Fix #1657. Implement "--ignore-tables" option for oeb2mobi.

src/calibre/ebooks/mobi/mobiml.py

@@ -79,6 +79,9 @@ class FormatState(object):
 
 
 class MobiMLizer(object):
+    def __init__(self, ignore_tables=False):
+        self.ignore_tables = ignore_tables
+    
     def transform(self, oeb, context):
         oeb.logger.info('Converting XHTML to Mobipocket markup...')
         self.oeb = oeb
@@ -341,6 +344,8 @@ class MobiMLizer(object):
             tag = 'tr'
         elif display == 'table-cell':
             tag = 'td'
+        if tag in TABLE_TAGS and self.ignore_tables:
+            tag = 'span' if tag == 'td' else 'div'
         if tag in TABLE_TAGS:
             for attr in ('rowspan', 'colspan'):
                 if attr in elem.attrib:

src/calibre/ebooks/mobi/writer.py

@@ -524,6 +524,10 @@ def config(defaults=None):
         help=_('Modify images to meet Palm device size limitations.'))
     mobi('toc_title', ['--toc-title'], default=None, 
          help=_('Title for any generated in-line table of contents.'))
+    mobi('ignore_tables', ['--ignore-tables'], default=False,
+         help=_('Render HTML tables as blocks of text instead of actual '
+                'tables. This is neccessary if the HTML contains very large '
+                'or complex tables.'))
     profiles = c.add_group('profiles', _('Device renderer profiles. '
         'Affects conversion of font sizes, image rescaling and rasterization '
         'of tables. Valid profiles are: %s.') % ', '.join(_profiles))
@@ -581,7 +585,7 @@ def oeb2mobi(opts, inpath):
     rasterizer.transform(oeb, context)
     trimmer = ManifestTrimmer()
     trimmer.transform(oeb, context)
-    mobimlizer = MobiMLizer()
+    mobimlizer = MobiMLizer(ignore_tables=opts.ignore_tables)
     mobimlizer.transform(oeb, context)
     writer = MobiWriter(compression=compression, imagemax=imagemax)
     writer.dump(oeb, outpath)