{*******************************************************}
{                                                       }
{         Delphi VCL Extensions (RX)                    }
{                                                       }
{         Copyright (c) 1995, 1996 AO ROSNO             }
{         Copyright (c) 1997 Master-Bank                }
{                                                       }
{ Patched by Polaris Software                           }
{*******************************************************}

unit RXProps;

interface

{$I RX.INC}

uses
  SysUtils, Classes, Graphics, Controls, Forms, TypInfo, rxVclUtils;

type

{ TPropInfoList }

  TPropInfoList = class(TObject)
  private
    FList: PPropList;
    FCount: Integer;
    FSize: Integer;
    function Get(Index: Integer): PPropInfo;
  public
    constructor Create(AObject: TObject; Filter: TTypeKinds);
    destructor Destroy; override;
    function Contains(P: PPropInfo): Boolean;
    function Find(const AName: string): PPropInfo;
    procedure Delete(Index: Integer);
    procedure Intersect(List: TPropInfoList);
    property Count: Integer read FCount;
    property Items[Index: Integer]: PPropInfo read Get; default;
  end;

{ TPropsStorage }

  TReadStrEvent = function(const ASection, Item, Default: string): string of object;
  TWriteStrEvent = procedure(const ASection, Item, Value: string) of object;
  TEraseSectEvent = procedure(const ASection: string) of object;

  TPropsStorage = class(TObject)
  private
    FObject: TObject;
    FOwner: TComponent;
    FPrefix: string;
    FSection: string;
    FOnReadString: TReadStrEvent;
    FOnWriteString: TWriteStrEvent;
    FOnEraseSection: TEraseSectEvent;
    function StoreIntegerProperty(PropInfo: PPropInfo): string;
    function StoreCharProperty(PropInfo: PPropInfo): string;
    function StoreEnumProperty(PropInfo: PPropInfo): string;
    function StoreFloatProperty(PropInfo: PPropInfo): string;
    function StoreStringProperty(PropInfo: PPropInfo): string;
    function StoreSetProperty(PropInfo: PPropInfo): string;
    function StoreClassProperty(PropInfo: PPropInfo): string;
    function StoreStringsProperty(PropInfo: PPropInfo): string;
    function StoreComponentProperty(PropInfo: PPropInfo): string;
    function StoreLStringProperty(PropInfo: PPropInfo): string;
    function StoreWCharProperty(PropInfo: PPropInfo): string;
    function StoreVariantProperty(PropInfo: PPropInfo): string;
    procedure LoadLStringProperty(const S: string; PropInfo: PPropInfo);
    procedure LoadWCharProperty(const S: string; PropInfo: PPropInfo);
    procedure LoadVariantProperty(const S: string; PropInfo: PPropInfo);
{$IFDEF RX_D4}
    function StoreInt64Property(PropInfo: PPropInfo): string;
    procedure LoadInt64Property(const S: string; PropInfo: PPropInfo);
{$ENDIF}
    procedure LoadIntegerProperty(const S: string; PropInfo: PPropInfo);
    procedure LoadCharProperty(const S: string; PropInfo: PPropInfo);
    procedure LoadEnumProperty(const S: string; PropInfo: PPropInfo);
    procedure LoadFloatProperty(const S: string; PropInfo: PPropInfo);
    procedure LoadStringProperty(const S: string; PropInfo: PPropInfo);
    procedure LoadSetProperty(const S: string; PropInfo: PPropInfo);
    procedure LoadClassProperty(const S: string; PropInfo: PPropInfo);
    procedure LoadStringsProperty(const S: string; PropInfo: PPropInfo);
    procedure LoadComponentProperty(const S: string; PropInfo: PPropInfo);
    function CreateInfoList(AComponent: TComponent; StoredList: TStrings): TStrings;
    procedure FreeInfoLists(Info: TStrings);
  protected
    function ReadString(const ASection, Item, Default: string): string; virtual;
    procedure WriteString(const ASection, Item, Value: string); virtual;
    procedure EraseSection(const ASection: string); virtual;
    function GetItemName(const APropName: string): string; virtual;
    function CreateStorage: TPropsStorage; virtual;
  public
    procedure StoreAnyProperty(PropInfo: PPropInfo);
    procedure LoadAnyProperty(PropInfo: PPropInfo);
    procedure StoreProperties(PropList: TStrings);
    procedure LoadProperties(PropList: TStrings);
    procedure LoadObjectsProps(AComponent: TComponent; StoredList: TStrings);
    procedure StoreObjectsProps(AComponent: TComponent; StoredList: TStrings);
    property AObject: TObject read FObject write FObject;
    property Prefix: string read FPrefix write FPrefix;
    property Section: string read FSection write FSection;
    property OnReadString: TReadStrEvent read FOnReadString write FOnReadString;
    property OnWriteString: TWriteStrEvent read FOnWriteString write FOnWriteString;
    property OnEraseSection: TEraseSectEvent read FOnEraseSection write FOnEraseSection;
  end;

