4 files changed, 37 insertions, 6 deletions
diff --git a/src/config/general/display_raw.rs b/src/config/general/display_raw.rs
index c594e5c..84836f6 100644
--- a/src/config/general/display_raw.rs
+++ b/src/config/general/display_raw.rs
@@ -3,7 +3,9 @@ use std::convert::From;
 use serde_derive::Deserialize;
 use tui::layout::Constraint;
 
-use crate::config::option::{DisplayMode, DisplayOption, LineNumberStyle, TabDisplayOption};
+use crate::config::option::{
+    DisplayMode, DisplayOption, LineMode, LineNumberStyle, TabDisplayOption,
+};
 
 use super::sort_raw::SortOptionRaw;
 
@@ -124,8 +126,10 @@ impl From<DisplayOptionRaw> for DisplayOption {
             default_layout,
             no_preview_layout,
             default_tab_display_option: TabDisplayOption {
-                _sort_options: raw.sort_options.into(),
                 filter_string: "".to_owned(),
+                sort_options: raw.sort_options.into(),
+                // todo: make default line mode configurable
+                linemode: LineMode::Size,
             },
         }
     }
diff --git a/src/config/option/display_option.rs b/src/config/option/display_option.rs
index a076db8..e213236 100644
--- a/src/config/option/display_option.rs
+++ b/src/config/option/display_option.rs
@@ -2,6 +2,7 @@ use std::fs;
 
 use tui::layout::Constraint;
 
+use crate::config::option::LineMode;
 use crate::config::option::SortOption;
 
 #[derive(Clone, Copy, Debug)]
@@ -35,8 +36,9 @@ pub struct DisplayOption {
 /// Display options valid per JoshutoTab
 #[derive(Clone, Debug)]
 pub struct TabDisplayOption {
-    pub _sort_options: SortOption,
     pub filter_string: String,
+    pub sort_options: SortOption,
+    pub linemode: LineMode,
 }
 
 #[derive(Clone, Copy, Debug)]
@@ -48,11 +50,11 @@ pub enum LineNumberStyle {
 
 impl TabDisplayOption {
     pub fn sort_options_ref(&self) -> &SortOption {
-        &self._sort_options
+        &self.sort_options
     }
 
     pub fn sort_options_mut(&mut self) -> &mut SortOption {
-        &mut self._sort_options
+        &mut self.sort_options
     }
 
     pub fn set_filter_string(&mut self, pattern: &str) {
@@ -146,8 +148,9 @@ impl std::default::Default for DisplayOption {
             default_layout,
             no_preview_layout,
             default_tab_display_option: TabDisplayOption {
-                _sort_options: SortOption::default(),
                 filter_string: "".to_owned(),
+                sort_options: SortOption::default(),
+                linemode: LineMode::Size,
             },
         }
     }
diff --git a/src/config/option/linemodes.rs b/src/config/option/linemodes.rs
new file mode 100644
index 0000000..405bb6b
--- /dev/null
+++ b/src/config/option/linemodes.rs
@@ -0,0 +1,22 @@
+use crate::error::{JoshutoError, JoshutoErrorKind, JoshutoResult};
+
+#[derive(Clone, Debug, Copy)]
+pub enum LineMode {
+    Size,
+    MTime,
+    SizeMTime,
+}
+
+impl LineMode {
+    pub fn from_string(name: &str) -> JoshutoResult<LineMode> {
+        match name {
+            "size" => Ok(LineMode::Size),
+            "mtime" => Ok(LineMode::MTime),
+            "sizemtime" => Ok(LineMode::SizeMTime),
+            _ => Err(JoshutoError::new(
+                JoshutoErrorKind::InvalidParameters,
+                format!("Linemode '{}' unknown.", name),
+            )),
+        }
+    }
+}
diff --git a/src/config/option/mod.rs b/src/config/option/mod.rs
index a81bd06..cf90f1b 100644
--- a/src/config/option/mod.rs
+++ b/src/config/option/mod.rs
@@ -1,4 +1,5 @@
 pub mod display_option;
+pub mod linemodes;
 pub mod preview_option;
 pub mod select_option;
 pub mod sort_option;
@@ -6,6 +7,7 @@ pub mod sort_type;
 pub mod tab_option;
 
 pub use self::display_option::*;
+pub use self::linemodes::*;
 pub use self::preview_option::*;
 pub use self::select_option::*;
 pub use self::sort_option::*;