Added TikiWiki reader (#3800)

Added TikiWiki reader, including tests and documentation.

It's probably not *complete*, but it works pretty well, handles all
the basics (and some not-so-basics).

3 files changed, 281 insertions, 0 deletions

diff --git a/test/Tests/Old.hs b/test/Tests/Old.hs
index b807719bc..c4dd4d322 100644
--- a/test/Tests/Old.hs
+++ b/test/Tests/Old.hs
@@ -137,6 +137,9 @@ tests = [ testGroup "markdown"
         , testGroup "twiki"
           [ test "reader" ["-r", "twiki", "-w", "native", "-s"]
               "twiki-reader.twiki" "twiki-reader.native" ]
+        , testGroup "tikiwiki"
+          [ test "reader" ["-r", "tikiwiki", "-w", "native", "-s"]
+              "tikiwiki-reader.tikiwiki" "tikiwiki-reader.native" ]
         , testGroup "other writers" $ map (\f -> testGroup f $ writerTests f)
           [ "opendocument" , "context" , "texinfo", "icml", "tei"
           , "man" , "plain" , "rtf", "org", "asciidoc", "zimwiki"
diff --git a/test/tikiwiki-reader.native b/test/tikiwiki-reader.native
new file mode 100644
index 000000000..2ab053217
--- /dev/null
+++ b/test/tikiwiki-reader.native
@@ -0,0 +1,130 @@
+Pandoc (Meta {unMeta = fromList []})
+[Header 1 ("header",[],[]) [Str "header"]
+,Header 2 ("header-level-two",[],[]) [Str "header",Space,Str "level",Space,Str "two"]
+,Header 3 ("header-level-3",[],[]) [Str "header",Space,Str "level",Space,Str "3"]
+,Header 4 ("header-_level_-four",[],[]) [Str "header",Space,Str "_level_",Space,Str "four"]
+,Header 5 ("header-level-5",[],[]) [Str "header",Space,Str "level",Space,Str "5"]
+,Header 6 ("header-level-6",[],[]) [Str "header",Space,Str "level",Space,Str "6"]
+,Para [Str "!!!!!!!",Space,Str "not",Space,Str "a",Space,Str "header"]
+,Para [Str "--++",Space,Str "not",Space,Str "a",Space,Str "header"]
+,Header 1 ("emph-and-strong",[],[]) [Str "emph",Space,Str "and",Space,Str "strong"]
+,Para [Emph [Str "emph"],Space,Strong [Str "strong"]]
+,Para [Emph [Strong [Str "strong",Space,Str "and",Space,Str "emph",Space,Str "1"]]]
+,Para [Strong [Emph [Str "strong",Space,Str "and",Space,Str "emph",Space,Str "2"]]]
+,Para [Strong [Emph [Str "emph",Space,Str "inside"],Space,Str "strong"]]
+,Para [Strong [Str "strong",Space,Str "with",Space,Emph [Str "emph"]]]
+,Para [Emph [Strong [Str "strong",Space,Str "inside"],Space,Str "emph"]]
+,Header 1 ("horizontal-rule",[],[]) [Str "horizontal",Space,Str "rule"]
+,Para [Str "top"]
+,HorizontalRule
+,Para [Str "bottom"]
+,HorizontalRule
+,Header 1 ("nop",[],[]) [Str "nop"]
+,Para [Str "__not emph__"]
+,Header 1 ("entities",[],[]) [Str "entities"]
+,Para [Str "hi",Space,Str "&",Space,Str "low"]
+,Para [Str "hi",Space,Str "&",Space,Str "low"]
+,Para [Str "G\246del"]
+,Para [Str "\777\2730"]
+,Header 1 ("linebreaks",[],[]) [Str "linebreaks"]
+,Para [Str "hi",LineBreak,Str "there"]
+,Para [Str "hi",LineBreak,Str "there"]
+,Header 1 ("inline-code",[],[]) [Str "inline",Space,Str "code"]
+,Para [Code ("",[],[]) "*\8594*",Space,Code ("",[],[]) "typed",Space,Code ("",[],[]) ">>="]
+,Header 1 ("code-blocks",[],[]) [Str "code",Space,Str "blocks"]
+,CodeBlock ("",[],[]) "\ncase xs of\n     (_:_) -> reverse xs\n     []    -> ['*']\n"
+,CodeBlock ("",["haskell"],[("colors","haskell"),("ln","0")]) "\ncase xs of\n     (_:_) -> reverse xs\n     []    -> ['*']\n"
+,Header 1 ("external-links",[],[]) [Str "external",Space,Str "links"]
+,Para [Link ("",[],[]) [Emph [Str "Google"],Space,Str "search",Space,Str "engine"] ("http://google.com","")]
