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.cargo/
*.pdb
**/*.rs.bk
DEVNOTE.md
tmp/
debug/
target/
vendor/
vendor.tar
debian/*
!debian/changelog
!debian/control
!debian/copyright
!debian/install
!debian/rules
!debian/source

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# SPDX-License-Identifier: GPL-3.0-or-later
# Cargo.toml
#
# Project metadata and dependencies for the Noctua document viewer.
[package]
name = "noctua"
version = "0.1.0"
edition = "2024"
description = "A wise document and image viewer for the COSMIC™ desktop"
repository = "https://codeberg.org/wfx/noctua"
authors = ["Wolfgang Morawetz <wfx@mailbox.org>"]
license = "GPL-3.0-or-later"
keywords = ["document", "image", "viewer", "pdf", "cosmic"]
categories = ["gui", "multimedia::graphics", "multimedia::images"]
[dependencies]
# Error handling
anyhow = "1"
# Async / concurrency
futures-util = "0.3.31"
tokio = { version = "1.48.0", features = ["full"] }
# Logging
log = "0.4.20"
simple_logger = "4.2.0"
# i18n / localization
i18n-embed = { version = "0.16", features = [
"fluent-system",
"desktop-requester",
] }
i18n-embed-fl = "0.10"
# Misc utilities
open = "5.3.2"
rust-embed = "8.8.0"
image = "0.25.9"
clap = { version = "4.5.54", features = ["derive"] }
env_logger = "0.11.8"
[dependencies.libcosmic]
git = "https://github.com/pop-os/libcosmic.git"
# See https://github.com/pop-os/libcosmic/blob/master/Cargo.toml for available features.
features = [
# Accessibility support
"a11y",
# About widget for the app
"about",
# Uses cosmic-settings-daemon to watch for config file changes
"dbus-config",
# Support creating additional application windows.
"multi-window",
# On app startup, focuses an existing instance if the app is already open
"single-instance",
# Uses tokio as the executor for the runtime
"tokio",
# Windowing support for X11, Windows, Mac, & Redox
"winit",
# Add Wayland support to winit
"wayland",
# GPU-accelerated rendering
"wgpu",
]
# Uncomment to test a locally-cloned libcosmic
# [patch.'https://github.com/pop-os/libcosmic']
# libcosmic = { path = "../libcosmic" }
# cosmic-config = { path = "../libcosmic/cosmic-config" }
# cosmic-theme = { path = "../libcosmic/cosmic-theme" }

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THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.
17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.

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# Noctua
An image viewer application for the COSMIC™ desktop
## Keyboard Shortcuts
### Navigation
| Key | Action | Status |
|:------|:------------------|:--------|
| `←` | Previous document | working |
| `→` | Next document | working |
### Transformations
| Key | Action | Status |
|:------------|:-----------------------------|:--------|
| `H` | Flip horizontal | working |
| `V` | Flip vertical | working |
| `R` | Rotate clockwise (90°) | working |
| `Shift + R` | Rotate counter-clockwise (90°) | working |
### Zoom
| Key | Action | Status |
|:----------|:---------------------------|:--------|
| `+` / `=` | Zoom in | partial |
| `-` | Zoom out | partial |
| `1` | Reset zoom (100% / actual) | working |
| `F` | Fit image to window | working |
> **Note:** Zoom is recognized but visual feedback is limited without scrollable viewport.
### Pan
| Key | Action | Status |
|:-----------|:-----------------------|:--------------------|
| `Ctrl + ←` | Pan left | not yet implemented |
| `Ctrl + →` | Pan right | not yet implemented |
| `Ctrl + ↑` | Pan up | not yet implemented |
| `Ctrl + ↓` | Pan down | not yet implemented |
| `0` | Reset pan (center) | not yet implemented |
> **Note:** Panning requires a scrollable viewport or custom canvas widget.
### Modes
| Key | Action | Status |
|:----|:------------------|:--------------------|
| `C` | Toggle crop mode | not yet implemented |
| `S` | Toggle scale mode | not yet implemented |
## Installation
A [justfile](./justfile) is included by default for the [casey/just][just] command runner.
- `just` builds the application with the default `just build-release` recipe
- `just run` builds and runs the application
- `just install` installs the project into the system
- `just vendor` creates a vendored tarball
- `just build-vendored` compiles with vendored dependencies from that tarball
- `just check` runs clippy on the project to check for linter warnings
- `just check-json` can be used by IDEs that support LSP
## Translators
[Fluent][fluent] is used for localization of the software. Fluent's translation files are found in the [i18n directory](./i18n). New translations may copy the [English (en) localization](./i18n/en) of the project, rename `en` to the desired [ISO 639-1 language code][iso-codes], and then translations can be provided for each [message identifier][fluent-guide]. If no translation is necessary, the message may be omitted.
## Packaging
If packaging for a Linux distribution, vendor dependencies locally with the `vendor` rule, and build with the vendored sources using the `build-vendored` rule. When installing files, use the `rootdir` and `prefix` variables to change installation paths.
```sh
just vendor
just build-vendored
just rootdir=debian/noctua prefix=/usr install
```
It is recommended to build a source tarball with the vendored dependencies, which can typically be done by running `just vendor` on the host system before it enters the build environment.
## Developers
Developers should install [rustup][rustup] and configure their editor to use [rust-analyzer][rust-analyzer]. To improve compilation times, disable LTO in the release profile, install the [mold][mold] linker, and configure [sccache][sccache] for use with Rust. The [mold][mold] linker will only improve link times if LTO is disabled.
[fluent]: https://projectfluent.org/
[fluent-guide]: https://projectfluent.org/fluent/guide/hello.html
[iso-codes]: https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes
[just]: https://github.com/casey/just
[rustup]: https://rustup.rs/
[rust-analyzer]: https://rust-analyzer.github.io/
[mold]: https://github.com/rui314/mold
[sccache]: https://github.com/mozilla/sccache

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fallback_language = "en"
[fluent]
assets_dir = "i18n"

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# SPDX-License-Identifier: MPL-2.0
# i18n/en/noctua.ftl
#
# Localization strings for Noctua's user interface (English).
## Application metadata
noctua-app-name = Noctua
noctua-app-description = A wise document and image viewer for the COSMIC™ desktop
## Main window
window-title = { $filename ->
*[none] Noctua
*[some] { $filename } — Noctua
}
## Menu entries
menu-file-open = Open…
menu-file-quit = Quit
menu-view-zoom-in = Zoom In
menu-view-zoom-out = Zoom Out
menu-view-zoom-reset = Reset Zoom
menu-view-flip-horizontal = Flip Horizontally
menu-view-flip-vertical = Flip Vertically
menu-view-rotate-cw = Rotate Clockwise
menu-view-rotate-ccw = Rotate Counter-Clockwise
## Note messages
no_document_loaded = No document loaded.
## Labels
zoom = Zoom
## Error messages
error-failed-to-open = Failed to open “{ $path }”.
error-unsupported-format = Unsupported file format.

