import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

dom/xslt/base/txNamespaceMap.cpp

@@ -0,0 +1,98 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* 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 "txNamespaceMap.h"
+#include "nsGkAtoms.h"
+#include "txXPathNode.h"
+
+txNamespaceMap::txNamespaceMap()
+{
+}
+
+txNamespaceMap::txNamespaceMap(const txNamespaceMap& aOther)
+    : mPrefixes(aOther.mPrefixes)
+{
+    mNamespaces = aOther.mNamespaces; //bah! I want a copy-constructor!
+}
+
+nsresult
+txNamespaceMap::mapNamespace(nsIAtom* aPrefix, const nsAString& aNamespaceURI)
+{
+    nsIAtom* prefix = aPrefix == nsGkAtoms::_empty ? nullptr : aPrefix;
+
+    int32_t nsId;
+    if (prefix && aNamespaceURI.IsEmpty()) {
+        // Remove the mapping
+        int32_t index = mPrefixes.IndexOf(prefix);
+        if (index >= 0) {
+            mPrefixes.RemoveObjectAt(index);
+            mNamespaces.RemoveElementAt(index);
+        }
+
+        return NS_OK;
+    }
+
+    if (aNamespaceURI.IsEmpty()) {
+        // Set default to empty namespace
+        nsId = kNameSpaceID_None;
+    }
+    else {
+        nsId = txNamespaceManager::getNamespaceID(aNamespaceURI);
+        NS_ENSURE_FALSE(nsId == kNameSpaceID_Unknown, NS_ERROR_FAILURE);
+    }
+
+    // Check if the mapping already exists
+    int32_t index = mPrefixes.IndexOf(prefix);
+    if (index >= 0) {
+        mNamespaces.ElementAt(index) = nsId;
+
+        return NS_OK;
+    }
+
+    // New mapping
+    if (!mPrefixes.AppendObject(prefix)) {
+        return NS_ERROR_OUT_OF_MEMORY;
+    }
+    
+    if (mNamespaces.AppendElement(nsId) == nullptr) {
+        mPrefixes.RemoveObjectAt(mPrefixes.Count() - 1);
+
+        return NS_ERROR_OUT_OF_MEMORY;
+    }
+
+    return NS_OK;
+}
+
+int32_t
+txNamespaceMap::lookupNamespace(nsIAtom* aPrefix)
+{
+    if (aPrefix == nsGkAtoms::xml) {
+        return kNameSpaceID_XML;
+    }
+
+    nsIAtom* prefix = aPrefix == nsGkAtoms::_empty ? 0 : aPrefix;
+
+    int32_t index = mPrefixes.IndexOf(prefix);
+    if (index >= 0) {
+        return mNamespaces.SafeElementAt(index, kNameSpaceID_Unknown);
+    }
+
+    if (!prefix) {
+        return kNameSpaceID_None;
+    }
+
+    return kNameSpaceID_Unknown;
+}
+
+int32_t
+txNamespaceMap::lookupNamespaceWithDefault(const nsAString& aPrefix)
+{
+    nsCOMPtr<nsIAtom> prefix = NS_Atomize(aPrefix);
+    if (prefix != nsGkAtoms::_poundDefault) {
+        return lookupNamespace(prefix);
+    }
+
+    return lookupNamespace(nullptr);
+}