Can we get auto figure numbering?

Can we get auto figure numbering?

[CR]

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Thank you for this very handy utility! I use Markdown to convert really old 
public domain books into EPUB. 

I'd like to make all my images figures with a caption of "Figure 1" that 
precedes any alt text. So if I use Markdown to make an EPUB and I code and 
image like this: 

![Fig @fignum@: This is a figure](images\fig01.jpg)
>

The caption would be auto numbered and rendered as 

Figure 1: This is a figure
>

Successive figures would be autonumbered using the @fignum@ placeholder, or 
whatever placeholder the author uses. 

Thus, no matter which order I type in figures, figures will be numered in 
the order they physically appear in one or more Markdown files that make up 
an EPUB book.

Would this be a possible feature to add to a later version of Pandoc? The 
name of the extension could be "autonumber_figures" or something like that. 
Currently I only need it to convert Markdown into EPUB files.




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Re: Can we get auto figure numbering?

[Christophe Demko]

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You could develop a pandoc filter for that. 
See https://github.com/jgm/pandoc/wiki/Pandoc-Filters for some examples

Le mardi 3 juillet 2018 13:57:55 UTC+2, CR a écrit :
>
> Thank you for this very handy utility! I use Markdown to convert really 
> old public domain books into EPUB. 
>
> I'd like to make all my images figures with a caption of "Figure 1" that 
> precedes any alt text. So if I use Markdown to make an EPUB and I code and 
> image like this: 
>
> ![Fig @fignum@: This is a figure](images\fig01.jpg)
>>
>
> The caption would be auto numbered and rendered as 
>
> Figure 1: This is a figure
>>
>
> Successive figures would be autonumbered using the @fignum@ placeholder, 
> or whatever placeholder the author uses. 
>
> Thus, no matter which order I type in figures, figures will be numered in 
> the order they physically appear in one or more Markdown files that make up 
> an EPUB book.
>
> Would this be a possible feature to add to a later version of Pandoc? The 
> name of the extension could be "autonumber_figures" or something like that. 
> Currently I only need it to convert Markdown into EPUB files.
>
>
>
>
>

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Re: Can we get auto figure numbering?

[Robert Zenz]

As a matter of fact, this should be rather easy, something like this (without
any testing and pure guessing):

	local imageCounter = 1;

	return {
		{ Image = function(image)
			image.caption = "Figure " .. imageCounter ..": " .. image.caption
			imageCounter = imageCounter + 1
			
			return image
		end}
	}

One thing to be aware of is that figures are not present in the native tree that
Pandoc generates and uses. They are only generated when writing output, if I
remember correctly, when an image is the sole item inside a paragraph. So if you
tinker with the structure, you won't get figures anymore, at least not
automatically.


On 04.07.2018 14:54, Christophe Demko wrote:
> You could develop a pandoc filter for that. 
> See https://github.com/jgm/pandoc/wiki/Pandoc-Filters for some examples
> 
> Le mardi 3 juillet 2018 13:57:55 UTC+2, CR a écrit :
>>
>> Thank you for this very handy utility! I use Markdown to convert really 
>> old public domain books into EPUB. 
>>
>> I'd like to make all my images figures with a caption of "Figure 1" that 
>> precedes any alt text. So if I use Markdown to make an EPUB and I code and 
>> image like this: 
>>
>> ![Fig @fignum@: This is a figure](images\fig01.jpg)
>>>
>>
>> The caption would be auto numbered and rendered as 
>>
>> Figure 1: This is a figure
>>>
>>
>> Successive figures would be autonumbered using the @fignum@ placeholder, 
>> or whatever placeholder the author uses. 
>>
>> Thus, no matter which order I type in figures, figures will be numered in 
>> the order they physically appear in one or more Markdown files that make up 
>> an EPUB book.
>>
>> Would this be a possible feature to add to a later version of Pandoc? The 
>> name of the extension could be "autonumber_figures" or something like that. 
>> Currently I only need it to convert Markdown into EPUB files.
>>
>>
>>
>>
>>
> 

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Re: Can we get auto figure numbering?

[Axel Rauschmayer]

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Have you tried this filter? It works really well for 
me: https://github.com/lierdakil/pandoc-crossref

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