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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/
Software distributed under the License is distributed on an "AS IS" basis,
WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
the specific language governing rights and limitations under the License.
Alternatively, the contents of this file may be used under the terms of the
GNU General Public License Version 2 or later (the "GPL"), in which case
the provisions of the GPL are applicable instead of those above.
If you wish to allow use of your version of this file only under the terms
of the GPL and not to allow others to use your version of this file
under the MPL, indicate your decision by deleting the provisions above and
replace them with the notice and other provisions required by the GPL.
If you do not delete the provisions above, a recipient may use your version
of this file under either the MPL or the GPL.
-------------------------------------------------------------------------------}
unit SynEditMarkupSpecialChar;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, Graphics, Controls, LCLProc,
SynEditMarkup, SynEditTypes, SynEditMiscClasses;
type
{ TSynEditMarkupSpecialChar }
TSynEditMarkupSpecialChar = class(TSynEditMarkup)
private
FVisibleSpecialChars: TSynVisibleSpecialChars;
FHasMarkup: Boolean;
FCurLine: String;
FCurStart, FCurEnd: integer;
procedure SetVisibleSpecialChars(AValue: TSynVisibleSpecialChars);
protected
procedure DoMarkupChanged(AMarkup: TSynSelectedColor); override;
procedure DoEnabledChanged(Sender: TObject); override;
function IsSpecial(pos: Integer): Boolean; inline;
public
constructor Create(ASynEdit : TSynEditBase);
destructor Destroy; override;
Procedure PrepareMarkupForRow(aRow : Integer); override;
function GetMarkupAttributeAtRowCol(const aRow: Integer;
const aStartCol: TLazSynDisplayTokenBound;
const AnRtlInfo: TLazSynDisplayRtlInfo): TSynSelectedColor; override;
procedure GetNextMarkupColAfterRowCol(const aRow: Integer;
const aStartCol: TLazSynDisplayTokenBound;
const AnRtlInfo: TLazSynDisplayRtlInfo;
out ANextPhys, ANextLog: Integer); override;
property VisibleSpecialChars: TSynVisibleSpecialChars read FVisibleSpecialChars write SetVisibleSpecialChars;
end;
implementation
{ TSynEditMarkupSpecialChar }
procedure TSynEditMarkupSpecialChar.SetVisibleSpecialChars(AValue: TSynVisibleSpecialChars);
begin
if FVisibleSpecialChars = AValue then Exit;
FVisibleSpecialChars := AValue;
SynEdit.Invalidate;
end;
procedure TSynEditMarkupSpecialChar.DoMarkupChanged(AMarkup: TSynSelectedColor);
begin
inherited DoMarkupChanged(AMarkup);
FHasMarkup := RealEnabled;
SynEdit.Invalidate;
end;
procedure TSynEditMarkupSpecialChar.DoEnabledChanged(Sender: TObject);
begin
FHasMarkup := RealEnabled;
SynEdit.Invalidate;
end;
function TSynEditMarkupSpecialChar.IsSpecial(pos: Integer): Boolean;
begin
if (pos < 1) or (pos > Length(FCurLine)) then exit(False);
Result := ( (vscSpace in FVisibleSpecialChars) and (FCurLine[pos] in [' ']) ) or
( (FVisibleSpecialChars*[vscTabAtFirst, vscTabAtLast] <> []) and (FCurLine[pos] in [#9]) )
;
end;
constructor TSynEditMarkupSpecialChar.Create(ASynEdit : TSynEditBase);
begin
inherited Create(ASynEdit);
MarkupInfo.Clear;
FHasMarkup := False;
end;
destructor TSynEditMarkupSpecialChar.Destroy;
begin
inherited Destroy;
end;
procedure TSynEditMarkupSpecialChar.PrepareMarkupForRow(aRow : Integer);
begin
FCurLine := '';
FCurStart := -1;
FCurEnd := -1;
if (not FHasMarkup) or (FVisibleSpecialChars = []) then exit;
FCurLine := Lines[aRow-1];
end;
function TSynEditMarkupSpecialChar.GetMarkupAttributeAtRowCol(const aRow: Integer;
const aStartCol: TLazSynDisplayTokenBound; const AnRtlInfo: TLazSynDisplayRtlInfo): TSynSelectedColor;
begin
Result := nil;
if (FCurLine='') or (not (FHasMarkup and (FVisibleSpecialChars <> []))) then exit;
if (aStartCol.Logical >= FCurStart) and (aStartCol.Logical < FCurEnd) then begin
Result := MarkupInfo;
MarkupInfo.SetFrameBoundsLog(FCurStart, FCurEnd);
end;
end;
procedure TSynEditMarkupSpecialChar.GetNextMarkupColAfterRowCol(const aRow: Integer;
const aStartCol: TLazSynDisplayTokenBound; const AnRtlInfo: TLazSynDisplayRtlInfo; out ANextPhys,
ANextLog: Integer);
var
s: Boolean;
i, LogCol: Integer;
begin
ANextLog := -1;
ANextPhys := -1;
if (FCurLine='') or (not (FHasMarkup and (FVisibleSpecialChars <> []))) then exit;
if aStartCol.Logical < FCurStart then begin
ANextLog := FCurStart;
exit;
end;
if aStartCol.Logical < FCurEnd then begin
ANextLog := FCurEnd;
exit;
end;
LogCol := aStartCol.Logical;
if LogCol > Length(FCurLine) then exit;
if (LogCol = Length(FCurLine)) then begin
if IsSpecial(LogCol) then begin
ANextLog := Length(FCurLine)+1;
FCurEnd := ANextLog;
end;
exit;
end;
// search next space-seq
i := LogCol;
s := IsSpecial(LogCol);
if s then
FCurStart := aStartCol.Logical
else begin
while (i <= Length(FCurLine)) and (not IsSpecial(i)) do inc(i);
FCurStart := i;
end;
while (i <= Length(FCurLine)) and (IsSpecial(i)) do inc(i);
FCurEnd := i;
if aStartCol.Logical < FCurStart then begin
ANextLog := FCurStart;
exit;
end;
if aStartCol.Logical < FCurEnd then begin
ANextLog := FCurEnd;
exit;
end;
end;
end.
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