flake.nix

@@ -19,24 +19,21 @@
         cargoToml = fromTOML (builtins.readFile ./Cargo.toml);
         name = cargoToml.package.name;
 
-        dlDeps =
+        dlDeps = with pkgs; [
-          with pkgs;
+          # libdbus, for rfd
-          [
+          dbus.lib
+
           # needed for both x11 and wayland
           libxkbcommon
           libGL
+          vulkan-loader
+
+          wayland
 
           libx11
           libxcursor
           libxi
           libxcb
-          ]
-          ++ lib.optionals stdenv.hostPlatform.isLinux [
-            # libdbus, for rfd
-            dbus.lib
-
-            vulkan-loader
-            wayland
         ];
 
         commonArgs = {

src/main.rs

@@ -1,9 +1,4 @@
-use std::{
+use std::{borrow::Cow, env, ffi::OsStr, path::Path};
-    borrow::Cow,
-    env,
-    ffi::OsStr,
-    path::{Path, PathBuf},
-};
 
 use iced::{
     Alignment, Color, Element, Length, Renderer, Subscription, Task, Theme, event,
@@ -17,9 +12,7 @@ mod utils;
 
 #[derive(Clone, Debug)]
 enum Message {
-    ImagePicked(Result<PathBuf, String>),
     ImageDisplayReady(Result<widget::image::Allocation, widget::image::Error>),
-    SavePathPicked(Result<PathBuf, String>),
 
     Event(iced::Event),
 }
@@ -36,7 +29,7 @@ struct State {
 }
 impl State {
     fn new() -> (Self, Task<Message>) {
-        let mut state = Self::default();
+        let mut state = State::default();
 
         if let Some(path) = env::args().nth(1) {
             match state.load_image(path) {
@@ -50,16 +43,7 @@ impl State {
     fn view(&self) -> Element<'_, Message, Theme, Renderer> {
         let mut main = Vec::new();
 
-        main.push(self.image_display.as_ref().map_or_else(
+        main.push(if let Some(allocation) = self.image_display.as_ref() {
-            || {
-                widget::container(widget::text(include_str!("usage.txt")))
-                    .height(Length::Fill)
-                    .width(Length::Fill)
-                    .align_x(Alignment::Center)
-                    .align_y(Alignment::Center)
-                    .into()
-            },
-            |allocation| {
             widget::image::viewer(allocation.handle().clone())
                 .filter_method(self.image_filter)
                 .max_scale(50.)
@@ -67,8 +51,14 @@ impl State {
                 .width(Length::Fill)
                 .height(Length::Fill)
                 .into()
-            },
+        } else {
-        ));
+            widget::container(widget::text(include_str!("usage.txt")))
+                .height(Length::Fill)
+                .width(Length::Fill)
+                .align_x(Alignment::Center)
+                .align_y(Alignment::Center)
+                .into()
+        });
 
         if let Some(error) = self.error.as_ref() {
             main.push(widget::text(error).style(widget::text::danger).into());
@@ -81,26 +71,9 @@ impl State {
     }
     fn update(&mut self, message: Message) -> Task<Message> {
         match message {
-            Message::ImagePicked(result) => match result.and_then(|path| self.load_image(path)) {
-                Err(e) => self.error = Some(e),
-                Ok(task) => {
-                    self.error = None;
-                    return task;
-                }
-            },
             Message::ImageDisplayReady(result) => {
                 self.image_display = Some(result.unwrap());
             }
-            Message::SavePathPicked(result) => {
-                self.error = result
-                    .and_then(|path| {
-                        self.image.as_ref().map_or_else(
-                            || Err("no image to save".into()),
-                            |image| image.save(path).map_err(|e| e.to_string()),
-                        )
-                    })
-                    .err();
-            }
 
             Message::Event(iced::Event::Keyboard(keyboard::Event::KeyPressed {
                 key,
@@ -111,30 +84,39 @@ impl State {
                 Key::Named(key::Named::Tab) => {
                     if modifiers.shift() {
                         return widget::operation::focus_previous();
-                    }
+                    } else {
                         return widget::operation::focus_next();
                     }
-
-                Key::Character("o") => {
-                    return Task::perform(utils::pick_image(), Message::ImagePicked);
                 }
 
-                Key::Character("r") => match self.image.as_ref() {
+                Key::Character("o") => match self.pick_and_load_image() {
+                    Ok(task) => {
+                        self.error = None;
+                        return task;
+                    }
+                    Err(e) => self.error = Some(e),
+                },
+
+                Key::Character("r") => {
+                    match self.image.as_ref() {
                         None => self.error = Some("no image to rotate".into()),
                         Some(image) => {
                             self.error = None;
                             self.image = Some(imageops::rotate90(image));
                             return self.allocate_image();
                         }
-                },
+                    };
-                Key::Character("i") => match self.image.as_mut() {
+                }
+                Key::Character("i") => {
+                    match self.image.as_mut() {
                         None => self.error = Some("no image to invert".into()),
                         Some(image) => {
                             self.error = None;
                             imageops::invert(image);
                             return self.allocate_image();
                         }
-                },
+                    };
+                }
                 Key::Character("f") => {
                     self.image_filter = match self.image_filter {
                         widget::image::FilterMethod::Linear => widget::image::FilterMethod::Nearest,
@@ -146,12 +128,7 @@ impl State {
                 }
 
