refactored TCEWritableComponent

inherits from new TCECustomWritableComponent
renamed as TCEWritableLfmTextComponent
added TCEWritableJsonComponent which derives from the same ancestor

src/ce_dcd.pas

@@ -16,7 +16,7 @@ type
    * Completion, hints and declaration finder automatically work on the current
    *   document: ICEMultiDocObserver.
    *)
-  TCEDcdWrapper = class(TWritableComponent, ICEProjectObserver, ICEMultiDocObserver)
+  TCEDcdWrapper = class(TWritableLfmTextComponent, ICEProjectObserver, ICEMultiDocObserver)
   private
     fTempLines: TStringList;
     //fPortNum: Word;

src/ce_libman.pas

@@ -27,7 +27,7 @@ type
   (**
    * Represents all the D libraries present on this system.
    *)
-  TLibraryManager = class(TWritableComponent)
+  TLibraryManager = class(TWritableLfmTextComponent)
   private
     fCol: TCollection;
     procedure setCol(const aValue: TCollection);

src/ce_options.pas

@@ -9,7 +9,7 @@ uses
 
 type
 
-  TCEOptions = class(TWritableComponent)
+  TCEOptions = class(TWritableLfmTextComponent)
   private
     fSubjPersObservers: TCECustomSubject;
   protected

src/ce_project.pas

@@ -21,7 +21,7 @@ type
  *
  * Basically it' s designed to provide the options for the dmd process.
  *)
-  TCEProject = class(TWritableComponent)
+  TCEProject = class(TWritableLfmTextComponent)
   private
     fOnChange: TNotifyEvent;
     fModified: boolean;

src/ce_staticmacro.pas

@@ -22,7 +22,7 @@ type
    * Shift + SPACE works automatically on the right editor (ICEMultiDocObserver)
    * Automatic insertion is handled in TCESynMemo.KeyUp()
    *)
-  TCEStaticEditorMacro = class(TWritableComponent, ICEMultiDocObserver)
+  TCEStaticEditorMacro = class(TWritableLfmTextComponent, ICEMultiDocObserver)
   private
     fCompletor: TSynAutoComplete;
     fMacros: TStringList;

src/ce_synmemo.pas

@@ -24,7 +24,7 @@ type
     property nestedIndex: Integer read fNestedIndex write fNestedIndex;
   end;
 
-  TCESynMemoCache = class(TWritableComponent)
+  TCESynMemoCache = class(TWritableLfmTextComponent)
   private
     fMemo: TCESynMemo;
     fFolds: TCollection;

src/ce_tools.pas

@@ -45,7 +45,7 @@ type
     destructor destroy; override;
   end;
 
-  TCETools = class(TWritableComponent, ICEMainMenuProvider)
+  TCETools = class(TWritableLfmTextComponent, ICEMainMenuProvider)
   private
     fTools: TCollection;
     function getTool(index: Integer): TCEToolItem;

src/ce_writablecomponent.pas

@@ -5,17 +5,20 @@ unit ce_writableComponent;
 interface
 
 uses
-  Classes, SysUtils, ce_common;
+  Classes, SysUtils, ce_common, typinfo, fpjson, jsonparser, fpjsonrtti, fpjsondataset;
 
 type
 
   (**
-   * The ancestor of classes which can be saved or reloaded to/from
-   * a text file. It's used each time some options or data have to
+   * The ancestor of classes which can be saved or reloaded to/from a file.
+   * It's used each time some options or data have to
    * persist from a cession to another, independently from the centralized
    * system provided by the ICESessionOptionObserver/Subject mechanism.
+   *
+   * The descendants overrides customLoadFromFile and customSaveToFile
+   * to save/load to/from a specific format.
    *)
-  TWritableComponent = class(TComponent)
+  TCustomWritableComponent = class(TComponent)
   protected
     fFilename: string;
     fHasLoaded: boolean;
@@ -25,10 +28,8 @@ type
     procedure beforeSave; virtual;
     procedure afterLoad; virtual;
     procedure afterSave; virtual;
-    procedure readerPropNoFound(Reader: TReader; Instance: TPersistent;
-      var PropName: string; IsPath: boolean; var Handled, Skip: Boolean); virtual;
-    procedure readerError(Reader: TReader; const Message: string;
-      var Handled: Boolean); virtual;
+    procedure customLoadFromFile(const aFilename: string); virtual; abstract;
+    procedure customSaveToFile(const aFilename: string); virtual; abstract;
   public
     procedure saveToFile(const aFilename: string); virtual;
     procedure loadFromFile(const aFilename: string); virtual;
@@ -38,49 +39,66 @@ type
     property hasSaved: boolean read fHasSaved;
   end;
 
+  (**
+   * The ancestor of classes which can be saved or reloaded to/from
+   * a LFM text file.
+   * By default, reading errors are skipped and no exception is raised.
+   *)
+  TWritableLfmTextComponent = class(TCustomWritableComponent)
+  protected
+    procedure customLoadFromFile(const aFilename: string); override;
+    procedure customSaveToFile(const aFilename: string); override;
+    procedure readerPropNoFound(Reader: TReader; Instance: TPersistent;
+      var PropName: string; IsPath: boolean; var Handled, Skip: Boolean); virtual;
+    procedure readerError(Reader: TReader; const Message: string;
+      var Handled: Boolean); virtual;
+  end;
+
+  (**
+   * The ancestor of classes which can be saved or reloaded to/from
+   * a JSON file.
+   * By default, reading errors are skipped and no exception is raised.
+   *)
+  TWritableJsonComponent = class(TCustomWritableComponent)
+  protected
+    procedure propertyError(Sender : TObject; AObject : TObject; Info : PPropInfo;
+      AValue : TJSONData; Error : Exception; Var doContinue : Boolean); virtual;
+    procedure restoreProperty(Sender : TObject; AObject : TObject; Info : PPropInfo;
+      AValue : TJSONData; Var Handled : Boolean); virtual;
+    procedure customLoadFromFile(const aFilename: string); override;
+    procedure customSaveToFile(const aFilename: string); override;
+  end;
+
 implementation
 
