Add WezTerm multiplex support to navigation bindings

lua/plugins/mux.lua

@@ -0,0 +1,64 @@
+return {
+  'numToStr/Navigator.nvim',
+  config = function()
+    local navigator = require('Navigator')
+    navigator.setup({
+      disable_on_zoom = true,
+    })
+
+    local augroup = vim.api.nvim_create_augroup('mux', { clear = true })
+    if vim.env.TMUX ~= nil then
+      -- Integrate tmux navigation flag
+      local navigation_flag =
+          '@vim' .. vim.fn.substitute(vim.env.TMUX_PANE, '%', '\\%', 'g')
+      local function set_navigation_flag()
+        vim.fn.system('tmux set-window-option ' .. navigation_flag .. ' 1')
+      end
+      local function unset_navigation_flag()
+        -- FIXME: Due to a regression this causes SIGABRT when RelWithDebInfo
+        -- vim.fn.system('tmux set-window-option -u ' .. navigation_flag)
+        -- https://github.com/neovim/neovim/issues/21856 contains a workaround
+        vim.fn.jobstart(
+          'tmux set-window-option -u ' .. navigation_flag, { detach = true })
+      end
+
+      -- [Un]set tmux window option to detect when to change pane.
+      set_navigation_flag()
+      vim.api.nvim_create_autocmd('FocusGained', {
+        pattern = '*', group = augroup, callback = set_navigation_flag,
+      })
+      vim.api.nvim_create_autocmd('VimLeave', {
+        pattern = '*', group = augroup, callback = unset_navigation_flag,
+      })
+    elseif vim.env.TERM_PROGRAM ~= nil and vim.env.TERM_PROGRAM == 'WezTerm' then
+      local function set_wezterm_user_var(in_vim)
+        local value = in_vim and '1' or '0'
+        local template = "\x1b]1337;SetUserVar=%s=%s\a"
+        local command = template:format('vim', vim.base64.encode(tostring(value)))
+        vim.api.nvim_chan_send(vim.v.stderr, command)
+      end
+
+      vim.api.nvim_create_autocmd({ 'VimEnter', 'VimResume' }, {
+        pattern = '*',
+        group = augroup,
+        callback = function()
+          set_wezterm_user_var(true)
+        end,
+      })
+
+      vim.api.nvim_create_autocmd({ 'VimLeave', 'VimSuspend' }, {
+        pattern = '*',
+        group = augroup,
+        callback = function()
+          set_wezterm_user_var(false)
+        end,
+      })
+    end
+
+    -- Map nativation bindings
+    vim.keymap.set('n', "<C-h>", navigator.left)
+    vim.keymap.set('n', "<C-j>", navigator.down)
+    vim.keymap.set('n', "<C-k>", navigator.up)
+    vim.keymap.set('n', "<C-l>", navigator.right)
+  end
+}

lua/plugins/tmux.lua

@@ -1,39 +0,0 @@
-return {
-  'alexghergh/nvim-tmux-navigation',
-  config = function()
-    local plugin = require('nvim-tmux-navigation')
-    plugin.setup({
-      disable_when_zoomed = true,
-    })
-
-    -- Integrate tmux navigation flag
-    local navigation_flag =
-      '@vim' .. vim.fn.substitute(vim.env.TMUX_PANE, '%', '\\%', 'g')
-    local function set_navigation_flag()
-      vim.fn.system('tmux set-window-option ' .. navigation_flag .. ' 1')
-    end
-    local function unset_navigation_flag()
-      -- FIXME: Due to a regression this causes SIGABRT when RelWithDebInfo
-      -- vim.fn.system('tmux set-window-option -u ' .. navigation_flag)
-      -- https://github.com/neovim/neovim/issues/21856 contains a workaround
-      vim.fn.jobstart(
-        'tmux set-window-option -u ' .. navigation_flag, { detach = true})
-    end
-
-    -- [Un]set tmux window option to detect when to change pane.
-    set_navigation_flag()
-    local augroup = vim.api.nvim_create_augroup('tmux', { clear = true })
-    vim.api.nvim_create_autocmd('FocusGained', {
-      pattern = '*', group = augroup, callback = set_navigation_flag,
-    })
-    vim.api.nvim_create_autocmd('VimLeave', {
-      pattern = '*', group = augroup, callback = unset_navigation_flag,
-    })
-
-    -- Map nativation bindings
-    vim.keymap.set('n', "<C-h>", plugin.NvimTmuxNavigateLeft)
-    vim.keymap.set('n', "<C-j>", plugin.NvimTmuxNavigateDown)
-    vim.keymap.set('n', "<C-k>", plugin.NvimTmuxNavigateUp)
-    vim.keymap.set('n', "<C-l>", plugin.NvimTmuxNavigateRight)
-  end
-}