Added Attr field to Header.

Previously header ids were autogenerated by the writers.
Now they are generated (unless supplied explicitly) in the
markdown parser, if the `header_identifiers` extension is
selected.

In addition, the textile reader now supports id attributes on
headers.

1 files changed, 31 insertions, 31 deletions

diff --git a/tests/writer.native b/tests/writer.native
index f2c28f58c..ec2bd08ad 100644
--- a/tests/writer.native
+++ b/tests/writer.native
@@ -1,25 +1,25 @@
 Pandoc (Meta {docTitle = [Str "Pandoc",Space,Str "Test",Space,Str "Suite"], docAuthors = [[Str "John",Space,Str "MacFarlane"],[Str "Anonymous"]], docDate = [Str "July",Space,Str "17,",Space,Str "2006"]})
 [Para [Str "This",Space,Str "is",Space,Str "a",Space,Str "set",Space,Str "of",Space,Str "tests",Space,Str "for",Space,Str "pandoc.",Space,Str "Most",Space,Str "of",Space,Str "them",Space,Str "are",Space,Str "adapted",Space,Str "from",Space,Str "John",Space,Str "Gruber\8217s",Space,Str "markdown",Space,Str "test",Space,Str "suite."]
 ,HorizontalRule
-,Header 1 [Str "Headers"]
-,Header 2 [Str "Level",Space,Str "2",Space,Str "with",Space,Str "an",Space,Link [Str "embedded",Space,Str "link"] ("/url","")]
-,Header 3 [Str "Level",Space,Str "3",Space,Str "with",Space,Emph [Str "emphasis"]]
-,Header 4 [Str "Level",Space,Str "4"]
-,Header 5 [Str "Level",Space,Str "5"]
-,Header 1 [Str "Level",Space,Str "1"]
-,Header 2 [Str "Level",Space,Str "2",Space,Str "with",Space,Emph [Str "emphasis"]]
-,Header 3 [Str "Level",Space,Str "3"]
+,Header 1 ("headers",[],[]) [Str "Headers"]
+,Header 2 ("level-2-with-an-embedded-link",[],[]) [Str "Level",Space,Str "2",Space,Str "with",Space,Str "an",Space,Link [Str "embedded",Space,Str "link"] ("/url","")]
+,Header 3 ("level-3-with-emphasis",[],[]) [Str "Level",Space,Str "3",Space,Str "with",Space,Emph [Str "emphasis"]]
+,Header 4 ("level-4",[],[]) [Str "Level",Space,Str "4"]
+,Header 5 ("level-5",[],[]) [Str "Level",Space,Str "5"]
+,Header 1 ("level-1",[],[]) [Str "Level",Space,Str "1"]
+,Header 2 ("level-2-with-emphasis",[],[]) [Str "Level",Space,Str "2",Space,Str "with",Space,Emph [Str "emphasis"]]
+,Header 3 ("level-3",[],[]) [Str "Level",Space,Str "3"]
 ,Para [Str "with",Space,Str "no",Space,Str "blank",Space,Str "line"]
-,Header 2 [Str "Level",Space,Str "2"]
+,Header 2 ("level-2",[],[]) [Str "Level",Space,Str "2"]
 ,Para [Str "with",Space,Str "no",Space,Str "blank",Space,Str "line"]
 ,HorizontalRule
-,Header 1 [Str "Paragraphs"]
+,Header 1 ("paragraphs",[],[]) [Str "Paragraphs"]
 ,Para [Str "Here\8217s",Space,Str "a",Space,Str "regular",Space,Str "paragraph."]
 ,Para [Str "In",Space,Str "Markdown",Space,Str "1.0.0",Space,Str "and",Space,Str "earlier.",Space,Str "Version",Space,Str "8.",Space,Str "This",Space,Str "line",Space,Str "turns",Space,Str "into",Space,Str "a",Space,Str "list",Space,Str "item.",Space,Str "Because",Space,Str "a",Space,Str "hard-wrapped",Space,Str "line",Space,Str "in",Space,Str "the",Space,Str "middle",Space,Str "of",Space,Str "a",Space,Str "paragraph",Space,Str "looked",Space,Str "like",Space,Str "a",Space,Str "list",Space,Str "item."]
