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Accessibility/IAccessible2/Agenda/20080909

From The Linux Foundation

Agenda for 2008/09/09

  1. Introductions if needed
  2. Approval of minutes - Corrections? Approval?
  3. LF: Open A11y news - Janina
  4. AccProbe inspect tool - Mike Squillace
  5. Firefox - Marco Zehe
    • Firefox 3 is implementing text attributes. This is being tracked with bug 340809.
    • References:
    • Static text:
      • For Firefox this is text generated by the browser such as number and bullet prefixes in lists, and possibly in the future, things like tables of contents, indexes, footnotes, text inserted via CSS before/after, etc. This is bug 445516. Symphony will use the currently specified list attribute. For Symphony, tables of contents, indexes, footnotes, etc. are handled as any other kind of text.
      • Since NVDA indicated this attribute isn't necessary should it be included in the IA2 spec?
      • If we include it, should the attribute be named static or auto (or auto-generated)?
      • Is there a use case for attribute values indicating caret behavior?
        1. all: can move caret through text, i.e. the common case
        2. first: can only move caret to the first character, e.g. a date field in Symphony
        3. none: can't move the caret into the text at all, e.g. list item bullets/numbers
  6. Access to spelling and grammar errors
    • OpenOffice will implement an interface for UAAPI, but will map that to text attributes. (Mac already has text attributes for spelling errors.) They will not be able to fire related spelling/grammar error events in the first release.
    • IA2 needs new events for spelling and grammar errors.
    • Since MSAA WinEvents cannot provide related information, i.e. the related strings which are in error, IA2 will have to do one of the following:
      1. Add methods to fetch the spelling/grammar error strings.
      2. If the asynchronous nature of this in the out of process situation of NVDA is a problem we may have to add an event registration/callback mechanism to IA2.
    • In a browser, ARIA provides for various reasons that a range of text could be invalid -- "spelling", "grammar", or "true". The value "true" is used for the general case where data isn't valid in a particular context, for example in the case of an input tokenizer processing a list of email addresses separated by commas and one of the email addresses is incorrect. Are there any IA2 issues that need to be addressed?
  7. IA2 1.0.2 review period has completed.
    • Pending review by Peter Korn.
    • Remaining work items:
      • Submit to the Linux Foundation Board of Directors for approval.
      • Move 3/26/2007 1.0.1 IDL to BZR.
      • When 1.0.2 is approved move the IDL to BZR.
  8. Proxy DLL
    • Jamies's RC file is different than the one attached to bug 110. He will send a diff to Pete for review. After resolving that Jamie will build a DLL and attach it to bug 110.
    • When the 1.0.2 files are added to BZR, Pete to include the files needed to build the proxy DLL.
    • Nobody has yet created the DLL using Visual C Express Edition so once someone has done that we need to update the process in the wiki.
    • That wiki page probably needs other changes.

No progress on the following

  1. Access to smart tags
    • Symphony uses IAHypertext/IAHyperlink for smart tags. This seems reasonable because smart tags are very similar to links. They represent actionable text. IAHyperlink can represent more than one action which is common for smart tags.
      • One requirement is for links and smart tags to be differentiated. This can be done with an object attribute on the accessible that represents the link object. Are there any issues with that approach?
  2. IA2 issues from Calvin Gaisford, opened on the behalf of AIA.
  3. IA2 object attributes specification.
    • The Symphony and FF3 object attributes will be reviewed. The common attributes will become part of the IA2 object attributes spec and the spec will reference the FF3 and Symphony specific specifications. (The Symphony object attributes are not documented on any Symphony web site, but they'll soon be documented on the IA2 site.)
    • Pete to add a "display" attribute with CSS2 values.
  4. Items raised by NVDA last year need to be put on the agenda for an upcoming Open A11y meeting
    • These are generic issues that need to be solved for both IA2 and ATK/AT-SPI dealing with objects contained in documents and tables
    • See items 4 and 5 in the October 2nd 2007 minutes for the history.
    • This was discussed during the January 22 Open a11y meeting.
    • These should be reopened and discussed with Willie and Li Yuan at a call convenient to the US, China, and Australia.
  5. Eclipse
  6. Wikipedia
  7. Developer Guide - Best practices document. We should start an outline for a best practices document. For starters it should define the following:
    • What events should be fired for each role and in what order.
    • What object hierarchy should be used. There are two today, a flat hierarchy as used in Symphony and a deeper hierarchy as used in Firefox. These two should be documented and in order to cut down on the proliferation of designs, future applications should attempt to use one or the other.
  8. Oleacc.idl
    • No new status on when it will be back in the SDK.
  9. FAQ
  10. Access to document revisions - from the ODF AccSC
    • This was reviewed by the AIA Interop group. The following issues were raised.
      • What is the solution for non-text attributes, e.g. tables, images, charts, cells, spreadsheets?
      • How are comment only revisions handled?
      • Probably need more kinds of format changes besides insertion, deletion, and format change.
      • Use cases are needed.
      • getSegmentAtOffset (singular) needs to be getSegmentsAtOffset (plural) because unlink links there could be overlapping insertions and deletions.
    • Once these issues are resolved Li Yuan, the committer for ATK/AT-SPI will develop a patch.

enum IA2RevisionType {
  IA2_REVTYPE_INSERTION, 
  IA2_REVTYPE_DELETION,
  IA2_REVTYPE_FORMAT_CHANGE  // The revision is due to any change in formatting attributes. 
};

typedef struct {
    enum IA2RevisionType type;  
    BSTR time;  ///< ISO 8601 format:  YYYY-MM-DDThh:mm:ss (eg 1997-07-16T19:20:21)
    BSTR author;
    BSTR comments;
} IA2RevisionInformation;

IARevisionText:
 
// Note: an object that implements IARevisionText must also implement IAText
 
// returns the number of segments available for the
// block of text represented by the IARevisionText object.
// this number is 1 based
get_segmentCount( long* count );
 
// returns a specific segment based on the index passed in
// the index is 0 based.
// no two indexes should return the same segment.
// any index >= 0, and less than the segment count should return a valid segment
// any index outside those bounds should set HRESULT to S_FALSE and return NULL
get_segment( long index,  IARevisionSegment** seg );
 
// returns a segment whose boundaries encompass the offset provided
// if there are no segments that correspond to the given offset, an error is produced
// offsets correspond identically to those used by IAText and IAHyperlink
get_segmentAtOffset( long offset, IARevisionSegment** seg );

IARevisionSegment:
 
// returns the bounding offsets of the segment within the IARevisionText/IAText object.
// the end offset is one past the last character in the revision text
get_bounds( long* start, long* end );

// returns a struct containing date/time, author, and comments
get_attributes( IA2RevisionAttributes *attributes );
 
// returns a set of name value pairs describing additional application
// specific attributes in the format "name:value;name:value"
get_extraAttributes( BSTR* extraAttributes );

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