Bug 1543304 - Add MOZ_DBG support for nsCSSPropertyID and nsCSSPropertyIDSet; r=heycam

Differential Revision: https://phabricator.services.mozilla.com/D26856

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

layout/style/nsCSSPropertyID.h.in

@@ -35,6 +35,9 @@ $property_ids
   eCSSPropertyExtra_variable,
 };
 
+// MOZ_DBG support is defined in nsCSSProps.h since it depends on
+// nsCSSProps::GetStringValue
+
 const nsCSSPropertyID
   eCSSProperty_COUNT_no_shorthands = $longhand_count;
 const nsCSSPropertyID

layout/style/nsCSSPropertyIDSet.h

@@ -7,15 +7,16 @@
 #ifndef nsCSSPropertyIDSet_h__
 #define nsCSSPropertyIDSet_h__
 
-#include "mozilla/ArrayUtils.h"
-
-#include "nsCSSPropertyID.h"
-#include <limits.h>  // for CHAR_BIT
 #include <initializer_list>
+#include <limits.h>  // for CHAR_BIT
+#include <ostream>
 
+#include "mozilla/ArrayUtils.h"
 // For COMPOSITOR_ANIMATABLE_PROPERTY_LIST and
 // COMPOSITOR_ANIMATABLE_PROPERTY_LIST_LENGTH
 #include "mozilla/CompositorAnimatableProperties.h"
+#include "nsCSSProps.h"  // For operator<< for nsCSSPropertyID
+#include "nsCSSPropertyID.h"
 
 /**
  * nsCSSPropertyIDSet maintains a set of non-shorthand CSS properties.  In
@@ -270,4 +271,15 @@ class nsCSSPropertyIDSet {
   property_set_type mProperties[kChunkCount];
 };
 
+// MOZ_DBG support
+
+inline std::ostream& operator<<(std::ostream& aOut,
+                                const nsCSSPropertyIDSet& aPropertySet) {
+  AutoTArray<nsCSSPropertyID, 16> properties;
+  for (nsCSSPropertyID property : aPropertySet) {
+    properties.AppendElement(property);
+  }
+  return aOut << properties;
+}
+
 #endif /* !defined(nsCSSPropertyIDSet_h__) */

layout/style/nsCSSProps.h

@@ -13,7 +13,9 @@
 #define nsCSSProps_h___
 
 #include <limits>
+#include <ostream>
 #include <type_traits>
+
 #include "nsString.h"
 #include "nsCSSPropertyID.h"
 #include "nsStyleStructFwd.h"
@@ -312,4 +314,10 @@ class nsCSSProps {
   static const KTableEntry kVerticalAlignKTable[];
 };
 
+// MOZ_DBG support for nsCSSPropertyID
+
+inline std::ostream& operator<<(std::ostream& aOut, nsCSSPropertyID aProperty) {
+  return aOut << nsCSSProps::GetStringValue(aProperty);
+}
+
 #endif /* nsCSSProps_h___ */