Show (git) diff signs in gutter (#3890)

* Show (git) diff signs in gutter (#3890) Avoid string allocation when git diffing Incrementally diff using changesets refactor diffs to be provider indepndent and improve git implementation remove dependency on zlib-ng switch to asynchronus diffing with similar Update helix-vcs/Cargo.toml fix toml formatting Co-authored-by: Ivan Tham <[email protected]> fix typo in documentation use ropey reexpors from helix-core fix crash when creating new file remove useless use if io::Cursor fix spelling mistakes implement suggested improvement to repository loading improve git test isolation remove lefover comments Co-authored-by: univerz <[email protected]> fixed spelling mistake minor cosmetic changes fix: set self.differ to None if decoding the diff_base fails fixup formatting Co-authored-by: Ivan Tham <[email protected]> reload diff_base when file is reloaded from disk switch to imara-diff Fixup formatting Co-authored-by: Blaž Hrastnik <[email protected]> Redraw buffer whenever a diff is updated. Only store hunks instead of changes for individual lines to easily allow jumping between them Update to latest gitoxide version Change default diff gutter position Only update gutter after timeout * update diff gutter synchronously, with a timeout * Apply suggestions from code review Co-authored-by: Blaž Hrastnik <[email protected]> Co-authored-by: Michael Davis <[email protected]> * address review comments and ensure lock is always aquired * remove configuration for redraw timeout Co-authored-by: Blaž Hrastnik <[email protected]> Co-authored-by: Michael Davis <[email protected]>
helix-editor · Dec 1, 2022 · 5a3ff74 · 5a3ff74
1 parent 67415e0
commit 5a3ff74
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diff --git a/Cargo.lock b/Cargo.lock
diff --git a/Cargo.toml b/Cargo.toml
@@ -7,6 +7,7 @@ members = [
   "helix-lsp",
   "helix-dap",
   "helix-loader",
+  "helix-vcs",
   "xtask",
 ]
 

diff --git a/book/src/configuration.md b/book/src/configuration.md
@@ -46,7 +46,7 @@ on unix operating systems.
 | `line-number` | Line number display: `absolute` simply shows each line's number, while `relative` shows the distance from the current line. When unfocused or in insert mode, `relative` will still show absolute line numbers. | `absolute` |
 | `cursorline` | Highlight all lines with a cursor. | `false` |
 | `cursorcolumn` | Highlight all columns with a cursor. | `false` |
-| `gutters` | Gutters to display: Available are `diagnostics` and `line-numbers` and `spacer`, note that `diagnostics` also includes other features like breakpoints, 1-width padding will be inserted if gutters is non-empty | `["diagnostics", "spacer", "line-numbers"]` |
+| `gutters` | Gutters to display: Available are `diagnostics` and `diff` and `line-numbers` and `spacer`, note that `diagnostics` also includes other features like breakpoints, 1-width padding will be inserted if gutters is non-empty | `["diagnostics", "spacer", "line-numbers", "spacer", "diff"]` |
 | `auto-completion` | Enable automatic pop up of auto-completion. | `true` |
 | `auto-format` | Enable automatic formatting on save. | `true` |
 | `auto-save` | Enable automatic saving on focus moving away from Helix. Requires [focus event support](https://github.com/helix-editor/helix/wiki/Terminal-Support) from your terminal. | `false` |

diff --git a/helix-core/src/lib.rs b/helix-core/src/lib.rs
@@ -83,7 +83,7 @@ pub fn find_root(root: Option<&str>, root_markers: &[String]) -> std::path::Path
     top_marker.map_or(current_dir, |a| a.to_path_buf())
 }
 
-pub use ropey::{str_utils, Rope, RopeBuilder, RopeSlice};
+pub use ropey::{self, str_utils, Rope, RopeBuilder, RopeSlice};
 
 // pub use tendril::StrTendril as Tendril;
 pub use smartstring::SmartString;

diff --git a/helix-term/Cargo.toml b/helix-term/Cargo.toml
@@ -17,8 +17,10 @@ build = true
 app = true
 
