refactor: move kra to crate

in the interest of reusing that code in a gallery app

Cargo.lock

@@ -136,6 +136,27 @@ version = "1.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c3d036a3c4ab069c7b410a2ce876bd74808d2d0888a82667669f8e783a898bf1"
 
+[[package]]
+name = "arboard"
+version = "3.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0348a1c054491f4bfe6ab86a7b6ab1e44e45d899005de92f58b3df180b36ddaf"
+dependencies = [
+ "clipboard-win",
+ "image",
+ "log",
+ "objc2 0.6.4",
+ "objc2-app-kit 0.3.2",
+ "objc2-core-foundation",
+ "objc2-core-graphics",
+ "objc2-foundation 0.3.2",
+ "parking_lot",
+ "percent-encoding",
+ "windows-sys 0.59.0",
+ "wl-clipboard-rs",
+ "x11rb",
+]
+
 [[package]]
 name = "arg_enum_proc_macro"
 version = "0.3.4"
@@ -1226,6 +1247,12 @@ version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5baebc0774151f905a1a2cc41989300b1e6fbb29aff0ceffa1064fdd3088d582"
 
+[[package]]
+name = "fixedbitset"
+version = "0.5.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1d674e81391d1e1ab681a28d99df07927c6d4aa5b027d7da16ba32d1d21ecd99"
+
 [[package]]
 name = "flate2"
 version = "1.1.9"
@@ -1900,11 +1927,14 @@ dependencies = [
 name = "imagey"
 version = "0.1.0"
 dependencies = [
+ "arboard",
  "dirs",
  "iced",
  "image",
  "jxl-oxide",
+ "kra-image-integration",
  "rfd",
+ "size",
  "zip",
 ]
 
@@ -2238,6 +2268,16 @@ version = "3.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e2db585e1d738fc771bf08a151420d3ed193d9d895a36df7f6f8a9456b911ddc"
 
+[[package]]
+name = "kra-image-integration"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ab1db0e6caced9f4b26057c10ea190c447a8be4fcac03afd7213e35168ad700"
+dependencies = [
+ "image",
+ "zip",
+]
+
 [[package]]
 name = "kurbo"
 version = "0.10.4"
@@ -3064,6 +3104,16 @@ dependencies = [
  "pin-project-lite",
 ]
 
+[[package]]
+name = "os_pipe"
+version = "1.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7d8fae84b431384b68627d0f9b3b1245fcf9f46f6c0e3dc902e9dce64edd1967"
+dependencies = [
+ "libc",
+ "windows-sys 0.61.2",
+]
+
 [[package]]
 name = "owned_ttf_parser"
 version = "0.25.1"
@@ -3130,6 +3180,17 @@ version = "2.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9b4f627cb1b25917193a259e49bdad08f671f8d9708acfd5fe0a8c1455d87220"
 
+[[package]]
+name = "petgraph"
+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8701b58ea97060d5e5b155d383a69952a60943f0e6dfe30b04c287beb0b27455"
+dependencies = [
+ "fixedbitset",
+ "hashbrown 0.15.5",
+ "indexmap",
+]
+
 [[package]]
 name = "pin-project"
 version = "1.1.13"
@@ -3787,6 +3848,12 @@ version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e3a9fe34e3e7a50316060351f37187a3f546bce95496156754b601a5fa71b76e"
 
+[[package]]
+name = "size"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1b6709c7b6754dca1311b3c73e79fcce40dd414c782c66d88e8823030093b02b"
+
 [[package]]
 name = "skrifa"
 version = "0.37.0"
@@ -4246,6 +4313,17 @@ dependencies = [
  "once_cell",
 ]
 
+[[package]]
+name = "tree_magic_mini"
+version = "3.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b8765b90061cba6c22b5831f675da109ae5561588290f9fa2317adab2714d5a6"
+dependencies = [
+ "memchr",
+ "nom",
+ "petgraph",
+]
+
 [[package]]
 name = "ttf-parser"
 version = "0.25.1"
@@ -5109,6 +5187,24 @@ version = "0.57.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1ebf944e87a7c253233ad6766e082e3cd714b5d03812acc24c318f549614536e"
 
+[[package]]
+name = "wl-clipboard-rs"
+version = "0.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e9651471a32e87d96ef3a127715382b2d11cc7c8bb9822ded8a7cc94072eb0a3"
+dependencies = [
+ "libc",
+ "log",
+ "os_pipe",
+ "rustix 1.1.4",
+ "thiserror 2.0.18",
+ "tree_magic_mini",
+ "wayland-backend",
+ "wayland-client",
+ "wayland-protocols",
+ "wayland-protocols-wlr",
+]
+
 [[package]]
 name = "x11-dl"
 version = "2.21.0"

Cargo.toml

@@ -6,7 +6,9 @@ license = "AGPL-3.0-or-later"
 
