project_panel: Add auto_open settings (#40435)

- Based on #40234, and improvement of #40331

Release Notes:

- Added granular settings to control when files auto-open in the project
panel (project_panel.auto_open.on_create, on_paste, on_drop)

<img width="662" height="367" alt="Screenshot_2025-10-16_17-28-31"
src="https://github.com/user-attachments/assets/930a0a50-fc89-4c5d-8d05-b1fa2279de8b"
/>

---------

Co-authored-by: Smit Barmase <heysmitbarmase@gmail.com>

crates/migrator/src/migrations.rs

@@ -135,3 +135,9 @@ pub(crate) mod m_2025_10_21 {
 
     pub(crate) use settings::make_relative_line_numbers_an_enum;
 }
+
+pub(crate) mod m_2025_11_12 {
+    mod settings;
+
+    pub(crate) use settings::SETTINGS_PATTERNS;
+}

crates/migrator/src/migrations/m_2025_11_12/settings.rs

@@ -0,0 +1,84 @@
+use std::ops::Range;
+use tree_sitter::{Query, QueryMatch};
+
+use crate::MigrationPatterns;
+use crate::patterns::SETTINGS_NESTED_KEY_VALUE_PATTERN;
+
+pub const SETTINGS_PATTERNS: MigrationPatterns = &[
+    (
+        SETTINGS_NESTED_KEY_VALUE_PATTERN,
+        rename_open_file_on_paste_setting,
+    ),
+    (
+        SETTINGS_NESTED_KEY_VALUE_PATTERN,
+        replace_open_file_on_paste_setting_value,
+    ),
+];
+
+fn rename_open_file_on_paste_setting(
+    contents: &str,
+    mat: &QueryMatch,
+    query: &Query,
+) -> Option<(Range<usize>, String)> {
+    if !is_project_panel_open_file_on_paste(contents, mat, query) {
+        return None;
+    }
+
+    let setting_name_ix = query.capture_index_for_name("setting_name")?;
+    let setting_name_range = mat
+        .nodes_for_capture_index(setting_name_ix)
+        .next()?
+        .byte_range();
+
+    Some((setting_name_range, "auto_open".to_string()))
+}
+
+fn replace_open_file_on_paste_setting_value(
+    contents: &str,
+    mat: &QueryMatch,
+    query: &Query,
+) -> Option<(Range<usize>, String)> {
+    if !is_project_panel_open_file_on_paste(contents, mat, query) {
+        return None;
+    }
+
+    let value_ix = query.capture_index_for_name("setting_value")?;
+    let value_node = mat.nodes_for_capture_index(value_ix).next()?;
+    let value_range = value_node.byte_range();
+    let value_text = contents.get(value_range.clone())?.trim();
+
+    let normalized_value = match value_text {
+        "true" => "true",
+        "false" => "false",
+        _ => return None,
+    };
+
+    Some((
+        value_range,
+        format!("{{ \"on_paste\": {normalized_value} }}"),
+    ))
+}
+
+fn is_project_panel_open_file_on_paste(contents: &str, mat: &QueryMatch, query: &Query) -> bool {
+    let parent_key_ix = match query.capture_index_for_name("parent_key") {
+        Some(ix) => ix,
+        None => return false,
+    };
+    let parent_range = match mat.nodes_for_capture_index(parent_key_ix).next() {
+        Some(node) => node.byte_range(),
+        None => return false,
+    };
+    if contents.get(parent_range) != Some("project_panel") {
+        return false;
+    }
+
+    let setting_name_ix = match query.capture_index_for_name("setting_name") {
+        Some(ix) => ix,
+        None => return false,
+    };
+    let setting_name_range = match mat.nodes_for_capture_index(setting_name_ix).next() {
+        Some(node) => node.byte_range(),
+        None => return false,
+    };
+    contents.get(setting_name_range) == Some("open_file_on_paste")
+}

crates/migrator/src/migrator.rs

@@ -215,6 +215,10 @@ pub fn migrate_settings(text: &str) -> Result<Option<String>> {
         MigrationType::Json(migrations::m_2025_10_16::restore_code_actions_on_format),
         MigrationType::Json(migrations::m_2025_10_17::make_file_finder_include_ignored_an_enum),
         MigrationType::Json(migrations::m_2025_10_21::make_relative_line_numbers_an_enum),
+        MigrationType::TreeSitter(
+            migrations::m_2025_11_12::SETTINGS_PATTERNS,
+            &SETTINGS_QUERY_2025_11_12,
+        ),
     ];
     run_migrations(text, migrations)
 }
@@ -333,6 +337,10 @@ define_query!(
     SETTINGS_QUERY_2025_10_03,
     migrations::m_2025_10_03::SETTINGS_PATTERNS
 );
+define_query!(
+    SETTINGS_QUERY_2025_11_12,
+    migrations::m_2025_11_12::SETTINGS_PATTERNS
+);
 
 // custom query
 static EDIT_PREDICTION_SETTINGS_MIGRATION_QUERY: LazyLock<Query> = LazyLock::new(|| {
@@ -2193,4 +2201,49 @@ mod tests {
             ),
         );
     }
+
+    #[test]
+    fn test_project_panel_open_file_on_paste_migration() {
+        assert_migrate_settings(
+            &r#"
+            {
+                "project_panel": {
+                    "open_file_on_paste": true
+                }
+            }
+            "#
+            .unindent(),
+            Some(
+                &r#"
+                {
+                    "project_panel": {
+                        "auto_open": { "on_paste": true }
+                    }
+                }
+                "#
+                .unindent(),
+            ),
+        );
+
+        assert_migrate_settings(
+            &r#"
+            {
+                "project_panel": {
+                    "open_file_on_paste": false
+                }
+            }
+            "#
+            .unindent(),
+            Some(
+                &r#"
+                {
+                    "project_panel": {
+                        "auto_open": { "on_paste": false }
+                    }
+                }
+                "#
+                .unindent(),
+            ),
+        );
+    }
 }