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Invisible paragraph
https://forum.pdfsharp.net/viewtopic.php?f=2&t=3640		 Page 1 of 1
Author:  MariusIonut [ Mon Aug 14, 2017 6:08 am ]
Post subject:  Invisible paragraph
It is possible to add an invisible text in the page without modifying the layout of the rest of the items.

Reason: I use hidden text as bookmark in XPS document to pin point the document viewer to the exact location of a paragraph, table, image and I need to make something hidden, adding a paragraph and modifying the style or any other option to 0 still creates a small gap between the items.
Author:  Thomas Hoevel [ Mon Aug 14, 2017 7:43 am ]
Post subject:  Re: Invisible paragraph
Using a font size of e.g. 0.001 with white text color (assuming pages are white) or 100% transparency will make the text virtually invisible.

It's a hack, but I get "invisible" bookmarks this way.

I do not fully understand what you need. Maybe an empty paragraph can be used to get a clean solution. You can use the Tag property of the paragraph to identify it.
Author:  MariusIonut [ Mon Aug 14, 2017 11:16 am ]
Post subject:  Re: Invisible paragraph
I have being doing that but adding a paragraph with an invisible text (font size =0.01 and white font color) will still reserve in the final document a few millimeters.

It is for a project where i have a document structure made in a tree view something like:
chapter
-chapter
--paragraph
--paragraph
-chapter
....
And whenever I click one of the items from the treeview I want the document viewer to move to the corresponding document component in the viewer.
And one way of doing, as far I could think of, is to search in the generated XPS document the hacky bookmark that I made with invisible text but doing those kind of invisible paragraphs alters the layout of other component by few millimeters.
Author:  Thomas Hoevel [ Mon Aug 14, 2017 1:42 pm ]
Post subject:  Re: Invisible paragraph
MariusIonut wrote:
I have being doing that but adding a paragraph with an invisible text (font size =0.01 and white font color) will still reserve in the final document a few millimeters.
Not when you do it the right way. You can (and should) set the absolute height of the paragraph.
Code:
paragraph.Format.LineSpacingRule = LineSpacingRule.Exactly;
paragraph.Format.LineSpacing = 0.001;
You may have to set SpaceBefore and SpaceAfter to 0.
Author:  MariusIonut [ Tue Aug 22, 2017 7:34 am ]
Post subject:  Re: Invisible paragraph
Hello Thomas,
Sorry for late response, I was on a small vacation. Even with your latest suggestion it is still somehow reserving space.
Here are the DDLs:
Wanted layout: (No hidden paragraphs)
Code:
\document
{
  \styles
  {
    Normal
    {
      Font
      {
        Name = "Times New Roman"
      }
      ParagraphFormat
      {
        LeftIndent = "0mm"
        FirstLineIndent = "0mm"
        RightIndent = "0mm"
        SpaceBefore = "4mm"
        SpaceAfter = "4mm"
        LineSpacing = "0mm"
      }
    }

    HiddenBookmark : Normal
    {
      Font
      {
        Size = 0.01
      }
      ParagraphFormat
      {
        SpaceBefore = "0mm"
        SpaceAfter = "0mm"
        LineSpacingRule = Exactly
        LineSpacing = "0.001mm"
        KeepTogether = false
        KeepWithNext = false
      }
    }

    Paragraph : Normal
    {
    }
  }
  \section
  [
    PageSetup
    {
      PageHeight = 842
      PageWidth = 595
      Orientation = Portrait
      LeftMargin = "20mm"
      RightMargin = "16mm"
      TopMargin = "15mm"
      BottomMargin = "20mm"
      FooterDistance = "10mm"
      HeaderDistance = "8mm"
      OddAndEvenPagesHeaderFooter = false
      DifferentFirstPageHeaderFooter = false
      SectionStart = BreakNextPage
      PageFormat = A4
      MirrorMargins = false
      HorizontalPageBreak = false
    }
  ]
  {
    \paragraph
    [
      Style = "Paragraph"
      Format
      {
        LeftIndent = 0
        RightIndent = 0
      }
    ]
    {
      \font("Normal"){asdasd}
    }
    \paragraph
    [
      Style = "Paragraph"
      Format
      {
        LeftIndent = 0
        RightIndent = 0
      }
    ]
    {
      \font("Normal"){asdasda}
    }
  }
}

Actual layout:(with hidden paragraph)
Code:
\document
{
  \styles
  {
    Normal
    {
      Font
      {
        Name = "Times New Roman"
      }
      ParagraphFormat
      {
        LeftIndent = "0mm"
        FirstLineIndent = "0mm"
        RightIndent = "0mm"
        SpaceBefore = "4mm"
        SpaceAfter = "4mm"
        LineSpacing = "0mm"
      }
    }

    HiddenBookmark : Normal
    {
      Font
      {
        Size = 0.01
      }
      ParagraphFormat
      {
        SpaceBefore = "0mm"
        SpaceAfter = "0mm"
        LineSpacingRule = Exactly
        LineSpacing = "0.001mm"
        KeepTogether = false
        KeepWithNext = false
      }
    }

    Paragraph : Normal
    {
    }
  }
  \section
  [
    PageSetup
    {
      PageHeight = 842
      PageWidth = 595
      Orientation = Portrait
      LeftMargin = "20mm"
      RightMargin = "16mm"
      TopMargin = "15mm"
      BottomMargin = "20mm"
      FooterDistance = "10mm"
      HeaderDistance = "8mm"
      OddAndEvenPagesHeaderFooter = false
      DifferentFirstPageHeaderFooter = false
      SectionStart = BreakNextPage
      PageFormat = A4
      MirrorMargins = false
      HorizontalPageBreak = false
    }
  ]
  {
    \paragraph
    [
      Style = "HiddenBookmark"
    ]
    {
      | →ParagraphCommandxELEMENTxUNIQUExIDx1 |
    }
    \paragraph
    [
      Style = "Paragraph"
      Format
      {
        LeftIndent = 0
        RightIndent = 0
      }
    ]
    {
      \font("Normal"){asdasd}
    }
    \paragraph
    [
      Style = "HiddenBookmark"
    ]
    {
      | →ParagraphCommandxELEMENTxUNIQUExIDx2 |
    }
    \paragraph
    [
      Style = "Paragraph"
      Format
      {
        LeftIndent = 0
        RightIndent = 0
      }
    ]
    {
      \font("Normal"){asdasds}
    }
  }
}


Changing the space before and space after for style Paragraph to 0 creates the correct layout, but when any other value is used (in my case is inherited from NORMAL style) then the space after and before doubles.
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