Backed out 3 changesets (bug 1606503) for causing bustages in nsXPLookAndFeel.cpp CLOSED TREE

Backed out changeset 7e9d421335e0 (bug 1606503)
Backed out changeset 371f74475fb9 (bug 1606503)
Backed out changeset 8aada655d8bc (bug 1606503)

layout/style/test/test_mq_prefers_reduced_motion_dynamic.html

@@ -37,16 +37,10 @@ async function promiseForChange(mediaQuery) {
 }
 
 add_task(async () => {
-  const initiallyMatches =
-      window.matchMedia('(prefers-reduced-motion: reduce)').matches;
-
   SpecialPowers.DOMWindowUtils.setPrefersReducedMotionOverrideForTest(false);
 
-  if (initiallyMatches) {
+  // Need to wait a frame since MediaQuery changes are asynchronously processed.
-    await promiseForChange('(prefers-reduced-motion: reduce)');
-  } else {
   await waitForFrame();
-  }
 
   ok(!window.matchMedia('(prefers-reduced-motion: reduce)').matches,
      'Does not matches prefers-reduced-motion: reduced) when the system sets ' +

widget/LookAndFeel.h

@@ -534,10 +534,6 @@ class LookAndFeel {
    * or not.
    */
   static void SetShouldRetainCacheForTest(bool aValue);
-
-  static void SetPrefersReducedMotionOverrideForTest(bool aValue);
-
-  static void ResetPrefersReducedMotionOverrideForTest();
 };
 
 }  // namespace mozilla

widget/PuppetWidget.cpp

@@ -1445,6 +1445,9 @@ nsresult PuppetWidget::SetPrefersReducedMotionOverrideForTest(bool aValue) {
     return NS_ERROR_FAILURE;
   }
 
+  nsXPLookAndFeel::GetInstance()->SetPrefersReducedMotionOverrideForTest(
+      aValue);
+
   mBrowserChild->SendSetPrefersReducedMotionOverrideForTest(aValue);
   return NS_OK;
 }
@@ -1454,6 +1457,7 @@ nsresult PuppetWidget::ResetPrefersReducedMotionOverrideForTest() {
     return NS_ERROR_FAILURE;
   }
 
+  nsXPLookAndFeel::GetInstance()->ResetPrefersReducedMotionOverrideForTest();
   mBrowserChild->SendResetPrefersReducedMotionOverrideForTest();
   return NS_OK;
 }

widget/android/nsLookAndFeel.cpp

@@ -76,18 +76,10 @@ void nsLookAndFeel::NativeInit() {
 
 /* virtual */
 void nsLookAndFeel::RefreshImpl() {
-  if (mShouldRetainCacheForTest) {
-    return;
-  }
-
   nsXPLookAndFeel::RefreshImpl();
 
   mInitializedSystemColors = false;
   mInitializedShowPassword = false;
-
-  if (XRE_IsParentProcess()) {
-    mPrefersReducedMotionCached = false;
-  }
 }
 
 nsresult nsLookAndFeel::NativeGetColor(ColorID aID, nscolor& aColor) {
@@ -420,11 +412,11 @@ nsresult nsLookAndFeel::GetIntImpl(IntID aID, int32_t& aResult) {
       break;
 
     case eIntID_PrefersReducedMotion:
-      if (!mPrefersReducedMotionCached && XRE_IsParentProcess()) {
+      if (sIsInPrefersReducedMotionForTest) {
-        mPrefersReducedMotion =
+        aResult = sPrefersReducedMotionForTest ? 1 : 0;
-            java::GeckoSystemStateListener::PrefersReducedMotion() ? 1 : 0;
+        break;
       }
-      aResult = mPrefersReducedMotion;
+      aResult = java::GeckoSystemStateListener::PrefersReducedMotion() ? 1 : 0;
       break;
 
     case eIntID_PrimaryPointerCapabilities:
@@ -521,28 +513,3 @@ void nsLookAndFeel::EnsureInitShowPassword() {
   }
 }
 
