1use crate::{settings_store::SettingsStore, Settings};
  2use anyhow::Result;
  3use fs2::Fs;
  4use futures::{channel::mpsc, StreamExt};
  5use gpui2::{AppContext, Executor};
  6use std::{io::ErrorKind, path::PathBuf, str, sync::Arc, time::Duration};
  7use util::{paths, ResultExt};
  8
  9pub const EMPTY_THEME_NAME: &'static str = "empty-theme";
 10
 11#[cfg(any(test, feature = "test-support"))]
 12pub fn test_settings() -> String {
 13    let mut value = crate::settings_store::parse_json_with_comments::<serde_json::Value>(
 14        crate::default_settings().as_ref(),
 15    )
 16    .unwrap();
 17    util::merge_non_null_json_value_into(
 18        serde_json::json!({
 19            "buffer_font_family": "Courier",
 20            "buffer_font_features": {},
 21            "buffer_font_size": 14,
 22            "theme": EMPTY_THEME_NAME,
 23        }),
 24        &mut value,
 25    );
 26    value.as_object_mut().unwrap().remove("languages");
 27    serde_json::to_string(&value).unwrap()
 28}
 29
 30pub fn watch_config_file(
 31    executor: &Executor,
 32    fs: Arc<dyn Fs>,
 33    path: PathBuf,
 34) -> mpsc::UnboundedReceiver<String> {
 35    let (tx, rx) = mpsc::unbounded();
 36    executor
 37        .spawn(async move {
 38            let events = fs.watch(&path, Duration::from_millis(100)).await;
 39            futures::pin_mut!(events);
 40
 41            let contents = fs.load(&path).await.unwrap_or_default();
 42            if tx.unbounded_send(contents).is_err() {
 43                return;
 44            }
 45
 46            loop {
 47                if events.next().await.is_none() {
 48                    break;
 49                }
 50
 51                if let Ok(contents) = fs.load(&path).await {
 52                    if !tx.unbounded_send(contents).is_ok() {
 53                        break;
 54                    }
 55                }
 56            }
 57        })
 58        .detach();
 59    rx
 60}
 61
 62pub fn handle_settings_file_changes(
 63    mut user_settings_file_rx: mpsc::UnboundedReceiver<String>,
 64    cx: &mut AppContext,
 65) {
 66    let user_settings_content = cx.executor().block(user_settings_file_rx.next()).unwrap();
 67    cx.update_global(|store: &mut SettingsStore, cx| {
 68        store
 69            .set_user_settings(&user_settings_content, cx)
 70            .log_err();
 71    });
 72    cx.spawn(move |mut cx| async move {
 73        while let Some(user_settings_content) = user_settings_file_rx.next().await {
 74            let result = cx.update_global(|store: &mut SettingsStore, cx| {
 75                store
 76                    .set_user_settings(&user_settings_content, cx)
 77                    .log_err();
 78                cx.refresh();
 79            });
 80            if result.is_err() {
 81                break; // App dropped
 82            }
 83        }
 84    })
 85    .detach();
 86}
 87
 88async fn load_settings(fs: &Arc<dyn Fs>) -> Result<String> {
 89    match fs.load(&paths::SETTINGS).await {
 90        result @ Ok(_) => result,
 91        Err(err) => {
 92            if let Some(e) = err.downcast_ref::<std::io::Error>() {
 93                if e.kind() == ErrorKind::NotFound {
 94                    return Ok(crate::initial_user_settings_content().to_string());
 95                }
 96            }
 97            return Err(err);
 98        }
 99    }
100}
101
102pub fn update_settings_file<T: Settings>(
103    fs: Arc<dyn Fs>,
104    cx: &mut AppContext,
105    update: impl 'static + Send + FnOnce(&mut T::FileContent),
106) {
107    cx.spawn(|cx| async move {
108        let old_text = load_settings(&fs).await?;
109        let new_text = cx.read_global(|store: &SettingsStore, _cx| {
110            store.new_text_for_update::<T>(old_text, update)
111        })?;
112        fs.atomic_write(paths::SETTINGS.clone(), new_text).await?;
113        anyhow::Ok(())
114    })
115    .detach_and_log_err(cx);
116}