80 lines
2.6 KiB
Ruby
80 lines
2.6 KiB
Ruby
module SimpleForm
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module Wrappers
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# Provides the builder syntax for components. The builder provides
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# three methods `use`, `optional` and `wrapper` and they allow the following invocations:
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#
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# config.wrappers do |b|
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# # Use a single component
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# b.use :html5
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#
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# # Use the component, but do not automatically lookup. It will only be triggered when
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# # :placeholder is explicitly set.
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# b.optional :placeholder
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#
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# # Use a component with specific wrapper options
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# b.use :error, wrap_with: { tag: "span", class: "error" }
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#
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# # Use a set of components by wrapping them in a tag+class.
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# b.wrapper tag: "div", class: "another" do |ba|
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# ba.use :label
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# ba.use :input
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# end
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#
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# # Use a set of components by wrapping them in a tag+class.
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# # This wrapper is identified by :label_input, which means it can
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# # be turned off on demand with `f.input :name, label_input: false`
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# b.wrapper :label_input, tag: "div", class: "another" do |ba|
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# ba.use :label
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# ba.use :input
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# end
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# end
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#
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# The builder also accepts default options at the root level. This is usually
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# used if you want a component to be disabled by default:
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#
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# config.wrappers hint: false do |b|
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# b.use :hint
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# b.use :label_input
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# end
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#
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# In the example above, hint defaults to false, which means it won't automatically
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# do the lookup anymore. It will only be triggered when :hint is explicitly set.
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class Builder
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def initialize(options)
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@options = options
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@components = []
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end
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def use(name, options = {})
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if options && wrapper = options[:wrap_with]
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@components << Single.new(name, wrapper, options.except(:wrap_with))
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else
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@components << Leaf.new(name, options)
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end
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end
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def optional(name, options = {}, &block)
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@options[name] = false
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use(name, options)
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end
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def wrapper(name, options = nil)
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if block_given?
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name, options = nil, name if name.is_a?(Hash)
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builder = self.class.new(@options)
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options ||= {}
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options[:tag] = :div if options[:tag].nil?
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yield builder
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@components << Many.new(name, builder.to_a, options)
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else
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raise ArgumentError, "A block is required as argument to wrapper"
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end
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end
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def to_a
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@components
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end
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end
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end
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end
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