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Merge pull request #137 from afonsofrancof/refactor_float

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Big refactor. Made floats generic, to show anything
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Chris Titus 2024-08-08 18:14:47 -05:00 committed by GitHub
commit b82d0cd81b
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5 changed files with 324 additions and 289 deletions
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114
src/float.rs
View File

@ -1,59 +1,91 @@
use ratatui::layout::{Constraint, Direction, Layout, Rect};
use crossterm::event::{KeyCode, KeyEvent};
use ratatui::{
layout::{Constraint, Direction, Layout, Rect},
Frame,
};
/// This function just makes a given area smaller by 20 % in each direction, creating a kind of
/// "floating window". And you don't actually need all the constraints, and layouts to do that, its
/// very easy to calculate it directly, but I chose to use the ratatui API
pub fn floating_window(size: Rect) -> Rect {
// If the terminal window is small enough, just take up all the space for the command
if size.width < 85 || size.height < 25 {
return size;
pub trait FloatContent {
fn draw(&mut self, frame: &mut Frame, area: Rect);
fn handle_key_event(&mut self, key: &KeyEvent) -> bool;
fn is_finished(&self) -> bool;
}
pub struct Float<T: FloatContent> {
content: Option<T>,
width_percent: u16,
height_percent: u16,
}
impl<T: FloatContent> Float<T> {
pub fn new(width_percent: u16, height_percent: u16) -> Self {
Self {
content: None,
width_percent,
height_percent,
}
}
fn floating_window(&self, size: Rect) -> Rect {
let hor_float = Layout::default()
.constraints([
Constraint::Percentage(20),
Constraint::Percentage(60),
Constraint::Percentage(20),
Constraint::Percentage((100 - self.width_percent) / 2),
Constraint::Percentage(self.width_percent),
Constraint::Percentage((100 - self.width_percent) / 2),
])
.direction(Direction::Horizontal)
.split(size)[1];
Layout::default()
.constraints([
Constraint::Percentage(20),
Constraint::Percentage(60),
Constraint::Percentage(20),
Constraint::Percentage((100 - self.height_percent) / 2),
Constraint::Percentage(self.height_percent),
Constraint::Percentage((100 - self.height_percent) / 2),
])
.direction(Direction::Vertical)
.split(hor_float)[1]
}
/// Here is how would a purely math based function look like:
/// But it might break on smaller numbers
fn _unused_manual_floating_window(size: Rect) -> Rect {
// If the terminal window is small enough, just take up all the space for the command
if size.width < 85 || size.height < 25 {
return size;
}
let new_width = size.width * 60 / 100;
let new_height = size.height * 60 / 100;
let new_x = size.x + size.width * 20 / 100;
let new_y = size.y + size.height * 20 / 100;
Rect {
width: new_width,
height: new_height,
x: new_x,
y: new_y,
pub fn draw(&mut self, frame: &mut Frame, parent_area: Rect) {
let popup_area = self.floating_window(parent_area);
if let Some(content) = &mut self.content {
let content_area = Rect {
x: popup_area.x,
y: popup_area.y,
width: popup_area.width,
height: popup_area.height,
};
content.draw(frame, content_area);
}
}
#[test]
fn test_floating() {
let rect = Rect {
x: 10,
y: 2,
width: 100,
height: 200,
};
let res1 = floating_window(rect);
let res2 = floating_window(rect);
assert_eq!(res1, res2);
// Returns true if the key was processed by this Float.
