1 files changed, 135 insertions, 7 deletions

diff --git a/indra/llwindow/llwindowmacosx.cpp b/indra/llwindow/llwindowmacosx.cpp
index ed62faece6..ffc44a1e84 100644
--- a/indra/llwindow/llwindowmacosx.cpp
+++ b/indra/llwindow/llwindowmacosx.cpp
@@ -499,8 +499,9 @@ BOOL LLWindowMacOSX::createContext(int x, int y, int width, int height, int bits
 
 		// Set up window event handlers (some window-related events ONLY go to window handlers.)
 		InstallStandardEventHandler(GetWindowEventTarget(mWindow));
-		InstallWindowEventHandler (mWindow, mEventHandlerUPP, GetEventTypeCount (WindowHandlerEventList), WindowHandlerEventList, (void*)this, &mWindowHandlerRef); // add event handler
-
+		InstallWindowEventHandler(mWindow, mEventHandlerUPP, GetEventTypeCount (WindowHandlerEventList), WindowHandlerEventList, (void*)this, &mWindowHandlerRef); // add event handler
+		InstallTrackingHandler( dragTrackingHandler, mWindow, (void*)this );		
+		InstallReceiveHandler( dragReceiveHandler, mWindow, (void*)this );
 	}
 
 	{
@@ -2174,11 +2175,8 @@ OSStatus LLWindowMacOSX::eventHandler (EventHandlerCallRef myHandler, EventRef e
 						}
 						else
 						{
-							MASK mask = 0;
-							if(modifiers & shiftKey) { mask |= MASK_SHIFT; }
-							if(modifiers & (cmdKey | controlKey)) { mask |= MASK_CONTROL; }
-							if(modifiers & optionKey) { mask |= MASK_ALT; }
-
+							MASK mask = LLWindowMacOSX::modifiersToMask(modifiers);
+							
 							llassert( actualType == typeUnicodeText );
 
 							// The result is a UTF16 buffer.  Pass the characters in turn to handleUnicodeChar.
@@ -3379,3 +3377,133 @@ std::vector<std::string> LLWindowMacOSX::getDynamicFallbackFontList()
 	return std::vector<std::string>();
 }
 
+// static
+MASK LLWindowMacOSX::modifiersToMask(SInt16 modifiers)
+{
+	MASK mask = 0;
+	if(modifiers & shiftKey) { mask |= MASK_SHIFT; }
+	if(modifiers & (cmdKey | controlKey)) { mask |= MASK_CONTROL; }
+	if(modifiers & optionKey) { mask |= MASK_ALT; }
+	return mask;
+}	
+
+OSErr LLWindowMacOSX::dragTrackingHandler(DragTrackingMessage message, WindowRef theWindow,
+						  void * handlerRefCon, DragRef drag)
+{
+	OSErr result = noErr;
+	LLWindowMacOSX *self = (LLWindowMacOSX*)handlerRefCon;
+
+	lldebugs << "drag tracking handler, message = " << message << llendl;
+	
+	switch(message)
+	{
+		case kDragTrackingInWindow:
+			result = self->handleDragNDrop(drag, LLWindowCallbacks::DNDA_TRACK);
+		break;
+		
+		case kDragTrackingEnterHandler:
+			result = self->handleDragNDrop(drag, LLWindowCallbacks::DNDA_START_TRACKING);
+		break;
+		
+		case kDragTrackingLeaveHandler:
+			result = self->handleDragNDrop(drag, LLWindowCallbacks::DNDA_STOP_TRACKING);
+		break;
+		
+		default:
+		break;
+	}
+	
+	return result;
+}
+
+OSErr LLWindowMacOSX::dragReceiveHandler(WindowRef theWindow, void * handlerRefCon,	
+										 DragRef drag)
+{	
+	LLWindowMacOSX *self = (LLWindowMacOSX*)handlerRefCon;
+	return self->handleDragNDrop(drag, LLWindowCallbacks::DNDA_DROPPED);
+
+}
+
+OSErr LLWindowMacOSX::handleDragNDrop(DragRef drag, LLWindowCallbacks::DragNDropAction action)
+{	
+	OSErr result = dragNotAcceptedErr;	// overall function result
+	OSErr err = noErr;	// for local error handling
+	
+	// Get the mouse position and modifiers of this drag.
+	SInt16 modifiers, mouseDownModifiers, mouseUpModifiers;
+	::GetDragModifiers(drag, &modifiers, &mouseDownModifiers, &mouseUpModifiers);
+	MASK mask = LLWindowMacOSX::modifiersToMask(modifiers);
+	
+	Point mouse_point;
+	// This will return the mouse point in global screen coords
+	::GetDragMouse(drag, &mouse_point, NULL);
+	LLCoordScreen screen_coords(mouse_point.h, mouse_point.v);
+	LLCoordGL gl_pos;
+	convertCoords(screen_coords, &gl_pos);
+	
+	// Look at the pasteboard and try to extract an URL from it
+	PasteboardRef   pasteboard;
+	if(GetDragPasteboard(drag, &pasteboard) == noErr)
+	{
+		ItemCount num_items = 0;
+		// Treat an error here as an item count of 0
+		(void)PasteboardGetItemCount(pasteboard, &num_items);
+		
+		// Only deal with single-item drags.
+		if(num_items == 1)
+		{
+			PasteboardItemID item_id = NULL;
+			CFArrayRef flavors = NULL;
+			CFDataRef data = NULL;
+			
+			err = PasteboardGetItemIdentifier(pasteboard, 1, &item_id); // Yes, this really is 1-based.
+			
+			// Try to extract an URL from the pasteboard
+			if(err == noErr)
+			{
+				err = PasteboardCopyItemFlavors( pasteboard, item_id, &flavors);
+			}
+			
+			if(err == noErr)
+			{
+				if(CFArrayContainsValue(flavors, CFRangeMake(0, CFArrayGetCount(flavors)), kUTTypeURL))
+				{
+					// This is an URL.
+					err = PasteboardCopyItemFlavorData(pasteboard, item_id, kUTTypeURL, &data);
+				}
+				else if(CFArrayContainsValue(flavors, CFRangeMake(0, CFArrayGetCount(flavors)), kUTTypeUTF8PlainText))
+				{
+					// This is a string that might be an URL.
+					err = PasteboardCopyItemFlavorData(pasteboard, item_id, kUTTypeUTF8PlainText, &data);
+				}
+				
+			}
+			
+			if(flavors != NULL)
+			{
+				CFRelease(flavors);
+			}
+
+			if(data != NULL)
+			{
+				std::string url;
+				url.assign((char*)CFDataGetBytePtr(data), CFDataGetLength(data));
+				CFRelease(data);
+				
+				if(!url.empty())
+				{
+					LLWindowCallbacks::DragNDropResult res = 
+						mCallbacks->handleDragNDrop(this, gl_pos, mask, action, url);
+					
+					if (LLWindowCallbacks::DND_NONE != res)
+					{
+						result = noErr;
+					}
+				}
+			}
+		}
+	}
+	
+	return result;
+}
+