allow :focus based verbs to take a pattern

This allows verb definitions such as the following ones:

```Hjson
    {
        invocation: "gos"
        execution: ":focus"
    }
    {
        invocation: "go {path}"
        execution: ":focus {path}"
    }
    {
        invocation: "goroot"
        execution: ":focus /"
    }
    {
        invocation: "gotar {path}"
        execution: ":focus {path}/target"
    }
```

Fix #389

2 files changed, 26 insertions, 6 deletions

diff --git a/src/app/panel_state.rs b/src/app/panel_state.rs
index ebe6038..f84f697 100644
--- a/src/app/panel_state.rs
+++ b/src/app/panel_state.rs
@@ -476,7 +476,14 @@ pub trait PanelState {
         }
         let res = match &verb.execution {
             VerbExecution::Internal(internal_exec) => {
-                self.on_internal(w, internal_exec, invocation, trigger_type, app_state, cc)
+                self.on_internal(
+                    w,
+                    internal_exec,
+                    invocation,
+                    trigger_type,
+                    app_state,
+                    cc,
+                )
             }
             VerbExecution::External(external) => {
                 self.execute_external(w, verb, external, invocation, app_state, cc)
@@ -522,9 +529,9 @@ pub trait PanelState {
             sel_info,
             app_state,
             if let Some(inv) = invocation {
-                &inv.args
+                inv.args.as_ref()
             } else {
-                &None
+                None
             },
         );
         external_execution.to_cmd_result(w, exec_builder, cc.app.con)
@@ -551,9 +558,9 @@ pub trait PanelState {
             sel_info,
             app_state,
             if let Some(inv) = invocation {
-                &inv.args
+                inv.args.as_ref()
             } else {
-                &None
+                None
             },
         );
         // TODO what follows is dangerous: if an inserted group value contains the separator,
@@ -617,7 +624,7 @@ pub trait PanelState {
                             w,
                             verb,
                             Some(invocation),
-                            TriggerType::Input,
+                            TriggerType::Input(verb),
                             app_state,
                             cc,
                         )
diff --git a/src/app/selection.rs b/src/app/selection.rs
index e3a84f8..2fb56b7 100644
--- a/src/app/selection.rs
+++ b/src/app/selection.rs
@@ -96,6 +96,16 @@ impl Selection<'_> {
 }
 
 impl<'a> SelInfo<'a> {
+    pub fn from_path(path: &'a Path) -> Self {
+        Self::One(
+            Selection {
+                stype: SelectionType::from(path),
+                line: 0,
+                path,
+                is_exe: false, // OK, I don't know
+            }
+        )
+    }
     pub fn count_paths(&self) -> usize {
         match self {
             SelInfo::None => 0,
@@ -124,6 +134,9 @@ impl<'a> SelInfo<'a> {
             _ => None,
         }
     }
+    pub fn one_path(self) -> Option<&'a Path> {
+        self.one_sel().map(|sel| sel.path)
+    }
     pub fn extension(&self) -> Option<&str> {
         match self {
             SelInfo::None => None,