[ruby/reline] Handle INT signal correctly, remove handle_cleared

because clear(C-l) is not a signal
(https://github.com/ruby/reline/pull/646)

https://github.com/ruby/reline/commit/3debb0ae2f

lib/reline.rb

@@ -254,32 +254,35 @@ module Reline
     Reline::DEFAULT_DIALOG_CONTEXT = Array.new
 
     def readmultiline(prompt = '', add_hist = false, &confirm_multiline_termination)
+      unless confirm_multiline_termination
+        raise ArgumentError.new('#readmultiline needs block to confirm multiline termination')
+      end
+
       Reline.update_iogate
       io_gate.with_raw_input do
-        unless confirm_multiline_termination
-          raise ArgumentError.new('#readmultiline needs block to confirm multiline termination')
-        end
         inner_readline(prompt, add_hist, true, &confirm_multiline_termination)
+      end
 
-        whole_buffer = line_editor.whole_buffer.dup
-        whole_buffer.taint if RUBY_VERSION < '2.7'
-        if add_hist and whole_buffer and whole_buffer.chomp("\n").size > 0
-          Reline::HISTORY << whole_buffer
-        end
+      whole_buffer = line_editor.whole_buffer.dup
+      whole_buffer.taint if RUBY_VERSION < '2.7'
+      if add_hist and whole_buffer and whole_buffer.chomp("\n").size > 0
+        Reline::HISTORY << whole_buffer
+      end
 
-        if line_editor.eof?
-          line_editor.reset_line
-          # Return nil if the input is aborted by C-d.
-          nil
-        else
-          whole_buffer
-        end
+      if line_editor.eof?
+        line_editor.reset_line
+        # Return nil if the input is aborted by C-d.
+        nil
+      else
+        whole_buffer
       end
     end
 
     def readline(prompt = '', add_hist = false)
       Reline.update_iogate
-      inner_readline(prompt, add_hist, false)
+      io_gate.with_raw_input do
+        inner_readline(prompt, add_hist, false)
+      end
 
       line = line_editor.line.dup
       line.taint if RUBY_VERSION < '2.7'

lib/reline/ansi.rb

@@ -151,7 +151,11 @@ class Reline::ANSI
   end
 
   def self.with_raw_input
-    @@input.raw { yield }
+    if @@input.tty?
+      @@input.raw(intr: true) { yield }
+    else
+      yield
+    end
   end
 
   @@buf = []
@@ -159,11 +163,13 @@ class Reline::ANSI
     unless @@buf.empty?
       return @@buf.shift
     end
-    until c = @@input.raw(intr: true) { @@input.wait_readable(0.1) && @@input.getbyte }
-      timeout_second -= 0.1
+    until @@input.wait_readable(0.01)
+      timeout_second -= 0.01
       return nil if timeout_second <= 0
-      Reline.core.line_editor.resize
+
+      Reline.core.line_editor.handle_signal
     end
+    c = @@input.getbyte
     (c == 0x16 && @@input.raw(min: 0, time: 0, &:getbyte)) || c
   rescue Errno::EIO
     # Maybe the I/O has been closed.

lib/reline/general_io.rb

@@ -46,6 +46,7 @@ class Reline::GeneralIO
     end
     c = nil
     loop do
+      Reline.core.line_editor.handle_signal
       result = @@input.wait_readable(0.1)
       next if result.nil?
       c = @@input.read(1)

lib/reline/line_editor.rb

@@ -138,9 +138,6 @@ class Reline::LineEditor
     @screen_size = Reline::IOGate.get_screen_size
     reset_variables(prompt, encoding: encoding)
     @rendered_screen.base_y = Reline::IOGate.cursor_pos.y
-    Reline::IOGate.set_winch_handler do
-      @resized = true
-    end
     if ENV.key?('RELINE_ALT_SCROLLBAR')
       @full_block = '::'
       @upper_half_block = "''"
@@ -164,7 +161,12 @@ class Reline::LineEditor
     end
   end
 
-  def resize
+  def handle_signal
+    handle_interrupted
+    handle_resized
+  end
+
+  private def handle_resized
     return unless @resized
 
     @screen_size = Reline::IOGate.get_screen_size
@@ -177,25 +179,35 @@ class Reline::LineEditor
     render_differential
   end
 