+,Para [Link ("",[],[]) [Str "http://pandoc.org"] ("http://pandoc.org","")]
+,Para [Link ("",[],[]) [Str "http://google.com"] ("http://google.com",""),Space,Link ("",[],[]) [Str "http://yahoo.com"] ("http://yahoo.com","")]
+,Para [Link ("",[],[]) [Str "email",Space,Str "me"] ("mailto:info@example.org","")]
+,Para [Str "http://google.com"]
+,Para [Str "info@example.org"]
+,Header 1 ("lists",[],[]) [Str "lists"]
+,BulletList
+ [[Plain [Str "Start",Space,Str "each",Space,Str "line",Space]]
+ ,[Plain [Str "with",Space,Str "an",Space,Str "asterisk",Space,Str "(*).",Space]
+  ,BulletList
+   [[Plain [Str "More",Space,Str "asterisks",Space,Str "gives",Space,Str "deeper",Space]
+    ,BulletList
+     [[Plain [Str "and",Space,Str "deeper",Space,Str "levels.",Space]]]]]]
+ ,[Plain [Str "Line",Space,Str "breaks",LineBreak,Str "don't",Space,Str "break",Space,Str "levels.",Space]]
+ ,[Plain [Str "Continuations",Space,Str "are",Space,Str "also",Space,Str "possible",Space]
+  ,BulletList
+   [[Plain [Str "and",Space,Str "do",Space,Str "not",Space,Str "break",Space,Str "the",Space,Str "list",Space,Str "flow",Space]]]]
+ ,[Plain [Str "Level",Space,Str "one",Space]]]
+,Para [Str "Any",Space,Str "other",Space,Str "start",Space,Str "ends",Space,Str "the",Space,Str "list."]
+,OrderedList (1,DefaultStyle,DefaultDelim)
+ [[Plain [Str "Start",Space,Str "each",Space,Str "line",Space]]
+ ,[Plain [Str "with",Space,Str "a",Space,Str "number",Space,Str "(1.).",Space]
+  ,OrderedList (1,DefaultStyle,DefaultDelim)
+   [[Plain [Str "More",Space,Str "number",Space,Str "signs",Space,Str "gives",Space,Str "deeper",Space]
+    ,OrderedList (1,DefaultStyle,DefaultDelim)
+     [[Plain [Str "and",Space,Str "deeper",Space]]
+     ,[Plain [Str "levels.",Space]]]]]]
+ ,[Plain [Str "Line",Space,Str "breaks",LineBreak,Str "don't",Space,Str "break",Space,Str "levels.",Space]]
+ ,[Plain [Str "Blank",Space,Str "lines",Space]]]
+,OrderedList (1,DefaultStyle,DefaultDelim)
+ [[Plain [Str "end",Space,Str "the",Space,Str "list",Space,Str "and",Space,Str "start",Space,Str "another.",Space]]]
+,Para [Str "Any",Space,Str "other",Space,Str "start",Space,Str "also",Space,Str "ends",Space,Str "the",Space,Str "list."]
+,DefinitionList
+ [([Str "item",Space,Str "1"],
+   [[Plain [Str "definition",Space,Str "1",Space]]])
+ ,([Str "item",Space,Str "2"],
+   [[Plain [Str "definition",Space,Str "2-1",Space,Str "definition",Space,Str "2-2",Space]]])
+ ,([Str "item",Space,Emph [Str "3"]],
+   [[Plain [Str "definition",Space,Emph [Str "3"],Space]]])]
+,OrderedList (1,DefaultStyle,DefaultDelim)
+ [[Plain [Str "one",Space]]
+ ,[Plain [Str "two",Space]
+  ,BulletList
+   [[Plain [Str "two",Space,Str "point",Space,Str "one",Space]]
+   ,[Plain [Str "two",Space,Str "point",Space,Str "two",Space]]]]
+ ,[Plain [Str "three",Space]]
+ ,[Plain [Str "four",Space]]
+ ,[Plain [Str "five",Space]
+  ,OrderedList (1,DefaultStyle,DefaultDelim)
+   [[Plain [Str "five",Space,Str "sub",Space,Str "1",Space]
+    ,OrderedList (1,DefaultStyle,DefaultDelim)
+     [[Plain [Str "five",Space,Str "sub",Space,Str "1",Space,Str "sub",Space,Str "1",Space]]]]
+   ,[Plain [Str "five",Space,Str "sub",Space,Str "2",Space]]]]]
+,Header 1 ("tables",[],[]) [Str "tables"]
+,Table [] [AlignDefault,AlignDefault] [0.0,0.0]
+ [[Plain [Str ""]]
+ ,[Plain [Str ""]]]
+ [[[Plain [Str "Orange"]]
+  ,[Plain [Str "Apple"]]]
