Clear save_copy preference values of saved copies (related to #1964)

data/pref.xml

@@ -433,7 +433,7 @@
       <option id="current_layer" type="bool" default="false" />
       <option id="position" type="render::OnionskinPosition" default="render::OnionskinPosition::BEHIND" />
     </section>
-    <section id="save_copy">
+    <section id="save_copy" canclear="true">
       <option id="filename" type="std::string" />
       <option id="resize_scale" type="double" default="1" />
       <option id="layer" type="std::string" />

src/app/commands/cmd_save_file.cpp

@@ -189,13 +189,7 @@ std::string SaveFileBaseCommand::saveAsDialog(
     //   https://github.com/aseprite/aseprite/issues/1964
     //
     auto& docPref = Preferences::instance().document(document);
-    docPref.saveCopy.filename(docPref.saveCopy.filename.defaultValue());
+    docPref.saveCopy.clearSection();
-    docPref.saveCopy.aniDir(docPref.saveCopy.aniDir.defaultValue());
-    docPref.saveCopy.applyPixelRatio(docPref.saveCopy.applyPixelRatio.defaultValue());
-    docPref.saveCopy.frameTag(docPref.saveCopy.frameTag.defaultValue());
-    docPref.saveCopy.layer(docPref.saveCopy.layer.defaultValue());
-    docPref.saveCopy.forTwitter(docPref.saveCopy.forTwitter.defaultValue());
-    docPref.saveCopy.resizeScale(docPref.saveCopy.resizeScale.defaultValue());
   }
 
   return filename;

src/app/pref/option.h

@@ -105,8 +105,10 @@ namespace app {
     void cleanDirtyFlag() { m_dirty = false; }
 
     void setValue(const T& newValue) {
-      if (m_value == newValue)
+      if (m_value == newValue) {
+        m_dirty = true;
         return;
+      }
 
       BeforeChange(newValue);
       if (m_section)
@@ -120,6 +122,11 @@ namespace app {
         m_section->AfterChange();
     }
 
+    void clearValue() {
+      m_value = m_default;
+      m_dirty = false;
+    }
+
 #ifdef ENABLE_SCRIPTING
     void pushLua(lua_State* L) override {
       script::push_value_to_lua<T>(L, m_value);

src/app/pref/option_io.h

@@ -17,19 +17,23 @@ namespace app {
 
   template<typename T>
   void load_option(Option<T>& opt) {
-    opt(get_config_value(opt.section(), opt.id(), opt.defaultValue()));
+    if (get_config_string(opt.section(), opt.id(), nullptr))
+      opt(get_config_value(opt.section(), opt.id(), opt.defaultValue()));
+    else
+      opt.setValueAndDefault(opt.defaultValue());
   }
 
   template<typename T>
   void load_option_with_migration(Option<T>& opt, const char* oldSection, const char* oldName) {
-    if (get_config_string(oldSection, oldName, NULL)) {
+    if (get_config_string(oldSection, oldName, nullptr)) {
       opt(get_config_value(oldSection, oldName, opt.defaultValue()));
       del_config_value(oldSection, oldName);
 
       opt.forceDirtyFlag();
     }
-    else
+    else {
-      opt(get_config_value(opt.section(), opt.id(), opt.defaultValue()));
+      load_option<T>(opt);
+    }
   }
 
   // Save

src/gen/pref_types.cpp

@@ -30,6 +30,8 @@ static void print_pref_class_def(TiXmlElement* elem, const std::string& classNam
 
   if (elem->Attribute("canforce"))
     std::cout << indent << "  void forceSection();\n";
+  if (elem->Attribute("canclear"))
+    std::cout << indent << "  void clearSection();\n";
 
   std::cout
     << indent << "  void load();\n"
@@ -126,7 +128,30 @@ static void print_pref_class_impl(TiXmlElement* elem, const std::string& prefix,
       }
       child = child->NextSiblingElement();
     }
+    std::cout
+      << "}\n";
+  }
 
+  // Section::clearSection()
+  if (elem->Attribute("canclear")) {
+    std::cout
+      << "\n"
+      << "void " << prefix << className << "::clearSection()\n"
+      << "{\n";
+
+    child = (elem->FirstChild() ? elem->FirstChild()->ToElement(): nullptr);
+    while (child) {
+      if (child->Value()) {
+        std::string name = child->Value();
+        const char* childId = child->Attribute("id");
+
+        if (name == "option") {
+          std::string memberName = convert_xmlid_to_cppid(childId, false);
+          std::cout << "  " << memberName << ".clearValue();\n";
+        }
+      }
+      child = child->NextSiblingElement();
+    }
     std::cout
       << "}\n";
   }