| Age | Commit message (Collapse) | Author | 
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This makes IPC GET_PIXELS use the new `wlc_pixels_read` call instead of
the deprecated `wlc_output_get_pixels`.
The old version worked by passing a callback function to wlc which would
grab the pixels and send them to the IPC client.
The new version works by maintaining a list of clients who have
requested the pixels of some output and then grap and send the pixels in
the output_post_render hook of the `wlc_interface`.
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This implements the IPC binding event for keyboard bindings.  It is
slightly different from the i3 implementation [1] since sway supports
more than one non-modifier key in a binding. Thus the json interface has
been changed from:
    {
      ...
      "symbol": "t",
      ...
    }
to:
    {
      ...
      "symbols": [ "t" ],
      ...
    }
[1] http://i3wm.org/docs/ipc.html#_binding_event
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Detects when a bar modifier key is pressed/released and sends a modifier
IPC event to any listeners (usually swaybars).
This way a swaybar can listen on the modifier event and hide/show the
bar accordingly (not implemented yet)
The modifier event looks like this:
    {
      "change": "pressed", // or released
      "modifier": "Mod4"
    }
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This makes sure that the workspace IPC event is triggered when needed.
Fixes #382 while making sure that the IPC event is only triggered once.
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Ref #270
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