-nsTArray<LookAndFeelInt> nsLookAndFeel::GetIntCacheImpl() {
-  nsTArray<LookAndFeelInt> lookAndFeelIntCache =
-      nsXPLookAndFeel::GetIntCacheImpl();
-
-  const IntID kIdsToCache[] = {eIntID_PrefersReducedMotion};
-
-  for (IntID id : kIdsToCache) {
-    lookAndFeelIntCache.AppendElement(
-        LookAndFeelInt{id, {.value = GetInt(id)}});
-  }
-
-  return lookAndFeelIntCache;
-}
-
-void nsLookAndFeel::SetIntCacheImpl(
-    const nsTArray<LookAndFeelInt>& aLookAndFeelIntCache) {
-  for (const auto& entry : aLookAndFeelIntCache) {
-    switch (entry.id) {
-      case eIntID_PrefersReducedMotion:
-        mPrefersReducedMotion = entry.value;
-        mPrefersReducedMotionCached = true;
-        break;
-    }
-  }
-}

widget/android/nsLookAndFeel.h

@@ -23,9 +23,6 @@ class nsLookAndFeel final : public nsXPLookAndFeel {
   virtual bool GetEchoPasswordImpl() override;
   virtual uint32_t GetPasswordMaskDelayImpl() override;
   virtual char16_t GetPasswordCharacterImpl() override;
-  virtual nsTArray<LookAndFeelInt> GetIntCacheImpl() override;
-  virtual void SetIntCacheImpl(
-      const nsTArray<LookAndFeelInt>& aLookAndFeelIntCache) override;
 
  protected:
   static bool mInitializedSystemColors;

widget/android/nsWindow.cpp

@@ -2336,15 +2336,15 @@ void nsWindow::UpdateDynamicToolbarOffset(ScreenIntCoord aOffset) {
 }
 
 nsresult nsWindow::SetPrefersReducedMotionOverrideForTest(bool aValue) {
-  LookAndFeel::SetPrefersReducedMotionOverrideForTest(aValue);
+  nsXPLookAndFeel::GetInstance()->SetPrefersReducedMotionOverrideForTest(
+      aValue);
 
-  // Notify as if the corresponding setting changed.
   java::GeckoSystemStateListener::NotifyPrefersReducedMotionChangedForTest();
   return NS_OK;
 }
 
 nsresult nsWindow::ResetPrefersReducedMotionOverrideForTest() {
-  LookAndFeel::ResetPrefersReducedMotionOverrideForTest();
+  nsXPLookAndFeel::GetInstance()->ResetPrefersReducedMotionOverrideForTest();
   return NS_OK;
 }
 

widget/cocoa/nsChildView.mm

@@ -2190,7 +2190,24 @@ void nsChildView::LookUpDictionary(const nsAString& aText,
 }
 
 nsresult nsChildView::SetPrefersReducedMotionOverrideForTest(bool aValue) {
-  LookAndFeel::SetPrefersReducedMotionOverrideForTest(aValue);
+  // Tell that the cache value we are going to set isn't cleared via
+  // nsPresContext::ThemeChangedInternal which is called right before
+  // we queue the media feature value change for this prefers-reduced-motion
+  // change.
+  LookAndFeel::SetShouldRetainCacheForTest(true);
+
+  LookAndFeelInt prefersReducedMotion;
+  prefersReducedMotion.id = LookAndFeel::eIntID_PrefersReducedMotion;
+  prefersReducedMotion.value = aValue ? 1 : 0;
+
+  AutoTArray<LookAndFeelInt, 1> lookAndFeelCache;
+  lookAndFeelCache.AppendElement(prefersReducedMotion);
+
+  // If we could have a way to modify
+  // NSWorkspace.accessibilityDisplayShouldReduceMotion, we could use it, but
+  // unfortunately there is no way, so we change the cache value instead as if
+  // it's set in the parent process.
+  LookAndFeel::SetIntCache(lookAndFeelCache);
 
