Zipper concept clarified.

xs/src/libslic3r/PrintExport.hpp

@@ -73,19 +73,21 @@ template<class T = void> struct VeryFalse { static const bool value = false; };
 
 // This has to be explicitly implemented in the gui layer or a default zlib
 // based implementation is needed.
-template<class Backend> class Zipper {
+template<class Backend> class LayerWriter {
 public:
 
-    Zipper(const std::string& /*zipfile_path*/) {
+    LayerWriter(const std::string& /*zipfile_path*/) {
         static_assert(VeryFalse<Backend>::value,
-                      "No zipper implementation provided!");
+                      "No layer writer implementation provided!");
     }
 
     void next_entry(const std::string& /*fname*/) {}
 
     std::string get_name() { return ""; }
 
-    template<class T> Zipper& operator<<(const T& /*arg*/) {
+    bool is_ok() { return false; }
+
+    template<class T> LayerWriter& operator<<(const T& /*arg*/) {
         return *this;
     }
 
@@ -203,62 +205,29 @@ public:
 
     inline void save(const std::string& path) {
         try {
-            Zipper<LyrFormat> zipper(path);
+            LayerWriter<LyrFormat> writer(path);
 
-            std::string project = zipper.get_name();
+            std::string project = writer.get_name();
 
-            zipper.next_entry(project);
+            writer.next_entry("config.ini");
-            zipper << createIniContent(project);
+            writer << createIniContent(project);
 
             for(unsigned i = 0; i < layers_rst_.size(); i++) {
                 if(layers_rst_[i].second.rdbuf()->in_avail() > 0) {
                     char lyrnum[6];
                     std::sprintf(lyrnum, "%.5d", i);
                     auto zfilename = project + lyrnum + ".png";
-                    zipper.next_entry(zfilename);
+                    writer.next_entry(zfilename);
-                    zipper << layers_rst_[i].second.rdbuf();
+                    writer << layers_rst_[i].second.rdbuf();
                     layers_rst_[i].second.str("");
                 }
             }
 
-            zipper.close();
+            writer.close();
-        } catch(std::exception&) {
+        } catch(std::exception& e) {
-            BOOST_LOG_TRIVIAL(error) << "Can't create zip file for layers! "
+            BOOST_LOG_TRIVIAL(error) << e.what();
-                                     << path;
             return;
         }
-
-//        wxFileName filepath(path);
-
-//        wxFFileOutputStream zipfile(path);
-
-//        std::string project = filepath.GetName().ToStdString();
-
-//        if(!zipfile.IsOk()) {
-//            BOOST_LOG_TRIVIAL(error) << "Can't create zip file for layers! "
-//                                     << path;
-//            return;
-//        }
-
-//        wxZipOutputStream zipstream(zipfile);
-//        wxStdOutputStream pngstream(zipstream);
-
-//        zipstream.PutNextEntry("config.ini");
-//        pngstream << createIniContent(project);
-
-//        for(unsigned i = 0; i < layers_rst_.size(); i++) {
-//            if(layers_rst_[i].second.rdbuf()->in_avail() > 0) {
-//                char lyrnum[6];
-//                std::sprintf(lyrnum, "%.5d", i);
-//                auto zfilename = project + lyrnum + ".png";
-//                zipstream.PutNextEntry(zfilename);
-//                pngstream << layers_rst_[i].second.rdbuf();
-//                layers_rst_[i].second.str("");
-//            }
-//        }
-
-//        zipstream.Close();
-//        zipfile.Close();
     }
 
     void saveLayer(unsigned lyr, const std::string& path) {

xs/src/slic3r/AppController.cpp

@@ -18,9 +18,6 @@
 #include <Model.hpp>
 #include <Utils.hpp>
 
-#include <wx/stdstream.h>
-#include <wx/wfstream.h>
-#include <wx/zipstrm.h>
 
 namespace Slic3r {
 
@@ -290,41 +287,21 @@ void PrintController::slice()
     slice(pri);
 }
 
-struct wxZipper {};
+template<> class LayerWriter<Zipper> {
-
+    Zipper m_zip;
-template<> class Zipper<wxZipper> {
-    wxFileName m_fpath;
-    wxFFileOutputStream m_zipfile;
-    wxZipOutputStream m_zipstream;
-    wxStdOutputStream m_pngstream;
 public:
 
