Initial IMSC Writer implementation (#52)

* Cleanup. Basic, dummy implementation for the imsc writer. CI passes

* Adding from_model to TTElement (#22)

* More plumbing of from_model (#22)

* Adding writing of head/layout/region information (#22)

* Adding writing of body information (#22)

* Adding writing of information for div, p, span (#22)

* Cleanup. Using get_id. Putting head before body (#22)

* fixing issue with _id vs get_id, serializing RegionAttribute

* Adding setter APIs to imsc StyleProperties (#22)

* Adding setter APIs to imsc StyleProperties (#22)

* Implementing various setters in StyleProperties. Fixing other writing issues (#22)

* Implementing various setters in StyleProperties. Cleanup (#22)

* Implementing various setters in StyleProperties. Cleanup (#22)

* Merging master to branch (#22)

* Merge cleanup (#22)

* Reapplying changes (#22)

* Setting namespaces (#22)

* Fixing writing fontSize value. Adding origin. (#22)

* Adding P begin/end (#22)

* Color write formating (#22)

* More unit tests (#22)

* Covering more sytles and properties (#22)

* Marking attributes as pass (#22)

* Made progress on IMSC style property serialization

* Implemented Br (#22)

* Basic implemention of Styling/Style/Initial (#22)

* Basic implemention of Set (#22)

* Rd/issue 22 pal suggestions (#67)

* Set elements now processed (#61)

Added coverage scripts and pre-requisites

* Suggested refactoring

* Further refactoring

* Handle set elements

* Further refinements

* Fixed set issue

* Pretty TTML output

Co-authored-by: Pierre-Anthony Lemieux <[email protected]>
Co-authored-by: Pierre-Anthony Lemieux <[email protected]>

* Do not return opacity of ff for xml value (#22)

* Do not truncate percentages. Use full percision (#22)

* Only write style if not none (#22)

* Only write style if not none (#22)

* Fixing swap of imsc and model in from_model_style_properties (#22_

* Fixing unit tests (#22)

Co-authored-by: Pierre-Anthony Lemieux <[email protected]>
Co-authored-by: Pierre-Anthony Lemieux <[email protected]>

src/main/python/ttconv/imsc/attributes.py

@@ -34,6 +34,7 @@
 import ttconv.model as model
 import ttconv.imsc.utils as utils
 import ttconv.imsc.namespaces as ns
+#import xml.etree.ElementTree as et
 
 LOGGER = logging.getLogger(__name__)
 
@@ -47,7 +48,9 @@ class XMLIDAttribute:
   def extract(ttml_element):
     return ttml_element.attrib.get(XMLIDAttribute.qn)
 
-
+  @staticmethod
+  def set(xml_element, model_value):
+    xml_element.set(XMLIDAttribute.qn, model_value)
 
 class XMLLangAttribute:
   '''xml:lang attribute
@@ -59,7 +62,9 @@ class XMLLangAttribute:
   def extract(ttml_element):
     return ttml_element.attrib.get(XMLLangAttribute.qn)
 
-
+  @staticmethod
+  def set(ttml_element, lang):
+    ttml_element.set(XMLLangAttribute.qn, lang)
 
 class XMLSpaceAttribute:
   '''xml:space attribute
@@ -94,13 +99,16 @@ class RegionAttribute:
   def extract(ttml_element):
     return ttml_element.attrib.get(RegionAttribute.qn)
 
+  @staticmethod
+  def set(ttml_element, res):
+    ttml_element.set(RegionAttribute.qn, res)
 
 
 class CellResolutionAttribute:
   '''ttp:cellResolution attribute
   '''
 
-  qn = f"{ns.TTP}cellResolution"
+  qn = f"{{{ns.TTP}}}cellResolution"
 
   _CELL_RESOLUTION_RE = re.compile(r"(\d+) (\d+)")
 
@@ -123,6 +131,9 @@ def extract(ttml_element) -> model.CellResolutionType:
 
     return model.CellResolutionType(rows=15, columns=32)
 
+  @staticmethod
+  def set(ttml_element, res):
+    ttml_element.set(CellResolutionAttribute.qn, f"{res.rows}px {res.columns}px")
 
 class ExtentAttribute:
   '''ttp:extent attribute on \\<tt\\>
@@ -151,6 +162,9 @@ def extract(ttml_element) -> model.PixelResolutionType:
 
     return None
 
+  @staticmethod
+  def set(ttml_element, res):
+    ttml_element.set(ExtentAttribute.qn, f"{res.width}px {res.height}px")
 
 class ActiveAreaAttribute:
   '''ittp:activeArea attribute on \\<tt\\>
@@ -192,6 +206,10 @@ def extract(ttml_element) -> model.ActiveAreaType:
 
     return None
 
+  @staticmethod
+  def set(ttml_element, activeArea):
+    ttml_element.set(ActiveAreaAttribute.qn, 
+      f"{(activeArea.left_offset * 100)}% {(activeArea.top_offset * 100)}% {(activeArea.width * 100)}% {activeArea.height * 100}%")
 
 class TickRateAttribute:
   '''ttp:tickRate attribute
@@ -297,6 +315,11 @@ def extract(context: TemporalAttributeParsingContext, xml_element) -> typing.Opt
 
       return None
 
+  @staticmethod
+  def set(ttml_element, begin):
+    value = begin.numerator / begin.denominator
+    ttml_element.set(BeginAttribute.qn, f"{value}s")
+
 
 class EndAttribute:
   '''end attributes
@@ -320,6 +343,11 @@ def extract(context: TemporalAttributeParsingContext, xml_element) -> typing.Opt
 
       return None
 
+  @staticmethod
+  def set(ttml_element, end):
+    value = end.numerator / end.denominator
+    ttml_element.set(EndAttribute.qn, f"{value}s")
+
 class DurAttribute:
   '''dur attributes
   '''
@@ -340,6 +368,11 @@ def extract(context: TemporalAttributeParsingContext, xml_element) -> typing.Opt
 
       return None
 
+  @staticmethod
+  def set(ttml_element, dur):
+    ttml_element.set(DurAttribute.qn, dur)
+
+
 class TimeContainer(Enum):
   par = "par"
   seq = "seq"
@@ -382,4 +415,4 @@ def extract(xml_element) -> typing.List[str]:
 
     raw_value = xml_element.attrib.get(StyleAttribute.qn)
 
-    return raw_value.split(" ") if raw_value is not None else []
+    return raw_value.split(" ") if raw_value is not None else []