mirror of
https://github.com/cmclark00/retro-imager.git
synced 2025-05-18 16:05:21 +01:00
qml: move OS list fetch to backend
- Simple implementation of OS list fetching in backend - Replace frontend OS list fetching by calls to backend - OS list updates are brought in asynchronously, avoiding excessive UI blockage. - "Erase" and "Custom" OS list options are always present, even in a no-internet scenario Based-On: cillian64/rpi-imager/oslist_backend
This commit is contained in:
Tom Dewey
Tom Dewey
parent
54ae0f889c
commit
673b3c7a33
4 changed files with 274 additions and 135 deletions
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@ -53,6 +53,10 @@
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#include <QtPlatformHeaders/QEglFSFunctions>
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#endif
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namespace {
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constexpr uint MAX_SUBITEMS_DEPTH = 16;
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} // namespace anonymous
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ImageWriter::ImageWriter(QObject *parent)
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: QObject(parent), _repo(QUrl(QString(OSLIST_URL))), _dlnow(0), _verifynow(0),
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_engine(nullptr), _thread(nullptr), _verifyEnabled(false), _cachingEnabled(false),
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@ -167,6 +171,10 @@ ImageWriter::ImageWriter(QObject *parent)
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}
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}
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//_currentKeyboard = "us";
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// Centralised network manager, for fetching OS lists
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_networkManager = std::make_unique<QNetworkAccessManager>(this);
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connect(_networkManager.get(), SIGNAL(finished(QNetworkReply *)), this, SLOT(handleNetworkRequestFinished(QNetworkReply *)));
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}
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ImageWriter::~ImageWriter()
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@ -416,6 +424,166 @@ void ImageWriter::setCustomOsListUrl(const QUrl &url)
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_repo = url;
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}
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namespace {
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QJsonArray findAndInsertJsonResult(QJsonArray parent_list, QJsonArray incomingBody, QUrl referenceUrl, uint8_t count = 0) {
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if (count > MAX_SUBITEMS_DEPTH) {
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qDebug() << "Aborting insertion of subitems, exceeded maximum configured limit of " << MAX_SUBITEMS_DEPTH << " levels.";
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return {};
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}
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QJsonArray returnArray = {};
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for (auto ositem : parent_list) {
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auto ositemObject = ositem.toObject();
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if (ositemObject.contains("subitems")) {
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// Recurse!
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ositemObject["subitems"] = findAndInsertJsonResult(ositemObject["subitems"].toArray(), incomingBody, referenceUrl, count++);
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} else if (ositemObject.contains("subitems_url")) {
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if ( !ositemObject["subitems_url"].toString().compare(referenceUrl.toString())) {
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// qDebug() << "Replacing URL [" << ositemObject["subitems_url"] << "] with body";
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ositemObject.insert("subitems", incomingBody);
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ositemObject.remove("subitems_url");
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} else {
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//qDebug() << "Moving to next match for " << referenceUrl << " as we didn't match with " << ositemObject["subitems_url"].toString();
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}
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}
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returnArray += ositemObject;
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}
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return returnArray;
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}
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void findAndQueueUnresolvedSubitemsJson(QJsonArray incoming, QNetworkAccessManager *manager, uint8_t count = 0) {
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// Step 2: Queue the other downloads.
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if (count > MAX_SUBITEMS_DEPTH) {
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qDebug() << "Aborting fetch of subitems JSON, exceeded maximum configured limit of " << MAX_SUBITEMS_DEPTH << " levels.";
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return;
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}
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for (auto entry : incoming) {
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auto entryObject = entry.toObject();
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if (entryObject.contains("subitems")) {
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// No need to handle a return - this isn't processing a list, it's searching and queuing downloads.
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findAndQueueUnresolvedSubitemsJson(entryObject["subitems"].toArray(), manager, count++);
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} else if (entryObject.contains("subitems_url")) {
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auto url = entryObject["subitems_url"].toString();
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manager->get(QNetworkRequest(url));
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}
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}
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}
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} // namespace anonymous
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void ImageWriter::setHWFilterList(const QByteArray &json) {
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QJsonDocument json_document = QJsonDocument::fromJson(json);
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_deviceFilter = json_document.array();
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}
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void ImageWriter::handleNetworkRequestFinished(QNetworkReply *data) {
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// Defer deletion
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//data->deleteLater();
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if (data->error() == QNetworkReply::NoError) {
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auto httpStatusCode = data->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
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if (httpStatusCode >= 200 && httpStatusCode < 300) {
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// TODO: Indicate download complete, hand back for re-assembly. Userdata to point to qJsonDocument?
