Fix empty line handling

CHANGELOG.md

@@ -7,15 +7,22 @@ The format is based on [Keep a Changelog], and this project adheres to
 
 ## [Unreleased]
 
+### Fixed
+
+- Empty lines are now correctly handled when computing template indentation.
+
 ## [0.4.1] - 2022-02-14
 
 ## [0.4.0] - 2022-02-10
 
 ### Changed
 
+- Block indentation width is now computed and adjusted according to the configuration.
+
+### Fixed
+
 - `indentTemplate` now works correctly when the content couldn't be
   formatted through dprint.
-- Block indentation width is now computed and adjusted according to the configuration.
 
 ## [0.3.2] - 2022-02-03
 

src/format.rs

@@ -72,7 +72,14 @@ fn format_block<'a>(
 
             let indent_width = pretty
                 .lines()
-                .map(|line| line.len() - line.trim_start().len())
+                .filter_map(|line| {
+                    let trimed_line = line.trim_start();
+                    if trimed_line.is_empty() {
+                        None
+                    } else {
+                        Some(line.len() - trimed_line.len())
+                    }
+                })
                 .min()
                 .unwrap_or(0);
 
@@ -178,12 +185,12 @@ mod test {
         assert_eq!(
             format(
                 Path::new("file.vue"),
-                "<template>\n  <div></div>\n  <div></div>\n</template>",
+                "<template>\n  <div></div>\n\n  <div></div>\n</template>",
                 &config,
                 |_, raw, _| Ok(raw)
             )
             .unwrap(),
-            "<template>\n  <div></div>\n  <div></div>\n</template>"
+            "<template>\n  <div></div>\n\n  <div></div>\n</template>"
         );
     }
 }