[ruby/reline] Implement bracketed paste insert

(https://github.com/ruby/reline/pull/655)

https://github.com/ruby/reline/commit/e92dcbf514

lib/reline.rb

@@ -312,6 +312,10 @@ module Reline
         $stderr.sync = true
         $stderr.puts "Reline is used by #{Process.pid}"
       end
+      unless config.test_mode or config.loaded?
+        config.read
+        io_gate.set_default_key_bindings(config)
+      end
       otio = io_gate.prep
 
       may_req_ambiguous_char_width
@@ -338,11 +342,6 @@ module Reline
         end
       end
 
-      unless config.test_mode or config.loaded?
-        config.read
-        io_gate.set_default_key_bindings(config)
-      end
-
       line_editor.print_nomultiline_prompt(prompt)
       line_editor.update_dialogs
       line_editor.rerender
@@ -352,7 +351,15 @@ module Reline
         loop do
           read_io(config.keyseq_timeout) { |inputs|
             line_editor.set_pasting_state(io_gate.in_pasting?)
-            inputs.each { |key| line_editor.update(key) }
+            inputs.each do |key|
+              if key.char == :bracketed_paste_start
+                text = io_gate.read_bracketed_paste
+                line_editor.insert_pasted_text(text)
+                line_editor.scroll_into_view
+              else
+                line_editor.update(key)
+              end
+            end
           }
           if line_editor.finished?
             line_editor.render_finished

lib/reline/ansi.rb

@@ -45,6 +45,7 @@ class Reline::ANSI
   end
 
   def self.set_default_key_bindings(config, allow_terminfo: true)
+    set_bracketed_paste_key_bindings(config)
     set_default_key_bindings_ansi_cursor(config)
     if allow_terminfo && Reline::Terminfo.enabled?
       set_default_key_bindings_terminfo(config)
@@ -66,6 +67,12 @@ class Reline::ANSI
     end
   end
 
+  def self.set_bracketed_paste_key_bindings(config)
+    [:emacs, :vi_insert, :vi_command].each do |keymap|
+      config.add_default_key_binding_by_keymap(keymap, START_BRACKETED_PASTE.bytes, :bracketed_paste_start)
+    end
+  end
+
   def self.set_default_key_bindings_ansi_cursor(config)
     ANSI_CURSOR_KEY_BINDINGS.each do |char, (default_func, modifiers)|
       bindings = [["\e[#{char}", default_func]] # CSI + char
@@ -178,46 +185,26 @@ class Reline::ANSI
     nil
   end
 
-  @@in_bracketed_paste_mode = false
-  START_BRACKETED_PASTE = String.new("\e[200~,", encoding: Encoding::ASCII_8BIT)
-  END_BRACKETED_PASTE = String.new("\e[200~.", encoding: Encoding::ASCII_8BIT)
-  def self.getc_with_bracketed_paste(timeout_second)
+  START_BRACKETED_PASTE = String.new("\e[200~", encoding: Encoding::ASCII_8BIT)
+  END_BRACKETED_PASTE = String.new("\e[201~", encoding: Encoding::ASCII_8BIT)
+  def self.read_bracketed_paste
     buffer = String.new(encoding: Encoding::ASCII_8BIT)
-    buffer << inner_getc(timeout_second)
-    while START_BRACKETED_PASTE.start_with?(buffer) or END_BRACKETED_PASTE.start_with?(buffer) do
-      if START_BRACKETED_PASTE == buffer
-        @@in_bracketed_paste_mode = true
-        return inner_getc(timeout_second)
-      elsif END_BRACKETED_PASTE == buffer
-        @@in_bracketed_paste_mode = false
-        ungetc(-1)
-        return inner_getc(timeout_second)
-      end
-      succ_c = inner_getc(Reline.core.config.keyseq_timeout)
-
-      if succ_c
-        buffer << succ_c
-      else
-        break
-      end
+    until buffer.end_with?(END_BRACKETED_PASTE)
+      c = inner_getc(Float::INFINITY)
+      break unless c
+      buffer << c
     end
-    buffer.bytes.reverse_each do |ch|
-      ungetc ch
-    end
-    inner_getc(timeout_second)
+    string = buffer.delete_suffix(END_BRACKETED_PASTE).force_encoding(encoding)
+    string.valid_encoding? ? string : ''
   end
 
