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Hello,
We want to announce two new extensions for Python Markdown. They are our
first extensions (maybe some things can be done better)

- markdown-blockdiag: extension for block diagram expressions:
http://blockdiag.com/en/blockdiag/index.html
- markdown-i18n: basic support to translate Markdown files

Feel free to comment improvements or whatever. (pull requests are very
welcome)

Cheers,

--
Eduard Carreras i Nadal

Thomas,

The fenced_code_block extension uses a preprocessor to parse fenced code 
blocks, which stashes the blocks for later retrieval. They are then 
reinserted into the rendered HTML by a postprocessor. As you are only 
running the blockprocessors, none of the pieces of the extension 
actually ever are run. The only way to use the included fenced code 
block extension is to render to HTML. Then run the output through an 
HTML parser and iterate over that. Of course, it is then imposable to 
tell whether the code block started as a indented block or fenced block.

We do have plans to improve things as outlined in 
https://github.com/waylan/Python-Markdown/issues/53 but I can't say when 
that will happen. Its not particularly high on my priority list as the 
current solution is "good enough" for my needs.

I suppose you could iterate over the stashed blocks. But you would need 
to at least run the preprocessor first. The main concern here is that 
the stash is just the `HtmlStash` instance for raw HTML. There is no 
differentiation between the code blocks and other raw HTML. You might 
need to disable raw HTML parsing (another preprocessor). Although, you 
might be able to just run `FencedCodeExtension.run` directly. Just make 
sure you do whitespace normalization first.

I hope that helps. Let me know if you get stuck on anything and I'll see 
if I can help.

Waylan Limberg

On 12/30/2016 02:18 AM, Thomas Baruchel wrote:
> Hi, I would like to iterate over code-blocks of a Markdown document without
> rendering it to anything. I can do it easely with Python-Markdown, but I can't
> manage to add the fenced block extension. My code is:
>
>
>       import markdown
>       from markdown.extensions.fenced_code import FencedCodeExtension
>       M = markdown.Markdown()
>       FencedCodeExtension().extendMarkdown(M, markdown.__dict__)
>
>       f = open("demo.md", "r")
>       tree = M.parser.parseDocument(f.readlines())
>       f.close()
>       for k in tree.iter():
>           if k.tag == "code":
>               print(k)
>               print(k.text)
>
> It still detects indented code-blocks but not the fenced blocks.
> What am I doing wrong?
>
> Thank you by advance,
>
>     regards,
>

Hi, I would like to iterate over code-blocks of a Markdown document without
rendering it to anything. I can do it easely with Python-Markdown, but I can't
manage to add the fenced block extension. My code is:


     import markdown
     from markdown.extensions.fenced_code import FencedCodeExtension
     M = markdown.Markdown()
     FencedCodeExtension().extendMarkdown(M, markdown.__dict__)

     f = open("demo.md", "r")
     tree = M.parser.parseDocument(f.readlines())
     f.close()
     for k in tree.iter():
         if k.tag == "code":
             print(k)
             print(k.text)

It still detects indented code-blocks but not the fenced blocks.
What am I doing wrong?

Thank you by advance,

   regards,

-- 
tb.

Thanks for the response, I bet my problem is the blank lines. I will let
you know if I still have a problem after that fix.

Peace,
Andrew

On Thu, Sep 1, 2016 at 4:57 PM, Waylan Limberg <way...@ic...>
wrote:

