ISSUE-74: How accessibility works for <canvas> is unclear.

canvas-accessibility

How accessibility works for <canvas> is unclear.

State:
CLOSED
Product:
HTML 5 spec
Raised by:
Steve Faulkner
Opened on:
2009-07-09
Description:
change proposals:
http://www.w3.org/html/wg/wiki/ChangeProposals/canvasaccessibilitynonav

Issue is detailed at:
http://esw.w3.org/topic/HTML/AddedElementCanvas

Related Bugs:
7011: Canvas accessible fallback provision is under specified.
http://www.w3.org/Bugs/Public/show_bug.cgi?id=7011
7404: But only if the element is being rendered needs to take into account <canvas> descendants...
http://www.w3.org/Bugs/Public/show_bug.cgi?id=7404

HTML5-SPEC-SECTIONS [the-canvas-element]
Related Actions Items:
Related emails:
  1. {minutes}} HTML WG telecon 2012-09-06 (from Paul.Cotton@microsoft.com on 2012-09-06)
  2. {minutes} HTML WG Telecon 2010-12-16: status of actions, calls, new decisions, task force reports (from Paul.Cotton@microsoft.com on 2010-12-16)
  3. {agenda} HTML WG Telecon 2010-12-16: status of actions, calls, new decisions, task force reports (from Paul.Cotton@microsoft.com on 2010-12-16)
  4. {agenda} HTML WG Telecon 2010-12-16: status of actions, calls, new decisions, task force reports (from Paul.Cotton@microsoft.com on 2010-12-15)
  5. Working Group Decision on ISSUE-74 canvas-accessibility and ISSUE-105 canvas-usemap (from mjs@apple.com on 2010-12-14)
  6. {minutes} HTML WG F2F minutes, Lyon, France, Nov 4-5 Part 1 (from Paul.Cotton@microsoft.com on 2010-11-09)
  7. {minutes} } HTML WG Telecon 2010-10-21: status of actions, calls, issues, heartbeat drafts, and TPAC (from Paul.Cotton@microsoft.com on 2010-10-21)
  8. {agenda} HTML WG Telecon 2010-10-21: status of actions, calls, issues, heartbeat drafts, and TPAC (from rubys@intertwingly.net on 2010-10-20)
  9. RE: {minutes} HTML WG Telecon 2010-10-14 actions, status of calls, issues and bugs, heartbeat drafts, task force reports (from adrianba@microsoft.com on 2010-10-14)
  10. {agenda} HTML WG Telecon 2010-10-14 actions, status of calls, issues and bugs, heartbeat drafts, task force reports (from Paul.Cotton@microsoft.com on 2010-10-13)
  11. ISSUE-74: canvas-accessibility and ISSUE-105 canvas-usemap - Straw Poll for Objections (from rubys@intertwingly.net on 2010-10-13)
  12. ISSUE-131 (caret-location-API): Should we add a caret location API to canvas, or is the focus API sufficient? [HTML 5 spec] (from sysbot+tracker@w3.org on 2010-10-13)
  13. Re: ISSUE-74 canvas-accessibility and ISSUE-105 canvas-use (from janina@rednote.net on 2010-10-07)
  14. {agenda} HTML WG Telecon 2010-09-23 status of calls, issues and bugs, heartbeat drafts (from mjs@apple.com on 2010-10-06)
  15. {agenda} HTML WG Telecon 2010-09-30 status of calls, issues and bugs, Task Force Reports (from rubys@intertwingly.net on 2010-09-28)
  16. RE: {minutes} HTML WG Telecon 2010-09-23 status of calls, issues and bugs, TPAC F2F (from adrianba@microsoft.com on 2010-09-23)
  17. {agenda} HTML WG Telecon 2010-09-23 status of calls, issues and bugs, TPAC F2F (from Paul.Cotton@microsoft.com on 2010-09-22)
  18. ISSUE-74 canvas-accessibility and ISSUE-105 canvas-usemap (from mjs@apple.com on 2010-09-21)
  19. {agenda} HTML WG Telecon 2010-09-09 status of calls, heartbeat, last call; task force reports; bugzilla notifications, discussion guidelines (from rubys@intertwingly.net on 2010-09-15)
  20. HTML Working Group Status (from plh@w3.org on 2010-08-27)
  21. RE: {minutes} HTML WG telecon 2010-08-19: WG decisions, Decision Policy, TF reports (from adrianba@microsoft.com on 2010-08-19)
  22. Re: Counter Proposal, ISSUE-74 (and ISSUE-105) (from joedwil@earthlink.net on 2010-07-30)
