Paste from External Sources (MathJax in the wild, Wikipedia, etc.) about prosemirror-math HOT 3 OPEN

I started to implement pasting of math from Wikipedia using a custom ProseMirror ParseRule (and the .getContent property), but ran into some unexpected behavior where the pasted math nodes all come up empty. I started a question on the ProseMirror forum which will hopefully resolve the issue.

from prosemirror-math.

This website has math rendered using Madoko, which renders math and diagram SVGs server-side and includes them the following format:

<svg class="snippet math-display math-render-svg math" data-math-full="true" style="..." viewBox="...">
    <desc>\begin{tikzpicture}
    \matrix[nodes={draw}, row sep=0.3cm,column sep=0.5cm] {
      \node [rectangle, draw=none] (eq) {$a = b, b = c, d = e, b = s, d = t: $};&
      \node [circle, draw] (abcs) {$a, b, c, s$}; &
      \node [circle, draw] (det) {$d, e, t$}; \\
    };
    \end{tikzpicture}
    </desc>
    <g id="math-a6e187">...</g>
</svg>

This example contains an SVG rendering of a tikz diagram, which is obviously problematic for KaTeX, which is the current default. Once MathJax is supported, an extension like TikzJax can be used to render diagrams.

UPDATE: It won't be possible to paste from documents rendered with Madoko. The TeX source is contained in a <desc> tag within an SVG element, and apparently the <desc> tags are stripped away in both Chrome and Firefox when copying.

from prosemirror-math.

UPDATE: StackExchange keeps its TeX code in <script type="math/tex"> tags, but these are stripped away when copying for security reasons. To copy from StackExchange, we'll need to parse the MathML directly.

from prosemirror-math.