2022-02-23 23:36:28 +00:00
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CONTENT_FOR_BLOCKS = Hash(String, Tuple(String, Proc(Nil))).new
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2016-07-09 16:54:35 +00:00
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2017-03-03 20:42:08 +00:00
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# `content_for` is a set of helpers that allows you to capture
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2016-07-10 10:00:13 +00:00
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# blocks inside views to be rendered later during the request. The most
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# common use is to populate different parts of your layout from your view.
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#
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# The currently supported engines are: ecr and slang.
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#
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2017-03-03 20:42:08 +00:00
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# ## Usage
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2016-07-10 10:00:13 +00:00
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#
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2017-03-03 20:42:08 +00:00
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# You call `content_for`, generally from a view, to capture a block of markup
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2016-07-10 10:00:13 +00:00
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# giving it an identifier:
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#
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2017-10-06 11:53:53 +00:00
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# ```
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# # index.ecr
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# <% content_for "some_key" do %>
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# <chunk of="html">...</chunk>
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# <% end %>
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# ```
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2016-07-10 10:00:13 +00:00
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#
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2017-03-03 20:42:08 +00:00
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# Then, you call `yield_content` with that identifier, generally from a
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2016-07-10 10:00:13 +00:00
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# layout, to render the captured block:
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#
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2017-10-06 11:53:53 +00:00
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# ```
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# # layout.ecr
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# <%= yield_content "some_key" %>
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# ```
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2016-07-10 10:00:13 +00:00
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#
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2017-03-03 20:42:08 +00:00
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# ## And How Is This Useful?
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2016-07-10 10:00:13 +00:00
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#
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# For example, some of your views might need a few javascript tags and
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# stylesheets, but you don't want to force this files in all your pages.
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2017-03-03 20:42:08 +00:00
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# Then you can put `<%= yield_content :scripts_and_styles %>` on your
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# layout, inside the <head> tag, and each view can call `content_for`
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2016-07-10 10:00:13 +00:00
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# setting the appropriate set of tags that should be added to the layout.
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2016-07-10 12:01:00 +00:00
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macro content_for(key, file = __FILE__)
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2022-02-23 23:36:28 +00:00
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CONTENT_FOR_BLOCKS[{{key}}] = Tuple.new {{file}}, ->() { {{ yield }} }
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2016-07-09 16:54:35 +00:00
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nil
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2016-07-09 15:57:35 +00:00
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end
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2017-03-03 20:42:08 +00:00
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# Yields content for the given key if a `content_for` block exists for that key.
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2016-07-09 16:54:35 +00:00
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macro yield_content(key)
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2016-07-10 12:01:00 +00:00
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if CONTENT_FOR_BLOCKS.has_key?({{key}})
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__caller_filename__ = CONTENT_FOR_BLOCKS[{{key}}][0]
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2016-07-13 13:24:25 +00:00
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%proc = CONTENT_FOR_BLOCKS[{{key}}][1]
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2022-06-27 09:28:13 +00:00
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if __content_filename__ == __caller_filename__
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%old_content_io, content_io = content_io, IO::Memory.new
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%proc.call
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%result = content_io.to_s
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content_io = %old_content_io
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%result
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end
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2016-07-10 12:01:00 +00:00
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end
|
2016-07-09 15:57:35 +00:00
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end
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2016-07-17 14:06:49 +00:00
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# Render view with a layout as the superview.
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#
|
2017-10-06 11:53:53 +00:00
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# ```
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# render "src/views/index.ecr", "src/views/layout.ecr"
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# ```
|
2015-12-14 18:05:46 +00:00
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macro render(filename, layout)
|
2016-07-10 12:01:00 +00:00
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__content_filename__ = {{filename}}
|
2022-02-23 23:36:28 +00:00
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content_io = IO::Memory.new
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ECR.embed {{filename}}, content_io
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content = content_io.to_s
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layout_io = IO::Memory.new
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ECR.embed {{layout}}, layout_io
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layout_io.to_s
|
2015-12-14 18:05:46 +00:00
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end
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|
2016-07-17 14:06:49 +00:00
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|
# Render view with the given filename.
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|
|
macro render(filename)
|
2021-09-08 13:21:25 +00:00
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|
|
ECR.render({{filename}})
|
2016-02-15 17:09:33 +00:00
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|
end
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|
2016-07-17 14:06:49 +00:00
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|
# Halt execution with the current context.
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|
# Returns 200 and an empty response by default.
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#
|
2017-10-06 11:53:53 +00:00
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|
|
# ```
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|
# halt env, status_code: 403, response: "Forbidden"
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|
# ```
|
2016-11-01 08:46:13 +00:00
|
|
|
macro halt(env, status_code = 200, response = "")
|
2016-03-29 21:48:58 +00:00
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|
|
{{env}}.response.status_code = {{status_code}}
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|
|
{{env}}.response.print {{response}}
|
2016-11-07 19:31:36 +00:00
|
|
|
{{env}}.response.close
|
2016-03-29 21:48:58 +00:00
|
|
|
next
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|
end
|
2017-04-06 18:43:41 +00:00
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|
# Extends context storage with user defined types.
|
|
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|
|
#
|
2017-10-06 11:53:53 +00:00
|
|
|
# ```
|
2017-04-06 18:43:41 +00:00
|
|
|
# class User
|
|
|
|
|
# property name
|
|
|
|
|
# end
|
|
|
|
|
#
|
|
|
|
|
# add_context_storage_type(User)
|
2017-10-06 11:53:53 +00:00
|
|
|
# ```
|
2017-04-06 18:43:41 +00:00
|
|
|
macro add_context_storage_type(type)
|
|
|
|
|
{{ HTTP::Server::Context::STORE_MAPPINGS.push(type) }}
|
|
|
|
|
end
|
