added --plain functionality

examples/simple.rs

@@ -12,9 +12,18 @@ fn main() {
     let mut handle = stdout.lock();
 
     let show_color = true;
+    let show_char_table = true;
+    let show_position_indicator = true;
     let use_squeezing = false;
     let border_style = BorderStyle::Unicode;
 
-    let mut printer = Printer::new(&mut handle, show_color, border_style, use_squeezing);
+    let mut printer = Printer::new(
+        &mut handle,
+        show_color,
+        show_char_table,
+        show_position_indicator,
+        border_style,
+        use_squeezing,
+    );
     printer.print_all(&input[..]).unwrap();
 }

src/bin/hexyl.rs

@@ -104,24 +104,46 @@ fn run() -> Result<(), AnyhowError> {
                 .takes_value(true)
                 .value_name("WHEN")
                 .possible_values(&["always", "auto", "never"])
+                .default_value_if("plain", None, "never")
                 .default_value("always")
                 .help(
                     "When to use colors. The auto-mode only displays colors if the output \
                      goes to an interactive terminal",
                 ),
         )
+        .arg(
+            Arg::with_name("plain")
+                .short("p")
+                .long("plain")
+                .help("Display output with --no-chars, --no-position, and --border=none."),
+        )
         .arg(
             Arg::with_name("border")
                 .long("border")
                 .takes_value(true)
                 .value_name("STYLE")
                 .possible_values(&["unicode", "ascii", "none"])
+                .default_value_if("plain", None, "none")
                 .default_value("unicode")
                 .help(
                     "Whether to draw a border with Unicode characters, ASCII characters, \
                     or none at all",
                 ),
         )
+        .arg(
+            Arg::with_name("no_chars")
+                .short("C")
+                .long("no-chars")
+                .conflicts_with("plain")
+                .help("Whether to display the character table on the right."),
+        )
+        .arg(
+            Arg::with_name("no_position")
+                .short("P")
+                .long("no-position")
+                .conflicts_with("plain")
+                .help("Whether to display the position indicator on the left."),
+        )
         .arg(
             Arg::with_name("display_offset")
                 .short("o")
@@ -237,6 +259,13 @@ fn run() -> Result<(), AnyhowError> {
 
     let squeeze = !matches.is_present("nosqueezing");
 
+    // -nc true && false
+    // -plain true && false
+    let show_char_table = !matches.is_present("no_chars") && !matches.is_present("plain");
+
+    let show_position_indicator =
+        !matches.is_present("no_position") && !matches.is_present("plain");
+
     let display_offset: u64 = matches
         .value_of("display_offset")
         .map(|s| {
@@ -251,7 +280,14 @@ fn run() -> Result<(), AnyhowError> {
     let stdout = io::stdout();
     let mut stdout_lock = stdout.lock();
 
-    let mut printer = Printer::new(&mut stdout_lock, show_color, border_style, squeeze);
+    let mut printer = Printer::new(
+        &mut stdout_lock,
+        show_color,
+        show_char_table,
+        show_position_indicator,
+        border_style,
+        squeeze,
+    );
     printer.display_offset(skip_offset + display_offset);
     printer.print_all(&mut reader).map_err(|e| anyhow!(e))?;
 

src/lib.rs

@@ -146,6 +146,8 @@ pub struct Printer<'a, Writer: Write> {
     buffer_line: Vec<u8>,
     writer: &'a mut Writer,
     show_color: bool,
+    show_char_table: bool,
+    show_position_indicator: bool,
     border_style: BorderStyle,
     header_was_printed: bool,
     byte_hex_table: Vec<String>,
@@ -158,6 +160,8 @@ impl<'a, Writer: Write> Printer<'a, Writer> {
     pub fn new(
         writer: &'a mut Writer,
         show_color: bool,
+        show_char_table: bool,
+        show_position_indicator: bool,
         border_style: BorderStyle,
         use_squeeze: bool,
     ) -> Printer<'a, Writer> {
@@ -167,6 +171,8 @@ impl<'a, Writer: Write> Printer<'a, Writer> {
             buffer_line: vec![],
             writer,
             show_color,
+            show_char_table,
+            show_position_indicator,
             border_style,
             header_was_printed: false,
             byte_hex_table: (0u8..=u8::max_value())
@@ -179,16 +185,20 @@ impl<'a, Writer: Write> Printer<'a, Writer> {
                     }
                 })
                 .collect(),
-            byte_char_table: (0u8..=u8::max_value())
-                .map(|i| {
-                    let byte_char = format!("{}", Byte(i).as_char());
-                    if show_color {
-                        Byte(i).color().paint(byte_char).to_string()
-                    } else {
-                        byte_char
-                    }
+            byte_char_table: show_char_table
+                .then(|| {
+                    (0u8..=u8::max_value())
+                        .map(|i| {
+                            let byte_char = format!("{}", Byte(i).as_char());
+                            if show_color {
+                                Byte(i).color().paint(byte_char).to_string()
+                            } else {
+                                byte_char
+                            }
+                        })
+                        .collect()
                 })
-                .collect(),
+                .unwrap_or_default(),
             squeezer: Squeezer::new(use_squeeze),
             display_offset: 0,
         }
@@ -199,42 +209,39 @@ impl<'a, Writer: Write> Printer<'a, Writer> {
         self
     }
 
