release 1.12.1

[descalc.git] / 05_disp_stdout.pm

diff --git a/05_disp_stdout.pm b/05_disp_stdout.pm
new file mode 100644 (file)
index 0000000..07be1da
--- /dev/null
+++ b/05_disp_stdout.pm
@@ -0,0 +1,62 @@
+# console output for DCT, by Shiar
+
+# 1.12.0 200411032130 - handle input via Term::ReadKey; define main loop
+# 1.11.0 200410152225 - class in file name, so check is not needed anymore
+# 1.10.1 200410142200 - startup message omitted (now shown by main)
+# 1.10.0 200410140120 - never clear screen (just let it scroll)
+#                     - try to get width/height from environment vars
+#                     - use escape sequences for clear/reposition/invert
+#                     - print everything to STDOUT
+
+use strict;
+use warnings;
+
+use Term::ReadKey;
+
+push @{$hook{init}}, sub {
+       ReadMode 3;  # cbreak mode
+
+#      print "\ec";  # reset (clear screen, go home)
+#      print "\e[4mDCT $::VERSION\e[24m ";  # print intro (underlined)
+       END {
+               ReadMode 0;
+               print "\n";
+       }
+
+       $set{height} = $ENV{LINES}-2 if $ENV{LINES} and $ENV{LINES}>=3;
+       $set{width} = $ENV{COLUMNS} if $ENV{COLUMNS};
+}; # init
+
+push @{$hook{showerror}}, sub {
+       print "\n\a\e[7m$_[0]\e[27m";  # bell and reverse video
+}; # showerror
+
+push @{$hook{showstack}}, sub {
+       for (reverse 0..@stack-1) {
+               print "\n$_: ", showval($stack[$_], $set{base});
+       } # show stack
+       print "\n> ";  # prompt
+}; # showstack
+
+push @{$hook{showentry}}, sub {
+       print "\e[3G\e[K", $_[0];  # cursor to column #3; erase line
+}; # showentry
+
+$hook{main} = sub {
+       while (1) {
+               draw();
+
+               my $key = ReadKey;  # wait for user input
+               if ($key eq chr 27) {
+                       $key .= $_ while defined ($_ = ReadKey(-1));  # read additional keys
+               } # escape sequence
+               onkey($key);
+       } # input loop
+}; # main
+
+return {
+       author  => "Shiar",
+       title   => "console output",
+       version => "1.12",
+};
+