Display more data in completion popups.

2 files changed, 157 insertions, 102 deletions

diff --git a/helix-term/src/ui/completion.rs b/helix-term/src/ui/completion.rs
index 719daa0f..f79c2235 100644
--- a/helix-term/src/ui/completion.rs
+++ b/helix-term/src/ui/completion.rs
@@ -12,11 +12,63 @@ use helix_core::{Position, Transaction};
 use helix_view::Editor;
 
 use crate::commands;
-use crate::ui::{Markdown, Menu, Popup, PromptEvent};
+use crate::ui::{menu, Markdown, Menu, Popup, PromptEvent};
 
 use helix_lsp::lsp;
 use lsp::CompletionItem;
 
+impl menu::Item for CompletionItem {
+    fn filter_text(&self) -> &str {
+        self.filter_text
+            .as_ref()
+            .unwrap_or_else(|| &self.label)
+            .as_str()
+    }
+
+    fn label(&self) -> &str {
+        self.label.as_str()
+    }
+
+    fn row(&self) -> menu::Row {
+        menu::Row::new(vec![
+            menu::Cell::from(self.label.as_str()),
+            menu::Cell::from(match self.kind {
+                Some(lsp::CompletionItemKind::Text) => "text",
+                Some(lsp::CompletionItemKind::Method) => "method",
+                Some(lsp::CompletionItemKind::Function) => "function",
+                Some(lsp::CompletionItemKind::Constructor) => "constructor",
+                Some(lsp::CompletionItemKind::Field) => "field",
+                Some(lsp::CompletionItemKind::Variable) => "variable",
+                Some(lsp::CompletionItemKind::Class) => "class",
+                Some(lsp::CompletionItemKind::Interface) => "interface",
+                Some(lsp::CompletionItemKind::Module) => "module",
+                Some(lsp::CompletionItemKind::Property) => "property",
+                Some(lsp::CompletionItemKind::Unit) => "unit",
+                Some(lsp::CompletionItemKind::Value) => "value",
+                Some(lsp::CompletionItemKind::Enum) => "enum",
+                Some(lsp::CompletionItemKind::Keyword) => "keyword",
+                Some(lsp::CompletionItemKind::Snippet) => "snippet",
+                Some(lsp::CompletionItemKind::Color) => "color",
+                Some(lsp::CompletionItemKind::File) => "file",
+                Some(lsp::CompletionItemKind::Reference) => "reference",
+                Some(lsp::CompletionItemKind::Folder) => "folder",
+                Some(lsp::CompletionItemKind::EnumMember) => "enum_member",
+                Some(lsp::CompletionItemKind::Constant) => "constant",
+                Some(lsp::CompletionItemKind::Struct) => "struct",
+                Some(lsp::CompletionItemKind::Event) => "event",
+                Some(lsp::CompletionItemKind::Operator) => "operator",
+                Some(lsp::CompletionItemKind::TypeParameter) => "type_param",
+                None => "",
+            }),
+            // self.detail.as_deref().unwrap_or("")
+            // self.label_details
+            //     .as_ref()
+            //     .or(self.detail())
+            //     .as_str(),
+        ])
+    }
+}
+
 /// Wraps a Menu.
 pub struct Completion {
     popup: Popup<Menu<CompletionItem>>, // TODO: Popup<Menu> need to be able to access contents.
@@ -31,92 +83,83 @@ impl Completion {
         trigger_offset: usize,
     ) -> Self {
         // let items: Vec<CompletionItem> = Vec::new();
-        let mut menu = Menu::new(
-            items,
-            |item| {
-                // format_fn
-                item.label.as_str().into()
-
-                // TODO: use item.filter_text for filtering
-            },
-            move |editor: &mut Editor, item, event| {
-                match event {
-                    PromptEvent::Abort => {
-                        // revert state
-                        // let id = editor.view().doc;
-                        // let doc = &mut editor.documents[id];
-                        // doc.state = snapshot.clone();
-                    }
-                    PromptEvent::Validate => {
-                        let (view, doc) = editor.current();
-
-                        // revert state to what it was before the last update
-                        // doc.state = snapshot.clone();
-
-                        // extract as fn(doc, item):
-
-                        // TODO: need to apply without composing state...
-                        // TODO: need to update lsp on accept/cancel by diffing the snapshot with
-                        // the final state?
-                        // -> on update simply update the snapshot, then on accept redo the call,
-                        // finally updating doc.changes + notifying lsp.
-                        //
-                        // or we could simply use doc.undo + apply when changing between options
-
-                        // always present here
-                        let item = item.unwrap();
-
-                        use helix_lsp::{lsp, util};
-                        // determine what to insert: text_edit | insert_text | label
-                        let edit = if let Some(edit) = &item.text_edit {
-                            match edit {
-                                lsp::CompletionTextEdit::Edit(edit) => edit.clone(),
-                                lsp::CompletionTextEdit::InsertAndReplace(item) => {
-                                    unimplemented!("completion: insert_and_replace {:?}", item)
-                                }
+        let mut menu = Menu::new(items, move |editor: &mut Editor, item, event| {
+            match event {
+                PromptEvent::Abort => {
+                    // revert state
+                    // let id = editor.view().doc;
+                    // let doc = &mut editor.documents[id];
+                    // doc.state = snapshot.clone();
+                }
+                PromptEvent::Validate => {
+                    let (view, doc) = editor.current();
+
+                    // revert state to what it was before the last update
+                    // doc.state = snapshot.clone();
+
+                    // extract as fn(doc, item):
+
+                    // TODO: need to apply without composing state...
+                    // TODO: need to update lsp on accept/cancel by diffing the snapshot with
+                    // the final state?
+                    // -> on update simply update the snapshot, then on accept redo the call,
+                    // finally updating doc.changes + notifying lsp.
+                    //
+                    // or we could simply use doc.undo + apply when changing between options
+
+                    // always present here
+                    let item = item.unwrap();
+
+                    use helix_lsp::{lsp, util};
+                    // determine what to insert: text_edit | insert_text | label
+                    let edit = if let Some(edit) = &item.text_edit {
+                        match edit {
+                            lsp::CompletionTextEdit::Edit(edit) => edit.clone(),
+                            lsp::CompletionTextEdit::InsertAndReplace(item) => {
+                                unimplemented!("completion: insert_and_replace {:?}", item)
                             }
-                        } else {
-                            item.insert_text.as_ref().unwrap_or(&item.label);
-                            unimplemented!();
-                            // lsp::TextEdit::new(); TODO: calculate a TextEdit from insert_text
-                            // and we insert at position.
-                        };
-
-                        // if more text was entered, remove it
-                        let cursor = doc.selection(view.id).cursor();
-                        if trigger_offset < cursor {
-                            let remove = Transaction::change(
-                                doc.text(),
-                                vec![(trigger_offset, cursor, None)].into_iter(),
-                            );
-                            doc.apply(&remove, view.id);
                         }
+                    } else {
+                        item.insert_text.as_ref().unwrap_or(&item.label);
+                        unimplemented!();
+                        // lsp::TextEdit::new(); TODO: calculate a TextEdit from insert_text
+                        // and we insert at position.
+                    };
 
