From 7b4c1b171c1d7bb542b464160e010a2118ed0fe5 Mon Sep 17 00:00:00 2001
From: John MacFarlane <jgm@berkeley.edu>
Date: Sun, 24 Jul 2011 11:36:54 -0700
Subject: Use data: protocol to embed s5 css in <link> tags.

Using inline css didn't work properly with Chrome and Safari.
---
 src/Text/Pandoc/S5.hs | 27 ++++++++++++++++-----------
 1 file changed, 16 insertions(+), 11 deletions(-)

(limited to 'src/Text/Pandoc')

diff --git a/src/Text/Pandoc/S5.hs b/src/Text/Pandoc/S5.hs
index 5658433ae..b17b052c5 100644
--- a/src/Text/Pandoc/S5.hs
+++ b/src/Text/Pandoc/S5.hs
@@ -31,6 +31,8 @@ Definitions for creation of S5 powerpoint-like HTML.
 module Text.Pandoc.S5 ( s5HeaderIncludes) where
 import Text.Pandoc.Shared ( readDataFile )
 import System.FilePath ( (</>) )
+import Data.ByteString.UTF8 ( toString, fromString )
+import Data.ByteString.Base64 ( encode )
 
 s5HeaderIncludes :: Maybe FilePath -> IO String
 s5HeaderIncludes datadir = do
@@ -38,14 +40,17 @@ s5HeaderIncludes datadir = do
   j <- s5Javascript datadir
   return $ c ++ j
 
-inCDATA :: String -> String
-inCDATA s = "/*<![CDATA[*/\n" ++ s ++ "\n/*]]>*/\n"
-
 s5Javascript :: Maybe FilePath -> IO String
 s5Javascript datadir = do
   js <- readDataFile datadir $ "s5" </> "default" </> "slides.min.js"
   return $ "<script type=\"text/javascript\">\n" ++ inCDATA js ++ "</script>\n"
 
+inCDATA :: String -> String
+inCDATA s = "/*<![CDATA[*/\n" ++ s ++ "\n/*]]>*/\n"
+
+base64 :: String -> String
+base64 = toString . encode . fromString
+
 s5CSS :: Maybe FilePath -> IO String
 s5CSS datadir = do
   s5CoreCSS <- readDataFile datadir $ "s5" </> "default" </> "s5-core.css"
@@ -54,11 +59,11 @@ s5CSS datadir = do
   s5OperaCSS <- readDataFile datadir $ "s5" </> "default" </> "opera.css"
   s5OutlineCSS <- readDataFile datadir $ "s5" </> "default" </> "outline.css"
   s5PrintCSS <- readDataFile datadir $ "s5" </> "default" </> "print.css"
-  return $ "<style type=\"text/css\" media=\"projection\" id=\"slideProj\">\n" ++
-          inCDATA (s5CoreCSS ++ "\n" ++ s5FramingCSS ++ "\n" ++ s5PrettyCSS) ++
-          "</style>\n<style type=\"text/css\" media=\"screen\" id=\"outlineStyle\">\n" ++
-          inCDATA s5OutlineCSS ++
-          "</style>\n<style type=\"text/css\" media=\"print\" id=\"slidePrint\">\n" ++
-          inCDATA s5PrintCSS ++
-          "</style>\n<style type=\"text/css\" media=\"projection\" id=\"operaFix\">\n" ++
-          inCDATA s5OperaCSS ++ "</style>\n"
+  return $ "<link rel=\"stylesheet\" type=\"text/css\" media=\"projection\" id=\"slideProj\" href=\"data:text/css;charset=utf-8;base64," ++
+          base64 (s5CoreCSS ++ "\n" ++ s5FramingCSS ++ "\n" ++ s5PrettyCSS) ++ "\" />\n" ++
+          "<link rel=\"stylesheet\" type=\"text/css\" media=\"screen\" id=\"outlineStyle\" href=\"data:text/css;charset=utf-8;base64," ++
+          base64 s5OutlineCSS ++ "\" />\n" ++
+          "<link rel=\"stylesheet\" type=\"text/css\" media=\"print\" id=\"slidePrint\" href=\"data:text/css;charset=utf-8;base64," ++
+          base64 s5PrintCSS ++ "\" />\n" ++
+          "<link rel=\"stylesheet\" type=\"text/css\" media=\"projection\" id=\"operaFix\" href=\"data:text/css;charset=utf-8;base64," ++
+          base64 s5OperaCSS ++ "\" />\n"
-- 
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