116 lines
3.0 KiB
Ruby
116 lines
3.0 KiB
Ruby
require 'jekyll/convertible'
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require 'forwardable'
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module Jekyll
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class Excerpt
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include Convertible
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extend Forwardable
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attr_accessor :post
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attr_accessor :content, :output, :ext
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def_delegator :@post, :site, :site
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def_delegator :@post, :name, :name
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def_delegator :@post, :ext, :ext
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# Initialize this Post instance.
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#
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# site - The Site.
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# base - The String path to the dir containing the post file.
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# name - The String filename of the post file.
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#
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# Returns the new Post.
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def initialize(post)
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self.post = post
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self.content = extract_excerpt(post.content)
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end
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def to_liquid
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post.to_liquid(Post::EXCERPT_ATTRIBUTES_FOR_LIQUID)
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end
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# Fetch YAML front-matter data from related post, without layout key
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#
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# Returns Hash of post data
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def data
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@data ||= post.data.dup
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@data.delete("layout")
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@data
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end
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# 'Path' of the excerpt.
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#
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# Returns the path for the post this excerpt belongs to with #excerpt appended
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def path
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File.join(post.path, "#excerpt")
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end
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# Check if excerpt includes a string
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#
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# Returns true if the string passed in
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def include?(something)
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(output && output.include?(something)) || content.include?(something)
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end
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# The UID for this post (useful in feeds).
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# e.g. /2008/11/05/my-awesome-post
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#
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# Returns the String UID.
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def id
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File.join(post.dir, post.slug, "#excerpt")
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end
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def to_s
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output || content
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end
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# Returns the shorthand String identifier of this Post.
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def inspect
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"<Excerpt: #{self.id}>"
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end
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protected
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# Internal: Extract excerpt from the content
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#
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# By default excerpt is your first paragraph of a post: everything before
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# the first two new lines:
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#
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# ---
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# title: Example
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# ---
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#
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# First paragraph with [link][1].
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#
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# Second paragraph.
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#
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# [1]: http://example.com/
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#
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# This is fairly good option for Markdown and Textile files. But might cause
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# problems for HTML posts (which is quite unusual for Jekyll). If default
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# excerpt delimiter is not good for you, you might want to set your own via
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# configuration option `excerpt_separator`. For example, following is a good
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# alternative for HTML posts:
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#
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# # file: _config.yml
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# excerpt_separator: "<!-- more -->"
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#
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# Notice that all markdown-style link references will be appended to the
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# excerpt. So the example post above will have this excerpt source:
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#
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# First paragraph with [link][1].
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#
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# [1]: http://example.com/
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#
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# Excerpts are rendered same time as content is rendered.
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#
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# Returns excerpt String
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def extract_excerpt(post_content)
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separator = site.config['excerpt_separator']
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head, _, tail = post_content.partition(separator)
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"" << head << "\n\n" << tail.scan(/^\[[^\]]+\]:.+$/).join("\n")
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end
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end
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end
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