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140 lines
3.6 KiB
140 lines
3.6 KiB
#-- encoding: UTF-8
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#-- copyright
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# OpenProject is a project management system.
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# Copyright (C) 2012-2017 the OpenProject Foundation (OPF)
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License version 3.
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#
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# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
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# Copyright (C) 2006-2017 Jean-Philippe Lang
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# Copyright (C) 2010-2013 the ChiliProject Team
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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# See doc/COPYRIGHT.rdoc for more details.
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#++
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require 'redcloth3'
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module RedCloth3Patch
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def self.included(base)
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base.send(:include, InstanceMethods)
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base.class_eval do
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alias_method_chain :block_textile_prefix, :numbering
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end
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end
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module InstanceMethods
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private
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def block_textile_prefix_with_numbering(text)
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text.replace(prepend_number_to_heading(text))
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block_textile_prefix_without_numbering(text)
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end
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HEADING = /^h(\d)\.(.*)$/ unless defined? HEADING
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NUMBERED_HEADING = /^h(\d)#\.(.*)$/ unless defined? NUMBERED_HEADING
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def prepend_number_to_heading(text)
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if text =~ NUMBERED_HEADING
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level = $1.to_i
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number = get_next_number_or_start_new_numbering level
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new_text = "h#{level}. #{number}#{$2}"
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elsif text =~ HEADING
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reset_numbering
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end
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new_text.nil? ? text : new_text
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end
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def get_next_number_or_start_new_numbering(level)
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begin
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number = get_number_for_level level
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rescue ArgumentError
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reset_numbering
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number = get_number_for_level level
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end
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number
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end
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def get_number_for_level(level)
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@numbering_provider ||= Redcloth3::NumberingStack.new level
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@numbering_provider.get_next_numbering_for_level level
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end
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def reset_numbering
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@numbering_provider = nil
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end
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end
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end
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RedCloth3.send(:include, RedCloth3Patch)
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module Redcloth3
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class NumberingStack
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def initialize(level)
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@stack = []
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@init_level = level ? level.to_i : 1
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end
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def get_next_numbering_for_level(level)
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internal_level = map_external_to_internal_level level
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increase_numbering_for_level internal_level
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current_numbering
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end
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private
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def increase_numbering_for_level(level)
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if @stack[level].nil?
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@stack[level] = 1
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fill_nil_levels_with_zero
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else
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@stack[level] += 1
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reset_higher_levels_than level
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end
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@stack[level]
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end
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def reset_higher_levels_than(level)
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@stack = @stack.slice! 0, level + 1
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end
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def current_numbering
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@stack.join('.') + '.'
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end
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def map_external_to_internal_level(level)
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if level.to_i < @init_level
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raise ArgumentError, 'Current level lower than initial level'
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end
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level.to_i - @init_level
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end
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def fill_nil_levels_with_zero
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@stack.map! { |e| e.nil? ? 0 : e }
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end
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end
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end
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