 ,Para [Str "Here\8217s",Space,Str "one",Space,Str "with",Space,Str "a",Space,Str "bullet.",Space,Str "*",Space,Str "criminey."]
 ,Para [Str "There",Space,Str "should",Space,Str "be",Space,Str "a",Space,Str "hard",Space,Str "line",Space,Str "break",LineBreak,Str "here."]
 ,HorizontalRule
-,Header 1 [Str "Block",Space,Str "Quotes"]
+,Header 1 ("block-quotes",[],[]) [Str "Block",Space,Str "Quotes"]
 ,Para [Str "E-mail",Space,Str "style:"]
 ,BlockQuote
  [Para [Str "This",Space,Str "is",Space,Str "a",Space,Str "block",Space,Str "quote.",Space,Str "It",Space,Str "is",Space,Str "pretty",Space,Str "short."]]
@@ -38,14 +38,14 @@ Pandoc (Meta {docTitle = [Str "Pandoc",Space,Str "Test",Space,Str "Suite"], docA
 ,Para [Str "This",Space,Str "should",Space,Str "not",Space,Str "be",Space,Str "a",Space,Str "block",Space,Str "quote:",Space,Str "2",Space,Str ">",Space,Str "1."]
 ,Para [Str "And",Space,Str "a",Space,Str "following",Space,Str "paragraph."]
 ,HorizontalRule
-,Header 1 [Str "Code",Space,Str "Blocks"]
+,Header 1 ("code-blocks",[],[]) [Str "Code",Space,Str "Blocks"]
 ,Para [Str "Code:"]
 ,CodeBlock ("",[],[]) "---- (should be four hyphens)\n\nsub status {\n    print \"working\";\n}\n\nthis code block is indented by one tab"
 ,Para [Str "And:"]
 ,CodeBlock ("",[],[]) "    this code block is indented by two tabs\n\nThese should not be escaped:  \\$ \\\\ \\> \\[ \\{"
 ,HorizontalRule
-,Header 1 [Str "Lists"]
-,Header 2 [Str "Unordered"]
+,Header 1 ("lists",[],[]) [Str "Lists"]
+,Header 2 ("unordered",[],[]) [Str "Unordered"]
 ,Para [Str "Asterisks",Space,Str "tight:"]
 ,BulletList
  [[Plain [Str "asterisk",Space,Str "1"]]
@@ -76,7 +76,7 @@ Pandoc (Meta {docTitle = [Str "Pandoc",Space,Str "Test",Space,Str "Suite"], docA
  [[Para [Str "Minus",Space,Str "1"]]
  ,[Para [Str "Minus",Space,Str "2"]]
  ,[Para [Str "Minus",Space,Str "3"]]]
-,Header 2 [Str "Ordered"]
+,Header 2 ("ordered",[],[]) [Str "Ordered"]
 ,Para [Str "Tight:"]
 ,OrderedList (1,Decimal,Period)
  [[Plain [Str "First"]]
@@ -103,7 +103,7 @@ Pandoc (Meta {docTitle = [Str "Pandoc",Space,Str "Test",Space,Str "Suite"], docA
   ,Para [Str "Item",Space,Str "1.",Space,Str "graf",Space,Str "two.",Space,Str "The",Space,Str "quick",Space,Str "brown",Space,Str "fox",Space,Str "jumped",Space,Str "over",Space,Str "the",Space,Str "lazy",Space,Str "dog\8217s",Space,Str "back."]]
  ,[Para [Str "Item",Space,Str "2."]]
  ,[Para [Str "Item",Space,Str "3."]]]
