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//! In-window Command line interface. Used for operations that are just easier than with GUI.
//!
//! Sometimes it is nice to have a GUI, for instance when a selection has to be made, things have to
//! be moved etc., however for operations like saving/loading and exporting, no such thing has to be
//! done and the GUI is really just slowing you down (at least in my opinion). For these operations,
//! it is much better to simply have a command do that specific thing. It is also much easier to
//! implement a new command, so features can be tested more quickly. For some things, there should
//! still be a GUI option. With the example of saving/loading, it is much easier to find some hidden
//! folder in a GUI, so that is definitely a consideration for the future.
pub mod cmd;
pub use self::cmd::*;
use crate::colours::DEFAULT_COLOURS;
use crate::math::Vec2;
use crate::Editor;
use raylib::drawing::{RaylibDraw, RaylibDrawHandle};
use raylib::ffi::KeyboardKey;
use raylib::RaylibHandle;
/// The command line interface. Should be created only once per program instance.
pub struct CLI {
text: String,
active: bool,
}
impl CLI {
/// Create a CLI for this instance
pub fn new() -> Self {
Self {
text: String::new(),
active: false,
}
}
/// Activates the CLI, which will now capture keyboard input and execute commands accordingly.
pub fn activate(&mut self) {
if !self.active {
self.text = ";".to_owned();
self.active = true;
}
}
/// Handle input for the command line and perform any commands the user may want to run.
pub fn update(&mut self, rl: &mut RaylibHandle, editor: &mut Editor) {
/* Check if the CLI is currently active. If not and it should not be activated according to
* keyboard input, there is nothing to do.
*/
if !self.active {
if rl.is_key_pressed(KeyboardKey::KEY_SEMICOLON) {
// Don't write the keypress again.
rl.get_key_pressed();
self.activate();
} else {
return;
}
}
// The CLI is currently active. Handle input to it.
if let Some(key) = rl.get_key_pressed_number() {
self.text.push(key as u8 as char);
} else if rl.is_key_pressed(KeyboardKey::KEY_BACKSPACE) {
self.text.pop();
} else if rl.is_key_pressed(KeyboardKey::KEY_ESCAPE) {
self.text.clear();
}
// When the text is empty, there is also no command marker, so set as inactive and leave.
if self.text.is_empty() {
self.active = false;
return;
}
// Perform the entered command, when the enter-key is pressed.
if rl.is_key_pressed(KeyboardKey::KEY_ENTER) {
self.active = false;
match cmd::parse_command(&self.text[1..]) {
Ok(cmd) => match cmd.process(editor) {
Ok(res) => self.text = format!("SUCCESS: {}", res),
Err(err) => self.text = format!("ERROR: {}", err),
},
Err(err) => self.text = format!("SYNTAX ERROR: {}", err),
}
}
}
/// Draw the command line at the bottom of the window.
pub fn draw(&self, rld: &mut RaylibDrawHandle) {
let pos = Vec2::new(150., rld.get_screen_height() as f32 - 25.);
rld.draw_rectangle_v(
pos,
Vec2::new(rld.get_screen_width() as f32 - pos.x, 25.),
DEFAULT_COLOURS.cli_background,
);
rld.draw_text(
&self.text,
155,
rld.get_screen_height() - 22,
20,
DEFAULT_COLOURS.cli_foreground,
);
}
}
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