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# Name of the application's binary.
name := 'noctua'
# The unique ID of the application.
appid := 'org.codeberg.wfx.Noctua'
# Path to root file system, which defaults to `/`.
rootdir := ''
# The prefix for the `/usr` directory.
prefix := '/usr'
# The location of the cargo target directory.
cargo-target-dir := env('CARGO_TARGET_DIR', 'target')
# Application's appstream metadata
appdata := appid + '.metainfo.xml'
# Application's desktop entry
desktop := appid + '.desktop'
# Application's icon.
icon-svg := appid + '.svg'
# Install destinations
base-dir := absolute_path(clean(rootdir / prefix))
appdata-dst := base-dir / 'share' / 'appdata' / appdata
bin-dst := base-dir / 'bin' / name
desktop-dst := base-dir / 'share' / 'applications' / desktop
icons-dst := base-dir / 'share' / 'icons' / 'hicolor'
icon-svg-dst := icons-dst / 'scalable' / 'apps'
# Default recipe which runs `just build-release`
default: build-release
# Runs `cargo clean`
clean:
cargo clean
# Removes vendored dependencies
clean-vendor:
rm -rf .cargo vendor vendor.tar
# `cargo clean` and removes vendored dependencies
clean-dist: clean clean-vendor
# Compiles with debug profile
build-debug *args:
cargo build {{args}}
# Compiles with release profile
build-release *args: (build-debug '--release' args)
# Compiles release profile with vendored dependencies
build-vendored *args: vendor-extract (build-release '--frozen --offline' args)
# Runs a clippy check
check *args:
cargo clippy --all-features {{args}} -- -W clippy::pedantic
# Runs a clippy check with JSON message format
check-json: (check '--message-format=json')
# Run the application for testing purposes
run *args:
env RUST_BACKTRACE=full cargo run --release {{args}}
# Installs files
install:
install -Dm0755 {{ cargo-target-dir / 'release' / name }} {{bin-dst}}
install -Dm0644 {{ 'resources' / desktop }} {{desktop-dst}}
install -Dm0644 {{ 'resources' / appdata }} {{appdata-dst}}
install -Dm0644 {{ 'resources' / 'icons' / 'hicolor' / 'scalable' / 'apps' / 'icon.svg' }} {{icon-svg-dst}}
# Uninstalls installed files
uninstall:
rm {{bin-dst}} {{desktop-dst}} {{icon-svg-dst}}
# Vendor dependencies locally
vendor:
mkdir -p .cargo
cargo vendor | head -n -1 > .cargo/config.toml
echo 'directory = "vendor"' >> .cargo/config.toml
tar pcf vendor.tar vendor
rm -rf vendor
# Extracts vendored dependencies
vendor-extract:
rm -rf vendor
tar pxf vendor.tar
# Bump cargo version, create git commit, and create tag
tag version:
find -type f -name Cargo.toml -exec sed -i '0,/^version/s/^version.*/version = "{{version}}"/' '{}' \; -exec git add '{}' \;
cargo check
cargo clean
git add Cargo.lock
git commit -m 'release: {{version}}'
git commit --amend
git tag -a {{version}} -m ''

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[Desktop Entry]
Name=Noctua
Comment=A wise document and image viewer for the COSMIC™ desktop
Type=Application
Icon=org.codeberg.wfx.Noctua
Exec=noctua %F
Terminal=false
Type=Application
StartupNotify=true
Categories=Graphics;Viewer;Utility;
StartupWMClass=noctua
Keywords=image;document;pdf;viewer;cosmic;
MimeType=

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<!-- SPDX-License-Identifier: MPL-2.0 -->
<!-- resources/app.metainfo.xml -->
<!-- AppStream metadata for software centers (e.g., COSMIC Store, GNOME Software, KDE Discover). -->
<?xml version="1.0" encoding="UTF-8" ?>
<component type="desktop-application">
<id>org.codeberg.wfx.Noctua</id>
<metadata_license>CC0-1.0</metadata_license>
<project_license>MPL-2.0</project_license>
<name>Noctua</name>
<summary>A wise document and image viewer for the COSMIC™ desktop</summary>
<description>
<p>
Noctua is a lightweight, mouse, touch and keyboard-driven viewer for images, PDFs, and vector graphics.
Built with Rust and libcosmic, it integrates seamlessly with COSMIC™ and GTK-based desktops.
</p>
</description>
<icon type="remote" width="64" height="64" scale="1">
https://codeberg.org/wfx/comsic-image-viewer/raw/main/resources/icons/hicolor/scalable/apps/icon.svg
</icon>
<url type="vcs-browser">https://codeberg.org/wfx/comsic-image-viewer</url>
<launchable type="desktop-id">org.codeberg.wfx.Noctua.desktop</launchable>
<provides>
<id>org.codeberg.wfx.Noctua</id>
<binaries>
<binary>noctua</binary>
</binaries>
</provides>
<requires>
<display_length compare="ge">360</display_length>
</requires>
<supports>
<control>keyboard</control>
<control>pointing</control>
<control>touch</control>
</supports>
<categories>
<category>Graphics</category>
<category>Viewer</category>
<category>Utility</category>
</categories>
<keywords>
<keyword>image</keyword>
<keyword>document</keyword>
<keyword>pdf</keyword>
<keyword>viewer</keyword>
<keyword>cosmic</keyword>
</keywords>
<content_rating type="oars-1.1" />
</component>

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<?xml version="1.0" encoding="UTF-8"?>
<svg viewBox="0 0 128 128" xmlns="http://www.w3.org/2000/svg"/>
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<!-- SPDX-License-Identifier: MPL-2.0 -->
<!-- resources/icons/hicolor/scalable/apps/org.noctua.Noctua.svg -->
<!-- Stylized owl icon for Noctua, with one eye as a document/magnifying glass. -->
<svg width="256" height="256" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg">
<!-- Background circle (optional, for contrast) -->
<circle cx="12" cy="12" r="10" fill="#2a2a4a" opacity="0.8"/>
<!-- Owl body (stylized) -->
<path d="M12 4C7 4 3 8 3 13v6l4-2 4 2 4-2 4 2v-6c0-5-4-9-9-9z"
fill="#2a2a4a" stroke="#e0e0e0" stroke-width="0.3"/>
<!-- Left eye (normal, small) -->
<circle cx="8" cy="10" r="1.8" fill="#ffd700" stroke="#333" stroke-width="0.2"/>
<circle cx="8" cy="10" r="0.8" fill="#333"/>
<!-- Right eye (document/magnifying glass, large) -->
<rect x="14" y="8" width="3" height="4" fill="white" rx="0.5" stroke="#333" stroke-width="0.2"/>
<path d="M15.5 9.5h-2v1h2v-1z" fill="#333" opacity="0.3"/> <!-- Document lines -->
<path d="M15.5 11.5h-2v1h2v-1z" fill="#333" opacity="0.3"/>
<path d="M15.5 10.5h-1v1h1v-1z" fill="#333" opacity="0.3"/>
<path d="M13 8.5a2.5 2.5 0 0 1 5 0" stroke="#333" stroke-width="0.3" fill="none"/> <!-- Magnifying glass handle -->
<!-- Beak (arrow-shaped) -->
<path d="M12 14l-1 1.5M12 14l1 1.5" stroke="#ffd700" stroke-width="0.5" fill="none"/>
<!-- Feathers (wisdom symbols) -->
<path d="M8 5c-1 0-2 1-2 2" stroke="#e0e0e0" stroke-width="0.3" fill="none"/>
<path d="M10 4c-1 1-1 2 0 3" stroke="#e0e0e0" stroke-width="0.3" fill="none"/>
<path d="M16 4c1 1 1 2 0 3" stroke="#e0e0e0" stroke-width="0.3" fill="none"/>
</svg>
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# rustfmt.toml
reorder_imports = false
reorder_modules = false
imports_granularity = "Preserve"
group_imports = "Preserve"

