From a5ac55c8ff0c572fc1dcdb9b420720828d0c18d4 Mon Sep 17 00:00:00 2001
From: Boris Zbarsky <bzbarsky@mit.edu>
Date: Wed, 4 Jan 2017 13:40:19 -0500
Subject: [PATCH] Bug 1298588 part 4, servo piece.  Recreate the default
 computed values for a document as needed.  r=bholley

---
 components/style/gecko_bindings/bindings.rs | 6 ++++++
 ports/geckolib/glue.rs                      | 8 ++++++++
 2 files changed, 14 insertions(+)

diff --git a/components/style/gecko_bindings/bindings.rs b/components/style/gecko_bindings/bindings.rs
index 0f7da774c8e..83350c3d389 100644
--- a/components/style/gecko_bindings/bindings.rs
+++ b/components/style/gecko_bindings/bindings.rs
@@ -1160,6 +1160,12 @@ extern "C" {
     pub fn Servo_StyleSet_Init(pres_context: RawGeckoPresContextBorrowed)
      -> RawServoStyleSetOwned;
 }
+extern "C" {
+    pub fn Servo_StyleSet_RecomputeDefaultStyles(set:
+                                                     RawServoStyleSetBorrowed,
+                                                 pres_context:
+                                                     RawGeckoPresContextBorrowed);
+}
 extern "C" {
     pub fn Servo_StyleSet_AppendStyleSheet(set: RawServoStyleSetBorrowed,
                                            sheet: RawServoStyleSheetBorrowed,
diff --git a/ports/geckolib/glue.rs b/ports/geckolib/glue.rs
index c5c0733a5c5..9758c696797 100644
--- a/ports/geckolib/glue.rs
+++ b/ports/geckolib/glue.rs
@@ -608,6 +608,14 @@ pub extern "C" fn Servo_StyleSet_Init(pres_context: RawGeckoPresContextBorrowed)
     data.into_ffi()
 }
 
+#[no_mangle]
+pub extern "C" fn Servo_StyleSet_RecomputeDefaultStyles(
+  raw_data: RawServoStyleSetBorrowed,
+  pres_context: RawGeckoPresContextBorrowed) {
+    let mut data = PerDocumentStyleData::from_ffi(raw_data).borrow_mut();
+    data.default_computed_values = ComputedValues::default_values(pres_context);
+}
+
 #[no_mangle]
 pub extern "C" fn Servo_StyleSet_Drop(data: RawServoStyleSetOwned) -> () {
     let _ = data.into_box::<PerDocumentStyleData>();