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