# encoding: ASCII
# zh-cn-autospace.rb
# @Author:      Thomas Link
# @Website:     http://deplate.sf.net/
# @License:     GPL (see http://www.gnu.org/licenses/gpl.txt)
# @Created:     01-Aug-2004.
# @Last Change: 2009-02-02.
# @Revision:    0.228

require 'deplate/zh_CN'

class Deplate::Formatter
    attr_reader :cjk_space, :cjk_nospace
    def hook_pre_setup_zh_cn_autospace
        @cjk_space   = ' '
        @cjk_nospace = ''
    end
end

class Deplate::Formatter::LaTeX
    def hook_pre_setup_zh_cn_autospace
        @cjk_space   = '~'
        @cjk_nospace = ' '
    end
end

class Deplate::Core
    @cjk_nonchars = '%c-%c' % [33, 0xA0]
    @cjk_rx_C = Regexp.new('[^%s]' % @cjk_nonchars)
    @cjk_rx_a = Regexp.new('[%s]' % @cjk_nonchars)
    class << self
        attr_reader :cjk_nonchars, :cjk_rx_a, :cjk_rx_C
    end

    def module_initialize_zh_cn_autospace
        class << self
            def join_particles(particles)
                acc  = []
                prev = ''
                prev_cjk = false
                particles.delete('')
                particles.each_with_index do |e, i|
                    if e == ' '
                        enext = particles[i + 1]
                        if prev == ' ' or enext == ' '
                        elsif @formatter.cjk_smart_blanks and prev =~ Deplate::Core.cjk_rx_C and enext =~ Deplate::Core.cjk_rx_C
                            acc << @formatter.cjk_nospace
                        else
                            acc << @formatter.cjk_space
                        end
                    else
                        acc << e
                        prev = e
                    end
                end
                return acc.join
            end
        end
    end

    def hook_pre_setup_zh_cn_particles
        register_particle(Deplate::Particle::Space)
        register_particle(Deplate::Particle::NonCJK)
    end

    def hook_late_require_zh_cn
        module_initialize_zh_cn_autospace
        call_methods_matching(@formatter, /^hook_pre_setup_zh_cn/)
    end
end

class Deplate::Element
    def join_lines(accum)
        result = ""
        accum.each do |line|
            if result != "" and result[-1] < 127
                result << ' '
            end
            result << line
        end
        return result
    end
end

class Deplate::Particle::Space < Deplate::Particle
    set_rx(/^ /)
    def setup
        @elt = ' '
    end
end

class Deplate::Particle::NonCJK < Deplate::Particle
    set_rx(/^([#{Deplate::Core.cjk_nonchars}])/o)
    @part = nil
    
    class << self
        attr_accessor :part
    end
    
    def setup
        @elt  = @match[0]
    end

    def process
        unless self.class.part
            particles = @@particles + @@particles_extended
            particles.delete(self.class)
            self.class.part = particles
        end
        @elt = @deplate.parse_with_particles(@container, @elt, self.class.part)
        @elt = @deplate.format_particles(@elt)
    end
end