Moodle
  1. Moodle
  2. MDL-26697 mediaplugin fixes and improvements META
  3. MDL-21491

YouTube filter - "wmode" makes player inaccessible to keyboard users

    Details

    • Type: Sub-task Sub-task
    • Status: Closed
    • Priority: Minor Minor
    • Resolution: Fixed
    • Affects Version/s: 1.9.6, 1.9.7, 2.0
    • Fix Version/s: 2.0.3
    • Component/s: Accessibility, Filters
    • Labels:
      None
    • Environment:
      Windows XP/Firefox 3.6; Windows/MSIE 7... (note, a wider, non-Moodle bug makes Flash inaccessible in Mac OS X/Firefox 3.6).
    • Affected Branches:
      MOODLE_19_STABLE, MOODLE_20_STABLE
    • Fixed Branches:
      MOODLE_20_STABLE
    • Rank:
      16568

      Description

      The parameter values "transparent" and "opaque" (that is, not the default "window") prevent keyboard users from using the TAB key to access and control embedded objects. Please see my blog post for details and related links, "Flash wmode considered harmful" (September 2009), http://freear.org.uk/node/22 - as I note there, most content creators/sites do not need "transparent" Flash objects (and the YouTube embed code does not contain it), so removing this parameter should not be an issue.

      I have found the related bugs/issues MDL-5938 "Transparent background for swf", and MDL-19231"Add filter to process YouTube..." (Moodle 1.9).

      The solution is to remove the following line in function "mediaplugin_filter_youtube_callback", in filter/mediaplugin/filter.php:

      <param name="wmode" value="transparent" />

      Patch to follow. Yours,

      Nick

        Issue Links

          Activity

          Nick Freear created issue -
          Nick Freear made changes -
          Field Original Value New Value
          Attachment patch_moodle_MDL-21491_access_wmode_nfreear_1feb10.diff [ 19494 ]
          Nick Freear made changes -
          Link This issue has a non-specific relationship to MDL-19231 [ MDL-19231 ]
          Nick Freear made changes -
          Link This issue has a non-specific relationship to MDL-5938 [ MDL-5938 ]
          Martin Dougiamas made changes -
          Workflow jira [ 34996 ] MDL Workflow [ 45856 ]
          Petr Škoda made changes -
          Assignee moodle.com [ moodle.com ] Petr Škoda (skodak) [ skodak ]
          Petr Škoda made changes -
          Parent MDL-26697 [ 42777 ]
          Issue Type Bug [ 1 ] Sub-task [ 5 ]
          Petr Škoda made changes -
          Fix Version/s 2.0.3 [ 10537 ]
          Petr Škoda made changes -
          Status Open [ 1 ] Closed [ 6 ]
          Resolution Fixed [ 1 ]
          Martin Dougiamas made changes -
          Workflow MDL Workflow [ 45856 ] MDL Full Workflow [ 93031 ]

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              Dates

              • Created:
                Updated:
                Resolved: