Notification is displayed too late.

[Jakub Ś]

Steps to reproduce

1. Drop large file into editor e.g. 30MB image
2. Observe

Expected result

CKEditor should display notification once file is dropped.

It would be perfect if this was something like "Preparing file for upload" but from what I have talked with my colleague, it will be easier to just display "Upload 0%"

Actual result

CKEditor displays notification once it receives information about package size (file size with headers, control sums etc. which is greater than sole file size).

For few seconds there is no information and CKEditor is not responding. This can make users think that editor has hung and not that it is processing the file.

Other details (browser, OS, CKEditor version, installed plugins)

This behaviour has been introduced in CKEditor 4.5.4. In CKEditor 4.5.3 we were using file size (smaller than whole package size) thus notification was displayed at once. In CKEditor we display real upload size but we get that information only after first progress event is fired.