| # |
| # Licensed to the Apache Software Foundation (ASF) under one or more |
| # contributor license agreements. See the NOTICE file distributed with |
| # this work for additional information regarding copyright ownership. |
| # The ASF licenses this file to You under the Apache License, Version 2.0 |
| # (the "License"); you may not use this file except in compliance with |
| # the License. You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| # |
| |
| module TableOfContentsHelpers |
| def table_of_contents(resource) |
| content = remove_front_matter_data(File.read(resource.source_file)) |
| extension = File.extname(resource.source_file)[1..-1] # Trim the first dot. |
| |
| if extension != 'md' |
| # Render other extensions first if they exist. |
| template = Tilt[extension].new { content } |
| content = template.render(self, resource.data) |
| end |
| |
| # Now the custom Markdown TOC. |
| markdown = Redcarpet::Markdown.new(Redcarpet::Render::HTML_TOC.new(nesting_level: 2)) |
| # TOC gets confused with Ruby comments inside code blocks so we removed them. |
| content_without_code = content.gsub(/(```[\s\S]*?```)/, '') |
| output = markdown.render(content_without_code) |
| |
| if output.length == 0 |
| return |
| else |
| content_tag :aside, output, id: 'table-of-contents' |
| end |
| end |
| |
| private |
| |
| def remove_front_matter_data(content) |
| yaml_regex = /\A(---\s*\n.*?\n?)^((---|\.\.\.)\s*$\n?)/m |
| if content =~ yaml_regex |
| content = content.sub(yaml_regex, '') |
| end |
| |
| json_regex = /\A(;;;\s*\n.*?\n?)^(;;;\s*$\n?)/m |
| if content =~ json_regex |
| content = content.sub(json_regex, '') |
| end |
| |
| content |
| end |
| end |