Compare the properties of plain links.

org_mode_samples/object/plain_link/all_default_links_with_search_option.org

@@ -0,0 +1,25 @@
+non-link text::foo
+eww://foo::foo
+rmail://foo::foo
+mhe://foo::foo
+irc://foo::foo
+info://foo::foo
+gnus://foo::foo
+docview://foo::foo
+bibtex://foo::foo
+bbdb://foo::foo
+w3m://foo::foo
+doi://foo::foo
+file+sys://foo::foo
+file+emacs://foo::foo
+shell://foo::foo
+news://foo::foo
+mailto://foo::foo
+https://foo::foo
+http://foo::foo
+ftp://foo::foo
+help://foo::foo
+file://foo::foo
+elisp://foo::foo
+randomfakeprotocl://foo::foo
+non-link text::foo

org_mode_samples/object/plain_link/search_option.org

@@ -6,3 +6,6 @@ file:simple.org::foo
 bar
 file:simple.org::foo::bar
 file:simple.org::/foo/
+
+# Does not become a search option because it is inside parenthesis.
+https://en.wikipedia.org/wiki/Shebang_(Uni::x)

src/compare/diff.rs

@@ -2936,10 +2936,55 @@ fn compare_plain_link<'b, 's>(
     emacs: &'b Token<'s>,
     rust: &'b PlainLink<'s>,
 ) -> Result<DiffEntry<'b, 's>, Box<dyn std::error::Error>> {
-    let this_status = DiffStatus::Good;
-    let message = None;
+    let mut this_status = DiffStatus::Good;
+    let mut message = None;
 
-    // TODO: Compare :type :path :format :raw-link :application :search-option
+    if let Some((new_status, new_message)) = compare_properties!(
+        emacs,
+        rust,
+        (
+            EmacsField::Required(":type"),
+            |r| {
+                match &r.link_type {
+                    LinkType::File => Some(Cow::Borrowed("file")),
+                    LinkType::Protocol(protocol) => Some(protocol.clone()),
+                    LinkType::Id => Some(Cow::Borrowed("id")),
+                    LinkType::CustomId => Some(Cow::Borrowed("custom-id")),
+                    LinkType::CodeRef => Some(Cow::Borrowed("coderef")),
+                    LinkType::Fuzzy => Some(Cow::Borrowed("fuzzy")),
+                }
+            },
+            compare_property_quoted_string
+        ),
+        (
+            EmacsField::Required(":path"),
+            |r| Some(r.path),
+            compare_property_quoted_string
+        ),
+        (
+            EmacsField::Required(":format"),
+            |_| Some("plain"),
+            compare_property_unquoted_atom
+        ),
+        (
+            EmacsField::Required(":raw-link"),
+            |r| Some(r.raw_link),
+            compare_property_quoted_string
+        ),
+        (
+            EmacsField::Required(":application"),
+            compare_identity,
+            compare_property_always_nil
+        ),
+        (
+            EmacsField::Required(":search-option"),
+            |r| r.search_option,
+            compare_property_quoted_string
+        )
+    )? {
+        this_status = new_status;
+        message = new_message;
+    }
 
     Ok(DiffResult {
         status: this_status,

src/parser/plain_link.rs

@@ -1,11 +1,15 @@
 use nom::branch::alt;
+use nom::bytes::complete::is_not;
 use nom::bytes::complete::tag;
 use nom::bytes::complete::tag_no_case;
 use nom::character::complete::anychar;
 use nom::character::complete::none_of;
 use nom::character::complete::one_of;
+use nom::combinator::consumed;
 use nom::combinator::eof;
+use nom::combinator::map;
 use nom::combinator::not;
+use nom::combinator::opt;
 use nom::combinator::peek;
 use nom::combinator::recognize;
 use nom::combinator::verify;
@@ -30,6 +34,7 @@ use crate::error::Res;
 use crate::parser::util::exit_matcher_parser;
 use crate::parser::util::get_consumed;
 use crate::parser::util::WORD_CONSTITUENT_CHARACTERS;
+use crate::types::LinkType;
 use crate::types::PlainLink;
 