-,Header 2 [Str "Nested"]
+,Header 2 ("nested",[],[]) [Str "Nested"]
 ,BulletList
  [[Plain [Str "Tab"]
   ,BulletList
@@ -128,14 +128,14 @@ Pandoc (Meta {docTitle = [Str "Pandoc",Space,Str "Test",Space,Str "Suite"], docA
    ,[Plain [Str "Fie"]]
    ,[Plain [Str "Foe"]]]]
  ,[Para [Str "Third"]]]
-,Header 2 [Str "Tabs",Space,Str "and",Space,Str "spaces"]
+,Header 2 ("tabs-and-spaces",[],[]) [Str "Tabs",Space,Str "and",Space,Str "spaces"]
 ,BulletList
  [[Para [Str "this",Space,Str "is",Space,Str "a",Space,Str "list",Space,Str "item",Space,Str "indented",Space,Str "with",Space,Str "tabs"]]
  ,[Para [Str "this",Space,Str "is",Space,Str "a",Space,Str "list",Space,Str "item",Space,Str "indented",Space,Str "with",Space,Str "spaces"]
   ,BulletList
    [[Para [Str "this",Space,Str "is",Space,Str "an",Space,Str "example",Space,Str "list",Space,Str "item",Space,Str "indented",Space,Str "with",Space,Str "tabs"]]
    ,[Para [Str "this",Space,Str "is",Space,Str "an",Space,Str "example",Space,Str "list",Space,Str "item",Space,Str "indented",Space,Str "with",Space,Str "spaces"]]]]]
-,Header 2 [Str "Fancy",Space,Str "list",Space,Str "markers"]
+,Header 2 ("fancy-list-markers",[],[]) [Str "Fancy",Space,Str "list",Space,Str "markers"]
 ,OrderedList (2,Decimal,TwoParens)
  [[Plain [Str "begins",Space,Str "with",Space,Str "2"]]
  ,[Para [Str "and",Space,Str "now",Space,Str "3"]
@@ -165,7 +165,7 @@ Pandoc (Meta {docTitle = [Str "Pandoc",Space,Str "Test",Space,Str "Suite"], docA
 ,Para [Str "M.A.\160\&2007"]
 ,Para [Str "B.",Space,Str "Williams"]
 ,HorizontalRule
-,Header 1 [Str "Definition",Space,Str "Lists"]
+,Header 1 ("definition-lists",[],[]) [Str "Definition",Space,Str "Lists"]
 ,Para [Str "Tight",Space,Str "using",Space,Str "spaces:"]
 ,DefinitionList
  [([Str "apple"],
@@ -226,7 +226,7 @@ Pandoc (Meta {docTitle = [Str "Pandoc",Space,Str "Test",Space,Str "Suite"], docA
     ,OrderedList (1,Decimal,Period)
      [[Plain [Str "sublist"]]
      ,[Plain [Str "sublist"]]]]])]
-,Header 1 [Str "HTML",Space,Str "Blocks"]
+,Header 1 ("html-blocks",[],[]) [Str "HTML",Space,Str "Blocks"]
 ,Para [Str "Simple",Space,Str "block",Space,Str "on",Space,Str "one",Space,Str "line:"]
 ,RawBlock "html" "<div>"
 ,Plain [Str "foo"]
@@ -268,7 +268,7 @@ Pandoc (Meta {docTitle = [Str "Pandoc",Space,Str "Test",Space,Str "Suite"], docA
 ,Para [Str "Hr\8217s:"]
 ,RawBlock "html" "<hr>\n\n<hr />\n\n<hr />\n\n<hr>   \n\n<hr />  \n\n<hr /> \n\n<hr class=\"foo\" id=\"bar\" />\n\n<hr class=\"foo\" id=\"bar\" />\n\n<hr class=\"foo\" id=\"bar\">\n"
 ,HorizontalRule
-,Header 1 [Str "Inline",Space,Str "Markup"]
+,Header 1 ("inline-markup",[],[]) [Str "Inline",Space,Str "Markup"]
 ,Para [Str "This",Space,Str "is",Space,Emph [Str "emphasized"],Str ",",Space,Str "and",Space,Str "so",Space,Emph [Str "is",Space,Str "this"],Str "."]
