DoenetML-authored custom components

[StevenClontz]

Pitch: authors (i.e. not developers) should be able to write custom components in DoenetML itself.

This is possible via the existing <module/>. See https://beta.doenet.org/activityViewer/1dWuAB4RgZo98NquDzh8xa

<setup>
<module name="fancyInput">
  <moduleAttributes>
     <math name="value">0</math>
     <math name="computedValue" simplify>$value+1</math>
  </moduleAttributes>
  <p>
  <label styleNumber="$value">
    Value = $value
  </label>
  <mathInput>$value</mathInput>
  </p>
</module>
</setup>

<module copy="$fancyInput" value="1" name="x"/>
<module copy="$fancyInput" value="2" name="y"/>
<module copy="$fancyInput" value="3" name="z"/>

The second value plus one is $y.computedValue

So what I'm proposing is a way for authors to create and share these custom modules. This allows for the extension of DoenetML to new domains without needing programming expertise (as long as the custom component can be reasonably expressed in existing DoenetML).

Bonus points if we can extend module to work like this:

• <module componentName="foo"/> creates a new tag <foo/> which can be used in the same way as <module copy="$foo"/>
• Support <module name="customP"><moduleContent name="content"/><p>$content</p></module> to make <module copy="$customP">bar</module> work as <p>bar</p>.