Class: Puppeteer::CSSCoverage
- Inherits:
-
Object
- Object
- Puppeteer::CSSCoverage
- Includes:
- Puppeteer::Coverage::UtilFunctions
- Defined in:
- lib/puppeteer/css_coverage.rb
Defined Under Namespace
Classes: Item
Instance Method Summary collapse
-
#initialize(client) ⇒ CSSCoverage
constructor
A new instance of CSSCoverage.
- #start(reset_on_navigation: nil) ⇒ Object
- #stop ⇒ Object
Constructor Details
#initialize(client) ⇒ CSSCoverage
Returns a new instance of CSSCoverage.
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# File 'lib/puppeteer/css_coverage.rb', line 16 def initialize(client) @client = client @enabled = false @stylesheet_urls = {} @stylesheet_sources = {} end |
Instance Method Details
#start(reset_on_navigation: nil) ⇒ Object
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# File 'lib/puppeteer/css_coverage.rb', line 23 def start(reset_on_navigation: nil) raise 'CSSCoverage is already enabled' if @enabled @reset_on_navigation = if [true, false].include?() else true end @enabled = true @stylesheet_urls.clear @stylesheet_sources.clear @event_listeners = [] @event_listeners << @client.add_event_listener('CSS.styleSheetAdded') do |event| future { on_stylesheet(event) } end @event_listeners << @client.add_event_listener('Runtime.executionContextsCleared') do on_execution_contexts_cleared end await_all( @client.('DOM.enable'), @client.('CSS.enable'), @client.('CSS.startRuleUsageTracking'), ) end |
#stop ⇒ Object
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# File 'lib/puppeteer/css_coverage.rb', line 74 def stop raise 'CSSCoverage is not enabled' unless @enabled @enabled = false rule_tracking_response = @client.('CSS.stopRuleUsageTracking') await_all( @client.('CSS.disable'), @client.('DOM.disable'), ) @client.remove_event_listener(*@event_listeners) # aggregate by styleSheetId stylesheet_id_to_coverage = {} rule_tracking_response['ruleUsage'].each do |entry| ranges = stylesheet_id_to_coverage[entry['styleSheetId']] unless ranges ranges = [] stylesheet_id_to_coverage[entry['styleSheetId']] = ranges end ranges << { 'startOffset' => entry['startOffset'], 'endOffset' => entry['endOffset'], 'count' => entry['used'] ? 1 : 0, } end coverage = [] @stylesheet_urls.each do |stylesheet_id, url| text = @stylesheet_sources[stylesheet_id] ranges = convert_to_disjoint_ranges(stylesheet_id_to_coverage[stylesheet_id] || []) coverage << Item.new(url: url, ranges: ranges, text: text) end coverage end |