[yunqa.de] Re: missing the '=' in tag attribute with empty value after deletion another attribute
- From: Кудрявцев Дмитрий <d.v.k@xxxxxxx>
- To: Delphi Inspiration <yunqa@xxxxxxxxxxxxx>
- Date: Thu, 26 Apr 2012 19:01:28 +0700
Title: Re: [yunqa.de] Re: missing the '=' in tag attribute with empty value after deletion another attribute
Thank you very much.
Thursday, April 26, 2012, 6:47:16 PM, you wrote:
DI> On 25.04.2012 05:18, Кудрявцев Дмитрий wrote:
>> I use TDIHtmlParser with TDIHtmlWriterPlugin and found the following
>> strange result when processing tags:
>> if tag has two attributes: first is empty (e.g. title=""), second is
>> not empty (e.g. href=""), then deletion of second attribute
>> causes that 1st (empty) attribute loses the ="" part and become in our
>> example simple "title" (without quotes).
>> May be it is not correct?
DI> Yes, this is correct in HTML terms. An attribute without a value is just
DI> like the attribute with an empty value:
DI> http://www.w3.org/TR/html-markup/syntax.html#syntax-attr-empty
>> The DIHtmlWriterPlugin1.QuoteHtmlTags := qtAlways; does not helps.
DI> You can force to write out empty attribute values by specifying
DI> DIHtmlWriterPlugin1.EmptyHtmlAttribValues := True;
DI> To demonstrate this, I have copied an example project below.
DI> Ralf
DI> {-------------------------------------------------------------------------------
DI> DIHtmlParser project to demonstrate how to force TDIHtmlWriterPlugin
DI> to always write out quoted empty attribute values.
DI> Visit the DIHtmlParser homepage for latest information and updates:
DI> http://www.yunqa.de/delphi/
DI> Copyright (c) 2012 Ralf Junker, The Delphi Inspiration <delphi@xxxxxxxx>
DI> -------------------------------------------------------------------------------}
DI> program WriterPlugin_2;
DI> {$APPTYPE Console}
DI> uses
DI> {$IFDEF FastMM}{$I FastMM_uses.inc}{$ENDIF}
DI> DISystemCompat, DIHtmlMisc, DIHtmlParser, DIHtmlWriterPlugin;
DI> const
DI> HTML: RawByteString = '<a title="" href="">';
DI> var
DI> HP: TDIHtmlParser;
DI> HW: TDIHtmlWriterPlugin;
DI> begin
DI> {$IFDEF FastMM}{$I FastMM_init.inc}{$ENDIF}
DI> HP := TDIHtmlParser.Create(nil);
DI> HW := TDIHtmlWriterPlugin.Create(nil);
DI> try
DI> HW.HtmlParser := HP;
DI> HP.SetAllFilters(fishow);
DI> HP.SourceBufferAsStrA := HTML;
DI> { Always write out quoted empty attribute values. }
DI> HW.EmptyHtmlAttribValues := True;
DI> HW.QuoteHtmlTags := qtAlways;
DI> while HP.ParseNextPiece do
DI> case HP.PieceType of
DI> ptHtmlTag:
DI> begin
DI> if HP.HtmlTag.Count > 1 then
DI> HP.HtmlTag.DeleteAt(1);
DI> HW.WriteCurrentHtmlTag;
DI> end;
DI> end;
DI> WriteLn(HW.Writer.DataToStrA);
DI> finally
DI> HW.Free;
DI> HP.Free;
DI> end;
DI> WriteLn;
DI> WriteLn('Done - Press ENTER to Exit');
DI> ReadLn;
DI> end.
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