{ Utility routines }

procedure UpdateStoredList(AComponent: TComponent; AStoredList: TStrings; FromForm: Boolean);
function CreateStoredItem(const CompName, PropName: string): string;
function ParseStoredItem(const Item: string; var CompName, PropName: string): Boolean;

const
  sPropNameDelimiter: string = '_';

implementation

uses
  Windows,
  Consts, rxStrUtils;

const
  sCount = 'Count';
  sItem = 'Item%d';
  sNull = '(null)';

type
  TCardinalSet = set of 0..SizeOf(Cardinal) * 8 - 1;

function GetPropType(PropInfo: PPropInfo): PTypeInfo;
begin
  Result := PropInfo^.PropType{$IFDEF RX_D3}^{$ENDIF};
end;

{ TPropInfoList }

constructor TPropInfoList.Create(AObject: TObject; Filter: TTypeKinds);
begin
  if AObject <> nil then
  begin
    FCount := GetPropList(AObject.ClassInfo, Filter, nil);
    FSize := FCount * SizeOf(Pointer);
    GetMem(FList, FSize);
    GetPropList(AObject.ClassInfo, Filter, FList);
  end
  else
  begin
    FCount := 0;
    FList := nil;
  end;
end;

destructor TPropInfoList.Destroy;
begin
  if FList <> nil then
    FreeMem(FList, FSize);
end;

function TPropInfoList.Contains(P: PPropInfo): Boolean;
var
  I: Integer;
begin
  for I := 0 to FCount - 1 do
    with FList^[I]^ do
      if (PropType = P^.PropType) and (CompareText(string(Name), string(P^.Name)) = 0) then
      begin
        Result := True;
        Exit;
      end;
  Result := False;
end;

function TPropInfoList.Find(const AName: string): PPropInfo;
var
  I: Integer;
begin
  for I := 0 to FCount - 1 do
    with FList^[I]^ do
      if (CompareText(string(Name), AName) = 0) then
      begin
        Result := FList^[I];
        Exit;
      end;
  Result := nil;
end;

procedure TPropInfoList.Delete(Index: Integer);
begin
  Dec(FCount);
  if Index < FCount then Move(FList^[Index + 1], FList^[Index],
    (FCount - Index) * SizeOf(Pointer));
end;

function TPropInfoList.Get(Index: Integer): PPropInfo;
begin
  Result := FList^[Index];
end;

procedure TPropInfoList.Intersect(List: TPropInfoList);
var
  I: Integer;
begin
  for I := FCount - 1 downto 0 do
    if not List.Contains(FList^[I]) then
      Delete(I);
end;