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// SPDX-License-Identifier: MPL-2.0 OR Apache-2.0
// src/app/document/file.rs
//
// Opening files and dispatching to the correct concrete document type.
use std::path::PathBuf;
use anyhow::anyhow;
use super::portable::PortableDocument;
use super::raster::RasterDocument;
use super::vector::VectorDocument;
use super::{DocumentContent, DocumentKind};
/// Open a document from a file path and dispatch to the correct type.
///
/// Raster formats are delegated to the `image` crate, which decides
/// based on enabled codecs (e.g. default-formats).
pub fn open_document(path: PathBuf) -> anyhow::Result<DocumentContent> {
let kind = DocumentKind::from_path(&path)
.ok_or_else(|| anyhow!("Unsupported document type: {:?}", path))?;
let content = match kind {
DocumentKind::Raster => {
let raster = RasterDocument::open(path)?;
DocumentContent::Raster(raster)
}
DocumentKind::Vector => {
let vector = VectorDocument::open(path)?;
DocumentContent::Vector(vector)
}
DocumentKind::Portable => {
let portable = PortableDocument::open(path)?;
DocumentContent::Portable(portable)
}
};
Ok(content)
}

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// SPDX-License-Identifier: MPL-2.0
// src/app/document/meta.rs

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// SPDX-License-Identifier: MPL-2.0 OR Apache-2.0
// src/app/document/mod.rs
//
// Document module root: common enums and type erasure for document kinds.
pub mod file;
pub mod meta;
pub mod portable;
pub mod raster;
pub mod transform;
pub mod utils;
pub mod vector;
use cosmic::iced::widget::image as iced_image;
use cosmic::iced_renderer::graphics::image::image_rs::ImageFormat as CosmicImageFormat;
use std::fmt;
use std::path::{Path, PathBuf};
use self::portable::PortableDocument;
use self::raster::RasterDocument;
use self::vector::VectorDocument;
/// High-level classification of documents.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum DocumentKind {
Raster,
Vector,
Portable,
}
/// Unified document type used by the application.
pub enum DocumentContent {
Raster(RasterDocument),
Vector(VectorDocument),
Portable(PortableDocument),
}
impl fmt::Debug for DocumentContent {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
DocumentContent::Raster(_) => f.write_str("DocumentContent::Raster(..)"),
DocumentContent::Vector(_) => f.write_str("DocumentContent::Vector(..)"),
DocumentContent::Portable(_) => f.write_str("DocumentContent::Portable(..)"),
}
}
}
impl DocumentKind {
/// Derive document kind from file extension.
///
/// - `pdf` => Portable
/// - `svg` => Vector
/// - supported image extensions (via libcosmic/image_rs ImageFormat)
/// => Raster
///
/// Returns `None` if the extension is not recognized as any supported kind.
pub fn from_path(path: &Path) -> Option<Self> {
let ext_os = path.extension()?;
let ext_str = ext_os.to_str()?;
let ext_lower = ext_str.to_ascii_lowercase();
match ext_lower.as_str() {
"pdf" => return Some(DocumentKind::Portable),
"svg" => return Some(DocumentKind::Vector),
_ => {}
}
// Ask libcosmic/image_rs if this extension corresponds to a known image
// format. If yes, we treat it as a raster document.
if CosmicImageFormat::from_extension(ext_os).is_some() {
return Some(DocumentKind::Raster);
}
None
}
}
impl DocumentContent {
/// Returns a cloneable image handle for rendering.
///
/// This is intentionally linear: every concrete document type
/// owns some kind of `iced_image::Handle`, and the canvas can
/// just call `doc.handle()` without additional branching.
pub fn handle(&self) -> iced_image::Handle {
match self {
DocumentContent::Raster(doc) => doc.handle.clone(),
DocumentContent::Vector(doc) => doc.handle.clone(),
DocumentContent::Portable(doc) => doc.handle.clone(),
}
}
/// Returns the underlying filesystem path of this document, if any.
pub fn path(&self) -> Option<&PathBuf> {
match self {
DocumentContent::Raster(doc) => doc.path.as_ref(),
DocumentContent::Vector(doc) => Some(&doc.path),
DocumentContent::Portable(doc) => Some(&doc.path),
}
}
/// Returns the native dimensions (width, height) of the document in pixels.
///
/// For raster images this is the actual pixel size.
/// For vector/portable documents this is the rasterized size at default DPI.
pub fn dimensions(&self) -> (u32, u32) {
match self {
DocumentContent::Raster(doc) => doc.dimensions(),
DocumentContent::Vector(doc) => doc.dimensions(),
DocumentContent::Portable(doc) => doc.dimensions(),
}
}
}

