Bug 1523692 - Set the prefers-reduce-motion value for test to the instance of nsLookAndFeel in child processes. r=snorp

So that we can query the test value in the child process properly.

Note that the APIs used for setting the prefers-reduced-motion value for testing
are only used on Android and MacOSX.  As for MacOSX we have a different
machinery (see bug 1486971) to deliver the test value without spinning native
event loop in the child process so the change here is valid only for Android.

Differential Revision: https://phabricator.services.mozilla.com/D18311

--HG--
extra : moz-landing-system : lando

widget/PuppetWidget.cpp

@@ -28,6 +28,7 @@
 #include "nsIWidgetListener.h"
 #include "imgIContainer.h"
 #include "nsView.h"
+#include "nsXPLookAndFeel.h"
 #include "nsPrintfCString.h"
 
 using namespace mozilla;
@@ -903,10 +904,8 @@ struct CursorSurface {
   IntSize mSize;
 };
 
-void PuppetWidget::SetCursor(nsCursor aCursor,
-                             imgIContainer* aCursorImage,
-                             uint32_t aHotspotX,
-                             uint32_t aHotspotY) {
+void PuppetWidget::SetCursor(nsCursor aCursor, imgIContainer* aCursorImage,
+                             uint32_t aHotspotX, uint32_t aHotspotY) {
   if (!mTabChild) {
     return;
   }
@@ -945,7 +944,8 @@ void PuppetWidget::SetCursor(nsCursor aCursor,
 
   mCustomCursor = nullptr;
 
-  nsDependentCString cursorData(customCursorData ? customCursorData.get() : "", length);
+  nsDependentCString cursorData(customCursorData ? customCursorData.get() : "",
+                                length);
   if (!mTabChild->SendSetCursor(aCursor, hasCustomCursor, cursorData,
                                 customCursorSize.width, customCursorSize.height,
                                 stride, format, aHotspotX, aHotspotY, force)) {
@@ -1409,6 +1409,9 @@ nsresult PuppetWidget::SetPrefersReducedMotionOverrideForTest(bool aValue) {
     return NS_ERROR_FAILURE;
   }
 
+  nsXPLookAndFeel::GetInstance()->SetPrefersReducedMotionOverrideForTest(
+      aValue);
+
   mTabChild->SendSetPrefersReducedMotionOverrideForTest(aValue);
   return NS_OK;
 }
@@ -1418,6 +1421,7 @@ nsresult PuppetWidget::ResetPrefersReducedMotionOverrideForTest() {
     return NS_ERROR_FAILURE;
   }
 
+  nsXPLookAndFeel::GetInstance()->ResetPrefersReducedMotionOverrideForTest();
   mTabChild->SendResetPrefersReducedMotionOverrideForTest();
   return NS_OK;
 }

widget/android/nsLookAndFeel.cpp

@@ -21,9 +21,6 @@ AndroidSystemColors nsLookAndFeel::mSystemColors;
 bool nsLookAndFeel::mInitializedShowPassword = false;
 bool nsLookAndFeel::mShowPassword = true;
 
-bool nsLookAndFeel::mIsInPrefersReducedMotionForTest = false;
-bool nsLookAndFeel::mPrefersReducedMotionForTest = false;
-
 static const char16_t UNICODE_BULLET = 0x2022;
 
 nsLookAndFeel::nsLookAndFeel() : nsXPLookAndFeel() {}
@@ -389,8 +386,8 @@ nsresult nsLookAndFeel::GetIntImpl(IntID aID, int32_t& aResult) {
       break;
 
     case eIntID_PrefersReducedMotion:
-      if (mIsInPrefersReducedMotionForTest) {
-        aResult = mPrefersReducedMotionForTest ? 1 : 0;
+      if (sIsInPrefersReducedMotionForTest) {
+        aResult = sPrefersReducedMotionForTest ? 1 : 0;
         break;
       }
       aResult = java::GeckoSystemStateListener::PrefersReducedMotion() ? 1 : 0;

widget/android/nsLookAndFeel.h

@@ -27,22 +27,11 @@ class nsLookAndFeel final : public nsXPLookAndFeel {
   virtual void SetIntCacheImpl(
       const nsTArray<LookAndFeelInt>& aLookAndFeelIntCache) override;
 
-  void SetPrefersReducedMotionOverrideForTest(bool aValue) {
-    mIsInPrefersReducedMotionForTest = true;
-    mPrefersReducedMotionForTest = aValue;
-  }
-  void ResetPrefersReducedMotionOverrideForTest() {
-    mIsInPrefersReducedMotionForTest = false;
-    mPrefersReducedMotionForTest = false;
-  }
-
  protected:
   static bool mInitializedSystemColors;
   static mozilla::AndroidSystemColors mSystemColors;
   static bool mInitializedShowPassword;
   static bool mShowPassword;
-  static bool mIsInPrefersReducedMotionForTest;
-  static bool mPrefersReducedMotionForTest;
 
   nsresult GetSystemColors();
 

widget/android/nsWindow.cpp

@@ -2186,20 +2186,15 @@ void nsWindow::RecvScreenPixels(Shmem&& aMem, const ScreenIntSize& aSize) {
 }
 
 nsresult nsWindow::SetPrefersReducedMotionOverrideForTest(bool aValue) {
-  nsXPLookAndFeel* xpLookAndFeel = nsLookAndFeel::GetInstance();
-
-  static_cast<nsLookAndFeel*>(xpLookAndFeel)
-      ->SetPrefersReducedMotionOverrideForTest(aValue);
+  nsXPLookAndFeel::GetInstance()->SetPrefersReducedMotionOverrideForTest(
+      aValue);
 
   java::GeckoSystemStateListener::NotifyPrefersReducedMotionChangedForTest();
   return NS_OK;
 }
 
 nsresult nsWindow::ResetPrefersReducedMotionOverrideForTest() {
-  nsXPLookAndFeel* xpLookAndFeel = nsLookAndFeel::GetInstance();
-
-  static_cast<nsLookAndFeel*>(xpLookAndFeel)
-      ->ResetPrefersReducedMotionOverrideForTest();
+  nsXPLookAndFeel::GetInstance()->ResetPrefersReducedMotionOverrideForTest();
   return NS_OK;
 }
 

widget/nsXPLookAndFeel.cpp

@@ -216,6 +216,8 @@ bool nsXPLookAndFeel::sInitialized = false;
 bool nsXPLookAndFeel::sUseNativeColors = true;
 bool nsXPLookAndFeel::sUseStandinsForNativeColors = false;
 bool nsXPLookAndFeel::sFindbarModalHighlight = false;
+bool nsXPLookAndFeel::sIsInPrefersReducedMotionForTest = false;
+bool nsXPLookAndFeel::sPrefersReducedMotionForTest = false;
 
 nsXPLookAndFeel* nsXPLookAndFeel::sInstance = nullptr;
 bool nsXPLookAndFeel::sShutdown = false;

widget/nsXPLookAndFeel.h

@@ -80,6 +80,15 @@ 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();
 
@@ -112,6 +121,9 @@ class nsXPLookAndFeel : public mozilla::LookAndFeel {
   static nsXPLookAndFeel* sInstance;
   static bool sShutdown;
 
+  static bool sIsInPrefersReducedMotionForTest;
+  static bool sPrefersReducedMotionForTest;
+
   // True if we shouldn't clear the cache value in RefreshImpl().
   // NOTE: This should be used only for testing.
   bool mShouldRetainCacheForTest;