-procedure TWritableComponent.beforeSave;
+{$REGION TCustomWritableComponent ----------------------------------------------}
+procedure TCustomWritableComponent.beforeSave;
 begin
 end;
 
-procedure TWritableComponent.beforeLoad;
+procedure TCustomWritableComponent.beforeLoad;
 begin
 end;
 
-procedure TWritableComponent.afterLoad;
+procedure TCustomWritableComponent.afterLoad;
 begin
 end;
 
-procedure TWritableComponent.afterSave;
+procedure TCustomWritableComponent.afterSave;
 begin
 end;
 
-procedure TWritableComponent.setFilename(const aValue: string);
+procedure TCustomWritableComponent.setFilename(const aValue: string);
 begin
   fFilename := aValue;
 end;
 
-procedure TWritableComponent.readerPropNoFound(Reader: TReader; Instance: TPersistent;
-      var PropName: string; IsPath: boolean; var Handled, Skip: Boolean);
-begin
-  Handled := true;
-  Skip := true;
-end;
-
-procedure TWritableComponent.readerError(Reader: TReader; const Message: string;
-      var Handled: Boolean);
-begin
-  Handled := true;
-  fHasLoaded := false;
-end;
-
-procedure TWritableComponent.saveToFile(const aFilename: string);
+procedure TCustomWritableComponent.saveToFile(const aFilename: string);
 begin
   fHasSaved := true;
   beforeSave;
   try
-    saveCompToTxtFile(self, aFilename);
+    customSaveToFile(aFilename);
   except
     fHasSaved := false;
   end;
@@ -88,15 +106,95 @@ begin
   afterSave;
 end;
 
-procedure TWritableComponent.loadFromFile(const aFilename: string);
+procedure TCustomWritableComponent.loadFromFile(const aFilename: string);
 begin
   fHasLoaded := true;
   beforeLoad;
   setFilename(aFilename);
-  loadCompFromTxtFile(self, aFilename, @readerPropNoFound, @readerError);
+  customLoadFromFile(aFilename);
   afterLoad;
 end;
+{$ENDREGION}
+
+{$REGION TWritableLfmTextComponent ---------------------------------------------}
+procedure TWritableLfmTextComponent.customSaveToFile(const aFilename: string);
+begin
+  saveCompToTxtFile(self, aFilename);
+end;
+
+procedure TWritableLfmTextComponent.customLoadFromFile(const aFilename: string);
+begin
+  loadCompFromTxtFile(self, aFilename, @readerPropNoFound, @readerError);
+end;
+
+procedure TWritableLfmTextComponent.readerPropNoFound(Reader: TReader; Instance: TPersistent;
+      var PropName: string; IsPath: boolean; var Handled, Skip: Boolean);
+begin
+  Handled := true;
+  Skip := true;
+end;
+
+procedure TWritableLfmTextComponent.readerError(Reader: TReader; const Message: string;
+      var Handled: Boolean);
+begin
+  Handled := true;
+  fHasLoaded := false;
+end;
+{$ENDREGION}
+
+{$REGION TWritableJsonComponent ------------------------------------------------}
+procedure TWritableJsonComponent.propertyError(Sender : TObject; AObject : TObject; Info : PPropInfo;
+      AValue : TJSONData; Error : Exception; Var doContinue : Boolean);
+begin
+  doContinue := true;
+end;
+
+procedure TWritableJsonComponent.restoreProperty(Sender : TObject; AObject : TObject; Info : PPropInfo;
+      AValue : TJSONData; Var Handled : Boolean);
+begin
+  Handled := true;
+end;
+
+procedure TWritableJsonComponent.customSaveToFile(const aFilename: string);
+var
+  file_str: TMemoryStream;
+  json_str: TJSONStreamer;
+  json_dat: TJSONStringType;
+begin
+  file_str := TMemoryStream.Create;
+  json_str := TJSONStreamer.Create(nil);
+  try
+    json_dat := json_str.ObjectToJSONString(self);
+    file_str.Write(json_dat[1], length(json_dat));
+    file_str.SaveToFile(aFilename);
+  finally
+    file_str.Free;
+    json_str.Free;
+  end;
+end;
+
+procedure TWritableJsonComponent.customLoadFromFile(const aFilename: string);
+var
+  file_str: TMemoryStream;
+  json_str: TJSONDeStreamer;
+  json_dat: TJSONStringType;
+begin
+  file_str := TMemoryStream.Create;
+  json_str := TJSONDeStreamer.Create(nil);
+  try
+    json_str.OnPropertyError:= @propertyError;
+    json_str.OnRestoreProperty := @restoreProperty;
+    file_str.LoadFromFile(aFilename);
+    setLength(json_dat, file_str.Size);
+    file_str.Read(json_dat[1], length(json_dat));
+    json_str.JSONToObject(json_dat, self);
+  finally
+    file_str.Free;
+    json_str.Free;
+  end;
+end;
+{$ENDREGION}
 
 initialization
-  registerClasses([TWritableComponent]);
+  registerClasses([TCustomWritableComponent, TWritableLfmTextComponent, TWritableJsonComponent]);
 end.