1 files changed, 99 insertions, 0 deletions
diff --git a/dom/xslt/xslt/txGenerateIdFunctionCall.cpp b/dom/xslt/xslt/txGenerateIdFunctionCall.cpp
new file mode 100644
index 0000000000..775d8a0a81
--- /dev/null
+++ b/dom/xslt/xslt/txGenerateIdFunctionCall.cpp
@@ -0,0 +1,99 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 "nsGkAtoms.h"
+#include "txIXPathContext.h"
+#include "txNodeSet.h"
+#include "txXPathTreeWalker.h"
+#include "txXSLTFunctions.h"
+#include "txExecutionState.h"
+
+/*
+  Implementation of XSLT 1.0 extension function: generate-id
+*/
+
+/**
+ * Creates a new generate-id function call
+ **/
+GenerateIdFunctionCall::GenerateIdFunctionCall() = default;
+
+/**
+ * Evaluates this Expr based on the given context node and processor state
+ * @param context the context node for evaluation of this Expr
+ * @param ps the ContextState containing the stack information needed
+ * for evaluation
+ * @return the result of the evaluation
+ * @see FunctionCall.h
+ **/
+nsresult GenerateIdFunctionCall::evaluate(txIEvalContext* aContext,
+                                          txAExprResult** aResult) {
+  *aResult = nullptr;
+  if (!requireParams(0, 1, aContext)) return NS_ERROR_XPATH_BAD_ARGUMENT_COUNT;
+
+  txExecutionState* es =
+      static_cast<txExecutionState*>(aContext->getPrivateContext());
+  if (!es) {
+    NS_ERROR(
+        "called xslt extension function \"generate-id\" with wrong context");
+    return NS_ERROR_UNEXPECTED;
+  }
+
+  nsresult rv = NS_OK;
+  if (mParams.IsEmpty()) {
+    StringResult* strRes;
+    rv = aContext->recycler()->getStringResult(&strRes);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    txXPathNodeUtils::getXSLTId(aContext->getContextNode(),
+                                es->getSourceDocument(), strRes->mValue);
+
+    *aResult = strRes;
+
+    return NS_OK;
+  }
+
+  RefPtr<txNodeSet> nodes;
+  rv = evaluateToNodeSet(mParams[0], aContext, getter_AddRefs(nodes));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  if (nodes->isEmpty()) {
+    aContext->recycler()->getEmptyStringResult(aResult);
+
+    return NS_OK;
+  }
+
+  StringResult* strRes;
+  rv = aContext->recycler()->getStringResult(&strRes);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  txXPathNodeUtils::getXSLTId(nodes->get(0), es->getSourceDocument(),
+                              strRes->mValue);
+
+  *aResult = strRes;
+
+  return NS_OK;
+}
+
+Expr::ResultType GenerateIdFunctionCall::getReturnType() {
+  return STRING_RESULT;
+}
+
+bool GenerateIdFunctionCall::isSensitiveTo(ContextSensitivity aContext) {
+  if (aContext & PRIVATE_CONTEXT) {
+    return true;
+  }
+
+  if (mParams.IsEmpty()) {
+    return !!(aContext & NODE_CONTEXT);
+  }
+
+  return argsSensitiveTo(aContext);
+}
+
+#ifdef TX_TO_STRING
+void GenerateIdFunctionCall::appendName(nsAString& aDest) {
+  aDest.Append(nsGkAtoms::generateId->GetUTF16String());
+}
+#endif