232405 - textbox/textarea doesn't scroll if I change cursor position with setSelectionRange, selectionStart, etc.

Status: RESOLVED FIXED

(Core :: DOM: Editor, defect)

Description

[alexander :surkov (:asurkov)]

User-Agent:       
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.6) Gecko/20040113

If I change cursor position in html:input by setSelectionRange() method or by
properties selectionStart and selectionEnd then text isn't scrolled on new
cursor position. 
How can I manage visible text range in this case?

Reproducible: Always
Steps to Reproduce:

Comment 1

[alexander :surkov (:asurkov)]

Attachment: testcase

Comment 2

[Boris Zbarsky [:bzbarsky]]

Editor.

Comment 3

[Jesse Ruderman]

This is annoying when using the "Valid XHTML" user script at http://www.squarefree.com/userscripts/valid-xhtml.user.js, because it makes it difficult to see where the error is.  The script is able to select the error but is not able to scroll the textarea to make the error visible.

It might be possible for JavaScript code to work around this bug by setting scrollTop (as in the workarounds for the controversial bug 231389), but that would be hard because I don't know exactly how tall each line of the textarea is.

Comment 4

[Jesse Ruderman]

Attachment: another testcase

This has tests for setting the selection/caret position both before and after focusing the textarea.  The "before" cases might be bug 353539 rather than this bug.

Comment 5

[Dave Cook]

Bug 231389 has a solution for this problem.

Comment 7

[(no longer active)]

My patch in bug 231389 fixes this problem.

Comment 8

[Firefox Bug Husbandry Bot]

https://bugzilla.mozilla.org/show_bug.cgi?id=1527381

Comment 9

[Firefox Bug Husbandry Bot]

https://bugzilla.mozilla.org/show_bug.cgi?id=1527381