Fix of output file dialog extension template for OSX:

When opening a "Save" file dialog with a default output file name,
OSX file dialog strips the provided extension and replaces it
with the default extension. This causes issues with a custom
file output template, where a non-default file extension is specified.

This commit changes the function to generate file dialog templates
so that if a default extension is provided, it is emitted
as first into the extension template.

Fixes Post Processing passes wrong name #7190

src/slic3r/GUI/GUI_App.cpp

@@ -12,6 +12,7 @@
 #include <exception>
 #include <cstdlib>
 #include <regex>
+#include <string_view>
 #include <boost/algorithm/string/predicate.hpp>
 #include <boost/algorithm/string.hpp>
 #include <boost/format.hpp>
@@ -97,6 +98,8 @@
     #include <gtk/gtk.h>
 #endif
 
+using namespace std::literals;
+
 namespace Slic3r {
 namespace GUI {
 
@@ -471,39 +474,86 @@ static bool run_updater_win()
 }
 #endif //_WIN32
 
+struct FileWildcards {
+    std::string_view              title;
+    std::vector<std::string_view> file_extensions;
+};
+
+static const FileWildcards file_wildcards_by_type[FT_SIZE] = {
+    /* FT_STL */     { "STL files"sv,       { ".stl"sv } },
+    /* FT_OBJ */     { "OBJ files"sv,       { ".obj"sv } },
+    /* FT_AMF */     { "AMF files"sv,       { ".amf"sv, ".zip.amf"sv, ".xml"sv } },
+    /* FT_3MF */     { "3MF files"sv,       { ".3mf"sv } },
+    /* FT_GCODE */   { "G-code files"sv,    { ".gcode"sv, ".gco"sv, ".g"sv, ".ngc"sv } },
+    /* FT_MODEL */   { "Known files"sv,     { ".stl"sv, ".obj"sv, ".3mf"sv, ".amf"sv, ".zip.amf"sv, ".xml"sv } },
+    /* FT_PROJECT */ { "Project files"sv,   { ".3mf"sv, ".amf"sv, ".zip.amf"sv } },
+    /* FT_GALLERY */ { "Known files"sv,     { ".stl"sv, ".obj"sv } },
+
+    /* FT_INI */     { "INI files"sv,       { ".ini"sv } },
+    /* FT_SVG */     { "SVG files"sv,       { ".svg"sv } },
+
+    /* FT_TEX */     { "Texture"sv,         { ".png"sv, ".svg"sv } },
+
+    /* FT_SL1 */     { "Masked SLA files"sv, { ".sl1"sv, ".sl1s"sv } },
+};
+
+// This function produces a Win32 file dialog file template mask to be consumed by wxWidgets on all platforms.
+// The function accepts a custom extension parameter. If the parameter is provided, the custom extension
+// will be added as a fist to the list. This is important for a "file save" dialog on OSX, which strips
+// an extension from the provided initial file name and substitutes it with the default extension (the first one in the template).
 wxString file_wildcards(FileType file_type, const std::string &custom_extension)
 {
-    static const std::string defaults[FT_SIZE] = {
-        /* FT_STL */     "STL files (*.stl)|*.stl;*.STL",
-        /* FT_OBJ */     "OBJ files (*.obj)|*.obj;*.OBJ",
-        /* FT_AMF */     "AMF files (*.amf)|*.zip.amf;*.amf;*.AMF;*.xml;*.XML",
-        /* FT_3MF */     "3MF files (*.3mf)|*.3mf;*.3MF;",
-        /* FT_GCODE */   "G-code files (*.gcode, *.gco, *.g, *.ngc)|*.gcode;*.GCODE;*.gco;*.GCO;*.g;*.G;*.ngc;*.NGC",
-        /* FT_MODEL */   "Known files (*.stl, *.obj, *.amf, *.xml, *.3mf, *.prusa)|*.stl;*.STL;*.obj;*.OBJ;*.amf;*.AMF;*.xml;*.XML;*.3mf;*.3MF",
-        /* FT_PROJECT */ "Project files (*.3mf, *.amf)|*.3mf;*.3MF;*.amf;*.AMF",
-        /* FT_GALLERY */ "Known files (*.stl, *.obj)|*.stl;*.STL;*.obj;*.OBJ",
+    const FileWildcards data = file_wildcards_by_type[file_type];
+    std::string title;
+    std::string mask;
+    std::string custom_ext_lower;
 
