Added plain writer.

Text.Pandoc.Writers.Markdown now exports a writePlain,
which writes plain text without links, pictures, or
special formatting (not even markdown conventions).

git-svn-id: https://pandoc.googlecode.com/svn/trunk@1907 788f1e2b-df1e-0410-8736-df70ead52e1b

4 files changed, 800 insertions, 22 deletions

diff --git a/tests/RunTests.hs b/tests/RunTests.hs
index b880a0627..0b5555ed1 100644
--- a/tests/RunTests.hs
+++ b/tests/RunTests.hs
@@ -52,6 +52,7 @@ writerFormats = [ "native"
                 , "context"
                 , "texinfo"
                 , "man"
+                , "plain"
                 , "markdown"
                 , "rst"
                 , "mediawiki"
diff --git a/tests/tables.plain b/tests/tables.plain
new file mode 100644
index 000000000..a605137d1
--- /dev/null
+++ b/tests/tables.plain
@@ -0,0 +1,79 @@
+Simple table with caption:
+
+    Right Left    Center  Default
+  ------- ------ -------- ---------
+       12 12        12    12
+      123 123      123    123
+        1 1         1     1
+  
+  Table: Demonstration of simple table syntax.
+
+Simple table without caption:
+
+    Right Left    Center  Default
+  ------- ------ -------- ---------
+       12 12        12    12
+      123 123      123    123
+        1 1         1     1
+
+Simple table indented two spaces:
+
+    Right Left    Center  Default
+  ------- ------ -------- ---------
+       12 12        12    12
+      123 123      123    123
+        1 1         1     1
+  
+  Table: Demonstration of simple table syntax.
+
+Multiline table with caption:
+
+  --------------------------------------------------------------
+   Centered   Left              Right Default aligned
+    Header    Aligned         Aligned
+  ----------- ---------- ------------ --------------------------
+     First    row                12.0 Example of a row that
+                                      spans multiple lines.
+  
+    Second    row                 5.0 Here's another one. Note
+                                      the blank line between
+                                      rows.
+  --------------------------------------------------------------
+  
+  Table: Here's the caption. It may span multiple lines.
+
+Multiline table without caption:
+
+  --------------------------------------------------------------
+   Centered   Left              Right Default aligned
+    Header    Aligned         Aligned
+  ----------- ---------- ------------ --------------------------
+     First    row                12.0 Example of a row that
+                                      spans multiple lines.
+  
+    Second    row                 5.0 Here's another one. Note
+                                      the blank line between
+                                      rows.
+  --------------------------------------------------------------
+
+Table without column headers:
+
+  ----- ----- ----- -----
+     12 12     12      12
+    123 123    123    123
+      1 1       1       1
+  ----- ----- ----- -----
+
+Multiline table without column headers:
+
+  ----------- ---------- ------------ --------------------------
+     First    row                12.0 Example of a row that
+                                      spans multiple lines.
+  
+    Second    row                 5.0 Here's another one. Note
+                                      the blank line between
+                                      rows.
+  ----------- ---------- ------------ --------------------------
+
+
+
diff --git a/tests/writer.markdown b/tests/writer.markdown
index cf476342c..1bc9b76f0 100644
--- a/tests/writer.markdown
+++ b/tests/writer.markdown
@@ -281,42 +281,42 @@ B. Williams
 Tight using spaces:
 
 apple
-:   red fruit
+  ~ red fruit
 orange
-:   orange fruit
+  ~ orange fruit
 banana
-:   yellow fruit
+  ~ yellow fruit
 
 Tight using tabs:
 
 apple
-:   red fruit
+  ~ red fruit
 orange
-:   orange fruit
+  ~ orange fruit
 banana
-:   yellow fruit
+  ~ yellow fruit
 
 Loose:
 
 apple
-:   red fruit
+  ~ red fruit
 
 orange
-:   orange fruit
+  ~ orange fruit
 
 banana
-:   yellow fruit
+  ~ yellow fruit
 
 
 Multiple blocks with italics:
 
