ioncore/ioncore_quasiact.lua

   1 --
   2 -- ion/share/ioncore_quasiact.lua -- Frame quasiactivation support
   3 --
   4 -- Copyright (c) Tuomo Valkonen 2007-2009.
   5 --
   6 -- See the included file LICENSE for details.
   7 --
   8
   9 local qa_source={}
  10 local qa_target={}
  11
  12 local function quasi_activated(frame, src)
  13     local old=qa_source[frame]
  14     if old then
  15         qa_target[old]=nil
  16     end
  17     qa_source[frame]=src
  18     qa_target[src]=frame
  19     ioncore.defer(function() frame:set_grattr("quasiactive", "set") end)
  20 end
  21
  22 local function quasi_inactivated(frame, src)
  23     qa_source[frame]=nil
  24     qa_target[src]=nil
  25     ioncore.defer(function() frame:set_grattr("quasiactive", "unset") end)
  26 end
  27
  28 local function activated(src)
  29     local tgt=src:__return_target()
  30     if obj_is(tgt, "WFrame") then
  31         quasi_activated(tgt, src)
  32     elseif obj_is(tgt, "WGroup") then
  33         local mgr=tgt:manager()
  34         if obj_is(mgr, "WFrame") then
  35             quasi_activated(mgr, src)
  36         end
  37     end
  38 end
  39
  40 local function inactivated(src)
  41     local tgt=qa_target[src]
  42     if tgt then
  43         quasi_inactivated(tgt, src)
  44         return true
  45     end
  46 end
  47
  48 local function deinit(tgt)
  49     local src=qa_source[tgt]
  50     if src then
  51         qa_target[src]=nil
  52         qa_source[tgt]=nil
  53     end
  54 end
  55
  56 local function quasiact_notify(reg, how)
  57     if how=="activated" or how=="pseudoactivated" then
  58         activated(reg)
  59     elseif how=="inactivated" or how=="pseudoinactivated" then
  60         inactivated(reg)
  61     elseif how=="set_return" then
  62         if reg:is_active(true--[[pseudoact--]]) then
  63             activated(reg)
  64         end
  65     elseif how=="unset_return" then
  66         inactivated(reg)
  67     elseif how=="deinit" then
  68         inactivated(reg)
  69         deinit(reg)
  70     end
  71 end
  72
  73
  74 ioncore.get_hook("region_notify_hook"):add(quasiact_notify)