pub fn handle_key_event(&mut self, key: &KeyEvent) -> bool {
if let Some(content) = &mut self.content {
match key.code {
KeyCode::Enter | KeyCode::Char('p') | KeyCode::Esc | KeyCode::Char('q') => {
if content.is_finished() {
self.content = None;
} else {
content.handle_key_event(key);
}
}
_ => {
content.handle_key_event(key);
}
}
true
} else {
false
}
}
pub fn get_content(&self) -> &Option<T> {
&self.content
}
pub fn set_content(&mut self, content: Option<T>) {
self.content = content;
}
}

82
src/floating_text.rs Normal file
View File

@ -0,0 +1,82 @@
use crate::float::FloatContent;
use crossterm::event::{KeyCode, KeyEvent};
use ratatui::{
layout::Rect,
style::{Style, Stylize},
text::Line,
widgets::{Block, Borders, List},
Frame,
};
pub struct FloatingText {
text: Vec<String>,
scroll: usize,
}
impl FloatingText {
pub fn new(text: Vec<String>) -> Self {
Self { text, scroll: 0 }
}
fn scroll_down(&mut self) {
if self.scroll + 1 < self.text.len() {
self.scroll += 1;
}
}
fn scroll_up(&mut self) {
if self.scroll > 0 {
self.scroll -= 1;
}
}
}
impl FloatContent for FloatingText {
fn draw(&mut self, frame: &mut Frame, area: Rect) {
// Define the Block with a border and background color
let block = Block::default()
.borders(Borders::ALL)
.style(Style::default());
// Draw the Block first
frame.render_widget(block.clone(), area);
// Calculate the inner area to ensure text is not drawn over the border
let inner_area = block.inner(area);
// Create the list of lines to be displayed
let lines: Vec<Line> = self
.text
.iter()
.skip(self.scroll)
.take(inner_area.height as usize)
.map(|line| Line::from(line.as_str()))
.collect();
// Create list widget
let list = List::new(lines)
.block(Block::default())
.highlight_style(Style::default().reversed());
// Render the list inside the bordered area
frame.render_widget(list, inner_area);
}
fn handle_key_event(&mut self, key: &KeyEvent) -> bool {
match key.code {
KeyCode::Down | KeyCode::Char('j') => {
self.scroll_down();
true
}
KeyCode::Up | KeyCode::Char('k') => {
self.scroll_up();
true
}
_ => false,
}
}
fn is_finished(&self) -> bool {
true
}
}

163
src/list.rs
View File

@ -1,4 +1,4 @@
use crate::{float::floating_window, running_command::Command, state::AppState};
use crate::{float::Float, floating_text::FloatingText, running_command::Command, state::AppState};
use crossterm::event::{KeyCode, KeyEvent, KeyEventKind};
use ego_tree::{tree, NodeId};
use ratatui::{
@ -26,28 +26,12 @@ pub struct CustomList {
/// This is the state asociated with the list widget, used to display the selection in the
/// widget
list_state: ListState,
/// This stores the preview windows state. If it is None, it will not be displayed.
/// If it is Some, we show it with the content of the selected item
preview_window_state: Option<PreviewWindowState>,
// This stores the current search query
filter_query: String,
// This stores the filtered tree
filtered_items: Vec<ListNode>,
}
/// This struct stores the preview window state
struct PreviewWindowState {
/// The text inside the window
text: Vec<String>,
/// The current line scroll
scroll: usize,
}
impl PreviewWindowState {
/// Create a new PreviewWindowState
pub fn new(text: Vec<String>) -> Self {
Self { text, scroll: 0 }
}
// This is the preview window for the commands
preview_float: Float<FloatingText>,
}
impl CustomList {
@ -196,10 +180,9 @@ impl CustomList {
inner_tree: tree,
visit_stack: vec![root_id],
list_state: ListState::default().with_selected(Some(0)),
// By default the PreviewWindowState is set to None, so it is not being shown
preview_window_state: None,
filter_query: String::new(),
filtered_items: vec![],
preview_float: Float::new(80, 80),
}
}
@ -263,32 +246,8 @@ impl CustomList {
// Render it
frame.render_stateful_widget(list, area, &mut self.list_state);
