[WIP] Add target padding

src/config.rs

@@ -29,6 +29,17 @@ pub enum ThreadPadding {
     Off,
 }
 
+#[derive(Debug, Clone, Copy)]
+/// Padding to be used for logging the thread id/name
+pub enum TargetPadding {
+    /// Add spaces on the left side, up to usize many
+    Left(usize),
+    /// Add spaces on the right side, up to usize many
+    Right(usize),
+    /// Do not pad the thread id/name
+    Off,
+}
+
 #[derive(Debug, Clone, Copy, PartialEq)]
 /// Mode for logging the thread name or id or both.
 pub enum ThreadLogMode {
@@ -59,6 +70,7 @@ pub struct Config {
     pub(crate) thread_log_mode: ThreadLogMode,
     pub(crate) thread_padding: ThreadPadding,
     pub(crate) target: LevelFilter,
+    pub(crate) target_padding: TargetPadding,
     pub(crate) location: LevelFilter,
     pub(crate) time_format: Cow<'static, str>,
     pub(crate) time_offset: FixedOffset,
@@ -116,6 +128,12 @@ impl ConfigBuilder {
         self
     }
 
+    /// Set how the thread should be padded
+    pub fn set_target_padding(&mut self, padding: TargetPadding) -> &mut ConfigBuilder {
+        self.0.target_padding = padding;
+        self
+    }
+
     /// Set at which level and above (more verbose) a source code reference shall be logged (default is Trace)
     pub fn set_location_level(&mut self, location: LevelFilter) -> &mut ConfigBuilder {
         self.0.location = location;
@@ -256,6 +274,7 @@ impl Default for Config {
             thread_log_mode: ThreadLogMode::IDs,
             thread_padding: ThreadPadding::Off,
             target: LevelFilter::Debug,
+            target_padding: TargetPadding::Off,
             location: LevelFilter::Trace,
             time_format: Cow::Borrowed("%H:%M:%S"),
             time_offset: FixedOffset::east(0),

src/lib.rs

@@ -24,7 +24,9 @@
 mod config;
 mod loggers;
 
-pub use self::config::{Config, ConfigBuilder, LevelPadding, ThreadLogMode, ThreadPadding};
+pub use self::config::{
+    Config, ConfigBuilder, LevelPadding, TargetPadding, ThreadLogMode, ThreadPadding,
+};
 #[cfg(feature = "test")]
 pub use self::loggers::TestLogger;
 pub use self::loggers::{CombinedLogger, SimpleLogger, WriteLogger};

src/loggers/logging.rs

@@ -1,3 +1,4 @@
+use crate::config::TargetPadding;
 use crate::{Config, LevelPadding, ThreadLogMode, ThreadPadding};
 use log::{LevelFilter, Record};
 use std::io::{Error, Write};
@@ -32,7 +33,7 @@ where
     }
 
     if config.target <= record.level() && config.target != LevelFilter::Off {
-        write_target(record, write)?;
+        write_target(record, write, config)?;
     }
 
     if config.location <= record.level() && config.location != LevelFilter::Off {
@@ -71,11 +72,33 @@ where
 }
 
 #[inline(always)]
-pub fn write_target<W>(record: &Record<'_>, write: &mut W) -> Result<(), Error>
+pub fn write_target<W>(record: &Record<'_>, write: &mut W, config: &Config) -> Result<(), Error>
 where
     W: Write + Sized,
 {
-    write!(write, "{}: ", record.target())?;
+    // dbg!(&config.target_padding);
+    match config.target_padding {
+        TargetPadding::Left(pad) => {
+            write!(
+                write,
+                "{target:>pad$}: ",
+                pad = pad,
+                target = record.target()
+            )?;
+        }
+        TargetPadding::Right(pad) => {
+            write!(
+                write,
+                "{target:<pad$}: ",
+                pad = pad,
+                target = record.target()
+            )?;
+        }
+        TargetPadding::Off => {
+            write!(write, "{}: ", record.target())?;
+        }
+    }
+
     Ok(())
 }
 

src/loggers/termlog.rs

@@ -152,7 +152,7 @@ impl TermLogger {
         }
 
         if self.config.target <= record.level() && self.config.target != LevelFilter::Off {
-            write_target(record, term_lock)?;
+            write_target(record, term_lock, &self.config)?;
         }
 
         if self.config.location <= record.level() && self.config.location != LevelFilter::Off {