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Merge pull request #287 from aycabta/add-terminfo-support
Add terminfo support
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Original file line number | Diff line number | Diff line change |
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require 'fiddle' | ||
require 'fiddle/import' | ||
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module Reline::Terminfo | ||
extend Fiddle::Importer | ||
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class TerminfoError < StandardError; end | ||
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@curses_dl = nil | ||
def self.curses_dl | ||
return @curses_dl if @curses_dl | ||
if Fiddle.const_defined?(:VERSION) and Gem::Version.create(Fiddle::VERSION) >= Gem::Version.create('1.0.1') | ||
# Fiddle::TYPE_VARIADIC is supported from Fiddle 1.0.1. | ||
%w[libncursesw.so libcursesw.so libncurses.so libcurses.so].each do |curses_name| | ||
result = Fiddle::Handle.new(curses_name) | ||
rescue Fiddle::DLError | ||
next | ||
else | ||
@curses_dl = result | ||
break | ||
end | ||
end | ||
@curses_dl | ||
end | ||
end | ||
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module Reline::Terminfo | ||
dlload curses_dl | ||
#extern 'int setupterm(char *term, int fildes, int *errret)' | ||
@setupterm = Fiddle::Function.new(curses_dl['setupterm'], [Fiddle::TYPE_VOIDP, Fiddle::TYPE_INT, Fiddle::TYPE_VOIDP], Fiddle::TYPE_INT) | ||
#extern 'char *tigetstr(char *capname)' | ||
@tigetstr = Fiddle::Function.new(curses_dl['tigetstr'], [Fiddle::TYPE_VOIDP], Fiddle::TYPE_VOIDP) | ||
#extern 'char *tiparm(const char *str, ...)' | ||
@tiparm = Fiddle::Function.new(curses_dl['tiparm'], [Fiddle::TYPE_VOIDP, Fiddle::TYPE_VARIADIC], Fiddle::TYPE_VOIDP) | ||
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def self.setupterm(term, fildes) | ||
errret_int = String.new("\x00" * 8, encoding: 'ASCII-8BIT') | ||
ret = @setupterm.(term, fildes, errret_int) | ||
errret = errret_int.unpack('i')[0] | ||
case ret | ||
when 0 # OK | ||
0 | ||
when -1 # ERR | ||
case errret | ||
when 1 | ||
raise TerminfoError.new('The terminal is hardcopy, cannot be used for curses applications.') | ||
when 0 | ||
raise TerminfoError.new('The terminal could not be found, or that it is a generic type, having too little information for curses applications to run.') | ||
when -1 | ||
raise TerminfoError.new('The terminfo database could not be found.') | ||
else # unknown | ||
-1 | ||
end | ||
else # unknown | ||
-2 | ||
end | ||
end | ||
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def self.tigetstr(capname) | ||
result = @tigetstr.(capname).to_s | ||
def result.tiparm(*args) # for method chain | ||
Reline::Terminfo.tiparm(self, *args) | ||
end | ||
result | ||
end | ||
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def self.tiparm(str, *args) | ||
new_args = [] | ||
args.each do |a| | ||
new_args << Fiddle::TYPE_INT << a | ||
end | ||
@tiparm.(str, *new_args).to_s | ||
end | ||
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def self.enabled? | ||
true | ||
end | ||
end if Reline::Terminfo.curses_dl | ||
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module Reline::Terminfo | ||
def self.enabled? | ||
false | ||
end | ||
end unless Reline::Terminfo.curses_dl |