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Watch files for external changes #840

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Watch files for external changes #840

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37 changes: 32 additions & 5 deletions src/Document.js
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Original file line number Diff line number Diff line change
Expand Up @@ -4,19 +4,44 @@ import GLib from "gi://GLib";

export default function Document({ session, code_view, lang }) {
const { buffer } = code_view;
let handler_id = null;
let modified_changed_handler_id = null;
let changed_signal_handler_id = null;

const file = session.file.get_child(lang.default_file);

const file_monitor = file.monitor(Gio.FileMonitorFlags.NONE, null);

function watchFile() {
unwatchFile();
changed_signal_handler_id = file_monitor.connect(
"changed",
(_self, _file, _other_file, event_type) => {
const event_name = Object.entries(Gio.FileMonitorEvent).find(
([_key, value]) => value === event_type,
)?.[0];
console.log("wow", event_name);
},
);
}

function unwatchFile() {
if (changed_signal_handler_id === null) return;
file_monitor.disconnect(changed_signal_handler_id);
changed_signal_handler_id = null;
}

const source_file = new Source.File({
location: file,
});

start();

function save() {
unwatchFile();
saveSourceBuffer({ source_file, buffer })
.catch(console.error)
.finally(() => {
watchFile();
try {
session.settings.set_boolean("edited", true);
} catch (err) {
Expand All @@ -27,17 +52,19 @@ export default function Document({ session, code_view, lang }) {

function start() {
stop();
handler_id = buffer.connect("modified-changed", () => {
modified_changed_handler_id = buffer.connect("modified-changed", () => {
if (!buffer.get_modified()) return;
save();
});
watchFile();
}

function stop() {
if (handler_id !== null) {
buffer.disconnect(handler_id);
handler_id = null;
if (modified_changed_handler_id !== null) {
buffer.disconnect(modified_changed_handler_id);
modified_changed_handler_id = null;
}
unwatchFile();
}

function load() {
Expand Down