-                        use helix_lsp::OffsetEncoding;
-                        let transaction = util::generate_transaction_from_edits(
+                    // if more text was entered, remove it
+                    let cursor = doc.selection(view.id).cursor();
+                    if trigger_offset < cursor {
+                        let remove = Transaction::change(
                             doc.text(),
-                            vec![edit],
-                            offset_encoding, // TODO: should probably transcode in Client
+                            vec![(trigger_offset, cursor, None)].into_iter(),
                         );
-                        doc.apply(&transaction, view.id);
-
-                        // TODO: merge edit with additional_text_edits
-                        if let Some(additional_edits) = &item.additional_text_edits {
-                            // gopls uses this to add extra imports
-                            if !additional_edits.is_empty() {
-                                let transaction = util::generate_transaction_from_edits(
-                                    doc.text(),
-                                    additional_edits.clone(),
-                                    offset_encoding, // TODO: should probably transcode in Client
-                                );
-                                doc.apply(&transaction, view.id);
-                            }
+                        doc.apply(&remove, view.id);
+                    }
+
+                    use helix_lsp::OffsetEncoding;
+                    let transaction = util::generate_transaction_from_edits(
+                        doc.text(),
+                        vec![edit],
+                        offset_encoding, // TODO: should probably transcode in Client
+                    );
+                    doc.apply(&transaction, view.id);
+
+                    // TODO: merge edit with additional_text_edits
+                    if let Some(additional_edits) = &item.additional_text_edits {
+                        // gopls uses this to add extra imports
+                        if !additional_edits.is_empty() {
+                            let transaction = util::generate_transaction_from_edits(
+                                doc.text(),
+                                additional_edits.clone(),
+                                offset_encoding, // TODO: should probably transcode in Client
+                            );
+                            doc.apply(&transaction, view.id);
                         }
                     }
-                    _ => (),
-                };
-            },
-        );
+                }
+                _ => (),
+            };
+        });
         let popup = Popup::new(menu);
         Self {
             popup,
diff --git a/helix-term/src/ui/menu.rs b/helix-term/src/ui/menu.rs
index c771bc65..893c75e7 100644
--- a/helix-term/src/ui/menu.rs
+++ b/helix-term/src/ui/menu.rs
@@ -4,8 +4,11 @@ use tui::{
     buffer::Buffer as Surface,
     layout::Rect,
     style::{Color, Style},
+    widgets::Table,
 };
 