 [dependencies]
 dirs = "6.0.0"
+kra-image-integration = "0.1.0"
 rfd = "0.17.2"
+size = "0.5.0"
 zip = "8.6.0"
 
 [dependencies.iced]
@@ -21,3 +23,7 @@ features = [ "avif-native" ]
 version = "0.12.6"
 # I really wish the image crate was named better
 features = [ "image" ]
+
+[dependencies.arboard]
+version = "3.6.1"
+features = [ "wayland-data-control" ]

README.md

@@ -0,0 +1,41 @@
+# imagey
+
+image viewer and maybe editor; inspired by mpv's simplicity
+
+name is subject to change, suggestions welcome :)
+
+## usage
+
+```sh
+# try it out!
+nix run git+https://git.federated.nexus/electria/imagey
+
+# install it imperatively
+nix profile install git+https://git.federated.nexus/electria/imagey
+```
+
+keybinds are shown on startup if you didn't start it with an image
+
+## known issues
+
+### JXL
+
+1. encoding is not implemented (jxl-oxide is decoding-only)
+2. oreintation is incorrect in some cases
+
+    if the image has metadata oreintation AND
+
+    it's a jxl without the right extension OR
+    it's a jpeg with the jxl extension
+
+    this is due to the JXL decoder automatically rotating the image,
+    while the JPEG decoder (for instance) requires the extra step.
+
+    my workaround is to check the path of the input file,
+    not changing the oreintation if it has the jxl extension;
+    causing these caveats for cases where the extension is wrong.
+
+### clipboard
+
+1. large images (eg photos) don't seem to copy on linux/wayland,
+    (despite set_image not returning any error)

flake.nix

@@ -19,21 +19,24 @@
         cargoToml = fromTOML (builtins.readFile ./Cargo.toml);
         name = cargoToml.package.name;
 
-        dlDeps = with pkgs; [
+        dlDeps =
-          # libdbus, for rfd
+          with pkgs;
-          dbus
+          [
-
             # 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/kra.rs

@@ -1,40 +0,0 @@
-use std::{
-    ffi::OsString,
-    io::{self, Read},
-};
-
-use image::{
-    ImageDecoder, ImageError, ImageReader, ImageResult,
-    error::DecodingError,
-    hooks::{self, GenericReader},
-};
-use zip::ZipArchive;
-
-pub fn register() -> bool {
-    hooks::register_decoding_hook(OsString::from("kra"), Box::new(hook))
-}
-
-fn hook<'a>(reader: GenericReader<'a>) -> ImageResult<Box<dyn ImageDecoder + 'a>> {
-    let mut zip = ZipArchive::new(reader).map_err(to_image_error)?;
-
-    let mut reader = zip.by_name("mergedimage.png").map_err(to_image_error)?;
-
-    // reading it all and wrapping it with a Cursor
-    // is the only way I know to give it Seek
-    // (which is required by ImageReader)
-    let mut buf = Vec::new();
-    reader.read_to_end(&mut buf)?;
-
-    let image_reader = ImageReader::with_format(io::Cursor::new(buf), image::ImageFormat::Png);
-
-    Ok(Box::new(image_reader.into_decoder()?))
-}
-
-fn to_image_error(
-    e: impl Into<Box<dyn std::error::Error + std::marker::Send + Sync + 'static>>,
-) -> ImageError {
-    ImageError::Decoding(DecodingError::new(
-        image::error::ImageFormatHint::PathExtension("kra".into()),
-        e,
-    ))
-}

src/main.rs

@@ -1,23 +1,32 @@
-use std::{borrow::Cow, env, ffi::OsStr, path::Path};
+use std::{
+    borrow::Cow,
+    env,
+    ffi::OsStr,
+    os::unix::fs::MetadataExt,
+    path::{Path, PathBuf},
+};
 
+use arboard::Clipboard;
 use iced::{
     Alignment, Color, Element, Length, Renderer, Subscription, Task, Theme, event,
     keyboard::{self, Key, key},
     theme, widget, window,
 };
 use image::{EncodableLayout, RgbaImage, imageops};
+use size::Size;
 
-mod kra;
 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),
 }
 
-#[derive(Clone, Debug, Default)]
+#[derive(Default)]
 struct State {
     image: Option<RgbaImage>,
     image_display: Option<widget::image::Allocation>,
@@ -26,10 +35,12 @@ struct State {
     error: Option<String>,
     info: Option<String>,
     infobar_shown: bool,
+
+    clipboard: Option<Clipboard>,
 }
 impl State {
     fn new() -> (Self, Task<Message>) {
-        let mut state = State::default();
+        let mut state = Self::default();
 
         if let Some(path) = env::args().nth(1) {
             match state.load_image(path) {
@@ -41,9 +52,16 @@ impl State {
         (state, Task::none())
     }
     fn view(&self) -> Element<'_, Message, Theme, Renderer> {
-        let mut main = Vec::new();
+        let main = 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.)
@@ -51,29 +69,51 @@ 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()
-        });
 