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// SPDX-License-Identifier: MPL-2.0 OR Apache-2.0
// src/app/document/portable.rs
//
// Portable documents (e.g. PDF) – basic model and rendering stub.
use std::path::PathBuf;
use cosmic::iced::widget::image as iced_image;
use image::{GenericImageView, DynamicImage};
/// Represents a portable document (PDF).
pub struct PortableDocument {
pub path: PathBuf,
pub page_count: u32,
pub current_page: u32,
pub rotation: i32, // 0, 90, 180, 270; kept for future backend integration
pub rendered: DynamicImage,
pub handle: iced_image::Handle,
// TODO: internal PDF handle from chosen backend
}
impl PortableDocument {
/// Open a portable document and render the first page.
///
/// Currently this uses a dummy 1x1 transparent image as placeholder.
pub fn open(path: PathBuf) -> anyhow::Result<Self> {
// TODO: open PDF and render first page using a proper backend.
let dummy = DynamicImage::new_rgba8(1, 1);
let handle = Self::build_handle(&dummy);
Ok(Self {
path,
page_count: 1, // TODO: query real page count from backend
current_page: 0,
rotation: 0,
rendered: dummy,
handle,
})
}
/// Construct an iced image handle from a DynamicImage.
fn build_handle(img: &DynamicImage) -> iced_image::Handle {
let (w, h) = img.dimensions();
let rgba = img.to_rgba8();
let pixels = rgba.into_raw();
iced_image::Handle::from_rgba(w, h, pixels)
}
/// Rebuild the handle after mutating `rendered`.
pub fn refresh_handle(&mut self) {
self.handle = Self::build_handle(&self.rendered);
}
/// Returns the dimensions of the currently rendered page.
pub fn dimensions(&self) -> (u32, u32) {
self.rendered.dimensions()
}
/// Re-render the current page with the current rotation.
pub fn rerender_page(&mut self) {
// TODO: use PDF backend and self.rotation / self.current_page
// self.rendered = render_page_to_dynamic(...);
// self.refresh_handle();
}
}

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// SPDX-License-Identifier: MPL-2.0
// src/app/document/raster.rs
use std::path::PathBuf;
use cosmic::iced::widget::image as iced_image;
use image::{GenericImageView, DynamicImage, ImageReader};
/// Represents a raster image document (PNG, JPEG, WebP, ...).
pub struct RasterDocument {
pub path: Option<PathBuf>,
pub image: DynamicImage,
pub handle: iced_image::Handle,
}
impl RasterDocument {
/// Load a raster document from disk.
pub fn open(path: PathBuf) -> image::ImageResult<Self> {
let img = ImageReader::open(&path)?.decode()?;
let handle = Self::build_handle(&img);
Ok(Self {
path: Some(path),
image: img,
handle,
})
}
/// Construct a handle from a DynamicImage.
fn build_handle(img: &DynamicImage) -> iced_image::Handle {
// Get image dimensions.
let (w, h) = img.dimensions();
// Convert to RGBA8 buffer and extract raw bytes.
let rgba = img.to_rgba8();
let pixels = rgba.into_raw(); // Vec<u8>
// Build an iced image handle from raw RGBA pixels.
iced_image::Handle::from_rgba(w, h, pixels)
}
/// Rebuild the handle after mutating `image`.
pub fn refresh_handle(&mut self) {
self.handle = Self::build_handle(&self.image);
}
/// Returns the native pixel dimensions (width, height).
pub fn dimensions(&self) -> (u32, u32) {
self.image.dimensions()
}
/// Save the current image back to disk (overwrite).
pub fn save(&self) -> image::ImageResult<()> {
if let Some(path) = &self.path {
self.image.save(path)
} else {
// Cant imagine that it happen but caller should handle missing path case.
Err(image::ImageError::Parameter(
image::error::ParameterError::from_kind(image::error::ParameterErrorKind::Generic(
"RasterDocument does not have a path".into(),
)),
))
}
}
}

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// SPDX-License-Identifier: MPL-2.0 OR Apache-2.0
// src/app/document/transform.rs
//
// High-level document transformations (rotate, flip, etc.).
use image::{imageops, DynamicImage};
use super::portable::PortableDocument;
use super::raster::RasterDocument;
use super::vector::VectorDocument;
use super::DocumentContent;
/// Rotate current document 90 degrees clockwise.
pub fn rotate_cw(doc: &mut DocumentContent) {
match doc {
DocumentContent::Raster(raster) => rotate_cw_raster(raster),
DocumentContent::Vector(vector) => rotate_cw_vector(vector),
DocumentContent::Portable(portable) => rotate_cw_portable(portable),
}
}
/// Rotate current document 90 degrees counter-clockwise.
pub fn rotate_ccw(doc: &mut DocumentContent) {
match doc {
DocumentContent::Raster(raster) => rotate_ccw_raster(raster),
DocumentContent::Vector(vector) => rotate_ccw_vector(vector),
DocumentContent::Portable(portable) => rotate_ccw_portable(portable),
}
}
/// Flip current document horizontally.
pub fn flip_horizontal(doc: &mut DocumentContent) {
match doc {
DocumentContent::Raster(raster) => flip_horizontal_raster(raster),
DocumentContent::Vector(vector) => flip_horizontal_vector(vector),
DocumentContent::Portable(portable) => flip_horizontal_portable(portable),
}
}
/// Flip current document vertically.
pub fn flip_vertical(doc: &mut DocumentContent) {
match doc {
DocumentContent::Raster(raster) => flip_vertical_raster(raster),
DocumentContent::Vector(vector) => flip_vertical_vector(vector),
DocumentContent::Portable(portable) => flip_vertical_portable(portable),
}
}
// --- Raster implementations ---------------------------------------------------
fn rotate_cw_raster(doc: &mut RasterDocument) {
doc.image = DynamicImage::ImageRgba8(imageops::rotate90(&doc.image));
doc.refresh_handle();
}
fn rotate_ccw_raster(doc: &mut RasterDocument) {
doc.image = DynamicImage::ImageRgba8(imageops::rotate270(&doc.image));
doc.refresh_handle();
}
fn flip_horizontal_raster(doc: &mut RasterDocument) {
doc.image = DynamicImage::ImageRgba8(imageops::flip_horizontal(&doc.image));
doc.refresh_handle();
}
fn flip_vertical_raster(doc: &mut RasterDocument) {
doc.image = DynamicImage::ImageRgba8(imageops::flip_vertical(&doc.image));
doc.refresh_handle();
}
// --- Portable implementations (operate on rendered image) ---------------------
fn rotate_cw_portable(doc: &mut PortableDocument) {
// Keep rotation in sync for a future real PDF backend.
doc.rotation = (doc.rotation + 90).rem_euclid(360);
doc.rendered = DynamicImage::ImageRgba8(imageops::rotate90(&doc.rendered));
doc.refresh_handle();
}
fn rotate_ccw_portable(doc: &mut PortableDocument) {
doc.rotation = (doc.rotation - 90).rem_euclid(360);
doc.rendered = DynamicImage::ImageRgba8(imageops::rotate270(&doc.rendered));
doc.refresh_handle();
}
fn flip_horizontal_portable(doc: &mut PortableDocument) {
doc.rendered = DynamicImage::ImageRgba8(imageops::flip_horizontal(&doc.rendered));
doc.refresh_handle();
}
fn flip_vertical_portable(doc: &mut PortableDocument) {
doc.rendered = DynamicImage::ImageRgba8(imageops::flip_vertical(&doc.rendered));
doc.refresh_handle();
}
// --- Vector implementations (view-transform only, for now) --------------------
fn rotate_cw_vector(_doc: &mut VectorDocument) {
// TODO: either update a rotation property or re-rasterize with rotation.
}
fn rotate_ccw_vector(_doc: &mut VectorDocument) {
// TODO: either update a rotation property or re-rasterize with rotation.
}
fn flip_horizontal_vector(_doc: &mut VectorDocument) {
// TODO: apply horizontal flip to SVG or adjust view transform.
}
fn flip_vertical_vector(_doc: &mut VectorDocument) {
// TODO: apply vertical flip to SVG or adjust view transform.
}

