From 795beac9e6a98794fd8320bd2317e01ed329148b Mon Sep 17 00:00:00 2001
From: Michiel van den Heuvel <michielvdnheuvel@gmail.com>
Date: Sun, 27 Aug 2023 16:20:46 +0200
Subject: Add function to open a file to lspc object

---
 README.md | 19 +++++++++++++++++++
 init.lua  |  8 +++++++-
 2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index ffd98d6..749673f 100644
--- a/README.md
+++ b/README.md
@@ -170,6 +170,25 @@ ls_map.lua = {
 
 Language servers configured in vis-lspc can be found in `supported_servers.lua`.
 
+### Extensibility
+
+The returned module table also includes functions you can use in your own vis
+configuration.
+
+#### `lspc.lspc_open`
+
+Navigate between or in files, while remembering the current position in a runtime history.
+
+```lua
+lspc_open(win, path, line, col, cmd)
+```
+
+  - `win` - a window in which to open the file
+  - `path` - the path to the file to open
+  - `line` - the line to open. (`nil` for no position within the file).
+  - `col` - same as `line`, but for the column.
+  - `cmd` - vis command to open the file. (`e` or `o`, see vis commands)
+
 ## License
 
 All code except otherwise noted is licensed under the term of GPL-3.
diff --git a/init.lua b/init.lua
index ae3622e..de98490 100644
--- a/init.lua
+++ b/init.lua
@@ -419,13 +419,19 @@ local function vis_open_doc_pos(doc_pos, cmd, win)
       end
     end
     vis_open_file(doc_pos.file, cmd)
-    vis.win.selection:to(doc_pos.line, doc_pos.col)
+    if doc_pos.line then
+      vis.win.selection:to(doc_pos.line, doc_pos.col or 0)
+    end
     vis:command('lspc-open')
   else
     vis.win.selection:to(doc_pos.line, doc_pos.col)
   end
 end
 
+lspc.open_file = function(win, path, line, col, cmd)
+  vis_open_doc_pos({file = path, line = line, col = col}, cmd or 'e', win)
+end
+
 -- Support jumping between document positions
 -- Stack of edited document positions
 local doc_pos_history = {}
-- 
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