Improve theme editor usability so themes can be set from it

common/themes/appearance_tab_widget.cpp

@@ -189,6 +189,22 @@ AppearanceTabWidget::AppearanceTabWidget(
             themeEditor->setAttribute(Qt::WA_DeleteOnClose);
             connect(themeEditor, &ThemeEditorDialog::themeJsonChanged, this,
                     [this](const QJsonObject &json) { this->applyTheme(json); });
+            connect(themeEditor, &ThemeEditorDialog::saveToLibraryRequested, this,
+                    [this](const QJsonObject &json) {
+                        if (!this->repository)
+                            return;
+                        const QString id = this->repository->saveUserTheme(json);
+                        this->repopulateCombos();
+                        const bool isLight = (json["meta"].toObject()["variant"].toString() == "light");
+                        if (isLight)
+                            selectInCombo(this->lightCombo, id);
+                        else
+                            selectInCombo(this->darkCombo, id);
+                        if (this->config && this->config->selection().mode == ThemeMode::ForcedTheme)
+                            selectInCombo(this->customCombo, id);
+                        if (this->themeEditor)
+                            this->themeEditor->updateSavedId(id);
+                    });
         }
         themeEditor->show();
         themeEditor->raise();

common/themes/theme_editor_dialog.cpp

@@ -150,14 +150,19 @@ ThemeEditorDialog::ThemeEditorDialog(const QJsonObject &params, QWidget *parent)
     });
 
     // --- bottom buttons ---
-    auto *saveBtn = new QPushButton(tr("Save to file..."), this);
+    auto *saveLibBtn = new QPushButton(tr("Save and apply"), this);
+    auto *exportBtn = new QPushButton(tr("Export to file..."), this);
     auto *loadBtn = new QPushButton(tr("Load from file..."), this);
     auto *closeBtn = new QPushButton(tr("Close"), this);
-    connect(saveBtn, &QPushButton::clicked, this, &ThemeEditorDialog::saveToFile);
+    connect(saveLibBtn, &QPushButton::clicked, this, [this]() {
+        emit saveToLibraryRequested(this->params);
+    });
+    connect(exportBtn, &QPushButton::clicked, this, &ThemeEditorDialog::saveToFile);
     connect(loadBtn, &QPushButton::clicked, this, &ThemeEditorDialog::loadFromFile);
     connect(closeBtn, &QPushButton::clicked, this, &QDialog::close);
     auto *buttons = new QHBoxLayout();
-    buttons->addWidget(saveBtn);
+    buttons->addWidget(saveLibBtn);
+    buttons->addWidget(exportBtn);
     buttons->addWidget(loadBtn);
     buttons->addStretch();
     buttons->addWidget(closeBtn);
@@ -373,6 +378,14 @@ void ThemeEditorDialog::syncMetaFromParams()
     variantCombo->setCurrentIndex(variant == "light" ? 0 : 1);
 }
 
+void ThemeEditorDialog::updateSavedId(const QString &id)
+{
+    auto meta = params["meta"].toObject();
+    meta["id"] = id;
+    params["meta"] = meta;
+    idLabel->setText(id);
+}
+
 void ThemeEditorDialog::saveToFile()
 {
     // Assign a user-scoped UUID if the current id is builtin or empty

common/themes/theme_editor_dialog.h

@@ -21,8 +21,11 @@ public:
 
     QJsonObject currentParams() const { return params; }
 
+    void updateSavedId(const QString &id);
+
 signals:
     void themeJsonChanged(const QJsonObject &params);
+    void saveToLibraryRequested(const QJsonObject &json);
 
 private:
     void populate(QTreeWidgetItem *parent, const QJsonObject &obj, const QStringList &path);