feat: basic support for resizing the yazi window

When the neovim window is resized, the yazi floating window will now
resize itself.

Note that this doesn't currently work in some cases apparently because
of a bug in neovim. You can subscribe to
#39 for updates.

lua/yazi.lua

@@ -37,7 +37,7 @@ function M.yazi(config, path)
 
   if M.yazi_loaded == false then
     -- ensure that the buffer is closed on exit
-    vimfn.termopen(cmd, {
+    local job_id = vimfn.termopen(cmd, {
       ---@diagnostic disable-next-line: unused-local
       on_exit = function(_job_id, code, _event)
         M.yazi_loaded = false
@@ -57,6 +57,9 @@ function M.yazi(config, path)
 
     config.hooks.yazi_opened(path, win.content_buffer, config)
     config.set_keymappings_function(win.content_buffer, config)
+    win.on_resized = function(event)
+      vim.fn.jobresize(job_id, event.win_width, event.win_height)
+    end
   end
   vim.schedule(function()
     vim.cmd('startinsert')

lua/yazi/window.lua

@@ -5,11 +5,16 @@ local M = {}
 ---@field win integer floating_window_id
 ---@field content_buffer integer
 ---@field config YaziConfig
+---@field on_resized fun(event: yazi.FloatingWindowResizedEvent): nil # allows resizing the contents (the yazi terminal) inside of the floating window
 ---@field private cleanup fun(): nil
 local YaziFloatingWindow = {}
 ---@diagnostic disable-next-line: inject-field
 YaziFloatingWindow.__index = YaziFloatingWindow
 
+---@class yazi.FloatingWindowResizedEvent
+---@field win_height integer
+---@field win_width integer
+
 M.YaziFloatingWindow = YaziFloatingWindow
 
 ---@param config YaziConfig
@@ -36,24 +41,34 @@ function YaziFloatingWindow:close()
   end
 end
 
-function YaziFloatingWindow:open_and_display()
-  local height = math.ceil(
-    vim.o.lines * self.config.floating_window_scaling_factor
-  ) - 1
-  local width =
-    math.ceil(vim.o.columns * self.config.floating_window_scaling_factor)
+---@param config YaziConfig
+local function get_window_dimensions(config)
+  local height = math.ceil(vim.o.lines * config.floating_window_scaling_factor)
+    - 1
+  local width = math.ceil(vim.o.columns * config.floating_window_scaling_factor)
 
   local row = math.ceil(vim.o.lines - height) / 2
   local col = math.ceil(vim.o.columns - width) / 2
 
+  return {
+    height = height,
+    width = width,
+    row = row,
+    col = col,
+  }
+end
+
+function YaziFloatingWindow:open_and_display()
+  local dimensions = get_window_dimensions(self.config)
+
   ---@type vim.api.keyset.win_config
   local opts = {
     style = 'minimal',
     relative = 'editor',
-    row = row,
-    col = col,
-    width = width,
-    height = height,
+    row = dimensions.row,
+    col = dimensions.col,
+    width = dimensions.width,
+    height = dimensions.height,
     border = self.config.yazi_floating_window_border,
   }
 
@@ -75,6 +90,27 @@ function YaziFloatingWindow:open_and_display()
     self:add_hacky_mouse_support(yazi_buffer)
   end
 
+  vim.api.nvim_create_autocmd({ 'VimResized' }, {
+    buffer = yazi_buffer,
+    callback = function()
+      local dims = get_window_dimensions(self.config)
+
+      vim.api.nvim_win_set_config(win, {
+        width = dims.width,
+        height = dims.height,
+        row = dims.row,
+        col = dims.col,
+        relative = 'editor',
+        style = 'minimal',
+      })
+
+      self.on_resized({
+        win_height = dims.height,
+        win_width = dims.width,
+      })
+    end,
+  })
+
   return self
 end