/**
* Get a Tag by name. If not previously defined (unknown), returns a new generic tag, that can do
* anything.
*
* <p>Pre-defined tags (P, DIV etc) will be ==, but unknown tags are not registered and will only
* .equals().
*
* @param tagName Name of tag, e.g. "p". Case insensitive.
* @return The tag, either defined or new generic.
*/
public static Tag valueOf(String tagName) {
Validate.notNull(tagName);
Tag tag = tags.get(tagName);
if (tag == null) {
tagName = tagName.trim().toLowerCase();
Validate.notEmpty(tagName);
tag = tags.get(tagName);
if (tag == null) {
// not defined: create default; go anywhere, do anything! (incl be
// inside a <p>)
tag = new Tag(tagName);
tag.isBlock = false;
tag.canContainBlock = true;
}
}
return tag;
}
static {
// creates
for (final String tagName : blockTags) {
final Tag tag = new Tag(tagName);
register(tag);
}
for (final String tagName : inlineTags) {
final Tag tag = new Tag(tagName);
tag.isBlock = false;
tag.canContainBlock = false;
tag.formatAsBlock = false;
register(tag);
}
// mods:
for (final String tagName : emptyTags) {
final Tag tag = tags.get(tagName);
Validate.notNull(tag);
tag.canContainBlock = false;
tag.canContainInline = false;
tag.empty = true;
}
for (final String tagName : formatAsInlineTags) {
final Tag tag = tags.get(tagName);
Validate.notNull(tag);
tag.formatAsBlock = false;
}
for (final String tagName : preserveWhitespaceTags) {
final Tag tag = tags.get(tagName);
Validate.notNull(tag);
tag.preserveWhitespace = true;
}
}