Qiita Markdown
Qiita-specified markdown processor.
- Markdown conversion
- Sanitization
- Code and language detection
- Task list
- ToC
- Emoji
- Syntax highlighting
- Mention
- Footnotes
- Note notation's custom block
Basic Usage
Qiita::Markdown::Processor provides markdown rendering logic.
processor = Qiita::Markdown::Processor.new(hostname: "example.com")
processor.call(markdown)
# => {
# codes: [
# {
# code: "1 + 1\n",
# language: "ruby",
# filename: "example.rb",
# },
# ],
# mentioned_usernames: [
# "alice",
# "bob",
# ],
# output: "<h1>Example</h1>\n...",
# }Filters
Qiita Markdown is built on jch/html-pipeline. Add your favorite html-pipeline-compatible filters.
processor = Qiita::Markdown::Processor.new(hostname: "example.com")
processor.filters << HTML::Pipeline::ImageMaxWidthFilter
processor.call(text)Context
.new and #call can take optional context as a Hash with following keys:
:allowed_usernames - A list of usernames allowed to be username. (Array<String>)
:asset_path - URL path to link to emoji sprite. (String)
:asset_root - Base URL to link to emoji sprite. (String)
:base_url - Used to construct links to user profile pages for each. (String)
:default_language - Default language used if no language detected from code. (String)
:emoji_names - A list of allowed emoji names. (Array<String>)
:emoji_url_generator - #call'able object that accepts emoji name as argument and returns emoji image URL. (#call)
The original implementation is used when the generator returned a falsey value.
:hostname - FQDN. Used to check whether or not each URL of `href` attributes is external site. (String)
:inline_code_color_class_name - Class name for inline code color. (String)
:language_aliases - Alias table for some language names. (Hash)
:markdown - A hash for enabling / disabling optional Markdown syntax. (Hash)
Currently :footnotes (default: true) and :sourcepos (defalut: false) are supported.
For more information on these options, please see [increments/qiita_marker](https://github.com/increments/qiita_marker).
:rule - Sanitization rule table. (Hash)
:script - A flag to allow to embed script element. (Boolean)
processor = Qiita::Markdown::Processor.new(asset_root: "http://example.com/assets", hostname: "example.com")
processor.call(text)Rendering Summary
There's another processor Qiita::Markdown::SummaryProcessor, which is for rendering a summary of markdown document. It simplifies a document by removing complex markups and also truncates it to a specific length without breaking the document structure.
Note that this processor does not produce the :codes output in contrast to the Processor.
Context
SummaryProcessor accepts the following context in addition to the Processor's context:
{
truncate: {
length: 100, # Documents will be truncated if it exceeds this character count. (Integer)
omission: 'β¦' # A string added to the end of document when it's truncated. (String, nil)
}
}processor = Qiita::Markdown::SummaryProcessor.new(truncate: { length: 80 }, hostname: "example.com")
processor.call(text)