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* `with_slot` is now `renders_one` * `with_slot collection: true` is now `renders_many` * Slots are no longer stand-alone classes, but are lambdas that return an object that responds to `render_in` or a string * Add support for positional arguments in slots v2 * Abstract away `slot.content`, preferring `to_s` (implicit or explicit) * Replace `#slot` API with an API using the slots name. e.g. `c.slot(:header, 1)` is now `c.header(1)`
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,60 @@ | ||
| # frozen_string_literal: true | ||
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| module ViewComponent | ||
| class SubComponentWrapper | ||
| attr_writer :_component_instance, :_content_block, :_content | ||
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| # Parent must be `nil` for v1 | ||
| def initialize(parent = nil) | ||
| @parent = parent | ||
| end | ||
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| # Used to render the subcomponent content in the template | ||
| # | ||
| # There's currently 3 different values that may be set, that we can render. | ||
| # | ||
| # If the subcomponent renderable is a component, the string class name of a | ||
| # component, or a function that returns a component, we render that | ||
| # component instance, returning the string. | ||
| # | ||
| # If the subcomponent renderable is a function and returns a string, it is | ||
| # set as `@_content` and is returned directly. | ||
| # | ||
| # If there is no subcomponent renderable, we evaluate the block passed to | ||
| # the subcomponent and return it (content area style) | ||
| def to_s | ||
| if defined?(@_component_instance) | ||
| # render_in is faster than `parent.render` | ||
| @_component_instance.render_in( | ||
| @parent.send(:view_context), | ||
| &@_content_block | ||
| ) | ||
| elsif defined?(@_content) | ||
| @_content | ||
| elsif defined?(@_content_block) | ||
| @_content_block.call | ||
| end | ||
| end | ||
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| # This allows access to public component methods via the wrapper | ||
| # | ||
| # e.g. | ||
| # | ||
| # calling `header.name` (where `header` is a subcomponent) will call `name` | ||
| # on the `HeaderComponent` instance | ||
| # | ||
| # Where the component may includes: | ||
| # | ||
| # has_one :header, HeaderComponent | ||
| # | ||
| # class HeaderComponent < ViewComponent::Base | ||
| # def name | ||
| # @name | ||
| # end | ||
| # end | ||
| # | ||
| def method_missing(symbol, *args, &block) | ||
| @_component_instance.public_send(symbol, *args, &block) | ||
| end | ||
| end | ||
| end |
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