 ,Para [Str "This",Space,Str "is",Space,Strong [Str "strong"],Str ",",Space,Str "and",Space,Str "so",Space,Strong [Str "is",Space,Str "this"],Str "."]
 ,Para [Str "An",Space,Emph [Link [Str "emphasized",Space,Str "link"] ("/url","")],Str "."]
@@ -282,7 +282,7 @@ Pandoc (Meta {docTitle = [Str "Pandoc",Space,Str "Test",Space,Str "Suite"], docA
 ,Para [Str "Subscripts:",Space,Str "H",Subscript [Str "2"],Str "O,",Space,Str "H",Subscript [Str "23"],Str "O,",Space,Str "H",Subscript [Str "many\160of\160them"],Str "O."]
 ,Para [Str "These",Space,Str "should",Space,Str "not",Space,Str "be",Space,Str "superscripts",Space,Str "or",Space,Str "subscripts,",Space,Str "because",Space,Str "of",Space,Str "the",Space,Str "unescaped",Space,Str "spaces:",Space,Str "a^b",Space,Str "c^d,",Space,Str "a~b",Space,Str "c~d."]
 ,HorizontalRule
-,Header 1 [Str "Smart",Space,Str "quotes,",Space,Str "ellipses,",Space,Str "dashes"]
+,Header 1 ("smart-quotes-ellipses-dashes",[],[]) [Str "Smart",Space,Str "quotes,",Space,Str "ellipses,",Space,Str "dashes"]
 ,Para [Quoted DoubleQuote [Str "Hello,"],Space,Str "said",Space,Str "the",Space,Str "spider.",Space,Quoted DoubleQuote [Quoted SingleQuote [Str "Shelob"],Space,Str "is",Space,Str "my",Space,Str "name."]]
 ,Para [Quoted SingleQuote [Str "A"],Str ",",Space,Quoted SingleQuote [Str "B"],Str ",",Space,Str "and",Space,Quoted SingleQuote [Str "C"],Space,Str "are",Space,Str "letters."]
 ,Para [Quoted SingleQuote [Str "Oak,"],Space,Quoted SingleQuote [Str "elm,"],Space,Str "and",Space,Quoted SingleQuote [Str "beech"],Space,Str "are",Space,Str "names",Space,Str "of",Space,Str "trees.",Space,Str "So",Space,Str "is",Space,Quoted SingleQuote [Str "pine."]]
@@ -292,7 +292,7 @@ Pandoc (Meta {docTitle = [Str "Pandoc",Space,Str "Test",Space,Str "Suite"], docA
 ,Para [Str "Dashes",Space,Str "between",Space,Str "numbers:",Space,Str "5\8211\&7,",Space,Str "255\8211\&66,",Space,Str "1987\8211\&1999."]
 ,Para [Str "Ellipses\8230and\8230and\8230."]
 ,HorizontalRule
-,Header 1 [Str "LaTeX"]
+,Header 1 ("latex",[],[]) [Str "LaTeX"]
 ,BulletList
  [[Plain [RawInline "tex" "\\cite[22-23]{smith.1899}"]]
  ,[Plain [Math InlineMath "2+2=4"]]
@@ -311,7 +311,7 @@ Pandoc (Meta {docTitle = [Str "Pandoc",Space,Str "Test",Space,Str "Suite"], docA
 ,Para [Str "Here\8217s",Space,Str "a",Space,Str "LaTeX",Space,Str "table:"]
 ,RawBlock "latex" "\\begin{tabular}{|l|l|}\\hline\nAnimal & Number \\\\ \\hline\nDog    & 2      \\\\\nCat    & 1      \\\\ \\hline\n\\end{tabular}"
 ,HorizontalRule
-,Header 1 [Str "Special",Space,Str "Characters"]
+,Header 1 ("special-characters",[],[]) [Str "Special",Space,Str "Characters"]
 ,Para [Str "Here",Space,Str "is",Space,Str "some",Space,Str "unicode:"]
 ,BulletList
  [[Plain [Str "I",Space,Str "hat:",Space,Str "\206"]]
@@ -341,8 +341,8 @@ Pandoc (Meta {docTitle = [Str "Pandoc",Space,Str "Test",Space,Str "Suite"], docA
 ,Para [Str "Plus:",Space,Str "+"]
 ,Para [Str "Minus:",Space,Str "-"]
 ,HorizontalRule
-,Header 1 [Str "Links"]
-,Header 2 [Str "Explicit"]
+,Header 1 ("links",[],[]) [Str "Links"]
+,Header 2 ("explicit",[],[]) [Str "Explicit"]
 ,Para [Str "Just",Space,Str "a",Space,Link [Str "URL"] ("/url/",""),Str "."]
