ODT Writer: Figure captions

Works pretty much the same as Word writer.

Following styles are used for figures:

Figure -- for figure with empty caption
FigureWithCaption (based on Figure) -- for figure with caption
FigureCaption (based on Caption) -- for figure captions

Also, TableCaption (based on Caption) is used for table captions.

We need FigureWithCaption to set keepWithNext, in order to keep caption
with figure.

3 files changed, 29 insertions, 4 deletions

diff --git a/data/odt/styles.xml b/data/odt/styles.xml
index ac0cbd742..32b918406 100644
--- a/data/odt/styles.xml
+++ b/data/odt/styles.xml
@@ -133,6 +133,22 @@ xmlns:css3t="http://www.w3.org/TR/css3-text/" office:version="1.2">
       style:font-size-complex="12pt"
       style:font-style-complex="italic" />
     </style:style>
+    <style:style style:name="TableCaption" style:family="paragraph"
+    style:parent-style-name="Caption" style:class="extra">
+    </style:style>
+    <style:style style:name="FigureCaption" style:family="paragraph"
+    style:parent-style-name="Caption" style:class="extra">
+    </style:style>
+    <style:style style:name="Figure" style:family="paragraph"
+    style:parent-style-name="Standard" style:class="extra">
+      <style:paragraph-properties text:number-lines="false"
+      text:line-number="0" />
+    </style:style>
+    <style:style style:name="FigureWithCaption" style:family="paragraph"
+    style:parent-style-name="Figure" style:class="extra">
+      <style:paragraph-properties text:number-lines="false"
+      text:line-number="0" fo:keep-with-next="always" />
+    </style:style>
     <style:style style:name="Index" style:family="paragraph"
     style:parent-style-name="Standard" style:class="index">
       <style:paragraph-properties text:number-lines="false"
diff --git a/src/Text/Pandoc/Writers/ODT.hs b/src/Text/Pandoc/Writers/ODT.hs
index 2a4129512..81bbdaf3f 100644
--- a/src/Text/Pandoc/Writers/ODT.hs
+++ b/src/Text/Pandoc/Writers/ODT.hs
@@ -127,7 +127,7 @@ writeODT opts doc@(Pandoc meta _) = do
   return $ fromArchive archive''
 
 transformPicMath :: WriterOptions -> IORef [Entry] -> Inline -> IO Inline
-transformPicMath opts entriesRef (Image lab (src,_)) = do
+transformPicMath opts entriesRef (Image lab (src,t)) = do
   res <- fetchItem' (writerMediaBag opts) (writerSourceURL opts) src
   case res of
      Left (_ :: E.SomeException) -> do
@@ -145,7 +145,9 @@ transformPicMath opts entriesRef (Image lab (src,_)) = do
        epochtime <- floor `fmap` getPOSIXTime
        let entry = toEntry newsrc epochtime $ toLazy img
        modifyIORef entriesRef (entry:)
-       return $ Image lab (newsrc, tit')
+       let fig | "fig:" `isPrefixOf` t = "fig:"
+               | otherwise             = ""
+       return $ Image lab (newsrc, fig++tit')
 transformPicMath _ entriesRef (Math t math) = do
   entries <- readIORef entriesRef
   let dt = if t == InlineMath then DisplayInline else DisplayBlock
diff --git a/src/Text/Pandoc/Writers/OpenDocument.hs b/src/Text/Pandoc/Writers/OpenDocument.hs
index 865b7fb35..aee656413 100644
--- a/src/Text/Pandoc/Writers/OpenDocument.hs
+++ b/src/Text/Pandoc/Writers/OpenDocument.hs
@@ -288,6 +288,8 @@ blockToOpenDocument o bs
     | Plain          b <- bs = if null b
                                   then return empty
                                   else inParagraphTags =<< inlinesToOpenDocument o b
+    | Para [Image c (s,'f':'i':'g':':':t)] <- bs
+                             = figure c s t
     | Para           b <- bs = if null b
                                   then return empty
                                   else inParagraphTags =<< inlinesToOpenDocument o b
@@ -334,7 +336,7 @@ blockToOpenDocument o bs
         mapM_ addParaStyle . newPara $ paraHStyles ++ paraStyles
         captionDoc <- if null c
                       then return empty
-                      else withParagraphStyle o "Caption" [Para c]
+                      else withParagraphStyle o "TableCaption" [Para c]
         th <- if all null h
                  then return empty
                  else colHeadsToOpenDocument o name (map fst paraHStyles) h
@@ -342,6 +344,12 @@ blockToOpenDocument o bs
         return $ inTags True "table:table" [ ("table:name"      , name)
                                            , ("table:style-name", name)
                                            ] (vcat columns $$ th $$ vcat tr) $$ captionDoc
+      figure caption source title | null caption =
+        withParagraphStyle o "Figure" [Para [Image caption (source,title)]]
+                                  | otherwise    = do
+        imageDoc <- withParagraphStyle o "FigureWithCaption" [Para [Image caption (source,title)]]
+        captionDoc <- withParagraphStyle o "FigureCaption" [Para caption]
+        return $ imageDoc $$ captionDoc
 
 colHeadsToOpenDocument :: WriterOptions -> String -> [String] -> [[Block]] -> State WriterState Doc
 colHeadsToOpenDocument o tn ns hs =
@@ -553,4 +561,3 @@ textStyleAttr s
                     ,("style:font-name-asian"        ,"Courier New")
                     ,("style:font-name-complex"      ,"Courier New")]
     | otherwise   = []
-