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Contents
require 'stringio'
module Redwood
## a variant of text mode that allows the user to automatically follow text,
## and respawns when << is called if necessary.
class LogMode < TextMode
register_keymap do |k|
k.add :toggle_follow, "Toggle follow mode", 'f'
end
## if buffer_name is supplied, this mode will spawn a buffer
## upon receiving the << message. otherwise, it will act like
## a regular buffer.
def initialize autospawn_buffer_name=nil
@follow = true
@autospawn_buffer_name = autospawn_buffer_name
@on_kill = []
super()
end
## register callbacks for when the buffer is killed
def on_kill &b; @on_kill << b end
def toggle_follow
@follow = !@follow
if @follow
jump_to_line(lines - buffer.content_height + 1) # leave an empty line at bottom
end
buffer.mark_dirty
end
def << s
if buffer.nil? && @autospawn_buffer_name
BufferManager.spawn @autospawn_buffer_name, self, :hidden => true, :system => true
end
s.split("\n").each { |l| super(l + "\n") } # insane. different << semantics.
if @follow
follow_top = lines - buffer.content_height + 1
jump_to_line follow_top if topline < follow_top
end
end
def status
super + " (follow: #@follow)"
end
def cleanup
@on_kill.each { |cb| cb.call self }
self.text = ""
super
end
end
end
Version data entries
32 entries across 32 versions & 1 rubygems