feat: Add goto-preview and close_handler

nvim/lua/close_handler.lua

@@ -0,0 +1,41 @@
+local utils = require("utils")
+
+local M = {}
+
+local callbacks = {}
+local handle_count = 1
+
+function M.setup()
+    utils.set_keymap_list({
+        {
+            "q",
+            function()
+                for _, cb in ipairs(callbacks) do
+                    if cb ~= nil then
+                        cb()
+                    end
+                end
+            end,
+        },
+    })
+end
+
+function M.register_on_close_cb(cb)
+    assert(type(cb) == "function", "Callback must be a function")
+
+    local handle = handle_count
+    handle_count = handle_count + 1
+    table.insert(callbacks, cb)
+
+    return handle
+end
+
+function M.remove_on_close_cb(cb_handle)
+    assert(type(cb_handle) == "number", "Callback handle must be a number")
+    assert(cb_handle > 0 and cb_handle <= #callbacks, "Invalid callback handle")
+    assert(callbacks[cb_handle] ~= nil, "Callback does not exist")
+
+    callbacks[cb_handle] = nil
+end
+
+return M