reactor help: move event handling closer to where it belongs

src/interactive/app/eventloop.rs

@@ -1,7 +1,7 @@
 use crate::interactive::{
     sorted_entries,
     widgets::{MainWindow, MainWindowProps},
-    ByteVisualization, CursorDirection, DisplayOptions, EntryDataBundle, SortMode,
+    ByteVisualization, CursorDirection, DisplayOptions, EntryDataBundle, Handle, SortMode,
 };
 use dua::{
     traverse::{Traversal, TreeIndex},
@@ -85,7 +85,7 @@ impl TerminalApp {
         B: Backend,
         R: io::Read + TermReadEventsAndRaw,
     {
-        use termion::event::Key::{Backspace, Char, Ctrl, Down, Esc, PageDown, PageUp, Up};
+        use termion::event::Key::{Backspace, Char, Ctrl, Esc};
         use FocussedPane::*;
 
         self.draw(terminal)?;
@@ -110,13 +110,13 @@ impl TerminalApp {
 
             match self.state.focussed {
                 FocussedPane::Mark => {}
-                FocussedPane::Help => match key {
-                    Ctrl('u') | PageUp => self.scroll_help(CursorDirection::PageUp),
-                    Char('k') | Up => self.scroll_help(CursorDirection::Up),
-                    Char('j') | Down => self.scroll_help(CursorDirection::Down),
-                    Ctrl('d') | PageDown => self.scroll_help(CursorDirection::PageDown),
-                    _ => {}
-                },
+                FocussedPane::Help => {
+                    self.window
+                        .help_pane
+                        .as_mut()
+                        .expect("help window")
+                        .key(key);
+                }
                 FocussedPane::Main => match key {
                     Char('O') => self.open_that(),
                     Char(' ') => self.mark_entry(false),

src/interactive/app/handlers.rs

@@ -100,13 +100,6 @@ impl TerminalApp {
             }
         }
     }
-
-    pub fn scroll_help(&mut self, direction: CursorDirection) {
-        if let Some(ref mut pane) = self.window.help_pane {
-            pane.scroll = direction.move_cursor(pane.scroll as usize) as u16;
-        }
-    }
-
     pub fn change_entry_selection(&mut self, direction: CursorDirection) {
         let entries = sorted_entries(&self.traversal.tree, self.state.root, self.state.sorting);
         let next_selected_pos = match self.state.selected {

src/interactive/common.rs

@@ -0,0 +1,5 @@
+use termion::event::Key;
+
+pub trait Handle {
+    fn key(&mut self, key: Key);
+}

src/interactive/mod.rs

@@ -1,7 +1,9 @@
 mod app;
+mod common;
 pub mod widgets;
 
 pub use self::app::*;
+pub use common::*;
 
 #[cfg(test)]
 mod app_test;

src/interactive/widgets/help.rs

@@ -1,9 +1,12 @@
+use crate::interactive::{CursorDirection, Handle};
 use std::borrow::Borrow;
 use std::cell::{Cell, RefCell};
-use tui::style::Color;
+use termion::event::Key;
+use termion::event::Key::*;
 use tui::{
     buffer::Buffer,
     layout::Rect,
+    style::Color,
     style::{Modifier, Style},
     widgets::{Block, Borders, Paragraph, Text, Widget},
 };
@@ -17,7 +20,23 @@ pub struct HelpPaneProps {
     pub border_style: Style,
 }
 
+impl Handle for HelpPane {
+    fn key(&mut self, key: Key) {
+        match key {
+            Ctrl('u') | PageUp => self.scroll_help(CursorDirection::PageUp),
+            Char('k') | Up => self.scroll_help(CursorDirection::Up),
+            Char('j') | Down => self.scroll_help(CursorDirection::Down),
+            Ctrl('d') | PageDown => self.scroll_help(CursorDirection::PageDown),
+            _ => {}
+        };
+    }
+}
+
 impl HelpPane {
+    fn scroll_help(&mut self, direction: CursorDirection) {
+        self.scroll = direction.move_cursor(self.scroll as usize) as u16;
+    }
+
     pub fn render(&mut self, props: impl Borrow<HelpPaneProps>, area: Rect, buf: &mut Buffer) {
         let (texts, num_lines) = {
             let num_lines = Cell::new(0u16);

src/interactive/widgets/mark.rs

@@ -1,10 +1,9 @@
-use crate::interactive::EntryMarkMap;
+use crate::interactive::{widgets::COLOR_MARKED_LIGHT, EntryMarkMap};
 use dua::traverse::TreeIndex;
 use itertools::Itertools;
 use std::borrow::Borrow;
 use tui::{
-    buffer::Buffer, layout::Rect, style::Color, style::Style, widgets::Block, widgets::Borders,
-    widgets::Text,
+    buffer::Buffer, layout::Rect, style::Style, widgets::Block, widgets::Borders, widgets::Text,
 };
 use tui_react::{List, ListProps};
 
@@ -47,7 +46,7 @@ impl MarkPane {
             let name = Text::Styled(
                 v.path.to_string_lossy(),
                 Style {
-                    fg: Color::LightRed,
+                    fg: COLOR_MARKED_LIGHT,
                     ..Style::default()
                 },
             );