merged previous stuffs on master

crates/ui/src/index_path.rs

@@ -0,0 +1,69 @@
+use std::fmt::{Debug, Display};
+
+use gpui::ElementId;
+
+/// Represents an index path in a list, which consists of a section index,
+///
+/// The default values for section, row, and column are all set to 0.
+#[derive(Debug, Clone, Copy, Default, PartialEq, Eq)]
+pub struct IndexPath {
+    /// The section index.
+    pub section: usize,
+    /// The item index in the section.
+    pub row: usize,
+    /// The column index.
+    pub column: usize,
+}
+
+impl From<IndexPath> for ElementId {
+    fn from(path: IndexPath) -> Self {
+        ElementId::Name(format!("index-path({},{},{})", path.section, path.row, path.column).into())
+    }
+}
+
+impl Display for IndexPath {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(
+            f,
+            "IndexPath(section: {}, row: {}, column: {})",
+            self.section, self.row, self.column
+        )
+    }
+}
+
+impl IndexPath {
+    /// Create a new index path with the specified section and row.
+    ///
+    /// The `section` is set to 0 by default.
+    /// The `column` is set to 0 by default.
+    pub fn new(row: usize) -> Self {
+        IndexPath {
+            section: 0,
+            row,
+            ..Default::default()
+        }
+    }
+
+    /// Set the section for the index path.
+    pub fn section(mut self, section: usize) -> Self {
+        self.section = section;
+        self
+    }
+
+    /// Set the row for the index path.
+    pub fn row(mut self, row: usize) -> Self {
+        self.row = row;
+        self
+    }
+
+    /// Set the column for the index path.
+    pub fn column(mut self, column: usize) -> Self {
+        self.column = column;
+        self
+    }
+
+    /// Check if the self is equal to the given index path (Same section and row).
+    pub fn eq_row(&self, index: IndexPath) -> bool {
+        self.section == index.section && self.row == index.row
+    }
+}