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#[cfg(test)]
mod tests;
#[cfg(test)]
pub mod testutil;
use std::{process::Command, thread};
use anyhow::{anyhow, Result};
use display::Tui;
use crate::{
input::{Event, EventHandler, MetaEvent},
module::{ExitStatus, Modules, ProcessResult, State},
todo_file::TodoFile,
view::{spawn_view_thread, RenderContext, View, ViewSender},
};
pub struct Process {
event_handler: EventHandler,
exit_status: Option<ExitStatus>,
rebase_todo: TodoFile,
render_context: RenderContext,
state: State,
threads: Vec<thread::JoinHandle<()>>,
view_sender: ViewSender,
}
impl Process {
pub(crate) fn new<C: Tui + Send + 'static>(
rebase_todo: TodoFile,
event_handler: EventHandler,
view: View<C>,
) -> Self {
let view_size = view.get_view_size();
let mut threads = vec![];
let (view_sender, view_thread) = spawn_view_thread(view);
threads.push(view_thread);
Self {
event_handler,
exit_status: None,
rebase_todo,
render_context: RenderContext::new(view_size.width() as u16, view_size.height() as u16),
state: State::List,
threads,
view_sender,
}
}
pub(crate) fn run(&mut self, mut modules: Modules) -> Result<ExitStatus> {
if self.view_sender.start().is_err() {
self.exit_status = Some(ExitStatus::StateError);
return Ok(ExitStatus::StateError);
}
self.handle_process_result(
&mut modules,
&ProcessResult::new().event(Event::Resize(
self.render_context.width() as u16,
self.render_context.height() as u16,
)),
);
self.activate(&mut modules, State::List);
while self.exit_status.is_none() {
let view_data = modules.build_view_data(self.state, &self.render_context, &self.rebase_todo);
if self.view_sender.render(view_data).is_err() {
self.exit_status = Some(ExitStatus::StateError);
continue;
}
loop {
if self.view_sender.is_poisoned() {
self.exit_status = Some(ExitStatus::StateError);
break;
}
let result = modules.handle_input(
self.state,
&self.event_handler,
&self.view_sender,
&mut self.rebase_todo,
);
if let Some(event) = result.event {
if event != Event::None {
self.handle_process_result(&mut modules, &result);
break;
}
}
}
}
if self.view_sender.stop().is_err() {
return Ok(ExitStatus::StateError);
}
if let Some(status) = self.exit_status {
eprintln!("Status: {:?}", status);
if status != ExitStatus::Kill {
self.rebase_todo.write_file()?;
}
}
if self.view_sender.end().is_err() {
return Ok(ExitStatus::StateError);
}
while let Some(handle) = self.threads.pop() {
if handle.join().is_err() {
return Ok(ExitStatus::StateError);
}
}
Ok(self.exit_status.unwrap_or(ExitStatus::Good))
}
fn handle_process_result(&mut self, modules: &mut Modules, result: &ProcessResult) {
let previous_state = self.state;
// render context and view_sender need a size update early
if let Some(Event::Resize(width, height)) = result.event {
self.view_sender.resize(width, height);
self.render_context.update(width, height);
}
if let Some(exit_status) = result.exit_status {
self.exit_status = Some(exit_status);
}
if let Some(ref error) = result.error {
self.state = State::Error;
modules.error(self.state, error);
self.activate(modules, result.state.unwrap_or(previous_state));
}
else if let Some(new_state) = result.state {
if new_state != self.state {
modules.deactivate(self.state);
self.state = new_state;
self.activate(modules, previous_state);
}
}
match result.event {
Some(Event::Meta(MetaEvent::Exit)) => {
self.exit_status = Some(ExitStatus::Abort);
},
Some(Event::Meta(MetaEvent::Kill)) => {
self.exit_status = Some(ExitStatus::Kill);
},
Some(Event::Resize(..)) => {
if self.state != State::WindowSizeError && self.render_context.is_window_too_small() {
self.state = State::WindowSizeError;
self.activate(modules, previous_state);
}
},
_ => {},
};
if let Some(ref external_command) = result.external_command {
match self.run_command(external_command) {
Ok(meta_event) => self.event_handler.push_event(Event::from(meta_event)),
Err(err) => {
self.handle_process_result(
modules,
&ProcessResult::new().state(State::List).error(err.context(format!(
"Unable to run {} {}",
external_command.0,
external_command.1.join(" ")
))),
);
},
}
}
}
fn run_command(&mut self, external_command: &(String, Vec<String>)) -> Result<MetaEvent> {
self.view_sender.stop()?;
let mut cmd = Command::new(external_command.0.clone());
cmd.args(external_command.1.clone());
let result = cmd
.status()
.map(|status| {
if status.success() {
MetaEvent::ExternalCommandSuccess
}
else {
MetaEvent::ExternalCommandError
}
})
.map_err(|err| anyhow!(err));
self.view_sender.start()?;
result
}
fn activate(&mut self, modules: &mut Modules, previous_state: State) {
let result = modules.activate(self.state, &self.rebase_todo, previous_state);
// always trigger a resize on activate, for modules that track size
self.event_handler.push_event(Event::Resize(
self.render_context.width() as u16,
self.render_context.height() as u16,
));
self.handle_process_result(modules, &result);
}
}
|