> Andrew,
>
> Sorry for the delayed response. I just found your email in a backlog of
> messages in my inbox.
>
> When you stash something, a placeholder gets inserted into the document.
> That placeholder will then get wrapped in `<p>` tags by the Markdown
> parser, which results in the behavior you have encountered. To compensate
> for this, when swapping out the placeholder for the stash in a
> postprocessor, we check if the placeholder is in a paragraph all by itself,
> and if the stash starts with a block level HTML element, we replace the
> placeholder and the wrapping `p` tag. However, if the `p` tag contains more
> that only a placeholder, or the stashed item does not start with a block
> level HTML tag, we simple replace the placeholder inside the paragraph,
> leaving the `p` tags in place (which is how inline raw HTML is handled).
> You can see the code at https://github.com/waylan/
> Python-Markdown/blob/master/markdown/postprocessors.py#L64
> <https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_waylan_Python-2DMarkdown_blob_master_markdown_postprocessors.py-23L64&d=CwMC-g&c=54IZrppPQZKX9mLzcGdPfFD1hxrcB__aEkJFOKJFd00&r=h7heP8xwI1i_HikChvhFbEBurKirgfOCdwgBxB9lM8c&m=xH34QE8Z7L4jtmH635y9_Hcvm4A8tV88mREFKGfWafk&s=7lzmd8__OWp_00c1fQbhFVkPzWSojsbg6sVBu0om3TU&e=>
> .
>
> `section` tags are considered block level, so if you are not seeing that
> behavior, then make sure that there is no whitespace surrounding your tags
> (in the stash) and that no whitespace or anything else is included with
> your placeholder on a line by itself. Your placeholder should have a blank
> line both before and after.
>
> Waylan Limberg
>
> On 08/24/2016 12:32 PM, Slaughter, Andrew E wrote:
>
> I am attempting to stash an opening and closing html tag "<section>" and
> "</section>" in certain parts of my markdown in a Preprocessor, which is
> working. However, it seems to wrap the injected html within a "<p>" block.
> Is there a way to avoid this?
>
> Thanks,
> Andrew
>
>
> ------------------------------------------------------------------------------
>
>
>
> _______________________________________________
> Python-markdown-discuss mailing lis...@li...https://lists.sourceforge.net/lists/listinfo/python-markdown-discuss <https://urldefense.proofpoint.com/v2/url?u=https-3A__lists.sourceforge.net_lists_listinfo_python-2Dmarkdown-2Ddiscuss&d=CwMC-g&c=54IZrppPQZKX9mLzcGdPfFD1hxrcB__aEkJFOKJFd00&r=h7heP8xwI1i_HikChvhFbEBurKirgfOCdwgBxB9lM8c&m=xH34QE8Z7L4jtmH635y9_Hcvm4A8tV88mREFKGfWafk&s=sEQc-PADRs56AFpNIF9wkJqQudsn5myE9IrzFoXInWk&e=>
>
>
>

Andrew,

Sorry for the delayed response. I just found your email in a backlog of 
messages in my inbox.

When you stash something, a placeholder gets inserted into the document. 
That placeholder will then get wrapped in `<p>` tags by the Markdown 
parser, which results in the behavior you have encountered. To 
compensate for this, when swapping out the placeholder for the stash in 
a postprocessor, we check if the placeholder is in a paragraph all by 
itself, and if the stash starts with a block level HTML element, we 
replace the placeholder and the wrapping `p` tag. However, if the `p` 
tag contains more that only a placeholder, or the stashed item does not 
start with a block level HTML tag, we simple replace the placeholder 
inside the paragraph, leaving the `p` tags in place (which is how inline 
raw HTML is handled). You can see the code at 
https://github.com/waylan/Python-Markdown/blob/master/markdown/postprocessors.py#L64.

`section` tags are considered block level, so if you are not seeing that 
behavior, then make sure that there is no whitespace surrounding your 
tags (in the stash) and that no whitespace or anything else is included 
with your placeholder on a line by itself. Your placeholder should have 
a blank line both before and after.

Waylan Limberg

On 08/24/2016 12:32 PM, Slaughter, Andrew E wrote:
> I am attempting to stash an opening and closing html tag "<section>" 
> and "</section>" in certain parts of my markdown in a Preprocessor, 
> which is working. However, it seems to wrap the injected html within a 
> "<p>" block. Is there a way to avoid this?
>
> Thanks,
> Andrew
>
>
> ------------------------------------------------------------------------------
>
>
> _______________________________________________
> Python-markdown-discuss mailing list
> Pyt...@li...
> https://lists.sourceforge.net/lists/listinfo/python-markdown-discuss

I am attempting to stash an opening and closing html tag "<section>" and
"</section>" in certain parts of my markdown in a Preprocessor, which is
working. However, it seems to wrap the injected html within a "<p>" block.
Is there a way to avoid this?

Thanks,
Andrew

Andrew,

Have you looked at the list of existing third party extensions [1]? The outline [2] extension may be of interest to you. It breaks up a Markdown document into sections based on the headers within the document. No need for any special syntax to mark the sections.

However, if you really need the special syntax, that extension might give you some ideas of how to implement your own. If not, then may I suggest you start with a treeprocessor. Step through the already parsed document (ElementTree Elements) and find each paragraph which contains a section marker. Replace that paragraph with a section Element and then insert into the section each sibling until you reach the next section marker. As everything should be at the document root, you shouldn't even need to look into children Elements. Should be pretty simple once you become familiar with the ElementTree API.