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// SPDX-License-Identifier: MPL-2.0
// src/app/document/utils.rs

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// SPDX-License-Identifier: MPL-2.0
// src/app/document/vector.rs
//
// Vector documents (SVG, etc.).
use std::path::PathBuf;
use cosmic::iced::widget::image as iced_image;
/// Represents a vector document such as SVG.
/// For now this only stores the raw data and a rasterized handle.
pub struct VectorDocument {
pub path: PathBuf,
pub raw_data: String,
pub handle: iced_image::Handle,
/// Cached dimensions of the rasterized representation.
pub width: u32,
pub height: u32,
}
impl VectorDocument {
pub fn open(path: PathBuf) -> anyhow::Result<Self> {
let raw_data = std::fs::read_to_string(&path)?;
// TODO: proper SVG parsing and rendering.
// For now, use a placeholder size based on a typical default.
let (width, height) = (800, 600);
let handle = iced_image::Handle::from_rgba(1, 1, vec![0, 0, 0, 0]);
Ok(Self {
path,
raw_data,
handle,
width,
height,
})
}
/// Returns the dimensions of the rasterized representation.
pub fn dimensions(&self) -> (u32, u32) {
(self.width, self.height)
}
pub fn refresh_handle(&mut self) {
// TODO: re-render SVG to DynamicImage and rebuild handle.
// Update self.width and self.height accordingly.
}
}

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// SPDX-License-Identifier: MPL-2.0 OR Apache-2.0
// src/app/message.rs
//
// Top-level application messages (events, IO, and UI signals).
use std::path::PathBuf;
/// Top-level application messages.
///
/// These are produced by:
/// - UI widgets (buttons, menus, etc.)
/// - keyboard shortcuts
/// - async tasks (file loading, etc.)
#[derive(Debug, Clone)]
pub enum AppMessage {
/// User requested to open a single file.
OpenPath(PathBuf),
/// Navigate to next/previous document in the current folder.
NextDocument,
PrevDocument,
/// Basic view / panel toggles.
ToggleLeftPanel,
ToggleRightPanel,
/// View / zoom control.
ZoomIn,
ZoomOut,
ZoomReset,
ZoomFit,
/// Pan control (Ctrl + arrow keys).
PanLeft,
PanRight,
PanUp,
PanDown,
PanReset,
/// Editing / tool modes.
ToggleCropMode,
ToggleScaleMode,
/// Document transformations.
FlipHorizontal,
FlipVertical,
RotateCW,
RotateCCW,
/// Generic error reporting from lower layers.
ShowError(String),
ClearError,
/// Fallback for unhandled or no-op cases.
NoOp,
}

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// SPDX-License-Identifier: MIT OR Apache-2.0
// src/app/mod.rs
//
// Application module root, re-exports, and COSMIC application wiring.
pub mod document;
pub mod message;
pub mod model;
pub mod update;
// UI is kept as an internal detail of this module.
mod view;
use std::fs;
use std::path::{Path, PathBuf};
use cosmic::app::Core;
use cosmic::iced::keyboard::{self, Key, Modifiers};
use cosmic::iced::keyboard::key::Named;
use cosmic::iced::window;
use cosmic::iced::Subscription;
use cosmic::{Action, Element, Task};
pub use message::AppMessage;
pub use model::AppModel;
use crate::config::AppConfig;
use crate::Args;
/// Flags passed from `main` into the application.
/// Currently we only forward the parsed CLI `Args`.
#[derive(Debug, Clone)]
pub enum Flags {
Args(Args),
}
/// Main application type.
pub struct Noctua {
core: Core,
pub model: AppModel,
}
impl cosmic::Application for Noctua {
type Executor = cosmic::SingleThreadExecutor;
type Flags = Flags;
type Message = AppMessage;
const APP_ID: &'static str = "org.codeberg.wfx.Noctua";
fn core(&self) -> &Core {
&self.core
}
fn core_mut(&mut self) -> &mut Core {
&mut self.core
}
fn init(core: Core, flags: Self::Flags) -> (Self, Task<Action<Self::Message>>) {
// Load persistent configuration at startup.
let config = AppConfig::default();
// Create initial application model from configuration.
let mut model = AppModel::new(config);
// Use CLI arguments from `flags` to open initial file or folder.
let Flags::Args(args) = flags;
if let Some(path) = args.file {
open_initial_path(&mut model, path);
}
(Self { core, model }, Task::none())
}
fn on_close_requested(&self, _id: window::Id) -> Option<Self::Message> {
// Return a message here if you want to handle close requests in update().
None
}
fn update(&mut self, message: Self::Message) -> Task<Action<Self::Message>> {
// Delegate to the domain update logic.
update::update(&mut self.model, message);
Task::none()
}
fn view(&self) -> Element<Self::Message> {
// Main application window view.
view::view(&self.model)
}
fn view_window(&self, _id: window::Id) -> Element<Self::Message> {
// For now, we only have a single window, so reuse the main view.
self.view()
}
fn subscription(&self) -> Subscription<Self::Message> {
// Global keyboard handler: maps key presses to AppMessage.
keyboard::on_key_press(handle_key_press)
}
}
/// Open the initial path passed on the command line.
///
/// If `path` is a directory, this will collect supported documents inside it,
/// open the first one, and initialize navigation state. If it is a file, the
/// file is opened directly and the surrounding folder is scanned.
fn open_initial_path(model: &mut AppModel, path: PathBuf) {
if path.is_dir() {
open_from_directory(model, &path);
} else {
open_single_file(model, &path);
}
}
/// Open the first supported document from the given directory and
/// populate folder navigation state.
fn open_from_directory(model: &mut AppModel, dir: &Path) {
let mut entries: Vec<PathBuf> = Vec::new();
if let Ok(read_dir) = fs::read_dir(dir) {
for entry in read_dir.flatten() {
let path = entry.path();
// Only keep regular files that are recognized as supported documents.
if path.is_file() && document::DocumentKind::from_path(&path).is_some() {
entries.push(path);
}
}
}
entries.sort();
let first = match entries.first().cloned() {
Some(path) => path,
None => {
model.set_error(format!(
"No supported documents found in directory: {}",
dir.display()
));
return;
}
};
model.folder_entries = entries;
model.current_index = Some(0);
open_single_file(model, &first);
}
/// Open a single file, update current path and refresh folder entries.
fn open_single_file(model: &mut AppModel, path: &Path) {
match document::file::open_document(path.to_path_buf()) {
Ok(doc) => {
model.document = Some(doc);
model.current_path = Some(path.to_path_buf());
model.clear_error();
// Reset view state for new document.
model.reset_pan();
model.zoom = 1.0;
model.view_mode = model::ViewMode::Fit;
// Refresh folder listing based on parent directory.
if let Some(parent) = path.parent() {
refresh_folder_entries(model, parent, path);
}
}
Err(err) => {
model.document = None;
model.current_path = None;
model.set_error(err.to_string());
}
}
}
/// Refresh the `folder_entries` list and current index based on the
/// given folder and currently active file.
fn refresh_folder_entries(model: &mut AppModel, folder: &Path, current: &Path) {
let mut entries: Vec<PathBuf> = Vec::new();
if let Ok(read_dir) = fs::read_dir(folder) {
for entry in read_dir.flatten() {
let path = entry.path();
// Only keep regular files that are recognized as supported documents.
if path.is_file() && document::DocumentKind::from_path(&path).is_some() {
entries.push(path);
}
}
}
entries.sort();
// Determine current index.
let current_index = entries.iter().position(|p| p == current);
model.folder_entries = entries;
model.current_index = current_index;
}
/// Map raw key presses + modifiers into high-level application messages.
///
/// This function is used by `keyboard::on_key_press` and must be a plain
/// function pointer (no captures).
fn handle_key_press(key: Key, modifiers: Modifiers) -> Option<AppMessage> {
use AppMessage::*;
// Handle Ctrl + arrow keys for panning.
if modifiers.control() && !modifiers.shift() && !modifiers.alt() && !modifiers.logo() {
return match key.as_ref() {
Key::Named(Named::ArrowLeft) => Some(PanLeft),
Key::Named(Named::ArrowRight) => Some(PanRight),
Key::Named(Named::ArrowUp) => Some(PanUp),
Key::Named(Named::ArrowDown) => Some(PanDown),
_ => None,
};
}
// Ignore key presses when other "command-style" modifiers are pressed,
// so we do not conflict with system- / desktop-level shortcuts.
if modifiers.command() || modifiers.alt() || modifiers.logo() || modifiers.control() {
return None;
}
match key.as_ref() {
// Navigation with arrow keys (no modifiers).
Key::Named(Named::ArrowRight) => Some(NextDocument),
Key::Named(Named::ArrowLeft) => Some(PrevDocument),
// Character keys (case-insensitive where it makes sense).
Key::Character(ch) if ch.eq_ignore_ascii_case("h") => Some(FlipHorizontal),
Key::Character(ch) if ch.eq_ignore_ascii_case("v") => Some(FlipVertical),
Key::Character(ch) if ch.eq_ignore_ascii_case("r") => {
// "r" without Shift => RotateCW
// "r" with Shift => RotateCCW
if modifiers.shift() {
Some(RotateCCW)
} else {
Some(RotateCW)
}
}
// Zoom
Key::Character("+") | Key::Character("=") => Some(ZoomIn),
Key::Character("-") => Some(ZoomOut),
Key::Character("1") => Some(ZoomReset),
Key::Character(ch) if ch.eq_ignore_ascii_case("f") => Some(ZoomFit),
// Tool modes
Key::Character(ch) if ch.eq_ignore_ascii_case("c") => Some(ToggleCropMode),
Key::Character(ch) if ch.eq_ignore_ascii_case("s") => Some(ToggleScaleMode),
// Reset pan with "0"
Key::Character("0") => Some(PanReset),
_ => None,
}
}

