Add markdown table formatting

Author: marcelbuesing

examples/formatting.rs

@@ -41,6 +41,16 @@ fn main() {
     table.printstd();
     println!("");
 
+    // Print
+    // | Title 1     | Title 2    |
+    // |-------------|------------|
+    // | Value 1     | Value 2    |
+    // | Value three | Value four |
+    println!("FORMAT_MARKDOWN :");
+    table.set_format(*format::consts::FORMAT_MARKDOWN);
+    table.printstd();
+    println!("");
+
     // Custom format can be implemented using `prettytable::format::FormatBuilder`
     // Example to print
     // +-------------+------------+

src/format.rs

@@ -353,6 +353,9 @@ pub mod consts {
     use super::{TableFormat, LineSeparator, FormatBuilder, LinePosition};
 
     lazy_static! {
+
+        /// A line separator made of `-` and `|`
+        static ref MINUS_PIPE_SEP: LineSeparator = LineSeparator::new('-', '|', '|', '|');
         /// A line separator made of `-` and `+`
         static ref MINUS_PLUS_SEP: LineSeparator = LineSeparator::new('-', '+', '+', '+');
         /// A line separator made of `=` and `+`
@@ -555,5 +558,21 @@ pub mod consts {
                                                             '┘'))
                              .padding(1, 1)
                              .build();
+
+        /// A markdown table
+        ///
+        /// # Example
+        /// ```text
+        /// | Title 1     | Title 2    |
+        /// |-------------|------------|
+        /// | Value 1     | Value 2    |
+        /// | Value three | Value four |
+        /// ```
+        pub static ref FORMAT_MARKDOWN: TableFormat = FormatBuilder::new()
+                                                                    .padding(1, 1)
+                                                                    .borders('|')
+                                                                    .separator(LinePosition::Title, *MINUS_PIPE_SEP)
+                                                                    .column_separator('|')
+                                                                    .build();
     }
 }

src/lib.rs

@@ -975,6 +975,28 @@ mod tests {
         assert_eq!(6, table.print(&mut StringWriter::new()).unwrap());
     }
 
+    #[test]
+    fn test_markdown_format_with_title() {
+        let mut table = Table::new();
+        table.set_format(*format::consts::FORMAT_MARKDOWN);
+
+        table.set_titles(Row::new(vec![Cell::new("Title 1"), Cell::new("Title 2")]));
+        table.add_row(Row::new(vec![Cell::new("Value 1"), Cell::new("Value 2")]));
+        table.add_row(Row::new(vec![Cell::new("Value three"), Cell::new("Value four")]));
+
+        let out = "\
+| Title 1     | Title 2    |
+|-------------|------------|
+| Value 1     | Value 2    |
+| Value three | Value four |
+";
+        println!("{}", out);
+        println!("____");
+        println!("{}", table.to_string().replace("\r\n","\n"));
+        assert_eq!(out, table.to_string().replace("\r\n","\n"));
+        assert_eq!(4, table.print(&mut StringWriter::new()).unwrap());
+    }
+
     #[test]
     fn test_horizontal_span() {
         let mut table = Table::new();