SimplePanoramaViewer/src/main.rs

#![windows_subsystem = "windows"]

use anyhow::{anyhow, Result};
use clap::{Arg, Command};
use image::{imageops::FilterType, io::Reader as ImageReader};
use log::info;
use native_dialog::{FileDialog, MessageDialog};
use rexiv2::Metadata;
use rust_embed::RustEmbed;
use simplelog::{ColorChoice, ConfigBuilder, LevelFilter, TermLogger, TerminalMode};
use std::{fs::File, io::BufWriter, path::PathBuf, thread::JoinHandle};
use tempfile::tempdir;
use warp::Filter;
use wry::{
    application::{
        event::{Event, StartCause, WindowEvent},
        event_loop::{ControlFlow, EventLoop},
        window::WindowBuilder,
    },
    webview::WebViewBuilder,
};

#[derive(RustEmbed)]
#[folder = "embed/"]
struct Embed;

fn main() -> Result<()> {
    // Init log
    TermLogger::init(
        LevelFilter::Info,
        ConfigBuilder::new()
            .set_time_offset_to_local()
            .unwrap()
            .build(),
        TerminalMode::Mixed,
        ColorChoice::Auto,
    )?;

    let tmp_dir = tempdir()?;

    let cmd = Command::new("Simple panorama viewer")
        .arg(
            Arg::new("filename")
                .allow_invalid_utf8(true)
                .help("Image path"),
        )
        .get_matches();

    let img_path = if let Some(img_path) = cmd.value_of_os("filename") {
        PathBuf::from(img_path)
    } else {
        let user_dirs = directories::UserDirs::new().unwrap();
        let dir = if let Some(img_dir) = user_dirs.picture_dir() {
            img_dir
        } else {
            user_dirs.home_dir()
        };
        FileDialog::new()
            .add_filter(
                "Images",
                &[
                    "jpg", "JPG", "jpeg", "pjpeg", "pjpg", "PJPG", "webp", "avif",
                ],
            )
            .set_location(dir)
            .show_open_single_file()?
            .ok_or_else(|| anyhow!("No file"))?
    };

    info!("Open `{}`", img_path.display());
    let (width, height) = image::image_dimensions(&img_path)?;
    const MAX_IMG_SIZE: u32 = 20_000_000;
    let img_data_path = if height * width > MAX_IMG_SIZE {
        // @todo Option pas de resize / taille en ligne de commande
        // @todo Option pas de resize / taille dans une config
        // @todo Icon
        let ratio = (height * width) as f64 / MAX_IMG_SIZE as f64;
        let new_height = (height as f64 / ratio.sqrt()) as u32;
        let new_width = (width as f64 / ratio.sqrt()) as u32;

        if MessageDialog::new()
            .set_title("Resize")
            .set_text(&format!("Resize the file to {} × {}", new_width, new_height))
            .show_confirm()?
        {
            // Resize image
            let img = ImageReader::open(&img_path)?.decode()?;
            info!("Resize image to {} × {}", new_width, new_height);
            let image_resized = img.resize(new_width, new_height, FilterType::Triangle);

            // Save file and add metadata
            let tmp_img_path = tmp_dir.path().join("img.jpg");
            image_resized.write_to(
                &mut BufWriter::new(File::create(&tmp_img_path)?),
                image::ImageOutputFormat::Jpeg(95),
            )?;
            let metadata = Metadata::new_from_path(&img_path)?;
            metadata.save_to_file(&tmp_img_path)?;
            tmp_img_path
        } else {
            img_path
        }
    } else {
        img_path
    };
    let img_data = std::fs::read(&img_data_path)?;
    tmp_dir.close()?;
    let img_base_64 = base64::encode(img_data);

    info!("Generate HTML");
    let html = std::str::from_utf8(Embed::get("index.html").unwrap().data.as_ref())?
        .replace("__BASE_64_IMG__", &img_base_64);
    run_server(html);

    info!("Create webview");
    let event_loop = EventLoop::new();
    let window = WindowBuilder::new()
        .with_title("Simple panorama viewer")
        .with_maximized(true)
        .build(&event_loop)?;
    let _webview = WebViewBuilder::new(window)?
        .with_url("http://127.0.0.1:62371")?
        .build()?;

    info!("Event loop");
    event_loop.run(move |event, _, control_flow| {
        *control_flow = ControlFlow::Wait;

        match event {
            Event::NewEvents(StartCause::Init) => info!("Panorama open"),
            Event::WindowEvent {
                event: WindowEvent::CloseRequested,
                ..
            } => {
                info!("Close");
                *control_flow = ControlFlow::Exit
            }
            _ => (),
        }
    });
}

fn run_server(html: String) -> JoinHandle<()> {
    std::thread::spawn(|| {
        let async_runtime = tokio::runtime::Builder::new_current_thread()
            .enable_all()
            .build()
            .unwrap();
        let hello = warp::any().map(move || warp::reply::html(html.clone()));
        async_runtime.block_on(warp::serve(hello).run(([127, 0, 0, 1], 62371)));
    })
}