  23. Counter Proposal, ISSUE-74 (and ISSUE-105) (from chaals@opera.com on 2010-07-30)
  24. Re: Change proposal for ISSUE-74 and ISSUE-105 (from schwer@us.ibm.com on 2010-07-29)
  25. Re: Change proposal for ISSUE-74 and ISSUE-105 (from ian@hixie.ch on 2010-07-29)
  26. {minutes} HTML WG telecon 2010-07-29, WG decisions, issue review, WG surveys (from Paul.Cotton@microsoft.com on 2010-07-29)
  27. Re: Change proposal for ISSUE-74 and ISSUE-105 (from schwer@us.ibm.com on 2010-07-29)
  28. Change proposal for ISSUE-74 and ISSUE-105 (from ian@hixie.ch on 2010-07-29)
  29. {agenda} HTML WG telecon 2010-07-29, WG decisions, issue review, WG surveys (from Paul.Cotton@microsoft.com on 2010-07-27)
  30. RE: {minutes} HTML WG telecon 2010-07-22 (from adrianba@microsoft.com on 2010-07-22)
  31. RE: {agenda} HTML WG telecon 2010-07-22 (from eliotgra@microsoft.com on 2010-07-22)
  32. RE: {agenda} HTML WG telecon 2010-07-22 (from krisk@microsoft.com on 2010-07-22)
  33. {agenda} HTML WG telecon 2010-07-22 (from mjs@apple.com on 2010-07-21)
  34. Re: HTML-A11Y Task Force Recommendation: ISSUE-74 Canvas-Accessibility (from chaals@opera.com on 2010-07-15)
  35. Re: HTML-A11Y Task Force Recommendation: ISSUE-74 Canvas-Accessibility (from schwer@us.ibm.com on 2010-07-15)
  36. Re: HTML-A11Y Task Force Recommendation: ISSUE-74 Canvas-Accessibility (from jgraham@opera.com on 2010-07-15)
  37. {minutes} HTML WG telecon 2010-07-08: actions, issues, decisions, revised proposals, future surveys, TF reports (from Paul.Cotton@microsoft.com on 2010-07-08)
  38. FW: {agenda} HTML WG telecon 2010-07-08: actions, issues, decisions, revised proposals, future surveys, TF reports (from Paul.Cotton@microsoft.com on 2010-07-07)
  39. {agenda} HTML WG telecon 2010-07-08: actions, issues, decisions, revised proposals, future surveys, TF reports (from Paul.Cotton@microsoft.com on 2010-07-07)
  40. Re: CfC: Adopt ISSUE-105 canvas-usemap Change Proposal to add usemap attribute to the canvas element (from chaals@opera.com on 2010-06-24)
  41. Re: CfC: Adopt ISSUE-105 canvas-usemap Change Proposal to add usemap attribute to the canvas element (from chaals@opera.com on 2010-06-23)
  42. Re: CfC: Adopt ISSUE-105 canvas-usemap Change Proposal to add usemap attribute to the canvas element (from chaals@opera.com on 2010-06-23)
  43. ISSUE-74 canvas-accessibility - Chairs Solicit Alternate Proposals or Counter-Proposals (from rubys@intertwingly.net on 2010-06-23)
  44. RE: Adopt ISSUE-105 canvas-usemap Change Proposal to add usemap attribute to the canvas element (from adrianba@microsoft.com on 2010-06-21)
  45. Re: HTML-A11Y Task Force Recommendation: ISSUE-74 Canvas-Accessibility (from schwer@us.ibm.com on 2010-06-16)
  46. Re: CfC: Adopt ISSUE-105 canvas-usemap Change Proposal to add usemap attribute to the canvas element (from chaals@opera.com on 2010-06-15)
  47. Re: HTML-A11Y Task Force Recommendation: ISSUE-74 Canvas-Accessibility (from jgraham@opera.com on 2010-06-15)
  48. RE: HTML-A11Y Task Force Recommendation: ISSUE-74 Canvas-Accessibility (from xn--mlform-iua@xn--mlform-iua.no on 2010-06-15)
  49. RE: HTML-A11Y Task Force Recommendation: ISSUE-74 Canvas-Accessibility (from Paul.Cotton@microsoft.com on 2010-06-14)
  50. HTML-A11Y Task Force Recommendation: ISSUE-74 Canvas-Accessibility (from janina@rednote.net on 2010-06-14)
  51. {minutes} HTML WG telecon 2010-06-10: action items, decision policy, task force reports, publication status (from adrianba@microsoft.com on 2010-06-10)
  52. RE: {agenda} HTML WG telecon 2010-05-27 (from adrianba@microsoft.com on 2010-05-27)
