1 files changed, 75 insertions, 0 deletions
diff --git a/dom/base/nsXMLNameSpaceMap.h b/dom/base/nsXMLNameSpaceMap.h
new file mode 100644
index 0000000000..c8c1eb8baf
--- /dev/null
+++ b/dom/base/nsXMLNameSpaceMap.h
@@ -0,0 +1,75 @@
+/* -*- 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 nsXMLNameSpaceMap_h_
+#define nsXMLNameSpaceMap_h_
+
+#include "nsString.h"
+#include "nsTArray.h"
+#include "nsCOMPtr.h"
+#include "nsIAtom.h"
+
+struct nsNameSpaceEntry
+{
+  explicit nsNameSpaceEntry(nsIAtom* aPrefix)
+    : prefix(aPrefix) {}
+
+  nsCOMPtr<nsIAtom> prefix;
+  MOZ_INIT_OUTSIDE_CTOR int32_t nameSpaceID;
+};
+
+/**
+ * nsXMLNameSpaceMap contains a set of prefixes which are mapped onto
+ * namespaces.  It allows the set to be searched by prefix or by namespace ID.
+ */
+class nsXMLNameSpaceMap
+{
+public:
+  /**
+   * Allocates a new nsXMLNameSpaceMap (with new()) and if aForXML is
+   * true initializes it with the xmlns and xml namespaces.
+   */
+  static nsXMLNameSpaceMap* Create(bool aForXML);
+
+  /**
+   * Add a prefix and its corresponding namespace ID to the map.
+   * Passing a null |aPrefix| corresponds to the default namespace, which may
+   * be set to something other than kNameSpaceID_None.
+   */
+  nsresult AddPrefix(nsIAtom *aPrefix, int32_t aNameSpaceID);
+
+  /**
+   * Add a prefix and a namespace URI to the map.  The URI will be converted
+   * to its corresponding namespace ID.
+   */
+  nsresult AddPrefix(nsIAtom *aPrefix, nsString &aURI);
+
+  /*
+   * Returns the namespace ID for the given prefix, if it is in the map.
+   * If |aPrefix| is null and is not in the map, then a null namespace
+   * (kNameSpaceID_None) is returned.  If |aPrefix| is non-null and is not in
+   * the map, then kNameSpaceID_Unknown is returned.
+   */
+  int32_t FindNameSpaceID(nsIAtom *aPrefix) const;
+
+  /**
+   * If the given namespace ID is in the map, then the first prefix which
+   * maps to that namespace is returned.  Otherwise, null is returned.
+   */
+  nsIAtom* FindPrefix(int32_t aNameSpaceID) const;
+
+  /* Removes all prefix mappings. */
+  void Clear();
+
+  ~nsXMLNameSpaceMap() { Clear(); }
+
+private:
+  nsXMLNameSpaceMap();  // use Create() to create new instances
+
+  nsTArray<nsNameSpaceEntry> mNameSpaces;
+};
+
+#endif