   if (nsCocoaFeatures::OnMojaveOrLater() &&
       NSWorkspaceAccessibilityDisplayOptionsDidChangeNotification) {
@@ -2210,7 +2227,7 @@ nsresult nsChildView::SetPrefersReducedMotionOverrideForTest(bool aValue) {
 }
 
 nsresult nsChildView::ResetPrefersReducedMotionOverrideForTest() {
-  LookAndFeel::ResetPrefersReducedMotionOverrideForTest();
+  LookAndFeel::SetShouldRetainCacheForTest(false);
   return NS_OK;
 }
 

widget/cocoa/nsLookAndFeel.h

@@ -45,6 +45,9 @@ class nsLookAndFeel final : public nsXPLookAndFeel {
   int32_t mAllowOverlayScrollbarsOverlap;
   bool mAllowOverlayScrollbarsOverlapCached;
 
+  int32_t mPrefersReducedMotion;
+  bool mPrefersReducedMotionCached;
+
   int32_t mSystemUsesDarkTheme;
   bool mSystemUsesDarkThemeCached;
 

widget/cocoa/nsLookAndFeel.mm

@@ -40,6 +40,8 @@ nsLookAndFeel::nsLookAndFeel()
       mUseOverlayScrollbarsCached(false),
       mAllowOverlayScrollbarsOverlap(-1),
       mAllowOverlayScrollbarsOverlapCached(false),
+      mPrefersReducedMotion(-1),
+      mPrefersReducedMotionCached(false),
       mSystemUsesDarkTheme(-1),
       mSystemUsesDarkThemeCached(false),
       mColorTextSelectBackground(0),

widget/gtk/nsLookAndFeel.h

@@ -92,6 +92,7 @@ class nsLookAndFeel final : public nsXPLookAndFeel {
   char16_t mInvisibleCharacter = 0;
   float mCaretRatio = 0.0f;
   int32_t mCaretBlinkTime = 0;
+  int32_t mPrefersReducedMotion = -1;
   bool mMenuSupportsDrag = false;
   bool mCSDAvailable = false;
   bool mCSDHideTitlebarByDefault = false;
@@ -102,6 +103,7 @@ class nsLookAndFeel final : public nsXPLookAndFeel {
   bool mSystemUsesDarkTheme = false;
   bool mHighContrast = false;
   bool mInitialized = false;
+  bool mPrefersReducedMotionCached = false;
 
   void EnsureInit();
   void ConfigureContentGtkTheme();

widget/gtk/nsWindow.cpp

@@ -7722,7 +7722,16 @@ void nsWindow::LockAspectRatio(bool aShouldLock) {
 }
 
 nsresult nsWindow::SetPrefersReducedMotionOverrideForTest(bool aValue) {
-  LookAndFeel::SetPrefersReducedMotionOverrideForTest(aValue);
+  LookAndFeel::SetShouldRetainCacheForTest(true);
+
+  LookAndFeelInt prefersReducedMotion;
+  prefersReducedMotion.id = LookAndFeel::eIntID_PrefersReducedMotion;
+  prefersReducedMotion.value = aValue ? 1 : 0;
+
+  AutoTArray<LookAndFeelInt, 1> lookAndFeelCache;
+  lookAndFeelCache.AppendElement(prefersReducedMotion);
+
+  LookAndFeel::SetIntCache(lookAndFeelCache);
 
