dbrv.pas

richview1.7 full.source

{===============================} unit DBRV; {==========================}
{ unit DBRV:                                                            }
{ components:                                                           }
{   TDBRichView,                                                        }
{   TDBRichViewEdit                                                     }
{   (registered in "RichView" palette page)                             }
{-----------------------------------------------------------------------}
{ Copyright (C) S.Tkachenko                                             }
{=======================================================================}

interface
{$I RV_Defs.inc}
uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  RVScroll, RichView, RVEdit, DB, DBCtrls, CRVData
  {$IFNDEF RICHVIEWCBDEF3}
  , DBTables
  {$ENDIF}
  ;
type
  TRVDBFieldFormat = (rvdbRVF, rvdbRTF, rvdbText);


  TDBRichView = class(TCustomRichView)
  private
    { Private declarations }
    FDataLink: TFieldDataLink;
    FAutoDisplay: Boolean;
    FFocused: Boolean;
    FMemoLoaded: Boolean;
    procedure DataChange(Sender: TObject);
    function GetDataField: string;
    function GetDataSource: TDataSource;
    function GetField: TField;
    procedure SetDataField(const Value: string);
    procedure SetDataSource(Value: TDataSource);
    procedure CMGetDataLink(var Message: TMessage); message CM_GETDATALINK;
    procedure SetAutoDisplay(Value: Boolean);
  protected
    { Protected declarations }
    procedure Loaded; override;
    procedure Notification(AComponent: TComponent;
      Operation: TOperation); override;
    procedure DblClick; override;
  public
    { Public declarations }
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure LoadField;
    property Field: TField read GetField;
  published
    { Published declarations: new for TDBRichView }
    property DataField: string read GetDataField write SetDataField;
    property DataSource: TDataSource read GetDataSource write SetDataSource;
    property AutoDisplay: Boolean read FAutoDisplay write SetAutoDisplay default True;
    { Published standard properties }
    property Align;
    {$IFDEF RICHVIEWDEF4}
    property Anchors;
    property Constraints;
    {$ENDIF}
    property Color default clNone;
    property Ctl3D;
    {$IFDEF RICHVIEWDEF4}
    property DragKind;
    {$ENDIF}    
    property DragMode;
    property Enabled;
    property HelpContext;
    property ParentCtl3D;
    property PopupMenu;    
    property ShowHint;
    property TabOrder;
    property TabStop default True;
    property Visible;
    { Published standard events }
    property OnClick;
    {$IFDEF RICHVIEWDEF5}
    property OnContextPopup;
    {$ENDIF}
    property OnDblClick;
    property OnDragDrop;
    property OnDragOver;
    property OnEndDrag;
    property OnEnter;
    property OnExit;
    property OnKeyDown;
    property OnKeyPress;
    property OnKeyUp;
    property OnMouseMove;
    {$IFDEF RICHVIEWDEF4}
    property OnMouseWheel;
    property OnMouseWheelDown;
    property OnMouseWheelUp;
    property OnResize;    
    {$ENDIF}
    property OnStartDrag;
    { Published RichView properties }
    property BackgroundBitmap;
    property BackgroundStyle default bsNoBitmap;
    property BiDiMode;
    property BorderStyle default bsSingle;
    property BottomMargin;
    property CPEventKind default cpeNone;
    property Cursor default crDefault;
    property Delimiters;
    property DoInPaletteMode;
    property FirstJumpNo;
    property HScrollVisible;
    property LeftMargin;
    property MaxTextWidth;
    property MinTextWidth;
    property Options;
    property RightMargin;
    property RTFOptions;
    property RTFReadProperties;
    property RVFOptions;
    property RVFParaStylesReadMode;
    property RVFTextStylesReadMode;
    {$IFDEF RVFLATSCROLLBARS}
    property ScrollBarColor;
    property ScrollBarStyle;
    {$ENDIF}
    property Style;
    property TabNavigation;
    property TopMargin;
    property Tracking;
    property UseXPThemes;
    property VScrollVisible;
    {$IFDEF RICHVIEWDEF4}
    property WheelStep;
    {$ENDIF}
    { Published RichView events }
    property OnCheckpointVisible;
    property OnControlAction;
    property OnCopy;
    {$IFDEF RV_ODHC}
    property OnDocumentHeightChange;
    {$ENDIF}
    property OnItemAction;
    property OnJump;
    property OnHScrolled;    
    property OnHTMLSaveImage;
    property OnPaint;
    property OnReadHyperlink;    
    property OnRVDblClick;
    property OnRVFImageListNeeded;
    property OnRVFControlNeeded;
    property OnRVFPictureNeeded;
    property OnRVMouseDown;
    property OnRVMouseMove;
    property OnRVMouseUp;
    property OnRVRightClick;
    property OnSaveComponentToFile;
    property OnSaveHTMLExtra;
    property OnSaveRTFExtra;    
    property OnSelect;
    property OnURLNeeded;
    property OnVScrolled;
    { obsolete properties }
    property AllowSelection;
    property SingleClick;
  end;
{-----------------------------------------------------------------------}
  TDBRichViewEdit = class(TCustomRichViewEdit)
  private
    { Private declarations }
    FDataLink: TFieldDataLink;
    FAutoDisplay: Boolean;
    FFocused: Boolean;
    FMemoLoaded: Boolean;
    FDataSaveStream: TMemoryStream;
    FFieldFormat: TRVDBFieldFormat;
    FAutoDeleteUnusedStyles: Boolean;
    procedure DataChange(Sender: TObject);
    procedure EditingChange(Sender: TObject);
    function GetDataField: string;
    function GetDataSource: TDataSource;
    function GetField: TField;
    function DBGetReadOnly: Boolean;
    procedure SetDataField(const Value: string);
    procedure SetDataSource(Value: TDataSource);
    procedure SetFocused(Value: Boolean);
    procedure DBSetReadOnly(Value: Boolean);
    procedure SetAutoDisplay(Value: Boolean);
    procedure UpdateData(Sender: TObject);
    procedure CMEnter(var Message: TCMEnter); message CM_ENTER;
    procedure CMExit(var Message: TCMExit); message CM_EXIT;
    procedure CMGetDataLink(var Message: TMessage); message CM_GETDATALINK;
    procedure BeginEditing;
  protected
    { Protected declarations }
    procedure Loaded; override;
    procedure Notification(AComponent: TComponent;
      Operation: TOperation); override;
    procedure DblClick; override;
    procedure KeyPress(var Key: Char); override;    
  public
    procedure DoChange(ClearRedo: Boolean); override;
    function BeforeChange(FromOutside: Boolean): Boolean; override;
    { Public declarations }
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;
    procedure LoadField;
    property Field: TField read GetField;
  published
    { Published declarations: new for TDBRichViewEdit }
    property AutoDeleteUnusedStyles: Boolean read FAutoDeleteUnusedStyles write FAutoDeleteUnusedStyles default False;
    property DataField: string read GetDataField write SetDataField;
    property DataSource: TDataSource read GetDataSource write SetDataSource;
    property ReadOnly: Boolean read DBGetReadOnly write DBSetReadOnly;
    property AutoDisplay: Boolean read FAutoDisplay write SetAutoDisplay default True;
    property FieldFormat: TRVDBFieldFormat read FFieldFormat write FFieldFormat default rvdbRVF;
    { Published declarations: new for TRichViewEdit }
    property EditorOptions;
    property UndoLimit;

