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From: Chris Jones <cjns1989-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: pandoc-discuss <pandoc-discuss-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org>
Subject: Re: image that resizes automatically to screen size in epub
Date: Mon, 26 Oct 2020 12:06:34 -0700 (PDT)	[thread overview]
Message-ID: <220286f4-8dab-4a80-9ad6-4794e15f1961o@googlegroups.com> (raw)
In-Reply-To: <b49a95c6-772c-43ac-9bc5-0011ed206c38o-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org>


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What I see is the following processing of raw HTML when creating an EPUB:

1. Tags of the form:

<p><img src=menus/jpg/01.jpg style="height:100.0%" /></p>

    are processed to some extent insofar as the description of the file is 
added to the resulting content.opf manifest and the image is copied to the 
EPUB/media/ directory

2. <svg></svg> tabs are also partially processed: their presence in a file 
(book chapter) automatically causes pandoc to add "properties=svg" 
qualifier to the file's description in the manifest. On the other hand what 
lives inside the svg wrapper is ignored.

In case s/o runs into the same issue my best effort to workaround this 
difficulty:

1. add <img ... /> raw HTML referencing the images to the md source: causes 
pandoc to add them as 'media-type="image/png" (e.g.) to the manifest and 
copy the png/jpg files to the resulting epub.

2. add dummy <svg></svg> empty entries to all files/chapters that reference 
images so that pandoc marks the output files with the "properties=svg" 
attribute in the conten.opf manifest (stops epubcheck complain)

3. run pandoc

4. unzip the epub and batch edit the files in the EPUB/text/ directory... a 
lengthy but simple regex will replace all the <img /> by <svg></svg> 
wrappers + <images /> and zip the stuff back into place as if nothing 
happened.

Questionable... but easier than patching the code.

Not pandoc-related but for those who have a vested interest in epub's there 
is a lengthy not too technical article called *Image handling in ePubs 
reaches new level of inanity* by one *M. A. Demers* one her site: 
(mademers.com)

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  parent reply	other threads:[~2020-10-26 19:06 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-14 22:15 Chris Jones
     [not found] ` <b49a95c6-772c-43ac-9bc5-0011ed206c38o-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org>
2020-10-06 19:50   ` Chris Jones
2020-10-06 22:15   ` Charles Richer Saint-Faure
     [not found]     ` <a0514cc8-560e-40b2-802e-aed2b58930a8o-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org>
2020-10-07  4:45       ` John MacFarlane
2020-10-26 19:06   ` Chris Jones [this message]
     [not found]     ` <220286f4-8dab-4a80-9ad6-4794e15f1961o-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org>
2020-10-26 21:17       ` John MacFarlane
     [not found]         ` <m27drcoffg.fsf-jF64zX8BO08an7k8zZ43ob9bIa4KchGshsV+eolpW18@public.gmane.org>
2020-10-28 18:31           ` cjns...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
     [not found]             ` <04e6652d-6db6-4090-b2f1-db7acc33edd2n-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org>
2020-10-29  0:09               ` John MacFarlane
     [not found]                 ` <m25z6tuc4a.fsf-jF64zX8BO08an7k8zZ43ob9bIa4KchGshsV+eolpW18@public.gmane.org>
2020-10-29  0:21                   ` John MacFarlane
     [not found]                     ` <m2zh45swys.fsf-jF64zX8BO08an7k8zZ43ob9bIa4KchGshsV+eolpW18@public.gmane.org>
2020-10-31 20:34                       ` cjns...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
     [not found]                         ` <20201031203402.gutswizwu477rh3y-611mE6nXTcHDOqzlkpFKJg@public.gmane.org>
2020-10-31 22:59                           ` John MacFarlane
  -- strict thread matches above, loose matches on Subject: below --
2020-06-12 20:00 Chris Jones

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