Fusion of HTMLDocument and Hypertext
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| class HTMLDocument | |
| ENTITIES = { | |
| "'" => ''', | |
| '&' => '&', | |
| '"' => '"', | |
| '<' => '<', | |
| '>' => '>', | |
| } | |
| def initialize(indent = " ", level = 0) | |
| @doc = "" | |
| @indent = indent | |
| @level = level | |
| yield self if block_given? | |
| end | |
| def text(string) | |
| @doc << "#{@indent * @level}#{escape(string)}\n" | |
| end | |
| def el(type, attrs={}) | |
| indentation = @indent * @level | |
| if block_given? | |
| @doc << "#{indentation}<#{type}#{attributes(attrs)}>\n" | |
| @level += 1 | |
| yield | |
| @level -= 1 | |
| @doc << "#{indentation}</#{type}>\n" | |
| else | |
| @doc << "#{indentation}<#{type}#{attributes(attrs)} />\n" | |
| end | |
| end | |
| def to_s | |
| @doc | |
| end | |
| def attributes(attrs) | |
| attrs.map do |key, value| | |
| case value | |
| when false | |
| when true | |
| %[ #{key}] | |
| else | |
| %[ #{key}="#{escape(value.to_s)}"] | |
| end | |
| end.join | |
| end | |
| def escape(str) | |
| str.gsub(/['&\"<>]/, ENTITIES) | |
| end | |
| end | |
| doc = HTMLDocument.new do |d| | |
| d.el :html, lang: "en-GB" do | |
| d.el :head do | |
| d.el :title do | |
| d.text "Hello, World!" | |
| end | |
| end | |
| d.el :body do | |
| d.el :input, { type: "text" } | |
| end | |
| end | |
| end | |
| puts doc.to_s | |
| #=> | |
| # <html lang="en-GB"> | |
| # <head> | |
| # <title> | |
| # Hello, World! | |
| # </title> | |
| # </head> | |
| # <body> | |
| # <input type="text" /> | |
| # </body> | |
| # </html> |
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