{ Utility routines }

function CreateStoredItem(const CompName, PropName: string): string;
begin
  Result := '';
  if (CompName <> '') and (PropName <> '') then
    Result := CompName + '.' + PropName;
end;

function ParseStoredItem(const Item: string; var CompName, PropName: string): Boolean;
var
  I: Integer;
begin
  Result := False;
  if Length(Item) = 0 then
    Exit;
  I := Pos('.', Item);
  if I > 0 then
  begin
    CompName := Trim(Copy(Item, 1, I - 1));
    PropName := Trim(Copy(Item, I + 1, MaxInt));
    Result := (Length(CompName) > 0) and (Length(PropName) > 0);
  end;
end;

function ReplaceComponentName(const Item, CompName: string): string;
var
  ACompName, APropName: string;
begin
  Result := '';
  if ParseStoredItem(Item, ACompName, APropName) then
    Result := CreateStoredItem(CompName, APropName);
end;

procedure UpdateStoredList(AComponent: TComponent; AStoredList: TStrings; FromForm: Boolean);
var
  I: Integer;
  Component: TComponent;
  CompName, PropName: string;
begin
  if (AStoredList = nil) or (AComponent = nil) then
    Exit;
  for I := AStoredList.Count - 1 downto 0 do
  begin
    if ParseStoredItem(AStoredList[I], CompName, PropName) then
    begin
      if FromForm then
      begin
        Component := AComponent.FindComponent(CompName);
        if Component = nil then
          AStoredList.Delete(I)
        else
          AStoredList.Objects[I] := Component;
      end
      else
      begin
        Component := TComponent(AStoredList.Objects[I]);
        if Component <> nil then
          AStoredList[I] := ReplaceComponentName(AStoredList[I], Component.Name)
        else
          AStoredList.Delete(I);
      end;
    end
    else
      AStoredList.Delete(I);
  end;
end;

function FindGlobalComponent(const Name: string): TComponent;
var
  I: Integer;
begin
  for I := 0 to Screen.FormCount - 1 do
  begin
    Result := Screen.Forms[I];
    if CompareText(Name, Result.Name) = 0 then
      Exit;
  end;
  for I := 0 to Screen.DataModuleCount - 1 do
  begin
    Result := Screen.DataModules[I];
    if CompareText(Name, Result.Name) = 0 then
      Exit;
  end;
  Result := nil;
end;

{ TPropsStorage }

function TPropsStorage.GetItemName(const APropName: string): string;
begin
  Result := Prefix + APropName;
end;

procedure TPropsStorage.LoadAnyProperty(PropInfo: PPropInfo);
var
  S, Def: string;
begin
  try
    if PropInfo <> nil then
    begin
      case PropInfo^.PropType^.Kind of
        tkInteger: Def := StoreIntegerProperty(PropInfo);
        tkChar: Def := StoreCharProperty(PropInfo);
        tkEnumeration: Def := StoreEnumProperty(PropInfo);
        tkFloat: Def := StoreFloatProperty(PropInfo);
        tkWChar: Def := StoreWCharProperty(PropInfo);
        tkLString: Def := StoreLStringProperty(PropInfo);
  {$IFNDEF RX_D3} { - Delphi 2.0, C++Builder 1.0 }
        tkLWString: Def := StoreLStringProperty(PropInfo);
  {$ENDIF}
        tkVariant: Def := StoreVariantProperty(PropInfo);
{$IFDEF RX_D4}
        tkInt64: Def := StoreInt64Property(PropInfo);
{$ENDIF}
        tkString: Def := StoreStringProperty(PropInfo);
        tkWString: Def := StoreStringProperty(PropInfo);
        tkSet: Def := StoreSetProperty(PropInfo);
        tkClass: Def := '';
      else
        Exit;
      end;
      if (Def <> '') or (PropInfo^.PropType^.Kind in [tkString, tkClass])
        or (PropInfo^.PropType^.Kind in [tkLString, tkWString,
          {$IFNDEF RX_D3} tkLWString, {$ENDIF} tkWChar])
      then
        S := Trim(ReadString(Section, GetItemName(string(PropInfo^.Name)), Def))
      else
        S := '';
      case PropInfo^.PropType^.Kind of
        tkInteger: LoadIntegerProperty(S, PropInfo);
        tkChar: LoadCharProperty(S, PropInfo);
        tkEnumeration: LoadEnumProperty(S, PropInfo);
        tkFloat: LoadFloatProperty(S, PropInfo);
        tkWChar: LoadWCharProperty(S, PropInfo);
        tkLString: LoadLStringProperty(S, PropInfo);
  {$IFNDEF RX_D3} { - Delphi 2.0, C++Builder 1.0 }
        tkLWString: LoadLStringProperty(S, PropInfo);
  {$ENDIF}
        tkVariant: LoadVariantProperty(S, PropInfo);
{$IFDEF RX_D4}
        tkInt64: LoadInt64Property(S, PropInfo);
{$ENDIF}
        tkString: LoadStringProperty(S, PropInfo);
        tkWString: LoadStringProperty(S, PropInfo);
        tkSet: LoadSetProperty(S, PropInfo);
        tkClass: LoadClassProperty(S, PropInfo);
      end;
    end;
  except
    { ignore any exception }
  end;
end;

