commit 7ffec09d7b50f2554b51331166161352bd8edb13 Author: JasterV <49537445+JasterV@users.noreply.github.com> Date: Tue Aug 19 01:58:59 2025 +0200 feat: build an elm-like TUI application diff --git a/.github/dependabot.yml b/.github/dependabot.yml new file mode 100644 index 0000000..c2fabe1 --- /dev/null +++ b/.github/dependabot.yml @@ -0,0 +1,17 @@ +# To get started with Dependabot version updates, you'll need to specify which +# package ecosystems to update and where the package manifests are located. +# Please see the documentation for all configuration options: +# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates + +version: 2 +updates: + # Maintain dependencies for Cargo + - package-ecosystem: "cargo" + directory: "/" # Location of package manifests + schedule: + interval: "weekly" + # Maintain dependencies for GitHub Actions + - package-ecosystem: github-actions + directory: "/" + schedule: + interval: weekly diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml new file mode 100644 index 0000000..653741c --- /dev/null +++ b/.github/workflows/ci.yml @@ -0,0 +1,90 @@ +name: CI + +on: + pull_request: + push: + branches: + - main + - master + - develop + +env: + CARGO_TERM_COLOR: always + +# ensure that the workflow is only triggered once per PR, subsequent pushes to the PR will cancel +# and restart the workflow. See https://docs.github.com/en/actions/using-jobs/using-concurrency +concurrency: + group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }} + cancel-in-progress: true + +jobs: + fmt: + name: fmt + runs-on: ubuntu-latest + steps: + - name: Checkout + uses: actions/checkout@v4 + - name: Install Rust stable + uses: dtolnay/rust-toolchain@stable + with: + components: rustfmt + - name: check formatting + run: cargo fmt -- --check + - name: Cache Cargo dependencies + uses: Swatinem/rust-cache@v2 + clippy: + name: clippy + runs-on: ubuntu-latest + permissions: + contents: read + checks: write + steps: + - name: Checkout + uses: actions/checkout@v4 + - name: Install Rust stable + uses: dtolnay/rust-toolchain@stable + with: + components: clippy + - name: Run clippy action + uses: clechasseur/rs-clippy-check@v3 + - name: Cache Cargo dependencies + uses: Swatinem/rust-cache@v2 + doc: + # run docs generation on nightly rather than stable. This enables features like + # https://doc.rust-lang.org/beta/unstable-book/language-features/doc-cfg.html which allows an + # API be documented as only available in some specific platforms. + name: doc + runs-on: ubuntu-latest + steps: + - uses: actions/checkout@v4 + - name: Install Rust nightly + uses: dtolnay/rust-toolchain@nightly + - name: Run cargo doc + run: cargo doc --no-deps --all-features + env: + RUSTDOCFLAGS: --cfg docsrs + test: + runs-on: ${{ matrix.os }} + name: test ${{ matrix.os }} + strategy: + fail-fast: false + matrix: + os: [macos-latest, windows-latest] + steps: + # if your project needs OpenSSL, uncomment this to fix Windows builds. + # it's commented out by default as the install command takes 5-10m. + # - run: echo "VCPKG_ROOT=$env:VCPKG_INSTALLATION_ROOT" | Out-File -FilePath $env:GITHUB_ENV -Append + # if: runner.os == 'Windows' + # - run: vcpkg install openssl:x64-windows-static-md + # if: runner.os == 'Windows' + - uses: actions/checkout@v4 + - name: 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b/LICENSE new file mode 100644 index 0000000..9fe6610 --- /dev/null +++ b/LICENSE @@ -0,0 +1,21 @@ +The MIT License (MIT) + +Copyright (c) JasterV <49537445+JasterV@users.noreply.github.com> + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/README.md b/README.md new file mode 100644 index 0000000..c37143d --- /dev/null +++ b/README.md @@ -0,0 +1,14 @@ +# ratatui-helloworld + +This is a [Ratatui] app generated by the [Simple Template]. + +[Ratatui]: https://ratatui.rs +[Simple Template]: https://github.com/ratatui/templates/tree/main/simple + +## License + +Copyright (c) JasterV <49537445+JasterV@users.noreply.github.com> + +This project is licensed under the MIT license ([LICENSE] or ) + +[LICENSE]: ./LICENSE diff --git a/src/engine.rs b/src/engine.rs new file mode 