// Draw the preview window if it's active
if let Some(pw_state) = &self.preview_window_state {
// Set the window to be floating
let floating_area = floating_window(area);
// Draw the preview windows lines
let lines: Vec<Line> = pw_state
.text
.iter()
.skip(pw_state.scroll)
.take(floating_area.height as usize)
.map(|line| Line::from(line.as_str()))
.collect();
// Create list widget
let list = List::new(lines)
.block(
Block::default()
.borders(Borders::ALL)
.title("Action preview"),
)
.highlight_style(Style::default().reversed());
// Finally render the preview window
frame.render_widget(list, floating_area);
}
//Render the preview window
self.preview_float.draw(frame, area);
}
pub fn filter(&mut self, query: String) {
@ -327,38 +286,28 @@ impl CustomList {
if event.kind == KeyEventKind::Release {
return None;
}
if self.preview_float.handle_key_event(&event) {
return None; // If the key event was handled by the preview, don't propagate it further
}
match event.code {
// Damm you Up arrow, use vim lol
KeyCode::Char('j') | KeyCode::Down => {
// If the preview window is active, scroll down and consume the scroll action,
// so the scroll does not happen in the main window as well
if self.preview_window_state.is_some() {
self.scroll_preview_window_down();
} else {
self.list_state.select_next();
}
None
}
KeyCode::Char('k') | KeyCode::Up => {
// If the preview window is active, scroll up and consume the scroll action,
// so the scroll does not happen in the main window as well
if self.preview_window_state.is_some() {
self.scroll_preview_window_up();
} else {
self.list_state.select_previous();
}
None
}
// The 'p' key toggles the preview on and off
KeyCode::Char('p') => {
self.toggle_preview_window(state);
None
}
KeyCode::Enter | KeyCode::Right | KeyCode::Char('l') => {
if self.preview_window_state.is_none() {
if self.preview_float.get_content().is_none() {
self.handle_enter()
} else {
None
@ -368,65 +317,9 @@ impl CustomList {
_ => None,
}
}
fn toggle_preview_window(&mut self, state: &AppState) {
// If the preview window is active, disable it
if self.preview_window_state.is_some() {
self.preview_window_state = None;
} else {
// If the preview windows is not active, show it
// Get the selected command
if let Some(selected_command) = self.get_selected_command() {
let lines = match selected_command {
Command::Raw(cmd) => {
// Reconstruct the line breaks and file formatting after the
// 'include_str!()' call in the node
cmd.lines().map(|line| line.to_string()).collect()
}
Command::LocalFile(file_path) => {
let mut full_path = state.temp_path.clone();
full_path.push(file_path);
let file_contents = std::fs::read_to_string(&full_path)
.map_err(|_| format!("File not found: {:?}", &full_path))
.unwrap();
file_contents.lines().map(|line| line.to_string()).collect()
}
// If command is a folder, we don't display a preview
Command::None => return,
};
// Show the preview window with the text lines
self.preview_window_state = Some(PreviewWindowState::new(lines));
}
}
}
/// Scroll the preview window down
fn scroll_preview_window_down(&mut self) {
if let Some(pw_state) = &mut self.preview_window_state {
if pw_state.scroll + 1 < pw_state.text.len() {
pw_state.scroll += 1;
}
}
}
/// Scroll the preview window up
fn scroll_preview_window_up(&mut self) {
if let Some(pw_state) = &mut self.preview_window_state {
if pw_state.scroll > 0 {
pw_state.scroll = pw_state.scroll.saturating_sub(1);
}
}
}
/// This method returns the currently selected command, or None if no command is selected.
/// It was extracted from the 'handle_enter()'
///
/// This could probably be integrated into the 'handle_enter()' method to avoid code
/// duplication, but I don't want to make too major changes to the codebase.
