summaryrefslogtreecommitdiff
path: root/jni/ruby/lib/irb/ext/history.rb
diff options
context:
space:
mode:
authorJari Vetoniemi <jari.vetoniemi@indooratlas.com>2020-03-16 18:49:26 +0900
committerJari Vetoniemi <jari.vetoniemi@indooratlas.com>2020-03-30 00:39:06 +0900
commitfcbf63e62c627deae76c1b8cb8c0876c536ed811 (patch)
tree64cb17de3f41a2b6fef2368028fbd00349946994 /jni/ruby/lib/irb/ext/history.rb
Fresh start
Diffstat (limited to 'jni/ruby/lib/irb/ext/history.rb')
-rw-r--r--jni/ruby/lib/irb/ext/history.rb118
1 files changed, 118 insertions, 0 deletions
diff --git a/jni/ruby/lib/irb/ext/history.rb b/jni/ruby/lib/irb/ext/history.rb
new file mode 100644
index 0000000..f21795e
--- /dev/null
+++ b/jni/ruby/lib/irb/ext/history.rb
@@ -0,0 +1,118 @@
+#
+# history.rb -
+# $Release Version: 0.9.6$
+# $Revision: 47266 $
+# by Keiju ISHITSUKA(keiju@ruby-lang.org)
+#
+# --
+#
+#
+#
+
+module IRB # :nodoc:
+
+ class Context
+
+ NOPRINTING_IVARS.push "@eval_history_values"
+
+ # See #set_last_value
+ alias _set_last_value set_last_value
+
+ def set_last_value(value)
+ _set_last_value(value)
+
+ if @eval_history
+ @eval_history_values.push @line_no, @last_value
+ @workspace.evaluate self, "__ = IRB.CurrentContext.instance_eval{@eval_history_values}"
+ end
+
+ @last_value
+ end
+
+ # The command result history limit.
+ attr_reader :eval_history
+ # Sets command result history limit.
+ #
+ # +no+ is an Integer or +nil+.
+ #
+ # Returns +no+ of history items if greater than 0.
+ #
+ # If +no+ is 0, the number of history items is unlimited.
+ #
+ # If +no+ is +nil+, execution result history isn't used (default).
+ def eval_history=(no)
+ if no
+ if defined?(@eval_history) && @eval_history
+ @eval_history_values.size(no)
+ else
+ @eval_history_values = History.new(no)
+ IRB.conf[:__TMP__EHV__] = @eval_history_values
+ @workspace.evaluate(self, "__ = IRB.conf[:__TMP__EHV__]")
+ IRB.conf.delete(:__TMP_EHV__)
+ end
+ else
+ @eval_history_values = nil
+ end
+ @eval_history = no
+ end
+ end
+
+ class History # :nodoc:
+
+ def initialize(size = 16)
+ @size = size
+ @contents = []
+ end
+
+ def size(size)
+ if size != 0 && size < @size
+ @contents = @contents[@size - size .. @size]
+ end
+ @size = size
+ end
+
+ def [](idx)
+ begin
+ if idx >= 0
+ @contents.find{|no, val| no == idx}[1]
+ else
+ @contents[idx][1]
+ end
+ rescue NameError
+ nil
+ end
+ end
+
+ def push(no, val)
+ @contents.push [no, val]
+ @contents.shift if @size != 0 && @contents.size > @size
+ end
+
+ alias real_inspect inspect
+
+ def inspect
+ if @contents.empty?
+ return real_inspect
+ end
+
+ unless (last = @contents.pop)[1].equal?(self)
+ @contents.push last
+ last = nil
+ end
+ str = @contents.collect{|no, val|
+ if val.equal?(self)
+ "#{no} ...self-history..."
+ else
+ "#{no} #{val.inspect}"
+ end
+ }.join("\n")
+ if str == ""
+ str = "Empty."
+ end
+ @contents.push last if last
+ str
+ end
+ end
+end
+
+