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[Gregor Anželj <gregor.anzelj@xxxxxxxxx>]

The workaround only works if page already conains a block of that type.
If the block is not present (e.g. when creating empty/blank page) the
icon will still not be visible.

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https://bugs.launchpad.net/bugs/1510421

Title:
  Better support for 3rd party blocktype icons in Mahara 15.10+

Status in Mahara:
  In Progress
Status in Mahara 15.10 series:
  Confirmed
Status in Mahara 16.04 series:
  In Progress

Bug description:
  As discussed in the Mahara dev meeting. With the new bootstrap themes,
  Mahara core blocktypes now use fontawesome for their icons.
  Consequently the template that displays each block in the block
  picker, is no longer using the old thumb.png or get_icon() mtehods to
  get the block's icon and display it. Instead, it just has a <span>
  with a class "icon-{blocktype.name}":

  https://git.mahara.org/mahara/mahara/blob/master/htdocs/theme/raw/templates/view/blocktypelist.tpl

  These are then mapped to fontawesome classes here:

  https://git.mahara.org/mahara/mahara/blob/master/htdocs/theme/raw/sass/typography/_icons.scss#L21

  It would make sense for us to support the old methods, and we could
  make the system do this automatically, with some logic in
  blocktypelist.tpl and/or in htdocs/blocktype/lib.php

  For now, the workaround is to create a style.css file for the block
  (under the block's own theme directory) and define the class in there,
  like this example from the clippy block: https://github.com/agwells
  /maharacontrib-blocktype-
  clippy/blob/master/theme/raw/static/style/style.css

   .icon-clippy::before {
       content: url(\../images/thumb.png);
   }

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