Support all ODS units for creating schedules (e.g. LibreOffice and Microsoft Excel have different defaults from a quick test)

src/ifcblenderexport/blenderbim/bim/scheduler.py

@@ -33,7 +33,7 @@ class Scheduler():
                 if not style_name or 'column-width' not in styles[style_name]:
                     column_widths.append(50)
                 else:
-                    column_widths.append(self.convert_to_si(styles[style_name]['column-width']))
+                    column_widths.append(self.convert_to_mm(styles[style_name]['column-width']))
 
         y = self.margin
         for tri, tr in enumerate(table.getElementsByType(TableRow)):
@@ -67,6 +67,28 @@ class Scheduler():
             'dominant-baseline': 'hanging'
         }))
 
-    def convert_to_si(self, value):
-        if 'in' in value:
+    def convert_to_mm(self, value):
+        # XSL is what defines the units of measurements in ODF
+        # https://docs.oasis-open.org/office/v1.2/os/OpenDocument-v1.2-os-part1.html#datatype-positiveLength
+        # https://www.w3.org/TR/2001/REC-xsl-20011015/slice5.html#section-N8185-Definitions-of-Units-of-Measure
+        if 'cm' in value:
+            return float(value[0:-2]) * 10
+        elif 'mm' in value:
+            return float(value[0:-2])
+        elif 'in' in value:
             return float(value[0:-2]) * 25.4
+        elif 'pt' in value:
+            return float(value[0:-2]) * (1/72) * 25.4
+        elif 'pc' in value:
+            return float(value[0:-2]) * 12 * (1/72) * 25.4
+        elif 'px' in value:
+            # implementors may instead simply pick a fixed conversion factor,
+            # treating 'px' as an absolute unit of measurement (such as 1/92" or
+            # 1/72"). <-- We're picking 1/96 to match SVG. Let me know if it
+            # breaks anything.
+            return float(value[0:-2]) * (1/96) * 2.54 * 10
+        elif 'em' in value:
+            # This is a funny one. Since the scheduler at the moment enforces a
+            # font size of 2.5mm (vertically, FWIW), I'm writing this. Hopefully
+            # this code doesn't hurt anybody.
+            return float(value[0:-2]) * (1/96) * 2.54 * 10

src/ifcblenderexport/blenderbim/bim/sheeter.py

@@ -209,6 +209,10 @@ class SheetBuilder:
         return group
 
     def convert_to_mm(self, value):
+        # CSS is what defines these possibilities
+        # https://www.w3.org/TR/SVG/refs.html#ref-css-values-3
+        # https://www.w3.org/TR/css-values-3/#absolute-lengths
+        # The relative units are not implemented. Go fish.
         if 'cm' in value:
             return float(value[0:-2]) * 10
         elif 'mm' in value: