ppapi: Add support for touch events.

ppapi/thunk/ppb_input_event_thunk.cc

Index: ppapi/thunk/ppb_input_event_thunk.cc
diff --git a/ppapi/thunk/ppb_input_event_thunk.cc b/ppapi/thunk/ppb_input_event_thunk.cc
index 47f9e51f325f3387fc5372f6d523a8b77fccbeaa..b6a76d0f715945a321178779b5c4db455d958280 100644
--- a/ppapi/thunk/ppb_input_event_thunk.cc
+++ b/ppapi/thunk/ppb_input_event_thunk.cc
@@ -379,6 +379,52 @@ const PPB_IMEInputEvent_Dev_0_2 g_ppb_ime_input_event_0_2_thunk = {
   &GetIMESelection
 };
 
+// Touch -----------------------------------------------------------------------
+
+PP_Bool IsTouchInputEvent(PP_Resource resource) {
+  if (!IsInputEvent(resource))
+    return PP_FALSE;  // Prevent warning log in GetType.
+  PP_InputEvent_Type type = GetType(resource);
+  return PP_FromBool(type == PP_INPUTEVENT_TYPE_TOUCHSTART ||
+                     type == PP_INPUTEVENT_TYPE_TOUCHMOVE ||
+                     type == PP_INPUTEVENT_TYPE_TOUCHEND ||
+                     type == PP_INPUTEVENT_TYPE_TOUCHCANCEL);
+}
+
+uint32_t GetTouchCount(PP_Resource touch_event, PP_TouchListType list) {
+  EnterInputEvent enter(touch_event, true);
+  if (enter.failed())
+    return 0;
+  return enter.object()->GetTouchCount(list);
+}
+
+struct PP_TouchPoint_Dev GetTouchByIndex(PP_Resource touch_event,
+                                         PP_TouchListType list,
+                                         uint32_t index) {
+  EnterInputEvent enter(touch_event, true);
+  if (enter.failed()) {

[brettw, 2012/06/19 21:20:52]

No {}. Same on the next fn.

[sadrul, 2012/06/20 20:19:03]

Done.

+    return PP_MakeTouchPoint();
+  }
+  return enter.object()->GetTouchByIndex(list, index);
+}
+
+struct PP_TouchPoint_Dev GetTouchById(PP_Resource touch_event,
+                                      PP_TouchListType list,
+                                      uint32_t id) {
+  EnterInputEvent enter(touch_event, true);
+  if (enter.failed()) {
+    return PP_MakeTouchPoint();
+  }
+  return enter.object()->GetTouchById(list, id);
+}
+
+const PPB_TouchInputEvent_Dev g_ppb_touch_input_event_thunk = {
+  &IsTouchInputEvent,
+  &GetTouchCount,
+  &GetTouchByIndex,
+  &GetTouchById
+};
+
 }  // namespace
 
 const PPB_InputEvent_1_0* GetPPB_InputEvent_1_0_Thunk() {
@@ -414,5 +460,9 @@ const PPB_IMEInputEvent_Dev_0_2* GetPPB_IMEInputEvent_Dev_0_2_Thunk() {
   return &g_ppb_ime_input_event_0_2_thunk;
 }
 
+const PPB_TouchInputEvent_Dev* GetPPB_TouchInputEvent_Thunk() {
+  return &g_ppb_touch_input_event_thunk;
+}
+
 }  // namespace thunk
 }  // namespace ppapi