allow syntax highlighting to be enabled or disabled

1 files changed, 38 insertions, 11 deletions

diff --git a/src/run/builtin.rs b/src/run/builtin.rs
index 2255997..dfafcbe 100644
--- a/src/run/builtin.rs
+++ b/src/run/builtin.rs
@@ -982,28 +982,55 @@ impl Builtin for pish_theme {
         _stdin: &mut dyn Read,
         stdout: &mut dyn Write,
     ) -> Result {
-        if args.len() != 2 {
-            stdout.write_all(b"usage: pish_theme <kind> <color>\nwhere color is an ansi escape code,\nand where kind is one of the following: ")?;
+        let mut usage = || {
+            stdout.write_all(b"usage:\n")?;
+            stdout.write_all(b"pish_theme disable\n")?;
+            stdout.write_all(b"pish_theme enable\n")?;
+            stdout.write_all(b"pish_theme set <kind> <color>\nwhere color is an ansi escape code,\nand where kind is one of the following: ")?;
             for ident in crate::parse::HighlightKind::all_identifiers() {
                 stdout.write_all(&ident)?;
                 stdout.write_all(b" ")?;
             }
             stdout.write_all(b"\n")?;
             return Err(Error::Exit(-1));
+        };
+
+        if args.is_empty() {
+            return usage();
         }
 
         let mut se = session.lock().unwrap();
-        match se.highlighter.set_color(&args[0], &args[1]) {
-            Ok(_) => Ok(()),
-            Err(e) => match e {
-                syntax_highlighting::SetColorError::NoSuchKeyword => {
-                    stdout.write_all(b"no such kind: ")?;
-                    stdout.write_all(&args[0])?;
-                    stdout.write_all(b"\n")?;
-                    Err(Error::Exit(-1))
+
+        match &args[0][..] {
+            b"disable" => {
+                se.highlighter.enabled = false;
+            }
+            b"enable" => {
+                se.highlighter.enabled = true;
+            }
+            b"set" => {
+                if args.len() != 3 {
+                    return usage();
                 }
-            },
+
+                let kind = &args[1][..];
+                let color = &args[2][..];
+
+                if let Err(e) = se.highlighter.set_color(kind, color) {
+                    match e {
+                        syntax_highlighting::SetColorError::NoSuchKeyword => {
+                            stdout.write_all(b"no such kind: ")?;
+                            stdout.write_all(&args[0])?;
+                            stdout.write_all(b"\n")?;
+                            return Err(Error::Exit(-1));
+                        }
+                    }
+                }
+            }
+            _ => return usage(),
         }
+
+        Ok(())
     }
 }