   # if the usage expects to wait indefinitely, use Float::INFINITY for timeout_second
   def self.getc(timeout_second)
-    if Reline.core.config.enable_bracketed_paste
-      getc_with_bracketed_paste(timeout_second)
-    else
-      inner_getc(timeout_second)
-    end
+    inner_getc(timeout_second)
   end
 
   def self.in_pasting?
-    @@in_bracketed_paste_mode or (not empty_buffer?)
+    not empty_buffer?
   end
 
   def self.empty_buffer?
@@ -361,11 +348,15 @@ class Reline::ANSI
   end
 
   def self.prep
+    # Enable bracketed paste
+    @@output.write "\e[?2004h" if Reline.core.config.enable_bracketed_paste
     retrieve_keybuffer
     nil
   end
 
   def self.deprep(otio)
+    # Disable bracketed paste
+    @@output.write "\e[?2004l" if Reline.core.config.enable_bracketed_paste
     Signal.trap('WINCH', @@old_winch_handler) if @@old_winch_handler
   end
 end

lib/reline/config.rb

@@ -51,6 +51,7 @@ class Reline::Config
     @autocompletion = false
     @convert_meta = true if seven_bit_encoding?(Reline::IOGate.encoding)
     @loaded = false
+    @enable_bracketed_paste = true
   end
 
   def reset

lib/reline/line_editor.rb

@@ -283,7 +283,7 @@ class Reline::LineEditor
           indent1 = @auto_indent_proc.(@buffer_of_lines.take(@line_index - 1).push(''), @line_index - 1, 0, true)
           indent2 = @auto_indent_proc.(@buffer_of_lines.take(@line_index), @line_index - 1, @buffer_of_lines[@line_index - 1].bytesize, false)
           indent = indent2 || indent1
-          @buffer_of_lines[@line_index - 1] = ' ' * indent + @buffer_of_lines[@line_index - 1].gsub(/\A */, '')
+          @buffer_of_lines[@line_index - 1] = ' ' * indent + @buffer_of_lines[@line_index - 1].gsub(/\A\s*/, '')
         )
         process_auto_indent @line_index, add_newline: true
       else
@@ -1305,6 +1305,16 @@ class Reline::LineEditor
     @confirm_multiline_termination_proc.(temp_buffer.join("\n") + "\n")
   end
 
+  def insert_pasted_text(text)
+    pre = @buffer_of_lines[@line_index].byteslice(0, @byte_pointer)
+    post = @buffer_of_lines[@line_index].byteslice(@byte_pointer..)
+    lines = (pre + text.gsub(/\r\n?/, "\n") + post).split("\n", -1)
+    lines << '' if lines.empty?
+    @buffer_of_lines[@line_index, 1] = lines
+    @line_index += lines.size - 1
+    @byte_pointer = @buffer_of_lines[@line_index].bytesize - post.bytesize
+  end
+
   def insert_text(text)
     if @buffer_of_lines[@line_index].bytesize == @byte_pointer
       @buffer_of_lines[@line_index] += text

lib/reline/unicode.rb

@@ -43,11 +43,13 @@ class Reline::Unicode
 
   def self.escape_for_print(str)
     str.chars.map! { |gr|
-      escaped = EscapedPairs[gr.ord]
-      if escaped && gr != -"\n" && gr != -"\t"
-        escaped
-      else
+      case gr
+      when -"\n"
         gr
+      when -"\t"
+        -'  '
+      else
+        EscapedPairs[gr.ord] || gr
       end
     }.join
   end

test/reline/yamatanooroti/test_rendering.rb

@@ -543,15 +543,10 @@ begin
       EOC
     end
 
-    def test_enable_bracketed_paste
+    def test_bracketed_paste
       omit if Reline.core.io_gate.win?
-      write_inputrc <<~LINES
-        set enable-bracketed-paste on
-      LINES
       start_terminal(5, 30, %W{ruby -I#{@pwd}/lib #{@pwd}/test/reline/yamatanooroti/multiline_repl}, startup_message: 'Multiline REPL.')
-      write("\e[200~,")
-      write("def hoge\n  3\nend")
-      write("\e[200~.")
+      write("\e[200~def hoge\r\t3\rend\e[201~")
       close
       assert_screen(<<~EOC)
         Multiline REPL.