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auto responseDoc = QJsonDocument::fromJson(data->readAll()).object();
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if (responseDoc.contains("os_list")) {
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// Step 1: Insert the items into the canonical JSON document.
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// It doesn't matter that these may still contain subitems_url items
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// As these will be fixed up as the subitems_url instances are blinked in
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if (_completeOsList.isEmpty()) {
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std::lock_guard<std::mutex> lock(_deviceListMutationMutex);
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_completeOsList = QJsonDocument(responseDoc);
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} else {
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// TODO: Insert into current graph
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std::lock_guard<std::mutex> lock(_deviceListMutationMutex);
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auto new_list = findAndInsertJsonResult(_completeOsList["os_list"].toArray(), responseDoc["os_list"].toArray(), data->url());
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auto imager_meta = _completeOsList["imager"].toObject();
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_completeOsList = QJsonDocument(QJsonObject({
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{"imager", imager_meta},
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{"os_list", new_list}
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}));
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}
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// TODO: Find and queue subitem downloads. Recursively?
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findAndQueueUnresolvedSubitemsJson(responseDoc["os_list"].toArray(), _networkManager.get());
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emit osListPrepared();
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} else {
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qDebug() << "Incorrectly formatted OS list at: " << data->url();
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}
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} else if (httpStatusCode >= 300 && httpStatusCode < 400) {
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auto request = QNetworkRequest(data->url());
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request.setAttribute(QNetworkRequest::RedirectionTargetAttribute, QNetworkRequest::NoLessSafeRedirectPolicy);
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data->manager()->get(request);
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// maintain manager
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return;
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} else if (httpStatusCode >= 400 && httpStatusCode < 600) {
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// HTTP Error
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qDebug() << "Failed to fetch URL [" << data->url() << "], got: " << httpStatusCode;
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} else {
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// Completely unknown error, worth logging separately
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qDebug() << "Failed to fetch URL [" << data->url() << "], got unknown response code: " << httpStatusCode;
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}
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} else {
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// QT Error.
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qDebug() << "Unrecognised QT error: " << data->error() << ", explainer: " << data->errorString();
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}
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}
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/** You are expected to have called setDeviceFilter from the UI before making this call.
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* If you have not, you will effectively get the full list. With some extras.
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*/
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QByteArray ImageWriter::getFilteredOSlist() {
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QJsonArray referenceArray = {};
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QJsonObject referenceImagerMeta = {};
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if (!_completeOsList.isEmpty()) {
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std::lock_guard<std::mutex> lock(_deviceListMutationMutex);
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referenceArray = _completeOsList.object()["os_list"].toArray();
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referenceImagerMeta = _completeOsList.object()["imager"].toObject();
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}
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referenceArray.append(QJsonObject({
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{"name", tr("Erase")},
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{"description", tr("Format card as FAT32")},
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{"icon", "icons/erase.png"},
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{"url", "internal://format"},
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}));
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referenceArray.append(QJsonObject({
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{"name", tr("Use custom")},
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{"description", tr("Select a custom .img from your computer")},
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{"icon", "icons/use_custom.png"},
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{"url", ""},
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}));
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return QJsonDocument(
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QJsonObject({
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{"imager", referenceImagerMeta},
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{"os_list", referenceArray},
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}
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)).toJson();
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}
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void ImageWriter::beginOSListFetch() {
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QNetworkRequest request = QNetworkRequest(constantOsListUrl());
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request.setAttribute(QNetworkRequest::RedirectPolicyAttribute,
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QNetworkRequest::NoLessSafeRedirectPolicy);
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// This will set up a chain of requests that culiminate in the eventual fetch and assembly of
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// a complete cached OS list.