 ,Para [Link [Str "URL",Space,Str "and",Space,Str "title"] ("/url/","title"),Str "."]
 ,Para [Link [Str "URL",Space,Str "and",Space,Str "title"] ("/url/","title preceded by two spaces"),Str "."]
@@ -352,7 +352,7 @@ Pandoc (Meta {docTitle = [Str "Pandoc",Space,Str "Test",Space,Str "Suite"], docA
 ,Para [Link [Str "with_underscore"] ("/url/with_underscore","")]
 ,Para [Link [Str "Email",Space,Str "link"] ("mailto:nobody@nowhere.net","")]
 ,Para [Link [Str "Empty"] ("",""),Str "."]
-,Header 2 [Str "Reference"]
+,Header 2 ("reference",[],[]) [Str "Reference"]
 ,Para [Str "Foo",Space,Link [Str "bar"] ("/url/",""),Str "."]
 ,Para [Str "Foo",Space,Link [Str "bar"] ("/url/",""),Str "."]
 ,Para [Str "Foo",Space,Link [Str "bar"] ("/url/",""),Str "."]
@@ -365,12 +365,12 @@ Pandoc (Meta {docTitle = [Str "Pandoc",Space,Str "Test",Space,Str "Suite"], docA
 ,CodeBlock ("",[],[]) "[not]: /url"
 ,Para [Str "Foo",Space,Link [Str "bar"] ("/url/","Title with \"quotes\" inside"),Str "."]
 ,Para [Str "Foo",Space,Link [Str "biz"] ("/url/","Title with \"quote\" inside"),Str "."]
-,Header 2 [Str "With",Space,Str "ampersands"]
+,Header 2 ("with-ampersands",[],[]) [Str "With",Space,Str "ampersands"]
 ,Para [Str "Here\8217s",Space,Str "a",Space,Link [Str "link",Space,Str "with",Space,Str "an",Space,Str "ampersand",Space,Str "in",Space,Str "the",Space,Str "URL"] ("http://example.com/?foo=1&bar=2",""),Str "."]
 ,Para [Str "Here\8217s",Space,Str "a",Space,Str "link",Space,Str "with",Space,Str "an",Space,Str "amersand",Space,Str "in",Space,Str "the",Space,Str "link",Space,Str "text:",Space,Link [Str "AT&T"] ("http://att.com/","AT&T"),Str "."]
 ,Para [Str "Here\8217s",Space,Str "an",Space,Link [Str "inline",Space,Str "link"] ("/script?foo=1&bar=2",""),Str "."]
 ,Para [Str "Here\8217s",Space,Str "an",Space,Link [Str "inline",Space,Str "link",Space,Str "in",Space,Str "pointy",Space,Str "braces"] ("/script?foo=1&bar=2",""),Str "."]
-,Header 2 [Str "Autolinks"]
+,Header 2 ("autolinks",[],[]) [Str "Autolinks"]
 ,Para [Str "With",Space,Str "an",Space,Str "ampersand:",Space,Link [Str "http://example.com/?foo=1&bar=2"] ("http://example.com/?foo=1&bar=2","")]
 ,BulletList
  [[Plain [Str "In",Space,Str "a",Space,Str "list?"]]
