Class: GetText::Tools::MsgMerge::Merger

Inherits:
Object
  • Object
show all
Defined in:
lib/gettext/tools/msgmerge.rb

Overview

:nodoc:

Constant Summary collapse

POT_DATE_EXTRACT_RE =

Merge the reference with the definition: take the #. and #: comments from the reference, take the # comments from the definition, take the msgstr from the definition. Add this merged entry to the output message list.

/POT-Creation-Date:\s*(.*)?\s*$/
POT_DATE_RE = 
/POT-Creation-Date:.*?$/
MAX_FUZZY_DISTANCE =

XXX: make sure that its value is proper.

0.5

Instance Method Summary collapse

Instance Method Details

#add_obsolete_entry(result, definition) ⇒ Object 



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# File 'lib/gettext/tools/msgmerge.rb', line 158

def add_obsolete_entry(result, definition)
  obsolete_entry = generate_obsolete_entry(result, definition)
  unless obsolete_entry.nil?
    result[:last] = obsolete_entry
  end
  result
end

#extract_obsolete_entries(result, definition) ⇒ Object 



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# File 'lib/gettext/tools/msgmerge.rb', line 183

def extract_obsolete_entries(result, definition)
  obsolete_entries = []
  definition.each do |entry|
    id = [entry.msgctxt, entry.msgid]
    if not result.has_key?(*id) and not entry.msgid == :last
      obsolete_entries << entry
    end
  end
  obsolete_entries
end

#find_by_msgid(entries, msgid) ⇒ Object 



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# File 'lib/gettext/tools/msgmerge.rb', line 114

def find_by_msgid(entries, msgid)
  same_msgid_entries = entries.find_all do |entry|
    entry.msgid == msgid
  end
  same_msgid_entries = same_msgid_entries.sort_by do |entry|
    entry.msgctxt
  end
  same_msgid_entries.first
end

#find_fuzzy_entry(definition, msgid, msgctxt) ⇒ Object 



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# File 'lib/gettext/tools/msgmerge.rb', line 132

def find_fuzzy_entry(definition, msgid, msgctxt)
  return nil if msgid == :last
  min_distance_entry = nil
  min_distance = MAX_FUZZY_DISTANCE

  same_msgctxt_entries = definition.find_all do |entry|
    entry.msgctxt == msgctxt and not entry.msgid == :last
  end
  same_msgctxt_entries.each do |entry|
    distance = normalize_distance(entry.msgid, msgid)
    if min_distance > distance
      min_distance = distance
      min_distance_entry = entry
    end
  end

  min_distance_entry
end

#generate_obsolete_entry(result, definition) ⇒ Object 



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# File 'lib/gettext/tools/msgmerge.rb', line 166

def generate_obsolete_entry(result, definition)
  obsolete_entry = nil

  obsolete_entries = extract_obsolete_entries(result, definition)
  unless obsolete_entries.empty?
    obsolete_comment = []

    obsolete_entries.each do |entry|
      obsolete_comment << entry.to_s
    end
    obsolete_entry = POEntry.new(:normal)
    obsolete_entry.msgid = :last
    obsolete_entry.comment = obsolete_comment.join("\n")
  end
  obsolete_entry
end

#merge(definition, reference) ⇒ Object 



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# File 'lib/gettext/tools/msgmerge.rb', line 41

def merge(definition, reference)
  result = GetText::PO.new

  translated_entries = definition.reject do |entry|
    entry.msgstr.nil?
  end

  reference.each do |entry|
    msgid = entry.msgid
    msgctxt = entry.msgctxt
    id = [msgctxt, msgid]

    if definition.has_key?(*id)
      result[*id] = merge_entry(definition[*id], entry)
      next
    end

    if msgctxt.nil?
      same_msgid_entry = find_by_msgid(translated_entries, msgid)
      if not same_msgid_entry.nil? and not same_msgid_entry.msgctxt.nil?
        result[nil, msgid] = merge_fuzzy_entry(same_msgid_entry, entry)
        next
      end
    end

    fuzzy_entry = find_fuzzy_entry(translated_entries, msgid, msgctxt)
    unless fuzzy_entry.nil?
      result[*id] = merge_fuzzy_entry(fuzzy_entry, entry)
      next
    end

    result[*id] = entry
  end

  add_obsolete_entry(result, translated_entries)
  result
end

#merge_entry(definition_entry, reference_entry) ⇒ Object 



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# File 'lib/gettext/tools/msgmerge.rb', line 79

def merge_entry(definition_entry, reference_entry)
  if definition_entry.msgid.empty? and definition_entry.msgctxt.nil?
    new_header = merge_header(definition_entry, reference_entry)
    return new_header
  end

  if definition_entry.flag == "fuzzy"
    entry = definition_entry
    entry.flag = "fuzzy"
    return entry
  end

  entry = reference_entry
  entry.translator_comment = definition_entry.translator_comment
  entry.previous = nil

  unless definition_entry.msgid_plural == reference_entry.msgid_plural
    entry.flag = "fuzzy"
  end

  entry.msgstr = definition_entry.msgstr
  entry
end

#merge_fuzzy_entry(fuzzy_entry, entry) ⇒ Object 



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# File 'lib/gettext/tools/msgmerge.rb', line 124

def merge_fuzzy_entry(fuzzy_entry, entry)
  merged_entry = merge_entry(fuzzy_entry, entry)
  merged_entry.flag = "fuzzy"
  merged_entry
end

#merge_header(old_header, new_header) ⇒ Object 



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# File 'lib/gettext/tools/msgmerge.rb', line 103

def merge_header(old_header, new_header)
  header = old_header
  if POT_DATE_EXTRACT_RE =~ new_header.msgstr
    create_date = $1
    pot_creation_date = "POT-Creation-Date: #{create_date}"
    header.msgstr = header.msgstr.gsub(POT_DATE_RE, pot_creation_date)
  end
  header.flag = nil
  header
end

#normalize_distance(source, destination) ⇒ Object 



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# File 'lib/gettext/tools/msgmerge.rb', line 151

def normalize_distance(source, destination)
  max_size = [source.size, destination.size].max

  return 0.0 if max_size.zero?
  Text::Levenshtein.distance(source, destination) / max_size.to_f
end