(examples/notify.lua) eliminate dependency on non-existent class

It seems that closures are not interacting well with the global nature
of operatorfunc's. That is just a hunch, and this feels like a hack, but
it fixes the issue.

.busted

@@ -0,0 +1,13 @@
+return {
+  _all = {
+    coverage = false,
+    lpath = "lua/?.lua;lua/?/init.lua",
+    lua = "nlua",
+  },
+  default = {
+    verbose = true
+  },
+  tests = {
+    verbose = true
+  },
+}

.github/workflows/ci.yaml

@@ -2,15 +2,28 @@
 name: NeoVim tests
 on: [push]
 jobs:
-  plenary-tests:
+  code-quality:
     runs-on: ubuntu-latest
     env:
       XDG_CONFIG_HOME: ${{ github.workspace }}/.config/
     steps:
       - uses: actions/checkout@v4
-      - uses: rhysd/action-setup-vim@v1
+      - uses: cachix/install-nix-action@v31
         with:
-          neovim: true
-          version: v0.11.0
-          arch: 'x86_64'
-      - run: make test
+          nix_path: nixpkgs=channel:nixos-unstable
+
+      - name: Populate Nix store
+        run:
+          nix-shell --run 'true'
+
+      - name: Type-check with lua-language-server
+        run:
+          nix-shell --run 'make lint'
+
+      - name: Check formatting with stylua
+        run:
+          nix-shell --run 'make fmt-check'
+
+      - name: Run busted tests
+        run:
+          nix-shell --run 'make test'

.gitignore

@@ -1,4 +1,3 @@
-/.lux/
-lux.lock
 *.src.rock
 *.aider*
+luacov.*.out

.luacov

@@ -0,0 +1,6 @@
+return {
+  include = {
+    'lua/u/',
+  },
+  tick = true,
+}

Makefile

@@ -1,16 +1,21 @@
-PLENARY_DIR=~/.local/share/nvim/site/pack/test/opt/plenary.nvim
-
-all: lint test
+all: lint fmt-check test
 
 lint:
-	lua-language-server --check=lua/u/ --checklevel=Error
-	lx check
+	@echo "## Typechecking"
+	@lua-language-server --check=lua/u/ --checklevel=Error
+
+fmt-check:
+	@echo "## Checking code format"
+	@stylua --check .
 
 fmt:
-	stylua .
+	@echo "## Formatting code"
+	@stylua .
 
-test: $(PLENARY_DIR)
-	NVIM_APPNAME=noplugstest nvim -u NORC --headless -c 'set packpath+=~/.local/share/nvim/site' -c 'packadd plenary.nvim' -c "PlenaryBustedDirectory spec/"
-
-$(PLENARY_DIR):
-	git clone https://github.com/nvim-lua/plenary.nvim/ $(PLENARY_DIR)
+test:
+	@rm -f luacov.*.out
+	@echo "## Running tests"
+	@busted --coverage --verbose
+	@echo "## Generating coverage report"
+	@luacov
+	@awk '/^Summary$$/{flag=1;next} flag{print}' luacov.report.out

examples/notify.lua

@@ -1,8 +1,7 @@
-local Buffer = require 'u.buffer'
+local Renderer = require('u.renderer').Renderer
 local TreeBuilder = require('u.renderer').TreeBuilder
 local tracker = require 'u.tracker'
 local utils = require 'u.utils'
-local Window = require 'my.window'
 
 local TIMEOUT = 4000
 local ICONS = {
@@ -14,15 +13,25 @@ local ICONS = {
 }
 local DEFAULT_ICON = { text = '', group = 'DiagnosticSignOk' }
 
---- @alias Notification {
+local S_EDITOR_DIMENSIONS =
+  tracker.create_signal(utils.get_editor_dimensions(), 's:editor_dimensions')
+vim.api.nvim_create_autocmd('VimResized', {
+  callback = function()
+    local new_dim = utils.get_editor_dimensions()
+    S_EDITOR_DIMENSIONS:set(new_dim)
+  end,
+})
+
+--- @alias u.example.Notification {
 ---   kind: number;
 ---   id: number;
 ---   text: string;
+---   timer: uv.uv_timer_t;
 --- }
 
 local M = {}
 
---- @type Window | nil
+--- @type { win: integer, buf: integer, renderer: u.Renderer } | nil
 local notifs_w
 
 local s_notifications_raw = tracker.create_signal {}
@@ -30,44 +39,49 @@ local s_notifications = s_notifications_raw:debounce(50)
 
