Fix mapping system #115

crates/analyzer/src/lib.rs

@@ -93,12 +93,12 @@ fn clean_lsp_url(path: &std::path::Path) -> Option<Url> {
 }
 
 fn lsp_pos_to_rust_map(pos: &Position) -> RustMap {
-    RustMap(pos.line as usize + 1, pos.character as usize)
+    RustMap(pos.line as usize, pos.character as usize)
 }
 
 fn mist_map_to_lsp_pos(map: &MistMap) -> Position {
     Position {
-        line: map.0.saturating_sub(1) as u32,
+        line: map.0 as u32,
         character: map.1 as u32,
     }
 }
@@ -391,7 +391,7 @@ impl Backend {
                 // Fallback: the source has a syntax error that prevents transpilation.
                 // Use the last known working Rust content + mapping to inject the
                 // marker at the nearest valid Rust position.
-                let mist_target = MistMap(line as usize + 1, character as usize);
+                let mist_target = MistMap(line as usize, character as usize);
                 let mut rust_path = crate::from_mist_to_rust(mist_path.to_path_buf());
                 if mist_path.file_name().and_then(|n| n.to_str()) == Some("package.mist") {
                     rust_path.set_file_name("mod.rs");
@@ -417,7 +417,7 @@ impl Backend {
                     .map(|(rust, _)| *rust);
 
                 let (modified_rust, rust_pos) = if let Some(next_rust) = rust_next {
-                    let lsp_line = (next_rust.0 - 1) as u32;
+                    let lsp_line = next_rust.0 as u32;
                     let lsp_col = next_rust.1 as u32;
                     let modified = inject_marker_at(&last_content, lsp_line, lsp_col, &marker)?;
                     let pos = find_marker_position(&modified, &marker)?;
@@ -1869,7 +1869,7 @@ async fn handle_ra_notifications(
                                     character: if mist_end_pos.line == mist_start_pos.line {
                                         mist_end_pos.character.max(mist_start_pos.character + 1)
                                     } else {
-                                        mist_end_pos.character.max(1)
+                                        mist_end_pos.character.max(0)
                                     },
                                 };
 

crates/codegen/src/lib.rs

@@ -46,7 +46,7 @@ impl RustCodegen {
             indent: 0,
             crates: HashMap::new(),
             mapping: Mapping::new(mist_path),
-            position: RustMap(1, 0),
+            position: RustMap(0, 0),
         }
     }
 
@@ -186,7 +186,7 @@ impl<T> GenSpanTranslation for Spanned<T> {
     fn gen_span(&self, cg: &mut RustCodegen) {
         cg.mapping
             .map
-            .insert((cg.position, MistMap(self.line, self.column)));
+            .insert((cg.position, MistMap(self.line, self.column - 1)));
     }
 }
 

crates/mist-api/src/builder.mist

@@ -58,7 +58,9 @@ pub bool build(Vec<String> mut args, PathBuf root)
                             serde_json::from_str<rev_mapper::Mapping>(&map_str).expect("Failed to parse map file")
                         });
                         let mist_file = map.mist_path.strip_prefix(&root);
-                        let (_, rev_mapper::MistMap(line, column)) = map.find(&rev_mapper::RustMap(span.line_end, span.column_start)).unwrap_or_default();
+                        let rust_lookup = rev_mapper::RustMap(span.line_end - 1, span.column_start - 1);
+                        match map.find(&rust_lookup) {
+                            Some((_, rev_mapper::MistMap(line, column))) => {
                                 let mist_msg = MistDiagnosticMessage {
                                     message: format!("{}: {}",
                                         msg.message.message,
@@ -83,6 +85,12 @@ pub bool build(Vec<String> mut args, PathBuf root)
                                     }
                                 }
                             }
+                            None => {
+                                diagnostics.push(MistDiagnostic::Rust(msg));
+                                break;
+                            }
+                        }
+                    }
                 }
             }
             Ok(Message::BuildFinished(finish)) => {
@@ -110,8 +118,8 @@ pub void print_diagnostics(Vec<MistDiagnostic>& diagnostics)
                 let line = get_line(&mut files, &msg);
                 println!("\n{}:{}:{}\n \x1b[31mError\x1b[0m: {}\n\t{}",
                     msg.file_name,
-                    msg.line,
-                    msg.column,
+                    msg.line + 1,
+                    msg.column + 1,
                     msg.message,
                     line.unwrap_or_default(),)
             }
@@ -119,8 +127,8 @@ pub void print_diagnostics(Vec<MistDiagnostic>& diagnostics)
                 let line = get_line(&mut files, &msg);
                 println!("\n{}:{}:{}\n \x1b[33mWarning\x1b[0m: {}\n\t{}",
                     msg.file_name,
-                    msg.line,
-                    msg.column,
+                    msg.line + 1,
+                    msg.column + 1,
                     msg.message,
                     line.unwrap_or_default(),)
             }
@@ -135,5 +143,5 @@ pub Option<String> get_line(HashMap<PathBuf, Vec<String>> mut& files, MistDiagno
     let lines = files.entry(src_path.clone()).or_insert_with(() => {
         fs::read_to_string(src_path).expect("Unable to read mist file").lines().into_iter().map(String::from).collect()
     });
-    lines.get(msg.line - 1).map((v) => v.trim().to_string())
+    lines.get(msg.line).map((v) => v.trim().to_string())
 }

crates/parser/src/rev_mapper.rs

@@ -3,12 +3,12 @@ use std::{collections::HashSet, path::PathBuf};
 use serde::{Deserialize, Serialize};
 
 #[derive(
-    Debug, Default, Clone, Copy, Hash, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize,
+    Debug, Clone, Copy, Hash, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize,
 )]
 pub struct MistMap(pub usize, pub usize);
 
 #[derive(
-    Debug, Default, Clone, Copy, Hash, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize,
+    Debug, Clone, Copy, Hash, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize,
 )]
 pub struct RustMap(pub usize, pub usize);