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Code Issues Releases Wiki Activity

Error handling for KaTeX plugin

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This commit is contained in:
Jermolene 2014-09-24 11:50:49 +02:00
parent 61af1f9379
commit b3df07ae3e
2 changed files with 17 additions and 1 deletions
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11
editions/katexdemo/tiddlers/HelloThere.tid
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@ -63,3 +63,14 @@ For more flexibility the KaTeX widget can also be used via the full widget synta
```
<$latex text="\displaystyle f(x) = \int_{-\infty}^\infty\hat f(\xi)\,e^{2 \pi i \xi x}\,d\xi"></$latex>
! Error Handling
An warning message is displayed if KaTeX detects a problem with the ~LaTeX syntax. For example:
```
$$\displaystyle f(x) = \int_{-\infty}^\infinity\hat f(\xi)\,e^{2 \pi i \xi x}\,d\xi$$
```
$$\displaystyle f(x) = \int_{-\infty}^\infinity\hat f(\xi)\,e^{2 \pi i \xi x}\,d\xi$$

5
plugins/tiddlywiki/katex/wrapper.js
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@ -36,7 +36,12 @@ KaTeXWidget.prototype.render = function(parent,nextSibling) {
var text = this.getAttribute("text",this.parseTreeNode.text || "");
// Render it into a span
var span = this.document.createElement("span");
try {
katex.render(text,span);
} catch(ex) {
span.className = "tc-error";
span.textContent = ex;
}
// Insert it into the DOM
parent.insertBefore(span,nextSibling);
this.domNodes.push(span);