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_networkManager->get(QNetworkRequest(request));
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}
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void ImageWriter::setCustomCacheFile(const QString &cacheFile, const QByteArray &sha256)
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{
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_cacheFileName = cacheFile;
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@ -6,6 +6,11 @@
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* Copyright (C) 2020 Raspberry Pi Ltd
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*/
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#include <memory>
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#include <QJsonArray>
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#include <QJsonDocument>
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#include <QNetworkAccessManager>
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#include <QObject>
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#include <QTimer>
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#include <QUrl>
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@ -74,6 +79,15 @@ public:
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/* Set custom repository */
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Q_INVOKABLE void setCustomOsListUrl(const QUrl &url);
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/* Get the cached OS list. This may be empty if network connectivity is not available. */
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Q_INVOKABLE QByteArray getFilteredOSlist();
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/** Begin the asynchronous fetch of the OS lists, and associated sublists. */
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Q_INVOKABLE void beginOSListFetch();
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/** Set the HW filter, for a filtered view of the OS list */
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Q_INVOKABLE void setHWFilterList(const QByteArray &json);
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/* Set custom cache file */
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void setCustomCacheFile(const QString &cacheFile, const QByteArray &sha256);
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@ -144,6 +158,7 @@ signals:
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void finalizing();
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void networkOnline();
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void preparationStatusUpdate(QVariant msg);
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void osListPrepared();
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protected slots:
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@ -160,6 +175,16 @@ protected slots:
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void onFinalizing();
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void onTimeSyncReply(QNetworkReply *reply);
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void onPreparationStatusUpdate(QString msg);
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void handleNetworkRequestFinished(QNetworkReply *data);
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private:
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// Recursively walk all the entries with subitems and, for any which
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// refer to an external JSON list, fetch the list and put it in place.
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void fillSubLists(QJsonArray &topLevel);
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std::unique_ptr<QNetworkAccessManager> _networkManager;
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QJsonDocument _completeOsList;
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QJsonArray _deviceFilter;
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std::mutex _deviceListMutationMutex;
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protected:
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QUrl _src, _repo;
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@ -346,6 +346,7 @@ int main(int argc, char *argv[])
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qmlwindow->connect(&imageWriter, SIGNAL(cancelled()), qmlwindow, SLOT(onCancelled()));
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qmlwindow->connect(&imageWriter, SIGNAL(finalizing()), qmlwindow, SLOT(onFinalizing()));
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qmlwindow->connect(&imageWriter, SIGNAL(networkOnline()), qmlwindow, SLOT(fetchOSlist()));
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qmlwindow->connect(&imageWriter, SIGNAL(osListPrepared()), qmlwindow, SLOT(onOsListPrepared()));
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#ifndef QT_NO_WIDGETS
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/* Set window position */
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@ -374,6 +375,8 @@ int main(int argc, char *argv[])
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qmlwindow->setProperty("y", y);
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#endif
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imageWriter.beginOSListFetch();
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int rc = app.exec();
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#ifndef QT_NO_WIDGETS
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213
src/main.qml
213
src/main.qml
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@ -1221,29 +1221,6 @@ ApplicationWindow {
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}
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}
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/* Utility functions */
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function httpRequest(url, callback) {
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var xhr = new XMLHttpRequest();
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xhr.timeout = 5000
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xhr.onreadystatechange = (function(x) {
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return function() {
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if (x.readyState === x.DONE)
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{
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if (x.status === 200)
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{
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callback(x)
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}
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else
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{
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onError(qsTr("Error downloading OS list from Internet"))
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}
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}
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}
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})(xhr)
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xhr.open("GET", url)
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xhr.send()
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}
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/* Slots for signals imagewrite emits */
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function onDownloadProgress(now,total) {
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var newPos
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@ -1289,6 +1266,11 @@ ApplicationWindow {
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progressText.text = qsTr("Preparing to write... (%1)").arg(msg)
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}
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function onOsListPrepared() {
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console.log("OS list updated.");
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fetchOSlist()
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}
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function resetWriteButton() {
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progressText.visible = false
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progressBar.visible = false
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@ -1454,42 +1436,42 @@ ApplicationWindow {
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}
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function oslistFromJson(o) {
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var oslist = false
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var oslist_parsed = false
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var lang_country = Qt.locale().name
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if ("os_list_"+lang_country in o) {
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oslist = o["os_list_"+lang_country]
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oslist_parsed = o["os_list_"+lang_country]
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}
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else if (lang_country.includes("_")) {
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var lang = lang_country.substr(0, lang_country.indexOf("_"))
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if ("os_list_"+lang in o) {
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oslist = o["os_list_"+lang]
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oslist_parsed = o["os_list_"+lang]
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}
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}
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if (!oslist) {
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if (!oslist_parsed) {
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if (!"os_list" in o) {
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onError(qsTr("Error parsing os_list.json"))
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return false
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}
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oslist = o["os_list"]
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oslist_parsed = o["os_list"]
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}
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if (hwTags != "") {