[1]: https://github.com/waylan/Python-Markdown/wiki/Third-Party-Extensions
[2]: https://github.com/aleray/mdx_outline

Waylan Limberg

> On May 25, 2016, at 7:21 PM, Slaughter, Andrew E <and...@in...> wrote:
> 
> I am working on creating a custom extension to parse markdown into Reveal.js slides. I understand that Reveal.js already understands markdown, but I want to parse additional custom syntax that I already generated, thus I want to convert to html directly.
> 
> Has anyone done something similar or can someone provide me with a similar example? I am just looking for something to kick me in the proper direction, I have created custom pattern extensions but I believe I will need a BlockProcessor or possibly a Preprocessor to do this.
> 
> In short, I need to convert the demo.md to the demo.html shown below, which simply requires the delimiter (!---) to mark the location of a <section> break. Any help pointing me in the correct direction would be greatly appreciated.
> 
> ---demo.md--------------------------------------------------------------
> Slide 1
> 
> * Item 1
> * Item 2
> 
> !---
> 
> Slide 2
> 
> Some thing really import
> goes here, with custom markdown syntax.
> 
> !---
> 
> Slide 3
> 
> ```python
> for i in range(10):
>     print i
> ```
> 
> This needs to be converted to, notice the '!---' lines are replace with <section>.
> ---demo.html----------------------------------------------------------------
> <section>
> <p>Slide 1</p>
> <ul>
> <li>Item 1</li>
> <li>Item 2</li>
> </ul>
> </section>
> <section>
> <p>Slide 2</p>
> <p>Some thing really import
> goes here, with custom markdown syntax.</p>
> </section>
> <section>
> <p>Slide 3</p>
> <p><code>python
> for i in range(10):
> print i</code></p>
> </section> 
> ------------------------------------------------------------------------------
> Mobile security can be enabling, not merely restricting. Employees who
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> _______________________________________________
> Python-markdown-discuss mailing list
> Pyt...@li...
> https://lists.sourceforge.net/lists/listinfo/python-markdown-discuss

I am working on creating a custom extension to parse markdown into Reveal.js
<http://lab.hakim.se/reveal-js/#/> slides. I understand that Reveal.js
already understands markdown, but I want to parse additional custom syntax
that I already generated, thus I want to convert to html directly.

Has anyone done something similar or can someone provide me with a similar
example? I am just looking for something to kick me in the proper
direction, I have created custom pattern extensions but I believe I will
need a BlockProcessor or possibly a Preprocessor to do this.

In short, I need to convert the demo.md to the demo.html shown below, which
simply requires the delimiter (!---) to mark the location of a <section>
break. Any help pointing me in the correct direction would be greatly
appreciated.

---demo.md--------------------------------------------------------------
Slide 1

* Item 1
* Item 2

!---

Slide 2

Some thing really import
goes here, with custom markdown syntax.

!---

Slide 3

```python
for i in range(10):
    print i
```

This needs to be converted to, notice the '!---' lines are replace with
<section>.
---demo.html----------------------------------------------------------------
<section>
<p>Slide 1</p>
<ul>
<li>Item 1</li>
<li>Item 2</li>
</ul>
</section>
<section>
<p>Slide 2</p>
<p>Some thing really import
goes here, with custom markdown syntax.</p>
</section>
<section>
<p>Slide 3</p>
<p><code>python
for i in range(10):
print i</code></p>
</section>

Daniel,

Sorry for the delayed response. You are correct that an inlinepattern would not be able to do this alone. Inlinepatterns have no knowledge about the context and no access to the parent. You will probably need to use a combination of multiple different processors. Perhaps an inlinepattern and a treeprocessor.  For an example of how to use multiple different processors together, I would suggest taking a look at the footnotes extension. A preproccessor finds the footnotes and stores them on the the Markdown class instance, a inlinepattern creates the footnote links, and a postprocessor inserts the footnotes into the document.

I expect you would do something similar. Except that in your case the inlinepattern would store the strings on the class instance and a treeprocessor would insert the new elements in the appropriate locations. At least that is the approach I would start with.

Hope that helps and feel free to ask specific questions if you need to.

