68 lines
1.8 KiB
Markdown
68 lines
1.8 KiB
Markdown
# Manually Creating Documents
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Besides being able to parse documents, Oga also allows you to create documents
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manually. This can be useful if you want to dynamically generate XML/HTML.
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Documents can be greated in two ways:
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1. Full blown documents (using {Oga::XML::Document})
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2. XML fragments (using just {Oga::XML::Element} and the likes)
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For example, lets create a document with a specific encoding and a single
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element:
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xml_decl = Oga::XML::XmlDeclaration.new(:encoding => 'UTF-16')
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document = Oga::XML::Document.new(:xml_declaration => xml_decl)
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element = Oga::XML::Element.new(:name => 'example')
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document.children << element
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If you now serialize this back to XML (by calling `document.to_xml`) you'd get
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the following XML:
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<?xml version="1.0" encoding="UTF-16" ?>
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<example />
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You can also serialize elements on their own:
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element.to_xml
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This would output:
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<example />
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## Adding/Removing Attributes
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The easiest way to add (or remove) attributes is by using {Oga::XML::Element#set}
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and {Oga::XML::Element#unset}. For example, to add an attribute:
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element = Oga::XML::Element.new(:name => 'example')
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element.set('class', 'foo')
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element.to_xml # => "<example class=\"foo\" />"
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And to remove an attribute:
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element.unset('class')
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## Modifying Text
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Modifying text of elements can be done in two ways:
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1. Adding {Oga::XML::Text} instances to the list of child nodes of an
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{Oga::XML::Element} instance
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2. Using {Oga::XML::Element#inner\_text=}
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The second option is the easiest and recommended way of doing this. Usage is
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quite simple:
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element = Oga::XML::Element.new(:name => 'p')
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element.inner_text = 'Hello'
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element.to_xml => "<p>Hello</p>"
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Special characters such as `&` and `<` are escaped automatically when calling
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{Oga::XML::Element#to_xml}.
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