fn get_selected_command(&self) -> Option<Command> {
let selected_index = self.list_state.selected().unwrap_or(0);
println!("Selected Index: {}", selected_index);
if self.filter_query.is_empty() {
// No filter query, use the regular tree navigation
@ -452,7 +345,6 @@ impl CustomList {
} else {
// Filter query is active, use the filtered items
if let Some(filtered_node) = self.filtered_items.get(selected_index) {
println!("Filtered Node Name: {}", filtered_node.name);
return Some(filtered_node.command.clone());
}
}
@ -512,6 +404,37 @@ impl CustomList {
None
}
fn toggle_preview_window(&mut self, state: &AppState) {
if self.preview_float.get_content().is_some() {
// If the preview window is active, disable it
self.preview_float.set_content(None);
} else {
// If the preview window is not active, show it
// Get the selected command
if let Some(selected_command) = self.get_selected_command() {
let lines = match selected_command {
Command::Raw(cmd) => cmd.lines().map(|line| line.to_string()).collect(),
Command::LocalFile(file_path) => {
if file_path.is_empty() {
return;
}
let mut full_path = state.temp_path.clone();
full_path.push(file_path);
let file_contents = std::fs::read_to_string(&full_path)
.map_err(|_| format!("File not found: {:?}", &full_path))
.unwrap();
file_contents.lines().map(|line| line.to_string()).collect()
}
Command::None => return,
};
self.preview_float
.set_content(Some(FloatingText::new(lines)));
}
}
}
/// Checks weather the current tree node is the root node (can we go up the tree or no)
/// Returns `true` if we can't go up the tree (we are at the tree root)
/// else returns `false`

27
src/main.rs
View File

@ -1,4 +1,5 @@
mod float;
mod floating_text;
mod list;
mod running_command;
pub mod state;
@ -17,6 +18,7 @@ use crossterm::{
terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
ExecutableCommand,
};
use float::Float;
use include_dir::include_dir;
use list::CustomList;
use ratatui::{
@ -77,9 +79,12 @@ fn main() -> std::io::Result<()> {
}
fn run<B: Backend>(terminal: &mut Terminal<B>, state: &AppState) -> io::Result<()> {
let mut command_opt: Option<RunningCommand> = None;
let mut custom_list = CustomList::new();
//Create the search field
let mut search_input = String::new();
//Create the command list
let mut custom_list = CustomList::new();
//Create the float to hold command output
let mut command_float = Float::new(60, 60);
let mut in_search_mode = false;
loop {
@ -118,10 +123,8 @@ fn run<B: Backend>(terminal: &mut Terminal<B>, state: &AppState) -> io::Result<(
frame.render_widget(search_bar, chunks[0]);
//Render the command list (Second chunk of the screen)
custom_list.draw(frame, chunks[1], state);
if let Some(ref mut command) = &mut command_opt {
command.draw(frame, state);
}
//Render the command float in the custom_list chunk
command_float.draw(frame, chunks[1]);
})
.unwrap();
@ -137,11 +140,11 @@ fn run<B: Backend>(terminal: &mut Terminal<B>, state: &AppState) -> io::Result<(
if key.kind != KeyEventKind::Press && key.kind != KeyEventKind::Repeat {
continue;
}
if let Some(ref mut command) = command_opt {
if command.handle_key_event(&key) {
command_opt = None;
}
} else {
//Send the key to the float
//If we receive true, then the float processed the input
//If that's the case, don't propagate input to other widgets
if !command_float.handle_key_event(&key) {
//Insert user input into the search bar
if in_search_mode {
match key.code {
@ -165,7 +168,7 @@ fn run<B: Backend>(terminal: &mut Terminal<B>, state: &AppState) -> io::Result<(
_ => {}
}
} else if let Some(cmd) = custom_list.handle_key(key, state) {
command_opt = Some(RunningCommand::new(cmd, state));
command_float.set_content(Some(RunningCommand::new(cmd, state)));
} else {
// Handle keys while not in search mode
match key.code {

199
src/running_command.rs
View File

@ -1,28 +1,26 @@
use std::{
io::Write,
sync::{Arc, Mutex},
thread::JoinHandle,
};
