1 files changed, 62 insertions, 0 deletions
diff --git a/layout/style/nsDOMCSSValueList.cpp b/layout/style/nsDOMCSSValueList.cpp
new file mode 100644
index 0000000000..6cee83e509
--- /dev/null
+++ b/layout/style/nsDOMCSSValueList.cpp
@@ -0,0 +1,62 @@
+/* -*- 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/. */
+
+/* DOM object representing lists of values in DOM computed style */
+
+#include "nsDOMCSSValueList.h"
+
+#include <utility>
+
+#include "mozilla/ErrorResult.h"
+#include "nsString.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+nsDOMCSSValueList::nsDOMCSSValueList(bool aCommaDelimited)
+    : CSSValue(), mCommaDelimited(aCommaDelimited) {}
+
+nsDOMCSSValueList::~nsDOMCSSValueList() = default;
+
+void nsDOMCSSValueList::AppendCSSValue(already_AddRefed<CSSValue> aValue) {
+  RefPtr<CSSValue> val = aValue;
+  mCSSValues.AppendElement(std::move(val));
+}
+
+void nsDOMCSSValueList::GetCssText(nsAString& aCssText) {
+  aCssText.Truncate();
+
+  uint32_t count = mCSSValues.Length();
+
+  nsAutoString separator;
+  if (mCommaDelimited) {
+    separator.AssignLiteral(", ");
+  } else {
+    separator.Assign(char16_t(' '));
+  }
+
+  nsAutoString tmpStr;
+  for (uint32_t i = 0; i < count; ++i) {
+    CSSValue* cssValue = mCSSValues[i];
+    NS_ASSERTION(cssValue,
+                 "Eek!  Someone filled the value list with null CSSValues!");
+    if (cssValue) {
+      cssValue->GetCssText(tmpStr);
+      if (tmpStr.IsEmpty()) {
+#ifdef DEBUG_caillon
+        NS_ERROR("Eek!  An empty CSSValue!  Bad!");
+#endif
+        continue;
+      }
+      // If this isn't the first item in the list, then
+      // it's ok to append a separator.
+      if (!aCssText.IsEmpty()) {
+        aCssText.Append(separator);
+      }
+      aCssText.Append(tmpStr);
+    }
+  }
+}