-    pub fn header(&mut self) {
-        if let Some(border_elements) = self.border_style.header_elems() {
-            let h = border_elements.horizontal_line;
-            let h8 = h.to_string().repeat(8);
-            let h25 = h.to_string().repeat(25);
+    fn write_border(&mut self, border_elements: BorderElements) {
+        let h = border_elements.horizontal_line;
+        let c = border_elements.column_separator;
+        let l = border_elements.left_corner;
+        let r = border_elements.right_corner;
+        let h8 = h.to_string().repeat(8);
+        let h25 = h.to_string().repeat(25);
 
-            writeln!(
-                self.writer,
-                "{l}{h8}{c}{h25}{c}{h25}{c}{h8}{c}{h8}{r}",
-                l = border_elements.left_corner,
-                c = border_elements.column_separator,
-                r = border_elements.right_corner,
-                h8 = h8,
-                h25 = h25
-            )
-            .ok();
+        if self.show_position_indicator {
+            write!(self.writer, "{l}{h8}{c}", l = l, c = c, h8 = h8).ok();
+        } else {
+            write!(self.writer, "{}", l).ok();
+        }
+
+        write!(self.writer, "{h25}{c}{h25}", c = c, h25 = h25).ok();
+
+        if self.show_char_table {
+            writeln!(self.writer, "{c}{h8}{c}{h8}{r}", c = c, h8 = h8, r = r).ok();
+        } else {
+            writeln!(self.writer, "{r}", r = r).ok();
         }
     }
 
-    pub fn footer(&mut self) {
-        if let Some(border_elements) = self.border_style.footer_elems() {
-            let h = border_elements.horizontal_line;
-            let h8 = h.to_string().repeat(8);
-            let h25 = h.to_string().repeat(25);
+    pub fn header(&mut self) {
+        self.border_style
+            .header_elems()
+            .map(|e| self.write_border(e));
+    }
 
-            writeln!(
-                self.writer,
-                "{l}{h8}{c}{h25}{c}{h25}{c}{h8}{c}{h8}{r}",
-                l = border_elements.left_corner,
-                c = border_elements.column_separator,
-                r = border_elements.right_corner,
-                h8 = h8,
-                h25 = h25
-            )
-            .ok();
-        }
+    pub fn footer(&mut self) {
+        self.border_style
+            .footer_elems()
+            .map(|e| self.write_border(e));
     }
 
     fn print_position_indicator(&mut self) {
@@ -242,6 +249,10 @@ impl<'a, Writer: Write> Printer<'a, Writer> {
             self.header();
             self.header_was_printed = true;
         }
+        if !self.show_position_indicator {
+            write!(&mut self.buffer_line, "{} ", self.border_style.outer_sep()).ok();
+            return;
+        }
 
         let style = COLOR_OFFSET.normal();
         let byte_index = format!("{:08x}", self.idx - 1 + self.display_offset);
@@ -259,6 +270,51 @@ impl<'a, Writer: Write> Printer<'a, Writer> {
         );
     }
 
+    pub fn print_char_table(&mut self) {
+        let len = self.raw_line.len();
+
+        if !self.show_char_table {
+            // just write newline if character table is hidden
+            writeln!(&mut self.buffer_line, "").ok();
+            return;
+        }
+
+        let mut idx = 1;
+        for &b in self.raw_line.iter() {
+            let _ = write!(
+                &mut self.buffer_line,
+                "{}",
+                self.byte_char_table[b as usize]
+            );
+
+            if idx == 8 {
+                let _ = write!(&mut self.buffer_line, "{}", self.border_style.inner_sep());
+            }
+
+            idx += 1;
+        }
+
+        if len < 8 {
+            let _ = writeln!(
+                &mut self.buffer_line,
+                "{0:1$}{3}{0:2$}{4}",
+                "",
+                8 - len,
+                8,
+                self.border_style.inner_sep(),
+                self.border_style.outer_sep(),
+            );
+        } else {
+            let _ = writeln!(
+                &mut self.buffer_line,
+                "{0:1$}{2}",
+                "",
+                16 - len,
+                self.border_style.outer_sep()
+            );
+        }
+    }
+
     pub fn print_byte(&mut self, b: u8) -> io::Result<()> {
         if self.idx % 16 == 1 {
             self.print_position_indicator();
@@ -327,43 +383,10 @@ impl<'a, Writer: Write> Printer<'a, Writer> {
                     self.border_style.outer_sep()
                 );
             }
-
-            let mut idx = 1;
-            for &b in self.raw_line.iter() {
-                let _ = write!(
-                    &mut self.buffer_line,
-                    "{}",
-                    self.byte_char_table[b as usize]
-                );
-
-                if idx == 8 {
-                    let _ = write!(&mut self.buffer_line, "{}", self.border_style.inner_sep());
-                }
-
-                idx += 1;
-            }
-
-            if len < 8 {
-                let _ = writeln!(
-                    &mut self.buffer_line,
-                    "{0:1$}{3}{0:2$}{4}",
-                    "",
-                    8 - len,
-                    8,
-                    self.border_style.inner_sep(),
-                    self.border_style.outer_sep(),
-                );
-            } else {
-                let _ = writeln!(
-                    &mut self.buffer_line,
-                    "{0:1$}{2}",
-                    "",
-                    16 - len,
-                    self.border_style.outer_sep()
-                );
-            }
         }
 
