First half-baked version of deletion within traversal tree

No size handling for now

3 files changed, 33 insertions, 5 deletions

diff --git a/src/interactive/app/handlers.rs b/src/interactive/app/handlers.rs
index e9054aa..aed749f 100644
--- a/src/interactive/app/handlers.rs
+++ b/src/interactive/app/handlers.rs
@@ -6,6 +6,7 @@ use crate::interactive::{
 };
 use dua::traverse::TreeIndex;
 use itertools::Itertools;
+use petgraph::visit::Bfs;
 use petgraph::Direction;
 use termion::event::Key;
 use tui::backend::Backend;
@@ -148,7 +149,30 @@ impl TerminalApp {
         }
     }
 
-    pub fn delete_entry(&mut self, _index: TreeIndex) -> Result<(), usize> {
+    fn set_root(&mut self, root: TreeIndex) {
+        self.state.root = root;
+        self.state.entries = sorted_entries(&self.traversal.tree, root, self.state.sorting);
+    }
+
+    pub fn delete_entry(&mut self, index: TreeIndex) -> Result<(), usize> {
+        if let Some(_entry) = self.traversal.tree.node_weight(index) {
+            let mut bfs = Bfs::new(&self.traversal.tree, index);
+            while let Some(nx) = bfs.next(&self.traversal.tree) {
+                self.traversal.tree.remove_node(nx);
+            }
+            self.state.entries =
+                sorted_entries(&self.traversal.tree, self.state.root, self.state.sorting);
+            if let None = self.traversal.tree.node_weight(self.state.root) {
+                self.set_root(self.traversal.root_index);
+            }
+            if let None = self
+                .state
+                .selected
+                .and_then(|selected| self.state.entries.iter().find(|e| e.index == selected))
+            {
+                self.state.selected = self.state.entries.get(0).map(|e| e.index);
+            }
+        }
         Ok(())
     }
 
diff --git a/src/interactive/widgets/help.rs b/src/interactive/widgets/help.rs
index 26d659b..2b855ec 100644
--- a/src/interactive/widgets/help.rs
+++ b/src/interactive/widgets/help.rs
@@ -146,7 +146,7 @@ impl HelpPane {
             {
                 hotkey("d/<space>", "remove the selected entry from the list", None);
                 hotkey(
-                    "Ctrl + R",
+                    "Ctrl + r",
                     "Permanently delete all marked entries without prompt!",
                     Some("This operation cannot be undone!"),
                 );
diff --git a/src/interactive/widgets/mark.rs b/src/interactive/widgets/mark.rs
index 688a48a..611dec0 100644
--- a/src/interactive/widgets/mark.rs
+++ b/src/interactive/widgets/mark.rs
@@ -92,7 +92,7 @@ impl MarkPane {
     pub fn key(mut self, key: Key) -> Option<(Self, Option<MarkMode>)> {
         let action = None;
         match key {
-            Ctrl('R') => return self.prepare_deletion(),
+            Ctrl('r') => return self.prepare_deletion(),
             Char('d') | Char(' ') => return self.remove_selected().map(|s| (s, action)),
             Ctrl('u') | PageUp => self.change_selection(CursorDirection::PageUp),
             Char('k') | Up => self.change_selection(CursorDirection::Up),
@@ -134,7 +134,11 @@ impl MarkPane {
             d.num_errors_during_deletion = num_errors;
         }
     }
-    fn prepare_deletion(self) -> Option<(Self, Option<MarkMode>)> {
+    fn prepare_deletion(mut self) -> Option<(Self, Option<MarkMode>)> {
+        for entry in self.marked.values_mut() {
+            entry.num_errors_during_deletion = 0;
+        }
+        self.selected = Some(0);
         Some((self, Some(MarkMode::Delete)))
     }
     fn remove_selected(mut self) -> Option<Self> {
@@ -314,7 +318,7 @@ impl MarkPane {
             Paragraph::new(
                 [
                     Text::Styled(
-                        " Ctrl + Shift + r".into(),
+                        " Ctrl + r".into(),
                         Style {
                             fg: Color::LightRed,
                             modifier: default_style.modifier | Modifier::RAPID_BLINK,