show branchname in commit mssage box (closes #529)

Author: Stephan Dilly

Diff for: CHANGELOG.md

@@ -15,6 +15,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ![push](assets/char_count.gif)
 
 ### Fixed
+- don't hide branch name while in commit dialog ([#529](https://github.com/extrawurst/gitui/issues/529))
 - don't discard commit message without confirmation ([#530](https://github.com/extrawurst/gitui/issues/530))
 - compilation broken on freebsd ([#461](https://github.com/extrawurst/gitui/issues/461))
 - don’t fail if `user.name` is not set [[@cruessler](https://github.com/cruessler)] ([#79](https://github.com/extrawurst/gitui/issues/79)) ([#228](https://github.com/extrawurst/gitui/issues/228))

Diff for: src/app.rs

@@ -280,6 +280,7 @@ impl App {
     pub fn update(&mut self) -> Result<()> {
         log::trace!("update");
 
+        self.commit.update()?;
         self.status_tab.update()?;
         self.revlog.update()?;
         self.stashing_tab.update()?;

Diff for: src/components/commit.rs

@@ -12,6 +12,7 @@ use crate::{
 };
 use anyhow::Result;
 use asyncgit::{
+    cached,
     sync::{self, CommitId, HookResult},
     CWD,
 };
@@ -21,13 +22,19 @@ use std::{
     io::{Read, Write},
     path::PathBuf,
 };
-use tui::{backend::Backend, layout::Rect, Frame};
+use tui::{
+    backend::Backend,
+    layout::{Alignment, Rect},
+    widgets::Paragraph,
+    Frame,
+};
 
 pub struct CommitComponent {
     input: TextInputComponent,
     amend: Option<CommitId>,
     queue: Queue,
     key_config: SharedKeyConfig,
+    git_branch_name: cached::BranchName,
 }
 
 impl DrawableComponent for CommitComponent {
@@ -36,7 +43,10 @@ impl DrawableComponent for CommitComponent {
         f: &mut Frame<B>,
         rect: Rect,
     ) -> Result<()> {
-        self.input.draw(f, rect)?;
+        if self.is_visible() {
+            self.input.draw(f, rect)?;
+            self.draw_branch_name(f);
+        }
 
         Ok(())
     }
@@ -143,6 +153,29 @@ impl CommitComponent {
                 true,
             ),
             key_config,
+            git_branch_name: cached::BranchName::new(CWD),
+        }
+    }
+
+    ///
+    pub fn update(&mut self) -> Result<()> {
+        self.git_branch_name.lookup().map(Some).unwrap_or(None);
+        Ok(())
+    }
+
+    fn draw_branch_name<B: Backend>(&self, f: &mut Frame<B>) {
+        if let Some(name) = self.git_branch_name.last() {
+            let w = Paragraph::new(format!("{{{}}}", name))
+                .alignment(Alignment::Right);
+
+            let rect = {
+                let mut rect = self.input.get_area();
+                rect.height = 1;
+                rect.width = rect.width.saturating_sub(1);
+                rect
+            };
+
+            f.render_widget(w, rect);
         }
     }
 

Diff for: src/components/textinput.rs

@@ -11,7 +11,7 @@ use crate::{
 use anyhow::Result;
 use crossterm::event::{Event, KeyCode, KeyModifiers};
 use itertools::Itertools;
-use std::{collections::HashMap, ops::Range};
+use std::{cell::Cell, collections::HashMap, ops::Range};
 use tui::{
     backend::Backend,
     layout::{Alignment, Rect},
@@ -39,6 +39,7 @@ pub struct TextInputComponent {
     key_config: SharedKeyConfig,
     cursor_position: usize,
     input_type: InputType,
+    current_area: Cell<Rect>,
 }
 
 impl TextInputComponent {
@@ -60,6 +61,7 @@ impl TextInputComponent {
             default_msg: default_msg.to_string(),
             cursor_position: 0,
             input_type: InputType::Multiline,
+            current_area: Cell::new(Rect::default()),
         }
     }
 
@@ -82,6 +84,11 @@ impl TextInputComponent {
         &self.msg
     }
 
+    /// screen area (last time we got drawn)
+    pub fn get_area(&self) -> Rect {
+        self.current_area.get()
+    }
+
     /// Move the cursor right one char.
     fn incr_cursor(&mut self) {
         if let Some(pos) = self.next_char_position() {
@@ -298,6 +305,8 @@ impl DrawableComponent for TextInputComponent {
             if self.show_char_count {
                 self.draw_char_count(f, area);
             }
+
+            self.current_area.set(area);
         }
 
         Ok(())