 *apple*
-:   red fruit
+  ~ red fruit
 
     contains seeds, crisp, pleasant to taste
 
 *orange*
-:   orange fruit
+  ~ orange fruit
 
         { orange code block }
 
@@ -326,34 +326,34 @@ Multiple blocks with italics:
 Multiple definitions, tight:
 
 apple
-:   red fruit
-:   computer
+  ~ red fruit
+  ~ computer
 orange
-:   orange fruit
-:   bank
+  ~ orange fruit
+  ~ bank
 
 Multiple definitions, loose:
 
 apple
-:   red fruit
+  ~ red fruit
 
-:   computer
+  ~ computer
 
 orange
-:   orange fruit
+  ~ orange fruit
 
-:   bank
+  ~ bank
 
 
 Blank line after term, indented marker, alternate markers:
 
 apple
-:   red fruit
+  ~ red fruit
 
-:   computer
+  ~ computer
 
 orange
-:   orange fruit
+  ~ orange fruit
 
     1.  sublist
     2.  sublist
diff --git a/tests/writer.plain b/tests/writer.plain
new file mode 100644
index 000000000..27ed0add9
--- /dev/null
+++ b/tests/writer.plain
@@ -0,0 +1,698 @@
+Pandoc Test Suite
+John MacFarlane; Anonymous
+July 17, 2006
+
+This is a set of tests for pandoc. Most of them are adapted from
+John Gruber's markdown test suite.
+
+
+* * * * *
+
+Headers
+=======
+
+Level 2 with an embedded link
+-----------------------------
+
+Level 3 with emphasis
+
+Level 4
+
+Level 5
+
+Level 1
+=======
+
+Level 2 with emphasis
+---------------------
+
+Level 3
+
+with no blank line
+
+Level 2
+-------
+
+with no blank line
+
+
+* * * * *
+
+Paragraphs
+==========
+
+Here's a regular paragraph.
+
+In Markdown 1.0.0 and earlier. Version 8. This line turns into a
+list item. Because a hard-wrapped line in the middle of a paragraph
+looked like a list item.
+
+Here's one with a bullet. * criminey.
+
+There should be a hard line break  
+here.
+
+
+* * * * *
+
+Block Quotes
+============
+
+E-mail style:
+
+  This is a block quote. It is pretty short.
+
+  Code in a block quote:
+  
+      sub status {
+          print "working";
+      }
+  
+  A list:
+  
+  1.  item one
+  2.  item two
+  
+  Nested block quotes:
+  
+    nested
+  
+    nested
+
+This should not be a block quote: 2 > 1.
+
+And a following paragraph.
+
+
+* * * * *
+
+Code Blocks
+===========
+
+Code:
+
+    ---- (should be four hyphens)
+    
+    sub status {
+        print "working";
+    }
+    
+    this code block is indented by one tab
+
+And:
+
+        this code block is indented by two tabs
+    
+    These should not be escaped:  \$ \\ \> \[ \{
+
+
+* * * * *
+
+Lists
+=====
+
+Unordered
+---------
+
+Asterisks tight:
+
+-   asterisk 1
+-   asterisk 2
+-   asterisk 3
+
+Asterisks loose:
+
+-   asterisk 1
+
+-   asterisk 2
+
+-   asterisk 3
+
+
+Pluses tight:
+
+-   Plus 1
+-   Plus 2
+-   Plus 3
+
+Pluses loose:
+
+-   Plus 1
+
+-   Plus 2
+
+-   Plus 3
+
+
+Minuses tight:
+
+-   Minus 1
+-   Minus 2
+-   Minus 3
+
+Minuses loose:
+
+-   Minus 1
+
+-   Minus 2
+
+-   Minus 3
+
+
+Ordered
+-------
+
+Tight:
+
+1.  First
+2.  Second
+3.  Third
+
+and:
+
+1.  One
+2.  Two
+3.  Three
+
+Loose using tabs:
+
+1.  First
+
+2.  Second
+
+3.  Third
+
+
+and using spaces:
+
+1.  One
+
+2.  Two
+
+3.  Three
+
+
+Multiple paragraphs:
+
+1.  Item 1, graf one.
+
+    Item 1. graf two. The quick brown fox jumped over the lazy dog's
+    back.
+
+2.  Item 2.
+
+3.  Item 3.
+
+
+Nested
+------
+
+-   Tab
+    -   Tab
+        -   Tab
