257 lines
6.8 KiB
ObjectPascal
257 lines
6.8 KiB
ObjectPascal
{-----------------------------------------------------------------------------
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The contents of this file are subject to the Mozilla Public License
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Version 1.1 (the "License"); you may not use this file except in compliance
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with the License. You may obtain a copy of the License at
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http://www.mozilla.org/MPL/MPL-1.1.html
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Software distributed under the License is distributed on an "AS IS" basis,
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WITHOUT WARRANTY OF ANY KIND, either expressed or implied. See the License for
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the specific language governing rights and limitations under the License.
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The Original Code is: JvgRichEditUtils.PAS, released on 2003-01-15.
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The Initial Developer of the Original Code is Andrey V. Chudin, [chudin att yandex dott ru]
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Portions created by Andrey V. Chudin are Copyright (C) 2003 Andrey V. Chudin.
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All Rights Reserved.
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Contributor(s):
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Michael Beck [mbeck att bigfoot dott com].
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You may retrieve the latest version of this file at the Project JEDI's JVCL home page,
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located at http://jvcl.sourceforge.net
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Description:
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TRichEdit Wrapping functions
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Known Issues:
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-----------------------------------------------------------------------------}
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// $Id: JvgRichEditUtils.pas,v 1.13 2005/02/17 10:21:21 marquardt Exp $
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unit JvgRichEditUtils;
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{$I jvcl.inc}
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interface
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uses
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{$IFDEF USEJVCL}
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{$IFDEF UNITVERSIONING}
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JclUnitVersioning,
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{$ENDIF UNITVERSIONING}
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{$ENDIF USEJVCL}
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Windows, Messages, Graphics, ComCtrls, Classes;
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procedure AddNl(RE: TRichEdit);
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procedure AddText(RE: TRichEdit; const Str: string; TxtSize: Integer;
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TxtStyle: TFontStyles; TxtColor: TColor);
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procedure AddTextNl(RE: TRichEdit; const Str: string; TxtSize: Integer;
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TxtStyle: TFontStyles; TxtColor: TColor);
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procedure DoSyntaxHighlight(Memo: TRichEdit);
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{$IFDEF USEJVCL}
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{$IFDEF UNITVERSIONING}
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const
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UnitVersioning: TUnitVersionInfo = (
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RCSfile: '$RCSfile: JvgRichEditUtils.pas,v $';
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Revision: '$Revision: 1.13 $';
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Date: '$Date: 2005/02/17 10:21:21 $';
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LogPath: 'JVCL\run'
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);
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{$ENDIF UNITVERSIONING}
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{$ENDIF USEJVCL}
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implementation
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procedure AddNl(RE: TRichEdit);
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begin
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RE.Lines.Add('');
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end;
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procedure AddText(RE: TRichEdit; const Str: string; TxtSize: Integer;
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TxtStyle: TFontStyles; TxtColor: TColor);
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var
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Pos1, Pos2: Integer;
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begin
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with RE, RE.Lines do
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begin
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Pos1 := Length(Text);
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if Pos1 = 0 then
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Text := Str
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else
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Lines[Lines.Count - 1] := Lines[Lines.Count - 1] + Str;
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Pos2 := Length(Text);
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SelStart := Pos1 - 2;
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SelLength := Pos2 - Pos1 + 1;
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SelAttributes.Size := TxtSize;
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SelAttributes.Style := TxtStyle;
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SelAttributes.Color := TxtColor;
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end;
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end;
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procedure AddTextNl(RE: TRichEdit; const Str: string; TxtSize: Integer;
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TxtStyle: TFontStyles; TxtColor: TColor);
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begin
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RE.Lines.Add('');
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AddText(RE, Str, TxtSize, TxtStyle, TxtColor);
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end;
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procedure DoSyntaxHighlight(Memo: TRichEdit);
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type
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THData = record
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Word: string;
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Color: TColor;
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Bold: Boolean;
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end;
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TLexemKind = (ltTag, ltComma);
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PLexem = ^TLexem;
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TLexem = record
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StartPos, EndPos: Integer;
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Kind: TLexemKind;
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end;
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TLastLexem = record
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Tag, Comma: TLexem;
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end;
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{ (rom) disabled not used
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const
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cWordsCount = 6;
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cWord: array [1..cWordsCount] of PChar =
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('<html>', '<body>', 'function', 'var', 'script', '<Table');
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cColor: array [1..cWordsCount] of TColor =
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($500000, $500000, $500000, $500000, $000060, $606000);
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cBold: array [1..cWordsCount] of Boolean =
