Enable to change the background color of dialogs. (#413)

Author: pocari

lib/reline.rb

@@ -33,7 +33,18 @@ def match?(other)
     alias_method :==, :match?
   end
   CursorPos = Struct.new(:x, :y)
-  DialogRenderInfo = Struct.new(:pos, :contents, :bg_color, :width, :height, :scrollbar, keyword_init: true)
+  DialogRenderInfo = Struct.new(
+    :pos,
+    :contents,
+    :bg_color,
+    :pointer_bg_color,
+    :fg_color,
+    :pointer_fg_color,
+    :width,
+    :height,
+    :scrollbar,
+    keyword_init: true
+  )
 
   class Core
     ATTR_READER_NAMES = %i(
@@ -58,6 +69,19 @@ class Core
     attr_accessor :last_incremental_search
     attr_reader :output
 
+    extend Forwardable
+    def_delegators :config,
+      :autocompletion,
+      :autocompletion=,
+      :dialog_default_bg_color,
+      :dialog_default_bg_color=,
+      :dialog_default_fg_color,
+      :dialog_default_fg_color=,
+      :dialog_pointer_bg_color,
+      :dialog_pointer_bg_color=,
+      :dialog_pointer_fg_color,
+      :dialog_pointer_fg_color=
+
     def initialize
       self.output = STDOUT
       @dialog_proc_list = {}
@@ -123,14 +147,6 @@ def completion_proc=(p)
       @completion_proc = p
     end
 
-    def autocompletion
-      @config.autocompletion
-    end
-
-    def autocompletion=(val)
-      @config.autocompletion = val
-    end
-
     def output_modifier_proc=(p)
       raise ArgumentError unless p.respond_to?(:call) or p.nil?
       @output_modifier_proc = p
@@ -243,7 +259,16 @@ def get_screen_size
         context.push(cursor_pos_to_render, result, pointer, dialog)
       end
       dialog.pointer = pointer
-      DialogRenderInfo.new(pos: cursor_pos_to_render, contents: result, scrollbar: true, height: 15)
+      DialogRenderInfo.new(
+        pos: cursor_pos_to_render,
+        contents: result,
+        scrollbar: true,
+        height: 15,
+        bg_color: config.dialog_default_bg_color,
+        pointer_bg_color: config.dialog_pointer_bg_color,
+        fg_color: config.dialog_default_fg_color,
+        pointer_fg_color: config.dialog_pointer_fg_color
+      )
     }
     Reline::DEFAULT_DIALOG_CONTEXT = Array.new
 
@@ -528,6 +553,10 @@ def self.insert_text(*args, &block)
   def_single_delegators :core, :add_dialog_proc
   def_single_delegators :core, :dialog_proc
   def_single_delegators :core, :autocompletion, :autocompletion=
+  def_single_delegators :core, :dialog_default_bg_color, :dialog_default_bg_color=
+  def_single_delegators :core, :dialog_pointer_bg_color, :dialog_pointer_bg_color=
+  def_single_delegators :core, :dialog_default_fg_color, :dialog_default_fg_color=
+  def_single_delegators :core, :dialog_pointer_fg_color, :dialog_pointer_fg_color=
 
   def_single_delegators :core, :readmultiline
   def_instance_delegators self, :readmultiline
@@ -550,6 +579,10 @@ def self.core
       core.filename_quote_characters = ""
       core.special_prefixes = ""
       core.add_dialog_proc(:autocomplete, Reline::DEFAULT_DIALOG_PROC_AUTOCOMPLETE, Reline::DEFAULT_DIALOG_CONTEXT)
+      core.dialog_default_bg_color = 46 # Cyan
+      core.dialog_default_fg_color = 37 # White
+      core.dialog_pointer_bg_color = 45 # Magenta
+      core.dialog_pointer_fg_color = 37 # White
     }
   end
 

lib/reline/config.rb

@@ -45,6 +45,14 @@ class InvalidInputrc < RuntimeError
     attr_accessor v
   end
 
