Bug 140193

Summary:	Web Inspector: Cursor & scroll view jump when editing in style sidebar for the first time
Product:	WebKit	Reporter:	Michael Bailey <bugzilla>
Component:	Web Inspector	Assignee:	Jonathan Wells <jonowells>
Status:	RESOLVED WORKSFORME
Severity:	Normal	CC:	graouts, joepeck, jonowells, mattbaker, nvasilyev, timothy, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	528+ (Nightly build)
Hardware:	All
OS:	All

Description Michael Bailey 2015-01-07 12:40:19 PST

Screen recording of this issue in WebKit r178028: http://roguewhaler.net/files/web-inspector-jumping.mov

When editing in the style sidebar for the first time after opening an Inspector, several things may happen:
- The cursor may jump to the beginning of the line.
- The scroll view may jump so that the line being edited is at the top.
- Characters typed may be skipped.

The linked video shows the first two issues occurring. The above may occur when typing or when clicking the checkbox next to a style declaration. Subsequent edits behave correctly.

As far as I can tell, my symptoms are the same as reported in #137467. (However, that bug report mentioned ensuring the Inspector is docked — I can reproduce this issue reliably regardless of whether the Inspector is docked, bottom or right, or in a separate window.)

I can reproduce this consistently in Safari 8.0.2 (10600.2.5) and WebKit r178028, both on OS X 10.10.1 (14B25).

Comment 1 Radar WebKit Bug Importer 2015-01-07 12:40:45 PST

<rdar://problem/19402097>

Comment 2 Jonathan Wells 2015-02-06 17:35:31 PST

I'm having trouble reproducing this. Is anyone else able to?

Comment 3 Timothy Hatcher 2015-03-24 15:48:22 PDT

Please check the latest nightly build.

Comment 4 Michael Bailey 2015-03-24 17:27:50 PDT

I actually can still reproduce it in r181893, but only on certain sites. I’ll see if I can narrow it down into a proper testcase.