refactor table system (#132)

* init table trait

* add shrink_col_index and max_width method to Table trait

* make unicodes work when shrinking

* improve readability of the table

* replace old table system with new one

* update changelog

src/mbox/model.rs

@@ -4,7 +4,7 @@ use std::fmt;
 
 use crate::{
     output::fmt::{get_output_fmt, OutputFmt, Response},
-    table::{self, DisplayRow, DisplayTable},
+    table::{Cell, Row, Table},
 };
 
 // Mbox
@@ -26,15 +26,25 @@ impl Mbox {
     }
 }
 
-impl DisplayRow for Mbox {
-    fn to_row(&self) -> Vec<table::Cell> {
-        use crate::table::*;
+impl Table for Mbox {
+    fn head() -> Row {
+        Row::new()
+            .cell(Cell::new("DELIM").bold().underline().white())
+            .cell(Cell::new("NAME").bold().underline().white())
+            .cell(
+                Cell::new("ATTRIBUTES")
+                    .shrinkable()
+                    .bold()
+                    .underline()
+                    .white(),
+            )
+    }
 
-        vec![
-            Cell::new(&[BLUE], &self.delim),
-            Cell::new(&[GREEN], &self.name),
-            FlexCell::new(&[YELLOW], &self.attributes.join(", ")),
-        ]
+    fn row(&self) -> Row {
+        Row::new()
+            .cell(Cell::new(&self.delim).red())
+            .cell(Cell::new(&self.name).green())
+            .cell(Cell::new(&self.attributes.join(", ")).shrinkable().yellow())
     }
 }
 
@@ -43,28 +53,12 @@ impl DisplayRow for Mbox {
 #[derive(Debug, Serialize)]
 pub struct Mboxes(pub Vec<Mbox>);
 
-impl<'a> DisplayTable<'a, Mbox> for Mboxes {
-    fn header_row() -> Vec<table::Cell> {
-        use crate::table::*;
-
-        vec![
-            Cell::new(&[BOLD, UNDERLINE, WHITE], "DELIM"),
-            Cell::new(&[BOLD, UNDERLINE, WHITE], "NAME"),
-            FlexCell::new(&[BOLD, UNDERLINE, WHITE], "ATTRIBUTES"),
-        ]
-    }
-
-    fn rows(&self) -> &Vec<Mbox> {
-        &self.0
-    }
-}
-
 impl fmt::Display for Mboxes {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         unsafe {
             match get_output_fmt() {
                 &OutputFmt::Plain => {
-                    writeln!(f, "\n{}", self.to_table())
+                    writeln!(f, "\n{}", Table::render(&self.0))
                 }
                 &OutputFmt::Json => {
                     let res = serde_json::to_string(&Response::new(self)).unwrap();