fn toggle(&mut self) {
         let index = self.rows.toggle(self.position);
         self.position = index;
     }
 
+    /// Sets the current position directly.
+    pub fn set_position(&mut self, position: usize) {
+        self.position = position.min(self.rows.len().saturating_sub(1));
+    }
+
     /// Sets the visibility of all rows.
     pub fn set_nodes_visibility(&mut self, collapsed: bool) {
         self.rows.set_rows_visibility(collapsed);

promkit/src/preset/json/evaluate.rs

@@ -78,6 +78,26 @@ pub async fn default(event: &Event, ctx: &mut Json) -> anyhow::Result<Signal> {
             ctx.json.document.toggle();
         }
 
+        Event::Mouse(MouseEvent {
+            kind: MouseEventKind::Down(_),
+            column,
+            row,
+            modifiers: KeyModifiers::NONE,
+        }) => {
+            if let Some(renderer) = ctx.renderer.as_ref() {
+                if let Some(hit) = renderer.hit_test(*row, *column).await {
+                    if hit.key == super::Index::Json {
+                        if let Some(index) =
+                            ctx.json.document.visible_offset_to_index(hit.visible_row)
+                        {
+                            ctx.json.document.set_position(index);
+                            ctx.json.document.toggle();
+                        }
+                    }
+                }
+            }
+        }
+
         _ => (),
     }
     Ok(Signal::Continue)