Textile reader: Improved table support.

We can now handle all different alignment types, for simple
tables only (no captions, no relative widths, cell contents just
plain inlines).  Other tables are still handled using raw HTML.

Addresses #1585 as far as it can be addresssed, I believe.

src/Text/Pandoc/Writers/Textile.hs

@@ -39,6 +39,7 @@ import Text.Pandoc.Templates (renderTemplate')
 import Text.Pandoc.XML ( escapeStringForXML )
 import Data.List ( intercalate )
 import Control.Monad.State
+import Control.Applicative ((<$>))
 import Data.Char ( isSpace )
 
 data WriterState = WriterState {
@@ -164,14 +165,22 @@ blockToTextile opts (BlockQuote blocks) = do
   return $ "<blockquote>\n\n" ++ contents ++ "\n</blockquote>\n"
 
 blockToTextile opts (Table [] aligns widths headers rows') |
-         all (==0) widths && all (`elem` [AlignLeft,AlignDefault]) aligns = do
+         all (==0) widths = do
   hs <- mapM (liftM (("_. " ++) . stripTrailingNewlines) . blockListToTextile opts) headers
   let cellsToRow cells = "|" ++ intercalate "|" cells ++ "|"
-  let header = if all null headers then "" else cellsToRow hs
-  let rowToCells = mapM (liftM stripTrailingNewlines . blockListToTextile opts)
+  let header = if all null headers then "" else cellsToRow hs ++ "\n"
+  let blocksToCell (align, bs) = do
+        contents <- stripTrailingNewlines <$> blockListToTextile opts bs
+        let alignMarker = case align of
+                               AlignLeft    -> "<. "
+                               AlignRight   -> ">. "
+                               AlignCenter  -> "=. "
+                               AlignDefault -> ""
+        return $ alignMarker ++ contents
+  let rowToCells = mapM blocksToCell . zip aligns
   bs <- mapM rowToCells rows'
   let body = unlines $ map cellsToRow bs
-  return $ header ++ "\n" ++ body ++ "\n"
+  return $ header ++ body
 
 blockToTextile opts (Table capt aligns widths headers rows') = do
   let alignStrings = map alignmentToString aligns

tests/tables.textile

@@ -34,36 +34,10 @@ Simple table with caption:
 
 Simple table without caption:
 
-<table>
-<thead>
-<tr class="header">
-<th align="right">Right</th>
-<th align="left">Left</th>
-<th align="center">Center</th>
-<th align="left">Default</th>
-</tr>
-</thead>
-<tbody>
-<tr class="odd">
-<td align="right">12</td>
-<td align="left">12</td>
-<td align="center">12</td>
-<td align="left">12</td>
-</tr>
-<tr class="even">
-<td align="right">123</td>
-<td align="left">123</td>
-<td align="center">123</td>
-<td align="left">123</td>
-</tr>
-<tr class="odd">
-<td align="right">1</td>
-<td align="left">1</td>
-<td align="center">1</td>
-<td align="left">1</td>
-</tr>
-</tbody>
-</table>
+|_. Right|_. Left|_. Center|_. Default|
+|>. 12|<. 12|=. 12|12|
+|>. 123|<. 123|=. 123|123|
+|>. 1|<. 1|=. 1|1|
 
 Simple table indented two spaces:
 
@@ -164,28 +138,9 @@ Multiline table without caption:
 
 Table without column headers:
 
-<table>
-<tbody>
-<tr class="odd">
-<td align="right">12</td>
-<td align="left">12</td>
-<td align="center">12</td>
-<td align="right">12</td>
-</tr>
-<tr class="even">
-<td align="right">123</td>
-<td align="left">123</td>
-<td align="center">123</td>
-<td align="right">123</td>
-</tr>
-<tr class="odd">
-<td align="right">1</td>
-<td align="left">1</td>
-<td align="center">1</td>
-<td align="right">1</td>
-</tr>
-</tbody>
-</table>
+|>. 12|<. 12|=. 12|>. 12|
+|>. 123|<. 123|=. 123|>. 123|
+|>. 1|<. 1|=. 1|>. 1|
 
 Multiline table without column headers: