use hir::db::HirDatabase; use ra_syntax::{ ast::{self, NameOwner, VisibilityOwner}, AstNode, SyntaxKind::{ ATTR, COMMENT, ENUM_DEF, FN_DEF, IDENT, MODULE, STRUCT_DEF, TRAIT_DEF, VISIBILITY, WHITESPACE, }, SyntaxNode, TextUnit, T, }; use crate::{Assist, AssistCtx, AssistId}; // Assist: change_visibility // // Adds or changes existing visibility specifier. // // ``` // <|>fn frobnicate() {} // ``` // -> // ``` // pub(crate) fn frobnicate() {} // ``` pub(crate) fn change_visibility(ctx: AssistCtx) -> Option { if let Some(vis) = ctx.find_node_at_offset::() { return change_vis(ctx, vis); } add_vis(ctx) } fn add_vis(ctx: AssistCtx) -> Option { let item_keyword = ctx.token_at_offset().find(|leaf| match leaf.kind() { T![fn] | T![mod] | T![struct] | T![enum] | T![trait] => true, _ => false, }); let (offset, target) = if let Some(keyword) = item_keyword { let parent = keyword.parent(); let def_kws = vec![FN_DEF, MODULE, STRUCT_DEF, ENUM_DEF, TRAIT_DEF]; // Parent is not a definition, can't add visibility if !def_kws.iter().any(|&def_kw| def_kw == parent.kind()) { return None; } // Already have visibility, do nothing if parent.children().any(|child| child.kind() == VISIBILITY) { return None; } (vis_offset(&parent), keyword.text_range()) } else { let ident = ctx.token_at_offset().find(|leaf| leaf.kind() == IDENT)?; let field = ident.parent().ancestors().find_map(ast::RecordFieldDef::cast)?; if field.name()?.syntax().text_range() != ident.text_range() && field.visibility().is_some() { return None; } (vis_offset(field.syntax()), ident.text_range()) }; ctx.add_assist(AssistId("change_visibility"), "Change visibility to pub(crate)", |edit| { edit.target(target); edit.insert(offset, "pub(crate) "); edit.set_cursor(offset); }) } fn vis_offset(node: &SyntaxNode) -> TextUnit { node.children_with_tokens() .skip_while(|it| match it.kind() { WHITESPACE | COMMENT | ATTR => true, _ => false, }) .next() .map(|it| it.text_range().start()) .unwrap_or_else(|| node.text_range().start()) } fn change_vis(ctx: AssistCtx, vis: ast::Visibility) -> Option { if vis.syntax().text() == "pub" { return ctx.add_assist( AssistId("change_visibility"), "Change Visibility to pub(crate)", |edit| { edit.target(vis.syntax().text_range()); edit.replace(vis.syntax().text_range(), "pub(crate)"); edit.set_cursor(vis.syntax().text_range().start()) }, ); } if vis.syntax().text() == "pub(crate)" { return ctx.add_assist(AssistId("change_visibility"), "Change visibility to pub", |edit| { edit.target(vis.syntax().text_range()); edit.replace(vis.syntax().text_range(), "pub"); edit.set_cursor(vis.syntax().text_range().start()); }); } None } #[cfg(test)] mod tests { use super::*; use crate::helpers::{check_assist, check_assist_target}; #[test] fn change_visibility_adds_pub_crate_to_items() { check_assist(change_visibility, "<|>fn foo() {}", "<|>pub(crate) fn foo() {}"); check_assist(change_visibility, "f<|>n foo() {}", "<|>pub(crate) fn foo() {}"); check_assist(change_visibility, "<|>struct Foo {}", "<|>pub(crate) struct Foo {}"); check_assist(change_visibility, "<|>mod foo {}", "<|>pub(crate) mod foo {}"); check_assist(change_visibility, "<|>trait Foo {}", "<|>pub(crate) trait Foo {}"); check_assist(change_visibility, "m<|>od {}", "<|>pub(crate) mod {}"); check_assist( change_visibility, "unsafe f<|>n foo() {}", "<|>pub(crate) unsafe fn foo() {}", ); } #[test] fn change_visibility_works_with_struct_fields() { check_assist( change_visibility, "struct S { <|>field: u32 }", "struct S { <|>pub(crate) field: u32 }", ) } #[test] fn change_visibility_pub_to_pub_crate() { check_assist(change_visibility, "<|>pub fn foo() {}", "<|>pub(crate) fn foo() {}") } #[test] fn change_visibility_pub_crate_to_pub() { check_assist(change_visibility, "<|>pub(crate) fn foo() {}", "<|>pub fn foo() {}") } #[test] fn change_visibility_handles_comment_attrs() { check_assist( change_visibility, " /// docs // comments #[derive(Debug)] <|>struct Foo; ", " /// docs // comments #[derive(Debug)] <|>pub(crate) struct Foo; ", ) } #[test] fn change_visibility_target() { check_assist_target(change_visibility, "<|>fn foo() {}", "fn"); check_assist_target(change_visibility, "pub(crate)<|> fn foo() {}", "pub(crate)"); check_assist_target(change_visibility, "struct S { <|>field: u32 }", "field"); } }