Inconsistent results of returning the original or a new Image in lua filter

Inconsistent results of returning the original or a new Image in lua filter

[jiewuza]

In my markdown file, it has
```
![This is the caption](image.png)
```

And I have in my lua filter
```
function Image(img)
   return img
end
```

When converting it into latex, I get
```
\begin{figure}
\centering
\includegraphics{image.png}
\caption{This is the caption}
\end{figure}
```

And if I modify the function
```
function Image(img)
   return pandoc.Image(img.caption, img.src)
end
```

I just get:
```
\includegraphics{image.png}
```

Re: Inconsistent results of returning the original or a new Image in lua filter

[Albert Krewinkel]

jiewuza writes:

> In my markdown file, it has
> ```
> ![This is the caption](image.png)
> ```
>
> And I have in my lua filter
> ```
> function Image(img)
>    return img
> end
> ```
>
> When converting it into latex, I get
> ```
> \begin{figure}
> \centering
> \includegraphics{image.png}
> \caption{This is the caption}
> \end{figure}
> ```
>
> And if I modify the function
> ```
> function Image(img)
>    return pandoc.Image(img.caption, img.src)
> end
> ```
>
> I just get:
> ```
> \includegraphics{image.png}
> ```

Pandoc's writers treat images as figures iff

1. the image is the only element in a paragraph, and
2. the image's title begins with the string 'fig:'.

The modified function removes the title from the image element, so
condition 2 is no longer satisfied. The title can be passed as the third
argument to the `pandoc.Image` function, which will mark it as a figure
again:

    function Image(img)
      return pandoc.Image(img.caption, img.src, img.title)
    end

--
Albert Krewinkel
GPG: 8eed e3e2 e8c5 6f18 81fe  e836 388d c0b2 1f63 1124

Re: Inconsistent results of returning the original or a new Image in lua filter

[jiewuza]

Good to know it.
Thank you.

Albert Krewinkel <albert+pandoc-9EawChwDxG8hFhg+JK9F0w@public.gmane.org>
writes:

> jiewuza writes:
>
>> In my markdown file, it has
>> ```
>> ![This is the caption](image.png)
>> ```
>>
>> And I have in my lua filter
>> ```
>> function Image(img)
>>    return img
>> end
>> ```
>>
>> When converting it into latex, I get
>> ```
>> \begin{figure}
>> \centering
>> \includegraphics{image.png}
>> \caption{This is the caption}
>> \end{figure}
>> ```
>>
>> And if I modify the function
>> ```
>> function Image(img)
>>    return pandoc.Image(img.caption, img.src)
>> end
>> ```
>>
>> I just get:
>> ```
>> \includegraphics{image.png}
>> ```
>
> Pandoc's writers treat images as figures iff
>
> 1. the image is the only element in a paragraph, and
> 2. the image's title begins with the string 'fig:'.
>
> The modified function removes the title from the image element, so
> condition 2 is no longer satisfied. The title can be passed as the third
> argument to the `pandoc.Image` function, which will mark it as a figure
> again:
>
>     function Image(img)
>       return pandoc.Image(img.caption, img.src, img.title)
>     end
>
> --
> Albert Krewinkel
> GPG: 8eed e3e2 e8c5 6f18 81fe  e836 388d c0b2 1f63 1124

Re: Inconsistent results of returning the original or a new Image in lua filter

[jiewuza]

Albert Krewinkel <albert+pandoc-9EawChwDxG8hFhg+JK9F0w@public.gmane.org>
writes:

>
> Pandoc's writers treat images as figures iff
>
> 1. the image is the only element in a paragraph, and
> 2. the image's title begins with the string 'fig:'.
>
> The modified function removes the title from the image element, so
> condition 2 is no longer satisfied. The title can be passed as the third
> argument to the `pandoc.Image` function, which will mark it as a figure
> again:
>
>     function Image(img)
>       return pandoc.Image(img.caption, img.src, img.title)
>     end
>

I also tried
```
function Image(img)
   print(obj.t, TableToStr(obj))
   return pandoc.Para{pandoc.Image(img.caption, img.src)}
end
```

But the image goes away from the output.

Is it because Image is inline and Para is block? But no error is reported.