1 files changed, 137 insertions, 0 deletions
diff --git a/dom/svg/SVGStringList.h b/dom/svg/SVGStringList.h
new file mode 100644
index 0000000000..cedf42aa60
--- /dev/null
+++ b/dom/svg/SVGStringList.h
@@ -0,0 +1,137 @@
+/* -*- 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/. */
+
+#ifndef DOM_SVG_SVGSTRINGLIST_H_
+#define DOM_SVG_SVGSTRINGLIST_H_
+
+#include "nsDebug.h"
+#include "nsTArray.h"
+#include "nsString.h"  // IWYU pragma: keep
+
+namespace mozilla {
+
+namespace dom {
+class DOMSVGStringList;
+}
+
+/**
+ *
+ * The DOM wrapper class for this class is DOMSVGStringList.
+ */
+class SVGStringList {
+  friend class dom::DOMSVGStringList;
+
+ public:
+  SVGStringList() : mIsSet(false), mIsCommaSeparated(false) {}
+  ~SVGStringList() = default;
+
+  void SetIsCommaSeparated(bool aIsCommaSeparated) {
+    mIsCommaSeparated = aIsCommaSeparated;
+  }
+  nsresult SetValue(const nsAString& aValue);
+
+  void Clear() {
+    mStrings.Clear();
+    mIsSet = false;
+  }
+
+  /// This may return an incomplete string on OOM, but that's acceptable.
+  void GetValue(nsAString& aValue) const;
+
+  bool IsEmpty() const { return mStrings.IsEmpty(); }
+
+  uint32_t Length() const { return mStrings.Length(); }
+
+  const nsAString& operator[](uint32_t aIndex) const {
+    return mStrings[aIndex];
+  }
+
+  bool operator==(const SVGStringList& rhs) const {
+    return mStrings == rhs.mStrings;
+  }
+
+  bool SetCapacity(uint32_t size) {
+    return mStrings.SetCapacity(size, fallible);
+  }
+
+  void Compact() { mStrings.Compact(); }
+
+  // Returns true if the value of this stringlist has been explicitly
+  // set by markup or a DOM call, false otherwise.
+  bool IsExplicitlySet() const { return mIsSet; }
+
+  // Access to methods that can modify objects of this type is deliberately
+  // limited. This is to reduce the chances of someone modifying objects of
+  // this type without taking the necessary steps to keep DOM wrappers in sync.
+  // If you need wider access to these methods, consider adding a method to
+  // DOMSVGAnimatedStringList and having that class act as an intermediary so it
+  // can take care of keeping DOM wrappers in sync.
+
+ protected:
+  /**
+   * This may fail on OOM if the internal capacity needs to be increased, in
+   * which case the list will be left unmodified.
+   */
+  nsresult CopyFrom(const SVGStringList& rhs);
+
+  nsAString& operator[](uint32_t aIndex) { return mStrings[aIndex]; }
+
+  /**
+   * This may fail (return false) on OOM if the internal capacity is being
+   * increased, in which case the list will be left unmodified.
+   */
+  bool SetLength(uint32_t aStringOfItems) {
+    return mStrings.SetLength(aStringOfItems, fallible);
+  }
+
+ private:
+  // Marking the following private only serves to show which methods are only
+  // used by our friend classes (as opposed to our subclasses) - it doesn't
+  // really provide additional safety.
+
+  bool InsertItem(uint32_t aIndex, const nsAString& aString) {
+    if (aIndex >= mStrings.Length()) {
+      aIndex = mStrings.Length();
+    }
+    if (mStrings.InsertElementAt(aIndex, aString, fallible)) {
+      mIsSet = true;
+      return true;
+    }
+    return false;
+  }
+
+  void ReplaceItem(uint32_t aIndex, const nsAString& aString) {
+    MOZ_ASSERT(aIndex < mStrings.Length(),
+               "DOM wrapper caller should have raised INDEX_SIZE_ERR");
+    mStrings[aIndex] = aString;
+  }
+
+  void RemoveItem(uint32_t aIndex) {
+    MOZ_ASSERT(aIndex < mStrings.Length(),
+               "DOM wrapper caller should have raised INDEX_SIZE_ERR");
+    mStrings.RemoveElementAt(aIndex);
+  }
+
+  bool AppendItem(const nsAString& aString) {
+    if (mStrings.AppendElement(aString, fallible)) {
+      mIsSet = true;
+      return true;
+    }
+    return false;
+  }
+
+ protected:
+  /* See SVGLengthList for the rationale for using FallibleTArray<float> instead
+   * of FallibleTArray<float, 1>.
+   */
+  FallibleTArray<nsString> mStrings;
+  bool mIsSet;
+  bool mIsCommaSeparated;
+};
+
+}  // namespace mozilla
+
+#endif  // DOM_SVG_SVGSTRINGLIST_H_