+        self.print_char_table();
+
         match squeeze_action {
             SqueezeAction::Print => {
                 self.buffer_line.clear();
@@ -431,11 +454,19 @@ impl<'a, Writer: Write> Printer<'a, Writer> {
 
         if !self.header_was_printed() {
             self.header();
-            writeln!(
+            if self.show_position_indicator {
+                write!(self.writer, "{0:9}", "│").ok();
+            }
+            write!(
                 self.writer,
-                "│        │ No content to print     │                         │        │        │"
+                "{0:2}{1:24}{0}{0:>26}",
+                "│", "No content to print"
             )
             .ok();
+            if self.show_char_table {
+                write!(self.writer, "{0:>9}{0:>9}", "│").ok();
+            }
+            writeln!(self.writer, "").ok();
         }
         self.footer();
 
@@ -452,12 +483,12 @@ mod tests {
 
     fn assert_print_all_output<Reader: Read>(input: Reader, expected_string: String) -> () {
         let mut output = vec![];
-        let mut printer = Printer::new(&mut output, false, BorderStyle::Unicode, true);
+        let mut printer = Printer::new(&mut output, false, true, true, BorderStyle::Unicode, true);
 
         printer.print_all(input).unwrap();
 
         let actual_string: &str = str::from_utf8(&output).unwrap();
-        assert_eq!(actual_string, expected_string)
+        assert_eq!(actual_string, expected_string,)
     }
 
     #[test]
@@ -497,7 +528,7 @@ mod tests {
 
         let mut output = vec![];
         let mut printer: Printer<Vec<u8>> =
-            Printer::new(&mut output, false, BorderStyle::Unicode, true);
+            Printer::new(&mut output, false, true, true, BorderStyle::Unicode, true);
         printer.display_offset(0xdeadbeef);
 
         printer.print_all(input).unwrap();

tests/integration_tests.rs

@@ -227,3 +227,64 @@ mod blocksize {
             .failure();
     }
 }
+
+mod display_settings {
+    use super::hexyl;
+
+    #[test]
+    fn plain() {
+        hexyl()
+            .arg("ascii")
+            .arg("--plain")
+            .assert()
+            .success()
+            .stdout("  30 31 32 33 34 35 36 37   38 39 61 62 63 64 65 0a  \n");
+    }
+
+    #[test]
+    fn no_chars() {
+        hexyl()
+            .arg("ascii")
+            .arg("--no-chars")
+            .arg("--color=never")
+            .assert()
+            .success()
+            .stdout(
+                "┌────────┬─────────────────────────┬─────────────────────────┐\n\
+                 │00000000│ 30 31 32 33 34 35 36 37 ┊ 38 39 61 62 63 64 65 0a │\n\
+                 └────────┴─────────────────────────┴─────────────────────────┘\n",
+            );
+    }
+
+    #[test]
+    fn no_position() {
+        hexyl()
+            .arg("ascii")
+            .arg("--no-position")
+            .arg("--color=never")
+            .assert()
+            .success()
+            .stdout(
+                "┌─────────────────────────┬─────────────────────────┬────────┬────────┐\n\
+                 │ 30 31 32 33 34 35 36 37 ┊ 38 39 61 62 63 64 65 0a │01234567┊89abcde_│\n\
+                 └─────────────────────────┴─────────────────────────┴────────┴────────┘\n",
+            );
+    }
+
+    // #[test]
+    // fn display_offset_and_skip() {
+    //     hexyl()
+    //     .arg("hello_world_elf64")
+    //     .arg("--color=never")
+    //     .arg("--display-offset=0x20")
+    //     .arg("--skip=0x10")
+    //     .arg("--length=0x10")
+    //     .assert()
+    //     .success()
+    //     .stdout(
+    //         "┌────────┬─────────────────────────┬─────────────────────────┬────────┬────────┐\n\
+    //          │00000030│ 02 00 3e 00 01 00 00 00 ┊ 00 10 40 00 00 00 00 00 │•0>0•000┊0•@00000│\n\
+    //          └────────┴─────────────────────────┴─────────────────────────┴────────┴────────┘\n",
+    //     );
+    // }
+}