1 files changed, 19 insertions, 0 deletions
diff --git a/components/script/dom/globalscope.rs b/components/script/dom/globalscope.rs
index 7bd0e28be6a..385939000bc 100644
--- a/components/script/dom/globalscope.rs
+++ b/components/script/dom/globalscope.rs
@@ -58,6 +58,7 @@ use profile_traits::{mem as profile_mem, time as profile_time};
 use script_traits::{MsDuration, ScriptToConstellationChan, TimerEvent};
 use script_traits::{TimerEventId, TimerSchedulerMsg, TimerSource};
 use servo_url::{MutableOrigin, ServoUrl};
+use std::borrow::Cow;
 use std::cell::Cell;
 use std::collections::hash_map::Entry;
 use std::collections::HashMap;
@@ -157,6 +158,12 @@ pub struct GlobalScope {
     /// <https://html.spec.whatwg.org/multipage/#outstanding-rejected-promises-weak-set>
     #[ignore_malloc_size_of = "mozjs"]
     consumed_rejections: DomRefCell<Vec<Box<Heap<*mut JSObject>>>>,
+
+    /// True if headless mode.
+    is_headless: bool,
+
+    /// An optional string allowing the user agent to be set for testing.
+    user_agent: Cow<'static, str>,
 }
 
 impl GlobalScope {
@@ -171,6 +178,8 @@ impl GlobalScope {
         timer_event_chan: IpcSender<TimerEvent>,
         origin: MutableOrigin,
         microtask_queue: Rc<MicrotaskQueue>,
+        is_headless: bool,
+        user_agent: Cow<'static, str>,
     ) -> Self {
         Self {
             eventtarget: EventTarget::new_inherited(),
@@ -193,6 +202,8 @@ impl GlobalScope {
             event_source_tracker: DOMTracker::new(),
             uncaught_rejections: Default::default(),
             consumed_rejections: Default::default(),
+            is_headless,
+            user_agent,
         }
     }
 
@@ -799,6 +810,14 @@ impl GlobalScope {
         }
         unreachable!();
     }
+
+    pub fn is_headless(&self) -> bool {
+        self.is_headless
+    }
+
+    pub fn get_user_agent(&self) -> Cow<'static, str> {
+        self.user_agent.clone()
+    }
 }
 
 fn timestamp_in_ms(time: Timespec) -> u64 {