Add "minimal mode" to OML generator, omitting additional XML attributes and non-text nodes

src/xopp2oml/template.oml

@@ -1,12 +1,17 @@
 // Warning: Generated code! Do not edit!
 // Input file: '{{inputfile}}'
 // Generator: https://msdl.uantwerpen.be/git/jexelmans/xopp2py
+{%- if minimal %}
+// Minimal mode enabled: All XML attributes and non-text nodes are omitted.
+{%- endif %}
 
 description <{{namespaces.description}}#> as {{namespaces.shorthand}} {
 
   uses <{{namespaces.xopp}}#> as xopp
   uses <{{namespaces.object_diagram}}#> as object_diagram
+  {%- if not minimal %}
   uses <{{namespaces.dict}}#> as dict
+  {%- endif %}
 
   ci model : xopp:Model []
 
@@ -20,7 +25,8 @@ description <{{namespaces.description}}#> as {{namespaces.shorthand}} {
     object_diagram:inModel model
   ]
 
-  {% for page_index, page in enumerate(file.pages) %}
+  {%- for page_index, page in enumerate(file.pages) %}
+
   ci p{{page_index}} : xopp:Page [
     xopp:hasWidth {{ page.width }}
     xopp:hasHeight {{ page.height }}
@@ -32,27 +38,34 @@ description <{{namespaces.description}}#> as {{namespaces.shorthand}} {
   ]
 
   {%- for layer_index, layer in enumerate(page.layers) %}
+
   ci p{{page_index}}l{{layer_index}} : xopp:Layer [
     xopp:inPage p{{page_index}}
     object_diagram:inModel model
   ]
 
   {%- for el_index, el in enumerate(layer.elements) %}
+  {%- if not minimal or el.__class__.__name__ == "Text" %}
+
   ci p{{page_index}}l{{layer_index}}e{{el_index}} : xopp:{{el.__class__.__name__}} [
     xopp:hasText {{el.text | to_oml_string_literal}}
     xopp:inLayer p{{page_index}}l{{layer_index}}
     object_diagram:inModel model
   ]
 
+  {%- if not minimal %}
   {%- for key, value in el.attributes.items() %}
+
   ci p{{page_index}}l{{layer_index}}e{{el_index}}a{{loop.index}} : xopp:XMLAttribute [
     dict:hasKey {{key | to_oml_string_literal}}
     dict:hasValue {{value | to_oml_string_literal}}
     xopp:ofLayerElement p{{page_index}}l{{layer_index}}e{{el_index}}
     object_diagram:inModel model
   ]
-        {% endfor %}
-      {% endfor %}
-    {% endfor %}
-  {% endfor %}
+  {%- endfor %}
+  {%- endif %}
+  {%- endif %}
+  {%- endfor %}
+  {%- endfor %}
+  {%- endfor %}
 }

src/xopp2oml/writer.py

@@ -44,6 +44,7 @@ def writeOML(xournalFile: abstract_syntax.XournalFile, inputfile:str, namespace:
 
     template = environment.get_template("template.oml")
     for piece in template.generate(
+        minimal=True,
         file=xournalFile,
         inputfile=inputfile,
         enumerate=enumerate,