123 lines
3.5 KiB
Rust
123 lines
3.5 KiB
Rust
//! ## Layout
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//!
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//! `Layout` is the module which provides components, view, state and properties to create layouts
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/**
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* MIT License
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*
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* termscp - Copyright (c) 2021 Christian Visintin
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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// Modules
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pub mod components;
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pub mod props;
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pub mod utils;
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pub mod view;
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// locals
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use props::{PropValue, Props, PropsBuilder};
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// ext
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use crossterm::event::Event as InputEvent;
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use crossterm::event::KeyEvent;
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use std::io::Stdout;
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use tui::backend::CrosstermBackend;
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use tui::layout::Rect;
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use tui::Frame;
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type Backend = CrosstermBackend<Stdout>;
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pub(crate) type Canvas<'a> = Frame<'a, Backend>;
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// -- Msg
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/// ## Msg
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///
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/// Msg is an enum returned after an event is raised for a certain component
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/// Yep, I took inspiration from Elm.
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#[derive(std::fmt::Debug, PartialEq, Eq)]
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pub enum Msg {
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OnSubmit(Payload),
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OnChange(Payload),
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OnKey(KeyEvent),
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None,
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}
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/// ## Payload
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///
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/// Payload describes a component value
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#[derive(std::fmt::Debug, PartialEq, Eq)]
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pub enum Payload {
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Text(String),
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//Signed(isize),
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Unsigned(usize),
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None,
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}
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// -- Component
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/// ## Component
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///
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/// Component is a trait which defines the behaviours for a Layout component.
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/// All layout components must implement a method to render and one to update
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pub trait Component {
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/// ### render
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///
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/// Based on the current properties and states, renders the component in the provided area frame
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#[cfg(not(tarpaulin_include))]
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fn render(&self, frame: &mut Canvas, area: Rect);
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/// ### update
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///
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/// Update component properties
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/// Properties should first be retrieved through `get_props` which creates a builder from
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/// existing properties and then edited before calling update.
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/// Returns a Msg to the view
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fn update(&mut self, props: Props) -> Msg;
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/// ### get_props
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///
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/// Returns a props builder starting from component properties.
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/// This returns a prop builder in order to make easier to create
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/// new properties for the element.
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fn get_props(&self) -> PropsBuilder;
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/// ### on
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///
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/// Handle input event and update internal states.
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/// Returns a Msg to the view
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fn on(&mut self, ev: InputEvent) -> Msg;
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/// ### get_value
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///
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/// Get current value from component
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fn get_value(&self) -> Payload;
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// -- events
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/// ### blur
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///
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/// Blur component; basically remove focus
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fn blur(&mut self);
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/// ### active
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///
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/// Active component; basically give focus
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fn active(&mut self);
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}
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