feat: Support for BorderChar on Table level

README.md

@@ -419,6 +419,30 @@ But rather necessary to set a custom char.
 
 You can use `BorderChar` to achieve this.
 
+```rust
+use tabled::{
+    style::{BorderChar, Offset, Style},
+    Table,
+};
+
+fn main() {
+    let table = Table::new([["Hello", "World", "!"]])
+        .with(Style::markdown())
+        .with(BorderChar::horizontal(':', Offset::Begin(0)))
+        .with(BorderChar::horizontal(':', Offset::End(0)))
+        .to_string();
+
+    assert_eq!(
+        table,
+        "| 0     | 1     | 2 |\n\
+         |:-----:|:-----:|:-:|\n\
+         | Hello | World | ! |"
+    );
+}
+```
+
+Or if you want a specific cell, you can modify `Column`/`Row`.
+
 ```rust
 use tabled::{
     object::Columns,
@@ -430,7 +454,7 @@ fn main() {
     let table = Table::new([["Hello", "World", "!"]])
         .with(Style::markdown())
         .with(
-            Modify::new(Columns::new(..))
+            Modify::new(Columns::single(1))
                 .with(BorderChar::horizontal(':', Offset::Begin(0)))
                 .with(BorderChar::horizontal(':', Offset::End(0))),
         )
@@ -439,7 +463,7 @@ fn main() {
     assert_eq!(
         table,
         "| 0     | 1     | 2 |\n\
-         |:-----:|:-----:|:-:|\n\
+         |-------|:-----:|---|\n\
          | Hello | World | ! |"
     );
 }

src/features/style/border_char.rs

@@ -1,6 +1,6 @@
 use papergrid::records::Records;
 
-use crate::{style::Offset, CellOption, Table};
+use crate::{style::Offset, CellOption, Table, TableOption};
 
 /// [`BorderChar`] sets a char to a specific location on a horizontal line.
 ///
@@ -76,3 +76,32 @@ where
         }
     }
 }
+
+
+impl<R> TableOption<R> for BorderChar
+where
+        R: Records,
+{
+    fn change(&mut self, table: &mut Table<R>) {
+        let offset = self.offset.into();
+        let (count_rows, count_cols) = table.shape();
+
+        for row in 0..count_rows {
+            for col in 0..count_cols {
+                let pos = (row, col).into();
+                match self.horizontal {
+                    true => {
+                        table
+                            .get_config_mut()
+                            .override_horizontal_border(pos, self.c, offset);
+                    }
+                    false => {
+                        table
+                            .get_config_mut()
+                            .override_vertical_border(pos, self.c, offset);
+                    }
+                }
+            }
+        }
+    }
+}

tests/style_test.rs

@@ -2480,6 +2480,31 @@ test_table!(
     "y     2     y    2-0    y    2-1    y    2-2    y"
 );
 
+test_table!(
+    override_horizontal_border_char_on_table,
+    create_table::<3, 3>()
+        .with(Style::markdown())
+        .with(BorderChar::horizontal(':', Offset::Begin(0)))
+        .with(BorderChar::horizontal(':', Offset::End(0))),
+    "| N | column 0 | column 1 | column 2 |"
+    "|:-:|:--------:|:--------:|:--------:|"
+    "| 0 |   0-0    |   0-1    |   0-2    |"
+    "| 1 |   1-0    |   1-1    |   1-2    |"
+    "| 2 |   2-0    |   2-1    |   2-2    |"
+);
+
+test_table!(
+    override_vertical_border_char_on_table,
+    create_table::<3, 3>()
+        .with(Style::markdown())
+        .with(BorderChar::vertical(':', Offset::Begin(0))),
+    ": N : column 0 : column 1 : column 2 |"
+    "|---|----------|----------|----------|"
+    ": 0 :   0-0    :   0-1    :   0-2    |"
+    ": 1 :   1-0    :   1-1    :   1-2    |"
+    ": 2 :   2-0    :   2-1    :   2-2    |"
+);
+
 test_table!(
     table_format_alignment_left_test,
     format!("{:<}", Table::new(vec!["hello", "world", "!"])),