39326 - D&D: need a way to distinguish btw source/dest locations

Status: RESOLVED FIXED

(Core :: XUL, defect, P3)

Description

[Kathleen :Brade]

I need a way to distinguish or identify the source location of a drag from the 
drop location.

For example, dropping a link on top of itself in the same browser window 
shouldn't load that link.

Another example:  in editor, we need to know whether to "cut" the selection on 
drag/drop or whether to "copy" the selection.

This is critical for d&d in editor.

Comment 1

[Mike Pinkerton (not reading bugmail)]

annotating as a feature.

is the document enough, or do you need more than that?

Comment 2

[Kathleen :Brade]

This is 4.x parity.

Yes, just having a unique window identifier should be sufficient (for knowing 
source/destination window).  Also, a flag would do the trick too: isSameWindow 
(at least in my case).

Comment 3

[Peter Trudelle]

Mass-moving all M20-M30 XPToolkit bugs to Future

Comment 4

[Simon Fraser [no longer active]]

c'mon, this ain't a feature. Lack of this API prevents us from doing drag and 
drop according to Apple HI specs. It's a bug, and I'm marking it for beta3.

Comment 5

[Mike Pinkerton (not reading bugmail)]

*** Bug 44209 has been marked as a duplicate of this bug. ***

Comment 6

[jlarsen]

Just as a side note it would be handy to not only know the window for source and
destination, but where it was dragged from  (a textarea, a paragraph, what)
possibly the id of that section also??? A bit extronous but not all that complex
for the added benefits.

Comment 7

[Mike Pinkerton (not reading bugmail)]

i'm going to store the document in the drag service. from there you can get the 
window if needed. this will allow us to determine, for example, that you can drag 
from the sidebar into the content area (they are different documents) but you 
can't drag a link from the content area and drop it on the same content area. if 
i just gave the window, we wouldn't be able to distinguish those two cases.

objections? tough ;) 

Comment 8

[Simon Fraser [no longer active]]

Don't you need to store the presShell, or docShell, or some view-related thing? 
You might have two views on the same document, and still want to drag-copy 
between them.

Comment 9

[Mike Pinkerton (not reading bugmail)]

i don't think we even can have two views of the same document, even though that 
was a design goal...in practice i don't think it's possible anymore.

Comment 10

[Kathleen :Brade]

actually, if we are dragging within two views of the same document, I'd think 
that we'd want to always cut (unless the user holds the special key to copy, in 
which case we wouldn't care if they were in the same window or not).

Comment 11

[Mike Pinkerton (not reading bugmail)]

api is there. i did a little in navigatorDD.js to stop loading if url dropped is 
from the same content area and it works...needs to be done correctly to handle 
framesets, though.