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filterItems(oslist, JSON.parse(hwTags), hwTagMatchingType)
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filterItems(oslist_parsed, JSON.parse(hwTags), hwTagMatchingType)
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}
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checkForRandom(oslist)
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checkForRandom(oslist_parsed)
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/* Flatten subitems to subitems_json */
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for (var i in oslist) {
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var entry = oslist[i];
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for (var i in oslist_parsed) {
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var entry = oslist_parsed[i];
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if ("subitems" in entry) {
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entry["subitems_json"] = JSON.stringify(entry["subitems"])
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delete entry["subitems"]
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}
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}
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return oslist
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return oslist_parsed
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}
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function selectNamedOS(name, collection)
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@ -1508,80 +1490,54 @@ ApplicationWindow {
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}
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function fetchOSlist() {
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httpRequest(imageWriter.constantOsListUrl(), function (x) {
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var o = JSON.parse(x.responseText)
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var oslist = oslistFromJson(o)
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if (oslist === false)
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return
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osmodel.clear()
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for (var i in oslist) {
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osmodel.append(oslist[i])
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}
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var oslist_json = imageWriter.getFilteredOSlist();
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var o = JSON.parse(oslist_json)
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var oslist_parsed = oslistFromJson(o)
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if (oslist_parsed === false)
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return
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osmodel.clear()
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for (var i in oslist_parsed) {
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osmodel.append(oslist_parsed[i])
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}
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if ("imager" in o) {
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var imager = o["imager"]
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if ("imager" in o) {
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var imager = o["imager"]
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if ("devices" in imager)
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if ("devices" in imager)
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{
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deviceModel.clear()
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var devices = imager["devices"]
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for (var j in devices)
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{
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deviceModel.clear()
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var devices = imager["devices"]
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for (var j in devices)
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devices[j]["tags"] = JSON.stringify(devices[j]["tags"])
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deviceModel.append(devices[j])
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if ("default" in devices[j] && devices[j]["default"])
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{
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devices[j]["tags"] = JSON.stringify(devices[j]["tags"])
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deviceModel.append(devices[j])
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if ("default" in devices[j] && devices[j]["default"])
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{
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hwlist.currentIndex = deviceModel.count-1
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}
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}
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}
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if (imageWriter.getBoolSetting("check_version") && "latest_version" in imager && "url" in imager) {
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if (!imageWriter.isEmbeddedMode() && imageWriter.isVersionNewer(imager["latest_version"])) {
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updatepopup.url = imager["url"]
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updatepopup.openPopup()
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}
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}
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if ("default_os" in imager) {
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selectNamedOS(imager["default_os"], osmodel)
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}
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if (imageWriter.isEmbeddedMode()) {
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if ("embedded_default_os" in imager) {
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selectNamedOS(imager["embedded_default_os"], osmodel)
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}
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if ("embedded_default_destination" in imager) {
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imageWriter.startDriveListPolling()
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setDefaultDest.drive = imager["embedded_default_destination"]
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setDefaultDest.start()
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hwlist.currentIndex = deviceModel.count-1
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}
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}
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}
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/* Add in our 'special' items. */
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osmodel.append({
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url: "internal://format",
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icon: "icons/erase.png",
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extract_size: 0,
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image_download_size: 0,
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extract_sha256: "",
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contains_multiple_files: false,
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release_date: "",
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subitems_url: "",
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subitems_json: "",
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name: qsTr("Erase"),
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description: qsTr("Format card as FAT32"),
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tooltip: "",
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website: "",
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init_format: ""
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})
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osmodel.append({
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url: "",
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icon: "icons/use_custom.png",
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name: qsTr("Use custom"),
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description: qsTr("Select a custom .img from your computer")
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})
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})
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if (imageWriter.getBoolSetting("check_version") && "latest_version" in imager && "url" in imager) {
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if (!imageWriter.isEmbeddedMode() && imageWriter.isVersionNewer(imager["latest_version"])) {
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updatepopup.url = imager["url"]
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updatepopup.openPopup()
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}
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}
|
||||
if ("default_os" in imager) {
|
||||
selectNamedOS(imager["default_os"], osmodel)
|
||||
}
|
||||
if (imageWriter.isEmbeddedMode()) {
|
||||
if ("embedded_default_os" in imager) {
|
||||
selectNamedOS(imager["embedded_default_os"], osmodel)
|
||||
}
|
||||
if ("embedded_default_destination" in imager) {
|
||||
imageWriter.startDriveListPolling()
|
||||
setDefaultDest.drive = imager["embedded_default_destination"]
|
||||
setDefaultDest.start()
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
Timer {
|
||||
|
|
@ -1648,30 +1604,29 @@ ApplicationWindow {
|
|||
}
|
||||
|
||||
/* Reload list */
|
||||
httpRequest(imageWriter.constantOsListUrl(), function (x) {
|
||||
var o = JSON.parse(x.responseText)
|
||||
var oslist = oslistFromJson(o)
|
||||
if (oslist === false)
|
||||
return
|
||||
var oslist_json = imageWriter.getFilteredOSlist();
|
||||
var o = JSON.parse(oslist_json)
|
||||
var oslist_parsed = oslistFromJson(o)
|
||||
if (oslist_parsed === false)
|
||||
return
|
||||
|
||||
/* As we're filtering the OS list, we need to ensure we present a 'Recommended' OS.
