Add custom event type replacing crossterm's Event (#3169)

Ported over from 61365dfbf3 in the `gui` branch. This will allow
adding our own events, most notably an idle timer event (useful
for adding debounced input in [dynamic pickers][1] used by interactive
global search and workspace symbols).

[1]: https://github.com/helix-editor/helix/pull/3110

Co-authored-by: Blaž Hrastnik <blaz@mxxn.io>

7 files changed, 22 insertions, 26 deletions

diff --git a/helix-term/src/ui/completion.rs b/helix-term/src/ui/completion.rs
index c1816db1..6a743632 100644
--- a/helix-term/src/ui/completion.rs
+++ b/helix-term/src/ui/completion.rs
@@ -1,5 +1,4 @@
-use crate::compositor::{Component, Context, EventResult};
-use crossterm::event::{Event, KeyCode, KeyEvent};
+use crate::compositor::{Component, Context, Event, EventResult};
 use helix_view::editor::CompleteAction;
 use tui::buffer::Buffer as Surface;
 use tui::text::Spans;
@@ -7,7 +6,11 @@ use tui::text::Spans;
 use std::borrow::Cow;
 
 use helix_core::{Change, Transaction};
-use helix_view::{graphics::Rect, Document, Editor};
+use helix_view::{
+    graphics::Rect,
+    input::{KeyCode, KeyEvent},
+    Document, Editor,
+};
 
 use crate::commands;
 use crate::ui::{menu, Markdown, Menu, Popup, PromptEvent};
diff --git a/helix-term/src/ui/editor.rs b/helix-term/src/ui/editor.rs
index 6b316374..401d284e 100644
--- a/helix-term/src/ui/editor.rs
+++ b/helix-term/src/ui/editor.rs
@@ -1,6 +1,6 @@
 use crate::{
     commands,
-    compositor::{Component, Context, EventResult},
+    compositor::{Component, Context, Event, EventResult},
     job, key,
     keymap::{KeymapResult, Keymaps},
     ui::{Completion, ProgressSpinners},
@@ -19,13 +19,12 @@ use helix_view::{
     document::Mode,
     editor::{CompleteAction, CursorShapeConfig},
     graphics::{Color, CursorKind, Modifier, Rect, Style},
-    input::KeyEvent,
+    input::{KeyEvent, MouseButton, MouseEvent, MouseEventKind},
     keyboard::{KeyCode, KeyModifiers},
     Document, Editor, Theme, View,
 };
 use std::borrow::Cow;
 
-use crossterm::event::{Event, MouseButton, MouseEvent, MouseEventKind};
 use tui::buffer::Buffer as Surface;
 
 use super::lsp::SignatureHelp;
@@ -966,7 +965,7 @@ impl EditorView {
                 if let Some((pos, view_id)) = pos_and_view(editor, row, column) {
                     let doc = editor.document_mut(editor.tree.get(view_id).doc).unwrap();
 
-                    if modifiers == crossterm::event::KeyModifiers::ALT {
+                    if modifiers == KeyModifiers::ALT {
                         let selection = doc.selection(view_id).clone();
                         doc.set_selection(view_id, selection.push(Range::point(pos)));
                     } else {
@@ -1068,7 +1067,7 @@ impl EditorView {
                     let line = coords.row + view.offset.row;
                     if let Ok(pos) = doc.text().try_line_to_char(line) {
                         doc.set_selection(view_id, Selection::point(pos));
-                        if modifiers == crossterm::event::KeyModifiers::ALT {
+                        if modifiers == KeyModifiers::ALT {
                             commands::MappableCommand::dap_edit_log.execute(cxt);
                         } else {
                             commands::MappableCommand::dap_edit_condition.execute(cxt);
@@ -1087,7 +1086,7 @@ impl EditorView {
                     return EventResult::Ignored(None);
                 }
 
-                if modifiers == crossterm::event::KeyModifiers::ALT {
+                if modifiers == KeyModifiers::ALT {
                     commands::MappableCommand::replace_selections_with_primary_clipboard
                         .execute(cxt);
 
@@ -1132,9 +1131,8 @@ impl Component for EditorView {
                 // Handling it here but not re-rendering will cause flashing
                 EventResult::Consumed(None)
             }
-            Event::Key(key) => {
+            Event::Key(mut key) => {
                 cx.editor.reset_idle_timer();
-                let mut key = KeyEvent::from(key);
                 canonicalize_key(&mut key);
 
