feature/open in new tab

doc/carbon.txt

@@ -299,6 +299,15 @@ PLUGS                                                               *carbon-plug
   This mapping will never exit Neovim completely. See |carbon-carbon-quit| for
   more technical details.
 
+  `------------------------------------------------------------------------------`
+  <Plug>(carbon-tabe)                                           *carbon-plug-tabe*
+
+  Implementation: `require('carbon').tabe()`
+  Mapping:        |carbon-setting-actions-tabe|
+
+  If the entry below the cursor is a directory, show that directory in a
+  Carbon buffer in a new tab. Otherwise the file is opened in a new tab.
+
   `------------------------------------------------------------------------------`
   <Plug>(carbon-edit)                                           *carbon-plug-edit*
 
@@ -2100,6 +2109,7 @@ SETTINGS                                                         *carbon-setting
   `  actions = {`
   `    up               = `|carbon-setting-actions-up|`,`
   `    down             = `|carbon-setting-actions-down|`,`
+  `    tabe             = `|carbon-setting-actions-tabe|`,`
   `    edit             = `|carbon-setting-actions-edit|`,`
   `    reset            = `|carbon-setting-actions-reset|`,`
   `    split            = `|carbon-setting-actions-split|`,`
@@ -2369,6 +2379,7 @@ SETTINGS                                                         *carbon-setting
     `  up = '[',`                                        *carbon-setting-actions-up*
     `  down = ']',`                                    *carbon-setting-actions-down*
     `  quit = 'q',`                                    *carbon-setting-actions-quit*
+    `  tabe = '<c-t>',`                                *carbon-setting-actions-tabe*
     `  edit = '<cr>',`                                 *carbon-setting-actions-edit*
     `  move = 'm',`                                    *carbon-setting-actions-move*
     `  reset = 'u',`                                  *carbon-setting-actions-reset*

lua/carbon/init.lua

@@ -147,6 +147,16 @@ function carbon.toggle_recursive()
   end)
 end
 
+function carbon.tabe()
+  view.execute(function(ctx)
+    view.handle_sidebar_or_float()
+    vim.cmd.tabedit({
+      ctx.cursor.line.entry.path,
+      mods = { keepalt = #vim.fn.getreg('#') ~= 0 },
+    })
+  end)
+end
+
 function carbon.edit()
   view.execute(function(ctx)
     if ctx.cursor.line.entry.is_directory then

lua/carbon/settings.lua

@@ -54,6 +54,7 @@ local defaults = {
     up = '[',
     down = ']',
     quit = 'q',
+    tabe = '<c-t>',
     edit = '<cr>',
     move = 'm',
     reset = 'u',

test/specs/carbon_spec.lua

@@ -84,6 +84,36 @@ describe('carbon', function()
     end)
   end)
 
+  describe('tabe', function()
+    it('opens directories in new tab', function()
+      assert.equal(#vim.api.nvim_list_tabpages(), 1)
+
+      util.cursor(4, 1)
+      carbon.tabe()
+
+      assert.equal('carbon.explorer', vim.bo.filetype)
+      assert.equal(#vim.api.nvim_list_tabpages(), 2)
+
+      vim.cmd.tabclose()
+
+      assert.equal(#vim.api.nvim_list_tabpages(), 1)
+    end)
+
+    it('opens files in a new tab', function()
+      assert.equal(#vim.api.nvim_list_tabpages(), 1)
+
+      util.cursor(12, 1)
+      carbon.tabe()
+
+      assert.equal('toml', vim.bo.filetype)
+      assert.equal(#vim.api.nvim_list_tabpages(), 2)
+
+      vim.cmd.tabclose()
+
+      assert.equal(#vim.api.nvim_list_tabpages(), 1)
+    end)
+  end)
+
   describe('edit', function()
     it('toggles directory when on directory', function()
       local doc_entry = helpers.entry('doc')