66 lines
2.3 KiB
Ruby
66 lines
2.3 KiB
Ruby
# frozen_string_literal: true
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# name: discourse-internet-explorer
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# about: Attempts to provide backward support for internt explorer
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# version: 1.0
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# authors: Joffrey Jaffeux, David Taylor, Daniel Waterworth, Robin Ward
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# url: https://github.com/discourse/discourse/tree/master/plugins/discourse-internet-explorer
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enabled_site_setting :discourse_internet_explorer_enabled
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hide_plugin if self.respond_to?(:hide_plugin)
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register_asset 'stylesheets/ie.scss'
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# We can't use register asset for an optional resource. Instead copy it after plugins have
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# been activated so it can be uploaded to CDNs.
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DiscourseEvent.on(:after_plugin_activation) do ||
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polyfill_path = "#{Plugin::Instance.js_path}/#{self.directory_name}-optional.js"
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FileUtils.cp("#{Rails.root}/public/plugins/discourse-internet-explorer/js/ie.js", polyfill_path)
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Rails.configuration.assets.precompile << "plugins/discourse-internet-explorer-optional.js"
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end
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after_initialize do
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# Conditionally load the stylesheet. There is unfortunately no easy way to do this via
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# Plugin API.
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reloadable_patch do |plugin|
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ApplicationHelper.module_eval do
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alias_method :previous_discourse_stylesheet_link_tag, :discourse_stylesheet_link_tag
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def discourse_stylesheet_link_tag(name, opts = {})
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if name == 'discourse-internet-explorer'
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return unless SiteSetting.discourse_internet_explorer_enabled?
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return unless request.env['HTTP_USER_AGENT'] =~ /MSIE|Trident/
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end
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previous_discourse_stylesheet_link_tag(name, opts)
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end
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end
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end
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register_anonymous_cache_key(:ie) do
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unless defined?(@is_ie)
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session = @env[self.class::RACK_SESSION]
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# don't initialize params until later
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# otherwise you get a broken params on the request
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params = {}
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@is_ie = BrowserDetection.browser(@env[self.class::USER_AGENT]) == :ie
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end
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@is_ie
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end
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# not using patch on preload_script as js is fine and we need this file
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# to be loaded before other files
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register_html_builder('server:before-script-load') do |controller|
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if BrowserDetection.browser(controller.request.env['HTTP_USER_AGENT']) == :ie
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path = controller.helpers.script_asset_path('plugins/discourse-internet-explorer-optional')
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<<~JAVASCRIPT
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<script src="#{path}"></script>
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JAVASCRIPT
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end
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end
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end
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