logfilter/UWriter.pas

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unit UWriter;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, UFilter, crt, fgl, htmlelements;
type
TWriter = class
public
procedure WriteContent(AContent: String;
AHighlights: THighlights); virtual; abstract;
end;
TWriterList = specialize TFPGObjectList<TWriter>;
{ TConsoleWriter }
TConsoleWriter = class(TWriter)
public
procedure WriteContent(AContent: String;
AHighlights: THighlights); override;
end;
{ THTMLWriter }
THTMLWriter = class(TWriter)
protected
FFileStream: TFileStream;
procedure WriteLine(AContent: String);
public
constructor Create(AFileName: String);
destructor Destroy; override;
procedure WriteContent(AContent: String;
AHighlights: THighlights); override;
end;
implementation
const
htmlColors: array[0..15] of String[6] = (
'000000', '000066', '003300', '0099CC', '990000', '990033', '663300',
'CCCCCC', '666666', '66CCFF', '66FF66', '99FFCC', 'FF8080', 'FF80B2',
'FFFF00', 'FFFFFF'
);
cssColors: array[0..15] of String = (
'Black', 'Blue', 'Green', 'Cyan', 'Red', 'Magenta', 'Brown', 'LightGray',
'DarkGray', 'LightBlue', 'LightGreen', 'LightCyan', 'LightRed',
'LightMagenta', 'Yellow', 'White'
);
{ THTMLWriter }
procedure THTMLWriter.WriteLine(AContent: String);
begin
AContent := AContent + LineEnding;
FFileStream.Write(AContent[1], Length(AContent));
end;
constructor THTMLWriter.Create(AFileName: String);
begin
FFileStream := TFileStream.Create(AFileName, fmCreate);
WriteLine('<html>');
WriteLine('<body><samp>');
end;
destructor THTMLWriter.Destroy;
begin
WriteLine('</samp></body>');
WriteLine('</html>');
FFileStream.Free;
inherited Destroy;
end;
procedure THTMLWriter.WriteContent(AContent: String; AHighlights: THighlights);
var
matchPos, offset, lastPos: Integer;
highlight: THighlight;
htmlContent, style: String;
begin
lastPos := 1;
htmlContent := '';
for highlight in AHighlights do
begin
matchPos := highlight.Start;
offset := highlight.Length;
htmlContent := htmlContent + EscapeHTML(Copy(AContent, lastPos,
matchPos - lastPos));
style := '';
if highlight.FGColor < 16 then
style := 'color: ' + cssColors[highlight.FGColor] + ';';
if highlight.BGColor < 15 then
style := style + 'background-color: ' + cssColors[highlight.BGColor] + ';';
if style <> '' then
htmlContent := htmlContent + '<span style="' + style + '">';
htmlContent := htmlContent + EscapeHTML(Copy(AContent, matchPos, offset));
if style <> '' then
htmlContent := htmlContent + '</span>';
lastPos := matchPos + offset;
end;
htmlContent := htmlContent + EscapeHTML(Copy(AContent, lastPos, Length(AContent)));
WriteLine(htmlContent + '<br/>');
end;
{ TConsoleWriter }
procedure TConsoleWriter.WriteContent(AContent: String; AHighlights: THighlights
);
var
matchPos, offset, lastPos: Integer;
highlight: THighlight;
begin
lastPos := 1;
for highlight in AHighlights do
begin
matchPos := highlight.Start;
offset := highlight.Length;
write(Copy(AContent, lastPos, matchPos - lastPos));
if highlight.FGColor < $FF then
TextColor(highlight.FGColor);
if highlight.BGColor < $FF then
TextBackground(highlight.BGColor);
write(Copy(AContent, matchPos, offset));
NormVideo;
lastPos := matchPos + offset;
end;
writeln(Copy(AContent, lastPos, Length(AContent)));
end;
end.