Implement show_file_selection for kdialog backend

This patch adds an implementation of Backend’s show_file_selection
function to the KDialog backend, using KDialog’s --getopenfilename
option.

1 files changed, 8 insertions, 1 deletions

diff --git a/src/backends/kdialog.rs b/src/backends/kdialog.rs
index c2ddcd0..e556ddf 100644
--- a/src/backends/kdialog.rs
+++ b/src/backends/kdialog.rs
@@ -4,7 +4,7 @@
 
 use std::process;
 
-use crate::{Choice, Error, Input, Message, Password, Question, Result};
+use crate::{Choice, Error, FileSelection, Input, Message, Password, Question, Result};
 
 /// Subprocess exit codes
 ///
@@ -136,4 +136,11 @@ impl super::Backend for KDialog {
         self.execute(args, &question.title)
             .and_then(|output| get_choice(output.status))
     }
+
+    fn show_file_selection(&self, file_selection: &FileSelection) -> Result<Option<String>> {
+        let dir = file_selection.path_to_string().ok_or("path not valid")?;
+        let args = vec!["--getopenfilename", &dir];
+        self.execute(args, &file_selection.title)
+            .and_then(get_stdout)
+    }
 }