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// This is a helper for generating invalid MathML markup.
// Depends on ./mathml-fragments.js
function isValid(tagName, mspaceCount) {
switch (tagName) {
case "mfrac":
case "mroot":
case "munder":
case "mover":
case "msub":
case "msup":
return mspaceCount == 2;
case "munderover":
case "msubsup":
return mspaceCount == 3;
case "mmultiscripts":
return mspaceCount % 2 == 1;
}
}
function generateInvalidMarkup() {
let container = document.createElement("div");
["mfrac", "mroot", "munder", "mover", "munderover", "msub", "msup", "msubsup", "mmultiscripts"].forEach(tag => {
let math = FragmentHelper.createElement("math");
let element = FragmentHelper.createElement(tag);
let reference = FragmentHelper.createElement("mrow");
math.appendChild(element);
math.appendChild(reference);
let maxCount = tag == "mmultiscripts" ? 10 : 5;
let mspaceCount = 0;
for (let count = 0; count <= maxCount; count++) {
element.dataset.description = `count == ${count}`;
if (!isValid(tag, mspaceCount)) {
container.appendChild(math.cloneNode(true));
}
if (tag == "mmultiscripts" && count == maxCount / 2) {
[element, reference].forEach(el => {
el.insertAdjacentHTML("beforeend", `<mprescripts/>`);
});
} else {
let width = (count + 1) * 10;
let height = (count + 1) * (count % 2 ? 15 : 5);
let depth = (count + 1) * (count % 2 ? 5 : 15);
[element, reference].forEach(el => {
el.insertAdjacentHTML("beforeend", `<mspace height="${height}px" depth="${depth}px" width="${width}px" style="background: black"/>`);
});
mspaceCount++;
}
}
});
container.insertAdjacentHTML("beforeend", `
<math>
<mmultiscripts data-description="first in-flow child is an <mprescripts>">
<mprescripts/>
<mspace height="5px" depth="15px" width="10px" style="background: black"/>
<mspace height="30px" depth="10px" width="20px" style="background: black"/>
<mspace height="15px" depth="45px" width="30px" style="background: black"/>
<mspace height="60px" depth="20px" width="40px" style="background: black"/>
</mmultiscripts>
<mrow>
<mprescripts/>
<mspace height="5px" depth="15px" width="10px" style="background: black"/>
<mspace height="30px" depth="10px" width="20px" style="background: black"/>
<mspace height="15px" depth="45px" width="30px" style="background: black"/>
<mspace height="60px" depth="20px" width="40px" style="background: black"/>
</mrow>
</math>
<math>
<mmultiscripts data-description="one of the even number of children after the first <mprescripts> is an <mprescripts>">
<mspace height="5px" depth="15px" width="10px" style="background: black"/>
<mspace height="30px" depth="10px" width="20px" style="background: black"/>
<mspace height="15px" depth="45px" width="30px" style="background: black"/>
<mprescripts/>
<mspace height="60px" depth="20px" width="40px" style="background: black"/>
<mprescripts/>
<mspace height="25px" depth="75px" width="50px" style="background: black"/>
<mspace height="35px" depth="105px" width="70px" style="background: black"/>
</mmultiscripts>
<mrow>
<mspace height="5px" depth="15px" width="10px" style="background: black"/>
<mspace height="30px" depth="10px" width="20px" style="background: black"/>
<mspace height="15px" depth="45px" width="30px" style="background: black"/>
<mprescripts/>
<mspace height="60px" depth="20px" width="40px" style="background: black"/>
<mprescripts/>
<mspace height="25px" depth="75px" width="50px" style="background: black"/>
<mspace height="35px" depth="105px" width="70px" style="background: black"/>
</mrow>
</math>
`);
return container;
}