                 // clear status
diff --git a/helix-term/src/ui/menu.rs b/helix-term/src/ui/menu.rs
index 6bb64139..ce51ecbc 100644
--- a/helix-term/src/ui/menu.rs
+++ b/helix-term/src/ui/menu.rs
@@ -1,10 +1,9 @@
 use std::{borrow::Cow, path::PathBuf};
 
 use crate::{
-    compositor::{Callback, Component, Compositor, Context, EventResult},
+    compositor::{Callback, Component, Compositor, Context, Event, EventResult},
     ctrl, key, shift,
 };
-use crossterm::event::Event;
 use tui::{buffer::Buffer as Surface, text::Spans, widgets::Table};
 
 pub use tui::widgets::{Cell, Row};
@@ -237,7 +236,7 @@ impl<T: Item + 'static> Component for Menu<T> {
             compositor.pop();
         }));
 
-        match event.into() {
+        match event {
             // esc or ctrl-c aborts the completion and closes the menu
             key!(Esc) | ctrl!('c') => {
                 (self.callback_fn)(cx.editor, self.selection(), MenuEvent::Abort);
diff --git a/helix-term/src/ui/overlay.rs b/helix-term/src/ui/overlay.rs
index 9f522e35..1cd60be5 100644
--- a/helix-term/src/ui/overlay.rs
+++ b/helix-term/src/ui/overlay.rs
@@ -1,4 +1,3 @@
-use crossterm::event::Event;
 use helix_core::Position;
 use helix_view::{
     graphics::{CursorKind, Rect},
@@ -6,7 +5,7 @@ use helix_view::{
 };
 use tui::buffer::Buffer;
 
-use crate::compositor::{Component, Context, EventResult};
+use crate::compositor::{Component, Context, Event, EventResult};
 
 /// Contains a component placed in the center of the parent component
 pub struct Overlay<T> {
diff --git a/helix-term/src/ui/picker.rs b/helix-term/src/ui/picker.rs
index 9707c81e..169aeadd 100644
--- a/helix-term/src/ui/picker.rs
+++ b/helix-term/src/ui/picker.rs
@@ -1,9 +1,8 @@
 use crate::{
-    compositor::{Component, Compositor, Context, EventResult},
+    compositor::{Component, Compositor, Context, Event, EventResult},
     ctrl, key, shift,
     ui::{self, EditorView},
 };
-use crossterm::event::Event;
 use tui::{
     buffer::Buffer as Surface,
     widgets::{Block, BorderType, Borders},
@@ -502,7 +501,7 @@ impl<T: Item + 'static> Component for Picker<T> {
             compositor.last_picker = compositor.pop();
         })));
 
-        match key_event.into() {
+        match key_event {
             shift!(Tab) | key!(Up) | ctrl!('p') => {
                 self.move_by(1, Direction::Backward);
             }
diff --git a/helix-term/src/ui/popup.rs b/helix-term/src/ui/popup.rs
index 77ab2462..af8e53c5 100644
--- a/helix-term/src/ui/popup.rs
+++ b/helix-term/src/ui/popup.rs
@@ -1,9 +1,8 @@
 use crate::{
     commands::Open,
-    compositor::{Callback, Component, Context, EventResult},
+    compositor::{Callback, Component, Context, Event, EventResult},
     ctrl, key,
 };
-use crossterm::event::Event;
 use tui::buffer::Buffer as Surface;
 
 use helix_core::Position;
@@ -149,7 +148,7 @@ impl<T: Component> Component for Popup<T> {
             _ => return EventResult::Ignored(None),
         };
 
-        if key!(Esc) == key.into() && self.ignore_escape_key {
+        if key!(Esc) == key && self.ignore_escape_key {
             return EventResult::Ignored(None);
         }
 
@@ -158,7 +157,7 @@ impl<T: Component> Component for Popup<T> {
             compositor.remove(self.id.as_ref());
         });
 
-        match key.into() {
+        match key {
             // esc or ctrl-c aborts the completion and closes the menu
             key!(Esc) | ctrl!('c') => {
                 let _ = self.contents.handle_event(event, cx);
diff --git a/helix-term/src/ui/prompt.rs b/helix-term/src/ui/prompt.rs
index 03920a53..4cb38fb0 100644
--- a/helix-term/src/ui/prompt.rs
+++ b/helix-term/src/ui/prompt.rs
@@ -1,6 +1,5 @@
-use crate::compositor::{Component, Compositor, Context, EventResult};
+use crate::compositor::{Component, Compositor, Context, Event, EventResult};
 use crate::{alt, ctrl, key, shift, ui};
-use crossterm::event::Event;
 use helix_view::input::KeyEvent;
 use helix_view::keyboard::KeyCode;
 use std::{borrow::Cow, ops::RangeFrom};
@@ -479,7 +478,7 @@ impl Component for Prompt {
             compositor.pop();
         })));
 
-        match event.into() {
+        match event {
             ctrl!('c') | key!(Esc) => {
                 (self.callback_fn)(cx, &self.line, PromptEvent::Abort);
                 return close_fn;