From 325afc0ab8eeb2545d372e8ae89d1a83b2985066 Mon Sep 17 00:00:00 2001
From: wolfbeast <mcwerewolf@gmail.com>
Date: Tue, 4 Sep 2018 17:55:18 +0200
Subject: [PATCH] Part 1. Move IsLocalRefURL to nsContentUtils to reuse this
 function. (port-rewrite)

`IsLocalRefURL` is originally designed to be used by URLValue only.
Since we need this function in SVGUseElement::LookupHref too, move it to nsContentUtils as a util function.
---
 layout/style/nsCSSValue.cpp | 20 ++------------------
 1 file changed, 2 insertions(+), 18 deletions(-)

diff --git a/layout/style/nsCSSValue.cpp b/layout/style/nsCSSValue.cpp
index baf5b78973..e9c391737f 100644
--- a/layout/style/nsCSSValue.cpp
+++ b/layout/style/nsCSSValue.cpp
@@ -29,22 +29,6 @@
 
 using namespace mozilla;
 
-static bool
-IsLocalRefURL(nsStringBuffer* aString)
-{
-  // Find the first non-"C0 controls + space" character.
-  char16_t* current = static_cast<char16_t*>(aString->Data());
-  for (; *current != '\0'; current++) {
-    if (*current > 0x20) {
-      // if the first non-"C0 controls + space" character is '#', this is a
-      // local-ref URL.
-      return *current == '#';
-    }
-  }
-
-  return false;
-}
-
 nsCSSValue::nsCSSValue(int32_t aValue, nsCSSUnit aUnit)
   : mUnit(aUnit)
 {
@@ -2723,7 +2707,7 @@ css::URLValueData::URLValueData(already_AddRefed<PtrHolder<nsIURI>> aURI,
   , mReferrer(Move(aReferrer))
   , mOriginPrincipal(Move(aOriginPrincipal))
   , mURIResolved(true)
-  , mIsLocalRef(IsLocalRefURL(aString))
+  , mIsLocalRef(nsContentUtils::IsLocalRefURL(aString))
 {
   MOZ_ASSERT(mString);
   MOZ_ASSERT(mBaseURI);
@@ -2740,7 +2724,7 @@ css::URLValueData::URLValueData(nsStringBuffer* aString,
   , mReferrer(Move(aReferrer))
   , mOriginPrincipal(Move(aOriginPrincipal))
   , mURIResolved(false)
-  , mIsLocalRef(IsLocalRefURL(aString))
+  , mIsLocalRef(nsContentUtils::IsLocalRefURL(aString))
 {
   MOZ_ASSERT(aString);
   MOZ_ASSERT(mBaseURI);