use crate::{float::FloatContent, state::AppState};
use crossterm::event::{KeyCode, KeyEvent, KeyModifiers};
use oneshot::{channel, Receiver};
use portable_pty::{
ChildKiller, CommandBuilder, ExitStatus, MasterPty, NativePtySystem, PtySize, PtySystem,
};
use ratatui::{
layout::Size,
style::{Style, Stylize},
layout::{Rect, Size},
style::{Color, Style, Stylize},
text::{Line, Span},
widgets::{Block, Borders},
Frame,
};
use std::{
io::Write,
sync::{Arc, Mutex},
thread::JoinHandle,
};
use tui_term::{
vt100::{self, Screen},
widget::PseudoTerminal,
};
use crate::{float::floating_window, state::AppState};
#[derive(Clone)]
pub enum Command {
Raw(&'static str),
@ -30,36 +28,107 @@ pub enum Command {
None, // Directory
}
/// This is a struct for storing everything connected to a running command
// Create a new instance on every new command you want to run
pub struct RunningCommand {
/// A buffer to save all the command output (accumulates, untill the command exits)
/// A buffer to save all the command output (accumulates, until the command exits)
buffer: Arc<Mutex<Vec<u8>>>,
/// A handle of the tread where the command is being executed
/// A handle for the thread running the command
command_thread: Option<JoinHandle<ExitStatus>>,
/// A handle to kill the running process, it's an option because it can only be used once
/// A handle to kill the running process; it's an option because it can only be used once
child_killer: Option<Receiver<Box<dyn ChildKiller + Send + Sync>>>,
/// A join handle for the thread that is reading all the command output and sending it to the
/// main thread
/// A join handle for the thread that reads command output and sends it to the main thread
_reader_thread: JoinHandle<()>,
/// Virtual terminal (pty) handle, used for resizing the pty
pty_master: Box<dyn MasterPty + Send>,
/// Used for sending keys to the emulated terminal
writer: Box<dyn Write + Send>,
/// Only set after the process has ended
status: Option<ExitStatus>,
}
impl FloatContent for RunningCommand {
fn draw(&mut self, frame: &mut Frame, area: Rect) {
// Calculate the inner size of the terminal area, considering borders
let inner_size = Size {
width: area.width - 2, // Adjust for border width
height: area.height - 2,
};
// Define the block for the terminal display
let block = if !self.is_finished() {
// Display a block indicating the command is running
Block::default()
.borders(Borders::ALL)
.title_top(Line::from("Running the command....").centered())
.title_style(Style::default().reversed())
.title_bottom(Line::from("Press Ctrl-C to KILL the command"))
} else {
// Display a block with the command's exit status
let mut title_line = if self.get_exit_status().success() {
Line::from(
Span::default()
.content("SUCCESS!")
.style(Style::default().fg(Color::Green).reversed()),
)
} else {
Line::from(
Span::default()
.content("FAILED!")
.style(Style::default().fg(Color::Red).reversed()),
)
};
title_line.push_span(
Span::default()
.content(" press <ENTER> to close this window ")
.style(Style::default()),
);
Block::default()
.borders(Borders::ALL)
.title_top(title_line.centered())
};
// Process the buffer and create the pseudo-terminal widget
let screen = self.screen(inner_size);
let pseudo_term = PseudoTerminal::new(&screen).block(block);
// Render the widget on the frame
frame.render_widget(pseudo_term, area);
}
/// Handle key events of the running command "window". Returns true when the "window" should be
/// closed
fn handle_key_event(&mut self, key: &KeyEvent) -> bool {
match key.code {
// Handle Ctrl-C to kill the command
KeyCode::Char('c') if key.modifiers.contains(KeyModifiers::CONTROL) => {
self.kill_child();
}
// Close the window when Enter is pressed and the command is finished
KeyCode::Enter if self.is_finished() => {
return true;
}
// Pass other key events to the terminal
_ => self.handle_passthrough_key_event(key),
}
false
}
fn is_finished(&self) -> bool {
// Check if the command thread has finished
