feat: ctrl-n or keymap to switch between windows (#20)

Author: sheldonth

lua/goose/api.lua

@@ -63,6 +63,35 @@ function M.select_session()
   return true
 end
 
+function M.toggle_pane()
+  if not state.windows then
+    core.open({ new_session = false, focus = "output" })
+    return true
+  end
+
+  local current_win = vim.api.nvim_get_current_win()
+  if current_win == state.windows.input_win then
+    -- When moving from input to output, exit insert mode first
+    vim.cmd('stopinsert')
+    vim.api.nvim_set_current_win(state.windows.output_win)
+  else
+    -- When moving from output to input, just change window
+    -- (don't automatically enter insert mode)
+    vim.api.nvim_set_current_win(state.windows.input_win)
+    
+    -- Fix placeholder text when switching to input window
+    local lines = vim.api.nvim_buf_get_lines(state.windows.input_buf, 0, -1, false)
+    if #lines == 1 and lines[1] == "" then
+      -- Only show placeholder if the buffer is empty
+      require('goose.ui.window_config').setup_placeholder(state.windows)
+    else
+      -- Clear placeholder if there's text in the buffer
+      vim.api.nvim_buf_clear_namespace(state.windows.input_buf, vim.api.nvim_create_namespace('input-placeholder'), 0, -1)
+    end
+  end
+  return true
+end
+
 -- Command definitions that call the API functions
 M.commands = {
   open_input = {
@@ -121,6 +150,14 @@ M.commands = {
     end
   },
 
+  toggle_pane = {
+    name = "GooseTogglePane",
+    desc = "Toggle between input and output panes",
+    fn = function()
+      M.toggle_pane()
+    end
+  },
+
   run = {
     name = "GooseRun",
     desc = "Run Goose with a prompt (continue last session)",

lua/goose/config.lua

@@ -19,7 +19,8 @@ M.defaults = {
       stop = '<C-c>',
       next_message = ']]',
       prev_message = '[[',
-      mention_file = '@'
+      mention_file = '@',
+      toggle_pane = '<C-n>'
     }
   },
   ui = {

lua/goose/ui/window_config.lua

@@ -48,7 +48,6 @@ function M.setup_autocmds(windows)
     group = group,
     buffer = windows.output_buf,
     callback = function()
-      M.setup_placeholder(windows)
       vim.cmd('stopinsert')
     end
   })
@@ -57,7 +56,18 @@ function M.setup_autocmds(windows)
   vim.api.nvim_create_autocmd('WinEnter', {
     group = group,
     buffer = windows.input_buf,
-    callback = function() vim.cmd('startinsert') end
+    callback = function() 
+      -- Don't automatically enter insert mode when switching windows
+      -- Check if the buffer has content
+      local lines = vim.api.nvim_buf_get_lines(windows.input_buf, 0, -1, false)
+      if #lines == 1 and lines[1] == "" then
+        -- Only show placeholder if the buffer is empty
+        M.setup_placeholder(windows)
+      else
+        -- Clear placeholder if there's text in the buffer
+        vim.api.nvim_buf_clear_namespace(windows.input_buf, vim.api.nvim_create_namespace('input-placeholder'), 0, -1)
+      end
+    end
   })
 
   vim.api.nvim_create_autocmd({ 'TextChanged', 'TextChangedI' }, {
@@ -198,6 +208,15 @@ function M.setup_keymaps(windows)
   vim.keymap.set('i', window_keymap.mention_file, function()
     require('goose.core').add_file_to_context()
   end, { buffer = windows.input_buf, silent = true })
+
+  -- Add toggle pane keymapping for both buffers in normal and insert mode
+  vim.keymap.set({ 'n', 'i' }, window_keymap.toggle_pane, function()
+    api.toggle_pane()
+  end, { buffer = windows.input_buf, silent = true })
+
+  vim.keymap.set({ 'n', 'i' }, window_keymap.toggle_pane, function()
+    api.toggle_pane()
+  end, { buffer = windows.output_buf, silent = true })
 end
 
 return M