+
+
+
+Here's another:
+
+1.  First
+2.  Second:
+    -   Fee
+    -   Fie
+    -   Foe
+
+3.  Third
+
+Same thing but with paragraphs:
+
+1.  First
+
+2.  Second:
+
+    -   Fee
+    -   Fie
+    -   Foe
+
+3.  Third
+
+
+Tabs and spaces
+---------------
+
+-   this is a list item indented with tabs
+
+-   this is a list item indented with spaces
+
+    -   this is an example list item indented with tabs
+
+    -   this is an example list item indented with spaces
+
+
+
+Fancy list markers
+------------------
+
+(2) begins with 2
+(3) and now 3
+
+    with a continuation
+
+    iv. sublist with roman numerals, starting with 4
+    v.  more items
+        (A) a subsublist
+        (B) a subsublist
+
+
+
+Nesting:
+
+A.  Upper Alpha
+    I.  Upper Roman.
+        (6) Decimal start with 6
+            c)  Lower alpha with paren
+
+
+
+
+Autonumbering:
+
+1.  Autonumber.
+2.  More.
+    1.  Nested.
+
+
+Should not be a list item:
+
+M.A. 2007
+
+B. Williams
+
+
+* * * * *
+
+Definition Lists
+================
+
+Tight using spaces:
+
+apple
+    red fruit
+orange
+    orange fruit
+banana
+    yellow fruit
+
+Tight using tabs:
+
+apple
+    red fruit
+orange
+    orange fruit
+banana
+    yellow fruit
+
+Loose:
+
+apple
+    red fruit
+
+orange
+    orange fruit
+
+banana
+    yellow fruit
+
+
+Multiple blocks with italics:
+
+apple
+    red fruit
+
+    contains seeds, crisp, pleasant to taste
+
+orange
+    orange fruit
+
+        { orange code block }
+
+      orange block quote
+
+
+Multiple definitions, tight:
+
+apple
+    red fruit
+    computer
+orange
+    orange fruit
+    bank
+
+Multiple definitions, loose:
+
+apple
+    red fruit
+
+    computer
+
+orange
+    orange fruit
+
+    bank
+
+
+Blank line after term, indented marker, alternate markers:
+
+apple
+    red fruit
+
+    computer
+
+orange
+    orange fruit
+
+    1.  sublist
+    2.  sublist
+
+
+HTML Blocks
+===========
+
+Simple block on one line:
+
+foo
+And nested without indentation:
+
+foo
+bar
+Interpreted markdown in a table:
+
+This is emphasized
+And this is strong
+Here's a simple block:
+
+foo
+This should be a code block, though:
+
+    <div>
+        foo
+    </div>
+
+As should this:
+
+    <div>foo</div>
+
+Now, nested:
+
+foo
+This should just be an HTML comment:
+
+Multiline:
+
+Code block:
+
+    <!-- Comment -->
+
+Just plain comment, with trailing spaces on the line:
+
+Code:
+
+    <hr />
+
+Hr's:
+
+
+* * * * *
+
+Inline Markup
+=============
+
+This is emphasized, and so is this.
+
+This is strong, and so is this.
+
+An emphasized link.
+
+This is strong and em.
+
+So is this word.
+
+This is strong and em.
+
+So is this word.
+
+This is code: >, $, \, \$, <html>.
+
+This is strikeout.
+
+Superscripts: abcd ahello ahello there.
+
+Subscripts: H2O, H23O, Hmany of themO.
+
+These should not be superscripts or subscripts, because of the
+unescaped spaces: a^b c^d, a~b c~d.
+
+
+* * * * *
+
+Smart quotes, ellipses, dashes
+==============================
+
+"Hello," said the spider. "'Shelob' is my name."
+
+'A', 'B', and 'C' are letters.
+
+'Oak,' 'elm,' and 'beech' are names of trees. So is 'pine.'
+
+'He said, "I want to go."' Were you alive in the 70's?
+
+Here is some quoted 'code' and a "quoted link".
+
