Bug 146533 – AX: Selection change as a result of focusing an element should include that information in the intent

• Status: RESOLVED
• Resolution: FIXED
• Component: Accessibility

[Doug Russell]

Selection changes that come as a result of focusing an element need to be coordinated by AT to handle both a selection change notification and a focus change notification. To simplify this, a flag should be set in intent to allow platforms to add appropriate context to their notifications. This will make it easier to avoid things like double speak and/or needing to duplicate logic.

[Radar WebKit Bug Importer]

<rdar://problem/21642883>

[Doug Russell]

Created attachment 255967 [details]
patch

[Doug Russell]

Created attachment 255970 [details]
patch

[chris fleizach]

Comment on attachment 255970 [details]
patch

View in context: https://bugs.webkit.org/attachment.cgi?id=255970&action=review

> Source/WebCore/accessibility/AccessibilityRenderObject.cpp:1686
> +    if (AXObjectCache* cache = axObjectCache())

i don't think you have to worry about axObjectCache() being nullptr inside of an AX object

> Source/WebCore/dom/Element.h:325
> +    static AXTextStateChangeIntent defaultFocusTextStateChangeIntent() { return AXTextStateChangeIntent(AXTextStateChangeTypeSelectionMove, AXTextSelection { AXTextSelectionDirectionDiscontiguous, AXTextSelectionGranularityUnknown, true }); }

is this one different from the default AXTextStateChangeIntent(); 
for cases, like
select(Element::defaultFocusTextStateChangeIntent());
it would be nice to not have to pass the argument

> Source/WebCore/editing/FrameSelection.cpp:174
> +    AXTextStateChangeIntent newIntent;

can we remove the else and just initialize with
newIntent = intent;

> Source/WebCore/html/HTMLTextFormControlElement.h:113
> +    void restoreCachedSelection(const AXTextStateChangeIntent& = AXTextStateChangeIntent());

AXTextStateChangeIntent is  looking a bit wordy. Since this is being used all over non accessibility code, maybe the name should be changed to something like

TextIntention

[Doug Russell]

(In reply to comment #4)
> Comment on attachment 255970 [details]
> patch
> 
> View in context:
> https://bugs.webkit.org/attachment.cgi?id=255970&action=review
> 
> > Source/WebCore/accessibility/AccessibilityRenderObject.cpp:1686
> > +    if (AXObjectCache* cache = axObjectCache())
> 
> i don't think you have to worry about axObjectCache() being nullptr inside
> of an AX object

ok

> 
> > Source/WebCore/dom/Element.h:325
> > +    static AXTextStateChangeIntent defaultFocusTextStateChangeIntent() { return AXTextStateChangeIntent(AXTextStateChangeTypeSelectionMove, AXTextSelection { AXTextSelectionDirectionDiscontiguous, AXTextSelectionGranularityUnknown, true }); }
> 
> is this one different from the default AXTextStateChangeIntent(); 
> for cases, like
> select(Element::defaultFocusTextStateChangeIntent());
> it would be nice to not have to pass the argument

Yes. The default AXTextStateChangeIntent() is all unknown types and focusChange is false. I could have the default value be Element::defaultFocusTextStateChangeIntent() but that feels dangerous.

> 
> > Source/WebCore/editing/FrameSelection.cpp:174
> > +    AXTextStateChangeIntent newIntent;
> 
> can we remove the else and just initialize with
> newIntent = intent;

ok

> 
> > Source/WebCore/html/HTMLTextFormControlElement.h:113
> > +    void restoreCachedSelection(const AXTextStateChangeIntent& = AXTextStateChangeIntent());
> 
> AXTextStateChangeIntent is  looking a bit wordy. Since this is being used
> all over non accessibility code, maybe the name should be changed to
> something like
> 
> TextIntention

Would it be ok to do that in a future patch? I'd like to keep this one small.

[Doug Russell]

Created attachment 256044 [details]
patch

[Doug Russell]

Created attachment 256045 [details]
patch

[chris fleizach]

(In reply to comment #5)
> (In reply to comment #4)
> > Comment on attachment 255970 [details]
> > patch
> > 
> > View in context:
> > https://bugs.webkit.org/attachment.cgi?id=255970&action=review
> > 
> > > Source/WebCore/accessibility/AccessibilityRenderObject.cpp:1686
> > > +    if (AXObjectCache* cache = axObjectCache())
> > 
> > i don't think you have to worry about axObjectCache() being nullptr inside
> > of an AX object
> 
> ok
> 
> > 
> > > Source/WebCore/dom/Element.h:325
> > > +    static AXTextStateChangeIntent defaultFocusTextStateChangeIntent() { return AXTextStateChangeIntent(AXTextStateChangeTypeSelectionMove, AXTextSelection { AXTextSelectionDirectionDiscontiguous, AXTextSelectionGranularityUnknown, true }); }
> > 
> > is this one different from the default AXTextStateChangeIntent(); 
> > for cases, like
> > select(Element::defaultFocusTextStateChangeIntent());
> > it would be nice to not have to pass the argument
> 
> Yes. The default AXTextStateChangeIntent() is all unknown types and
> focusChange is false. I could have the default value be
> Element::defaultFocusTextStateChangeIntent() but that feels dangerous.
> 
> > 
> > > Source/WebCore/editing/FrameSelection.cpp:174
> > > +    AXTextStateChangeIntent newIntent;
> > 
> > can we remove the else and just initialize with
> > newIntent = intent;
> 
> ok
> 
> > 
> > > Source/WebCore/html/HTMLTextFormControlElement.h:113
> > > +    void restoreCachedSelection(const AXTextStateChangeIntent& = AXTextStateChangeIntent());
> > 
> > AXTextStateChangeIntent is  looking a bit wordy. Since this is being used
> > all over non accessibility code, maybe the name should be changed to
> > something like
> > 
> > TextIntention
> 
> Would it be ok to do that in a future patch? I'd like to keep this one small.

probably ok

[WebKit Commit Bot]

Comment on attachment 256045 [details]
patch

Clearing flags on attachment: 256045

Committed r186256: <http://trac.webkit.org/changeset/186256>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.

[Chris Dumez]

The new test is failing on some bots:
https://build.webkit.org/results/Apple%20Yosemite%20Debug%20WK1%20(Tests)/r186256%20(5807)/platform/mac/accessibility/selection-notification-focus-change-pretty-diff.html

[Chris Dumez]

Comment on attachment 256045 [details]
patch

View in context: https://bugs.webkit.org/attachment.cgi?id=256045&action=review

> LayoutTests/platform/mac/accessibility/selection-notification-focus-change-expected.txt:16
> +PASS axTextFocusChangeThree is true

Having those lines after the TEST COMPLETE is a good sign something is wrong with the test.

[Chris Dumez]

(In reply to comment #11)
> The new test is failing on some bots:
> https://build.webkit.org/results/Apple%20Yosemite%20Debug%20WK1%20(Tests)/
> r186256%20(5807)/platform/mac/accessibility/selection-notification-focus-
> change-pretty-diff.html

Tentative layout test fix landed in <http://trac.webkit.org/changeset/186264>.