Add tests and clean up document alternate ignores

This also backports #355.

Conflicts:
	src/plugin/document.coffee

src/plugin/document.coffee

@@ -106,8 +106,17 @@ class Annotator.Plugin.Document extends Annotator.Plugin
       href = this._absoluteUrl(l.prop('href')) # get absolute url
       rel = l.prop('rel')
       type = l.prop('type')
-      if rel in ["alternate", "canonical", "bookmark"] and type not in ["application/rss+xml", "application/atom+xml"]
-        @metadata.link.push(href: href, rel: rel, type: type)
+      lang = l.prop('hreflang')
+
+      if rel not in ["alternate", "canonical", "bookmark"] then continue
+
+      if rel is 'alternate'
+        # Ignore feeds resources
+        if type and type.match /^application\/(rss|atom)\+xml/ then continue
+        # Ignore alternate languages
+        if lang then continue
+
+      @metadata.link.push(href: href, rel: rel, type: type)
 
     # look for links in scholar metadata
     for name, values of @metadata.highwire

test/spec/plugin/document_spec.coffee

@@ -22,6 +22,7 @@ describe 'Annotator.Plugin.Document', ->
     head.append('<link rel="alternate" href="foo.pdf" type="application/pdf"></link>')
     head.append('<link rel="alternate" href="foo.doc" type="application/msword"></link>')
     head.append('<link rel="bookmark" href="http://example.com/bookmark"></link>')
+    head.append('<link rel="alternate" href="es/foo.html" hreflang="es" type="text/html"></link>')
     head.append('<meta name="citation_doi" content="10.1175/JCLI-D-11-00015.1">')
     head.append('<meta name="citation_title" content="Foo">')
     head.append('<meta name="citation_pdf_url" content="foo.pdf">')
@@ -33,6 +34,7 @@ describe 'Annotator.Plugin.Document', ->
     head.append('<link rel="icon" href="http://example.com/images/icon.ico"></link>')
     head.append('<meta name="eprints.title" content="Computer Lib / Dream Machines">')
     head.append('<meta name="prism.title" content="Literary Machines">')
+    head.append('<link rel="alternate" href="feed" type="application/rss+xml"></link>')
 
     annotation = null
 
@@ -65,6 +67,9 @@ describe 'Annotator.Plugin.Document', ->
       assert.equal(annotation.document.link[5].type, "application/pdf")
       assert.equal(annotation.document.link[6].href, "doi:10.1175/JCLI-D-11-00015.1")
 
+    it 'should ignore atom and RSS feeds and alternate languages', ->
+      assert.equal(annotation.document.link.length, 7)
+
     it 'should have highwire metadata', ->
       assert.ok(annotation.document.highwire)
       assert.deepEqual(annotation.document.highwire.pdf_url, ['foo.pdf'])