1 files changed, 201 insertions, 0 deletions
diff --git a/dom/svg/SVGTests.cpp b/dom/svg/SVGTests.cpp
new file mode 100644
index 0000000000..6603663445
--- /dev/null
+++ b/dom/svg/SVGTests.cpp
@@ -0,0 +1,201 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/dom/SVGTests.h"
+#include "DOMSVGStringList.h"
+#include "nsIContent.h"
+#include "nsIContentInlines.h"
+#include "mozilla/dom/SVGSwitchElement.h"
+#include "nsCharSeparatedTokenizer.h"
+#include "nsStyleUtil.h"
+#include "mozilla/Preferences.h"
+
+namespace mozilla::dom {
+
+nsStaticAtom* const SVGTests::sStringListNames[2] = {
+    nsGkAtoms::requiredExtensions,
+    nsGkAtoms::systemLanguage,
+};
+
+SVGTests::SVGTests() {
+  mStringListAttributes[LANGUAGE].SetIsCommaSeparated(true);
+}
+
+already_AddRefed<DOMSVGStringList> SVGTests::RequiredExtensions() {
+  return DOMSVGStringList::GetDOMWrapper(&mStringListAttributes[EXTENSIONS],
+                                         AsSVGElement(), true, EXTENSIONS);
+}
+
+already_AddRefed<DOMSVGStringList> SVGTests::SystemLanguage() {
+  return DOMSVGStringList::GetDOMWrapper(&mStringListAttributes[LANGUAGE],
+                                         AsSVGElement(), true, LANGUAGE);
+}
+
+bool SVGTests::HasExtension(const nsAString& aExtension) const {
+#define SVG_SUPPORTED_EXTENSION(str) \
+  if (aExtension.EqualsLiteral(str)) return true;
+  SVG_SUPPORTED_EXTENSION("http://www.w3.org/1999/xhtml")
+  nsNameSpaceManager* nameSpaceManager = nsNameSpaceManager::GetInstance();
+  if (AsSVGElement()->IsInChromeDocument() ||
+      !nameSpaceManager->mMathMLDisabled) {
+    SVG_SUPPORTED_EXTENSION("http://www.w3.org/1998/Math/MathML")
+  }
+#undef SVG_SUPPORTED_EXTENSION
+
+  return false;
+}
+
+bool SVGTests::IsConditionalProcessingAttribute(
+    const nsAtom* aAttribute) const {
+  for (uint32_t i = 0; i < ArrayLength(sStringListNames); i++) {
+    if (aAttribute == sStringListNames[i]) {
+      return true;
+    }
+  }
+  return false;
+}
+
+int32_t SVGTests::GetBestLanguagePreferenceRank(
+    const nsAString& aAcceptLangs) const {
+  if (!mStringListAttributes[LANGUAGE].IsExplicitlySet()) {
+    return -2;
+  }
+
+  int32_t lowestRank = -1;
+
+  for (uint32_t i = 0; i < mStringListAttributes[LANGUAGE].Length(); i++) {
+    int32_t index = 0;
+    for (const nsAString& languageToken :
+         nsCharSeparatedTokenizer(aAcceptLangs, ',').ToRange()) {
+      bool exactMatch = languageToken.Equals(mStringListAttributes[LANGUAGE][i],
+                                             nsCaseInsensitiveStringComparator);
+      bool prefixOnlyMatch =
+          !exactMatch && nsStyleUtil::DashMatchCompare(
+                             mStringListAttributes[LANGUAGE][i], languageToken,
+                             nsCaseInsensitiveStringComparator);
+      if (index == 0 && exactMatch) {
+        // best possible match
+        return 0;
+      }
+      if ((exactMatch || prefixOnlyMatch) &&
+          (lowestRank == -1 || 2 * index + prefixOnlyMatch < lowestRank)) {
+        lowestRank = 2 * index + prefixOnlyMatch;
+      }
+      ++index;
+    }
+  }
+  return lowestRank;
+}
+
+bool SVGTests::PassesConditionalProcessingTestsIgnoringSystemLanguage() const {
+  // Required Extensions
+  //
+  // The requiredExtensions  attribute defines a list of required language
+  // extensions. Language extensions are capabilities within a user agent that
+  // go beyond the feature set defined in the SVG specification.