procedure TPropsStorage.StoreAnyProperty(PropInfo: PPropInfo);
var
  S: string;
begin
  if PropInfo <> nil then
  begin
    case PropInfo^.PropType^.Kind of
      tkInteger: S := StoreIntegerProperty(PropInfo);
      tkChar: S := StoreCharProperty(PropInfo);
      tkEnumeration: S := StoreEnumProperty(PropInfo);
      tkFloat: S := StoreFloatProperty(PropInfo);
      tkLString: S := StoreLStringProperty(PropInfo);
  {$IFNDEF RX_D3} { - Delphi 2.0, C++Builder 1.0 }
      tkLWString: S := StoreLStringProperty(PropInfo);
  {$ENDIF}
      tkWChar: S := StoreWCharProperty(PropInfo);
      tkVariant: S := StoreVariantProperty(PropInfo);
{$IFDEF RX_D4}
      tkInt64: S := StoreInt64Property(PropInfo);
{$ENDIF}
      tkString: S := StoreStringProperty(PropInfo);
      tkWString: S := StoreStringProperty(PropInfo);
      tkSet: S := StoreSetProperty(PropInfo);
      tkClass: S := StoreClassProperty(PropInfo);
    else
      Exit;
    end;
    if (S <> '') or (PropInfo^.PropType^.Kind in [tkString,
      tkLString, tkWString, {$IFNDEF RX_D3} tkLWString, {$ENDIF}
      tkWChar]) then
      WriteString(Section, GetItemName(string(PropInfo^.Name)), Trim(S));
  end;
end;

function TPropsStorage.StoreIntegerProperty(PropInfo: PPropInfo): string;
begin
  Result := IntToStr(GetOrdProp(FObject, PropInfo));
end;

function TPropsStorage.StoreCharProperty(PropInfo: PPropInfo): string;
begin
  Result := Char(GetOrdProp(FObject, PropInfo));
end;

function TPropsStorage.StoreEnumProperty(PropInfo: PPropInfo): string;
begin
  Result := GetEnumName(GetPropType(PropInfo), GetOrdProp(FObject, PropInfo));
end;

function TPropsStorage.StoreFloatProperty(PropInfo: PPropInfo): string;
const
  Precisions: array[TFloatType] of Integer = (7, 15, 18, 18, 19);
begin
  Result := ReplaceStr(FloatToStrF(GetFloatProp(FObject, PropInfo), ffGeneral,
    Precisions[GetTypeData(GetPropType(PropInfo))^.FloatType], 0),
    DecimalSeparator, '.');
end;

function TPropsStorage.StoreStringProperty(PropInfo: PPropInfo): string;
begin
  Result := GetStrProp(FObject, PropInfo);
end;

function TPropsStorage.StoreLStringProperty(PropInfo: PPropInfo): string;
begin
  Result := GetStrProp(FObject, PropInfo);
end;

function TPropsStorage.StoreWCharProperty(PropInfo: PPropInfo): string;
begin
  Result := Char(GetOrdProp(FObject, PropInfo));
end;

function TPropsStorage.StoreVariantProperty(PropInfo: PPropInfo): string;
begin
  Result := GetVariantProp(FObject, PropInfo);
end;