 -- Render effect:
 tracker.create_effect(function()
-  --- @type Notification[]
+  --- @type u.example.Notification[]
   local notifs = s_notifications:get()
+  --- @type { width: integer, height: integer }
+  local editor_size = S_EDITOR_DIMENSIONS:get()
 
   if #notifs == 0 then
     if notifs_w then
-      notifs_w:close(true)
+      if vim.api.nvim_win_is_valid(notifs_w.win) then vim.api.nvim_win_close(notifs_w.win, true) end
       notifs_w = nil
     end
     return
   end
 
+  local avail_width = editor_size.width
+  local float_width = 40
+  local float_height = math.min(#notifs, editor_size.height - 3)
+  local win_config = {
+    relative = 'editor',
+    anchor = 'NE',
+    row = 0,
+    col = avail_width,
+    width = float_width,
+    height = float_height,
+    border = 'single',
+    focusable = false,
+    zindex = 900,
+  }
   vim.schedule(function()
-    local editor_size = utils.get_editor_dimensions()
-    local avail_width = editor_size.width
-    local float_width = 40
-    local win_config = {
-      relative = 'editor',
-      anchor = 'NE',
-      row = 0,
-      col = avail_width,
-      width = float_width,
-      height = math.min(#notifs, editor_size.height - 3),
-      border = 'single',
-      focusable = false,
-    }
     if not notifs_w or not vim.api.nvim_win_is_valid(notifs_w.win) then
-      notifs_w = Window.new(Buffer.create(false, true), win_config)
-      vim.wo[notifs_w.win].cursorline = false
-      vim.wo[notifs_w.win].list = false
-      vim.wo[notifs_w.win].listchars = ''
-      vim.wo[notifs_w.win].number = false
-      vim.wo[notifs_w.win].relativenumber = false
-      vim.wo[notifs_w.win].wrap = false
+      local b = vim.api.nvim_create_buf(false, true)
+      local w = vim.api.nvim_open_win(b, false, win_config)
+      vim.wo[w].cursorline = false
+      vim.wo[w].list = false
+      vim.wo[w].listchars = ''
+      vim.wo[w].number = false
+      vim.wo[w].relativenumber = false
+      vim.wo[w].wrap = false
+      notifs_w = { win = w, buf = b, renderer = Renderer.new(b) }
     else
-      notifs_w:set_config(win_config)
+      vim.api.nvim_win_set_config(notifs_w.win, win_config)
     end
 
-    notifs_w:render(TreeBuilder.new()
+    notifs_w.renderer:render(TreeBuilder.new()
       :nest(function(tb)
         for idx, notif in ipairs(notifs) do
           if idx > 1 then tb:put '\n' end
@@ -79,48 +93,81 @@ tracker.create_effect(function()
       end)
       :tree())
     vim.api.nvim_win_call(notifs_w.win, function()
-      -- scroll to bottom:
-      vim.cmd.normal 'G'
-      -- scroll all the way to the left:
-      vim.cmd.normal '9999zh'
+      vim.fn.winrestview {
+        -- scroll all the way left:
+        leftcol = 0,
+        -- set the bottom line to be at the bottom of the window:
+        topline = vim.api.nvim_buf_line_count(notifs_w.buf) - win_config.height + 1,
+      }
     end)
   end)
 end)
 
+--- @param id number
+local function _delete_notif(id)
+  --- @param notifs u.example.Notification[]
+  s_notifications_raw:schedule_update(function(notifs)
+    for i, notif in ipairs(notifs) do
+      if notif.id == id then
+        notif.timer:stop()
+        notif.timer:close()
+        table.remove(notifs, i)
+        break
+      end
+    end
+    return notifs
+  end)
+end
+
 local _orig_notify
 
 --- @param msg string
 --- @param level integer|nil
---- @param opts table|nil
-local function my_notify(msg, level, opts)
-  vim.schedule(function() _orig_notify(msg, level, opts) end)
+--- @param opts? { id: number }
+function M.notify(msg, level, opts)
   if level == nil then level = vim.log.levels.INFO end
-  if level < vim.log.levels.INFO then return end
 
-  local id = math.random(math.huge)
+  opts = opts or {}
+  local id = opts.id or math.random(999999999)
 
-  --- @param notifs Notification[]
-  s_notifications_raw:schedule_update(function(notifs)
-    table.insert(notifs, { kind = level, id = id, text = msg })
-    return notifs
-  end)
+  --- @type u.example.Notification?
+  local notif = vim.iter(s_notifications_raw:get()):find(function(n) return n.id == id end)
+  if not notif then
+    -- Create a new notification (maybe):
+    if vim.trim(msg) == '' then return id end
+    if level < vim.log.levels.INFO then return id end
 