    property OnCaretGetOut;
    property OnCaretMove;    
    property OnChange;
    property OnChanging;
    property OnCurParaStyleChanged;
    property OnCurTextStyleChanged;
    property OnParaStyleConversion;
    property OnPaste;
    property OnStyleConversion;
    property TabNavigation;
    { Published standard properties }
    property Align;
    {$IFDEF RICHVIEWDEF4}
    property Anchors;
    property Constraints;
    {$ENDIF}
    property Color default clNone;
    property Ctl3D;
    {$IFDEF RICHVIEWDEF4}
    property DragKind;
    {$ENDIF}    
    property DragMode;
    property Enabled;
    property HelpContext;
    property ParentCtl3D;
    property PopupMenu;    
    property ShowHint;
    property TabOrder;
    property TabStop default True;
    property UseXPThemes;
    property Visible;
    { Published standard events }
    property OnClick;
    {$IFDEF RICHVIEWDEF5}
    property OnContextPopup;
    {$ENDIF}
    property OnDblClick;
    property OnDragDrop;
    property OnDragOver;
    property OnEndDrag;
    property OnEnter;
    property OnExit;
    property OnKeyDown;
    property OnKeyPress;
    property OnKeyUp;
    property OnMouseMove;
    {$IFDEF RICHVIEWDEF4}
    property OnMouseWheel;
    property OnMouseWheelDown;
    property OnMouseWheelUp;
    property OnResize;    
    {$ENDIF}
    property OnStartDrag;
    { Published RichView properties }
    property BackgroundBitmap;
    property BackgroundStyle default bsNoBitmap;
    property BiDiMode;
    property BorderStyle default bsSingle;
    property BottomMargin;
    //property CPEventKind;
    property Cursor default crIBeam;
    property Delimiters;
    property DoInPaletteMode;
    property FirstJumpNo;
    property HScrollVisible;
    property LeftMargin;
    property MaxTextWidth;
    property MinTextWidth;
    property Options;
    property RightMargin;
    property RTFOptions;
    property RTFReadProperties;
    property RVFOptions;
    property RVFParaStylesReadMode;
    property RVFTextStylesReadMode;
    {$IFDEF RVFLATSCROLLBARS}
    property ScrollBarColor;
    property ScrollBarStyle;
    {$ENDIF}
    property Style;
    //property TabNavigation;
    property TopMargin;
    property Tracking;
    property VScrollVisible;
    {$IFDEF RICHVIEWDEF4}
    property WheelStep;
    {$ENDIF}
    { Published RichView events }
    //property OnCheckpointVisible;
    property OnControlAction;
    property OnCopy;
    {$IFDEF RV_ODHC}
    property OnDocumentHeightChange;
    {$ENDIF}
    property OnItemAction;
    property OnJump;
    property OnHScrolled;    
    property OnHTMLSaveImage;
    property OnPaint;    
    property OnReadHyperlink;
    property OnRVDblClick;
    property OnRVFImageListNeeded;
    property OnRVFControlNeeded;
    property OnRVFPictureNeeded;
    property OnRVMouseDown;
    property OnRVMouseMove;
    property OnRVMouseUp;
    property OnRVRightClick;
    property OnSaveComponentToFile;
    property OnSaveHTMLExtra;
    property OnSaveRTFExtra;    
    property OnSelect;
    property OnURLNeeded;
    property OnVScrolled;
    { obsolete properties }
    property AllowSelection;
    property SingleClick;
  end;

