getch with timeout

Author: gurgeous

justfile

@@ -16,7 +16,7 @@ coverage:
   open /tmp/coverage/index.html
 
 # format with rubocop
-format: (lint "-a")
+fmt: (lint "-a")
 
 gem-local:
   just banner rake install:local...

lib/table_tennis/util/console.rb

@@ -10,7 +10,7 @@ def winsize(...)
       end
 
       # not supported, don't call these
-      %i[fileno getbyte raw syswrite].each do |name|
+      %i[fileno getch raw syswrite].each do |name|
         define_method(name) do |*args, **kwargs, &block|
           if !IO.console
             raise "IO.console.#{name} not supported when IO.console is nil"

lib/table_tennis/util/termbg.rb

@@ -118,18 +118,18 @@ def osc_query(attr)
       def read_term_response
         # fast forward to ESC
         loop do
-          return if !(ch = Util::Console.getbyte&.chr)
+          return if !(ch = getch)
           break ch if ch == ESC
         end
         # next char should be either [ or ]
-        return if !(type = Util::Console.getbyte&.chr)
+        return if !(type = getch)
         return if !(type == "[" || type == "]")
 
         # now read the response. note that the response can end in different ways
         # and we have to check for all of them
         buf = "#{ESC}#{type}"
         loop do
-          return if !(ch = Util::Console.getbyte&.chr)
+          return if !(ch = getch)
           buf << ch
           break if type == "[" && buf.end_with?("R")
           break if type == "]" && buf.end_with?(BEL, ST)
@@ -138,6 +138,10 @@ def read_term_response
       end
       private_class_method :read_term_response
 
+      # get the next character, with a 100ms timeout
+      def getch = Util::Console.getch(min: 0, time: 0.1)
+      private_class_method :read_term_response
+
       #
       # color math
       #
@@ -205,7 +209,9 @@ def env_colorfgbg(env = ENV["COLORFGBG"])
       private_class_method :env_colorfgbg
 
       def debug(s)
-        puts "termbg: #{s}" if ENV["TT_DEBUG"]
+        return if !ENV["TT_DEBUG"]
+        $stderr.write "termbg: #{s}\r\n"
+        $stderr.flush
       end
       private_class_method :debug
     end

test/test_helper.rb

@@ -89,7 +89,7 @@ def with_env(env, &block)
 
 class FakeConsole
   def fileno = 123
-  def getbyte = fakeread.shift
+  def getch(...) = fakeread.shift&.chr
   def raw = yield
   def syswrite(str) = fakewrite << str
   def winsize = [24, 80]