+        let mut bar = Vec::new();
         if let Some(error) = self.error.as_ref() {
-            main.push(widget::text(error).style(widget::text::danger).into());
+            bar.push(
+                widget::container(widget::text(error).style(widget::text::danger))
+                    .align_x(Alignment::Start)
+                    .width(Length::Fill)
+                    .into(),
+            );
         }
         if self.infobar_shown && self.info.is_some() {
-            main.push(widget::text(self.title()).into());
+            bar.push(
+                widget::container(widget::text(self.title()))
+                    .align_x(Alignment::End)
+                    .width(Length::Fill)
+                    .into(),
+            );
         }
 
-        widget::column(main).into()
+        widget::column([main, widget::row(bar).into()]).into()
     }
     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,
@@ -84,39 +124,30 @@ 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("o") => match self.pick_and_load_image() {
+                Key::Character("r") => match self.image.as_ref() {
-                    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,
@@ -128,11 +159,58 @@ impl State {
                 }
 
                 Key::Character("s") => {
-                    self.save_image();
+                    if self.image.is_some() {
+                        self.error = None;
+                        return Task::perform(utils::pick_save_path(), Message::SavePathPicked);
+                    }
+                    self.error = Some("no image to save".into());
                 }
 
                 Key::Character("q") => return window::latest().and_then(window::close),
 
+                Key::Character("y") | Key::Character("c") => {
+                    if let Some(image) = self.image.as_ref() {
+                        match match self.clipboard.take() {
+                            Some(c) => Ok(c),
+                            None => Clipboard::new(),
+                        } {
+                            Ok(mut clipboard) => {
+                                self.error = clipboard
+                                    .set_image(utils::arboard_from_rgbaimage(image))
+                                    .map_err(|e| e.to_string())
+                                    .err();
+                                self.clipboard = Some(clipboard);
+                            }
+                            Err(e) => self.error = Some(e.to_string()),
+                        }
+                    } else {
+                        self.error = Some("no image to yank".into());
+                    }
+                }
+                Key::Character("p") | Key::Character("v") => {
+                    match match self.clipboard.take() {
+                        Some(c) => Ok(c),
+                        None => Clipboard::new(),
+                    } {
+                        Ok(mut clipboard) => {
+                            let result = clipboard.get_image().map(utils::rgbaimage_from_arboard);
+
+                            self.error = result.as_ref().map_err(|e| e.to_string()).err();
+                            self.clipboard = Some(clipboard);
+
+                            if let Ok(image) = result {
+                                self.info = Some(format!("{}x{}", image.width(), image.height(),));
+                                if image.dimensions() < (100, 100) {
+                                    self.image_filter = widget::image::FilterMethod::Nearest;
+                                }
+                                self.image = Some(image);
+                                return self.allocate_image();
+                            }
+                        }
+                        Err(e) => self.error = Some(e.to_string()),
+                    }
+                }
+
                 // ignore unused keys
                 _ => {}
             },
@@ -157,11 +235,17 @@ impl State {
     fn load_image(&mut self, path: impl AsRef<Path>) -> Result<Task<Message>, String> {
         utils::load_image(&path).map(|image| {
             self.info = Some(format!(
-                "{} {}x{}",
+                "{} {} {}x{}",
                 path.as_ref()
                     .file_name()
-                    .map(OsStr::to_string_lossy)
+                    .map_or(Cow::Borrowed("[no file]"), OsStr::to_string_lossy),
-                    .unwrap_or(Cow::Borrowed("[no file]")),
+                path.as_ref().metadata().map_or_else(
+                    |e| {
+                        eprintln!("failed to read metadata: {e}");
+                        Cow::Borrowed("[no size]")
+                    },
+                    |m| Cow::Owned(Size::from_bytes(m.size()).to_string())
+                ),
                 image.width(),
                 image.height(),
             ));
@@ -172,13 +256,6 @@ 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 {
@@ -189,6 +266,18 @@ impl State {
         widget::image::allocate(widget::image::Handle::from_rgba(
             image.width(),
             image.height(),
+            // SAFETY: this is a sort of race condition;
+            // will cause panics with large enough images,
+            // when they are edited consecutively.
+            //
+            // this can be reproduced by holding down 'i' with a 10k by 10k px image,
+            // which will invert the colors rapidly and eventually crash the app.
+            //
+            // however, that is not such a problem in this case,
+            // and I don't know a different way of doing this that doesn't copy
+            // (performance loss, which is can be pretty big)
+            // or likely cause flickering instead in such cases
+            // (like using Handle over Allocation to immediately drop the last one)
             unsafe { std::mem::transmute::<&[u8], &'static [u8]>(image.as_bytes()) },
         ))
         .map(Message::ImageDisplayReady)
@@ -198,19 +287,21 @@ impl State {
         event::listen().map(Message::Event)
     }
     fn title(&self) -> String {
-        match self.info.as_ref() {
+        self.info.as_ref().map_or_else(
-            Some(info) => format!(
+            || "imagey".into(),
+            |info| {
+                format!(
                     "imagey {info} {}",
                     utils::string_from_filter_type(self.image_filter),
-            ),
+                )
-            None => "imagey".into(),
+            },
-        }
+        )
     }
 }
 
