make contextmenu aware of commands

e.g. to process vim-like keybindings for navigation

fixes #108, fixes #157, fixes #178, fixes #199, fixes #250

src/ui/modal.rs

@@ -2,12 +2,22 @@ use cursive::event::{Event, EventResult};
 use cursive::view::{View, ViewWrapper};
 
 pub struct Modal<T: View> {
+    block_events: bool,
     inner: T,
 }
 
 impl<T: View> Modal<T> {
     pub fn new(inner: T) -> Self {
-        Modal { inner }
+        Modal {
+            block_events: true,
+            inner,
+        }
+    }
+    pub fn new_ext(inner: T) -> Self {
+        Modal {
+            block_events: false,
+            inner,
+        }
     }
 }
 
@@ -16,7 +26,10 @@ impl<T: View> ViewWrapper for Modal<T> {
     fn wrap_on_event(&mut self, ch: Event) -> EventResult {
         match self.inner.on_event(ch) {
             EventResult::Consumed(cb) => EventResult::Consumed(cb),
-            _ => EventResult::Consumed(None),
+            _ => match self.block_events {
+                true => EventResult::Consumed(None),
+                false => EventResult::Ignored,
+            },
         }
     }
 }