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// SPDX-License-Identifier: MIT OR Apache-2.0
// src/app/model.rs
//
// Global application state.
use std::path::PathBuf;
use crate::config::AppConfig;
use crate::app::document::DocumentContent;
/// How the document is currently fitted into the window.
#[derive(Debug, Clone)]
pub enum ViewMode {
/// Fit document to available window size.
Fit,
/// Display at 100% (1.0 scale).
ActualSize,
/// Custom zoom factor.
Custom(f32),
}
/// Current editing / interaction mode.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum ToolMode {
None,
Crop,
Scale,
}
/// Pan step size in pixels per key press.
pub const PAN_STEP: f32 = 50.0;
/// Global application state.
#[derive(Debug)]
pub struct AppModel {
/// Static configuration loaded at startup.
pub config: AppConfig,
/// Currently opened document (raster/vector/portable).
pub document: Option<DocumentContent>,
/// Path of the currently opened document, if any.
pub current_path: Option<PathBuf>,
/// List of files in the current folder for navigation.
pub folder_entries: Vec<PathBuf>,
/// Index into `folder_entries` of the current file.
pub current_index: Option<usize>,
/// View / zoom state.
pub view_mode: ViewMode,
pub zoom: f32,
/// Pan offset (in pixels, relative to centered position).
pub pan_x: f32,
pub pan_y: f32,
/// Panel visibility.
pub show_left_panel: bool,
pub show_right_panel: bool,
/// Current tool mode.
pub tool_mode: ToolMode,
/// Last error message to be shown in the UI, if any.
pub error: Option<String>,
}
impl AppModel {
/// Construct a new application state from configuration.
pub fn new(config: AppConfig) -> Self {
Self {
config,
document: None,
current_path: None,
folder_entries: Vec::new(),
current_index: None,
view_mode: ViewMode::Fit,
zoom: 1.0,
pan_x: 0.0,
pan_y: 0.0,
show_left_panel: false,
show_right_panel: false,
tool_mode: ToolMode::None,
error: None,
}
}
/// Helper: set an error string.
pub fn set_error<S: Into<String>>(&mut self, msg: S) {
self.error = Some(msg.into());
}
/// Helper: clear current error.
pub fn clear_error(&mut self) {
self.error = None;
}
/// Reset pan offset to center.
pub fn reset_pan(&mut self) {
self.pan_x = 0.0;
self.pan_y = 0.0;
}
}