{$IFDEF RX_D4}
function TPropsStorage.StoreInt64Property(PropInfo: PPropInfo): string;
begin
  Result := IntToStr(GetInt64Prop(FObject, PropInfo));
end;
{$ENDIF}

function TPropsStorage.StoreSetProperty(PropInfo: PPropInfo): string;
var
  TypeInfo: PTypeInfo;
  W: Cardinal;
  I: Integer;
begin
  Result := '[';
  W := GetOrdProp(FObject, PropInfo);
  TypeInfo := GetTypeData(GetPropType(PropInfo))^.CompType{$IFDEF RX_D3}^{$ENDIF};
  for I := 0 to SizeOf(TCardinalSet) * 8 - 1 do
    if I in TCardinalSet(W) then
    begin
      if Length(Result) <> 1 then
        Result := Result + ',';
      Result := Result + GetEnumName(TypeInfo, I);
    end;
  Result := Result + ']';
end;

function TPropsStorage.StoreStringsProperty(PropInfo: PPropInfo): string;
var
  List: TObject;
  I: Integer;
  SectName: string;
begin
  Result := '';
  List := TObject(GetOrdProp(Self.FObject, PropInfo));
  SectName := Format('%s.%s', [Section, GetItemName(string(PropInfo^.Name))]);
  EraseSection(SectName);
  if (List is TStrings) and (TStrings(List).Count > 0) then
  begin
    WriteString(SectName, sCount, IntToStr(TStrings(List).Count));
    for I := 0 to TStrings(List).Count - 1 do
      WriteString(SectName, Format(sItem, [I]), TStrings(List)[I]);
  end;
end;

function TPropsStorage.StoreComponentProperty(PropInfo: PPropInfo): string;
var
  Comp: TComponent;
  RootName: string;
begin
  Comp := TComponent(GetOrdProp(FObject, PropInfo));
  if Comp <> nil then
  begin
    Result := Comp.Name;
    if (Comp.Owner <> nil) and (Comp.Owner <> FOwner) then
    begin
      RootName := Comp.Owner.Name;
      if RootName = '' then
      begin
        RootName := Comp.Owner.ClassName;
        if (RootName <> '') and (UpCase(RootName[1]) = 'T') then
          Delete(RootName, 1, 1);
      end;
      Result := Format('%s.%s', [RootName, Result]);
    end;
  end
  else
    Result := sNull;
end;

function TPropsStorage.StoreClassProperty(PropInfo: PPropInfo): string;
var
  Saver: TPropsStorage;
  I: Integer;
  Obj: TObject;

  procedure StoreObjectProps(Obj: TObject; const APrefix, ASection: string);
  var
    I: Integer;
    Props: TPropInfoList;
  begin
    with Saver do
    begin
      AObject := Obj;
      Prefix := APrefix;
      Section := ASection;
      FOnWriteString := Self.FOnWriteString;
      FOnEraseSection := Self.FOnEraseSection;
      Props := TPropInfoList.Create(AObject, tkProperties);
      try
        for I := 0 to Props.Count - 1 do
          StoreAnyProperty(Props.Items[I]);
      finally
        Props.Free;
      end;
    end;
  end;

begin
  Result := '';
  Obj := TObject(GetOrdProp(Self.FObject, PropInfo));
  if (Obj <> nil) then
  begin
    if Obj is TStrings then
      StoreStringsProperty(PropInfo)
    else
    if Obj is TCollection then
    begin
      EraseSection(Format('%s.%s', [Section, Prefix + string(PropInfo^.Name)]));
      Saver := CreateStorage;
      try
        WriteString(Section, Format('%s.%s', [Prefix + string(PropInfo^.Name), sCount]),
          IntToStr(TCollection(Obj).Count));
        for I := 0 to TCollection(Obj).Count - 1 do
        begin
          StoreObjectProps(TCollection(Obj).Items[I],
            Format(sItem, [I]) + sPropNameDelimiter,
            Format('%s.%s', [Section, Prefix + string(PropInfo^.Name)]));
        end;
      finally
        Saver.Free;
      end;
    end
    else
    if Obj is TComponent then
    begin
      Result := StoreComponentProperty(PropInfo);
      Exit;
    end;
  end;
  Saver := CreateStorage;
  try
    with Saver do
      StoreObjectProps(Obj, Self.Prefix + string(PropInfo^.Name), Self.Section);
  finally
    Saver.Free;
  end;
end;