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(False, False, True, True, False, False);
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}
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var
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Pos1: Integer;
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i: Integer;
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doBold: Boolean;
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MemoText: string;
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Lexems: TList;
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LastLexem: TLastLexem;
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PL: PLexem;
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function GetNextLexem(var Pos1, Pos2: Integer; Trimleft: Boolean): string;
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var
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Pos: Integer;
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begin
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Pos := Pos1;
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if MemoText[Pos] = ' ' then
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repeat
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Inc(Pos);
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until (Pos > Length(MemoText)) or (MemoText[Pos] <> ' ');
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Pos2 := Pos;
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if Trimleft then
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Pos1 := Pos;
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repeat
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Inc(Pos2);
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until (Pos2 > Length(MemoText)) or (MemoText[Pos2] = ' ') or
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(MemoText[Pos2] = '''') or (MemoText[Pos2] = '"') or
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(MemoText[Pos2] = Chr($0D));
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Result := Copy(MemoText, Pos1, Pos2 - Pos1);
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end;
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begin
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doBold := False;
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Lexems := TList.Create;
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try
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MemoText := Memo.Text;
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Memo.Lines.BeginUpdate;
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SendMessage(Memo.Handle, WM_SETREDRAW, 0, 0);
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Pos1 := 1;
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Memo.SelStart := 0;
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Memo.SelLength := Length(MemoText);
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Memo.SelAttributes.Color := clBlack;
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Memo.SelAttributes.Style := [];
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LastLexem.Tag.StartPos := -1;
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LastLexem.Comma.StartPos := -1;
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while Pos1 < Length(MemoText) do
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begin
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if (MemoText[Pos1] = '>') and (LastLexem.Tag.StartPos <> -1) then
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begin
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New(PL);
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Lexems.Add(PL);
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PL^.Kind := ltTag;
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PL^.StartPos := LastLexem.Tag.StartPos;
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PL^.EndPos := Pos1;
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LastLexem.Tag.StartPos := -1;
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end
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else
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if ((MemoText[Pos1] = '''') or (MemoText[Pos1] = '"')) and
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(LastLexem.Comma.StartPos <> -1) then
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begin
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New(PL);
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Lexems.Add(PL);
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PL^.Kind := ltComma;
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PL^.StartPos := LastLexem.Comma.StartPos;
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PL^.EndPos := Pos1;
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LastLexem.Comma.StartPos := -1;
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end
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else
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if MemoText[Pos1] = '<' then
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LastLexem.Tag.StartPos := Pos1 - 1
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else
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if (MemoText[Pos1] = '''') or (MemoText[Pos1] = '"') then
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LastLexem.Comma.StartPos := Pos1 - 1;
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Inc(Pos1);
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if (MemoText[Pos1 - 1] = '<') and (MemoText[Pos1] = '#') then
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doBold := True;
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end;
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for i := 0 to Lexems.Count - 1 do
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with PLexem(Lexems[i])^ do
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if Kind = ltTag then
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begin
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Memo.SelStart := StartPos;
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Memo.SelLength := EndPos - StartPos;
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Memo.SelAttributes.Color := clBlue;
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if doBold then
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Memo.SelAttributes.Style := [fsBold]
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else
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Memo.SelAttributes.Style := [];
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end;
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for i := 0 to Lexems.Count - 1 do
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with PLexem(Lexems[i])^ do
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if Kind = ltComma then
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begin
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Memo.SelStart := StartPos;
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Memo.SelLength := EndPos - StartPos;
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Memo.SelAttributes.Color := clTeal;
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end;
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Memo.Lines.EndUpdate;
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SendMessage(Memo.Handle, WM_SETREDRAW, 1, 0);
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RedrawWindow(Memo.Handle, nil, 0, RDW_INVALIDATE or RDW_ALLCHILDREN);
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Memo.SelStart := 0;
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Memo.SelLength := 0;
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finally
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for i := 0 to Lexems.Count - 1 do
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Dispose(Lexems[i]);
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Lexems.Free;
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end;
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end;
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{$IFDEF USEJVCL}
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{$IFDEF UNITVERSIONING}
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initialization
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RegisterUnitVersion(HInstance, UnitVersioning);
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finalization
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UnregisterUnitVersion(HInstance);
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{$ENDIF UNITVERSIONING}
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{$ENDIF USEJVCL}
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end.
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