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| 1 | +module DOM.HTML.Event.DataTransfer |
| 2 | + ( DataTransfer |
| 3 | + , files |
| 4 | + , filesNullable |
| 5 | + , types |
| 6 | + , getData |
| 7 | + , setData |
| 8 | + ) where |
| 9 | + |
| 10 | +import Prelude |
| 11 | +import Control.Monad.Eff (Eff) |
| 12 | +import DOM (DOM) |
| 13 | +import DOM.File.Types (FileList) |
| 14 | +import Data.Maybe (Maybe) |
| 15 | +import Data.MediaType (MediaType(..)) |
| 16 | +import Data.Nullable (Nullable, toMaybe) |
| 17 | + |
| 18 | +foreign import data DataTransfer :: * |
| 19 | + |
| 20 | +-- | Contains a list of all the local files available on the data transfer. |
| 21 | +-- | Empty if the drag operation doesn't involve dragging files. |
| 22 | +-- | |
| 23 | +-- | It's possible that a drag operation may have null files, instead of an |
| 24 | +-- | empty file list. In these cases Nothing is returned. |
| 25 | +files :: DataTransfer -> Maybe FileList |
| 26 | +files = toMaybe <$> filesNullable |
| 27 | + |
| 28 | +foreign import filesNullable :: DataTransfer -> Nullable FileList |
| 29 | + |
| 30 | +-- | Returns an array of data formats used in the drag operation. |
| 31 | +-- | If the drag operation included no data, then the array is empty. |
| 32 | +foreign import types :: DataTransfer -> Array String |
| 33 | + |
| 34 | +foreign import getDataImpl |
| 35 | + :: forall eff |
| 36 | + . String |
| 37 | + -> DataTransfer |
| 38 | + -> Eff (dom :: DOM | eff) String |
| 39 | + |
| 40 | +-- | Retrieves the data for a given media type, or an empty string if data for |
| 41 | +-- | that type does not exist or the data transfer object contains no data. |
| 42 | +getData |
| 43 | + :: forall eff. MediaType -> DataTransfer -> Eff (dom :: DOM | eff) String |
| 44 | +getData (MediaType format) dt = getDataImpl format dt |
| 45 | + |
| 46 | +foreign import setDataImpl |
| 47 | + :: forall eff |
| 48 | + . String |
| 49 | + -> String |
| 50 | + -> DataTransfer |
| 51 | + -> Eff (dom :: DOM | eff) Unit |
| 52 | + |
| 53 | +-- | Sets the data transfer object's data for a given media format. |
| 54 | +-- | |
| 55 | +-- | Example: |
| 56 | +-- | |
| 57 | +-- | setData textPlain "Foo" dataTransfer |
| 58 | +setData |
| 59 | + :: forall eff |
| 60 | + . MediaType |
| 61 | + -> String |
| 62 | + -> DataTransfer |
| 63 | + -> Eff (dom :: DOM | eff) Unit |
| 64 | +setData (MediaType format) dat dt = setDataImpl format dat dt |
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