-    Zipper(const std::string& zipfile_path):
+    inline LayerWriter(const std::string& zipfile_path): m_zip(zipfile_path) {}
-        m_fpath(zipfile_path),
+
-        m_zipfile(zipfile_path),
+    inline void next_entry(const std::string& fname) { m_zip.next_entry(fname); }
-        m_zipstream(m_zipfile),
+
-        m_pngstream(m_zipstream)
+    inline std::string get_name() const { return m_zip.get_name(); }
-    {
+
-        if(!m_zipfile.IsOk())
+    template<class T> inline LayerWriter& operator<<(const T& arg) {
-            throw std::runtime_error(L("Cannot create zip file."));
+        m_zip.stream() << arg; return *this;
     }
 
-    void next_entry(const std::string& fname) {
+    inline void close() { m_zip.close(); }
-        m_zipstream.PutNextEntry(fname);
-    }
-
-    std::string get_name() {
-        return m_fpath.GetName().ToStdString();
-    }
-
-    template<class T> Zipper& operator<<(const T& arg) {
-        m_pngstream << arg; return *this;
-    }
-
-    void close() {
-        m_zipstream.Close();
-        m_zipfile.Close();
-    }
 };
 
 void PrintController::slice_to_png()
@@ -428,7 +405,7 @@ void PrintController::slice_to_png()
     });
 
     try {
-        print_to<FilePrinterFormat::PNG, wxZipper>( *print, exd.zippath,
+        print_to<FilePrinterFormat::PNG, Zipper>( *print, exd.zippath,
                     exd.width_mm, exd.height_mm,
                     exd.width_px, exd.height_px,
                     exd.exp_time_s, exd.exp_time_first_s);
@@ -439,6 +416,7 @@ void PrintController::slice_to_png()
 
     scale_back();
     if(print->canceled()) print->restart();
+    print->set_status_default();
 }
 
 const PrintConfig &PrintController::config() const

xs/src/slic3r/AppController.hpp

@@ -165,6 +165,23 @@ protected:
     ProgresIndicatorPtr global_progressind_;
 };
 
+class Zipper {
+    struct Impl;
+    std::unique_ptr<Impl> m_impl;
+public:
+
+    Zipper(const std::string& zipfilepath);
+    ~Zipper();
+
+    void next_entry(const std::string& fname);
+
+    std::string get_name() const;
+
+    std::ostream& stream();
+
+    void close();
+};
+
 /**
  * @brief Implementation of the printing logic.
  */

xs/src/slic3r/AppControllerWx.cpp

@@ -1,5 +1,9 @@
 #include "AppController.hpp"
 
+#include <wx/stdstream.h>
+#include <wx/wfstream.h>
+#include <wx/zipstrm.h>
+
 #include <thread>
 #include <future>
 
@@ -98,6 +102,51 @@ bool AppControllerBoilerplate::report_issue(
 
 wxDEFINE_EVENT(PROGRESS_STATUS_UPDATE_EVENT, wxCommandEvent);
 
+struct Zipper::Impl {
+    wxFileName m_fpath;
+    wxFFileOutputStream m_zipfile;
+    wxZipOutputStream m_zipstream;
+    wxStdOutputStream m_pngstream;
+
+    Impl(const std::string& zipfile_path):
+        m_fpath(zipfile_path),
+        m_zipfile(zipfile_path),
+        m_zipstream(m_zipfile),
+        m_pngstream(m_zipstream)
+    {
+        if(!m_zipfile.IsOk())
+            throw std::runtime_error(L("Cannot create zip file."));
+    }
+};
+
+Zipper::Zipper(const std::string &zipfilepath)
+{
+    m_impl.reset(new Impl(zipfilepath));
+}
+
+Zipper::~Zipper() {}
+
+void Zipper::next_entry(const std::string &fname)
+{
+    m_impl->m_zipstream.PutNextEntry(fname);
+}
+
+std::string Zipper::get_name() const
+{
+    return m_impl->m_fpath.GetName().ToStdString();
+}
+
+std::ostream &Zipper::stream()
+{
+    return m_impl->m_pngstream;
+}
+
+void Zipper::close()
+{
+    m_impl->m_zipstream.Close();
+    m_impl->m_zipfile.Close();
+}
+
 namespace  {
 
 /*