Bug 1288302 - Part 6: Add FFI function to set nsStyleImageRequest values. r=xidorn

MozReview-Commit-ID: 448vAeDiKX7

layout/style/ServoBindings.cpp

@@ -734,6 +734,35 @@ Gecko_SetGradientImageValue(nsStyleImage* aImage, nsStyleGradient* aGradient)
   aImage->SetGradientData(aGradient);
 }
 
+void
+Gecko_SetUrlImageValue(nsStyleImage* aImage,
+                       const uint8_t* aURLString, uint32_t aURLStringLength,
+                       ThreadSafeURIHolder* aBaseURI,
+                       ThreadSafeURIHolder* aReferrer,
+                       ThreadSafePrincipalHolder* aPrincipal)
+{
+  MOZ_ASSERT(aImage);
+  MOZ_ASSERT(aURLString);
+  MOZ_ASSERT(aBaseURI);
+  MOZ_ASSERT(aReferrer);
+  MOZ_ASSERT(aPrincipal);
+
+  nsString url;
+  nsDependentCSubstring urlString(reinterpret_cast<const char*>(aURLString),
+                                  aURLStringLength);
+  AppendUTF8toUTF16(urlString, url);
+  RefPtr<nsStringBuffer> urlBuffer = nsCSSValue::BufferFromString(url);
+
+  RefPtr<nsStyleImageRequest> req =
+    new nsStyleImageRequest(nsStyleImageRequest::Mode::Track |
+                            nsStyleImageRequest::Mode::Lock,
+                            urlBuffer,
+                            do_AddRef(aBaseURI),
+                            do_AddRef(aReferrer),
+                            do_AddRef(aPrincipal));
+  aImage->SetImageRequest(req.forget());
+}
+
 void
 Gecko_CopyImageValueFrom(nsStyleImage* aImage, const nsStyleImage* aOther)
 {

layout/style/ServoBindings.h

@@ -156,6 +156,10 @@ DECL_BORROWED_MUT_REF_TYPE_FOR(StyleChildrenIterator)
 
 extern "C" {
 
+// Object refcounting.
+NS_DECL_HOLDER_FFI_REFCOUNTING(nsIPrincipal, Principal)
+NS_DECL_HOLDER_FFI_REFCOUNTING(nsIURI, URI)
+
 // DOM Traversal.
 uint32_t Gecko_ChildrenCount(RawGeckoNodeBorrowed node);
 bool Gecko_NodeIsElement(RawGeckoNodeBorrowed node);
@@ -246,9 +250,15 @@ void Gecko_SetListStyleType(nsStyleList* style_struct, uint32_t type);
 void Gecko_CopyListStyleTypeFrom(nsStyleList* dst, const nsStyleList* src);
 
 // background-image style.
-// TODO: support url() values (and maybe element() too?).
+// TODO: support element() and -moz-image()
 void Gecko_SetNullImageValue(nsStyleImage* image);
 void Gecko_SetGradientImageValue(nsStyleImage* image, nsStyleGradient* gradient);
+void Gecko_SetUrlImageValue(nsStyleImage* image,
+                            const uint8_t* url_bytes,
+                            uint32_t url_length,
+                            ThreadSafeURIHolder* base_uri,
+                            ThreadSafeURIHolder* referrer,
+                            ThreadSafePrincipalHolder* principal);
 void Gecko_CopyImageValueFrom(nsStyleImage* image, const nsStyleImage* other);
 
 nsStyleGradient* Gecko_CreateGradient(uint8_t shape,
@@ -257,10 +267,6 @@ nsStyleGradient* Gecko_CreateGradient(uint8_t shape,
                                       bool legacy_syntax,
                                       uint32_t stops);
 
-// Object refcounting.
-NS_DECL_HOLDER_FFI_REFCOUNTING(nsIPrincipal, Principal)
-NS_DECL_HOLDER_FFI_REFCOUNTING(nsIURI, URI)
-
 // Display style.
 void Gecko_SetMozBinding(nsStyleDisplay* style_struct,
                          const uint8_t* string_bytes, uint32_t string_length,