procedure TPropsStorage.LoadIntegerProperty(const S: string; PropInfo: PPropInfo);
begin
  SetOrdProp(FObject, PropInfo, StrToIntDef(S, 0));
end;

procedure TPropsStorage.LoadCharProperty(const S: string; PropInfo: PPropInfo);
begin
  SetOrdProp(FObject, PropInfo, Integer(S[1]));
end;

procedure TPropsStorage.LoadEnumProperty(const S: string; PropInfo: PPropInfo);
var
  I: Integer;
  EnumType: PTypeInfo;
begin
  EnumType := GetPropType(PropInfo);
  with GetTypeData(EnumType)^ do
    for I := MinValue to MaxValue do
      if CompareText(GetEnumName(EnumType, I), S) = 0 then
      begin
        SetOrdProp(FObject, PropInfo, I);
        Exit;
      end;
end;

procedure TPropsStorage.LoadFloatProperty(const S: string; PropInfo: PPropInfo);
begin
  SetFloatProp(FObject, PropInfo, StrToFloat(ReplaceStr(S, '.',
    DecimalSeparator)));
end;

{$IFDEF RX_D4}
procedure TPropsStorage.LoadInt64Property(const S: string; PropInfo: PPropInfo);
begin
  SetInt64Prop(FObject, PropInfo, StrToInt64Def(S, 0));
end;
{$ENDIF}

procedure TPropsStorage.LoadLStringProperty(const S: string; PropInfo: PPropInfo);
begin
  SetStrProp(FObject, PropInfo, S);
end;

procedure TPropsStorage.LoadWCharProperty(const S: string; PropInfo: PPropInfo);
begin
  SetOrdProp(FObject, PropInfo, Longint(S[1]));
end;

procedure TPropsStorage.LoadVariantProperty(const S: string; PropInfo: PPropInfo);
begin
  SetVariantProp(FObject, PropInfo, S);
end;

procedure TPropsStorage.LoadStringProperty(const S: string; PropInfo: PPropInfo);
begin
  SetStrProp(FObject, PropInfo, S);
end;

procedure TPropsStorage.LoadSetProperty(const S: string; PropInfo: PPropInfo);
const
  Delims = [' ', ',', '[', ']'];
var
  TypeInfo: PTypeInfo;
  W: Cardinal;
  I, N: Integer;
  Count: Integer;
  EnumName: string;
begin
  W := 0;
  TypeInfo := GetTypeData(GetPropType(PropInfo))^.CompType{$IFDEF RX_D3}^{$ENDIF};
  Count := WordCount(S, Delims);
  for N := 1 to Count do
  begin
    EnumName := ExtractWord(N, S, Delims);
    try
      I := GetEnumValue(TypeInfo, EnumName);
      if I >= 0 then
        Include(TCardinalSet(W), I);
    except
    end;
  end;
  SetOrdProp(FObject, PropInfo, W);
end;

procedure TPropsStorage.LoadStringsProperty(const S: string; PropInfo: PPropInfo);
var
  List: TObject;
  Temp: TStrings;
  I, Cnt: Integer;
  SectName: string;
begin
  List := TObject(GetOrdProp(Self.FObject, PropInfo));
  if (List is TStrings) then
  begin
    SectName := Format('%s.%s', [Section, GetItemName(string(PropInfo^.Name))]);
    Cnt := StrToIntDef(Trim(ReadString(SectName, sCount, '0')), 0);
    if Cnt > 0 then
    begin
      Temp := TStringList.Create;
      try
        for I := 0 to Cnt - 1 do
          Temp.Add(ReadString(SectName, Format(sItem, [I]), ''));
        TStrings(List).Assign(Temp);
      finally
        Temp.Free;
      end;
    end;
  end;
end;