+  // Each extension is identified by a URI reference.
+  // For now, claim that mozilla's SVG implementation supports XHTML and MathML.
+  if (mStringListAttributes[EXTENSIONS].IsExplicitlySet()) {
+    if (mStringListAttributes[EXTENSIONS].IsEmpty()) {
+      return false;
+    }
+    for (uint32_t i = 0; i < mStringListAttributes[EXTENSIONS].Length(); i++) {
+      if (!HasExtension(mStringListAttributes[EXTENSIONS][i])) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+bool SVGTests::PassesConditionalProcessingTests() const {
+  if (!PassesConditionalProcessingTestsIgnoringSystemLanguage()) {
+    return false;
+  }
+
+  // systemLanguage
+  //
+  // Evaluates to "true" if one of the languages indicated by user preferences
+  // exactly equals one of the languages given in the value of this parameter,
+  // or if one of the languages indicated by user preferences exactly equals a
+  // prefix of one of the languages given in the value of this parameter such
+  // that the first tag character following the prefix is "-".
+  if (mStringListAttributes[LANGUAGE].IsExplicitlySet()) {
+    if (mStringListAttributes[LANGUAGE].IsEmpty()) {
+      return false;
+    }
+
+    // Get our language preferences
+    nsAutoString acceptLangs;
+    Preferences::GetLocalizedString("intl.accept_languages", acceptLangs);
+
+    if (acceptLangs.IsEmpty()) {
+      NS_WARNING(
+          "no default language specified for systemLanguage conditional test");
+      return false;
+    }
+
+    for (uint32_t i = 0; i < mStringListAttributes[LANGUAGE].Length(); i++) {
+      nsCharSeparatedTokenizer languageTokenizer(acceptLangs, ',');
+      while (languageTokenizer.hasMoreTokens()) {
+        if (nsStyleUtil::DashMatchCompare(mStringListAttributes[LANGUAGE][i],
+                                          languageTokenizer.nextToken(),
+                                          nsCaseInsensitiveStringComparator)) {
+          return true;
+        }
+      }
+    }
+    return false;
+  }
+
+  return true;
+}
+
+bool SVGTests::ParseConditionalProcessingAttribute(nsAtom* aAttribute,
+                                                   const nsAString& aValue,
+                                                   nsAttrValue& aResult) {
+  for (uint32_t i = 0; i < ArrayLength(sStringListNames); i++) {
+    if (aAttribute == sStringListNames[i]) {
+      nsresult rv = mStringListAttributes[i].SetValue(aValue);
+      if (NS_FAILED(rv)) {
+        mStringListAttributes[i].Clear();
+      }
+      MaybeInvalidate();
+      return true;
+    }
+  }
+  return false;
+}
+
+void SVGTests::UnsetAttr(const nsAtom* aAttribute) {
+  for (uint32_t i = 0; i < ArrayLength(sStringListNames); i++) {
+    if (aAttribute == sStringListNames[i]) {
+      mStringListAttributes[i].Clear();
+      MaybeInvalidate();
+      return;
+    }
+  }
+}
+
+nsStaticAtom* SVGTests::GetAttrName(uint8_t aAttrEnum) const {
+  return sStringListNames[aAttrEnum];
+}
+
+void SVGTests::GetAttrValue(uint8_t aAttrEnum, nsAttrValue& aValue) const {
+  MOZ_ASSERT(aAttrEnum < ArrayLength(sStringListNames),
+             "aAttrEnum out of range");
+  aValue.SetTo(mStringListAttributes[aAttrEnum], nullptr);
+}
+
+void SVGTests::MaybeInvalidate() {
+  nsIContent* parent = AsSVGElement()->GetFlattenedTreeParent();
+
+  if (auto* svgSwitch = SVGSwitchElement::FromNodeOrNull(parent)) {
+    svgSwitch->MaybeInvalidate();
+  }
+}
+
+}  // namespace mozilla::dom