Cleanup/render wo ratatui

Cargo.toml

@@ -10,6 +10,10 @@ repository = "https://github.com/altsem/gitu"
 name = "show"
 harness = false
 
+[[bench]]
+name = "ui"
+harness = false
+
 [dev-dependencies]
 pretty_assertions = "1.4.1"
 temp-dir = "0.1.16"
@@ -42,10 +46,8 @@ log = "0.4.28"
 nom = "8.0.0"
 notify = "8.0.0"
 serde = { version = "1.0.225", features = ["derive"] }
-ratatui = { version = "0.29.0", features = ["serde"] }
 simple-logging = "2.0.2"
 toml = "0.8.23"
-tui-prompts = "0.5.2"
 tree-sitter = "=0.25.6"
 tree-sitter-highlight = "=0.25.6"
 tree-sitter-rust = "=0.24.0"
@@ -71,7 +73,7 @@ regex = "1.12.2"
 strip-ansi-escapes = "0.2.1"
 unicode-segmentation = "1.12.0"
 cached = "0.56.0"
-strum = { version = "0.26.3", features = ["strum_macros"] }
+strum = { version = "0.26.3", features = ["derive"] }
 tinyvec = "1.10.0"
 smashquote = "0.1.2"
 imara-diff = { version = "0.2.0", default-features = false }

benches/show.rs

@@ -1,16 +1,18 @@
 use std::sync::Arc;
 
 use criterion::{Criterion, criterion_group, criterion_main};
-use gitu::{cli::Commands, config, term::TermBackend};
-use ratatui::{Terminal, backend::TestBackend};
+use gitu::{
+    cli::Commands,
+    config,
+    term::{TermBackend, TestBuffer},
+};
 
 fn show(c: &mut Criterion) {
     c.bench_function("show", |b| {
-        let mut terminal = Terminal::new(TermBackend::Test {
-            backend: TestBackend::new(80, 1000),
+        let mut terminal = TermBackend::Test {
+            buffer: TestBuffer::new(80, 1000),
             events: vec![],
-        })
-        .unwrap();
+        };
 
         let args = gitu::cli::Args {
             command: Some(Commands::Show {

benches/ui.rs

@@ -0,0 +1,43 @@
+use std::rc::Rc;
+use std::sync::Arc;
+
+use criterion::{Criterion, criterion_group, criterion_main};
+use git2::Repository;
+use gitu::app::App;
+use gitu::cli::{Args, Commands};
+use gitu::config;
+use gitu::term::{TermBackend, TestBuffer};
+
+const REFERENCE: &str = "f4de01c0a12794d7b42a77b2138aa64119b90ea5";
+
+/// Times a redraw of an already-built screen, leaving repo access, diff
+/// parsing and item creation out of the measurement.
+fn bench_redraw(c: &mut Criterion, name: &str, size: (u16, u16)) {
+    c.bench_function(name, |b| {
+        let mut term = TermBackend::Test {
+            buffer: TestBuffer::new(size.0, size.1),
+            events: vec![],
+        };
+
+        let args = Args {
+            command: Some(Commands::Show {
+                reference: REFERENCE.into(),
+            }),
+            ..Default::default()
+        };
+
+        let config = Arc::new(config::init_config(args.config.clone()).unwrap());
+        let repo = Rc::new(Repository::open_from_env().unwrap());
+        let mut app = App::create(repo, size, &args, config, false).unwrap();
+
+        b.iter(|| app.redraw_now(&mut term).unwrap());
+    });
+}
+
+fn ui(c: &mut Criterion) {
+    // The whole diff at once, so that per-row costs dominate.
+    bench_redraw(c, "ui/40x1000", (40, 1000));
+}
+
+criterion_group!(benches, ui);
+criterion_main!(benches);