feat(view): global status line option

Add option to render single glboal status line instead of rendering
status line per view.

Fixes: https://github.com/helix-editor/helix/issues/2254

helix-term/src/ui/editor.rs

@@ -19,7 +19,7 @@ use helix_core::{
 use helix_view::{
     apply_transaction,
     document::{Mode, SCRATCH_BUFFER_NAME},
-    editor::{CompleteAction, CursorShapeConfig},
+    editor::{CompleteAction, CursorShapeConfig, StatusLineRenderConfig},
     graphics::{Color, CursorKind, Modifier, Rect, Style},
     input::{KeyEvent, MouseButton, MouseEvent, MouseEventKind},
     keyboard::{KeyCode, KeyModifiers},
@@ -80,7 +80,10 @@ impl EditorView {
         is_focused: bool,
     ) {
         let inner = view.inner_area(doc);
-        let area = view.area;
+        let area = match editor.config().statusline.render {
+            StatusLineRenderConfig::Single => view.area.clip_bottom(1),
+            StatusLineRenderConfig::PerView => view.area,
+        };
         let theme = &editor.theme;
         let config = editor.config();
 
@@ -164,13 +167,14 @@ impl EditorView {
             for y in area.top()..area.bottom() {
                 surface[(x, y)]
                     .set_symbol(tui::symbols::line::VERTICAL)
-                    //.set_symbol(" ")
                     .set_style(border_style);
             }
         }
 
         Self::render_diagnostics(doc, view, inner, surface, theme);
 
+        match editor.config().statusline.render {
+            StatusLineRenderConfig::PerView => {
                 let statusline_area = view
                     .area
                     .clip_top(view.area.height.saturating_sub(1))
@@ -181,6 +185,20 @@ impl EditorView {
 
                 statusline::render(&mut context, statusline_area, surface);
             }
+            StatusLineRenderConfig::Single => {
+                // -1 for command line
+                if viewport.bottom() - 1 != view.area.bottom() {
+                    let y = area.bottom();
+                    let border_style = theme.get("ui.window");
+                    for x in area.left()..area.right() {
+                        surface[(x, y)]
+                            .set_symbol(tui::symbols::line::HORIZONTAL)
+                            .set_style(border_style);
+                    }
+                }
+            }
+        };
+    }
 
     pub fn render_rulers(
         editor: &Editor,
@@ -1470,6 +1488,23 @@ impl Component for EditorView {
             self.render_view(cx.editor, doc, view, area, surface, is_focused);
         }
 
+        if config.statusline.render == StatusLineRenderConfig::Single {
+            if let Some((view, is_focused)) =
+                cx.editor.tree.views().find(|&(_, is_focused)| is_focused)
+            {
+                let doc = cx.editor.document(view.doc).unwrap();
+                let mut context = statusline::RenderContext::new(
+                    cx.editor,
+                    doc,
+                    view,
+                    is_focused,
+                    &self.spinners,
+                );
+                let statusline_area = area.clip_top(area.height.saturating_sub(2)).clip_bottom(1); // -1 from bottom to remove commandline
+                statusline::render(&mut context, statusline_area, surface);
+            }
+        }
+
         if config.auto_info {
             if let Some(mut info) = cx.editor.autoinfo.take() {
                 info.render(area, surface, cx);

helix-view/src/editor.rs

@@ -271,6 +271,7 @@ pub struct StatusLineConfig {
     pub right: Vec<StatusLineElement>,
     pub separator: String,
     pub mode: ModeConfig,
+    pub render: StatusLineRenderConfig,
 }
 
 impl Default for StatusLineConfig {
@@ -283,6 +284,7 @@ impl Default for StatusLineConfig {
             right: vec![E::Diagnostics, E::Selections, E::Position, E::FileEncoding],
             separator: String::from("│"),
             mode: ModeConfig::default(),
+            render: StatusLineRenderConfig::PerView,
         }
     }
 }
@@ -305,6 +307,13 @@ impl Default for ModeConfig {
     }
 }
 
+#[derive(Debug, Copy, Clone, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "kebab-case")]
+pub enum StatusLineRenderConfig {
+    Single,
+    PerView,
+}
+
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Serialize, Deserialize)]
 #[serde(rename_all = "kebab-case")]
 pub enum StatusLineElement {