 [features]
+default = ["git"]
 unicode-lines = ["helix-core/unicode-lines"]
 integration = []
+git = ["helix-vcs/git"]
 
 [[bin]]
 name = "hx"
@@ -29,6 +31,7 @@ helix-core = { version = "0.6", path = "../helix-core" }
 helix-view = { version = "0.6", path = "../helix-view" }
 helix-lsp = { version = "0.6", path = "../helix-lsp" }
 helix-dap = { version = "0.6", path = "../helix-dap" }
+helix-vcs = { version = "0.6", path = "../helix-vcs" }
 helix-loader = { version = "0.6", path = "../helix-loader" }
 
 anyhow = "1"

diff --git a/helix-term/src/application.rs b/helix-term/src/application.rs
@@ -274,16 +274,27 @@ impl Application {
     }
 
     #[cfg(feature = "integration")]
-    fn render(&mut self) {}
+    async fn render(&mut self) {}
 
     #[cfg(not(feature = "integration"))]
-    fn render(&mut self) {
+    async fn render(&mut self) {
         let mut cx = crate::compositor::Context {
             editor: &mut self.editor,
             jobs: &mut self.jobs,
             scroll: None,
         };
 
+        // Acquire mutable access to the redraw_handle lock
+        // to ensure that there are no tasks running that want to block rendering
+        drop(cx.editor.redraw_handle.1.write().await);
+        cx.editor.needs_redraw = false;
+        {
+            // exhaust any leftover redraw notifications
+            let notify = cx.editor.redraw_handle.0.notified();
+            tokio::pin!(notify);
+            notify.enable();
+        }
+
         let area = self
             .terminal
             .autoresize()
@@ -304,7 +315,7 @@ impl Application {
     where
         S: Stream<Item = crossterm::Result<crossterm::event::Event>> + Unpin,
     {
-        self.render();
+        self.render().await;
         self.last_render = Instant::now();
 
         loop {
@@ -329,18 +340,18 @@ impl Application {
                 biased;
 
                 Some(event) = input_stream.next() => {
-                    self.handle_terminal_events(event);
+                    self.handle_terminal_events(event).await;
                 }
                 Some(signal) = self.signals.next() => {
                     self.handle_signals(signal).await;
                 }
                 Some(callback) = self.jobs.futures.next() => {
                     self.jobs.handle_callback(&mut self.editor, &mut self.compositor, callback);
-                    self.render();
+                    self.render().await;
                 }
                 Some(callback) = self.jobs.wait_futures.next() => {
                     self.jobs.handle_callback(&mut self.editor, &mut self.compositor, callback);
-                    self.render();
+                    self.render().await;
                 }
                 event = self.editor.wait_event() => {
                     let _idle_handled = self.handle_editor_event(event).await;
@@ -445,25 +456,25 @@ impl Application {
                 self.compositor.resize(area);
                 self.terminal.clear().expect("couldn't clear terminal");
 
-                self.render();
+                self.render().await;
             }
             signal::SIGUSR1 => {
                 self.refresh_config();
-                self.render();
+                self.render().await;
             }
             _ => unreachable!(),
         }
     }
 
-    pub fn handle_idle_timeout(&mut self) {
+    pub async fn handle_idle_timeout(&mut self) {
         let mut cx = crate::compositor::Context {
             editor: &mut self.editor,
             jobs: &mut self.jobs,
             scroll: None,
         };
         let should_render = self.compositor.handle_event(&Event::IdleTimeout, &mut cx);
-        if should_render {
-            self.render();
+        if should_render || self.editor.needs_redraw {
+            self.render().await;
         }
     }
 