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// SPDX-License-Identifier: MPL-2.0 OR Apache-2.0
// src/app/update.rs
//
// Application update loop: applies messages to the global model state.
use std::fs;
use std::path::{Path, PathBuf};
use super::document;
use super::message::AppMessage;
use super::model::{AppModel, ToolMode, ViewMode, PAN_STEP};
/// Central update function applying messages to the model.
///
/// This is the single place where application state is mutated.
pub fn update(model: &mut AppModel, msg: AppMessage) {
// Debug output: log every received message.
println!("update(): received message: {:?}", msg);
match msg {
// ===== File / navigation ==========================================================
AppMessage::OpenPath(path) => {
open_single_path(model, path);
}
AppMessage::NextDocument => {
go_to_next_document(model);
}
AppMessage::PrevDocument => {
go_to_prev_document(model);
}
// ===== Panels =====================================================================
AppMessage::ToggleLeftPanel => {
model.show_left_panel = !model.show_left_panel;
}
AppMessage::ToggleRightPanel => {
model.show_right_panel = !model.show_right_panel;
}
// ===== View / zoom ===============================================================
AppMessage::ZoomIn => zoom_in(model),
AppMessage::ZoomOut => zoom_out(model),
AppMessage::ZoomReset => {
model.zoom = 1.0;
model.view_mode = ViewMode::ActualSize;
model.reset_pan();
}
AppMessage::ZoomFit => {
model.view_mode = ViewMode::Fit;
model.reset_pan();
}
// ===== Pan control (Ctrl + arrow keys) ===========================================
AppMessage::PanLeft => {
model.pan_x -= PAN_STEP;
}
AppMessage::PanRight => {
model.pan_x += PAN_STEP;
}
AppMessage::PanUp => {
model.pan_y -= PAN_STEP;
}
AppMessage::PanDown => {
model.pan_y += PAN_STEP;
}
AppMessage::PanReset => {
model.reset_pan();
}
// ===== Tools =====================================================================
AppMessage::ToggleCropMode => {
model.tool_mode = if model.tool_mode == ToolMode::Crop {
ToolMode::None
} else {
ToolMode::Crop
};
}
AppMessage::ToggleScaleMode => {
model.tool_mode = if model.tool_mode == ToolMode::Scale {
ToolMode::None
} else {
ToolMode::Scale
};
}
// ===== Document transformations ==================================================
AppMessage::FlipHorizontal => {
if let Some(doc) = &mut model.document {
document::transform::flip_horizontal(doc);
}
}
AppMessage::FlipVertical => {
if let Some(doc) = &mut model.document {
document::transform::flip_vertical(doc);
}
}
AppMessage::RotateCW => {
if let Some(doc) = &mut model.document {
document::transform::rotate_cw(doc);
}
}
AppMessage::RotateCCW => {
if let Some(doc) = &mut model.document {
document::transform::rotate_ccw(doc);
}
}
// ===== Error handling ============================================================
AppMessage::ShowError(msg) => {
model.set_error(msg);
}
AppMessage::ClearError => {
model.clear_error();
}
AppMessage::NoOp => {
// Intentionally do nothing.
}
}
}
/// Open a single path, refreshing navigation context.
fn open_single_path(model: &mut AppModel, path: PathBuf) {
// Try to load the concrete document type (raster/vector/portable).
match document::file::open_document(path.clone()) {
Ok(doc) => {
// Update current document.
model.document = Some(doc);
model.current_path = Some(path.clone());
model.clear_error();
// Reset view state for new document.
model.reset_pan();
model.zoom = 1.0;
model.view_mode = ViewMode::Fit;
// Refresh folder listing based on parent directory.
if let Some(parent) = path.parent() {
refresh_folder_entries(model, parent, &path);
}
}
Err(err) => {
model.document = None;
model.current_path = None;
model.set_error(err.to_string());
}
}
}
/// Refresh the `folder_entries` list and current index.
fn refresh_folder_entries(model: &mut AppModel, folder: &Path, current: &Path) {
let mut entries: Vec<PathBuf> = Vec::new();
if let Ok(read_dir) = fs::read_dir(folder) {
for entry in read_dir.flatten() {
let path = entry.path();
// Only keep files that are recognized as supported documents.
if document::DocumentKind::from_path(&path).is_some() {
entries.push(path);
}
}
}
entries.sort();
// Determine current index.
let current_index = entries.iter().position(|p| p == current);
model.folder_entries = entries;
model.current_index = current_index;
}
/// Go to next document in the current folder, if any.
fn go_to_next_document(model: &mut AppModel) {
let len = model.folder_entries.len();
let Some(idx) = model.current_index else {
return;
};
if len == 0 {
return;
}
let next_idx = (idx + 1) % len;
if let Some(path) = model.folder_entries.get(next_idx).cloned() {
model.current_index = Some(next_idx);
open_single_path(model, path);
}
}
/// Go to previous document in the current folder, if any.
fn go_to_prev_document(model: &mut AppModel) {
let len = model.folder_entries.len();
let Some(idx) = model.current_index else {
return;
};
if len == 0 {
return;
}
let prev_idx = (idx + len - 1) % len;
if let Some(path) = model.folder_entries.get(prev_idx).cloned() {
model.current_index = Some(prev_idx);
open_single_path(model, path);
}
}
/// Increment zoom level.
fn zoom_in(model: &mut AppModel) {
let factor = 1.1_f32;
let new_zoom = (model.zoom * factor).clamp(0.05, 20.0);
model.zoom = new_zoom;
model.view_mode = ViewMode::Custom(new_zoom);
}
/// Decrement zoom level.
fn zoom_out(model: &mut AppModel) {
let factor = 1.0 / 1.1_f32;
let new_zoom = (model.zoom * factor).clamp(0.05, 20.0);
model.zoom = new_zoom;
model.view_mode = ViewMode::Custom(new_zoom);
}

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// SPDX-License-Identifier: MPL-2.0
// src/app/view/canvas.rs
//
// Center canvas for displaying the current document.
use cosmic::iced::{Alignment, Length};
use cosmic::widget::{container, image, text, Column, Row};
use cosmic::Element;
use crate::fl;
use crate::app::model::ViewMode;
use crate::app::{AppMessage, AppModel};
/// Render the center canvas area with the current document.
pub fn view(model: &AppModel) -> Element<'_, AppMessage> {
if let Some(doc) = &model.document {
let handle = doc.handle();
let img_widget = match &model.view_mode {
ViewMode::Fit => {
// Fit mode: image scales to fill container while preserving aspect ratio.
image::Image::new(handle)
.width(Length::Fill)
.height(Length::Fill)
}
ViewMode::ActualSize => {
// 1:1 pixel size.
let (native_w, native_h) = doc.dimensions();
image::Image::new(handle)
.width(Length::Fixed(native_w as f32))
.height(Length::Fixed(native_h as f32))
}
ViewMode::Custom(_) => {
// Custom zoom factor applied to native size.
let (native_w, native_h) = doc.dimensions();
let scaled_w = (native_w as f32 * model.zoom).round();
let scaled_h = (native_h as f32 * model.zoom).round();
image::Image::new(handle)
.width(Length::Fixed(scaled_w))
.height(Length::Fixed(scaled_h))
}
};
// Center the image both horizontally and vertically.
Column::new()
.width(Length::Fill)
.height(Length::Fill)
.align_x(Alignment::Center)
.push(
Row::new()
.push(img_widget)
.width(Length::Fill)
.height(Length::Fill)
.align_y(Alignment::Center),
)
.into()
} else {
container(text(fl!("no_document_loaded")))
.center_x(Length::Fill)
.center_y(Length::Fill)
.width(Length::Fill)
.height(Length::Fill)
.into()
}
}