-        /* FT_INI */     "INI files (*.ini)|*.ini;*.INI",
-        /* FT_SVG */     "SVG files (*.svg)|*.svg;*.SVG",
-
-        /* FT_TEX */     "Texture (*.png, *.svg)|*.png;*.PNG;*.svg;*.SVG",
-
-        /* FT_SL1 */     "Masked SLA files (*.sl1, *.sl1s)|*.sl1;*.SL1;*.sl1s;*.SL1S",
-        // Workaround for OSX file picker, for some reason it always saves with the 1st extension.
-        /* FT_SL1S */    "Masked SLA files (*.sl1s, *.sl1)|*.sl1s;*.SL1S;*.sl1;*.SL1",
-    };
-
-	std::string out = defaults[file_type];
     if (! custom_extension.empty()) {
-        // Find the custom extension in the template.
-        if (out.find(std::string("*") + custom_extension + ",") == std::string::npos && out.find(std::string("*") + custom_extension + ")") == std::string::npos) {
-            // The custom extension was not found in the template.
-            // Append the custom extension to the wildcards, so that the file dialog would not add the default extension to it.
-			boost::replace_first(out, ")|", std::string(", *") + custom_extension + ")|");
-			out += std::string(";*") + custom_extension;
+        // Generate an extension into the title mask and into the list of extensions.
+        custom_ext_lower = custom_extension;
+        boost::to_lower(custom_ext_lower);
+        std::string custom_ext_upper = custom_extension;
+        boost::to_upper(custom_ext_upper);
+        if (custom_ext_lower == custom_extension) {
+            // Add a lower case version.
+            title = std::string("*") + custom_ext_lower;
+            mask = title;
+            // Add an upper case version.
+            mask  += ";*";
+            mask  += custom_ext_upper;
+        } else if (custom_ext_upper == custom_extension) {
+            // Add an upper case version.
+            title = std::string("*") + custom_ext_upper;
+            mask = title;
+            // Add a lower case version.
+            mask += ";*";
+            mask += custom_ext_lower;
+        } else {
+            // Add the mixed case version only.
+            title = std::string("*") + custom_extension;
+            mask = title;
         }
     }
-    return from_u8(out);
+
+    for (const std::string_view ext : data.file_extensions)
+        // Only add an extension if it was not added first as the custom extension.
+        if (ext != custom_ext_lower) {
+            if (title.empty()) {
+                title = "*";
+                title += ext;
+                mask  = title;
+            } else {
+                title += ", *";
+                title += ext;
+                mask  += ";*";
+                mask  += ext;
+            }
+            mask  += ";*";
+            std::string ext_upper{ ext };
+            boost::to_upper(ext_upper);
+            mask  += ext_upper;
+        }
+    return GUI::format("%s (%s)|%s", data.title, title, mask);
 }
 
 static std::string libslic3r_translate_callback(const char *s) { return wxGetTranslation(wxString(s, wxConvUTF8)).utf8_str().data(); }

src/slic3r/GUI/GUI_App.hpp

@@ -66,13 +66,11 @@ enum FileType
     FT_TEX,
 
     FT_SL1,
-	// Workaround for OSX file picker, for some reason it always saves with the 1st extension.
- 	FT_SL1S,
 
     FT_SIZE,
 };
 
-extern wxString file_wildcards(FileType file_type, const std::string &custom_extension = std::string());
+extern wxString file_wildcards(FileType file_type, const std::string &custom_extension = std::string{});
 
 enum ConfigMenuIDs {
     ConfigMenuWizard,

src/slic3r/GUI/Plater.cpp

@@ -5721,7 +5721,7 @@ void Plater::export_gcode(bool prefer_removable)
         wxFileDialog dlg(this, (printer_technology() == ptFFF) ? _L("Save G-code file as:") : _L("Save SL1 / SL1S file as:"),
             start_dir,
             from_path(default_output_file.filename()),
-            GUI::file_wildcards((printer_technology() == ptFFF) ? FT_GCODE : boost::iequals(ext, ".sl1s") ? FT_SL1S : FT_SL1, ext),
+            GUI::file_wildcards((printer_technology() == ptFFF) ? FT_GCODE : FT_SL1, ext),
             wxFD_SAVE | wxFD_OVERWRITE_PROMPT
         );
         if (dlg.ShowModal() == wxID_OK) {