add 'cmd-delete-word' to delete word to end

doc.go

@@ -74,6 +74,7 @@ keybindings:
     cmd-word              (default '<a-f>')
     cmd-word-back         (default '<a-b>')
     cmd-capitalize-word   (default '<a-c>')
+    cmd-delete-word       (default '<a-d>')
 
 The following options can be used to customize the behavior of lf:
 

docstring.go

@@ -78,6 +78,7 @@ keybindings:
     cmd-word              (default '<a-f>')
     cmd-word-back         (default '<a-b>')
     cmd-capitalize-word   (default '<a-c>')
+    cmd-delete-word       (default '<a-d>')
 
 The following options can be used to customize the behavior of lf:
 

eval.go

@@ -642,6 +642,15 @@ func (e *callExpr) eval(app *app, args []string) {
 			app.ui.cmdAccLeft = append(app.ui.cmdAccLeft, app.ui.cmdAccRight[:ind]...)
 			app.ui.cmdAccRight = app.ui.cmdAccRight[ind:]
 		}
+	case "cmd-delete-word":
+		if len(app.ui.cmdAccRight) > 0 {
+			loc := reWordEnd.FindStringIndex(string(app.ui.cmdAccRight))
+			if loc == nil {
+				return
+			}
+			ind := loc[0] + 1
+			app.ui.cmdAccRight = app.ui.cmdAccRight[ind:]
+		}
 	default:
 		cmd, ok := gOpts.cmds[e.name]
 		if !ok {

opts.go

@@ -145,6 +145,7 @@ func init() {
 	gOpts.cmdkeys["<a-f>"] = &callExpr{"cmd-word", nil, 1}
 	gOpts.cmdkeys["<a-b>"] = &callExpr{"cmd-word-back", nil, 1}
 	gOpts.cmdkeys["<a-c>"] = &callExpr{"cmd-capitalize-word", nil, 1}
+	gOpts.cmdkeys["<a-d>"] = &callExpr{"cmd-delete-word", nil, 1}
 
 	// TODO: implement the rest of readline keys