feat: pick folder dialog

flake.nix

@@ -32,6 +32,8 @@
             libxcb
           ]
           ++ lib.optionals stdenv.hostPlatform.isLinux [
+            dbus.lib
+
             vulkan-loader
             wayland
           ];

src/app/mod.rs

@@ -1,4 +1,10 @@
-use std::{borrow::Cow, collections::BTreeMap, env, path::PathBuf, process};
+use std::{
+    borrow::Cow,
+    collections::BTreeMap,
+    env,
+    path::{Path, PathBuf},
+    process,
+};
 
 use iced::{
     Color, Element, Event, Length, Renderer, Subscription, Task, Theme, application, event,
@@ -6,6 +12,7 @@ use iced::{
 };
 use ignore::{WalkBuilder, types::TypesBuilder};
 use rayon::iter::{ParallelBridge, ParallelIterator};
+use rfd::AsyncFileDialog;
 
 use crate::SUPPORTED_TYPES;
 
@@ -16,6 +23,8 @@ enum Message {
 
     OpenImage(PathBuf),
 
+    OpenPath(Option<PathBuf>),
+
     KeyPressed(keyboard::Key, keyboard::Modifiers),
 }
 
@@ -29,37 +38,20 @@ struct State {
 }
 
 impl State {
-    fn new() -> Self {
-        let mut builder = TypesBuilder::new();
-        builder.add_defaults();
-        for ext in SUPPORTED_TYPES {
-            builder.add("supportedImages", ext).unwrap();
-        }
-        builder.select("supportedImages");
-
-        Self {
-            columns: 3,
-            error: None,
-            images: WalkBuilder::new(
+    fn new() -> (Self, Task<Message>) {
+        (
+            Self {
+                columns: 3,
+                error: None,
+                images: BTreeMap::new(),
+            },
+            Task::done(Message::OpenPath(Some(
                 env::args()
                     .nth(1)
-                    .map(Cow::Owned)
-                    .unwrap_or(Cow::Borrowed("./"))
-                    .as_ref(),
-            )
-            .types(builder.build().unwrap())
-            .max_depth(Some(1))
-            .build()
-            .par_bridge()
-            .filter_map(|r| {
-                r.inspect_err(|e| eprintln!("{e}"))
-                    .ok()
-                    .map(|entry| entry.into_path())
-            })
-            .filter(|path| path.is_file())
-            .map(|path| (path, None))
-            .collect(),
-        }
+                    .unwrap_or_else(|| String::from("./"))
+                    .into(),
+            ))),
+        )
     }
     fn update(&mut self, message: Message) -> Task<Message> {
         match message {
@@ -80,6 +72,17 @@ impl State {
                     .err()
             }
 
+            Message::OpenPath(opt_path) => {
+                self.error = match opt_path {
+                    Some(_) => None,
+                    None => Some("no path to open given".into()),
+                };
+
+                if let Some(path) = opt_path {
+                    self.open_path(path);
+                }
+            }
+
             Message::KeyPressed(key, modifiers) => match key.as_ref() {
                 // input field cycling
                 keyboard::Key::Named(keyboard::key::Named::Tab) => {
@@ -90,6 +93,13 @@ impl State {
                     };
                 }
 
+                keyboard::Key::Character("o") => {
+                    return Task::perform(
+                        async { AsyncFileDialog::new().pick_folder().await.map(Into::into) },
+                        Message::OpenPath,
+                    );
+                }
+
                 keyboard::Key::Character("=" | "+") => {
                     self.columns = (self.columns + 1).clamp(1, 10)
                 }
@@ -157,6 +167,29 @@ impl State {
             _ => None,
         })
     }
+
+    fn open_path(&mut self, path: impl AsRef<Path>) {
+        let mut builder = TypesBuilder::new();
+        builder.add_defaults();
+        for ext in SUPPORTED_TYPES {
+            builder.add("supportedImages", ext).unwrap();
+        }
+        builder.select("supportedImages");
+
+        self.images = WalkBuilder::new(path)
+            .types(builder.build().unwrap())
+            .max_depth(Some(1))
+            .build()
+            .par_bridge()
+            .filter_map(|r| {
+                r.inspect_err(|e| eprintln!("{e}"))
+                    .ok()
+                    .map(|entry| entry.into_path())
+            })
+            .filter(|path| path.is_file())
+            .map(|path| (path, None))
+            .collect();
+    }
 }
 
 pub fn run() -> Result<(), impl std::error::Error> {