Waylan Limberg

> On May 19, 2016, at 10:32 AM, Daniel Miller <dm...@am...> wrote:
> 
> I'm new to both Python and Python-Markdown - so if I express myself poorly I apologize.
>  
> I asked a previous question - which was probably the wrong one.  So I'll try this way.  Given some Markdown source, where a delimited string appears, I want to strip those delimiters and leave the text exactly where it is - AND create a new <span> element that should be inserted into the tree before the enclosing paragraph.  Looking at examples for inlinepatterns I don't see how to do that.
>  
> --
> Daniel
> ------------------------------------------------------------------------------
> Mobile security can be enabling, not merely restricting. Employees who
> bring their own devices (BYOD) to work are irked by the imposition of MDM
> restrictions. Mobile Device Manager Plus allows you to control only the
> apps on BYO-devices by containerizing them, leaving personal data untouched!
> https://ad.doubleclick.net/ddm/clk/304595813;131938128;j
> _______________________________________________
> Python-markdown-discuss mailing list
> Pyt...@li...
> https://lists.sourceforge.net/lists/listinfo/python-markdown-discuss

I'm new to both Python and Python-Markdown - so if I express myself 
poorly I apologize.

I asked a previous question - which was probably the wrong one.  So I'll 
try this way.  Given some Markdown source, where a delimited string 
appears, I want to strip those delimiters and leave the text exactly 
where it is - AND create a new <span> element that should be inserted 
into the tree before the enclosing paragraph.  Looking at examples for 
inlinepatterns I don't see how to do that.

--
Daniel

On 19 May 2016 at 02:43, Daniel Miller <dm...@am...> wrote:
> I found a legacy extension that generates simple pullquotes (mdx_pullquote).
> A couple of minor tweaks and it is compatible with current Markdown/Pelican
> versions.  This works quite well - except for one item.
> Markdown source:
> This is the base text. This can be very long. [This is special](+). The
> delimeters shown are what the current plugin uses with a inlinepattern.
>
> Current output html using only inlinepattern:
> <p>This is the base text. This can be very long. <span data-pullquote="This
> is special">This is special</span>. The delimeters shown are what the
> current plugin uses with a inlinepattern.</p>
>
> Desired output html using...(here's where I need help)
> <span>This is special</span>
> <p>This is the base text. This can be very long. This is special. The
> delimeters shown are what the current plugin uses with a inlinepattern.</p>
>
> What extension tool would possibly work for this?  Treeprocessor?

An xpath tool, only if the generated html is well formed.
the real problem is isolating the span from others? There appears
to be no class attribute to differentiate it from other spans?

If you can change it to <span class="special">  then it is easy.
An identity transform with a template matching the very first span
with that class attribute.

<xsl:template match="span[@class='special']"/>

which will remove it...

It may well be easier to remove it where it is generated?

I.e. remove the source of the problem, not a symptom?

HTH





-- 
Dave Pawson
XSLT XSL-FO FAQ.
Docbook FAQ.
http://www.dpawson.co.uk

I found a legacy extension that generates simple pullquotes 
(mdx_pullquote).  A couple of minor tweaks and it is compatible with 
current Markdown/Pelican versions.  This works quite well - except for 
one item.

The generated html from the processing (Markdown is used as a 
preprocessor for Pelican for generating html) places each paragraph in a 
<p> (which is correct) and delimits the appropriate text with a <span> 
within the paragraph.  The problem is because the <span> appears within 
the paragraph, and it appears wherever the text is defined - vertical 
placement of the span is limited.

If that's not clear I have a fiddle at 
https://jsfiddle.net/HeavyThumper/e4e01p0h/ that shows a sample 
generated html.

What I would like is to have the selected text copied to a <span> or 
<div> that is declared before and outside of the base <p>.  Simple 
example:

Markdown source:
This is the base text. This can be very long. [This is special](+). The 
delimeters shown are what the current plugin uses with a inlinepattern.

Current output html using only inlinepattern:
<p>This is the base text. This can be very long. <span 
data-pullquote="This is special">This is special</span>. The delimeters 
shown are what the current plugin uses with a inlinepattern.</p>

Desired output html using...(here's where I need help)
<span>This is special</span>
<p>This is the base text. This can be very long. This is special. The 
delimeters shown are what the current plugin uses with a 
inlinepattern.</p>

What extension tool would possibly work for this?  Treeprocessor?

--
Daniel

Waylan,

On Wednesday, 2016-04-06 18:31:57 +0000, you wrote:

> ...
> If you would like HTML entities to be escaped as well as HTML tags, then you can remove the `entity` inlinePattern. Just add the appropriate line to your Extension class:
> 
>     class EscapeHtml(Extension):
>         def extendMarkdown(self, md, md_globals):
>             del md.preprocessors['html_block']
>             del md.inlinePatterns['html']
>             del md.inlinePatterns['entity']
> 
> Hope that helps.

