Issue 526516 in chromium: <textarea> selectionStart always returns 0 in focus event

chro...@googlecode.com

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Aug 30, 2015, 11:36:22 AM8/30/15

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Status: Unconfirmed
Owner: ----
Labels: Cr-Blink Pri-2 Via-Wizard Type-Bug OS-Mac

New issue 526516 by antonio....@gmail.com: <textarea> selectionStart always
returns 0 in focus event
https://code.google.com/p/chromium/issues/detail?id=526516

UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_5)
AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.157 Safari/537.36

Example URL:

Steps to reproduce the problem:
1. Copy the HTML below
2. Write in the <textarea> and move the cursor in the middle of the text
3. Click the button Focus and see that 0 is logged in the console

<textarea id="text"></textarea>
<button onclick="document.getElementById('text').focus();">Focus</button>
<script>
var textarea = document.getElementById('text');
textarea.addEventListener('focus', function (e) {
console.log(textarea.selectionStart);
});
</script>

What is the expected behavior?
The textarea.selectionStart should return the cursor position not zero. In
every other page state it returns the correct value.

P.S.: The problem could also be replicated for the selectionEnd property.

What went wrong?
The console prints 0 because textarea.selectionStart is incorrect.

Does it occur on multiple sites: Yes

Is it a problem with a plugin? No

Did this work before? N/A

Does this work in other browsers? Yes

Chrome version: 44.0.2403.157 Channel: stable
OS Version: OS X 10.9.5
Flash Version: Shockwave Flash 18.0 r0

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chro...@googlecode.com

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Aug 30, 2015, 10:22:26 PM8/30/15

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Updates:
Status: Available
Labels: -Cr-Blink Cr-Blink-Forms Cr-Blink-Forms-Textarea Hotlist-Interop

Comment #1 on issue 526516 by tk...@chromium.org: <textarea> selectionStart

always returns 0 in focus event
https://code.google.com/p/chromium/issues/detail?id=526516

Confirmed.

chro...@googlecode.com

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Nov 10, 2015, 12:34:09 AM11/10/15

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Updates:
Status: Started
Owner: tk...@chromium.org

Comment #2 on issue 526516 by tk...@chromium.org: <textarea> selectionStart

always returns 0 in focus event
https://code.google.com/p/chromium/issues/detail?id=526516

(No comment was entered for this change.)

chro...@googlecode.com

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Nov 10, 2015, 1:57:32 PM11/10/15

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Comment #3 on issue 526516 by bugd...@chromium.org: <textarea>

selectionStart always returns 0 in focus event

chro...@googlecode.com

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Nov 11, 2015, 4:24:21 AM11/11/15

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Comment #4 on issue 526516 by bugd...@chromium.org: <textarea>

selectionStart always returns 0 in focus event

https://code.google.com/p/chromium/issues/detail?id=526516#c4

The following revision refers to this bug:

chro...@googlecode.com

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Nov 19, 2015, 5:40:20 AM11/19/15

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Comment #5 on issue 526516 by bugd...@chromium.org: <textarea>

selectionStart always returns 0 in focus event

https://code.google.com/p/chromium/issues/detail?id=526516#c5

The following revision refers to this bug:

https://chromium.googlesource.com/chromium/src.git/+/d76505b8d68f4fffd18620d9ab1b4d19c467ec4c

commit d76505b8d68f4fffd18620d9ab1b4d19c467ec4c
Author: tkent <tk...@chromium.org>
Date: Thu Nov 19 10:34:51 2015

Set selection to INPUT/TEXTAREA before dispatching 'focus' event.

This CL moves updateFocusAppearance() call from Element::focus() to
Document::setFocusedElement() so that 'focus' event handler can refer to
correct
selection information.

The last updateLayoutIgnorePendingStylesheets() call in Element::focus is
unnecessary now. Because this CL removes it,
textfield-to-password-on-focus.html needs a delay to pour key inputs.

BUG=526516

Review URL: https://codereview.chromium.org/1437813002

Cr-Commit-Position: refs/heads/master@{#360545}

[modify]
http://crrev.com/d76505b8d68f4fffd18620d9ab1b4d19c467ec4c/third_party/WebKit/LayoutTests/fast/forms/selection-functions-expected.txt
[modify]
http://crrev.com/d76505b8d68f4fffd18620d9ab1b4d19c467ec4c/third_party/WebKit/LayoutTests/fast/forms/selection-functions.html
[modify]
http://crrev.com/d76505b8d68f4fffd18620d9ab1b4d19c467ec4c/third_party/WebKit/LayoutTests/fast/forms/textfield-to-password-on-focus.html
[modify]
http://crrev.com/d76505b8d68f4fffd18620d9ab1b4d19c467ec4c/third_party/WebKit/Source/core/dom/Document.cpp
[modify]
http://crrev.com/d76505b8d68f4fffd18620d9ab1b4d19c467ec4c/third_party/WebKit/Source/core/dom/Element.cpp
[modify]
http://crrev.com/d76505b8d68f4fffd18620d9ab1b4d19c467ec4c/third_party/WebKit/Source/core/html/HTMLInputElement.cpp
[modify]
http://crrev.com/d76505b8d68f4fffd18620d9ab1b4d19c467ec4c/third_party/WebKit/Source/core/html/HTMLTextAreaElement.cpp

chro...@googlecode.com

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Nov 19, 2015, 6:00:22 PM11/19/15

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Updates:
Status: Fixed
Labels: M-49

Comment #6 on issue 526516 by tk...@chromium.org: <textarea> selectionStart

always returns 0 in focus event

https://code.google.com/p/chromium/issues/detail?id=526516

(No comment was entered for this change.)

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