+pub use tui::widgets::{Cell, Row};
+
 use std::borrow::Cow;
 
 use fuzzy_matcher::skim::SkimMatcherV2 as Matcher;
@@ -14,7 +17,15 @@ use fuzzy_matcher::FuzzyMatcher;
 use helix_core::Position;
 use helix_view::Editor;
 
-pub struct Menu<T> {
+pub trait Item {
+    // TODO: sort_text
+    fn filter_text(&self) -> &str;
+
+    fn label(&self) -> &str;
+    fn row(&self) -> Row;
+}
+
+pub struct Menu<T: Item> {
     options: Vec<T>,
 
     cursor: Option<usize>,
@@ -23,19 +34,17 @@ pub struct Menu<T> {
     /// (index, score)
     matches: Vec<(usize, i64)>,
 
-    format_fn: Box<dyn Fn(&T) -> Cow<str>>,
     callback_fn: Box<dyn Fn(&mut Editor, Option<&T>, MenuEvent)>,
 
     scroll: usize,
     size: (u16, u16),
 }
 
-impl<T> Menu<T> {
+impl<T: Item> Menu<T> {
     // TODO: it's like a slimmed down picker, share code? (picker = menu + prompt with different
     // rendering)
     pub fn new(
         options: Vec<T>,
-        format_fn: impl Fn(&T) -> Cow<str> + 'static,
         callback_fn: impl Fn(&mut Editor, Option<&T>, MenuEvent) + 'static,
     ) -> Self {
         let mut menu = Self {
@@ -43,7 +52,6 @@ impl<T> Menu<T> {
             matcher: Box::new(Matcher::default()),
             matches: Vec::new(),
             cursor: None,
-            format_fn: Box::new(format_fn),
             callback_fn: Box::new(callback_fn),
             scroll: 0,
             size: (0, 0),
@@ -61,7 +69,6 @@ impl<T> Menu<T> {
             ref mut options,
             ref mut matcher,
             ref mut matches,
-            ref format_fn,
             ..
         } = *self;
 
@@ -72,8 +79,7 @@ impl<T> Menu<T> {
                 .iter()
                 .enumerate()
                 .filter_map(|(index, option)| {
-                    // TODO: maybe using format_fn isn't the best idea here
-                    let text = (format_fn)(option);
+                    let text = option.filter_text();
                     // TODO: using fuzzy_indices could give us the char idx for match highlighting
                     matcher
                         .fuzzy_match(&text, pattern)
@@ -134,7 +140,7 @@ impl<T> Menu<T> {
 
 use super::PromptEvent as MenuEvent;
 
-impl<T: 'static> Component for Menu<T> {
+impl<T: Item + 'static> Component for Menu<T> {
     fn handle_event(&mut self, event: Event, cx: &mut Context) -> EventResult {
         let event = match event {
             Event::Key(event) => event,
@@ -264,20 +270,26 @@ impl<T: 'static> Component for Menu<T> {
         let scroll_line = (win_height - scroll_height) * scroll
             / std::cmp::max(1, len.saturating_sub(win_height));
 
-        for (i, option) in options[scroll..(scroll + win_height).min(len)]
-            .iter()
-            .enumerate()
-        {
-            let line = Some(i + scroll);
-            // TODO: set bg for the whole row if selected
-            surface.set_stringn(
-                area.x,
-                area.y + i as u16,
-                (self.format_fn)(option),
-                area.width as usize - 1,
-                if line == self.cursor { selected } else { style },
-            );
+        use tui::layout::Constraint;
+        let rows = options.iter().map(|option| option.row());
+        let table = Table::new(rows)
+            .style(style)
+            .highlight_style(selected)
+            .column_spacing(1)
+            .widths(&[Constraint::Percentage(50), Constraint::Percentage(50)]);
+
+        use tui::widgets::TableState;
+
+        table.render_table(
+            area,
+            surface,
+            &mut TableState {
+                offset: scroll,
+                selected: self.cursor,
+            },
+        );
 
+        for (i, option) in (scroll..(scroll + win_height).min(len)).enumerate() {
             let is_marked = i >= scroll_line && i < scroll_line + scroll_height;
 
             if is_marked {