Add CLI arg to disable the backspace key

Author: mgabrielmarin

README.md

@@ -50,7 +50,7 @@ scoop install ttyper
 For usage instructions, you can run `ttyper --help`:
 
 ```
-ttyper 1.5.0
+ttyper 1.6.1
 Terminal-based typing test.
 
 USAGE:
@@ -62,6 +62,7 @@ FLAGS:
         --list-languages    List installed languages
         --no-backtrack      Disable backtracking to completed words
         --sudden-death      Enable sudden death mode to restart on first error
+        --no-backspace      Disable backspace
     -V, --version           Prints version information
 
 OPTIONS:

src/main.rs

@@ -64,6 +64,10 @@ struct Opt {
     /// Enable sudden death mode to restart on first error
     #[arg(long)]
     sudden_death: bool,
+
+    /// Disable backspace
+    #[arg(long)]
+    no_backspace: bool,
 }
 
 impl Opt {
@@ -234,6 +238,7 @@ fn main() -> io::Result<()> {
         ),
         !opt.no_backtrack,
         opt.sudden_death,
+        !opt.no_backspace,
     ));
 
     state.render_into(&mut terminal, &config)?;
@@ -283,7 +288,8 @@ fn main() -> io::Result<()> {
                             "Couldn't get test contents. Make sure the specified language actually exists.",
                         ),
                         !opt.no_backtrack,
-                        opt.sudden_death
+                        opt.sudden_death,
+                        !opt.no_backspace,
                     ));
                 }
                 Event::Key(KeyEvent {
@@ -305,6 +311,7 @@ fn main() -> io::Result<()> {
                         practice_words,
                         !opt.no_backtrack,
                         opt.sudden_death,
+                        !opt.no_backspace,
                     ));
                 }
                 Event::Key(KeyEvent {

src/test/mod.rs

@@ -53,16 +53,23 @@ pub struct Test {
     pub complete: bool,
     pub backtracking_enabled: bool,
     pub sudden_death_enabled: bool,
+    pub backspace_enabled: bool,
 }
 
 impl Test {
-    pub fn new(words: Vec<String>, backtracking_enabled: bool, sudden_death_enabled: bool) -> Self {
+    pub fn new(
+        words: Vec<String>,
+        backtracking_enabled: bool,
+        sudden_death_enabled: bool,
+        backspace_enabled: bool,
+    ) -> Self {
         Self {
             words: words.into_iter().map(TestWord::from).collect(),
             current_word: 0,
             complete: false,
             backtracking_enabled,
             sudden_death_enabled,
+            backspace_enabled,
         }
     }
 
@@ -96,9 +103,9 @@ impl Test {
                 }
             }
             KeyCode::Backspace => {
-                if word.progress.is_empty() && self.backtracking_enabled {
+                if word.progress.is_empty() && self.backtracking_enabled && self.backspace_enabled {
                     self.last_word();
-                } else {
+                } else if self.backspace_enabled {
                     word.events.push(TestEvent {
                         time: Instant::now(),
                         correct: Some(!word.text.starts_with(&word.progress[..])),