1 files changed, 47 insertions, 0 deletions
diff --git a/parse_wiki_text/src/external_link.rs b/parse_wiki_text/src/external_link.rs
new file mode 100644
index 0000000..ce30f87
--- /dev/null
+++ b/parse_wiki_text/src/external_link.rs
@@ -0,0 +1,47 @@
+// Copyright 2019 Fredrik Portström <https://portstrom.com>
+// This is free software distributed under the terms specified in
+// the file LICENSE at the top-level directory of this distribution.
+
+pub fn parse_external_link_end<'a>(
+    state: &mut crate::State<'a>,
+    start_position: usize,
+    nodes: Vec<crate::Node<'a>>,
+) {
+    let scan_position = state.scan_position;
+    state.flush(scan_position);
+    state.scan_position += 1;
+    state.flushed_position = state.scan_position;
+    let nodes = std::mem::replace(&mut state.nodes, nodes);
+    state.nodes.push(crate::Node::ExternalLink {
+        end: state.scan_position,
+        nodes,
+        start: start_position,
+    });
+}
+
+pub fn parse_external_link_end_of_line(state: &mut crate::State) {
+    let end = state.scan_position;
+    let open_node = state.stack.pop().unwrap();
+    state.warnings.push(crate::Warning {
+        end,
+        message: crate::WarningMessage::InvalidLinkSyntax,
+        start: open_node.start,
+    });
+    state.rewind(open_node.nodes, open_node.start);
+}
+
+pub fn parse_external_link_start(state: &mut crate::State, configuration: &crate::Configuration) {
+    let scheme_start_position = state.scan_position + 1;
+    match configuration
+        .protocols
+        .find(&state.wiki_text[scheme_start_position..])
+    {
+        Err(_) => {
+            state.scan_position = scheme_start_position;
+            return;
+        }
+        Ok(_) => {
+            state.push_open_node(crate::OpenNodeType::ExternalLink, scheme_start_position);
+        }
+    }
+}