[Bugs] #4915 Write HIGH: Write redraws excessively - heats my lap

[Sugar Labs Bugs]

#4915: Write redraws excessively - heats my lap
--------------------------+-------------------------------------
  Reporter:  SAMdroid     |            Owner:
      Type:  defect       |           Status:  new
  Priority:  High         |        Milestone:  Unspecified
 Component:  Write        |          Version:  Git as of bugdate
  Severity:  Major        |       Resolution:
  Keywords:               |  Distribution/OS:  Fedora
Bug Status:  Unconfirmed  |
--------------------------+-------------------------------------

Comment (by quozl):

 Also occurs with Abiword 3.0.1 on Ubuntu 16.04.

 When the *draw* signal is connected on the Abi.Widget, normal calls occur
 until the first character is typed, then a continuous stream of signals is
 received, with a cairo clip rectangle corresponding to the document body.

 Method:

 {{{
     def __init__(self, handle):
         ...
         self.abiword_canvas.connect('draw', self.__draw_cb)

     def __draw_cb(self, widget, cr):
         logger.error('__draw_cb cr=%r' % cr.copy_clip_rectangle_list())
 }}}

 Result:

 {{{
 1467794524.658957 ERROR write-activity: We are creating an activity
 1467794524.729933 ERROR write-activity: __draw_cb cr=(0.0, 0.0, 1024.0,
 768.0)
 1467794524.746117 ERROR write-activity: __draw_cb cr=(1009.0, 0.0, 15.0,
 633.0)
 1467794526.992213 ERROR write-activity: __draw_cb cr=(0.0, 0.0, 1009.0,
 768.0)
 1467794527.010463 ERROR write-activity: __draw_cb cr=(0.0, 0.0, 1009.0,
 768.0)
 1467794527.027780 ERROR write-activity: __draw_cb cr=(0.0, 0.0, 1009.0,
 768.0)
 1467794527.045404 ERROR write-activity: __draw_cb cr=(0.0, 0.0, 1009.0,
 768.0)
 1467794527.062891 ERROR write-activity: __draw_cb cr=(0.0, 0.0, 1009.0,
 768.0)
 1467794527.080091 ERROR write-activity: __draw_cb cr=(0.0, 0.0, 1009.0,
 768.0)
 1467794527.098255 ERROR write-activity: __draw_cb cr=(0.0, 0.0, 1009.0,
 768.0)
 1467794527.115963 ERROR write-activity: __draw_cb cr=(0.0, 0.0, 1009.0,
 768.0)
 1467794527.132660 ERROR write-activity: __draw_cb cr=(0.0, 0.0, 1009.0,
 768.0)
 1467794527.149889 ERROR write-activity: __draw_cb cr=(0.0, 0.0, 1009.0,
 768.0)
 1467794527.168202 ERROR write-activity: __draw_cb cr=(0.0, 0.0, 1009.0,
 768.0)
 }}}

 My guess is that this is a regression in Abiword or Gtk.  It also occurs
 with /usr/bin/abiword started from Terminal in Sugar and Terminal in
 Gnome.  So it isn't a problem with Write itself.

 See also https://bugs.launchpad.net/ubuntu/+source/abiword/+bug/1574278

--
Ticket URL: <https://bugs.sugarlabs.org/ticket/4915#comment:2>
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