 #[cfg_attr(feature = "tracing", tracing::instrument(ret, level = "debug"))]
@@ -38,9 +43,7 @@ pub(crate) fn plain_link<'b, 'g, 'r, 's>(
     input: OrgSource<'s>,
 ) -> Res<OrgSource<'s>, PlainLink<'s>> {
     let (remaining, _) = pre(context, input)?;
-    let (remaining, proto) = protocol(context, remaining)?;
-    let (remaining, _separator) = tag(":")(remaining)?;
-    let (remaining, path) = path_plain(context, remaining)?;
+    let (remaining, path_plain) = parse_path_plain(context, remaining)?;
     peek(parser_with_context!(post)(context))(remaining)?;
     let (remaining, _trailing_whitespace) =
         maybe_consume_object_trailing_whitespace_if_not_exiting(context, remaining)?;
@@ -49,12 +52,22 @@ pub(crate) fn plain_link<'b, 'g, 'r, 's>(
         remaining,
         PlainLink {
             source: source.into(),
-            link_type: proto.into(),
-            path: path.into(),
+            link_type: path_plain.link_type,
+            path: path_plain.path,
+            raw_link: path_plain.raw_link,
+            search_option: path_plain.search_option,
         },
     ))
 }
 
+#[derive(Debug)]
+struct PathPlain<'s> {
+    link_type: LinkType<'s>,
+    path: &'s str,
+    raw_link: &'s str,
+    search_option: Option<&'s str>,
+}
+
 #[cfg_attr(feature = "tracing", tracing::instrument(ret, level = "debug"))]
 fn pre<'b, 'g, 'r, 's>(
     _context: RefContext<'b, 'g, 'r, 's>,
@@ -84,6 +97,59 @@ fn post<'b, 'g, 'r, 's>(
     Ok((remaining, ()))
 }
 
+fn parse_path_plain<'b, 'g, 'r, 's>(
+    context: RefContext<'b, 'g, 'r, 's>,
+    input: OrgSource<'s>,
+) -> Res<OrgSource<'s>, PathPlain<'s>> {
+    alt((
+        parser_with_context!(file_path_plain)(context),
+        parser_with_context!(protocol_path_plain)(context),
+    ))(input)
+}
+
+fn file_path_plain<'b, 'g, 'r, 's>(
+    context: RefContext<'b, 'g, 'r, 's>,
+    input: OrgSource<'s>,
+) -> Res<OrgSource<'s>, PathPlain<'s>> {
+    let (remaining, (raw_link, (_, path, search_option))) = consumed(tuple((
+        tag("file:"),
+        parser_with_context!(path_plain)(context),
+        opt(map(
+            tuple((tag("::"), is_not(" \t\r\n"))),
+            |(_, search_option)| search_option,
+        )),
+    )))(input)?;
+    Ok((
+        remaining,
+        PathPlain {
+            link_type: LinkType::File,
+            path: path.into(),
+            raw_link: raw_link.into(),
+            search_option: search_option.map(Into::<&str>::into),
+        },
+    ))
+}
+
+fn protocol_path_plain<'b, 'g, 'r, 's>(
+    context: RefContext<'b, 'g, 'r, 's>,
+    input: OrgSource<'s>,
+) -> Res<OrgSource<'s>, PathPlain<'s>> {
+    let (remaining, (raw_link, (protocol, _, path))) = consumed(tuple((
+        parser_with_context!(protocol)(context),
+        tag(":"),
+        parser_with_context!(path_plain)(context),
+    )))(input)?;
+    Ok((
+        remaining,
+        PathPlain {
+            link_type: LinkType::Protocol(protocol.into()),
+            path: path.into(),
+            raw_link: raw_link.into(),
+            search_option: None,
+        },
+    ))
+}
+
 #[cfg_attr(feature = "tracing", tracing::instrument(ret, level = "debug"))]
 pub(crate) fn protocol<'b, 'g, 'r, 's>(
     context: RefContext<'b, 'g, 'r, 's>,

src/types/object.rs

@@ -104,8 +104,10 @@ pub struct RadioLink<'s> {
 #[derive(Debug, PartialEq)]
 pub struct PlainLink<'s> {
     pub source: &'s str,
-    pub link_type: &'s str,
+    pub link_type: LinkType<'s>,
     pub path: &'s str,
+    pub raw_link: &'s str,
+    pub search_option: Option<&'s str>,
 }
 
 #[derive(Debug, PartialEq)]