ppapi: Add support for touch events.

ppapi/cpp/dev/touch_event_dev.cc

+// Copyright (c) 2011 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 "ppapi/cpp/module_impl.h"
+#include "ppapi/cpp/point.h"
+#include "ppapi/cpp/dev/touch_event_dev.h"
+
+namespace pp {
+
+namespace {
+
+template <> const char* interface_name<PPB_TouchInputEvent_Dev>() {
+  return PPB_TOUCH_INPUT_EVENT_DEV_INTERFACE;
+}
+
+}  // namespace
+
+TouchInputEvent_Dev::TouchInputEvent_Dev(const InputEvent& event)
+    : InputEvent() {
+  if (!has_interface<PPB_TouchInputEvent_Dev>())
+    return;
+  // Type check the input event before setting it.
+  if (get_interface<PPB_TouchInputEvent_Dev>()->IsTouchInputEvent(
+      event.pp_resource())) {
+    Module::Get()->core()->AddRefResource(event.pp_resource());
+    PassRefFromConstructor(event.pp_resource());
+  }
+}
+
+uint32_t TouchInputEvent_Dev::GetTouchCount(PP_TouchListType list) const {
+  if (!has_interface<PPB_TouchInputEvent_Dev>())
+    return 0;
+  return get_interface<PPB_TouchInputEvent_Dev>()->GetTouchCount(pp_resource(),
+                                                                 list);
+}
+
+TouchPoint_Dev TouchInputEvent_Dev::GetTouchById(PP_TouchListType list,
+                                                 uint32_t id) const {
+  if (!has_interface<PPB_TouchInputEvent_Dev>())
+    return TouchPoint_Dev();
+  return TouchPoint_Dev(get_interface<PPB_TouchInputEvent_Dev>()->
+                        GetTouchById(pp_resource(), list, id));
+}
+
+TouchPoint_Dev TouchInputEvent_Dev::GetTouchByIndex(PP_TouchListType list,
+                                                    uint32_t index) const {
+  if (!has_interface<PPB_TouchInputEvent_Dev>())
+    return TouchPoint_Dev();
+  return TouchPoint_Dev(get_interface<PPB_TouchInputEvent_Dev>()->
+                        GetTouchByIndex(pp_resource(), list, index));
+}
+
+}  // namespace pp