public NashornProcessor(File documentRoot, String documentPath)
throws ScriptException, IOException, SAXException {
// The document root must be a valid directory
assert (documentRoot.isDirectory());
// The document root is needed for evaluating script files that are
// marked with absolute path in the src attribute
this.documentRoot = documentRoot;
// Let's see if we could find the document that has been inferred
File file = new File(documentRoot, documentPath);
// Keep the parent of this file for relative path based file access
basePath = file.getParentFile();
document = HTMLDocument.parse(new FileInputStream(file));
ScriptEngine e = new ScriptEngineManager().getEngineByName("nashorn");
assert (e instanceof NashornScriptEngine);
engine = (NashornScriptEngine) e;
// TODO get base href and implement set basePath and use it accordingly
// The basePath can also have full URL which makes it tricky
// HTMLElement[] scriptElements = document.getElementsByTagName("base");
HTMLElement[] parts = {document.getHead(), document.getBody()};
CompiledScript[][] res = new CompiledScript[2][];
for (int i = 0; i < parts.length; ++i) {
HTMLElement[] scriptElements = parts[i].getElementsByTagName("script");
res[i] = new CompiledScript[scriptElements.length];
int idx = 0;
for (HTMLElement scriptElement : scriptElements) {
// if the element has a src tag then we work on a file otherwise, we
// expect either a CDATA section or a TEXT section within the
// script element
String scriptFile = scriptElement.getAttribute("src");
CompiledScript script;
if (scriptFile == null) {
script = loadTextScript(scriptElement);
} else {
script = loadFileScript(scriptFile);
}
res[i][idx++] = script;
}
}
headScripts = res[0];
bodyScripts = res[1];
}
/* Compile a script as a text element provided as a text node or a cdata section
or a combination
*/
private CompiledScript loadTextScript(HTMLElement scriptElement) throws ScriptException {
StringBuilder scriptText = new StringBuilder();
for (HTMLNode node : scriptElement.getChildNodes()) {
// only allowed are text nodes or cdata section
assert (node.isText() || node.isCdataSection());
scriptText.append(node.getNodeValue());
}
return engine.compile(scriptText.toString());
}
