534833 - click event is occasionally lost in text form controls when focus event changes the value of the control.

Status: RESOLVED FIXED

(Core :: DOM: UI Events & Focus Handling, defect)

Description

[iwill]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9.1.5) Gecko/20091102 Firefox/3.5.5
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9.1.5) Gecko/20091102 Firefox/3.5.5

I bind two events focus and click to a text input, focus to change the value of the input, and click to do something else. 
At the beginning, the input has not been focused, and the value of it is "test |", then click on the input. If cilck after after the "|", the click event will be triggered, but if click before the "|", the click event will NOT be triggered. 
I used the JQuery-1.3.2.js library, I consider it is a bug of the Firefox, because it does not occur in any other browsers except Firefox. 

Reproducible: Always

Steps to Reproduce:
I will attach my demo, open with Firefox(I have tested with Firefox-3.5.5 and 2.0.0.20). 
1.Click anywhere first to make sure the input has not been focused; 
2.Click on the input AFTER the "|", then you will get "click" and "focus"; 
3.Repeat step 1; 
4.Click on the input BEFORE the "|", then you will get "focus" only; 
5.Repeat steps 1 - 4 with any other browser, e.g. Oprea-10.10, Chrome-3.0.195.33, IE-8, the bug will not be occurred; 
Actual Results:  
The behavior in Firefox is very strange, and different form the other browsers. 

Expected Results:  
Get "click" and "focus" always. 

JQuery-1.3.2.js

Comment 1

[iwill]

Attachment: a simple demo

Comment 2

[iwill]

JQuery
http://jquery.com/

Comment 3

[iwill]

Any one here?

Comment 4

[Olli Pettay [:smaug][[e-mail]]]

Attachment: testcase without jQuery

Interesting. I haven't seen this bug filed before, but I assume the problem
has been there forever.

Comment 5

[Olli Pettay [:smaug][[e-mail]]]

The problem is probably that when clicking the text, textframe gets mousedown
then focus removes or modified the textframe and mouseup goes to the anonymous
div inside <input>. Or perhaps mousedown goes to anon div, but mouseup to
<input> element.
I'll debug this.

Comment 6

[iwill]

Attachment: "mousedown", "focus", "mouseup", but no "click"

Comment 7

[iwill]

(In reply to comment #5)

I have tested again, and I found all the events were triggered except "click". 
Click after the "|": mousedown > focus > mouseup > click; 
Click before the "|": mousedown > focus > mouseup.

Comment 8

[iwill]

Attachment: use this but not the prev one

Once I commit, I can not update anything anymore :(

Comment 9

[Olli Pettay [:smaug][[e-mail]]]

I have the patch for this. I just need to mochitestify my testcases.

Comment 10

[Olli Pettay [:smaug][[e-mail]]]

Attachment: patch

For native anonymous content, generate click, even if the target has changed
from #text to anonymous div.
We don't want that behavior always, since generally that is not what 
browsers seem to do.

Posted the patch to tryserver.

Comment 11

[Olli Pettay [:smaug][[e-mail]]]

http://hg.mozilla.org/mozilla-central/rev/5412edab7497