From 5233766ce51d7593bb02d041bd63fa3aad44f666 Mon Sep 17 00:00:00 2001 From: Aleksey Kladov Date: Tue, 9 Jun 2020 11:33:28 +0200 Subject: Simplify unwrapping of blocks --- crates/ra_assists/src/handlers/unwrap_block.rs | 128 ++++++++++--------------- 1 file changed, 49 insertions(+), 79 deletions(-) (limited to 'crates') diff --git a/crates/ra_assists/src/handlers/unwrap_block.rs b/crates/ra_assists/src/handlers/unwrap_block.rs index 8440c7d0f..c48ecaae8 100644 --- a/crates/ra_assists/src/handlers/unwrap_block.rs +++ b/crates/ra_assists/src/handlers/unwrap_block.rs @@ -1,8 +1,5 @@ use ra_fmt::unwrap_trivial_block; -use ra_syntax::{ - ast::{self, ElseBranch, Expr, LoopBodyOwner}, - match_ast, AstNode, TextRange, T, -}; +use ra_syntax::{ast, AstNode, TextRange, T}; use crate::{AssistContext, AssistId, Assists}; @@ -29,89 +26,62 @@ pub(crate) fn unwrap_block(acc: &mut Assists, ctx: &AssistContext) -> Option<()> let parent = block.syntax().parent()?; let assist_id = AssistId("unwrap_block"); let assist_label = "Unwrap block"; - - let (expr, expr_to_unwrap) = match_ast! { - match parent { - ast::ForExpr(for_expr) => { - let block_expr = for_expr.loop_body()?; - let expr_to_unwrap = extract_expr(ctx.frange.range, block_expr)?; - (ast::Expr::ForExpr(for_expr), expr_to_unwrap) - }, - ast::WhileExpr(while_expr) => { - let block_expr = while_expr.loop_body()?; - let expr_to_unwrap = extract_expr(ctx.frange.range, block_expr)?; - (ast::Expr::WhileExpr(while_expr), expr_to_unwrap) - }, - ast::LoopExpr(loop_expr) => { - let block_expr = loop_expr.loop_body()?; - let expr_to_unwrap = extract_expr(ctx.frange.range, block_expr)?; - (ast::Expr::LoopExpr(loop_expr), expr_to_unwrap) - }, - ast::IfExpr(if_expr) => { - let mut resp = None; - - let then_branch = if_expr.then_branch()?; - if then_branch.l_curly_token()?.text_range().contains_range(ctx.frange.range) { - if let Some(ancestor) = if_expr.syntax().parent().and_then(ast::IfExpr::cast) { - // For `else if` blocks - let ancestor_then_branch = ancestor.then_branch()?; - let l_curly_token = then_branch.l_curly_token()?; - - let target = then_branch.syntax().text_range(); - return acc.add(assist_id, assist_label, target, |edit| { - let range_to_del_else_if = TextRange::new(ancestor_then_branch.syntax().text_range().end(), l_curly_token.text_range().start()); - let range_to_del_rest = TextRange::new(then_branch.syntax().text_range().end(), if_expr.syntax().text_range().end()); - - edit.delete(range_to_del_rest); - edit.delete(range_to_del_else_if); - edit.replace(target, update_expr_string(then_branch.to_string(), &[' ', '{'])); - }); - } else { - resp = Some((ast::Expr::IfExpr(if_expr.clone()), Expr::BlockExpr(then_branch))); - } - } else if let Some(else_branch) = if_expr.else_branch() { - match else_branch { - ElseBranch::Block(else_block) => { - let l_curly_token = else_block.l_curly_token()?; - if l_curly_token.text_range().contains_range(ctx.frange.range) { - let target = else_block.syntax().text_range(); - return acc.add(assist_id, assist_label, target, |edit| { - let range_to_del = TextRange::new(then_branch.syntax().text_range().end(), l_curly_token.text_range().start()); - - edit.delete(range_to_del); - edit.replace(target, update_expr_string(else_block.to_string(), &[' ', '{'])); - }); - } - }, - ElseBranch::IfExpr(_) => {}, - } + let parent = ast::Expr::cast(parent)?; + + match parent.clone() { + ast::Expr::ForExpr(_) | ast::Expr::WhileExpr(_) | ast::Expr::LoopExpr(_) => (), + ast::Expr::IfExpr(if_expr) => { + let then_branch = if_expr.then_branch()?; + if then_branch == block { + if let Some(ancestor) = if_expr.syntax().parent().and_then(ast::IfExpr::cast) { + // For `else if` blocks + let ancestor_then_branch = ancestor.then_branch()?; + + let target = then_branch.syntax().text_range(); + return acc.add(assist_id, assist_label, target, |edit| { + let range_to_del_else_if = TextRange::new( + ancestor_then_branch.syntax().text_range().end(), + l_curly_token.text_range().start(), + ); + let range_to_del_rest = TextRange::new( + then_branch.syntax().text_range().end(), + if_expr.syntax().text_range().end(), + ); + + edit.delete(range_to_del_rest); + edit.delete(range_to_del_else_if); + edit.replace( + target, + update_expr_string(then_branch.to_string(), &[' ', '{']), + ); + }); } - - resp? - }, - _ => return None, + } else { + let target = block.syntax().text_range(); + return acc.add(assist_id, assist_label, target, |edit| { + let range_to_del = TextRange::new( + then_branch.syntax().text_range().end(), + l_curly_token.text_range().start(), + ); + + edit.delete(range_to_del); + edit.replace(target, update_expr_string(block.to_string(), &[' ', '{'])); + }); + } } + _ => return None, }; - let target = expr_to_unwrap.syntax().text_range(); - acc.add(assist_id, assist_label, target, |edit| { - edit.replace( - expr.syntax().text_range(), - update_expr_string(expr_to_unwrap.to_string(), &[' ', '{', '\n']), + let unwrapped = unwrap_trivial_block(block); + let target = unwrapped.syntax().text_range(); + acc.add(assist_id, assist_label, target, |builder| { + builder.replace( + parent.syntax().text_range(), + update_expr_string(unwrapped.to_string(), &[' ', '{', '\n']), ); }) } -fn extract_expr(cursor_range: TextRange, block: ast::BlockExpr) -> Option { - let cursor_in_range = block.l_curly_token()?.text_range().contains_range(cursor_range); - - if cursor_in_range { - Some(unwrap_trivial_block(block)) - } else { - None - } -} - fn update_expr_string(expr_str: String, trim_start_pat: &[char]) -> String { let expr_string = expr_str.trim_start_matches(trim_start_pat); let mut expr_string_lines: Vec<&str> = expr_string.lines().collect(); -- cgit v1.2.3