 fn main() -> Result<(), iced::Error> {
     jxl_oxide::integration::register_image_decoding_hook();
-    kra::register();
+    kra_image_integration::register();
 
     iced::application(State::new, State::update, State::view)
         .subscription(State::subscription)

src/usage.txt

@@ -5,3 +5,6 @@
 'b' to toggle the bar
 's' to save the image
 'q' to quit
+
+'y' or 'c' to yank
+'p' or 'v' to put

src/utils.rs

@@ -1,14 +1,18 @@
-use std::path::{Path, PathBuf};
+use std::{
+    borrow::Cow,
+    ffi::OsStr,
+    path::{Path, PathBuf},
+};
 
 use iced::widget;
 use image::{DynamicImage, ImageDecoder, ImageReader, ImageResult, RgbaImage};
-use rfd::FileDialog;
+use rfd::AsyncFileDialog;
 
 pub fn load_image(path: impl AsRef<Path>) -> Result<RgbaImage, String> {
-    _load_image(path).map_err(|e| e.to_string())
+    load_image_impl(path).map_err(|e| e.to_string())
 }
-fn _load_image(path: impl AsRef<Path>) -> ImageResult<RgbaImage> {
+fn load_image_impl(path: impl AsRef<Path>) -> ImageResult<RgbaImage> {
-    let mut decoder = ImageReader::open(path)?
+    let mut decoder = ImageReader::open(&path)?
         .with_guessed_format()?
         .into_decoder()?;
 
@@ -16,12 +20,22 @@ fn _load_image(path: impl AsRef<Path>) -> ImageResult<RgbaImage> {
 
     let mut decoded_image = DynamicImage::from_decoder(decoder)?;
 
+    // the condition is a workaround to not rotate JXL images twice;
+    // since they are already rotated by the decoder
+    // (while jpegs for instance aren't)
+    if !path
+        .as_ref()
+        .extension()
+        .map(OsStr::to_string_lossy)
+        .is_some_and(|s| s == "jxl")
+    {
         decoded_image.apply_orientation(oreintation);
+    }
 
     Ok(decoded_image.into_rgba8())
 }
-pub fn pick_image() -> Result<PathBuf, String> {
+pub async fn pick_image() -> Result<PathBuf, String> {
-    let Some(path) = FileDialog::new()
+    let Some(filehandle) = AsyncFileDialog::new()
         .add_filter(
             "image",
             &[
@@ -30,32 +44,41 @@ pub fn pick_image() -> Result<PathBuf, String> {
             ],
         )
         .pick_file()
+        .await
     else {
         return Err("no path to open provided".into());
     };
 
-    Ok(path)
+    Ok(filehandle.path().to_owned())
 }
 
-pub fn save_image(image: Option<&RgbaImage>) -> Result<(), String> {
+pub async fn pick_save_path() -> Result<PathBuf, String> {
-    let Some(image) = image else {
+    let Some(filehandle) = AsyncFileDialog::new().save_file().await else {
-        return Err("no image to save".into());
-    };
-
-    let Some(path) = FileDialog::new().save_file() else {
         return Err("no path to save provided".into());
     };
 
-    if let Err(e) = image.save(&path) {
+    Ok(filehandle.path().to_owned())
-        return Err(e.to_string());
-    };
-
-    Ok(())
 }
 
-pub fn string_from_filter_type(f: widget::image::FilterMethod) -> &'static str {
+pub const fn string_from_filter_type(f: widget::image::FilterMethod) -> &'static str {
     match f {
         widget::image::FilterMethod::Linear => "bilinear",
         widget::image::FilterMethod::Nearest => "nearest neighbor",
     }
 }
+
+pub fn arboard_from_rgbaimage<'a>(image: &'a RgbaImage) -> arboard::ImageData<'a> {
+    arboard::ImageData {
+        width: image.width() as usize,
+        height: image.height() as usize,
+        bytes: Cow::Borrowed(image.as_ref()),
+    }
+}
+pub fn rgbaimage_from_arboard(image: arboard::ImageData) -> RgbaImage {
+    RgbaImage::from_raw(
+        image.width as u32,
+        image.height as u32,
+        image.bytes.into_owned(),
+    )
+    .unwrap()
+}