1065842 - caret becomes invisible and hangs at it's place when stepping through mathematical formula with arrowright key

Status: NEW

(SeaMonkey :: Composer, defect)

Description

[Johannes Leushuis]

User Agent: Mozilla/5.0 (Windows NT 5.1; rv:32.0) Gecko/20100101 Firefox/32.0 SeaMonkey/2.29
Build ID: 20140904220358

Steps to reproduce:

caret disappears in text containing mathematical formulas


Actual results:

in Composer
add the text 'hello'
with Insert, Mathematical formula... insert '\sqrt{x_1}'
add the text 'hoi'
moving the caret over 'hello' in the editor, the caret shows
moving the caret over \sqrt{x_1}, the caret shows
entering the caret in 'hoi', the caret disappears

entering from the other side gives also wrong results




Expected results:

the caret should stay visible when the caret enters the text 'hoi'

Comment 1

[Rainer Bielefeld]

Attachment: Sample document.html

REPRODUCIBLE with unofficial (from <http://seamonkey.callek.net/contrib/>)  en-US SeaMonkey 2.44a1  Mozilla/5.0 (Windows NT 6.1; x64; rv:47.0)  Gecko/20100101 Firefox/47.0 Build 20160208090255  (Default Classic Theme)  on German WIN7 64bit:

0. download sample document → Launch Composer from Browser via composer icon 
   in Status Bar
1. Menu 'File  → Open →  sample document'
   » caret flashes at the right end of contents
2. Mouxe click into "xxx"
   » caret flashes somewhere in "xxx"
3. [arrowright] on key board several times to move caret to the right
   » every key press moves caret 1 character to the right, also in formula
   Bug: last visible caret position is right from "1", next [arrowright]
        will make caret invisible.

Comment 2

[Rainer Bielefeld]

There are some additional strange move-carret-effects, I will do additional research later.

Also REPRODUCIBLE with  English SeaMonkey 2.44a1  (X11; Linux x86_64; rv:47.0)  Gecko/20100101 Firefox/47.0 Build 20160208023510   (Default Theme) on VirtualBox Ubuntu 14.04 LTS

Comment 3

[Rainer Bielefeld]

Possibly related:
"Bug 987028 - Cursor keys in not visible inside nsMathMLChar operators"
"Bug 565185 - Caret dissapears in a contenteditable=true div with nested mathml formula in it"

Comment 4

[Rainer Bielefeld]

My test results with older SeaMonkey Versions (WINDOWS) and sample document

a) 2.33.1: Insert Math AVAILABLE. LaTeX formula in sample document 
        shown correctly
        Caret problem DOES EXIST
b) 2.26.1: No Insert Math available. LaTeX formula in sample document 
        shown correctly.
        Caret problem DOES EXIST
c) 2.16: No Insert Math available. LaTeX formula in sample document 
        shown correctly
        No caret problem
d) 2.5:  No Insert Math available. LaTeX formula in sample document 
        shown correctly.
        No caret problem
e)2.0:  No Insert Math available. Latex formula in sample document NOT 
        shown correctly, LaTeX source code shown.
        No caret problem (of course)

f) Conclusion (b,c): Problem appeared somewhen between 2.16 and 2.26.1
g) Conclusion (a,b): Problem is not related to Insert Math Dialog

Comment 5

[Rainer Bielefeld]

h) also REPRODUCIBLE with TB 47.0a1 (2016-02-09)
i) Caret does ont really vanish, but becomes invisible a it's place:
   In step 3 immediately after the caret becomes invisible type "qwertzuiop" with
   a rightarrow after each charakter.
   source snippet before: 
           <annotation encoding="TeX">\sqrt{x_1}</annotation>
   after:  <annotation encoding="TeX">qwertzuiop\sqrt{x_1}</annotation>

There are lots of similar problems in composer and also in browser with cursor navigation (F7), I haven't a clue how to find the best entrance for fixing this because it's not clear whether thy really have the same roots (Bug 565185 already was in rv:1.9.3a5pre) Gecko/20100511 Minefield/3.7a5pre ...)

NEW for now because other