instiki/lib/maruku/errors_management.rb

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2007-01-22 15:36:51 +01:00
#--
# Copyright (C) 2006 Andrea Censi <andrea (at) rubyforge.org>
#
# This file is part of Maruku.
#
# Maruku is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# Maruku is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Maruku; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#++
#m Any method that detects formatting error calls the
#m maruku_error() method.
#m if @meta[:on_error] ==
#m
#m - :warning write on the standard err (or @error_stream if defined),
#m then do your best.
#m - :ignore be shy and try to continue
#m - :raise raises a MarukuException
#m
#m default is :raise
module MaRuKu
class Exception < RuntimeError
end
module Errors
def maruku_error(s,src=nil,con=nil)
policy = get_setting(:on_error)
case policy
when :ignore
when :raise
raise_error create_frame(describe_error(s,src,con))
when :warning
tell_user create_frame(describe_error(s,src,con))
else
raise "BugBug: policy = #{policy.inspect}"
end
end
def maruku_recover(s,src=nil,con=nil)
tell_user create_frame(describe_error(s,src,con))
end
alias error maruku_error
def raise_error(s)
raise MaRuKu::Exception, s, caller
end
def tell_user(s)
error_stream = self.attributes[:error_stream] || $stderr
error_stream << s
end
def create_frame(s)
n = 75
"\n" +
" "+"_"*n + "\n"+
"| Maruku tells you:\n" +
"+" + ("-"*n) +"\n"+
add_tabs(s,1,'| ') + "\n" +
"+" + ("-"*n) + "\n" +
add_tabs(caller[0, 5].join("\n"),1,'!') + "\n" +
"\\" + ("_"*n) + "\n"
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end
def describe_error(s,src,con)
t = s
src && (t += "\n#{src.describe}\n")
con && (t += "\n#{con.describe}\n")
t
end
end # Errors
end # MaRuKu