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use std::io;
use std::path;
use std::process::{Command, Output};
use std::thread;
use tui::layout::Constraint;
use crate::context::AppContext;
use crate::event::AppEvent;
use crate::ui::{self, TuiBackend};
#[derive(Clone, Debug)]
pub enum PreviewState {
NoPreview,
SomePreview(FilePreview),
}
#[derive(Clone, Debug)]
pub struct FilePreview {
pub status: std::process::ExitStatus,
pub output: String,
pub index: usize,
}
impl std::convert::From<Output> for FilePreview {
fn from(output: Output) -> Self {
let s = String::from_utf8_lossy(&output.stdout).to_string();
let s2 = s.replace('\t', " ");
let status = output.status;
Self {
status,
output: s2,
index: 0,
}
}
}
#[allow(dead_code)]
pub struct Foreground {}
impl Foreground {
pub fn preview_path_with_script(
context: &AppContext,
backend: &mut TuiBackend,
p: path::PathBuf,
) -> io::Result<Output> {
let preview_options = context.config_ref().preview_options_ref();
let config = context.config_ref();
match preview_options.preview_script.as_ref() {
None => Err(io::Error::new(
io::ErrorKind::Other,
"No preview script specified",
)),
Some(script) => {
let area = backend.terminal.as_ref().unwrap().size().unwrap();
let display_options = config.display_options_ref();
let constraints: &[Constraint; 3] = &display_options.default_layout;
let layout_rect = ui::build_layout(area, constraints, display_options)[2];
let file_full_path = p.as_path();
let preview_width = layout_rect.width;
let preview_height = layout_rect.height;
let image_cache = 0;
let preview_image = if preview_options.preview_images { 1 } else { 0 };
// spawn preview process
Command::new(script)
.arg(file_full_path)
.arg(preview_width.to_string())
.arg(preview_height.to_string())
.arg(image_cache.to_string())
.arg(preview_image.to_string())
.output()
}
}
}
pub fn preview_with_script(
context: &AppContext,
backend: &mut TuiBackend,
) -> io::Result<Output> {
let curr_tab = context.tab_context_ref().curr_tab_ref();
let child_list = curr_tab.child_list_ref();
match child_list.and_then(|list| list.curr_entry_ref()) {
None => Err(io::Error::new(io::ErrorKind::Other, "No file to preview")),
Some(entry) => {
Self::preview_path_with_script(context, backend, entry.file_path().to_path_buf())
}
}
}
}
pub struct Background {}
impl Background {
pub fn preview_path_with_script(
context: &AppContext,
backend: &mut TuiBackend,
path: path::PathBuf,
) {
let preview_options = context.config_ref().preview_options_ref();
let config = context.config_ref();
if let Some(script) = preview_options.preview_script.as_ref() {
let area = backend.terminal.as_ref().unwrap().size().unwrap();
let display_options = config.display_options_ref();
let constraints: &[Constraint; 3] = &display_options.default_layout;
let layout_rect = ui::build_layout(area, constraints, display_options)[2];
let preview_width = layout_rect.width;
let preview_height = layout_rect.height;
let image_cache = 0;
let preview_image = if preview_options.preview_images { 1 } else { 0 };
let script = script.clone();
let event_tx = context.clone_event_tx();
let _ = thread::spawn(move || {
let file_full_path = path.as_path();
let res = Command::new(script)
.arg(file_full_path)
.arg(preview_width.to_string())
.arg(preview_height.to_string())
.arg(image_cache.to_string())
.arg(preview_image.to_string())
.output();
match res {
Ok(output) => {
let preview = FilePreview::from(output);
let _ = event_tx.send(AppEvent::PreviewFile(path, Ok(preview)));
}
Err(e) => {
let _ = event_tx.send(AppEvent::PreviewFile(path, Err(e)));
}
}
});
}
}
}
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