+ ,[[Plain [Str "Bread"]]
+  ,[Plain [Str "Pie"]]]
+ ,[[Plain [Str "Butter"]]
+  ,[Plain [Str "Ice",Space,Str "cream"]]]]
+,Table [] [AlignDefault,AlignDefault] [0.0,0.0]
+ [[Plain [Str ""]]
+ ,[Plain [Str ""]]]
+ [[[Plain [Str "Orange"]]
+  ,[Plain [Str "Apple"]]]
+ ,[[Plain [Str "Bread"]]
+  ,[Plain [Str "Pie"]]]
+ ,[[Plain [Strong [Str "Butter"]]]
+  ,[Plain [Str "Ice",Space,Str "cream"]]]]
+,Table [] [AlignDefault,AlignDefault] [0.0,0.0]
+ [[Plain [Str ""]]
+ ,[Plain [Str ""]]]
+ [[[Plain [Str "Orange"]]
+  ,[Plain [Str "Apple"]]]
+ ,[[Plain [Str "Bread",LineBreak,LineBreak,Str "and",Space,Str "cheese"]]
+  ,[Plain [Str "Pie",LineBreak,LineBreak,Strong [Str "apple"],Space,Str "and",Space,Emph [Str "carrot"],Space]]]]
+,Table [] [AlignDefault,AlignDefault,AlignDefault] [0.0,0.0,0.0]
+ [[Plain [Str ""]]
+ ,[Plain [Str ""]]
+ ,[Plain [Str ""]]]
+ [[[Plain [Space,Str "Orange",Space]]
+  ,[Plain [Space,Str "Apple",Space]]
+  ,[Plain [Space,Str "more"]]]
+ ,[[Plain [Space,Str "Bread",Space]]
+  ,[Plain [Space,Str "Pie",Space]]
+  ,[Plain [Space,Str "more"]]]
+ ,[[Plain [Space,Str "Butter",Space]]
+  ,[Plain [Space,Str "Ice",Space,Str "cream",Space]]
+  ,[Plain [Space,Str "and",Space,Str "more",Space]]]]]
diff --git a/test/tikiwiki-reader.tikiwiki b/test/tikiwiki-reader.tikiwiki
new file mode 100644
index 000000000..d1971feb1
--- /dev/null
+++ b/test/tikiwiki-reader.tikiwiki
@@ -0,0 +1,148 @@
+! header
+
+!! header level two
+
+!!! header level 3
+
+!!!! header _level_ four
+
+!!!!! header level 5
+
+!!!!!! header level 6
+
+!!!!!!! not a header
+
+ --++ not a header
+
+! emph and strong
+
+''emph'' __strong__
+
+''__strong and emph 1__''
+
+__''strong and emph 2''__
+
+__''emph inside'' strong__
+
+__strong with ''emph''__
+
+''__strong inside__ emph''
+
+! horizontal rule
+
+top
+----
+bottom
+
+----
+
+! nop
+
+~np~__not emph__~/np~
+
+! entities
+
+hi & low
+
+hi & low
+
+Gödel
+
+̉પ
+
+! linebreaks
+
+hi%%%there
+
+hi%%%
+there
+
+! inline code
+
+-+*→*+- -+typed+- -+>>=+-
+
+! code blocks
+
+{CODE()}
+case xs of
+     (_:_) -> reverse xs
+     []    -> ['*']
+{CODE}
+
+{CODE(colors="haskell" ln=0)}
+case xs of
+     (_:_) -> reverse xs
+     []    -> ['*']
+{CODE}
+
+! external links
+
+[http://google.com|''Google'' search engine]
+
+[http://pandoc.org]
+
+[http://google.com] [http://yahoo.com]
+
+[mailto:info@example.org|email me]
+
+http://google.com
+
+info@example.org
+
+! lists
+
+* Start each line
+* with an asterisk (*).
+** More asterisks gives deeper
+*** and deeper levels.
+* Line breaks%%%don't break levels.
+* Continuations
++ are also possible
+** and do not break the list flow
+* Level one
+Any other start ends the list.
+
+# Start each line
+# with a number (1.).
+## More number signs gives deeper
+### and deeper
+### levels.
+# Line breaks%%%don't break levels.
+# Blank lines
+
+# end the list and start another.
+Any other start also
+ends the list.
+
+;item 1: definition 1
+;item 2: definition 2-1
++ definition 2-2
+;item ''3'': definition ''3''
+
+# one
+# two
+** two point one
+** two point two
+# three
+# four
+# five
+## five sub 1
+### five sub 1 sub 1
+## five sub 2
+
+! tables
+
+||Orange|Apple
+Bread|Pie
+Butter|Ice cream||
+
+||Orange|Apple
+Bread|Pie
+__Butter__|Ice cream||
+
+||Orange|Apple
+Bread%%%%%%and cheese|Pie%%%%%%__apple__ and ''carrot'' ||
+
+|| Orange | Apple     | more
+ Bread  | Pie       | more
+ Butter | Ice cream | and more ||