100644 index 0000000..22bfe18 --- /dev/null +++ b/src/engine.rs @@ -0,0 +1,39 @@ +//! This module represents the obscure "side effects" layer of our TUI application. +//! +//! It is called engine because it implements the gears that deal with the outside world. +//! +//! Thanks to this layer, we can work on the "update" and "render" without having to worry about side effects. +//! +//! It knows how to read events from the outside world and how to talk to the terminal. +//! +use crate::{ + model::{Effect, Message, Model}, + update::update, + view::view, +}; +use color_eyre::Result; +use crossterm::event; +use ratatui::DefaultTerminal; + +pub fn run(model: Model, mut terminal: DefaultTerminal) -> Result<()> { + // 1. Render a widget from the current state + let widget = view(&model)?; + + terminal.draw(|frame| frame.render_widget(widget, frame.area()))?; + + // 2. Read terminal events + let message = Message::from(event::read()?); + + // 3. Update the model based on the received events + let (model, effect) = update(model, message)?; + + // 4. Run side effects if any + if let Effect::Stop = effect { + // If side effects were to become more complex, + // I'd separate the implementation in a separate module. + return Ok(()); + } + + // 5. Move to the next iteration + run(model, terminal) +} diff --git a/src/main.rs b/src/main.rs new file mode 100644 index 0000000..bc099f5 --- /dev/null +++ b/src/main.rs @@ -0,0 +1,17 @@ +use model::Model; + +mod engine; +mod model; +mod update; +mod view; + +fn main() -> color_eyre::Result<()> { + color_eyre::install()?; + + let terminal = ratatui::init(); + + engine::run(Model::default(), terminal)?; + + ratatui::restore(); + Ok(()) +} diff --git a/src/model.rs b/src/model.rs new file mode 100644 index 0000000..d14bfb0 --- /dev/null +++ b/src/model.rs @@ -0,0 +1,45 @@ +//! Elm-like model module. +//! +//! Defines the state of the application, the messages that can be received +//! from the outside world and the effects that can be produced. +use crossterm::event::{Event, KeyCode, KeyEvent, KeyEventKind, KeyModifiers}; + +#[derive(Debug, Default)] +pub struct Model {} + +pub enum Effect { + Stop, + Continue, +} + +pub enum Message { + ExitKeyPressed, + NoOp, +} + +impl From for Message { + fn from(value: Event) -> Self { + match value { + Event::Key(KeyEvent { + code: KeyCode::Esc | KeyCode::Char('q'), + kind: KeyEventKind::Press, + state: _, + modifiers: _, + }) => Self::ExitKeyPressed, + + Event::Key(KeyEvent { + code: KeyCode::Char('c') | KeyCode::Char('C'), + modifiers: KeyModifiers::CONTROL, + kind: KeyEventKind::Press, + state: _, + }) => Self::ExitKeyPressed, + + Event::FocusGained + | Event::FocusLost + | Event::Key(_) + | Event::Mouse(_) + | Event::Paste(_) + | Event::Resize(_, _) => Self::NoOp, + } + } +} diff --git a/src/update.rs b/src/update.rs new file mode 100644 index 0000000..8c3be19 --- /dev/null +++ b/src/update.rs @@ -0,0 +1,13 @@ +//! Elm-like update function. +//! +//! Given the current state (model) and an incoming message from the outside world, +//! return a new state and a side effect. +use crate::model::{Effect, Message, Model}; +use color_eyre::Result; + +pub fn update(model: Model, msg: Message) -> Result<(Model, Effect)> { + match msg { + Message::ExitKeyPressed => Ok((model, Effect::Stop)), + Message::NoOp => Ok((model, Effect::Continue)), + } +} diff --git a/src/view.rs b/src/view.rs new file mode 100644 index 0000000..1206fa1 --- /dev/null +++ b/src/view.rs @@ -0,0 +1,27 @@ +//! Elm-like View function. +//! +//! Given the current state (read-only), return a drawable widget. +use crate::model::Model; +use color_eyre::Result; +use ratatui::{ + style::Stylize, + text::Line, + widgets::{Block, Paragraph, Widget}, +}; + +pub fn view(_model: &Model) -> Result { + let title = Line::from("Ratatui Simple Template") + .bold() + .blue() + .centered(); + + let text = "Hello, Ratatui!\n\n\ + Created using https://github.com/ratatui/templates\n\ + Press `Esc`, `Ctrl-C` or `q` to stop running."; + + let widget = Paragraph::new(text) + .block(Block::bordered().title(title)) + .centered(); + + Ok(widget) +}