Cocoa: Implement Drag-and-Drop.

Implement drag and drop support for drags originating
from outside Qt. Port mime and pasteboard code from
Qt 4. Use QSimpleDrag from from platform support to
implement internal Qt drags.

Change-Id: I5b664a95ebb00f48de2bd21c24dfb579af16123e
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>

1 files changed, 58 insertions, 0 deletions

diff --git a/src/plugins/platforms/cocoa/qcocoahelpers.mm b/src/plugins/platforms/cocoa/qcocoahelpers.mm
index 29c505e1ab..ec4399b66c 100644
--- a/src/plugins/platforms/cocoa/qcocoahelpers.mm
+++ b/src/plugins/platforms/cocoa/qcocoahelpers.mm
@@ -270,6 +270,64 @@ Qt::Key qt_mac_cocoaKey2QtKey(QChar keyCode)
     return i->qtKey;
 }
 
+struct dndenum_mapper
+{
+    NSDragOperation mac_code;
+    Qt::DropAction qt_code;
+    bool Qt2Mac;
+};
+
+static dndenum_mapper dnd_enums[] = {
+    { NSDragOperationLink,  Qt::LinkAction, true },
+    { NSDragOperationMove,  Qt::MoveAction, true },
+    { NSDragOperationCopy,  Qt::CopyAction, true },
+    { NSDragOperationGeneric,  Qt::CopyAction, false },
+    { NSDragOperationEvery, Qt::ActionMask, false },
+    { NSDragOperationNone, Qt::IgnoreAction, false }
+};
+
+NSDragOperation qt_mac_mapDropAction(Qt::DropAction action)
+{
+    for (int i=0; dnd_enums[i].qt_code; i++) {
+        if (dnd_enums[i].Qt2Mac && (action & dnd_enums[i].qt_code)) {
+            return dnd_enums[i].mac_code;
+        }
+    }
+    return NSDragOperationNone;
+}
+
+NSDragOperation qt_mac_mapDropActions(Qt::DropActions actions)
+{
+    NSDragOperation nsActions = NSDragOperationNone;
+    for (int i=0; dnd_enums[i].qt_code; i++) {
+        if (dnd_enums[i].Qt2Mac && (actions & dnd_enums[i].qt_code))
+            nsActions |= dnd_enums[i].mac_code;
+    }
+    return nsActions;
+}
+
+Qt::DropAction qt_mac_mapNSDragOperation(NSDragOperation nsActions)
+{
+    Qt::DropAction action = Qt::IgnoreAction;
+    for (int i=0; dnd_enums[i].mac_code; i++) {
+        if (nsActions & dnd_enums[i].mac_code)
+            return dnd_enums[i].qt_code;
+    }
+    return action;
+}
+
+Qt::DropActions qt_mac_mapNSDragOperations(NSDragOperation nsActions)
+{
+    Qt::DropActions actions = Qt::IgnoreAction;
+    for (int i=0; dnd_enums[i].mac_code; i++) {
+        if (nsActions & dnd_enums[i].mac_code)
+            actions |= dnd_enums[i].qt_code;
+    }
+    return actions;
+}
+
+
+
 //
 // Misc
 //