+  attr_accessor(
+    :autocompletion,
+    :dialog_default_bg_color,
+    :dialog_default_fg_color,
+    :dialog_pointer_bg_color,
+    :dialog_pointer_fg_color,
+  )
+
   def initialize
     @additional_key_bindings = {} # from inputrc
     @additional_key_bindings[:emacs] = {}
@@ -69,6 +77,10 @@ def initialize
     @test_mode = false
     @autocompletion = false
     @convert_meta = true if seven_bit_encoding?(Reline::IOGate.encoding)
+    @dialog_default_bg_color = nil
+    @dialog_pointer_bg_color = nil
+    @dialog_default_fg_color = nil
+    @dialog_pointer_fg_color = nil
   end
 
   def reset
@@ -94,14 +106,6 @@ def editing_mode_is?(*val)
     (val.respond_to?(:any?) ? val : [val]).any?(@editing_mode_label)
   end
 
-  def autocompletion=(val)
-    @autocompletion = val
-  end
-
-  def autocompletion
-    @autocompletion
-  end
-
   def keymap
     @key_actors[@keymap_label]
   end
@@ -334,6 +338,14 @@ def bind_variable(name, value)
       @vi_ins_mode_string = retrieve_string(value)
     when 'emacs-mode-string'
       @emacs_mode_string = retrieve_string(value)
+    when 'dialog-default-bg-color'
+      @dialog_default_bg_color = value.to_i
+    when 'dialog-pointer-bg-color'
+      @dialog_pointer_bg_color = value.to_i
+    when 'dialog-default-fg-color'
+      @dialog_default_fg_color = value.to_i
+    when 'dialog-pointer-fg-color'
+      @dialog_pointer_fg_color = value.to_i
     when *VARIABLE_NAMES then
       variable_name = :"@#{name.tr(?-, ?_)}"
       instance_variable_set(variable_name, value.nil? || value == '1' || value == 'on')

lib/reline/line_editor.rb

@@ -743,17 +743,15 @@ def add_dialog_proc(name, p, context = nil)
     Reline::IOGate.move_cursor_column(dialog.column)
     dialog.contents.each_with_index do |item, i|
       if i == pointer
-        bg_color = '45'
+        fg_color = dialog_render_info.pointer_fg_color
+        bg_color = dialog_render_info.pointer_bg_color
       else
-        if dialog_render_info.bg_color
-          bg_color = dialog_render_info.bg_color
-        else
-          bg_color = '46'
-        end
+        fg_color = dialog_render_info.fg_color
+        bg_color = dialog_render_info.bg_color
       end
       str_width = dialog.width - (dialog.scrollbar_pos.nil? ? 0 : @block_elem_width)
       str = padding_space_with_escape_sequences(Reline::Unicode.take_range(item, 0, str_width), str_width)
-      @output.write "\e[#{bg_color}m#{str}"
+      @output.write "\e[#{bg_color}m\e[#{fg_color}m#{str}"
       if dialog.scrollbar_pos and (dialog.scrollbar_pos != old_dialog.scrollbar_pos or dialog.column != old_dialog.column)
         @output.write "\e[37m"
         if dialog.scrollbar_pos <= (i * 2) and (i * 2 + 1) < (dialog.scrollbar_pos + bar_height)

test/reline/test_config.rb

@@ -408,4 +408,19 @@ def test_relative_xdg_config_home
     ENV['XDG_CONFIG_HOME'] = xdg_config_home_backup
     ENV['HOME'] = home_backup
   end
+
+  def test_dialog_configurations
+    @config.read_lines(<<~LINES.lines)
+      set dialog-default-bg-color 1
+      set dialog-pointer-bg-color 2
+      set dialog-default-fg-color 3
+      set dialog-pointer-fg-color 4
+    LINES
+
+    assert_equal 1, @config.dialog_default_bg_color
+    assert_equal 2, @config.dialog_pointer_bg_color
+    assert_equal 3, @config.dialog_default_fg_color
+    assert_equal 4, @config.dialog_pointer_fg_color
+  end
 end
+