  53. Re: {agenda} HTML WG telecon 2010-05-27 (from faulkner.steve@gmail.com on 2010-05-27)
  54. Re: {agenda} HTML WG telecon 2010-05-27 (from laura.lee.carlson@gmail.com on 2010-05-27)
  55. {agenda} HTML WG telecon 2010-05-27 (from rubys@intertwingly.net on 2010-05-26)
  56. {agenda} HTML WG telecon 2010-05-13: Action items, surveys, Task Force reports (from mjs@apple.com on 2010-05-12)
  57. RE: {agenda} HTML WG telcon 2010-04-29: Action items, new issues, Task Force reports - minutes of the meeting (from adrianba@microsoft.com on 2010-04-29)
  58. Minutes of HTML WG meeting, Apr 15 2010 (from Paul.Cotton@microsoft.com on 2010-04-19)
  59. {agenda} HTML WG telcon 2010-04-15: Action items, issues, decision policy, task forces, TPAC (from rubys@intertwingly.net on 2010-04-14)
  60. Minutes of HTML WG meeting, Apr 8 2010 (from Paul.Cotton@microsoft.com on 2010-04-08)
  61. Re: Patial Change request proposal for Issue 74 Canvas accessibility (from mjs@apple.com on 2010-04-01)
  62. [minutes] 20100325 HTML teleconference (from plh@w3.org on 2010-03-30)
  63. Re: {agenda} HTML WG telcon 2010-03-25: decision policy, issue status, updates from meetings, task force reports (from mjs@apple.com on 2010-03-24)
  64. {agenda} HTML WG telcon 2010-03-25: decision policy, issue status, updates from meetings, task force reports (from rubys@intertwingly.net on 2010-03-24)
  65. Patial Change request proposal for Issue 74 Canvas accessibility (from schwer@us.ibm.com on 2010-03-18)
  66. Re: Breakdown of issues (from rubys@intertwingly.net on 2010-03-12)
  67. Breakdown of issues (from mjs@apple.com on 2010-03-12)
  68. Re: {agenda} HTML WG telcon 2010-03-11: decision policy, proposals, task forces (from singer@apple.com on 2010-03-11)
  69. {agenda} HTML WG telcon 2010-03-11: decision policy, proposals, task forces (from rubys@intertwingly.net on 2010-03-10)
  70. Re: change proposal: Provide accessibility implementation information (in the Canvas 2d Context specification) for focus rectangle and caret (from mjs@apple.com on 2010-03-08)
  71. [minutes] HTML WG 2010004 (from plh@w3.org on 2010-03-04)
  72. {agenda} HTML WG telcon 2010-03-04: actions, publications, decision policy, issues (from Paul.Cotton@microsoft.com on 2010-03-03)
  73. {agenda} HTML WG telcon 2010-03-04: actions, publications, decision policy, issues (from Paul.Cotton@microsoft.com on 2010-03-03)
  74. Subject: {agenda} HTML WG telcon 2010-02-25: actions, issues, publication (from mjs@apple.com on 2010-02-24)
  75. Re: Issue 85 and (from faulkner.steve@gmail.com on 2010-02-18)
  76. RE: {agenda} HTML WG telcon 2010-02-18: actions, issues, publication (from Paul.Cotton@microsoft.com on 2010-02-18)
  77. RE: {agenda} HTML WG telcon 2010-02-18: actions, issues, publication (from geoff_freed@wgbh.org on 2010-02-17)
  78. Re: {agenda} HTML WG telcon 2010-02-18: actions, issues, publication (from janina@rednote.net on 2010-02-17)
  79. {agenda} HTML WG telcon 2010-02-18: actions, issues, publication (from mjs@apple.com on 2010-02-17)
  80. Re: {agenda} HTML WG telcon 2010-01-14: AIs, CfC/CfPs, TFs, plus: heartbeat docs (from shelley.just@gmail.com on 2010-01-13)
  81. {agenda} HTML WG telcon 2010-01-14: AIs, CfC/CfPs, TFs, plus: heartbeat docs (from rubys@intertwingly.net on 2010-01-13)
  82. Re: ISSUE-74: canvas-accessibility - Chairs Solicit Proposals (from mjs@apple.com on 2010-01-12)
  83. RE: {agenda} HTML WG telecon 2010-01-07 (from ishida@w3.org on 2010-01-11)
  84. {agenda} HTML WG telecon 2010-01-07 (from mjs@apple.com on 2010-01-06)
  85. {agenda} HTML WG telcon 2009-12-17: action items, calls for consensus/proposals, task forces (from Paul.Cotton@microsoft.com on 2009-12-15)
