Bug 112410 – A placeholder renderer should not be taken to imply the existence of a text renderer in single line text controls

• Component: Layout and Rendering
• Status: RESOLVED FIXED

[Dominic Cooney]

There are a couple of places in the rendering of text inputs with placeholders that assume that if the placeholder is rendered, a renderer for the text must exist too. However this is not the case if ::-webkit-textfield-decoration-controller is set it to display: none; (or possibly other unusual values like display: table-cell;) which hides the text renderer's container.

This can be reproduced by adding a placeholder="x" attribute to the input element in the fast/forms/search/search-hide-decoration-container-crash.html layout test.

I think at least HTMLTextFormControlElement::fixPlaceholderRenderer and RenderTextControlSingleLine::layout need to be fixed.

[Dominic Cooney]

Created attachment 193242 [details]
Patch

[Dominic Cooney]

Comment on attachment 193242 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=193242&action=review

> Source/WebCore/html/HTMLTextFormControlElement.cpp:176
>          return;

I wonder if it would be possible to do this renderer swizzle using another layer of Shadow DOM instead of these renderer-level hacks. Shadow DOM could certainly swap the order of a couple of renderers.

[Tony Chang]

Comment on attachment 193242 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=193242&action=review

> LayoutTests/fast/forms/search/search-hide-decoration-container-crash.html:11
> -<input type="search">
> +<input type="search" placeholder="x">

Rather than replacing the old test, can we add a second <input> with placeholder?

[Dominic Cooney]

Created attachment 193493 [details]
Patch for CQ

[Dominic Cooney]

Comment on attachment 193493 [details]
Patch for CQ

Patch updates test based on reviewer's suggestion.

[WebKit Review Bot]

Comment on attachment 193493 [details]
Patch for CQ

Rejecting attachment 193493 [details] from commit-queue.

Failed to run "['/mnt/git/webkit-commit-queue/Tools/Scripts/webkit-patch', '--status-host=webkit-commit-queue.appspot.com', '--bot-id=gce-cq-03', 'validate-changelog', '--non-interactive', 193493, '--port=chromium-xvfb']" exit_code: 1 cwd: /mnt/git/webkit-commit-queue

/mnt/git/webkit-commit-queue/LayoutTests/ChangeLog neither lists a valid reviewer nor contains the string "Unreviewed" or "Rubber stamp" (case insensitive).

Full output: http://webkit-commit-queue.appspot.com/results/17114921

[Dominic Cooney]

Created attachment 193496 [details]
Patch for CQ (with "Reviewed by" this time)

[WebKit Review Bot]

Comment on attachment 193496 [details]
Patch for CQ (with "Reviewed by" this time)

Clearing flags on attachment: 193496

Committed r146038: <http://trac.webkit.org/changeset/146038>

[WebKit Review Bot]

All reviewed patches have been landed.  Closing bug.