feature: add spacebar shortcut to toggle process tree nodes (#1830)

* feature: added spacebar as a toggle for proc tree mode

* bug: added check if the app is currently in search widget state

* refactor: moved the if statements inside the match case

* docs: added documentation for Spaec as tree toggle

* revert: changes

* feat: added space key to toggle tree

* refactor: clippy errors

* docs: updated documentation for space as toggle

* feat: experimental change to Minus, collapse entire tree

* fix: clippy errors

* feat: finished - and + as full tree collapse/expand

* refactor: clippy errors

* Made the all collapse function more concise

* Changed i32 calls to Pid

* updated help text

* Fixed array

* reverted total collapse and expand of trees

* array fix

docs/content/usage/widgets/process.md

@@ -101,7 +101,7 @@ Pressing ++t++ or ++f5++ in the table toggles tree mode in the process widget, d
 
 A process in tree mode can also be "collapsed", hiding its children and any descendants, using the either the ++minus++,
 ++plus++, or ++left++ keys, or clicking on an entry. It can be expanded by using the ++minus++, ++plus++, or ++right++
-keys, or by clicking on the entry again.
+keys, or by clicking on the entry again. The ++space++ key can also be used to toggle between the collapsed and expanded states.
 
 !!! info
 

src/app.rs

@@ -684,6 +684,23 @@ impl App {
         }
     }
 
+    pub fn on_space_key(&mut self) {
+        if !self.is_in_dialog() {
+            if self.current_widget.widget_type == BottomWidgetType::Proc {
+                if let Some(proc_widget_state) = self
+                    .states
+                    .proc_state
+                    .get_mut_widget_state(self.current_widget.widget_id)
+                {
+                    proc_widget_state.toggle_current_tree_branch_entry();
+                }
+            }
+        } else if self.process_kill_dialog.is_open() {
+            // Either select the current option,
+            // or scroll to the next one
+        }
+    }
+
     pub fn on_page_up(&mut self) {
         if self.process_kill_dialog.is_open() {
             self.process_kill_dialog.on_page_up();

src/constants.rs

@@ -63,25 +63,25 @@ const CPU_HELP_TEXT: [&str; 2] = [
 
 const PROCESS_HELP_TEXT: [&str; 20] = [
     "3 - Process widget",
-    "dd, F9, Delete       Kill the selected process",
-    "c                    Sort by CPU usage, press again to reverse",
-    "m                    Sort by memory usage, press again to reverse",
-    "p                    Sort by PID name, press again to reverse",
-    "n                    Sort by process name, press again to reverse",
-    "Tab                  Group/un-group processes with the same name",
-    "Ctrl-f, /            Open process search widget",
-    "P                    Toggle between showing the full command or just the process name",
-    "s, F6                Open process sort widget",
-    "I                    Invert current sort",
-    "%                    Toggle between values and percentages for memory usage",
-    "t, F5                Toggle tree mode",
-    "Right                Collapse a branch while in tree mode",
-    "Left                 Expand a branch while in tree mode",
-    "+, -, click          Toggle whether a branch is expanded or collapsed in tree mode",
-    "click on header      Sorts the entries by that column, click again to invert the sort",
-    "C                    Sort by GPU usage, press again to reverse",
-    "M                    Sort by GPU memory usage, press again to reverse",
-    "z                    Toggle the display of kernel threads",
+    "dd, F9, Delete          Kill the selected process",
+    "c                       Sort by CPU usage, press again to reverse",
+    "m                       Sort by memory usage, press again to reverse",
+    "p                       Sort by PID name, press again to reverse",
+    "n                       Sort by process name, press again to reverse",
+    "Tab                     Group/un-group processes with the same name",
+    "Ctrl-f, /               Open process search widget",
+    "P                       Toggle between showing the full command or just the process name",
+    "s, F6                   Open process sort widget",
+    "I                       Invert current sort",
+    "%                       Toggle between values and percentages for memory usage",
+    "t, F5                   Toggle tree mode",
+    "Right                   Collapse a branch while in tree mode",
+    "Left                    Expand a branch while in tree mode",
+    "+, -, click, Space      Toggle whether a branch is expanded or collapsed in tree mode",
+    "click on header         Sorts the entries by that column, click again to invert the sort",
+    "C                       Sort by GPU usage, press again to reverse",
+    "M                       Sort by GPU memory usage, press again to reverse",
+    "z                       Toggle the display of kernel threads",
 ];
 
 const SEARCH_HELP_TEXT: [&str; 51] = [

src/event.rs

@@ -56,17 +56,15 @@ pub fn handle_key_event_or_break(
     // c_debug!("KeyEvent: {event:?}");
 
     if event.modifiers.is_empty() {
-        // Required catch for searching - otherwise you couldn't search with q.
-        if event.code == KeyCode::Char('q') && !app.is_in_search_widget() {
-            return true;
-        }
         match event.code {
+            KeyCode::Char('q') if !app.is_in_search_widget() => return true,
             KeyCode::End => app.skip_to_last(),
             KeyCode::Home => app.skip_to_first(),
             KeyCode::Up => app.on_up_key(),
             KeyCode::Down => app.on_down_key(),
             KeyCode::Left => app.on_left_key(),
             KeyCode::Right => app.on_right_key(),
+            KeyCode::Char(' ') if !app.is_in_search_widget() => app.on_space_key(),
             KeyCode::Char(caught_char) => app.on_char_key(caught_char),
             KeyCode::Esc => app.on_esc(),
             KeyCode::Enter => app.on_enter(),