  86. {agenda} HTML WG telcon 2009-12-17: action items, calls for consensus/proposals, task forces (from Paul.Cotton@microsoft.com on 2009-12-15)
  87. Re: {agenda} HTML WG telcon 2009-10-29: action items, calls for consensus/proposals, task forces (from shelley.just@gmail.com on 2009-12-10)
  88. Re: {agenda} HTML WG telcon 2009-10-29: action items, calls for consensus/proposals, task forces (from shelley.just@gmail.com on 2009-12-10)
  89. Re: ISSUE-74: canvas-accessibility - Chairs Solicit Proposals (from chaals@opera.com on 2009-12-10)
  90. {agenda} HTML WG telcon 2009-10-29: action items, calls for consensus/proposals, task forces (from rubys@intertwingly.net on 2009-12-09)
  91. Re: ISSUE-74: canvas-accessibility - Chairs Solicit Proposals (from mjs@apple.com on 2009-12-09)
  92. Re: ISSUE-74: canvas-accessibility - Chairs Solicit Proposals (from chaals@opera.com on 2009-12-09)
  93. ISSUE-74: canvas-accessibility - Chairs Solicit Proposals (from mjs@apple.com on 2009-12-08)
  94. [Bug 7011] [in off-bug discussion] canvas accessible fallback provision is under specified (from bugzilla@wiggum.w3.org on 2009-11-03)
  95. minutes Re: {agenda} HTML WG telcon 2009-10-29: issues, action items, calls for consensus/proposals, task forces, F2F... (from cooper@w3.org on 2009-10-29)
  96. Re: {agenda} HTML WG telcon 2009-10-29: issues, action items, calls for consensus/proposals, task forces, F2F... (from singer@apple.com on 2009-10-29)
  97. Re: {agenda} HTML WG telcon 2009-10-29: issues, action items, calls for consensus/proposals, task forces, F2F... (from msporny@digitalbazaar.com on 2009-10-29)
  98. {agenda} HTML WG telcon 2009-10-29: issues, action items, calls for consensus/proposals, task forces, F2F... (from rubys@intertwingly.net on 2009-10-28)
  99. [Bug 7011] [in off-bug discussion] canvas accessible fallback provision is under specified (from bugzilla@wiggum.w3.org on 2009-09-28)
  100. {minutes} HTML WG telcon 2009-08-27 (from annevk@opera.com on 2009-08-27)
  101. {agenda} HTML WG telcon 2009-08-27 *PLEASE-READ* (from rubys@intertwingly.net on 2009-08-26)
  102. Path to Last Call (was closing various issues) (from rubys@intertwingly.net on 2009-08-22)
  103. Re: ISSUE-53: mediatypereg - suggest closing on 2009-09-03 (from ian@hixie.ch on 2009-08-22)
  104. Re: ISSUE-53: mediatypereg - suggest closing on 2009-09-03 (from rubys@intertwingly.net on 2009-08-22)
  105. {agenda} HTML WG telcon 2009-08-20 (from rubys@intertwingly.net on 2009-08-19)
  106. {minutes} HTML WG telcon 2009-08-13 for review (from connolly@w3.org on 2009-08-13)
  107. RE: Issue-74/Action-133 canvas-accessibility (from jfoliot@stanford.edu on 2009-08-12)
  108. Re: {agenda} HTML WG telcon 2009-08-13 (from cooper@w3.org on 2009-08-12)
  109. Re: Issue-74/Action-133 canvas-accessibility and ISSUE-15 immediate-mode-graphics [was: {agenda} HTML WG telcon 2009-08-13] (from mjs@apple.com on 2009-08-12)
  110. Re: Begin discussions for pushing Last Call into 2010 (from rubys@intertwingly.net on 2009-08-12)
  111. Re: {agenda} HTML WG telcon 2009-08-13 (from singer@apple.com on 2009-08-12)
  112. Begin discussions for pushing Last Call into 2010 (from shelleyp@burningbird.net on 2009-08-12)
  113. Re: Issue-74/Action-133 canvas-accessibility and ISSUE-15 immediate-mode-graphics [was: {agenda} HTML WG telcon 2009-08-13] (from connolly@w3.org on 2009-08-12)
  114. Re: {agenda} HTML WG telcon 2009-08-13 (from shelleyp@burningbird.net on 2009-08-12)
  115. {agenda} HTML WG telcon 2009-08-13 (from rubys@intertwingly.net on 2009-08-12)
  116. minutes HTML weekly 9 July for review (from connolly@w3.org on 2009-07-09)

