Commit 9a15523f authored by Fatih's avatar Fatih Committed by morgan
Browse files

Bug 1834307: Check RFPTarget::CSSPrefersReducedMotion in... 

Bug 1834307: Check RFPTarget::CSSPrefersReducedMotion in nsLayoutUtils::IsSmoothScrollingEnabled. r=tjr

Differential Revision: https://phabricator.services.mozilla.com/D221364
parent a6a8e4e6

layout/base/nsLayoutUtils.cpp

+12 −17
Original line number Diff line number Diff line
@@ -7765,16 +7765,6 @@ size_t nsLayoutUtils::SizeOfTextRunsForFrames(nsIFrame* aFrame, 


/* static */

void nsLayoutUtils::RecomputeSmoothScrollDefault() {

  if (nsContentUtils::ShouldResistFingerprinting(

          "We use the global RFP pref to maintain consistent scroll behavior "

          "in the browser.",

          RFPTarget::CSSPrefersReducedMotion)) {

    // When resist fingerprinting is enabled, we should not default disable

    // smooth scrolls when the user prefers-reduced-motion to avoid leaking

    // the value of the OS pref to sites.

    Preferences::SetBool(StaticPrefs::GetPrefName_general_smoothScroll(), true,

                         PrefValueKind::Default);

  } else {

  // We want prefers-reduced-motion to determine the default

  // value of the general.smoothScroll pref. If the user

  // changed the pref we want to respect the change.
@@ -7783,10 +7773,15 @@ void nsLayoutUtils::RecomputeSmoothScrollDefault() { 
      !LookAndFeel::GetInt(LookAndFeel::IntID::PrefersReducedMotion, 0),

      PrefValueKind::Default);

}

}



/* static */

bool nsLayoutUtils::IsSmoothScrollingEnabled() {

  if (nsContentUtils::ShouldResistFingerprinting(

          "We use the global RFP pref to maintain consistent scroll behavior "

          "in the browser.",

          RFPTarget::CSSPrefersReducedMotion)) {

    return true;

  }

  return StaticPrefs::general_smoothScroll();

}