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// SPDX-License-Identifier: MPL-2.0
// src/app/view/mod.rs
//
// Root layout for the main application window.
pub mod canvas;
pub mod panels;
use cosmic::Element;
use cosmic::iced::Length;
use cosmic::widget::{Column, Container, Row};
use crate::app::{AppMessage, AppModel};
/// Main window layout (header, center row, footer).
pub fn view(model: &AppModel) -> Element<'_, AppMessage> {
let header = panels::header(model);
let footer = panels::footer(model);
let left_panel = panels::left_panel(model);
let right_panel = panels::right_panel(model);
let canvas = canvas::view(model);
// Build middle row step by step to handle optional panels.
let mut middle_row = Row::new().spacing(8).height(Length::Fill);
if let Some(left) = left_panel {
middle_row = middle_row.push(left);
}
middle_row = middle_row.push(canvas);
if let Some(right) = right_panel {
middle_row = middle_row.push(right);
}
let content = Column::new()
.spacing(8)
.padding(8)
.width(Length::Fill)
.height(Length::Fill)
.push(header)
.push(middle_row)
.push(footer);
Container::new(content)
.width(Length::Fill)
.height(Length::Fill)
.into()
}

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// SPDX-License-Identifier: MPL-2.0
// src/app/view/panels.rs
//
// Header, footer, and side panels composing the main layout.
use cosmic::Element;
use cosmic::iced::{Alignment, Length};
use cosmic::widget::{self, Column, Container, Row, Text};
use crate::fl;
use crate::app::{AppMessage, AppModel};
/// Top header bar (global actions, toggles).
pub fn header(_model: &AppModel) -> Element<'_, AppMessage> {
let content = Row::new().spacing(8).align_y(Alignment::Center);
//.push(Text::new(fl!("noctua-app-name")).size(18));
// In a real implementation, add more buttons/actions here.
Container::new(content)
.width(Length::Fill)
.padding([4, 8])
.into()
}
/// Bottom footer bar (navigation & zoom).
pub fn footer(model: &AppModel) -> Element<'_, AppMessage> {
let nav = Row::new()
.spacing(4)
.align_y(Alignment::Center)
.push(widget::button::standard("<").on_press(AppMessage::PrevDocument))
.push(widget::button::standard(">").on_press(AppMessage::NextDocument));
let zoom_info = Text::new(format!("Zoom: {:.0}%", model.zoom * 100.0));
let content = Row::new()
.spacing(16)
.align_y(Alignment::Center)
.push(nav)
.push(zoom_info);
Container::new(content)
.width(Length::Fill)
.padding([4, 8])
.into()
}
/// Optional left panel (tools).
pub fn left_panel(model: &AppModel) -> Option<Element<'_, AppMessage>> {
if !model.show_left_panel {
return None;
}
let tools = Column::new()
.spacing(4)
.push(Text::new("Tools"))
.push(widget::button::standard("Crop").on_press(AppMessage::ToggleCropMode))
.push(widget::button::standard("Scale").on_press(AppMessage::ToggleScaleMode));
// Later: color pickers, marker tools, text tool, etc.
let panel = Container::new(tools)
.width(Length::Fixed(180.0))
.height(Length::Fill)
.padding(8);
Some(panel.into())
}
/// Optional right panel (metadata, info).
pub fn right_panel(model: &AppModel) -> Option<Element<'_, AppMessage>> {
if !model.show_right_panel {
return None;
}
let meta = Column::new()
.spacing(4)
.push(Text::new("Metadata"))
.push(Text::new(format!(
"Current index: {:?}",
model.current_index
)));
// Later: real EXIF / tags from model.metadata_cache
let panel = Container::new(meta)
.width(Length::Fixed(220.0))
.height(Length::Fill)
.padding(8);
Some(panel.into())
}

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// SPDX-License-Identifier: MPL-2.0
// src/config.rs
use cosmic::cosmic_config::{self, CosmicConfigEntry, cosmic_config_derive::CosmicConfigEntry};
use std::path::PathBuf;
/// Global configuration for the application.
#[derive(Debug, Clone, CosmicConfigEntry, Eq, PartialEq)]
#[version = 1]
pub struct AppConfig {
/// Optional default directory to open images from.
pub default_image_dir: Option<PathBuf>,
}
impl Default for AppConfig {
fn default() -> Self {
Self {
// TODO: Use xdg dir for picture
default_image_dir: Some(PathBuf::from("~/Pictures")),
}
}
}

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// SPDX-License-Identifier: MPL-2.0
// src/i18n.rs
use i18n_embed::{
DefaultLocalizer, LanguageLoader, Localizer,
fluent::{FluentLanguageLoader, fluent_language_loader},
unic_langid::LanguageIdentifier,
};
use rust_embed::RustEmbed;
use std::sync::LazyLock;
/// Applies the requested language(s) to requested translations from the `fl!()` macro.
pub fn init(requested_languages: &[LanguageIdentifier]) {
if let Err(why) = localizer().select(requested_languages) {
println!("error while loading fluent localizations: {why}");
}
}
// Get the `Localizer` to be used for localizing this library.
#[must_use]
pub fn localizer() -> Box<dyn Localizer> {
Box::from(DefaultLocalizer::new(&*LANGUAGE_LOADER, &Localizations))
}
#[derive(RustEmbed)]
#[folder = "i18n/"]
struct Localizations;
pub static LANGUAGE_LOADER: LazyLock<FluentLanguageLoader> = LazyLock::new(|| {
let loader: FluentLanguageLoader = fluent_language_loader!();
loader
.load_fallback_language(&Localizations)
.expect("Error while loading fallback language");
loader
});
/// Request a localized string by ID from the i18n/ directory.
#[macro_export]
macro_rules! fl {
($message_id:literal) => {{
i18n_embed_fl::fl!($crate::i18n::LANGUAGE_LOADER, $message_id)
}};
($message_id:literal, $($args:expr),*) => {{
i18n_embed_fl::fl!($crate::i18n::LANGUAGE_LOADER, $message_id, $($args), *)
}};
}

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// SPDX-License-Identifier: MPL-2.0
// src/main.rs
mod app;
mod config;
mod i18n;
use anyhow::Result;
use clap::Parser;
use cosmic::app::Settings;
use crate::app::Noctua;
#[derive(Parser, Debug, Clone)]
#[command(version, about)]
pub struct Args {
/// File to open on startup
#[arg(value_name = "FILE")]
pub file: Option<std::path::PathBuf>,
/// UI language (e.g. "en", "de")
#[arg(short, long, default_value = "en")]
pub language: String,
}
fn main() -> Result<()> {
// Get the system's preferred languages.
let requested_languages = i18n_embed::DesktopLanguageRequester::requested_languages();
// Enable localizations to be applied.
i18n::init(&requested_languages);
env_logger::init();
let args = Args::parse();
cosmic::app::run::<Noctua>(Settings::default(), app::Flags::Args(args))
.map_err(|e| anyhow::anyhow!(e))
}