|
||||
* To do this, we exploit a convention of how we build the OS list. By convention,
|
||||
* the preferred OS for a device is listed at the top level of the list, and is at the
|
||||
* lowest index. So..
|
||||
*/
|
||||
if (oslist.length != 0) {
|
||||
var candidate = oslist[0]
|
||||
/* As we're filtering the OS list, we need to ensure we present a 'Recommended' OS.
|
||||
* To do this, we exploit a convention of how we build the OS list. By convention,
|
||||
* the preferred OS for a device is listed at the top level of the list, and is at the
|
||||
* lowest index. So..
|
||||
*/
|
||||
if (oslist_parsed.length != 0) {
|
||||
var candidate = oslist_parsed[0]
|
||||
|
||||
if ("description" in candidate && !("subitems" in candidate)) {
|
||||
candidate["description"] += " (Recommended)"
|
||||
}
|
||||
if ("description" in candidate && !("subitems" in candidate)) {
|
||||
candidate["description"] += " (Recommended)"
|
||||
}
|
||||
}
|
||||
|
||||
osmodel.remove(0, osmodel.count-2)
|
||||
for (var i in oslist) {
|
||||
osmodel.insert(osmodel.count-2, oslist[i])
|
||||
}
|
||||
})
|
||||
osmodel.clear()
|
||||
for (var i in oslist_parsed) {
|
||||
osmodel.append(oslist_parsed[i])
|
||||
}
|
||||
|
||||
// When the HW device is changed, reset the OS selection otherwise
|
||||
// you get a weird effect with the selection moving around in the list
|
||||
|
|
@ -1732,19 +1687,7 @@ ApplicationWindow {
|
|||
}
|
||||
else
|
||||
{
|
||||
ospopup.categorySelected = d.name
|
||||
var suburl = d.subitems_url
|
||||
var m = newSublist()
|
||||
|
||||
httpRequest(suburl, function (x) {
|
||||
var o = JSON.parse(x.responseText)
|
||||
var oslist = oslistFromJson(o)
|
||||
if (oslist === false)
|
||||
return
|
||||
for (var i in oslist) {
|
||||
m.append(oslist[i])
|
||||
}
|
||||
})
|
||||
console.log("Failure: Backend should have pre-flattened the JSON!");
|
||||
|
||||
osswipeview.itemAt(osswipeview.currentIndex+1).currentIndex = (selectFirstSubitem === true) ? 0 : -1
|
||||
osswipeview.incrementCurrentIndex()
|
||||
|
|
@ -1757,9 +1700,9 @@ ApplicationWindow {
|
|||
if (imageWriter.mountUsbSourceMedia()) {
|
||||
var m = newSublist()
|
||||
|
||||
var oslist = JSON.parse(imageWriter.getUsbSourceOSlist())
|
||||
for (var i in oslist) {
|
||||
m.append(oslist[i])
|
||||
var usboslist = JSON.parse(imageWriter.getUsbSourceOSlist())
|
||||
for (var i in usboslist) {
|
||||
m.append(usboslist[i])
|
||||
}
|
||||
osswipeview.itemAt(osswipeview.currentIndex+1).currentIndex = (selectFirstSubitem === true) ? 0 : -1
|
||||
osswipeview.incrementCurrentIndex()
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue