Switch to current SLA profile if an imported archive doesn't contain it.

Send a warning notification if this happens. Also,if  there is no current SLA profile initialized, an error message will tell the user to switch to an SLA profile before importing.

fixes #6915

src/libslic3r/Format/SL1.cpp

@@ -203,7 +203,7 @@ RasterParams get_raster_params(const DynamicPrintConfig &cfg)
 
     if (!opt_disp_cols || !opt_disp_rows || !opt_disp_w || !opt_disp_h ||
         !opt_mirror_x || !opt_mirror_y || !opt_orient)
-        throw Slic3r::FileIOError("Invalid SL1 / SL1S file");
+        throw MissingProfileError("Invalid SL1 / SL1S file");
 
     RasterParams rstp;
 
@@ -229,7 +229,7 @@ SliceParams get_slice_params(const DynamicPrintConfig &cfg)
     auto *opt_init_layerh = cfg.option<ConfigOptionFloat>("initial_layer_height");
 
     if (!opt_layerh || !opt_init_layerh)
-        throw Slic3r::FileIOError("Invalid SL1 / SL1S file");
+        throw MissingProfileError("Invalid SL1 / SL1S file");
 
     return SliceParams{opt_layerh->getFloat(), opt_init_layerh->getFloat()};
 }
@@ -293,24 +293,34 @@ ConfigSubstitutions import_sla_archive(const std::string &zipfname, DynamicPrint
     return out.load(arch.profile, ForwardCompatibilitySubstitutionRule::Enable);
 }
 
+// If the profile is missing from the archive (older PS versions did not have
+// it), profile_out's initial value will be used as fallback. profile_out will be empty on
+// function return if the archive did not contain any profile.
 ConfigSubstitutions import_sla_archive(
     const std::string &      zipfname,
     Vec2i                    windowsize,
     indexed_triangle_set &           out,
-    DynamicPrintConfig &     profile,
+    DynamicPrintConfig &     profile_out,
     std::function<bool(int)> progr)
 {
     // Ensure minimum window size for marching squares
     windowsize.x() = std::max(2, windowsize.x());
     windowsize.y() = std::max(2, windowsize.y());
 
-    ArchiveData arch = extract_sla_archive(zipfname, "thumbnail");
+    std::string exclude_entries{"thumbnail"};
-    ConfigSubstitutions config_substitutions = profile.load(arch.profile, ForwardCompatibilitySubstitutionRule::Enable);
+    ArchiveData arch = extract_sla_archive(zipfname, exclude_entries);
+    DynamicPrintConfig profile_in, profile_use;
+    ConfigSubstitutions config_substitutions = profile_in.load(arch.profile, ForwardCompatibilitySubstitutionRule::Enable);
 
-    RasterParams rstp = get_raster_params(profile);
+    // If the archive contains an empty profile, use the one that was passed as output argument
+    // then replace it with the readed profile to report that it was empty.
+    profile_use = profile_in.empty() ? profile_out : profile_in;
+    profile_out = profile_in;
+
+    RasterParams rstp = get_raster_params(profile_use);
     rstp.win          = {windowsize.y(), windowsize.x()};
 
-    SliceParams slicp = get_slice_params(profile);
+    SliceParams slicp = get_slice_params(profile_use);
 
     std::vector<ExPolygons> slices =
         extract_slices_from_sla_archive(arch, rstp, progr);

src/libslic3r/Format/SL1.hpp

@@ -57,6 +57,8 @@ inline ConfigSubstitutions import_sla_archive(
     return import_sla_archive(zipfname, windowsize, out, profile, progr);
 }
 
+class MissingProfileError : public RuntimeError { using RuntimeError::RuntimeError; };
+
 } // namespace Slic3r::sla
 
 #endif // ARCHIVETRAITS_HPP

src/slic3r/GUI/Jobs/SLAImportJob.cpp

@@ -6,6 +6,7 @@
 #include "slic3r/GUI/GUI_App.hpp"
 #include "slic3r/GUI/Plater.hpp"
 #include "slic3r/GUI/GUI_ObjectList.hpp"
+#include "slic3r/GUI/NotificationManager.hpp"
 
 #include "libslic3r/Model.hpp"
 #include "libslic3r/PresetBundle.hpp"
@@ -144,16 +145,16 @@ void SLAImportJob::process()
     try {
         switch (p->sel) {
         case Sel::modelAndProfile:
-            p->config_substitutions = import_sla_archive(path, p->win, p->mesh, p->profile, progr);
-            break;
         case Sel::modelOnly:
-            p->config_substitutions = import_sla_archive(path, p->win, p->mesh, progr);
+            p->config_substitutions = import_sla_archive(path, p->win, p->mesh, p->profile, progr);
             break;
         case Sel::profileOnly:
             p->config_substitutions = import_sla_archive(path, p->profile);
             break;
         }
-
+    } catch (MissingProfileError &) {
+        p->err = _L("The archive doesn't contain any profile data. Try to import after switching "
+                    "to an SLA profile that can be used as fallback.").ToStdString();
     } catch (std::exception &ex) {
         p->err = ex.what();
     }
@@ -166,7 +167,7 @@ void SLAImportJob::reset()
 {
     p->sel     = Sel::modelAndProfile;
     p->mesh    = {};
-    p->profile = {};
+    p->profile = m_plater->sla_print().full_print_config();
     p->win     = {2, 2};
     p->path.Clear();
 }
@@ -202,7 +203,18 @@ void SLAImportJob::finalize()
 
     std::string name = wxFileName(p->path).GetName().ToUTF8().data();
 
-    if (!p->profile.empty()) {
+    if (p->profile.empty()) {
+        m_plater->get_notification_manager()->push_notification(
+        NotificationType::CustomNotification,
+        NotificationManager::NotificationLevel::WarningNotificationLevel,
+            _L("Loaded archive did not contain any profile data. "
+               "The current SLA profile was used as fallback.").ToStdString());
+    }
+
+    if (p->sel != Sel::modelOnly) {
+        if (p->profile.empty())
+            p->profile = m_plater->sla_print().full_print_config();
+
         const ModelObjectPtrs& objects = p->plater->model().objects;
         for (auto object : objects)
             if (object->volumes.size() > 1)