1328055 - Small blue areas stay after text selection

Status: NEW

(Core :: Layout: Text and Fonts, defect, P3)

Description

[arni2033]

>>>   My Info:   Win7_64, Nightly 49, 32bit, ID 20160526082509
STR_1:
1. Open http://eadaily.com/ru/news/2016/05/23/kak-i-zachem-rossiya-soderzhit-belorussiyu
2. Move mouse between strings "����������� ���" and "�������� �" on the page, hold left mouse button,
   move mouse between strings "��������������, � ���" and "�� ������" , release left mouse button
3. Move mouse between strings "��������������, � ����" and "� ������" hold Shift key, then
   hold left mouse button, then slowly (5s) move mouse to the start of text selection   

AR:  There're thin blue rectangles left on the page after strings "�. �� ������" and "���, ����� ���"
ER:  No extra blue rectangles as I finished selecting text. Those are glitches.


STR_2:
1. Download and extract "testcase 1" to a folder with a short file name. Open .htm file in Firefox
 (the same steps as in STR_1)
2. Move mouse between strings "����������� ���" and "�������� �" on the page, hold left mouse button,
   move mouse between strings "��������������, � ���" and "�� ������" , release left mouse button
3. Move mouse between strings "��������������, � ����" and "� ������" hold Shift key, then
   hold left mouse button, then slowly (5s) move mouse to the start of text selection


You can't find regression range using STR_1 because the site gives woff2 files only to Firefox 44+

This is regression from bug 1146754 (presumably). Regrssion range:
> https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=8af276ab8636&tochange=37ddc5e2eb72
(but also I have saved build 829195e67537 long time ago, and it is "good")@ Jonathan Kew (:jfkthame):
It seems that this is a regresion caused by your change. Please have a look.

Comment 1

[Mats Palmgren (inactive)]

It seems the text strings above were garbled by Bugzilla somehow so I'm
not sure what text to select on the page.  Also, STR_2 requires "testcase 1",
can you upload that to Bugzilla please?

Anyway, I tried to follow the STR_1 by selecting some random text,
but it works fine for me (Linux Nightly).

Comment 2

[castiel743]

Attachment: testcase 1 - blue areas stay after text selection.zip

>>>   My Info:   Win7_64, Nightly 49, 32bit, ID 20160526082509
>>>   My Info:   Win7_64, Nightly 53, 32bit, ID 20170107030205 (2017-01-07)
STR_1:
1. Open http://eadaily.com/ru/news/2016/05/23/kak-i-zachem-rossiya-soderzhit-belorussiyu
2. Move mouse between strings "финансовыми стр" and "уктурами у" on the page, hold left mouse button,
   move mouse between strings "производителей, а так" and "же прямое" , release left mouse button
3. Move mouse between strings "производителей, а такж" and "е прямое" hold Shift key, then
   hold left mouse button, then slowly (5s) move mouse to the start of text selection   

AR:  There're thin blue rectangles left on the page after strings "т. По мнению" and "год, тогда как"
ER:  No extra blue rectangles as I finished selecting text. Those are glitches.


STR_2:
1. Download and extract "testcase 1" to a folder with a short file name. Open .htm file in Firefox
 (the same steps as in STR_1)
2. Move mouse between strings "финансовыми стр" and "уктурами у" on the page, hold left mouse button,
   move mouse between strings "производителей, а так" and "же прямое" , release left mouse button
3. Move mouse between strings "производителей, а такж" and "е прямое" hold Shift key, then
   hold left mouse button, then slowly (5s) move mouse to the start of text selection


You can't find regression range using STR_1 because the site gives woff2 files only to Firefox 44+


(I'll add from myself, since I tested Nightly 2017-01-07)
> Anyway, I tried to follow the STR_1 by selecting some random text,
This won't work, but on the site from STR_1, it may work. After selection is finished, in some lines you may see that text selection (blue area) became ~2px longer than while performing selection. It would men that you almost reproduce the bug (around Step 3)

Comment 3

[castiel743]

Attachment: screencast 1 - blue areas stay after text selection.webm

Comment 4

[Xidorn Quan [:xidorn] UTC+10]

This looks like an issue of computing overflow area for collapsed whitespace.