Change "content" attribute of ForeignObject from str to Literal

[chowette]

According to the svg.xsd, the content attribute is only allowed to be "structured text" or None

svg.py/svg.xsd

Line 3209 in 9e3bece

<xs:attribute name="content" type="xs:string" fixed="structured text"/>

The MDN is not documenting this attribute. And the SVG spec did not mention it ( I checked svg 1.1 2nd, svg tiny )

[orsinium]

If it's not in the spec, would it make sense to remove it? Have you tried using it, does it do anything?

[chowette]

I only tried to use it incorrectly: by putting some html tags in it to see if it works, but obviously it did nothing....

My guess is this content ="structured text" stuff is a leftover from a xsd saying the content ( eg inner text ) should be some xml text, but it does not make sens considering the mixed="true" in the tag:

    <xs:complexType name="foreignObjectType" mixed="true">

So i vote for removing the attribute.

---

For the record, the proper way to use the <foreignobject> is to put some string in the text

<svg width="200" height="200">
   <foreignobject x="20" y="20" width="160" height="160" transform="rotate (20, 80, 80)">
      <div xmlns="http://www.w3.org/1999/xhtml">some html stuff like a <button>Button</button>
      </div>
  </foreignobject>
 </svg>

which look like this in python

from svg import *

s = SVG(width=200, height=200, elements = [
        ForeignObject(x=20, y=20, width=160, height=160, transform=[Rotate(a=20,x=80,y=80)],
        text='<div xmlns="http://www.w3.org/1999/xhtml">some html stuff like a <button>Button</button></div>')])
  
print(s.as_str())

[orsinium]

Thank you!