def log_filter_by_tag(document: QTextDocument, tag_selected: dict):
""" Filter a document, setting visibility according to the tag """
document: QTextDocument
block: QTextBlock
block = document.begin()
while block.isValid():
data = block.userData()
if data is not None:
tag: dict = data.get_data()
if tag is not None:
if tag_selected == LOGGER_TAGS[0]:
block.setVisible(True)
elif tag != LOGGER_TAGS[0] and tag != tag_selected:
block.setVisible(False)
else:
block.setVisible(True)
block = block.next()