Related notes:

[DanC]: see also http://esw.w3.org/topic/HTML/AddedElementCanvas

9 Jul 2009, 16:58:41

ACTION: Stevef report on canvas accessibility
http://www.w3.org/2009/07/09-html-wg-minutes.html#action03

Laura Carlson, 9 Jul 2009, 20:35:43

http://esw.w3.org/topic/HTML/AddedElementCanvas?action=show#head-7417bcc86e63e6a528872dd1ab93576887e6208d

Sam Ruby, 11 Aug 2009, 14:00:31

http://lists.w3.org/Archives/Public/wai-xtech/2009Jun/0093.html

Sam Ruby, 11 Aug 2009, 15:03:06

http://lists.w3.org/Archives/Public/public-html/2009Aug/1125.html

Sam Ruby, 22 Aug 2009, 08:11:51

Canvas accessibility progress report:
Richard Schwerdtfeger is working on a test patch that exposes the shadow DOM to the accessibility API and supports aria-activedescendant on canvas. Details at:
http://lists.w3.org/Archives/Public/public-canvas-api/2009OctDec/0019.html

Laura Carlson, 30 Oct 2009, 15:49:57

[MikeSmith]: see change proposal - http://www.w3.org/html/wg/wiki/ChangeProposals/canvasaccessibilitynonav

18 Mar 2010, 16:16:02

[MikeSmith]: Richard Schwerdtfeger, "Draft Revisions to Canvas 2D Context API " http://lists.w3.org/Archives/Public/public-canvas-api/2010AprJun/0003.html

12 Apr 2010, 01:48:02

[MikeSmith]: http://lists.w3.org/Archives/Public/public-canvas-api/2010AprJun/att-0003/2dcontext10-Apr-11.html edited version of Canvas 2D Context API, incorporating "Separate caret/selection from drawFocusRing"

12 Apr 2010, 01:50:03

[MikeSmith]: progress on this is currently blocked on getting feedback from Apple, Microsoft, and Mozilla on Rich's message from April 11 http://lists.w3.org/Archives/Public/public-html-a11y/2010Apr/0121.html explicitly asked for review comments from them

6 May 2010, 15:39:05

Bug triage sub-team notes the following bugs also potentially related to this issue:

http://www.w3.org/Bugs/Public/show_bug.cgi?id=11239
http://www.w3.org/Bugs/Public/show_bug.cgi?id=11240
http://www.w3.org/Bugs/Public/show_bug.cgi?id=11241
http://www.w3.org/Bugs/Public/show_bug.cgi?id=11242

Michael Cooper, 30 Nov 2010, 16:42:04

Resolved by WG Decision:

http://lists.w3.org/Archives/Public/public-html/2010Dec/0136.html

Maciej Stachowiak, 15 Dec 2010, 04:40:09

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Paul Cotton <Paul.Cotton@microsoft.com>, Maciej Stachowiak <mjs@apple.com>, Sam Ruby <rubys@intertwingly.net>, Chairs, Michael[tm] Smith <mike@w3.org>, Staff Contact
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