def from_model(model_doc: model.ContentDocument) -> et.Element:
tt_element = et.Element(TTElement.qn)
imsc_attr.XMLLangAttribute.set(tt_element, model_doc.get_lang())
if model_doc.get_cell_resolution() != model.CellResolutionType(
rows=15, columns=32):
imsc_attr.CellResolutionAttribute.set(
tt_element, model_doc.get_cell_resolution())
has_px = False
all_elements = list(model_doc.iter_regions())
if model_doc.get_body() is not None:
all_elements.extend(model_doc.get_body().dfs_iterator())
for element in all_elements:
for model_style_prop in element.iter_styles():
if StyleProperties.BY_MODEL_PROP[model_style_prop].has_px(
element.get_style(model_style_prop)):
has_px = True
break
if has_px:
break
if model_doc.get_px_resolution() is not None and has_px:
imsc_attr.ExtentAttribute.set(tt_element,
model_doc.get_px_resolution())
if model_doc.get_active_area() is not None:
imsc_attr.ActiveAreaAttribute.set(tt_element,
model_doc.get_active_area())
# Write the <head> section first
head_element = HeadElement.from_model(model_doc)
if head_element is not None:
tt_element.append(head_element)
model_body = model_doc.get_body()
if model_body is not None:
body_element = BodyElement.from_model(model_body)
if body_element is not None:
tt_element.append(body_element)
return tt_element
def from_model(
model_doc: model.ContentDocument,
frame_rate: typing.Optional[Fraction],
time_expression_syntax: imsc_attr.TimeExpressionSyntaxEnum,
progress_callback: typing.Callable[[numbers.Real], typing.NoReturn]
) -> et.Element:
'''Converts the data model to an IMSC document contained in an ElementTree Element'''
ctx = TTMLElement.WritingContext(frame_rate, time_expression_syntax)
tt_element = et.Element(TTElement.qn)
imsc_attr.XMLLangAttribute.set(tt_element, model_doc.get_lang())
if model_doc.get_cell_resolution() != model.CellResolutionType(rows=15, columns=32):
imsc_attr.CellResolutionAttribute.set(tt_element, model_doc.get_cell_resolution())
has_px = False
all_elements = list(model_doc.iter_regions())
if model_doc.get_body() is not None:
all_elements.extend(model_doc.get_body().dfs_iterator())
for element in all_elements:
for model_style_prop in element.iter_styles():
if StyleProperties.BY_MODEL_PROP[model_style_prop].has_px(element.get_style(model_style_prop)):
has_px = True
break
for animation_step in element.iter_animation_steps():
if StyleProperties.BY_MODEL_PROP[animation_step.style_property].has_px(animation_step.value):
has_px = True
break
if has_px:
break
if model_doc.get_px_resolution() is not None and has_px:
imsc_attr.ExtentAttribute.set(tt_element, model_doc.get_px_resolution())
if model_doc.get_active_area() is not None:
imsc_attr.ActiveAreaAttribute.set(tt_element, model_doc.get_active_area())
if model_doc.get_display_aspect_ratio() is not None:
imsc_attr.DisplayAspectRatioAttribute.set(tt_element, model_doc.get_display_aspect_ratio())
if frame_rate is not None:
imsc_attr.FrameRateAttribute.set(tt_element, frame_rate)
# Write the <head> section first
head_element = HeadElement.from_model(ctx, model_doc)
progress_callback(0.5)
if head_element is not None:
tt_element.append(head_element)
model_body = model_doc.get_body()
if model_body is not None:
body_element = BodyElement.from_model(ctx, model_body)
if body_element is not None:
tt_element.append(body_element)
progress_callback(1.0)
return tt_element