1327835 - Drag-selection (drag-selecting text) inconsistently scrolls scrollable area (if selection started outside of that area)

Status: NEW

(Core :: DOM: Selection, defect, P5)

Description

[arni2033]

>>>   My Info:   Win7_64, Nightly 49, 32bit, ID 20160526082509
STR_1:
1. Open bug 1257815, scroll "CC list" to the bottom
2. Move mouse over text "(never email me about this bug)" on the page, hold left mouse button.
3. Move mouse by to the top of CC list to place it over the top border of CC list.
4.(bonus) Move mouse pointer by ~5px above CC list

AR:
 Step 3 - CC list scrolls a bit to the top as I move mouse, but then stops, when mouse movements stop.
 Step 4 - CC list doesn't move.


STR_2:
1. Open bug 1257815, apply style   #cc_edit_area_showhide_container>ul{width:100px}
2. Move mouse over text "(never email me about this bug)" on the page, hold left mouse button.
3. Move mouse by ~35px to the top, to place mouse over horizontal scrollbar. Stop any mouse movements.
4.(bonus) Move mouse to the top of CC list, then move mouse pointer ~5px above CC list

AR:
 Step 3 - CC list scrolls to the bottom as I move mouse, but then stops, when mouse movements stop.
 Step 4 - CC list scrolls a bit to the top, but then stops, when mouse movements stop.


ER:  Either X or Y.  X is better
 X) CC list shouldn't scroll, because I started selection outside of scrollable element.
 Y) CC list should scroll in a normal way, as if I started text selection inside the CC list.
    
    If you're unaware, what is "a normal way" of scrolling during text selection in FF, here it is:
  STR_1 Step 3 - CC list should continue scrolling to the top when I stop mouse movements.
  STR_1 Step 4 - CC list should scroll to the top.
  STR_2 Step 3 - CC list should continue scrolling to the bottom when I stop mouse movements.
  STR_2 Step 4 - CC list should scroll to the top.

Comment 1

[Jens Stutte [:jstutte]]

Bulk-downgrade of unassigned, untouched DOM/Storage bug's priority.

If you have reason to believe, this is wrong, please write a comment and ni :jstutte.