[xep-support] Incorrect page margins when writing-mode="rl-tb"

[Bob Stayton]

Hi Ben,
Actually, I think that note in Section 6.4.13 reinforces my point rather than contradicts it.  Perhaps my example was confusing because I switched two things.  I switched both the writing mode and the margins.  If I had switched just writing mode the effect would be more obvious.

The problem in XEP is that when writing-mode="rl-tb", then "margin-left" incorrectly appears on the right side of the page.  My reading of the spec in both sections is that "left" means "left", and is not dependent on the writing mode.  It is the "start" properties mean "left" or "right" depending on the writing-mode.

Bob Stayton
Sagehill Enterprises
bobs at sagehill.net


  ----- Original Message ----- 
  From: ben.m.wynn at rrd.com 
  To: xep-support at renderx.com 
  Sent: Tuesday, April 21, 2009 6:25 AM
  Subject: Re: [xep-support] Incorrect page margins when writing-mode="rl-tb"



  Hi Bob, 

  I've looked over Section 5.3 of the spec, but Section 6.4.13 seems to trump it...  it says that such mappings don't apply to the simple-page-master. 

  Specificly: 
  http://www.w3.org/TR/xsl/ 
  Section 6.4.13: simple-page-master 

  """ 
  Note: 
  The reference points for the page-viewport-area content-rectangle are in terms of the "top", "bottom", "left", and "right" rather than "before-edge", "after-edge", "start-edge", and "end-edge" because users see the media relative to its orientation and not relative to the writing-mode currently in use. 

  """ 
  (bolding is from the spec, not mine) 

  -Ben Wynn 


  owner-xep-support at renderx.com wrote on 04/20/2009 06:25:09 PM:

  > Hi,
  > I don't think there was a response to this bug report.  Is this something 
  > that will be addressed?
  > 
  > Bob Stayton
  > Sagehill Enterprises
  > bobs at sagehill.net
  > 
  > 
  > ----- Original Message ----- 
  > From: "Bob Stayton" <bobs at sagehill.net>
  > To: <xep-support at renderx.com>
  > Sent: Friday, March 06, 2009 2:43 AM
  > Subject: [xep-support] Incorrect page margins when writing-mode="rl-tb"
  > 
  > 
  > >I believe I have found a bug in XEP's interpretation of margin-left and
  > > margin-right on an fo:simple-page-master when the writing-mode="rl-tb".
  > >
  > > I attach two FO files that illustrate the problem:
  > >
  > > test-lr.fo  is an FO file with writing-mode="lr-tb" on the fo:root 
  > > element,
  > > and margin-left="1.5in" margin-right="0.5in" on the fo:simple-page-master
  > > with master-name="body-first"
  > >
  > > test-rl.fo is an FO file with writing-mode="rl-tb" on the fo:root element,
  > > and margin-left="0.5in" margin-right="1.5in" on the fo:simple-page-master
  > > with master-name="body-first"
  > >
  > > Note that the values of the left and right margins are swapped between the
  > > two files.
  > >
  > > I also attach the PDF outputs:
  > >
  > > xep-lr.pdf  shows the first page with a left margin of 1.5in and writing
  > > mode left-to-right
  > >
  > > xep-rl.pdf  shows the first page with a left margin of 1.5in and writing
  > > mode right-to-left
  > >
  > > Note that the margins are not swapped in the PDF outputs.
  > > I believe xep-rl.pdf should have a left margin of 0.5in, not 1.5in.  The
  > > XSL-FO spec section 5.3 says that when writing-mode is rl-tb then left 
  > > maps
  > > to end and right maps to start.  That is not the case in the PDF files I
  > > have attached.
  > >
  > > Is this a known problem?
  > >
  > > Bob Stayton
  > > Sagehill Enterprises
  > > bobs at sagehill.net
  > >
  > > 
  > 
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