116 lines
3.0 KiB
Plaintext
116 lines
3.0 KiB
Plaintext
unit UWriter;
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{$mode objfpc}{$H+}
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interface
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uses
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Classes, SysUtils, UFilter, Math, crt, fgl;
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type
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TWriter = class
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public
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procedure WriteContent(AContent: String; AFilters: TFilterList;
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AGroupRanges: TGroupRanges); virtual; abstract;
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end;
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TWriterList = specialize TFPGObjectList<TWriter>;
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{ TConsoleWriter }
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TConsoleWriter = class(TWriter)
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public
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procedure WriteContent(AContent: String; AFilters: TFilterList;
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AGroupRanges: TGroupRanges); override;
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end;
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implementation
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{ TConsoleWriter }
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procedure TConsoleWriter.WriteContent(AContent: String; AFilters: TFilterList;
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AGroupRanges: TGroupRanges);
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var
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i: Integer;
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matchPos, offset, lastPos: Integer;
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highlights: THighlights;
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highlight: THighlight;
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group: Byte;
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begin
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highlights := THighlights.Create;
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offset := 0;
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lastPos := 1;
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for i := 0 to AFilters.Count - 1 do
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begin
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if AFilters[i].Expression.Exec(AContent) then
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begin
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repeat
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// We need these values anyway.
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matchPos := AFilters[i].Expression.MatchPos[0];
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offset := AFilters[i].Expression.MatchLen[0];
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group := AFilters[i].Group;
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if group < Length(AGroupRanges) then
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begin
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if (matchPos + offset < AGroupRanges[group].StartIdx) or
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(matchPos > AGroupRanges[group].EndIdx) then
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continue; //Pointless; nothing we can do here
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highlight.Start := Max(AGroupRanges[group].StartIdx, matchPos);
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highlight.Length := Min(AGroupRanges[group].EndIdx - highlight.Start,
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highlight.Start + offset - matchPos);
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{$ifdef debugmatches}
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writeln(' Highlight: ', highlight.Start, ', ', highlight.Length);
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writeln(' MatchPos: ', matchPos, ', StartIdx: ', AGroupRanges[group].StartIdx);
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writeln(' Offset: ', offset, ', EndIdx: ', AGroupRanges[group].EndIdx);
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{$endif}
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end else
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begin
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highlight.Start := matchPos;
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highlight.Length := offset;
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end;
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highlight.FGColor := AFilters[i].FGColor;
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highlight.BGColor := AFilters[i].BGColor;
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highlights.Add(highlight);
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until not AFilters[i].Expression.ExecNext;
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end;
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end;
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highlights.Sort(@CompareHighlights);
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// Sanitize highlights
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for i := 0 to highlights.Count - 2 do
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begin
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if (highlights[i].Start + highlights[i].Length) > highlights[i+1].Start then
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begin
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highlight := highlights[i];
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highlight.Length := highlights[i+1].Start - highlights[i].Start;
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highlights[i] := highlight;
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end;
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end;
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for highlight in highlights do
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begin
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matchPos := highlight.Start;
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offset := highlight.Length;
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write(Copy(AContent, lastPos, matchPos - lastPos));
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if highlight.FGColor < $FF then
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TextColor(highlight.FGColor);
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if highlight.BGColor < $FF then
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TextBackground(highlight.BGColor);
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write(Copy(AContent, matchPos, offset));
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NormVideo;
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lastPos := matchPos + offset;
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end;
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writeln(Copy(AContent, lastPos, Length(AContent)));
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highlights.Free;
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end;
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end.
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