In elements where line breaks are not collapsed, e.g. <textarea> and elements with white-space:pre|pre-line|pre-wrap, line breaks should constitute UBA paragraph breaks. When a line break introduces a UBA paragraph break, the base direction of the new UBA paragraph will be determined by the computed direction of the nearest ancestor element whose bidi properties require its contents to be in a separate UBA paragraph (or sequence of paragraphs), e.g. a block element or an element directionally isolated by the ubi attribute (which is being proposed in a separate bug). Furthermore, for every element on the path in between that results in the creation of an embedding or override level, e.g. a <bdo> element or any element with a dir attribute or a value other than "normal" for the unicode-bidi CSS property, the correspondeng embedding or override level is re-introduced at the start of the new UBA paragraph (to be closed at the end of the element or the UBA paragraph, whichever comes first). For more information, see: * <http://www.w3.org/International/docs/html-bidi-requirements/#newline-as-separator> * <http://www.w3.org/Bugs/Public/show_bug.cgi?id=10812>

Related: <https://bugzilla.mozilla.org/show_bug.cgi?id=607640>