   // Notify as if the corresponding setting changed.
   g_object_notify(G_OBJECT(gtk_settings_get_default()),
@@ -7732,7 +7741,7 @@ nsresult nsWindow::SetPrefersReducedMotionOverrideForTest(bool aValue) {
 }
 
 nsresult nsWindow::ResetPrefersReducedMotionOverrideForTest() {
-  LookAndFeel::ResetPrefersReducedMotionOverrideForTest();
+  LookAndFeel::SetShouldRetainCacheForTest(false);
 
   return NS_OK;
 }

widget/nsXPLookAndFeel.cpp

@@ -226,6 +226,8 @@ int32_t nsXPLookAndFeel::sCachedColors[size_t(LookAndFeel::ColorID::End)] = {0};
 int32_t nsXPLookAndFeel::sCachedColorBits[COLOR_CACHE_SIZE] = {0};
 
 bool nsXPLookAndFeel::sInitialized = false;
+bool nsXPLookAndFeel::sIsInPrefersReducedMotionForTest = false;
+bool nsXPLookAndFeel::sPrefersReducedMotionForTest = false;
 
 nsXPLookAndFeel* nsXPLookAndFeel::sInstance = nullptr;
 bool nsXPLookAndFeel::sShutdown = false;
@@ -256,6 +258,9 @@ void nsXPLookAndFeel::Shutdown() {
   sInstance = nullptr;
 }
 
+nsXPLookAndFeel::nsXPLookAndFeel()
+    : LookAndFeel(), mShouldRetainCacheForTest(false) {}
+
 // static
 void nsXPLookAndFeel::IntPrefChanged(nsLookAndFeelIntPref* data) {
   if (!data) {
@@ -1088,26 +1093,4 @@ void LookAndFeel::SetShouldRetainCacheForTest(bool aValue) {
   nsLookAndFeel::GetInstance()->SetShouldRetainCacheImplForTest(aValue);
 }
 
-// static
-void LookAndFeel::SetPrefersReducedMotionOverrideForTest(bool aValue) {
-  // Tell that the cache value we are going to set isn't cleared via
-  // nsPresContext::ThemeChangedInternal which is called right before
-  // we queue the media feature value change for this prefers-reduced-motion
-  // change.
-  SetShouldRetainCacheForTest(true);
-
-  int32_t value = aValue ? 1 : 0;
-
-  AutoTArray<LookAndFeelInt, 1> lookAndFeelCache;
-  lookAndFeelCache.AppendElement(
-      LookAndFeelInt{eIntID_PrefersReducedMotion, .value = value});
-
-  SetIntCache(lookAndFeelCache);
-}
-
-// static
-void LookAndFeel::ResetPrefersReducedMotionOverrideForTest() {
-  SetShouldRetainCacheForTest(false);
-}
-
 }  // namespace mozilla

widget/nsXPLookAndFeel.h

@@ -81,8 +81,17 @@ class nsXPLookAndFeel : public mozilla::LookAndFeel {
 
   virtual void NativeInit() = 0;
 
+  void SetPrefersReducedMotionOverrideForTest(bool aValue) {
+    sIsInPrefersReducedMotionForTest = true;
+    sPrefersReducedMotionForTest = aValue;
+  }
+  void ResetPrefersReducedMotionOverrideForTest() {
+    sIsInPrefersReducedMotionForTest = false;
+    sPrefersReducedMotionForTest = false;
+  }
+
  protected:
-  nsXPLookAndFeel() = default;
+  nsXPLookAndFeel();
 
   static void IntPrefChanged(nsLookAndFeelIntPref* data);
   static void FloatPrefChanged(nsLookAndFeelFloatPref* data);
@@ -112,11 +121,12 @@ class nsXPLookAndFeel : public mozilla::LookAndFeel {
   static nsXPLookAndFeel* sInstance;
   static bool sShutdown;
 
-  int32_t mPrefersReducedMotion = -1;
+  static bool sIsInPrefersReducedMotionForTest;
-  bool mPrefersReducedMotionCached = false;
+  static bool sPrefersReducedMotionForTest;
+
   // True if we shouldn't clear the cache value in RefreshImpl().
   // NOTE: This should be used only for testing.
-  bool mShouldRetainCacheForTest = false;
+  bool mShouldRetainCacheForTest;
 };
 
 #endif