I'm trying to create an HTML document containing Javascript using Qt XML. Here is the relevant part of my Qt code:
QDomDocument document;
//Create head, body, etc
QDomElement script = document.createElement("script");
script.setAttribute("type", "text/javascript");
body.appendChild(script); //body is the QDomElement representing the <body> tag
QDomText scriptText = document.createTextNode("if(x < 0){\n/*do something*/\n}");
script.appendChild(scriptText);
QFile file("C:\\foo.html");
file.open(QIODevice::WriteOnly);
QTextStream stream(&file);
stream << document.toString();
The problem is that in the Javascript code, it's escaping the < character replacing it with <, giving the following output which isn't valid Javascript:
<script type="text/javascript">
if(x < 0){
/*do something*/
}
</script>
I've searched the Qt documentation for a solution, but haven't found anything.
A workaround could be to replace < with < when writing in the file by doing stream << document.toString().replace("<", "<"), but there might also be occurrences of < outside of the Javascript code that I want to leave alone.
I can also think of a few Javascript tricks to check if a number is negative without using any special HTML characters, like for example if(String(x).indexOf('-') != -1), but I would like to know if there is a better way of doing it.
My question is how do I create a QDomText object with text containing special HTML characters like <, >, &, etc without them being escaped in QDomDocument::toString()?
You can put the javascript code in a CDATA section:
then remove the unwanted text right after: