[iOS] iPhone should not allow selecting <optgroup> in <select multiple>

[Joseph Pecoraro]

iPhone should not allow selecting <optgroup> in <select multiple>

* TEST

    <select multiple="multiple">
        <optgroup label="foo">
            <option value="1">0001</option>
            <option value="2">0002</option>
            <option value="3">0003</option>
        </optgroup>
    </select>

* STEPS TO REPRODUCE
1. Load test
2. Tap the "foo" group
  => expected nothing to be selected
  => actual results were "0001" is selected

We should ignore taps on groups.

[Joseph Pecoraro]

<rdar://problem/18745292>

[Joseph Pecoraro]

Created attachment 240316 [details]
[PATCH] Proposed Fix

Patch may not apply as it may be waiting on another change near this.

[Darin Adler]

Comment on attachment 240316 [details]
[PATCH] Proposed Fix

View in context: https://bugs.webkit.org/attachment.cgi?id=240316&action=review

> Source/WebKit2/UIProcess/ios/forms/WKFormSelectPicker.mm:284
> +    // FIXME: <rdar://problem/18745253>
> +    // Group picker content view should not be checkable. If we get this delegate
> +    // reset the styles for the group content view so it still appears unselected.

I don’t think this comment makes it clear enough that this is a workaround for the above bug and can be removed if it’s fixed.

> Source/WebKit2/UIProcess/ios/forms/WKFormSelectPicker.mm:288
> +        [[view titleLabel] setTextColor:[UIColor colorWithWhite:0.0 alpha:0.5]];

Hard-coding this seems really unfortunate and could cause us trouble later. What mitigates that, I suppose, is that we will remove this code when the above mentioned bug is fixed.

[Joseph Pecoraro]

(In reply to comment #3)
> Comment on attachment 240316 [details]
> [PATCH] Proposed Fix
> 
> View in context:
> https://bugs.webkit.org/attachment.cgi?id=240316&action=review
> 
> > Source/WebKit2/UIProcess/ios/forms/WKFormSelectPicker.mm:288
> > +        [[view titleLabel] setTextColor:[UIColor colorWithWhite:0.0 alpha:0.5]];
> 
> Hard-coding this seems really unfortunate and could cause us trouble later.
> What mitigates that, I suppose, is that we will remove this code when the
> above mentioned bug is fixed.

Seeing as we already had a constant for disabled options, I'll add one and share it for groups. This is only duplicating our own styles, not another framework's styles.

[Joseph Pecoraro]

http://trac.webkit.org/changeset/175266