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110 lines
6.1 KiB
Markdown
110 lines
6.1 KiB
Markdown
# Cursive
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[](https://travis-ci.org/gyscos/Cursive)
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[](https://crates.io/crates/cursive)
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[](./LICENSE)
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Cursive is a ncurses-based TUI (Text User Interface) library for rust. It is based on jeaye's [ncurses-rs](https://github.com/jeaye/ncurses-rs).
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# [Documentation](http://gyscos.github.io/Cursive/cursive/index.html)
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It is designed to be safe and easy to use:
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```
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[dependencies]
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cursive = "0.0.4"
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```
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Or to use the latest git version:
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```
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[dependencies]
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cursive = { git = "https://github.com/gyscos/Cursive" }
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```
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(You will also need ncurses installed - if it isn't already, check in your package manager.)
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```rust
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extern crate cursive;
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use cursive::Cursive;
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use cursive::view::{TextView, Dialog};
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fn main() {
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// Creates the cursive root - required for every application.
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let mut siv = Cursive::new();
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// Creates a dialog with a single "Quit" button
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siv.add_layer(Dialog::new(TextView::new("Hello Dialog!"))
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.title("Cursive")
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.button("Quit", |s| s.quit()));
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// Starts the event loop.
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siv.run();
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}
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```
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_(Colors may depend on your terminal configuration.)_
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## Goals
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* **Ease of use.** Simple apps should be simple. Complex apps should be manageable.
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* **Linux TTY Compatibility.** Colors may suffer, and UTF-8 may be too much, but most features *must* work properly on a Linux TTY.
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* **Flexibility.** This library should be able to handle simple UI scripts, complex real-time applications, or even games.
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* In particular, it tries to have enough features to recreate these kind of tools:
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* [menuconfig](http://en.wikipedia.org/wiki/Menuconfig#/media/File:Linux_x86_3.10.0-rc2_Kernel_Configuration.png)
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* [nmtui](https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Networking_Guide/sec-Configure_a_Network_Team_Using_the_Text_User_Interface_nmtui.html)
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## _Non_-goals
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* **Extreme performance.** This is a simple layout library, guys, not [compiz](https://www.google.com/search?q=compiz&tbm=isch) piped into [libcaca](https://www.google.com/search?q=libcaca&tbm=isch). Unless you are running it on your microwave's microcontroller, it's not going to be slow.
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* **Multi-threaded UI.** Callback methods are blocking - careful what you're doing in there! Feel free to use threads on your side, though.
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* **Complete ncurses equivalent.** You _can_ access the underlying ncurses window when creating your own custom views, so you can do what you want with that, but the main library will probably only use a subset of the ncurses features.
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## Compatibility
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First off, terminals are messy. A small set of features is standard, but beyond that, almost every terminal has its own implementation.
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### Output
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* **Colors**: the basic 8-colors palette should be broadly supported. User-defined colors is not supported in the raw linux TTY, but should work in most terminals, although it's still kinda experimental.
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* **UTF-8**: Currently Cursive really expects a UTF-8 locale. It may eventually get patched to support window borders on other locales, but it's not a priority.
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Also, Cursive currently expects every codepoint to be a one-column character, so some things may break with exotic characters...
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### Input
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* The `key_codes` example can be a useful tool to see how the library reacts to various key presses.
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* Keep in mind that if the terminal has shortcuts registered, they probably won't be transmitted to the app.
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* UTF-8 input should work fine in a unicode-enabled terminal emulator, but raw linux TTY may be more capricious.
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Here is the support table for input keys. Tested terminals are mostly Gnome terminal and Linux TTY, xterm, and a few others now and then.
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| | Key | Shift+Key | Ctrl+Key | Shift+Ctrl+Key |
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|--------------------------|:----:|:----------------------:|:--------------------------:|:---------------:|
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| Letters | All | All | All (except c,z,q,s,i,h,m) | None |
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| Numbers | All | All | None (can crash the app) | None |
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| Punctuation | All | All | None (can crash the app) | None |
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| Enter, Esc | All | None | None | None |
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| Left, Right arrow keys | All | VTE+Xterm | VTE+Xterm | VTE+Xterm |
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| Up, Down arrow keys | All | Xterm | VTE+Xterm | Xterm |
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| Ins | All | None (paste clipboard) | Xterm | None |
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| Del | All | VTE+Xterm | VTE+Xterm | VTE+Xterm |
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| Home, End | All | Xterm | Xterm | Xterm |
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| PageUp, PageDown | All | All | All | None |
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| Fn keys: F1-F4 | All | All except Konsole | Gnome+XTerm | Gnome+Xterm |
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| Fn keys: F5-F8 | All | All | All except TTY | All except TTY |
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| Fn keys: F9-F12 | All | All except TTY | All except TTY | All except TTY |
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| PrtScn, ScrollLock | None | None | None | None |
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| Window, Menu | None | None | None | None |
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## Contribute
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You want to help? Great! Here is a non-exhaustive list of things you could do:
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* Provide example use-case: a good idea of application for existing or new components.
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* Check compatibility: run the `key_codes` example on your favorite terminal, and report the results!
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* Test and reports issues: a bug won't get fixed if we don't know it's there.
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* Hack the code! If you feel confident with rust, pick an issue you like and hack away!
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