-  vim.defer_fn(function()
-    --- @param notifs Notification[]
+    local timer = assert((vim.uv or vim.loop).new_timer(), 'could not create timer')
+    timer:start(TIMEOUT, 0, function() _delete_notif(id) end)
+    notif = {
+      id = id,
+      kind = level,
+      text = msg,
+      timer = timer,
+    }
+    --- @param notifs u.example.Notification[]
     s_notifications_raw:schedule_update(function(notifs)
-      for i, notif in ipairs(notifs) do
-        if notif.id == id then
-          table.remove(notifs, i)
-          break
-        end
-      end
+      table.insert(notifs, notif)
       return notifs
     end)
-  end, TIMEOUT)
+  else
+    -- Update an existing notification:
+    s_notifications_raw:schedule_update(function(notifs)
+      -- We already have a copy-by-reference of the notif we want to modify:
+      notif.timer:stop()
+      notif.text = msg
+      notif.kind = level
+      notif.timer:start(TIMEOUT, 0, function() _delete_notif(id) end)
+
+      return notifs
+    end)
+  end
+
+  return id
 end
 
 local _once_msgs = {}
-local function my_notify_once(msg, level, opts)
+function M.notify_once(msg, level, opts)
   if vim.tbl_contains(_once_msgs, msg) then return false end
   table.insert(_once_msgs, msg)
   vim.notify(msg, level, opts)
@@ -130,8 +177,8 @@ end
 function M.setup()
   if _orig_notify == nil then _orig_notify = vim.notify end
 
-  vim.notify = my_notify
-  vim.notify_once = my_notify_once
+  vim.notify = M.notify
+  vim.notify_once = M.notify_once
 end
 
 return M

lua/u/range.lua

@@ -1,14 +1,6 @@
 local Pos = require 'u.pos'
 
--- Certain functions in the Range class yank text. In order to prevent unwanted
--- highlighting, we intercept and discard some calls to the `on_yank` callback.
-local orig_on_yank = vim.hl.on_yank
-local on_yank_enabled = true
---- @diagnostic disable-next-line: duplicate-set-field
-function vim.hl.on_yank(opts)
-  if not on_yank_enabled then return end
-  return orig_on_yank(opts)
-end
+local ESC = vim.api.nvim_replace_termcodes('<Esc>', true, false, true)
 
 --- @class u.Range
 --- @field start u.Pos
@@ -133,10 +125,6 @@ function Range.from_motion(motion, opts)
   local is_txtobj = scope == 'a' or scope == 'i'
   local is_quote_txtobj = is_txtobj and vim.tbl_contains({ "'", '"', '`' }, motion_rest)
 
-  --- @type u.Pos
-  local start
-  --- @type u.Pos
-  local stop
   -- Capture the original state of the buffer for restoration later.
   local original_state = {
     winview = vim.fn.winsaveview(),
@@ -144,59 +132,65 @@ function Range.from_motion(motion, opts)
     cursor = vim.fn.getpos '.',
     pos_lbrack = vim.fn.getpos "'[",
     pos_rbrack = vim.fn.getpos "']",
+    opfunc = vim.go.operatorfunc,
+    prev_captured_range = _G.Range__from_motion_opfunc_captured_range,
+    prev_mode = vim.fn.mode(),
+    vinf = Range.from_vtext(),
   }
+  --- @type u.Range|nil
+  _G.Range__from_motion_opfunc_captured_range = nil
+
   vim.api.nvim_buf_call(opts.bufnr, function()
     if opts.pos ~= nil then opts.pos:save_to_pos '.' end
 
-    Pos.invalid():save_to_pos "'["
-    Pos.invalid():save_to_pos "']"
-
-    local prev_on_yank_enabled = on_yank_enabled
-    on_yank_enabled = false
+    _G.Range__from_motion_opfunc = function(ty)
+      _G.Range__from_motion_opfunc_captured_range = Range.from_op_func(ty)
+    end
+    vim.go.operatorfunc = 'v:lua.Range__from_motion_opfunc'
     vim.cmd {
       cmd = 'normal',
       bang = not opts.user_defined,
-      args = { '""y' .. motion },
+      args = { ESC .. 'g@' .. motion },
       mods = { silent = true },
     }
-    on_yank_enabled = prev_on_yank_enabled
-
-    start = Pos.from_pos "'["
-    stop = Pos.from_pos "']"
   end)
+  local captured_range = _G.Range__from_motion_opfunc_captured_range
+
   -- Restore original state:
   vim.fn.winrestview(original_state.winview)
   vim.fn.setreg('"', original_state.regquote)
   vim.fn.setpos('.', original_state.cursor)
   vim.fn.setpos("'[", original_state.pos_lbrack)
   vim.fn.setpos("']", original_state.pos_rbrack)
+  if original_state.prev_mode ~= 'n' then original_state.vinf:set_visual_selection() end
+  vim.go.operatorfunc = original_state.opfunc
+  _G.Range__from_motion_opfunc_captured_range = original_state.prev_captured_range
 
