Mozart: Add helpers for building view associates.

mojo/ui/associates/resolved_hits.cc

Index: mojo/ui/associates/resolved_hits.cc
diff --git a/mojo/ui/associates/resolved_hits.cc b/mojo/ui/associates/resolved_hits.cc
new file mode 100644
index 0000000000000000000000000000000000000000..926ccad58a8ee89184b86050cf8771b706fc9edc
--- /dev/null
+++ b/mojo/ui/associates/resolved_hits.cc
@@ -0,0 +1,56 @@
+// Copyright 2016 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 "mojo/ui/associates/resolved_hits.h"
+
+#include "base/bind.h"
+#include "base/logging.h"
+#include "mojo/services/gfx/composition/cpp/formatting.h"
+#include "mojo/services/ui/views/cpp/formatting.h"
+
+namespace mojo {
+namespace ui {
+
+ResolvedHits::ResolvedHits(mojo::gfx::composition::HitTestResultPtr result)
+    : result_(result.Pass()) {
+  DCHECK(result_);
+}
+
+ResolvedHits::~ResolvedHits() {}
+
+void ResolvedHits::AddMapping(uint32_t scene_token_value,
+                              mojo::ui::ViewTokenPtr view_token) {
+  DCHECK(scene_token_value);
+  DCHECK(view_token);
+
+  auto pair = map_.emplace(scene_token_value, view_token.Pass());
+  DCHECK(pair.second);
+}
+
+std::ostream& operator<<(std::ostream& os,
+                         const mojo::ui::ResolvedHits& value) {
+  os << "{result=";
+  if (value.result())
+    os << *value.result();
+  else
+    os << "null";
+  os << ", map={";
+  bool first = true;
+  for (const auto& pair : value.map()) {
+    if (first)
+      first = false;
+    else
+      os << ", ";
+    os << pair.first << ": " << pair.second;
+  }
+  return os << "}}";
+}
+
+std::ostream& operator<<(std::ostream& os,
+                         const mojo::ui::ResolvedHits* value) {
+  return value ? os << *value : os << "null";
+}
+
+}  // namespace ui
+}  // namespace mojo