Add TextMatchMarkerList in preparation for DocumentMarkerController refactor

third_party/WebKit/Source/core/editing/markers/TextMatchMarker.cpp

Index: third_party/WebKit/Source/core/editing/markers/TextMatchMarker.cpp
diff --git a/third_party/WebKit/Source/core/editing/markers/TextMatchMarker.cpp b/third_party/WebKit/Source/core/editing/markers/TextMatchMarker.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..edb82e3a629763da8484e60d40a229e451349987
--- /dev/null
+++ b/third_party/WebKit/Source/core/editing/markers/TextMatchMarker.cpp
@@ -0,0 +1,46 @@
+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "core/editing/markers/TextMatchMarker.h"
+
+#include "core/dom/Range.h"
+
+namespace blink {
+
+TextMatchMarker::TextMatchMarker(unsigned startOffset,
+                                 unsigned endOffset,
+                                 bool activeMatch)
+    : DocumentMarker(startOffset, endOffset, activeMatch),
+      m_state(State::Invalid) {}
+
+TextMatchMarker* TextMatchMarker::clone() const {
+  return new TextMatchMarker(*this);
+}
+
+void TextMatchMarker::updateRenderedRectIfNeeded(const Node& node) {
+  if (!isValid())
+    updateRenderedRect(node);
+}
+
+void TextMatchMarker::updateRenderedRect(const Node& node) {
+  Range* range = Range::create(node.document());
+  // The offsets of the marker may be out-dated, so check for exceptions.
+  DummyExceptionStateForTesting exceptionState;
+  range->setStart(&const_cast<Node&>(node), startOffset(), exceptionState);
+  if (!exceptionState.hadException()) {
+    range->setEnd(&const_cast<Node&>(node), endOffset(),
+                  IGNORE_EXCEPTION_FOR_TESTING);
+  }
+
+  if (!exceptionState.hadException()) {
+    // TODO(yosin): Once we have a |EphemeralRange| version of
+    // |boundingBox()|, we should use it instead of |Range| version.
+    setRenderedRect(LayoutRect(range->boundingBox()));
+  } else {
+    nullifyRenderedRect();
+  }
+  range->dispose();
+}
+
+}  // namespace blink