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

nvim/lua/plugs/goto-preview.lua

@@ -0,0 +1,29 @@
+local close_handler = require("close_handler")
+
+local close_cb_handle = 0
+
+return {
+    "rmagatti/goto-preview",
+    dependencies = { "rmagatti/logger.nvim" },
+    event = "BufEnter",
+    config = true, -- necessary as per https://github.com/rmagatti/goto-preview/issues/88
+    opts = {
+        post_open_hook = function(_, _)
+            close_cb_handle = close_handler.register_on_close_cb(function()
+                require("goto-preview").close_all_win()
+            end)
+        end,
+        post_close_hook = function(_, _)
+            close_handler.remove_on_close_cb(close_cb_handle)
+        end,
+        border = { "↖", "─", "┐", "│", "┘", "─", "└", "│" },
+        focus_on_open = true,
+        stack_floating_preview_windows = false,
+        preview_window_title = { enable = true, position = "left" },
+        vim_ui_input = false,
+    },
+    keys = {
+        { "gp", function() require("goto-preview").goto_preview_definition() end, },
+        { "gy", function() require("goto-preview").goto_preview_type_definition() end, },
+    },
+}