-  if start == stop and start:is_invalid() then return nil end
+  if not captured_range then return nil end
 
   -- Fixup the bounds:
   if
     -- I have no idea why, but when yanking `i"`, the stop-mark is
     -- placed on the ending quote. For other text-objects, the stop-
     -- mark is placed before the closing character.
-    (is_quote_txtobj and scope == 'i' and stop:char() == motion_rest)
+    (is_quote_txtobj and scope == 'i' and captured_range.stop:char() == motion_rest)
     -- *Sigh*, this also sometimes happens for `it` as well.
-    or (motion == 'it' and stop:char() == '<')
+    or (motion == 'it' and captured_range.stop:char() == '<')
   then
-    stop = stop:next(-1) or stop
+    captured_range.stop = captured_range.stop:next(-1) or captured_range.stop
   end
   if is_quote_txtobj and scope == 'a' then
-    start = start:find_next(1, motion_rest) or start
-    stop = stop:find_next(-1, motion_rest) or stop
+    captured_range.start = captured_range.start:find_next(1, motion_rest) or captured_range.start
+    captured_range.stop = captured_range.stop:find_next(-1, motion_rest) or captured_range.stop
   end
 
   if
-    opts.contains_cursor
-    and not Range.new(start, stop):contains(Pos.new(unpack(original_state.cursor)))
+    opts.contains_cursor and not captured_range:contains(Pos.new(unpack(original_state.cursor)))
   then
     return nil
   end
 
-  return Range.new(start, stop)
+  return captured_range
 end
 
 --- Get range information from the currently selected visual text.

lux.toml

@@ -1,19 +0,0 @@
-package = "u.nvim"
-version = "0.2.0"
-lua = ">=5.1"
-
-[description]
-summary = ""
-maintainer = "jrop"
-labels = [ "library", "neovim", "neovim-plugin", "range", "utility" ]
-
-
-[dependencies]
-# Add your dependencies here
-# `busted = ">=2.0"`
-
-[run]
-args = [ "src/main.lua" ]
-
-[build]
-type = "builtin"

selene.toml

@@ -1,4 +0,0 @@
-std = "vim"
-
-[lints]
-multiple_statements = "allow"

shell.nix

@@ -0,0 +1,23 @@
+{
+  pkgs ?
+    import
+      # nixpkgs-unstable (neovim@0.11.2):
+      (fetchTarball {
+        url = "https://github.com/nixos/nixpkgs/archive/e4b09e47ace7d87de083786b404bf232eb6c89d8.tar.gz";
+        sha256 = "1a2qvp2yz8j1jcggl1yvqmdxicbdqq58nv7hihmw3bzg9cjyqm26";
+      })
+      { },
+}:
+pkgs.mkShell {
+  packages = [
+    pkgs.git
+    pkgs.gnumake
+    pkgs.lua-language-server
+    pkgs.lua51Packages.busted
+    pkgs.lua51Packages.luacov
+    pkgs.lua51Packages.luarocks
+    pkgs.lua51Packages.nlua
+    pkgs.neovim
+    pkgs.stylua
+  ];
+}

spec/withbuf.lua

@@ -1,3 +1,4 @@
+require 'luacov'
 local function withbuf(lines, f)
   vim.go.swapfile = false
 

vim.yml

@@ -1,36 +0,0 @@
----
-base: lua51
-globals:
-  vim:
-    any: true
-  assert.are.same:
-    args:
-      - type: any
-      - type: any
-  assert.are_not.same:
-    args:
-      - type: any
-      - type: any
-  assert.has.error:
-    args:
-      - type: any
-      - type: any
-  assert.is_true:
-    args:
-      - type: any
-      - type: any
-  assert.is_false:
-    args:
-      - type: any
-      - type: any
-  describe:
-    args:
-      - type: string
-      - type: function
-  it:
-    args:
-      - type: string
-      - type: function
-  before_each:
-    args:
-      - type: function