+Some dashes: one--two -- three--four -- five.
+
+Dashes between numbers: 5-7, 255-66, 1987-1999.
+
+Ellipses...and...and....
+
+
+* * * * *
+
+LaTeX
+=====
+
+-   
+-   2+2=4
+-   x \in y
+-   \alpha \wedge \omega
+-   223
+-   p-Tree
+-   Here's some display math:
+    \frac{d}{dx}f(x)=\lim_{h\to 0}\frac{f(x+h)-f(x)}{h}
+-   Here's one that has a line break in it:
+    \alpha + \omega \times x^2.
+
+These shouldn't be math:
+
+-   To get the famous equation, write $e = mc^2$.
+-   $22,000 is a lot of money. So is $34,000. (It worked if "lot"
+    is emphasized.)
+-   Shoes ($20) and socks ($5).
+-   Escaped $: $73 this should be emphasized 23$.
+
+Here's a LaTeX table:
+
+
+
+
+* * * * *
+
+Special Characters
+==================
+
+Here is some unicode:
+
+-   I hat: Î
+-   o umlaut: ö
+-   section: §
+-   set membership: ∈
+-   copyright: ©
+
+AT&T has an ampersand in their name.
+
+AT&T is another way to write it.
+
+This & that.
+
+4 < 5.
+
+6 > 5.
+
+Backslash: \
+
+Backtick: `
+
+Asterisk: *
+
+Underscore: _
+
+Left brace: {
+
+Right brace: }
+
+Left bracket: [
+
+Right bracket: ]
+
+Left paren: (
+
+Right paren: )
+
+Greater-than: >
+
+Hash: #
+
+Period: .
+
+Bang: !
+
+Plus: +
+
+Minus: -
+
+
+* * * * *
+
+Links
+=====
+
+Explicit
+--------
+
+Just a URL.
+
+URL and title.
+
+URL and title.
+
+URL and title.
+
+URL and title
+
+URL and title
+
+with_underscore
+
+Email link
+
+Empty.
+
+Reference
+---------
+
+Foo bar.
+
+Foo bar.
+
+Foo bar.
+
+With embedded [brackets].
+
+b by itself should be a link.
+
+Indented once.
+
+Indented twice.
+
+Indented thrice.
+
+This should [not][] be a link.
+
+    [not]: /url
+
+Foo bar.
+
+Foo biz.
+
+With ampersands
+---------------
+
+Here's a link with an ampersand in the URL.
+
+Here's a link with an amersand in the link text: AT&T.
+
+Here's an inline link.
+
+Here's an inline link in pointy braces.
+
+Autolinks
+---------
+
+With an ampersand: http://example.com/?foo=1&bar=2
+
+-   In a list?
+-   http://example.com/
+-   It should.
+
+An e-mail address: nobody@nowhere.net
+
+  Blockquoted: http://example.com/
+
+Auto-links should not occur here: <http://example.com/>
+
+    or here: <http://example.com/>
+
+
+* * * * *
+
+Images
+======
+
+From "Voyage dans la Lune" by Georges Melies (1902):
+
+
+
+Here is a movie icon.
+
+
+* * * * *
+
+Footnotes
+=========
+
+Here is a footnote reference,[^1] and another.[^2] This should not
+be a footnote reference, because it contains a space.[^my note]
+Here is an inline note.[^3]
+
+  Notes can go in quotes.[^4]
+
+1.  And in list items.[^5]
+
+This paragraph should not be part of the note, as it is not
+indented.
+
+
+[^1]:
+    Here is the footnote. It can go anywhere after the footnote
+    reference. It need not be placed at the end of the document.
+
+[^2]:
+    Here's the long note. This one contains multiple blocks.
+
+    Subsequent blocks are indented to show that they belong to the
+    footnote (as with list items).
+
+          { <code> }
+
+    If you want, you can indent every line, but you can also be lazy
+    and just indent the first line of each block.
+
+[^3]:
+    This is easier to type. Inline notes may contain links and ]
+    verbatim characters, as well as [bracketed text].
+
+[^4]:
+    In quote.
+
+[^5]:
+    In list.
+
+