wip

lua/plugins/file-explorer.lua

@@ -6,7 +6,28 @@ return {
   {
     "echasnovski/mini.files",
     version = false,
-    lazy = false,
+    keys = {
+      {
+        "<leader>e",
+        function()
+          local MiniFiles = require "mini.files"
+          if not MiniFiles.close() then
+            MiniFiles.open(vim.api.nvim_buf_get_name(0))
+          end
+        end,
+        desc = "File explorer (current file)",
+      },
+      {
+        "<leader>E",
+        function()
+          local MiniFiles = require "mini.files"
+          if not MiniFiles.close() then
+            MiniFiles.open(vim.uv.cwd())
+          end
+        end,
+        desc = "File explorer (cwd)",
+      },
+    },
     config = function()
       require("mini.files").setup {
         mappings = {
@@ -33,20 +54,52 @@ return {
         },
       }
 
-      local map = vim.keymap.set
-      map("n", "<leader>e", function()
-        local MiniFiles = require "mini.files"
-        if not MiniFiles.close() then
-          MiniFiles.open(vim.api.nvim_buf_get_name(0))
-        end
-      end, { desc = "File explorer (current file)" })
+      -- https://github.com/nvim-mini/mini.nvim/discussions/2173
+      -- Window width based on the offset from the center, i.e. center window
+      -- is 60, then next over is 20, then the rest are 10.
+      -- Can use more resolution if you want like { 60, 20, 20, 10, 5 }
+      local widths = { 60, 20, 10 }
 
-      map("n", "<leader>E", function()
-        local MiniFiles = require "mini.files"
-        if not MiniFiles.close() then
-          MiniFiles.open(vim.uv.cwd())
+      local ensure_center_layout = function(ev)
+        local state = MiniFiles.get_explorer_state()
+        if state == nil then
+          return
         end
-      end, { desc = "File explorer (cwd)" })
+
+        -- Compute "depth offset" - how many windows are between this and focused
+        local path_this = vim.api.nvim_buf_get_name(ev.data.buf_id):match "^minifiles://%d+/(.*)$"
+        local depth_this
+        for i, path in ipairs(state.branch) do
+          if path == path_this then
+            depth_this = i
+          end
+        end
+        if depth_this == nil then
+          return
+        end
+        local depth_offset = depth_this - state.depth_focus
+
+        -- Adjust config of this event's window
+        local i = math.abs(depth_offset) + 1
+        local win_config = vim.api.nvim_win_get_config(ev.data.win_id)
+        win_config.width = i <= #widths and widths[i] or widths[#widths]
+
+        win_config.col = math.floor(0.5 * (vim.o.columns - widths[1]))
+        for j = 1, math.abs(depth_offset) do
+          local sign = depth_offset == 0 and 0 or (depth_offset > 0 and 1 or -1)
+          -- widths[j+1] for the negative case because we don't want to add the center window's width
+          local prev_win_width = (sign == -1 and widths[j + 1]) or widths[j] or widths[#widths]
+          -- Add an extra +2 each step to account for the border width
+          win_config.col = win_config.col + sign * (prev_win_width + 2)
+        end
+
+        win_config.height = depth_offset == 0 and 25 or 20
+        win_config.row = math.floor(0.5 * (vim.o.lines - win_config.height))
+        win_config.border = { "🭽", "▔", "🭾", "▕", "🭿", "▁", "🭼", "▏" }
+        vim.api.nvim_win_set_config(ev.data.win_id, win_config)
+      end
+
+      vim.api.nvim_create_autocmd("User", { pattern = "MiniFilesWindowUpdate", callback = ensure_center_layout })
     end,
   },
 }