134787 - [XBLFC] Active Accessibility: support XBL-based HTML form controls

Status: RESOLVED FIXED

(Core :: Disability Access APIs, defect, P1)

Description

[Aaron Leventhal]

Bug 57209 is Brian Ryner's bugs to implement HTML form controls in XBL.

This bug is to get the same MSAA support we have form the old HTML form controls
with these new form controls.

Comment 1

[Aaron Leventhal]

Attachment: Uses nsIAccessibleProvider() to to return accessible for input type="checkbox"

This changes GetAccesibleFor(), to use nsIAccessibleProvider whenever it is
implemented for an element type, not just for XUL.

It also tries to implement nsIAccessibleProvider() for a checkbox.

We get the nsIAccessibleProvider, but when we try to GetAccessible() with it,
we get:

************************************************************
* Call to xpconnect wrapped JSObject produced this error:  *
[Exception... "'Permission denied to get property UnnamedClass.classes' when
cal
ling method: [nsIAccessibleProvider::accessible]"  nsresult: "0x8057001e
(NS_ERR
OR_XPC_JS_THREW_STRING)"  location: "<unknown>"  data: no]
************************************************************

Comment 2

[Aaron Leventhal]

When checkbox.xml's GetAccessible() implementation tries to use
Components.classes,it runs into a security error:
* Call to xpconnect wrapped JSObject produced this error:  *
[Exception... "'Permission denied to get property UnnamedClass.classes' when ca
ling method: [nsIAccessibleProvider::accessible]"  nsresult: "0x8057001e (NS_ER
OR_XPC_JS_THREW_STRING)"  location: "<unknown>"  data: no]

We need some way to get nsIAccessibilityService().

This is apparently similar to the error Dharma and John Gaunt were getting in
bug 138020.

Comment 3

[Aaron Leventhal]

Attachment: Requires use of enablePrivilege('UniversalXPConnect') on file:// URL's in order to work, but good enough to start development

Unfortunately this means for now we'll have 3 kinds of checkbox accessible
creation methods.

I'll open new bugs for other controls. Seeking r= for checkbox.

Comment 4

[John Gaunt (redfive)]

Comment on attachment 83455 [details] [diff] [review]
Requires use of enablePrivilege('UniversalXPConnect') on file:// URL's in order to work, but good enough to start development

r=jgaunt

Comment 5

[Johnny Stenback (:jst)]

Comment on attachment 83455 [details] [diff] [review]
Requires use of enablePrivilege('UniversalXPConnect') on file:// URL's in order to work, but good enough to start development

sr=jst

Comment 6

[Aaron Leventhal]

checked in

Comment 7

[Firefox Bug Husbandry Bot]

https://bugzilla.mozilla.org/show_bug.cgi?id=1527381