def extract(ttml_element) -> model.ActiveAreaType:
aa = ttml_element.attrib.get(ActiveAreaAttribute.qn)
if aa is not None:
s = aa.split(" ")
if len(s) != 4:
LOGGER.error("Syntax error in ittp:activeArea on <tt>")
return None
(left_offset, left_offset_units) = utils.parse_length(s[0])
(top_offset, top_offset_units) = utils.parse_length(s[1])
(w, w_units) = utils.parse_length(s[2])
(h, h_units) = utils.parse_length(s[3])
if w_units != "%" or h_units != "%" or left_offset_units != "%" or top_offset_units != "%":
LOGGER.error("ittp:activeArea on <tt> must use % units")
return None
return model.ActiveAreaType(left_offset / 100, top_offset / 100,
w / 100, h / 100)
return None
def extract(cls, context: StyleParsingContext, xml_attrib: str):
(value, units) = utils.parse_length(xml_attrib)
if units != "%":
raise ValueError(r"tts:shear must be expressed in % units")
return value if abs(value) <= 100 else math.copysign(100, value)
def extract(ttml_element) -> model.PixelResolutionType:
extent = ttml_element.attrib.get(ExtentAttribute.qn)
if extent is not None:
s = extent.split(" ")
(w, w_units) = utils.parse_length(s[0])
(h, h_units) = utils.parse_length(s[1])
if w_units != "px" or h_units != "px":
LOGGER.error("ttp:extent on <tt> does not use px units")
return None
return model.PixelResolutionType(w, h)
return None
def extract(ttml_element) -> typing.Optional[model.PixelResolutionType]:
extent = ttml_element.attrib.get(ExtentAttribute.qn)
if extent is not None:
s = extent.split(" ")
(w, w_units) = utils.parse_length(s[0])
(h, h_units) = utils.parse_length(s[1])
if w_units != "px" or h_units != "px":
LOGGER.error("ttp:extent on <tt> does not use px units")
return None
if not w.is_integer() or not h.is_integer():
LOGGER.error("Pixel resolution dimensions must be integer values")
return model.PixelResolutionType(int(w), int(h))
return None
def ttml_length_to_model(cls, _context: StyleParsingContext,
xml_attrib: str):
(value, units) = utils.parse_length(xml_attrib)
return styles.LengthType(value, styles.LengthType.Units(units))