Show infobox with register contents

helix-core/src/register.rs

@@ -68,4 +68,8 @@ impl Registers {
     pub fn read(&self, name: char) -> Option<&[String]> {
         self.get(name).map(|reg| reg.read())
     }
+
+    pub fn inner(&self) -> &HashMap<char, Register> {
+        &self.inner
+    }
 }

helix-term/src/commands.rs

@@ -20,6 +20,7 @@ use helix_view::{
     clipboard::ClipboardType,
     document::{Mode, SCRATCH_BUFFER_NAME},
     editor::{Action, Motion},
+    info::Info,
     input::KeyEvent,
     keyboard::KeyCode,
     view::View,
@@ -5750,8 +5751,10 @@ fn wonly(cx: &mut Context) {
 }
 
 fn select_register(cx: &mut Context) {
+    cx.editor.autoinfo = Some(Info::from_registers(&cx.editor.registers));
     cx.on_next_key(move |cx, event| {
         if let Some(ch) = event.char() {
+            cx.editor.autoinfo = None;
             cx.editor.selected_register = Some(ch);
         }
     })

helix-term/src/keymap.rs

@@ -222,9 +222,8 @@ impl KeyTrieNode {
                 .map(|(desc, keys)| (desc.strip_prefix(&prefix).unwrap(), keys))
                 .collect();
         }
-        Info::new(self.name(), body)
+        Info::from_keymap(self.name(), body)
     }
-
     /// Get a reference to the key trie node's order.
     pub fn order(&self) -> &[KeyEvent] {
         self.order.as_slice()

helix-term/src/ui/editor.rs

@@ -21,7 +21,6 @@ use helix_view::{
     document::{Mode, SCRATCH_BUFFER_NAME},
     editor::CursorShapeConfig,
     graphics::{CursorKind, Modifier, Rect, Style},
-    info::Info,
     input::KeyEvent,
     keyboard::{KeyCode, KeyModifiers},
     Document, Editor, Theme, View,
@@ -37,7 +36,6 @@ pub struct EditorView {
     last_insert: (commands::MappableCommand, Vec<KeyEvent>),
     pub(crate) completion: Option<Completion>,
     spinners: ProgressSpinners,
-    autoinfo: Option<Info>,
 }
 
 impl Default for EditorView {
@@ -54,7 +52,6 @@ impl EditorView {
             last_insert: (commands::MappableCommand::normal_mode, Vec::new()),
             completion: None,
             spinners: ProgressSpinners::default(),
-            autoinfo: None,
         }
     }
 
@@ -678,13 +675,13 @@ impl EditorView {
         cxt: &mut commands::Context,
         event: KeyEvent,
     ) -> Option<KeymapResult> {
-        self.autoinfo = None;
+        cxt.editor.autoinfo = None;
         let key_result = self.keymaps.get_mut(&mode).unwrap().get(event);
-        self.autoinfo = key_result.sticky.map(|node| node.infobox());
+        cxt.editor.autoinfo = key_result.sticky.map(|node| node.infobox());
 
         match &key_result.kind {
             KeymapResultKind::Matched(command) => command.execute(cxt),
-            KeymapResultKind::Pending(node) => self.autoinfo = Some(node.infobox()),
+            KeymapResultKind::Pending(node) => cxt.editor.autoinfo = Some(node.infobox()),
             KeymapResultKind::MatchedSequence(commands) => {
                 for command in commands {
                     command.execute(cxt);
@@ -1093,8 +1090,9 @@ impl Component for EditorView {
         }
 
         if cx.editor.config.auto_info {
-            if let Some(ref mut info) = self.autoinfo {
+            if let Some(mut info) = cx.editor.autoinfo.take() {
                 info.render(area, surface, cx);
+                cx.editor.autoinfo = Some(info)
             }
         }
 

helix-view/src/editor.rs

@@ -2,6 +2,7 @@ use crate::{
     clipboard::{get_clipboard_provider, ClipboardProvider},
     document::{Mode, SCRATCH_BUFFER_NAME},
     graphics::{CursorKind, Rect},
+    info::Info,
     input::KeyEvent,
     theme::{self, Theme},
     tree::{self, Tree},
@@ -243,6 +244,7 @@ pub struct Editor {
     pub theme_loader: Arc<theme::Loader>,
 
     pub status_msg: Option<(String, Severity)>,
+    pub autoinfo: Option<Info>,
 
     pub config: Config,
 
@@ -286,6 +288,7 @@ impl Editor {
             registers: Registers::default(),
             clipboard_provider: get_clipboard_provider(),
             status_msg: None,
+            autoinfo: None,
             idle_timer: Box::pin(sleep(config.idle_timeout)),
             last_motion: None,
             config,

helix-view/src/info.rs

@@ -1,5 +1,5 @@
 use crate::input::KeyEvent;
-use helix_core::unicode::width::UnicodeWidthStr;
+use helix_core::{register::Registers, unicode::width::UnicodeWidthStr};
 use std::{collections::BTreeSet, fmt::Write};
 
 #[derive(Debug)]
@@ -16,26 +16,21 @@ pub struct Info {
 }
 
 impl Info {
-    pub fn new(title: &str, body: Vec<(&str, BTreeSet<KeyEvent>)>) -> Self {
-        let body = body
-            .into_iter()
-            .map(|(desc, events)| {
-                let events = events.iter().map(ToString::to_string).collect::<Vec<_>>();
-                (desc, events.join(", "))
-            })
-            .collect::<Vec<_>>();
+    pub fn new(title: &str, body: Vec<(String, String)>) -> Self {
+        if body.is_empty() {
+            return Self {
+                title: title.to_string(),
+                height: 1,
+                width: title.len() as u16,
+                text: "".to_string(),
+            };
+        }
 
-        let keymaps_width = body.iter().map(|r| r.1.len()).max().unwrap();
+        let item_width = body.iter().map(|(item, _)| item.width()).max().unwrap();
         let mut text = String::new();
 
-        for (desc, keyevents) in &body {
-            let _ = writeln!(
-                text,
-                "{:width$}  {}",
-                keyevents,
-                desc,
-                width = keymaps_width
-            );
+        for (item, desc) in &body {
+            let _ = writeln!(text, "{:width$}  {}", item, desc, width = item_width);
         }
 
         Self {
@@ -45,4 +40,36 @@ impl Info {
             text,
         }
     }
+
+    pub fn from_keymap(title: &str, body: Vec<(&str, BTreeSet<KeyEvent>)>) -> Self {
+        let body = body
+            .into_iter()
+            .map(|(desc, events)| {
+                let events = events.iter().map(ToString::to_string).collect::<Vec<_>>();
+                (events.join(", "), desc.to_string())
+            })
+            .collect();
+
+        Self::new(title, body)
+    }
+
+    pub fn from_registers(registers: &Registers) -> Self {
+        let body = registers
+            .inner()
+            .iter()
+            .map(|(ch, reg)| {
+                let content = reg
+                    .read()
+                    .get(0)
+                    .and_then(|s| s.lines().next())
+                    .map(String::from)
+                    .unwrap_or_default();
+                (ch.to_string(), content)
+            })
+            .collect();
+
+        let mut infobox = Self::new("Registers", body);
+        infobox.width = 30; // copied content could be very long
+        infobox
+    }
 }