lib/ballast/concerns/view.rb
#
# This file is part of the ballast gem. Copyright (C) 2013 and above Shogun <shogun@cowtech.it>.
# Licensed under the MIT license, which can be found at https://choosealicense.com/licenses/mit.
#
module Ballast
module Concerns
# A concern to help view handling.
module View
# Scopes the CSS of the current page using the controller and action name.
#
# @return [String] The scoped string.
def scope_css
format("%s %s", controller_path.gsub("/", "-"), action_name)
end
# Returns an instance of the browser.
#
# @return [Browser] A browser object.
def browser
@browser ||= Brauser::Browser.new(request.user_agent, request.headers["Accept-Language"])
end
# Checks if the current browser is supported according to a definition YAML file.
#
# @param file [String] The configuration file which holds the definitions.
# @param root [String|NilClass] The directory that contains the configuration file.
# @return [Boolean] `true` if the browser is supported, `false` otherwise.
def browser_supported?(file = "config/supported-browsers.yml", root: nil)
browser.supported?(((Ballast::Configuration.default_root || root) + "/" + file).to_s)
end
# Returns one or all layout parameters.
#
# @param key [String|Symbol|NilClass] The parameter to return. If set to `nil`, all the parameters will be returned as an hash.
# @param default_value [Object|NilClass] The default value if the parameter is not present.
# @return [Object|Hash|NilClass] The parameter or the entire layout parameters hash.
def layout_params(key = nil, default_value = nil)
initialize_view_params
key ? @layout_params.fetch(key, default_value) : @layout_params
end
alias_method :layout_param, :layout_params
# Adds/Replaces layout parameters.
#
# @param args [Hash] The parameters to add or replace.
def update_layout_params(**args)
initialize_view_params
@layout_params.merge!(args)
end
# Outputs the Javascript parameters.
#
# @param id [String|NilClass|FalseClass] The id for the tag. If `nil` or `false`, the parameters will be returned as an hash.
# @param tag [Symbol] The tag to use for HTML.
# @param attribute [Symbol] The attribute to use for the HTML element id.
# @return [String|Hash] Javascript parameters as HTML or as an hash.
def javascript_params(id = nil, tag: :details, attribute: "data-jid")
initialize_view_params
id ? content_tag(tag, @javascript_params.to_json.html_safe, attribute => id) : @javascript_params
end
# Adds/Replaces Javascript parameters.
#
# @param key [String|Symbol] The key of the new parameters. If `nil`, the root will be merged/replaced.
# @param data [Hash] The data to add or replace.
# @param replace [Boolean] Whether to replace existing data rather than merge.
def update_javascript_params(key, data, replace: false)
initialize_view_params
if key
@javascript_params[key] = nil if replace
@javascript_params[key] ||= {}
@javascript_params[key].merge!(data)
elsif replace
@javascript_params = data.with_indifferent_access
else
@javascript_params.merge!(data)
end
end
private
# :nodoc:
def initialize_view_params
@layout_params ||= HashWithIndifferentAccess.new
@javascript_params ||= HashWithIndifferentAccess.new
end
end
end
end