Bug 1448763 part 1 - Make DOMIntersectionObserver use nsStyleSides for mRootMargin, and use Servo code to serialize it. r=emilio

MozReview-Commit-ID: 8RsoLflRtzE

--HG--
extra : rebase_source : 7e9c53dafe473e77087c880ab39e5265638f0f7e

dom/base/DOMIntersectionObserver.cpp

@@ -10,7 +10,7 @@
 #include "nsIFrame.h"
 #include "nsContentUtils.h"
 #include "nsLayoutUtils.h"
-#include "mozilla/ServoCSSParser.h"
+#include "mozilla/ServoBindings.h"
 
 namespace mozilla {
 namespace dom {
@@ -116,14 +116,14 @@ DOMIntersectionObserver::Constructor(const mozilla::dom::GlobalObject& aGlobal,
 bool
 DOMIntersectionObserver::SetRootMargin(const nsAString& aString)
 {
-  return ServoCSSParser::ParseIntersectionObserverRootMargin(aString,
+  return Servo_IntersectionObserverRootMargin_Parse(&aString, &mRootMargin);
-                                                             &mRootMargin);
 }
 
 void
 DOMIntersectionObserver::GetRootMargin(mozilla::dom::DOMString& aRetVal)
 {
-  mRootMargin.AppendToString(eCSSProperty_DOM, aRetVal);
+  nsString& retVal = aRetVal;
+  Servo_IntersectionObserverRootMargin_ToString(&mRootMargin, &retVal);
 }
 
 void
@@ -306,15 +306,7 @@ DOMIntersectionObserver::Update(nsIDocument* aDocument, DOMHighResTimeStamp time
   NS_FOR_CSS_SIDES(side) {
     nscoord basis = side == eSideTop || side == eSideBottom ?
       rootRect.Height() : rootRect.Width();
-    nsCSSValue value = mRootMargin.*nsCSSRect::sides[side];
+    nsStyleCoord coord = mRootMargin.Get(side);
-    nsStyleCoord coord;
-    if (value.IsPixelLengthUnit()) {
-      coord.SetCoordValue(value.GetPixelLength());
-    } else if (value.IsPercentLengthUnit()) {
-      coord.SetPercentValue(value.GetPercentValue());
-    } else {
-      MOZ_ASSERT_UNREACHABLE("invalid length unit");
-    }
     rootMargin.Side(side) = nsLayoutUtils::ComputeCBDependentValue(basis, coord);
   }
 

dom/base/DOMIntersectionObserver.h

@@ -8,7 +8,7 @@
 #define DOMIntersectionObserver_h
 
 #include "mozilla/dom/IntersectionObserverBinding.h"
-#include "nsCSSValue.h"
+#include "nsStyleCoord.h"
 #include "nsTArray.h"
 
 using mozilla::dom::DOMRect;
@@ -177,7 +177,7 @@ protected:
   RefPtr<nsIDocument>                             mDocument;
   RefPtr<mozilla::dom::IntersectionCallback>      mCallback;
   RefPtr<Element>                                 mRoot;
-  nsCSSRect                                       mRootMargin;
+  nsStyleSides                                    mRootMargin;
   nsTArray<double>                                mThresholds;
 
   // Holds raw pointers which are explicitly cleared by UnlinkTarget().

layout/style/ServoBindingList.h

@@ -836,9 +836,10 @@ SERVO_BINDING_FUNC(Servo_ComputeColor, bool,
                    nscolor* result_color,
                    bool* was_current_color,
                    mozilla::css::Loader* loader)
-SERVO_BINDING_FUNC(Servo_ParseIntersectionObserverRootMargin, bool,
+SERVO_BINDING_FUNC(Servo_IntersectionObserverRootMargin_Parse, bool,
-                   const nsAString* value,
+                   const nsAString* value, nsStyleSides* result)
-                   nsCSSRect* result);
+SERVO_BINDING_FUNC(Servo_IntersectionObserverRootMargin_ToString, void,
+                   const nsStyleSides* rect, nsAString* result)
 // Returning false means the parsed transform contains relative lengths or
 // percentage value, so we cannot compute the matrix. In this case, we keep
 // |result| and |contains_3d_transform| as-is.

layout/style/ServoBindings.toml

@@ -282,8 +282,6 @@ whitelist-types = [
     "nsCSSPropertyID",
     "nsCSSPropertyIDSet",
     "nsCSSProps",
-    "nsCSSRect",
-    "nsCSSRect_heap",
     "nsCSSShadowArray",
     "nsCSSValue",
     "nsCSSValueFloatColor",
@@ -334,6 +332,7 @@ whitelist-types = [
     "nsStyleOutline",
     "nsStylePadding",
     "nsStylePosition",
+    "nsStyleSides",
     "nsStyleSVG",
     "nsStyleSVGOpacitySource",
     "nsStyleSVGPaint",
@@ -534,7 +533,6 @@ structs-types = [
     "nsCSSKeyword",
     "nsCSSPropertyID",
     "nsCSSPropertyIDSet",
-    "nsCSSRect",
     "nsCSSShadowArray",
     "nsCSSUnit",
     "nsCSSValue",
@@ -580,6 +578,7 @@ structs-types = [
     "nsStyleSVGOpacitySource",
     "nsStyleSVGPaint",
     "nsStyleSVGReset",
+    "nsStyleSides",
     "nsStyleTable",
     "nsStyleTableBorder",
     "nsStyleText",

layout/style/ServoCSSParser.cpp

@@ -33,13 +33,6 @@ ServoCSSParser::ComputeColor(ServoStyleSet* aStyleSet,
                             aWasCurrentColor, aLoader);
 }
 
-/* static */ bool
-ServoCSSParser::ParseIntersectionObserverRootMargin(const nsAString& aValue,
-                                                    nsCSSRect* aResult)
-{
-  return Servo_ParseIntersectionObserverRootMargin(&aValue, aResult);
-}
-
 /* static */ already_AddRefed<RawServoDeclarationBlock>
 ServoCSSParser::ParseProperty(nsCSSPropertyID aProperty,
                               const nsAString& aValue,

layout/style/ServoCSSParser.h

@@ -72,17 +72,6 @@ public:
                            bool* aWasCurrentColor = nullptr,
                            css::Loader* aLoader = nullptr);
 
-  /**
-   * Parses a IntersectionObserver's initialization dictionary's rootMargin
-   * property.
-   *
-   * @param aValue The rootMargin value.
-   * @param aResult The nsCSSRect object to write the result into.
-   * @return Whether the value was successfully parsed.
-   */
-  static bool ParseIntersectionObserverRootMargin(const nsAString& aValue,
-                                                  nsCSSRect* aResult);
-
   /**
    * Parse a string representing a CSS property value into a
    * RawServoDeclarationBlock.