Works like a charme, thankyou :-)

Sincerely,
  Rainer

Sorry for the delayed response. I found this message at the bottom of a long list of things waiting for me to write a reply.

If you would like HTML entities to be escaped as well as HTML tags, then you can remove the `entity` inlinePattern. Just add the appropriate line to your Extension class:

    class EscapeHtml(Extension):
        def extendMarkdown(self, md, md_globals):
            del md.preprocessors['html_block']
            del md.inlinePatterns['html']
            del md.inlinePatterns['entity']

Hope that helps.
Waylan Limberg

On Mar 25, 2016, at 11:57 AM, Dr Rainer Woitok <rai...@gm...> wrote:

Greetings,

in the release notes for version 2.6 I found the following workaround
for the former "save_mode='escape'" option:

$ cat test
#! /usr/bin/env python
# -*- coding: iso-8859-1 -*-

import markdown
from markdown.extensions import Extension

class EscapeHtml(Extension):
def extendMarkdown(self, md, md_globals):
del md.preprocessors['html_block']
del md.inlinePatterns['html']

print markdown.markdown('<&>:& becomes &amp;', extensions=[EscapeHtml()])
$ ./test
<p>&lt;&amp;&gt;:&amp; becomes &amp;</p>
$

However, I would expect the output to be

<p>&lt;&amp;&gt;:&amp; becomes &amp;amp;</p>

and that is also what the former "save_mode='escape'" did. Is there an
easy way to modify the above "EscapeHtml" extension so it will also esc-
ape the "&" in "&amp;"?

Any pointers appreciated.

Sincerely,
Rainer

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Greetings,

in the release notes  for version 2.6  I found the  following workaround
for the former "save_mode='escape'" option:

$ cat test
#! /usr/bin/env python
# -*- coding: iso-8859-1 -*-

import markdown
from markdown.extensions import Extension

class EscapeHtml(Extension):
   def extendMarkdown(self, md, md_globals):
       del md.preprocessors['html_block']
       del md.inlinePatterns['html']

print markdown.markdown('<&>:& becomes &amp;', extensions=[EscapeHtml()])
$ ./test
<p>&lt;&amp;&gt;:&amp; becomes &amp;</p>
$

However, I would expect the output to be

   <p>&lt;&amp;&gt;:&amp; becomes &amp;amp;</p>

and that is also what the former "save_mode='escape'" did.   Is there an
easy way to modify the above "EscapeHtml" extension so it will also esc-
ape the "&" in "&amp;"?

Any pointers appreciated.

Sincerely,
  Rainer

On 23 March 2016 at 16:50, Maurice van der Pot <gri...@kf...> wrote:
> On Wed, Mar 23, 2016 at 07:26:33AM +0000, Dave Pawson wrote:
>> > It might be, but I consider rowspan/colspan to be a content decision and
>> > not a styling one.
>>
>> I disagree. Presentation - spanning, is not, IMHO, content.
>
> Ok, then I'm not sure how you would separate the content from spanning.
> Would you always create all cells in the content and merge them in
> presentation?

The content (my view) is within the cells, not how the cell content
is shown.


>
> What would you expect to find in the content for a table that has a row
> of which the first cell should span 2 columns?

As today

|content||

then some 'identity' for that row (table[@id='table1']/tr[3]/td[1] )
then some styling information, e.g. 'span=2'

which enables the presentational aspect to be specified external
to the content?



>
> And similarly, what would you expect in the content for a table that has
> a cell in the first column that (when presented) should span 2 rows?

The same mechanism will work. For example

table[@id='table1']/tr[3]/td[1], rowspan=2

with no change to MD syntax?

HTH


-- 
Dave Pawson
XSLT XSL-FO FAQ.
Docbook FAQ.
http://www.dpawson.co.uk

On Wed, Mar 23, 2016 at 09:52:15AM -0400, Waylan Limberg wrote:
> Please see my response here: 
> https://github.com/waylan/Python-Markdown/pull/74#issuecomment-3622297
> 
> So to answer your question, no I am not interested in making changes to 
> th existing Extension. I would suggest you build your own.

Ah, a clear description of your position. Thanks!

Maurice.

-- 
Maurice van der Pot

Kdiff3 developer   gri...@kf...   http://kdiff3.sourceforge.net
Tdiff3 developer                            https://github.com/Griffon26/tdiff3