Files
z-bar-qt/Plugins/ZShell/Config/Config.cpp
T

138 lines
3.6 KiB
C++

#include "Config.hpp"
#include <QFile>
#include <QSaveFile>
#include <QJsonDocument>
#include <QStandardPaths>
#include <QDir>
#include <QDebug>
#include <QFutureWatcher>
Config::Config(QObject* parent) : ConfigSection(parent) {
m_appearance = new Appearance(this);
m_background = new Background(this);
m_bar = new Bar(this);
m_clipboard = new Clipboard(this);
m_colors = new Colors(this);
m_dashboard = new Dashboard(this);
m_dock = new Dock(this);
m_general = new General(this);
m_launcher = new Launcher(this);
m_lock = new Lock(this);
m_notifs = new Notifs(this);
m_osd = new Osd(this);
m_overview = new Overview(this);
m_screenshot = new Screenshot(this);
m_services = new Services(this);
m_sidebar = new Sidebar(this);
m_utilities = new Utilities(this);
wireSignals(); // forwards every child's changed() up to our own changed()
connect(this, &ConfigSection::changed, this, &Config::scheduleSave);
m_saveTimer.setSingleShot(true);
m_saveTimer.setInterval(
300); // debounce: coalesce rapid-fire edits (e.g. dragging a slider)
connect(&m_saveTimer, &QTimer::timeout, this, &Config::flushAsync);
loadSync();
m_firstLoadDone = true;
}
Config* Config::create(QQmlEngine*, QJSEngine*) {
// The QML engine takes ownership of singletons created this way.
return new Config();
}
QString Config::filePath() const {
const QString dir =
QStandardPaths::writableLocation(QStandardPaths::ConfigLocation) +
QStringLiteral("/zshell");
QDir().mkpath(dir);
return dir + QStringLiteral("/config.json");
}
void Config::loadSync() {
m_loading =
true; // suppress scheduleSave() while properties are set from disk
QFile f(filePath());
if (f.open(QIODevice::ReadOnly)) {
const auto doc = QJsonDocument::fromJson(f.readAll());
if (doc.isObject()) fromJson(doc.object());
} else {
qInfo() << "Config: no existing config at" << filePath()
<< "- using defaults";
}
m_loading = false;
}
void Config::loadAsync() {
m_loading = true;
auto future = QtConcurrent::run([this]() {
QFile f(filePath());
if (f.open(QIODevice::ReadOnly)) {
const auto doc = QJsonDocument::fromJson(f.readAll());
if (doc.isObject()) {
QMetaObject::invokeMethod(this, [this, doc]() {
fromJson(doc.object());
m_loading = false;
}, Qt::QueuedConnection);
} else {
QMetaObject::invokeMethod(this, [this]() {
m_loading = false;
}, Qt::QueuedConnection);
}
} else {
qInfo() << "Config: failed to reload from" << filePath()
<< "- using in-memory values";
QMetaObject::invokeMethod(this, [this]() {
m_loading = false;
}, Qt::QueuedConnection);
}
});
m_loadFuture = future;
}
void Config::load() {
if (!m_firstLoadDone) {
loadSync();
} else {
loadAsync();
}
}
void Config::reloadAsync() {
loadAsync();
}
void Config::scheduleSave() {
if (m_loading) return;
m_saveTimer.start(); // restarts the window if it's already running
}
void Config::flushAsync() {
auto future = QtConcurrent::run([this]() {
const QByteArray data = QJsonDocument(toJson()).toJson(QJsonDocument::Indented);
writeAtomically(data);
});
}
void Config::saveNow() {
m_saveTimer.stop();
flushAsync();
}
void Config::writeAtomically(const QByteArray& data) {
// QSaveFile writes to a temp file next to the target and atomically
// renames it into place on commit() - a crash or power loss mid-write
// can never leave config.json half-written.
QSaveFile f(filePath());
if (!f.open(QIODevice::WriteOnly)) {
qWarning() << "Config: failed to open for atomic write:"
<< f.errorString();
return;
}
f.write(data);
if (!f.commit()) qWarning() << "Config: commit failed:" << f.errorString();
}