Handle mode condition in inputrc

lib/reline/config.rb

@@ -210,6 +210,7 @@ def read_lines(lines, file = nil)
         next
       when /\s*("#{KEYSEQ_PATTERN}+")\s*:\s*(.*)\s*$/o
         key, func_name = $1, $2
+        func_name = func_name.split.first
         keystroke, func = bind_key(key, func_name)
         next unless keystroke
         @additional_key_bindings[@keymap_label][@keymap_prefix + keystroke] = func
@@ -226,7 +227,13 @@ def handle_directive(directive, file, no, if_stack)
     when 'if'
       condition = false
       case args
-      when 'mode'
+      when /^mode=(vi|emacs)$/i
+        mode = $1.downcase
+        # NOTE: mode=vi means vi-insert mode
+        mode = 'vi_insert' if mode == 'vi'
+        if @editing_mode_label == mode.to_sym
+          condition = true
+        end
       when 'term'
       when 'version'
       else # application name

test/reline/test_config.rb

@@ -275,6 +275,78 @@ def test_unmatched_endif
     assert_equal "INPUTRC:1: unmatched endif", e.message
   end
 
+  def test_if_with_mode
+    @config.read_lines(<<~LINES.lines)
+      $if mode=emacs
+        "\C-e": history-search-backward # comment
+      $else
+        "\C-f": history-search-forward
+      $endif
+    LINES
+
+    assert_equal({[5] => :history_search_backward}, @config.instance_variable_get(:@additional_key_bindings)[:emacs])
+    assert_equal({}, @config.instance_variable_get(:@additional_key_bindings)[:vi_insert])
+    assert_equal({}, @config.instance_variable_get(:@additional_key_bindings)[:vi_command])
+  end
+
+  def test_else
+    @config.read_lines(<<~LINES.lines)
+      $if mode=vi
+        "\C-e": history-search-backward # comment
+      $else
+        "\C-f": history-search-forward
+      $endif
+    LINES
+
+    assert_equal({[6] => :history_search_forward}, @config.instance_variable_get(:@additional_key_bindings)[:emacs])
+    assert_equal({}, @config.instance_variable_get(:@additional_key_bindings)[:vi_insert])
+    assert_equal({}, @config.instance_variable_get(:@additional_key_bindings)[:vi_command])
+  end
+
+  def test_if_with_invalid_mode
+    @config.read_lines(<<~LINES.lines)
+      $if mode=vim
+        "\C-e": history-search-backward
+      $else
+        "\C-f": history-search-forward # comment
+      $endif
+    LINES
+
+    assert_equal({[6] => :history_search_forward}, @config.instance_variable_get(:@additional_key_bindings)[:emacs])
+    assert_equal({}, @config.instance_variable_get(:@additional_key_bindings)[:vi_insert])
+    assert_equal({}, @config.instance_variable_get(:@additional_key_bindings)[:vi_command])
+  end
+
+  def test_mode_label_differs_from_keymap_label
+    @config.read_lines(<<~LINES.lines)
+      # Sets mode_label and keymap_label to vi
+      set editing-mode vi
+      # Change keymap_label to emacs. mode_label is still vi.
+      set keymap emacs
+      # condition=true because current mode_label is vi
+      $if mode=vi
+        # sets keybinding to current keymap_label=emacs
+        "\C-e": history-search-backward
+      $endif
+    LINES
+    assert_equal({[5] => :history_search_backward}, @config.instance_variable_get(:@additional_key_bindings)[:emacs])
+    assert_equal({}, @config.instance_variable_get(:@additional_key_bindings)[:vi_insert])
+    assert_equal({}, @config.instance_variable_get(:@additional_key_bindings)[:vi_command])
+  end
+
+  def test_if_without_else_condition
+    @config.read_lines(<<~LINES.lines)
+      set editing-mode vi
+      $if mode=vi
+        "\C-e": history-search-backward
+      $endif
+    LINES
+
+    assert_equal({}, @config.instance_variable_get(:@additional_key_bindings)[:emacs])
+    assert_equal({[5] => :history_search_backward}, @config.instance_variable_get(:@additional_key_bindings)[:vi_insert])
+    assert_equal({}, @config.instance_variable_get(:@additional_key_bindings)[:vi_command])
+  end
+
   def test_default_key_bindings
     @config.add_default_key_binding('abcd'.bytes, 'EFGH'.bytes)
     @config.read_lines(<<~'LINES'.lines)