Handling clipboard failure case

When calling the clipboard's GetData,
it checks the offer's MIME type and then requests an offer to receive.

But if the offer is changed to be invalid before receiving the callback,
user will receive null data from the event.
In this case, a fail signal is emitted.

Change-Id: Ia51ec2a823a050bfab72a348899e54ae3626e924
Signed-off-by: Bowon Ryu <bowon.ryu@samsung.com>

diff --git a/dali/internal/clipboard/tizen-wayland/clipboard-impl-ecore-wl.cpp b/dali/internal/clipboard/tizen-wayland/clipboard-impl-ecore-wl.cpp
index a775451..05299f8 100644 (file)
--- a/dali/internal/clipboard/tizen-wayland/clipboard-impl-ecore-wl.cpp
+++ b/dali/internal/clipboard/tizen-wayland/clipboard-impl-ecore-wl.cpp
@@ -290,23 +290,32 @@ struct Clipboard::Impl
       return;
     }
 
-    if(ev->data == nullptr || ev->len < 1)
+    if((ev->data == nullptr || ev->len < 1) && ev->mimetype == nullptr)
     {
       DALI_LOG_ERROR("no selection data.\n");
       return;
     }
 
-    size_t      dataLength = strlen(ev->data);
-    size_t      bufferSize = static_cast<size_t>(ev->len);
     std::string content;
-
-    if(dataLength < bufferSize)
+    if(ev->data == nullptr && ev->mimetype)
     {
-      content.append(ev->data, dataLength);
+      // fail case.
+      DALI_LOG_ERROR("cbhm [%s] data is empty.\n", ev->mimetype);
+      content.append("");
     }
     else
     {
-      content.append(ev->data, bufferSize);
+      size_t dataLength = strlen(ev->data);
+      size_t bufferSize = static_cast<size_t>(ev->len);
+
+      if(dataLength < bufferSize)
+      {
+        content.append(ev->data, dataLength);
+      }
+      else
+      {
+        content.append(ev->data, bufferSize);
+      }
     }
 
     DALI_LOG_RELEASE_INFO("receive data, type:%s, data:%s\n", ev->mimetype, content.c_str());
@@ -332,26 +341,37 @@ struct Clipboard::Impl
           // For safe processing, old offers are considered invalid offers.
           if(offer && offer == ev->offer && mLastOffer == offer)
           {
-            DALI_LOG_RELEASE_INFO("receive data, success signal emit, id:%u, type:%s\n", dataRequestId, mimeType.c_str());
-            mDataReceivedSignal.Emit(dataRequestId, mimeType.c_str(), content.c_str());
+            if(content.empty())
+            {
+              DALI_LOG_RELEASE_INFO("content is empty, id:%u\n", dataRequestId);
+              mDataReceivedSignal.Emit(dataRequestId, "", "");
+            }
+            else
+            {
+              DALI_LOG_RELEASE_INFO("receive data, success signal emit, id:%u, type:%s\n", dataRequestId, mimeType.c_str());
+              mDataReceivedSignal.Emit(dataRequestId, mimeType.c_str(), content.c_str());
+            }
 
             if(mReservedOfferReceives.count(dataRequestId))
             {
-              uint32_t reservedId = mReservedOfferReceives[dataRequestId];
-              if(mDataRequestItems.count(reservedId))
+              if(!content.empty())
               {
-                const auto&      reservedItem  = mDataRequestItems[reservedId];
-                std::string      reservedType  = static_cast<std::string>(reservedItem.first);
-                Ecore_Wl2_Offer* reservedOffer = static_cast<Ecore_Wl2_Offer*>(reservedItem.second);
-
-                if(reservedOffer)
+                uint32_t reservedId = mReservedOfferReceives[dataRequestId];
+                if(mDataRequestItems.count(reservedId))
                 {
-                  Ecore_Wl2_Display* display = ecore_wl2_connected_display_get(NULL);
-                  Ecore_Wl2_Input*   input   = ecore_wl2_input_default_input_get(display);
-
-                  DALI_LOG_RELEASE_INFO("offer_receive, id:%u, request type:%s\n", reservedId, reservedType.c_str());
-                  ecore_wl2_offer_receive(reservedOffer, const_cast<char*>(reservedType.c_str()));
-                  ecore_wl2_display_flush(ecore_wl2_input_display_get(input));
+                  const auto&      reservedItem  = mDataRequestItems[reservedId];
+                  std::string      reservedType  = static_cast<std::string>(reservedItem.first);
+                  Ecore_Wl2_Offer* reservedOffer = static_cast<Ecore_Wl2_Offer*>(reservedItem.second);
+
+                  if(reservedOffer)
+                  {
+                    Ecore_Wl2_Display* display = ecore_wl2_connected_display_get(NULL);
+                    Ecore_Wl2_Input*   input   = ecore_wl2_input_default_input_get(display);
+
+                    DALI_LOG_RELEASE_INFO("offer_receive, id:%u, request type:%s\n", reservedId, reservedType.c_str());
+                    ecore_wl2_offer_receive(reservedOffer, const_cast<char*>(reservedType.c_str()));
+                    ecore_wl2_display_flush(ecore_wl2_input_display_get(input));
+                  }
                 }
               }
               mReservedOfferReceives.erase(dataRequestId);