if let Some(command_thread) = &self.command_thread {
command_thread.is_finished()
} else {
true
}
}
}
impl RunningCommand {
pub fn new(command: Command, state: &AppState) -> Self {
let pty_system = NativePtySystem::default();
// Build the command based on the provided Command enum variant
let mut cmd = CommandBuilder::new("sh");
match command {
Command::Raw(prompt) => {
@ -74,10 +143,11 @@ impl RunningCommand {
cmd.cwd(&state.temp_path);
// Open a pseudo-terminal with initial size
let pair = pty_system
.openpty(PtySize {
rows: 24, // Set the initial size of the emulated terminal
cols: 80, // We will update this later, if resized
rows: 24, // Initial number of rows (will be updated dynamically)
cols: 80, // Initial number of columns (will be updated dynamically)
pixel_width: 0,
pixel_height: 0,
})
@ -129,6 +199,7 @@ impl RunningCommand {
status: None,
}
}
fn screen(&mut self, size: Size) -> Screen {
// Resize the emulated pty
self.pty_master
@ -149,13 +220,7 @@ impl RunningCommand {
parser.process(buffer);
parser.screen().clone()
}
pub fn is_finished(&mut self) -> bool {
if let Some(command_thread) = &self.command_thread {
command_thread.is_finished()
} else {
true
}
}
/// This function will block if the command is not finished
fn get_exit_status(&mut self) -> ExitStatus {
if self.command_thread.is_some() {
@ -168,57 +233,6 @@ impl RunningCommand {
}
}
pub fn draw(&mut self, frame: &mut Frame, state: &AppState) {
// Funny name
let floater = floating_window(frame.size());
let inner_size = Size {
width: floater.width - 2, // Because we add a `Block` with a border
height: floater.height - 2,
};
// When the command is running
let term_border = if !self.is_finished() {
Block::default()
.borders(Borders::ALL)
.title_top(Line::from("Running the command....").centered())
.title_style(Style::default().reversed())
.title_bottom(Line::from("Press Ctrl-C to KILL the command"))
} else {
// This portion is just for pretty colors.
// You can use multiple `Span`s with different styles each, to construct a line,
// which can be used as a list item, or in this case a `Block` title
let mut title_line = if self.get_exit_status().success() {
Line::from(
Span::default()
.content("SUCCESS!")
.style(Style::default().fg(state.theme.success_color).reversed()),
)
} else {
Line::from(
Span::default()
.content("FAILED!")
.style(Style::default().fg(state.theme.fail_color).reversed()),
)
};
title_line.push_span(
Span::default()
.content(" press <ENTER> to close this window ")
.style(Style::default()),
);
Block::default()
.borders(Borders::ALL)
.title_top(title_line.centered())
};
let screen = self.screen(inner_size); // when the terminal is changing a lot, there
// will be 1 frame of lag on resizing
let pseudo_term = PseudoTerminal::new(&screen).block(term_border);
frame.render_widget(pseudo_term, floater);
}
/// Send SIGHUB signal, *not* SIGKILL or SIGTERM, to the child process
pub fn kill_child(&mut self) {
if !self.is_finished() {
@ -227,22 +241,6 @@ impl RunningCommand {
}
}
/// Handle key events of the running command "window". Returns true when the "window" should be
/// closed
pub fn handle_key_event(&mut self, key: &KeyEvent) -> bool {
match key.code {
KeyCode::Char('c') if key.modifiers.contains(KeyModifiers::CONTROL) => {
self.kill_child()
}
KeyCode::Enter if self.is_finished() => {
return true;
}
_ => self.handle_passthrough_key_event(key),
};
false
}
/// Convert the KeyEvent to pty key codes, and send them to the virtual terminal
fn handle_passthrough_key_event(&mut self, key: &KeyEvent) {
let input_bytes = match key.code {
@ -260,9 +258,6 @@ impl RunningCommand {
'6' | '^' => send = vec![30],
'7' | '-' | '_' => send = vec![31],
char if ('A'..='_').contains(&char) => {
// Since A == 65,
// we can safely subtract 64 to get
// the corresponding control character
let ascii_val = char as u8;
let ascii_to_send = ascii_val - 64;
send = vec![ascii_to_send];