I think ATK states, more precisely ATK_STATE_EDITABLE could be used to check whether attribute/element is settable.
Created attachment 217936 [details] patch
Attachment 217936 [details] did not pass style-queue: Failed to run "['Tools/Scripts/check-webkit-style', '--diff-files', u'LayoutTests/ChangeLog', u'LayoutTests/accessibility/content-editable-expected.txt', u'LayoutTests/accessibility/content-editable.html', u'LayoutTests/platform/mac/accessibility/content-editable-expected.txt', u'LayoutTests/platform/mac/accessibility/content-editable.html', u'Tools/ChangeLog', u'Tools/DumpRenderTree/atk/AccessibilityUIElementAtk.cpp', u'Tools/WebKitTestRunner/InjectedBundle/atk/AccessibilityUIElementAtk.cpp']" exit_code: 1 Tools/WebKitTestRunner/InjectedBundle/atk/AccessibilityUIElementAtk.cpp:765: Weird number of spaces at line-start. Are you using a 4-space indent? [whitespace/indent] [3] Total errors found: 1 in 6 files If any of these errors are false positives, please file a bug against check-webkit-style.
Created attachment 217937 [details] patch
Comment on attachment 217937 [details] patch Clearing flags on attachment: 217937 Committed r159867: <http://trac.webkit.org/changeset/159867>
All reviewed patches have been landed. Closing bug.