When the browser reports a drag of items other than files (for example,
text) and then triggers a drop event with no files no error message
should be shown to the user, as in that case there would be no highlight
of the drop zone and no indication that the drop would be valid (except
for the mouse cursor); the error message should be shown only when
the drop event with no files follows a file drag.
Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>
The highlighting was removed in Firefox when the cursor was no longer
moving to handle the behaviour of reporting a file drag and then
providing no files in the drop event. That behaviour (which was only
present in Firefox 48 and 49) is already handled with the "dropnofiles"
callback, so that special handling is no longer needed.
Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>
When a file is dragged from the desktop to the file list the file list
is highlighted, and when the file is finally dropped or the drag
operation is cancelled the highlighting is removed. In some cases, due
to a wrong implementation, a browser may end a file drag with a drop
with no files (for example, when a folder or text is dragged), which
would cause the highlight to not be removed. Now those cases are handled
with the "dropnofiles" callback, which restores the UI and also shows a
message to the user.
The error message is just a generic one, as in some cases it is not even
possible to know whether the problem came from a text drag or a folder
drag, and whether the problem appears or not depends on the browser,
version and even operating system.
Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>
The jQuery Plugin triggers the "dragover" callback when the browser
triggers the "dragover" event and the types in their DataTransfer
include a "Files" item. It also triggers the "drop" callback when the
browser triggers the "drop" event and the list of files in its
DataTransfer is not empty.
Unfortunately some browsers may trigger "dragover" events with a
DataTransfer that includes a "Files" item and then trigger a "drop"
event with an empty list of files. When that happens the actions
performed in the "dragXXX" callbacks could be left hanging if they were
expected to be finished in the "drop" callback (for example, if the drop
zone was highlighted during the drag to be then restored when the file
was finally dropped). This commit adds the "dropnofiles" callback to be
able to handle those situations.
Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>
"disableDropState" was set as the event handler in 8d4e5747f3, but
the duplicated code was accidentally added back in 786e858d23.
Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>
Before any upload is submitted the upload is registered in a list of
known uploads; this is needed to retrieve the upload object at several
points of the upload process. When a chunked upload is submitted first a
directory to upload all the chunks is created and, once that is done,
the chunks are sent; in order to send a chunk the upload object needs to
be retrieved from the list of known uploads.
When all the active uploads were finished the list of known uploads was
cleared. However, an upload is not active until it actually starts
sending the data, so while waiting for the upload directory to be
created the upload is already in the list of known uploads yet not
active. Due to all this, if the active uploads finished while another
pending upload was waiting for the upload directory to be created that
pending upload would be removed from the list of known uploads too, and
once the directory was created and thus the chunks were sent a field of
a null upload object would be accessed thus causing a failure.
Instead of removing all the known uploads at once when the active
uploads finish now each upload is explicitly removed when it finishes.
Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>