                 Key::Character("s") => {
-                    if self.image.is_some() {
+                    self.save_image();
-                        self.error = None;
-                        return Task::perform(utils::pick_save_path(), Message::SavePathPicked);
-                    } else {
-                        self.error = Some("no image to save".into())
-                    }
                 }
 
                 Key::Character("q") => return window::latest().and_then(window::close),
@@ -183,7 +160,8 @@ impl State {
                 "{} {}x{}",
                 path.as_ref()
                     .file_name()
-                    .map_or(Cow::Borrowed("[no file]"), OsStr::to_string_lossy),
+                    .map(OsStr::to_string_lossy)
+                    .unwrap_or(Cow::Borrowed("[no file]")),
                 image.width(),
                 image.height(),
             ));
@@ -194,6 +172,13 @@ impl State {
             self.allocate_image()
         })
     }
+    fn pick_and_load_image(&mut self) -> Result<Task<Message>, String> {
+        utils::pick_image().and_then(|path| self.load_image(path))
+    }
+
+    fn save_image(&mut self) {
+        self.error = utils::save_image(self.image.as_ref()).err();
+    }
 
     fn allocate_image(&self) -> Task<Message> {
         let Some(image) = self.image.as_ref() else {
@@ -225,15 +210,13 @@ impl State {
         event::listen().map(Message::Event)
     }
     fn title(&self) -> String {
-        self.info.as_ref().map_or_else(
+        match self.info.as_ref() {
-            || "imagey".into(),
+            Some(info) => format!(
-            |info| {
-                format!(
                 "imagey {info} {}",
                 utils::string_from_filter_type(self.image_filter),
-                )
+            ),
-            },
+            None => "imagey".into(),
-        )
+        }
     }
 }
 

src/utils.rs

@@ -2,12 +2,12 @@ use std::path::{Path, PathBuf};
 
 use iced::widget;
 use image::{DynamicImage, ImageDecoder, ImageReader, ImageResult, RgbaImage};
-use rfd::AsyncFileDialog;
+use rfd::FileDialog;
 
 pub fn load_image(path: impl AsRef<Path>) -> Result<RgbaImage, String> {
-    load_image_impl(path).map_err(|e| e.to_string())
+    _load_image(path).map_err(|e| e.to_string())
 }
-fn load_image_impl(path: impl AsRef<Path>) -> ImageResult<RgbaImage> {
+fn _load_image(path: impl AsRef<Path>) -> ImageResult<RgbaImage> {
     let mut decoder = ImageReader::open(path)?
         .with_guessed_format()?
         .into_decoder()?;
@@ -20,8 +20,8 @@ fn load_image_impl(path: impl AsRef<Path>) -> ImageResult<RgbaImage> {
 
     Ok(decoded_image.into_rgba8())
 }
-pub async fn pick_image() -> Result<PathBuf, String> {
+pub fn pick_image() -> Result<PathBuf, String> {
-    let Some(filehandle) = AsyncFileDialog::new()
+    let Some(path) = FileDialog::new()
         .add_filter(
             "image",
             &[
@@ -30,23 +30,30 @@ pub async fn pick_image() -> Result<PathBuf, String> {
             ],
         )
         .pick_file()
-        .await
     else {
         return Err("no path to open provided".into());
     };
 
-    Ok(filehandle.path().to_owned())
+    Ok(path)
 }
 
-pub async fn pick_save_path() -> Result<PathBuf, String> {
+pub fn save_image(image: Option<&RgbaImage>) -> Result<(), String> {
-    let Some(filehandle) = AsyncFileDialog::new().save_file().await else {
+    let Some(image) = image else {
+        return Err("no image to save".into());
+    };
+
+    let Some(path) = FileDialog::new().save_file() else {
         return Err("no path to save provided".into());
     };
 
-    Ok(filehandle.path().to_owned())
+    if let Err(e) = image.save(&path) {
+        return Err(e.to_string());
+    };
+
+    Ok(())
 }
 
-pub const fn string_from_filter_type(f: widget::image::FilterMethod) -> &'static str {
+pub fn string_from_filter_type(f: widget::image::FilterMethod) -> &'static str {
     match f {
         widget::image::FilterMethod::Linear => "bilinear",
         widget::image::FilterMethod::Nearest => "nearest neighbor",