Added a few more commands and arguments

src/command/mod.rs

@@ -16,6 +16,7 @@ pub fn is_command(
 		| "vars"
 		| "consts" | "constants"
 		| "del" | "delete"
+		| "flags"
 		=> true,
 		_ => false
 	}
@@ -81,6 +82,27 @@ pub fn do_command(
 			return t;
 		},
 
+		"flags" => {
+			return FormattedText::new(
+				concat!(
+					"\n",
+					"A list of command-line arguments is below\n",
+					"\n",
+					"╞════ [t]Flag[n] ════╪════════════════ [t]Function[n] ════════════════╡\n",
+					"  [c]--help[n]        Show help\n",
+					"  [c]--version[n]     Show version\n",
+					"  [c]--info[n]        Show system information\n",
+					"  [c]--256color[n]    Use full color support (default)\n",
+					"  [c]--8color[n]      Use reduced colors (ANSI, no styling)\n",
+					"  [c]--nocolor[n]     Do not use colors\n",
+					"  [c]--nosub[n]       Disable inline substitution\n",
+					"  [c]--nosuper[n]     Disable superscript powers\n",
+					"  [c]--nooneover[n]   Disable \"one-over\" fractions as -1 power\n",
+					"\n\n"
+				).to_string()
+			);
+		},
+
 		"clear" => {
 			return FormattedText::new("[clear]".to_string());
 		},

src/main.rs

@@ -29,7 +29,9 @@ pub fn main() -> Result<(), std::io::Error> {
 	let mut pb: PromptBuffer = PromptBuffer::new(64);
 	let mut context = Context::new();
 
-	// Set color compatibilty
+	// Detect color compatibilty
+	// Currently unused, this is slow.
+	/*
 	let term_colors = stdout.available_colors().unwrap_or(0);
 	if term_colors >= 256 {
 		context.config.term_color_type = 2;
@@ -38,9 +40,7 @@ pub fn main() -> Result<(), std::io::Error> {
 	} else {
 		context.config.term_color_type = 0;
 	}
-
-	context.config.check();
-
+	*/
 
 
 	// Handle command-line arguments
@@ -48,6 +48,8 @@ pub fn main() -> Result<(), std::io::Error> {
 	if args.iter().any(|s| s == "--help") {
 		let t = command::do_command(&mut context, &String::from("help"));
 		t.write(&context, &mut stdout)?;
+		let t = command::do_command(&mut context, &String::from("flags"));
+		t.write(&context, &mut stdout)?;
 		return Ok(());
 	} else if args.iter().any(|s| s == "--version") {
 		let t = FormattedText::new(format!(
@@ -62,12 +64,27 @@ pub fn main() -> Result<(), std::io::Error> {
 				"Your terminal supports {} colors.\n"
 			),
 			env!("CARGO_PKG_VERSION"),
-			term_colors
+			stdout.available_colors().unwrap_or(0)
 		));
 		t.write(&context, &mut stdout)?;
 		return Ok(());
+	} else if args.iter().any(|s| s == "--256color") {
+		context.config.term_color_type = 2;
+	} else if args.iter().any(|s| s == "--8color") {
+		context.config.term_color_type = 1;
+	} else if args.iter().any(|s| s == "--0color") {
+		context.config.term_color_type = 0;
+	} else if args.iter().any(|s| s == "--nosub") {
+		context.config.enable_substituion = false;
+	} else if args.iter().any(|s| s == "--nosuper") {
+		context.config.enable_super_powers = false;
+	} else if args.iter().any(|s| s == "--nooneover") {
+		context.config.enable_one_over_power = false;
 	}
 
+	context.config.check();
+
+
 	'outer: loop {
 
 		pb.write_prompt(&mut context, &mut stdout)?;
@@ -98,7 +115,15 @@ pub fn main() -> Result<(), std::io::Error> {
 
 						break;
 					},
-					_ => { pb.add_char(*q); }
+
+					// Only process sane characters
+					'a'..='z' | 'A'..='Z' | '0'..='9'
+					|'!'|'@'|'#'|'$'|'%'|'^'|'&'|'*'|'('|')'
+					|'?'|'~'|','|'.'|'['|']'
+					|'<'|'>'|'/'|'_'|'-'|':'|'|'|'='|'+'|';'
+					=> { pb.add_char(*q); },
+
+					_ => {}
 				};
 			} else {
 				match c.unwrap() {