421718 - going back to page with textarea makes page look editable (has caret, arrow keys operate caret)

Status: RESOLVED DUPLICATE of bug 421169

(Core :: DOM: Editor, defect)

Description

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

Going back to a page where a textarea was focused puts the page in a semi-editable mode (caret browsing?) where the arrow keys move a caret (which, when it moves offscreen, eventually scrolls the page) rather than scrolling the page.

Steps to reproduce:
 1. load this bug report (and don't make any changes)
 2. click in the "Additional comments" textarea
 3. Hit the "Commit" button
 4. hit the browser's back button
 5. click on the text a little above the textarea
 6. hit the up and down arrow keys

Actual results:
 5. caret appears
 6. pressing up and down arrows moves the caret (and the page scrolls when the caret hits the edge of the screen)

Expected results:
 5. no caret
 6. up and down arrow keys scroll the page

This regressed between Linux nightlies 2008-02-26-04-trunk and 2008-02-27-04-trunk.

Comment 1

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

http://bonsai.mozilla.org/cvsquery.cgi?treeid=default&module=PhoenixTinderbox&branch=HEAD&branchtype=match&dir=&file=&filetype=match&who=&whotype=match&sortby=Date&hours=2&date=explicit&mindate=2008-02-26+02%3A00&maxdate=2008-02-27+05%3A00&cvsroot=%2Fcvsroot

Seems most likely to be bug 394473.

Comment 2

[Chris Pearce [:cpearce (Not reading bugmail)]]

This is a dupe of bug 421169. What's happening here, is that when you click on the "commit" button, it gets focus. When you navigate back to the page, nsEventStateManager::ResetBrowseWithCaret() is called, and this turns on caret visibility if the focused node is editable, and <input>s have their editable flag set (even for type=button), so the caret is made visible. I'm not sure why the caret doesn't show up immediately beside the button, maybe because its last position was in the textarea or something, but the patch for bug 421169 fixes this, so duping.