110 lines
2.8 KiB
Plaintext
110 lines
2.8 KiB
Plaintext
{
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This file is part of restemplate.
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Copyright (C) 2015 Andreas Schneider
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restemplate is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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restemplate is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with restemplate. If not, see <http://www.gnu.org/licenses/>.
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}
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unit UFilter;
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{$mode objfpc}{$H+}
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{$modeswitch advancedrecords}
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interface
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uses
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Classes, SysUtils, RegExpr, fgl;
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type
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{ THighlightFilter }
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THighlightFilter = class
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Expression: TRegExpr;
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FGColor: Byte;
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BGColor: Byte;
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constructor Create(AString: String);
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destructor Destroy; override;
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class var
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FilterExpression: TRegExpr;
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ParamExpression: TRegExpr;
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end;
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TFilterList = specialize TFPGObjectList<THighlightFilter>;
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{ THighlight }
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THighlight = record
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FGColor: Byte;
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BGColor: Byte;
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Start: Integer;
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Length: Integer;
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class operator =(A, B: THighlight): Boolean;
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end;
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THighlights = specialize TFPGList<THighlight>;
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function CompareHighlights(const AHL1: THighlight; const AHL2: THighlight): Integer;
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implementation
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{ THighlightFilter }
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constructor THighlightFilter.Create(AString: String);
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begin
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FGColor := $FF;
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BGColor := $FF;
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if FilterExpression.Exec(AString) then
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begin
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Expression := TRegExpr.Create(Copy(AString, 1, FilterExpression.MatchPos[0] - 1));
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if ParamExpression.Exec(FilterExpression.Match[0]) then
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repeat
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if ParamExpression.Match[1] = 'FG' then
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FGColor := StrToInt(ParamExpression.Match[2])
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else if ParamExpression.Match[1] = 'BG' then
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BGColor := StrToInt(ParamExpression.Match[2]);
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until not ParamExpression.ExecNext;
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end else
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Expression := TRegExpr.Create(AString);
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end;
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destructor THighlightFilter.Destroy;
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begin
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Expression.Free;
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inherited Destroy;
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end;
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{ THighlight }
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class operator THighlight. = (A, B: THighlight): Boolean;
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begin
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Result := (A.Start = B.Start) and (A.Length = B.Length);
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end;
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function CompareHighlights(const AHL1: THighlight; const AHL2: THighlight): Integer;
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begin
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if AHL1.Start = AHL2.Start then
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begin
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Result := AHL1.Length - AHL2.Length;
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end else
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Result := AHL1.Start - AHL2.Start;
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end;
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initialization
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THighlightFilter.FilterExpression := TRegExpr.Create('( (FG|BG)(\d+))*$');
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THighlightFilter.ParamExpression := TRegExpr.Create('(FG|BG)(\d+)');
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finalization
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THighlightFilter.FilterExpression.Free;
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THighlightFilter.ParamExpression.Free;
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end.
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