procedure TPropsStorage.LoadComponentProperty(const S: string; PropInfo: PPropInfo);
var
  RootName, Name: string;
  Root: TComponent;
  P: Integer;
begin
  if Trim(S) = '' then
    Exit;
  if CompareText(SNull, Trim(S)) = 0 then
  begin
    SetOrdProp(FObject, PropInfo, Longint(nil));
    Exit;
  end;
  P := Pos('.', S);
  if P > 0 then
  begin
    RootName := Trim(Copy(S, 1, P - 1));
    Name := Trim(Copy(S, P + 1, MaxInt));
  end
  else
  begin
    RootName := '';
    Name := Trim(S);
  end;
  if RootName <> '' then
    Root := FindGlobalComponent(RootName)
  else
    Root := FOwner;
  if (Root <> nil) then
    SetOrdProp(FObject, PropInfo, Longint(Root.FindComponent(Name)));
end;

procedure TPropsStorage.LoadClassProperty(const S: string; PropInfo: PPropInfo);
var
  Loader: TPropsStorage;
  I: Integer;
  Cnt: Integer;
  Recreate: Boolean;
  Obj: TObject;

  procedure LoadObjectProps(Obj: TObject; const APrefix, ASection: string);
  var
    I: Integer;
    Props: TPropInfoList;
  begin
    with Loader do
    begin
      AObject := Obj;
      Prefix := APrefix;
      Section := ASection;
      FOnReadString := Self.FOnReadString;
      Props := TPropInfoList.Create(AObject, tkProperties);
      try
        for I := 0 to Props.Count - 1 do
          LoadAnyProperty(Props.Items[I]);
      finally
        Props.Free;
      end;
    end;
  end;

begin
  Obj := TObject(GetOrdProp(Self.FObject, PropInfo));
  if (Obj <> nil) then
  begin
    if Obj is TStrings then
      LoadStringsProperty(S, PropInfo)
    else
    if Obj is TCollection then
    begin
      Loader := CreateStorage;
      try
        Cnt := TCollection(Obj).Count;
        Cnt := StrToIntDef(ReadString(Section, Format('%s.%s',
          [Prefix + string(PropInfo^.Name), sCount]), IntToStr(Cnt)), Cnt);
        Recreate := TCollection(Obj).Count <> Cnt;
        TCollection(Obj).BeginUpdate;
        try
          if Recreate then
            TCollection(Obj).Clear;
          for I := 0 to Cnt - 1 do
          begin
            if Recreate then
              TCollection(Obj).Add;
            LoadObjectProps(TCollection(Obj).Items[I],
              Format(sItem, [I]) + sPropNameDelimiter,
              Format('%s.%s', [Section, Prefix + string(PropInfo^.Name)]));
          end;
        finally
          TCollection(Obj).EndUpdate;
        end;
      finally
        Loader.Free;
      end;
    end
    else
    if Obj is TComponent then
    begin
      LoadComponentProperty(S, PropInfo);
      Exit;
    end;
  end;
  Loader := CreateStorage;
  try
    LoadObjectProps(Obj, Self.Prefix + string(PropInfo^.Name), Self.Section);
  finally
    Loader.Free;
  end;
end;

procedure TPropsStorage.StoreProperties(PropList: TStrings);
var
  I: Integer;
  Props: TPropInfoList;
begin
  Props := TPropInfoList.Create(AObject, tkProperties);
  try
    for I := 0 to PropList.Count - 1 do
      StoreAnyProperty(Props.Find(PropList[I]));
  finally
    Props.Free;
  end;
end;

