/**
* Perform the action of the plugin.
*
* @param document the current document.
*/
public boolean perform(Document document) throws IOException {
// Interact with the user to get the layer tag/
Tag layerTag = getLayerTagFromUser(document);
if (layerTag == null) return false; // User cancled.
Tag endTag = new Tag(layerTag.getName(), false);
// Get the output stream to hold the new document text.
PrintWriter out = new PrintWriter(document.getOutput());
// Create a lexical stream to tokenize the old document text.
LexicalStream in = new LexicalStream(new SelectedHTMLReader(document.getInput(), out));
for (; ; ) {
// Get the next token of the document.
Token token = in.next();
if (token == null) break; // Null means we've finished the document.
else if (token instanceof Comment) {
Comment comment = (Comment) token;
if (comment.isSelectionStart()) {
out.print(layerTag);
} else if (comment.isSelectionEnd()) {
out.print(comment);
out.print(endTag);
continue; // So comment isn't printed twice.
}
}
out.print(token);
}
out.close();
return true;
}