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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /dom/xslt/xpath/txPredicateList.cpp
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'dom/xslt/xpath/txPredicateList.cpp')
-rw-r--r--dom/xslt/xpath/txPredicateList.cpp85
1 files changed, 85 insertions, 0 deletions
diff --git a/dom/xslt/xpath/txPredicateList.cpp b/dom/xslt/xpath/txPredicateList.cpp
new file mode 100644
index 000000000..937d4148f
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+++ b/dom/xslt/xpath/txPredicateList.cpp
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+/* -*- 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 "txExpr.h"
+#include "txNodeSet.h"
+#include "txNodeSetContext.h"
+
+/*
+ * Represents an ordered list of Predicates,
+ * for use with Step and Filter Expressions
+ */
+
+nsresult
+PredicateList::evaluatePredicates(txNodeSet* nodes,
+ txIMatchContext* aContext)
+{
+ NS_ASSERTION(nodes, "called evaluatePredicates with nullptr NodeSet");
+ nsresult rv = NS_OK;
+
+ uint32_t i, len = mPredicates.Length();
+ for (i = 0; i < len && !nodes->isEmpty(); ++i) {
+ txNodeSetContext predContext(nodes, aContext);
+ /*
+ * add nodes to newNodes that match the expression
+ * or, if the result is a number, add the node with the right
+ * position
+ */
+ int32_t index = 0;
+ while (predContext.hasNext()) {
+ predContext.next();
+ RefPtr<txAExprResult> exprResult;
+ rv = mPredicates[i]->evaluate(&predContext,
+ getter_AddRefs(exprResult));
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ // handle default, [position() == numberValue()]
+ if (exprResult->getResultType() == txAExprResult::NUMBER) {
+ if ((double)predContext.position() == exprResult->numberValue()) {
+ nodes->mark(index);
+ }
+ }
+ else if (exprResult->booleanValue()) {
+ nodes->mark(index);
+ }
+ ++index;
+ }
+ // sweep the non-marked nodes
+ nodes->sweep();
+ }
+
+ return NS_OK;
+}
+
+bool
+PredicateList::isSensitiveTo(Expr::ContextSensitivity aContext)
+{
+ // We're creating a new node/nodeset so we can ignore those bits.
+ Expr::ContextSensitivity context =
+ aContext & ~(Expr::NODE_CONTEXT | Expr::NODESET_CONTEXT);
+ if (context == Expr::NO_CONTEXT) {
+ return false;
+ }
+
+ uint32_t i, len = mPredicates.Length();
+ for (i = 0; i < len; ++i) {
+ if (mPredicates[i]->isSensitiveTo(context)) {
+ return true;
+ }
+ }
+
+ return false;
+}
+
+#ifdef TX_TO_STRING
+void PredicateList::toString(nsAString& dest)
+{
+ for (uint32_t i = 0; i < mPredicates.Length(); ++i) {
+ dest.Append(char16_t('['));
+ mPredicates[i]->toString(dest);
+ dest.Append(char16_t(']'));
+ }
+}
+#endif