procedure TPropsStorage.LoadProperties(PropList: TStrings);
var
  I: Integer;
  Props: TPropInfoList;
begin
  Props := TPropInfoList.Create(AObject, tkProperties);
  try
    for I := 0 to PropList.Count - 1 do
      LoadAnyProperty(Props.Find(PropList[I]));
  finally
    Props.Free;
  end;
end;

function TPropsStorage.CreateInfoList(AComponent: TComponent; StoredList: TStrings): TStrings;
var
  I: Integer;
  Obj: TComponent;
  Props: TPropInfoList;
begin
  UpdateStoredList(AComponent, StoredList, False);
  Result := TStringList.Create;
  try
    TStringList(Result).Sorted := True;
    for I := 0 to StoredList.Count - 1 do
    begin
      Obj := TComponent(StoredList.Objects[I]);
      if Result.IndexOf(Obj.Name) < 0 then
      begin
        Props := TPropInfoList.Create(Obj, tkProperties);
        try
          Result.AddObject(Obj.Name, Props);
        except
          Props.Free;
          raise;
        end;
      end;
    end;
  except
    Result.Free;
    Result := nil;
  end;
end;

procedure TPropsStorage.FreeInfoLists(Info: TStrings);
var
  I: Integer;
begin
  for I := Info.Count - 1 downto 0 do
    Info.Objects[I].Free;
  Info.Free;
end;

procedure TPropsStorage.LoadObjectsProps(AComponent: TComponent; StoredList: TStrings);
var
  Info: TStrings;
  I, Idx: Integer;
  Props: TPropInfoList;
  CompName, PropName: string;
begin
  Info := CreateInfoList(AComponent, StoredList);
  if Info <> nil then
  try
    FOwner := AComponent;
    for I := 0 to StoredList.Count - 1 do
    begin
      if ParseStoredItem(StoredList[I], CompName, PropName) then
      begin
        AObject := StoredList.Objects[I];
        Prefix := TComponent(AObject).Name;
        Idx := Info.IndexOf(Prefix);
        if Idx >= 0 then
        begin
          Prefix := Prefix + sPropNameDelimiter;
          Props := TPropInfoList(Info.Objects[Idx]);
          if Props <> nil then
            LoadAnyProperty(Props.Find(PropName));
        end;
      end;
    end;
  finally
    FOwner := nil;
    FreeInfoLists(Info);
  end;
end;

procedure TPropsStorage.StoreObjectsProps(AComponent: TComponent; StoredList: TStrings);
var
  Info: TStrings;
  I, Idx: Integer;
  Props: TPropInfoList;
  CompName, PropName: string;
begin
  Info := CreateInfoList(AComponent, StoredList);
  if Info <> nil then
  try
    FOwner := AComponent;
    for I := 0 to StoredList.Count - 1 do
    begin
      if ParseStoredItem(StoredList[I], CompName, PropName) then
      begin
        AObject := StoredList.Objects[I];
        Prefix := TComponent(AObject).Name;
        Idx := Info.IndexOf(Prefix);
        if Idx >= 0 then
        begin
          Prefix := Prefix + sPropNameDelimiter;
          Props := TPropInfoList(Info.Objects[Idx]);
          if Props <> nil then
            StoreAnyProperty(Props.Find(PropName));
        end;
      end;
    end;
  finally
    FOwner := nil;
    FreeInfoLists(Info);
  end;
end;

function TPropsStorage.CreateStorage: TPropsStorage;
begin
  Result := TPropsStorage.Create;
end;

function TPropsStorage.ReadString(const ASection, Item, Default: string): string;
begin
  if Assigned(FOnReadString) then
    Result := FOnReadString(ASection, Item, Default)
  else
    Result := '';
end;

procedure TPropsStorage.WriteString(const ASection, Item, Value: string);
begin
  if Assigned(FOnWriteString) then
    FOnWriteString(ASection, Item, Value);
end;

procedure TPropsStorage.EraseSection(const ASection: string);
begin
  if Assigned(FOnEraseSection) then
    FOnEraseSection(ASection);
end;

end.