feat(nvim): follow <scheme://…> autolinks with gf

1 files changed, 33 insertions, 1 deletions

diff --git a/plugin/50-follow.lua b/plugin/50-follow.lua
index e8ed3a6..dd207ab 100644
--- a/plugin/50-follow.lua
+++ b/plugin/50-follow.lua
@@ -147,6 +147,31 @@ local function markdown_link_matches()
 end
 
 ----------------------------------------------------------------------------------------------------
+-- Autolinks ---------------------------------------------------------------------------------------
+----------------------------------------------------------------------------------------------------
+
+--[[ All CommonMark autolinks `<scheme://…>` in the buffer, targeting the inner URL with the angle
+brackets stripped. Registered before the bare-URL entity so a bracketed link wins: the looser URL
+scan would otherwise swallow the closing `>` and trailing punctuation into the target. The match
+spans the brackets so the cursor follows from `<` through `>`. `open_target` percent-decodes the
+URI, so the inner text may be percent-encoded (e.g. `<nvim-help://%27statusline%27>`). ]]
+local function autolink_matches()
+	local out = {}
+	for i, line in ipairs(vim.api.nvim_buf_get_lines(0, 0, -1, false)) do
+		local init = 1
+		while true do
+			local s, e, inner = line:find("<(%a[%w+.-]*://[^>%s]*)>", init)
+			if s == nil then
+				break
+			end
+			out[#out + 1] = { from = { i, s - 1 }, to = { i, e }, target = inner }
+			init = e + 1
+		end
+	end
+	return out
+end
+
+----------------------------------------------------------------------------------------------------
 -- URLs --------------------------------------------------------------------------------------------
 ----------------------------------------------------------------------------------------------------
 
@@ -160,7 +185,13 @@ local function url_matches()
 			if s == nil then
 				break
 			end
-			out[#out + 1] = { from = { i, s - 1 }, to = { i, e }, target = line:sub(s, e) }
+			-- A `<scheme://…>` autolink is matched by the autolink entity; skip it here.
+			local is_autolink = s > 1
+				and line:sub(s - 1, s - 1) == "<"
+				and line:find("^[^>%s]*>", s) ~= nil
+			if not is_autolink then
+				out[#out + 1] = { from = { i, s - 1 }, to = { i, e }, target = line:sub(s, e) }
+			end
 			init = e + 1
 		end
 	end
@@ -241,6 +272,7 @@ else
 	)
 end
 df.register("markdown-link", markdown_link_matches, df.open)
+df.register("autolink", autolink_matches, df.open)
 df.register("url", url_matches, df.open)
 df.register("cfile", cfile_matches, open_cfile)
 df.register_scheme("nvim-help", nvim_help_scheme)