@@ -536,31 +547,31 @@ impl Application {
         match event {
             EditorEvent::DocumentSaved(event) => {
                 self.handle_document_write(event);
-                self.render();
+                self.render().await;
             }
             EditorEvent::ConfigEvent(event) => {
                 self.handle_config_events(event);
-                self.render();
+                self.render().await;
             }
             EditorEvent::LanguageServerMessage((id, call)) => {
                 self.handle_language_server_message(call, id).await;
                 // limit render calls for fast language server messages
                 let last = self.editor.language_servers.incoming.is_empty();
 
                 if last || self.last_render.elapsed() > LSP_DEADLINE {
-                    self.render();
+                    self.render().await;
                     self.last_render = Instant::now();
                 }
             }
             EditorEvent::DebuggerEvent(payload) => {
                 let needs_render = self.editor.handle_debugger_message(payload).await;
                 if needs_render {
-                    self.render();
+                    self.render().await;
                 }
             }
             EditorEvent::IdleTimer => {
                 self.editor.clear_idle_timer();
-                self.handle_idle_timeout();
+                self.handle_idle_timeout().await;
 
                 #[cfg(feature = "integration")]
                 {
@@ -572,7 +583,10 @@ impl Application {
         false
     }
 
-    pub fn handle_terminal_events(&mut self, event: Result<CrosstermEvent, crossterm::ErrorKind>) {
+    pub async fn handle_terminal_events(
+        &mut self,
+        event: Result<CrosstermEvent, crossterm::ErrorKind>,
+    ) {
         let mut cx = crate::compositor::Context {
             editor: &mut self.editor,
             jobs: &mut self.jobs,
@@ -596,7 +610,7 @@ impl Application {
         };
 
         if should_redraw && !self.editor.should_close() {
-            self.render();
+            self.render().await;
         }
     }
 

diff --git a/helix-term/src/commands/typed.rs b/helix-term/src/commands/typed.rs
@@ -1028,10 +1028,12 @@ fn reload(
     }
 
     let scrolloff = cx.editor.config().scrolloff;
+    let redraw_handle = cx.editor.redraw_handle.clone();
     let (view, doc) = current!(cx.editor);
-    doc.reload(view).map(|_| {
-        view.ensure_cursor_in_view(doc, scrolloff);
-    })
+    doc.reload(view, &cx.editor.diff_providers, redraw_handle)
+        .map(|_| {
+            view.ensure_cursor_in_view(doc, scrolloff);
+        })
 }
 
 fn reload_all(
@@ -1066,7 +1068,8 @@ fn reload_all(
 
         // Every doc is guaranteed to have at least 1 view at this point.
         let view = view_mut!(cx.editor, view_ids[0]);
-        doc.reload(view)?;
+        let redraw_handle = cx.editor.redraw_handle.clone();
+        doc.reload(view, &cx.editor.diff_providers, redraw_handle)?;
 
         for view_id in view_ids {
             let view = view_mut!(cx.editor, view_id);

diff --git a/helix-term/src/ui/editor.rs b/helix-term/src/ui/editor.rs
@@ -730,7 +730,7 @@ impl EditorView {
         let mut text = String::with_capacity(8);
 
         for gutter_type in view.gutters() {
-            let gutter = gutter_type.style(editor, doc, view, theme, is_focused);
+            let mut gutter = gutter_type.style(editor, doc, view, theme, is_focused);
             let width = gutter_type.width(view, doc);
             text.reserve(width); // ensure there's enough space for the gutter
             for (i, line) in (view.offset.row..(last_line + 1)).enumerate() {

diff --git a/helix-vcs/Cargo.toml b/helix-vcs/Cargo.toml
@@ -0,0 +1,28 @@
+[package]
+name = "helix-vcs"
+version = "0.6.0"
+authors = ["Blaž Hrastnik <[email protected]>"]
+edition = "2021"
+license = "MPL-2.0"
+categories = ["editor"]
+repository = "https://github.com/helix-editor/helix"
+homepage = "https://helix-editor.com"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+helix-core = { version = "0.6", path = "../helix-core" }
+
+tokio = { version = "1", features = ["rt", "rt-multi-thread", "time", "sync", "parking_lot", "macros"] }
+parking_lot = "0.12"
+
+git-repository = { version = "0.26", default-features = false , optional = true }
+imara-diff = "0.1.5"
+
+log = "0.4"
+
+[features]
+git = ["git-repository"]
+
+[dev-dependencies]
+tempfile = "3.3"