Refactor and optimizations of emote parsing

- Split the to_vec::highlight function into get_emote_span, highlight,
  and build_line
- Fix bug where username highlights was using byte indices, and search
  highlight was using char indices.
- Don't format and clone time_sent string if config.show_datetimes is
  false
- Fix crash when running with both show_datetimes and username_shown set
  to false
- Fix right_align_usernames offset with emojis in username, fix overflow
  when usernames were > NAME_MAX_CHARACTERS len
- Fix emotes smaller than one cell being skipped when trying to display
  them
- Move some emote related functions into utils/
- Add some test for build_line and related functions

Cargo.toml

@@ -40,6 +40,7 @@ tempfile = "3.9.0"
 serde_with = "3.6.0"
 once_cell = "1.19.0"
 webbrowser = "0.8.12"
+memchr = "2.7.1"
 
 [[bin]]
 bench = false

src/emotes/mod.rs

@@ -9,7 +9,7 @@
         downloader::get_emotes,
         graphics_protocol::{ApplyCommand, Size},
     },
-    handlers::config::{CompleteConfig, FrontendConfig},
+    handlers::config::CompleteConfig,
     twitch::TwitchAction,
     utils::{emotes::get_emote_offset, pathing::cache_path},
 };
@@ -69,11 +69,6 @@
     }
 }
 
-#[inline]
-pub const fn emotes_enabled(frontend: &FrontendConfig) -> bool {
-    frontend.twitch_emotes || frontend.betterttv_emotes || frontend.seventv_emotes
-}
-
 pub async fn send_emotes(config: &CompleteConfig, tx: &Sender<DownloadedEmotes>, channel: &str) {
     info!("Starting emotes download.");
     match get_emotes(config, channel).await {
@@ -142,24 +137,24 @@
 
 pub fn overlay_emote(
     parent: (u32, u32),
     emote: EmoteData,
     layer: u32,
     cols: u16,
     root_col_offset: u16,
     cell_width: u16,
 ) -> Result<()> {
     // Center the overlay on top of the root emote.
     let (pixel_offset, col_offset) = get_emote_offset(emote.width as u16, cell_width, cols);
 
     let relative_col_offset = i32::from(root_col_offset) - i32::from(col_offset);
 
     graphics_protocol::Chain::new(
         emote.id,
         emote.pid,
         parent,
         layer,
         relative_col_offset,
         pixel_offset,
     )
     .apply()
 }

src/handlers/config.rs

@@ -14,13 +14,16 @@ use tokio::{runtime::Handle, task};
 use tui::widgets::BorderType;
 
 use crate::{
-    emotes::{emotes_enabled, graphics_protocol},
+    emotes::graphics_protocol,
     handlers::{
         args::{merge_args_into_config, Cli},
         interactive::interactive_config,
         state::State,
     },
-    utils::pathing::{cache_path, config_path},
+    utils::{
+        emotes::emotes_enabled,
+        pathing::{cache_path, config_path},
+    },
 };
 
 pub type SharedCompleteConfig = Rc<RefCell<CompleteConfig>>;