Added changes to understand alignment metadata for each cells.

nbconvert/templates/align_reveal_cells.tpl

@@ -0,0 +1,17 b''
+{%- extends 'reveal_cells.tpl' -%}
+
+
+
+{%- block any_cell scoped -%}
+{%- if cell.metadata.align_type in ['Left'] -%}  
+    {{ super() }}
+{%- elif cell.metadata.align_type in ['center'] -%}
+    <div style="text-align:center">
+    {{ super() }}
+    </div>
+{%- elif cell.metadata.align_type in ['right'] -%}
+    <div style="text-align:right">
+    {{ super() }}
+    </div>
+{%- endif -%}   
+{%- endblock any_cell -%}

nbconvert/templates/subslides.tpl

@@ -1,4 +1,4 b''
-{%- extends 'reveal_cells.tpl' -%}
+{%- extends 'align_reveal_cells.tpl' -%}
 
 
 

nbconvert/transformers/revealhelp.py

@@ -38,6 +38,7 b' class RevealHelpTransformer(ConfigurableTransformer):'
             for i, cell in enumerate(worksheet.cells):
 
                 #Make sure the cell has slideshow metadata.
+                cell.metadata.align_type = cell.get('metadata', {}).get('slideshow', {}).get('align_type', 'Left')
                 cell.metadata.slide_type = cell.get('metadata', {}).get('slideshow', {}).get('slide_type', '-')
 
                 #Get the slide type.  If type is start of subslide or slide,