@@ -382,12 +382,12 @@ Pandoc (Meta {docTitle = [Str "Pandoc",Space,Str "Test",Space,Str "Suite"], docA
 ,Para [Str "Auto-links",Space,Str "should",Space,Str "not",Space,Str "occur",Space,Str "here:",Space,Code ("",[],[]) "<http://example.com/>"]
 ,CodeBlock ("",[],[]) "or here: <http://example.com/>"
 ,HorizontalRule
-,Header 1 [Str "Images"]
+,Header 1 ("images",[],[]) [Str "Images"]
 ,Para [Str "From",Space,Quoted DoubleQuote [Str "Voyage",Space,Str "dans",Space,Str "la",Space,Str "Lune"],Space,Str "by",Space,Str "Georges",Space,Str "Melies",Space,Str "(1902):"]
 ,Para [Image [Str "lalune"] ("lalune.jpg","Voyage dans la Lune")]
 ,Para [Str "Here",Space,Str "is",Space,Str "a",Space,Str "movie",Space,Image [Str "movie"] ("movie.jpg",""),Space,Str "icon."]
 ,HorizontalRule
-,Header 1 [Str "Footnotes"]
+,Header 1 ("footnotes",[],[]) [Str "Footnotes"]
 ,Para [Str "Here",Space,Str "is",Space,Str "a",Space,Str "footnote",Space,Str "reference,",Note [Para [Str "Here",Space,Str "is",Space,Str "the",Space,Str "footnote.",Space,Str "It",Space,Str "can",Space,Str "go",Space,Str "anywhere",Space,Str "after",Space,Str "the",Space,Str "footnote",Space,Str "reference.",Space,Str "It",Space,Str "need",Space,Str "not",Space,Str "be",Space,Str "placed",Space,Str "at",Space,Str "the",Space,Str "end",Space,Str "of",Space,Str "the",Space,Str "document."]],Space,Str "and",Space,Str "another.",Note [Para [Str "Here\8217s",Space,Str "the",Space,Str "long",Space,Str "note.",Space,Str "This",Space,Str "one",Space,Str "contains",Space,Str "multiple",Space,Str "blocks."],Para [Str "Subsequent",Space,Str "blocks",Space,Str "are",Space,Str "indented",Space,Str "to",Space,Str "show",Space,Str "that",Space,Str "they",Space,Str "belong",Space,Str "to",Space,Str "the",Space,Str "footnote",Space,Str "(as",Space,Str "with",Space,Str "list",Space,Str "items)."],CodeBlock ("",[],[]) "  { <code> }",Para [Str "If",Space,Str "you",Space,Str "want,",Space,Str "you",Space,Str "can",Space,Str "indent",Space,Str "every",Space,Str "line,",Space,Str "but",Space,Str "you",Space,Str "can",Space,Str "also",Space,Str "be",Space,Str "lazy",Space,Str "and",Space,Str "just",Space,Str "indent",Space,Str "the",Space,Str "first",Space,Str "line",Space,Str "of",Space,Str "each",Space,Str "block."]],Space,Str "This",Space,Str "should",Space,Emph [Str "not"],Space,Str "be",Space,Str "a",Space,Str "footnote",Space,Str "reference,",Space,Str "because",Space,Str "it",Space,Str "contains",Space,Str "a",Space,Str "space.[^my",Space,Str "note]",Space,Str "Here",Space,Str "is",Space,Str "an",Space,Str "inline",Space,Str "note.",Note [Para [Str "This",Space,Str "is",Space,Emph [Str "easier"],Space,Str "to",Space,Str "type.",Space,Str "Inline",Space,Str "notes",Space,Str "may",Space,Str "contain",Space,Link [Str "links"] ("http://google.com",""),Space,Str "and",Space,Code ("",[],[]) "]",Space,Str "verbatim",Space,Str "characters,",Space,Str "as",Space,Str "well",Space,Str "as",Space,Str "[bracketed",Space,Str "text]."]]]
 ,BlockQuote
  [Para [Str "Notes",Space,Str "can",Space,Str "go",Space,Str "in",Space,Str "quotes.",Note [Para [Str "In",Space,Str "quote."]]]]