+  private def handle_interrupted
+    return unless @interrupted
+
+    @interrupted = false
+    clear_dialogs
+    scrolldown = render_differential
+    Reline::IOGate.scroll_down scrolldown
+    Reline::IOGate.move_cursor_column 0
+    @rendered_screen.lines = []
+    @rendered_screen.cursor_y = 0
+    case @old_trap
+    when 'DEFAULT', 'SYSTEM_DEFAULT'
+      raise Interrupt
+    when 'IGNORE'
+      # Do nothing
+    when 'EXIT'
+      exit
+    else
+      @old_trap.call if @old_trap.respond_to?(:call)
+    end
+  end
+
   def set_signal_handlers
-    @old_trap = Signal.trap('INT') {
-      clear_dialogs
-      scrolldown = render_differential
-      Reline::IOGate.scroll_down scrolldown
-      Reline::IOGate.move_cursor_column 0
-      @rendered_screen.lines = []
-      @rendered_screen.cursor_y = 0
-      case @old_trap
-      when 'DEFAULT', 'SYSTEM_DEFAULT'
-        raise Interrupt
-      when 'IGNORE'
-        # Do nothing
-      when 'EXIT'
-        exit
-      else
-        @old_trap.call if @old_trap.respond_to?(:call)
-      end
-    }
+    Reline::IOGate.set_winch_handler do
+      @resized = true
+    end
+    @old_trap = Signal.trap('INT') do
+      @interrupted = true
+    end
   end
 
   def finalize
@@ -212,7 +224,6 @@ class Reline::LineEditor
     @encoding = encoding
     @is_multiline = false
     @finished = false
-    @cleared = false
     @history_pointer = nil
     @kill_ring ||= Reline::KillRing.new
     @vi_clipboard = ''
@@ -234,6 +245,7 @@ class Reline::LineEditor
     @in_pasting = false
     @auto_indent_proc = nil
     @dialogs = []
+    @interrupted = false
     @resized = false
     @cache = {}
     @rendered_screen = RenderedScreen.new(base_y: 0, lines: [], cursor_y: 0)
@@ -541,19 +553,7 @@ class Reline::LineEditor
     screen_height - wrapped_cursor_y + screen_scroll_top - @rendered_screen.base_y - 1
   end
 
-  def handle_cleared
-    return unless @cleared
-
-    @cleared = false
-    Reline::IOGate.clear_screen
-    @screen_size = Reline::IOGate.get_screen_size
-    @rendered_screen.lines = []
-    @rendered_screen.base_y = 0
-    @rendered_screen.cursor_y = 0
-  end
-
   def rerender
-    handle_cleared
     render_differential unless @in_pasting
   end
 
@@ -2074,7 +2074,11 @@ class Reline::LineEditor
   alias_method :yank_pop, :em_yank_pop
 
   private def ed_clear_screen(key)
-    @cleared = true
+    Reline::IOGate.clear_screen
+    @screen_size = Reline::IOGate.get_screen_size
+    @rendered_screen.lines = []
+    @rendered_screen.base_y = 0
+    @rendered_screen.cursor_y = 0
   end
   alias_method :clear_screen, :ed_clear_screen
 

lib/reline/windows.rb

@@ -259,7 +259,7 @@ class Reline::Windows
   def self.check_input_event
     num_of_events = 0.chr * 8
     while @@output_buf.empty?
-      Reline.core.line_editor.resize
+      Reline.core.line_editor.handle_signal
       if @@WaitForSingleObject.(@@hConsoleInputHandle, 100) != 0 # max 0.1 sec
         # prevent for background consolemode change
         @@legacy_console = (getconsolemode() & ENABLE_VIRTUAL_TERMINAL_PROCESSING == 0)

test/reline/test_key_actor_emacs.rb

@@ -255,18 +255,18 @@ class Reline::KeyActor::Emacs::Test < Reline::TestCase
   end
 
   def test_ed_clear_screen
-    refute(@line_editor.instance_variable_get(:@cleared))
+    @line_editor.instance_variable_get(:@rendered_screen).lines = [[]]
     input_keys("\C-l", false)
-    assert(@line_editor.instance_variable_get(:@cleared))
+    assert_empty(@line_editor.instance_variable_get(:@rendered_screen).lines)
   end
 
   def test_ed_clear_screen_with_inputed
     input_keys('abc')
     input_keys("\C-b", false)
-    refute(@line_editor.instance_variable_get(:@cleared))
+    @line_editor.instance_variable_get(:@rendered_screen).lines = [[]]
     assert_line_around_cursor('ab', 'c')
     input_keys("\C-l", false)
-    assert(@line_editor.instance_variable_get(:@cleared))
+    assert_empty(@line_editor.instance_variable_get(:@rendered_screen).lines)
     assert_line_around_cursor('ab', 'c')
   end