procedure Register;

implementation
{$IFNDEF RICHVIEWDEF3}
function CompareMem(P1, P2: Pointer; Length: Integer): Boolean; assembler;
asm
        PUSH    ESI
        PUSH    EDI
        MOV     ESI,P1
        MOV     EDI,P2
        MOV     EDX,ECX
        XOR     EAX,EAX
        AND     EDX,3
        SHR     ECX,2
        REPE    CMPSD
        JNE     @@2
        MOV     ECX,EDX
        REPE    CMPSB
        JNE     @@2
@@1:    INC     EAX
@@2:    POP     EDI
        POP     ESI
end;
{$ENDIF}
{============================DBRichView=================================}
constructor TDBRichView.Create(AOwner: TComponent);
begin
  inherited Create(AOwner);
  FDataLink := TFieldDataLink.Create;
  FDataLink.Control := Self;
  FDataLink.OnDataChange := DataChange;
  FAutoDisplay := True;
end;
{-----------------------------------------------------------------------}
destructor TDBRichView.Destroy;
begin
  FDataLink.Free;
  FDataLink := nil;
  inherited Destroy;
end;
{-----------------------------------------------------------------------}
procedure TDBRichView.Loaded;
begin
  inherited Loaded;
  if (csDesigning in ComponentState) then DataChange(Self);
end;
{-----------------------------------------------------------------------}
procedure TDBRichView.Notification(AComponent: TComponent;
  Operation: TOperation);
begin
  inherited Notification(AComponent, Operation);
  if (Operation = opRemove) and (FDataLink <> nil) and
    (AComponent = DataSource) then DataSource := nil;
end;
{-----------------------------------------------------------------------}
function TDBRichView.GetDataSource: TDataSource;
begin
  Result := FDataLink.DataSource;
end;
{-----------------------------------------------------------------------}
procedure TDBRichView.SetDataSource(Value: TDataSource);
begin
  if not (FDataLink.DataSourceFixed and (csLoading in ComponentState)) then
    FDataLink.DataSource := Value;
  if Value <> nil then Value.FreeNotification(Self);
end;
{-----------------------------------------------------------------------}
function TDBRichView.GetDataField: string;
begin
  Result := FDataLink.FieldName;
end;
{-----------------------------------------------------------------------}
procedure TDBRichView.SetDataField(const Value: string);
begin
  FDataLink.FieldName := Value;
end;
{-----------------------------------------------------------------------}
function TDBRichView.GetField: TField;
begin
  Result := FDataLink.Field;
end;
{-----------------------------------------------------------------------}
procedure TDBRichView.SetAutoDisplay(Value: Boolean);
begin
  if FAutoDisplay <> Value then