Clipboard API mixes representations of an item with distinct items. about clipboard-apis HOT 3 OPEN

Proposal: https://docs.google.com/document/d/1sMcajoYAQ_M_VOIn1RLokG1sVB7skjoeviqt9aZOcDk/edit

from clipboard-apis.

There is no way to specify that an item has multiple flavors/representations on the clipboard. mozGetDataAt and mozSetDataAt got this correct with an index that was in common across the flavors of a given item. This is also reflective of the native clipboard API. Adding a series of flavors to the clipboard as individual items of a DataTransfer object doesn't help the receiver determine if they're a flavor or unique item. Electron has a similar problem with only support for single item, multiple flavors.

Examples:
items: foo.png foo.jpg <- single item, two flavors
items: foo.png bar.jpg <- multiple items, two unique items
items: foo.png foo.jpg, bar.png bar.jpg <- multiple items, two flavors of the each item

In the DataTransfer item list, and index is needed to collect items.
item[0] item[1]
index: 0 index: 0 <- this is what is missing
name: foo.png name: foo.jpg <- flavors of same content
blob/file blob/file

from clipboard-apis.

Right. We need a better API which differentiates the flavor/representation of an item in the native clipboard from distinct entires/items in them.

from clipboard-apis.