Class: Deplate::SkeletonExpander

Inherits:
CommonObject show all
Defined in:
lib/deplate/skeletons.rb

Overview

Skeletons:

Instance Method Summary collapse

Methods inherited from CommonObject

class_attribute, class_attributes, class_attributes=, class_attributes_ensure, class_meta_attributes, inherited, method_missing, respond_to?

Constructor Details

#initialize(deplate) ⇒ SkeletonExpander

Returns a new instance of SkeletonExpander.



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# File 'lib/deplate/skeletons.rb', line 11

def initialize(deplate)
    @deplate        = deplate
    @formatter      = deplate.formatter
    @formatter_name = @formatter.class.myname
    @max_iteration  = 5
    @skeletons      = deplate.options.skeletons
    @skeletons_tmpl = {}
    @skel_ids       = {}
    @skel_names     = @skeletons.collect {|n| Regexp.escape(n)}.join('|')
    @rx = Deplate::Rx.builder("\\{\\{((#@skel_names)\\b(?>\\\\\\{|\\\\\\}|\\\\\\\\|[^{}]+?|{#})*)\\}\\}|^[[:blank:]]+", 
                              Regexp::MULTILINE, 5, false)
    srand(Time.now.to_i)
end

Instance Method Details

#expand(string, source = nil, iterations = @max_iteration) ⇒ Object 



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# File 'lib/deplate/skeletons.rb', line 47

def expand(string, source=nil, iterations=@max_iteration)
    if string.empty?
        return string
    end
    expanded = false
    indent   = ''
    string.gsub!(@rx) do |s|
        text = $1
        if text
            expansion = expand_skeleton(text, indent, source)
            if expansion
                expanded ||= true
                expansion
            else
                text
            end
        else
            indent = s
        end
    end
    if expanded and iterations > 0
        return expand(string, source, iterations - 1)
    else
        return string
    end
end

#expand_skeleton(string, indent = '', source = nil) ⇒ Object 



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# File 'lib/deplate/skeletons.rb', line 88

def expand_skeleton(string, indent='', source=nil)
    name, args = split_name_args(string)
    if @skeletons.include?(name)
        special = "skeleton_#{name}"
        text    = if respond_to?(special)
                      send(special, args)
                  else
                      skeleton = require_skeleton(name, source)
                      if skeleton
                          tmpl  = Deplate::Template.new(:template => skeleton, 
                                                        :source   => source)
                          accum = Deplate::Define.let_variables(@deplate, args) do
                              tmpl.fill_in(@deplate, :source => source)
                          end
                          accum.flatten!
                          accum.join("\n")
                      else
                          nil
                      end
                  end
        if text
            return @formatter.indent_text(text, :hanging => true, :indenttail => indent)
        end
    end
    return nil
end

#load_skeleton(name) ⇒ Object 



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# File 'lib/deplate/skeletons.rb', line 37

def load_skeleton(name)
    # tmpl = @deplate.skeletons[name]
    tmpl = @deplate.find_in_lib(name, :pwd => true)
    if tmpl and File.exist?(tmpl)
        t = File.open(tmpl) {|io| io.read}
        return t
    end
    return nil
end

#require_skeleton(name, source = nil) ⇒ Object 



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# File 'lib/deplate/skeletons.rb', line 25

def require_skeleton(name, source=nil)
    skels = @skeletons_tmpl[@formatter_name] ||= {}
    # names = @deplate.formatter_family_members.collect {|f| "#{name}.#{f}"}
    # names = @deplate.formatter.formatter_family_members.collect {|f| "#{name}.#{f}"}
    # names << name
    # names.each do |name|
        t = skels[name] ||= load_skeleton(name)
        return t if t
    # end
    Deplate::Core.log(['Unknown skeleton', name], :error, source)
end

#skeleton_id(args) ⇒ Object 



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# File 'lib/deplate/skeletons.rb', line 115

def skeleton_id(args)
    name = args['name'] || args['id'] || args['@body']
    sep  = '_' * (4 + rand(4))
    # rid  = Time.now.to_f
    rid  = '%x' % rand.to_s[2..-1].to_i
    @skel_ids[name] ||= [sep, name, rid, sep].join('_')
    return @skel_ids[name]
end

#split_name_args(string) ⇒ Object 



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# File 'lib/deplate/skeletons.rb', line 74

def split_name_args(string)
    m    = Regexp.new("^(#@skel_names)\s*").match(string)
    name = m[1]
    args = m.post_match.strip
    if args
        args = Deplate::Core.remove_backslashes(args)
        args, body = @deplate.input.parse_args(args)
        args['@body'] = body
    else
        args = {}
    end
    return name, args
end