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+# ##############################################################################
+# The MIT License (MIT)
+# =====================
+#
+# Copyright (c) 2020 Tom "Butch" Wesley
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+#
+# ##############################################################################
+
+# Some arbitrary string that should never show up by accident. If it does, then
+# shame on you.
+const ARG_NOT_SET = '_*_argument_*_is_*_not_set_*_'
+
+# This hash holds the objects that are being watched, the signals that are being
+# watched, and an array of arrays that contains arguments that were passed
+# each time the signal was emitted.
+#
+# For example:
+# _watched_signals => {
+# ref1 => {
+# 'signal1' => [[], [], []],
+# 'signal2' => [[p1, p2]],
+# 'signal3' => [[p1]]
+# },
+# ref2 => {
+# 'some_signal' => [],
+# 'other_signal' => [[p1, p2, p3], [p1, p2, p3], [p1, p2, p3]]
+# }
+# }
+#
+# In this sample:
+# - signal1 on the ref1 object was emitted 3 times and each time, zero
+# parameters were passed.
+# - signal3 on ref1 was emitted once and passed a single parameter
+# - some_signal on ref2 was never emitted.
+# - other_signal on ref2 was emitted 3 times, each time with 3 parameters.
+var _watched_signals = {}
+var _utils = load('res://addons/gut/utils.gd').get_instance()
+
+func _add_watched_signal(obj, name):
+ # SHORTCIRCUIT - ignore dupes
+ if(_watched_signals.has(obj) and _watched_signals[obj].has(name)):
+ return
+
+ if(!_watched_signals.has(obj)):
+ _watched_signals[obj] = {name:[]}
+ else:
+ _watched_signals[obj][name] = []
+ obj.connect(name, self, '_on_watched_signal', [obj, name])
+
+# This handles all the signals that are watched. It supports up to 9 parameters
+# which could be emitted by the signal and the two parameters used when it is
+# connected via watch_signal. I chose 9 since you can only specify up to 9
+# parameters when dynamically calling a method via call (per the Godot
+# documentation, i.e. some_object.call('some_method', 1, 2, 3...)).
+#
+# Based on the documentation of emit_signal, it appears you can only pass up
+# to 4 parameters when firing a signal. I haven't verified this, but this should
+# future proof this some if the value ever grows.
+func _on_watched_signal(arg1=ARG_NOT_SET, arg2=ARG_NOT_SET, arg3=ARG_NOT_SET, \
+ arg4=ARG_NOT_SET, arg5=ARG_NOT_SET, arg6=ARG_NOT_SET, \
+ arg7=ARG_NOT_SET, arg8=ARG_NOT_SET, arg9=ARG_NOT_SET, \
+ arg10=ARG_NOT_SET, arg11=ARG_NOT_SET):
+ var args = [arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10, arg11]
+
+ # strip off any unused vars.
+ var idx = args.size() -1
+ while(str(args[idx]) == ARG_NOT_SET):
+ args.remove(idx)
+ idx -= 1
+
+ # retrieve object and signal name from the array and remove them. These
+ # will always be at the end since they are added when the connect happens.
+ var signal_name = args[args.size() -1]
+ args.pop_back()
+ var object = args[args.size() -1]
+ args.pop_back()
+
+ _watched_signals[object][signal_name].append(args)
+
+func does_object_have_signal(object, signal_name):
+ var signals = object.get_signal_list()
+ for i in range(signals.size()):
+ if(signals[i]['name'] == signal_name):
+ return true
+ return false
+
+func watch_signals(object):
+ var signals = object.get_signal_list()
+ for i in range(signals.size()):
+ _add_watched_signal(object, signals[i]['name'])
+
+func watch_signal(object, signal_name):
+ var did = false
+ if(does_object_have_signal(object, signal_name)):
+ _add_watched_signal(object, signal_name)
+ did = true
+ return did
+
+func get_emit_count(object, signal_name):
+ var to_return = -1
+ if(is_watching(object, signal_name)):
+ to_return = _watched_signals[object][signal_name].size()
+ return to_return
+
+func did_emit(object, signal_name):
+ var did = false
+ if(is_watching(object, signal_name)):
+ did = get_emit_count(object, signal_name) != 0
+ return did
+
+func print_object_signals(object):
+ var list = object.get_signal_list()
+ for i in range(list.size()):
+ print(list[i].name, "\n ", list[i])
+
+func get_signal_parameters(object, signal_name, index=-1):
+ var params = null
+ if(is_watching(object, signal_name)):
+ var all_params = _watched_signals[object][signal_name]
+ if(all_params.size() > 0):
+ if(index == -1):
+ index = all_params.size() -1
+ params = all_params[index]
+ return params
+
+func is_watching_object(object):
+ return _watched_signals.has(object)
+
+func is_watching(object, signal_name):
+ return _watched_signals.has(object) and _watched_signals[object].has(signal_name)
+
+func clear():
+ for obj in _watched_signals:
+ if(_utils.is_not_freed(obj)):
+ for signal_name in _watched_signals[obj]:
+ obj.disconnect(signal_name, self, '_on_watched_signal')
+ _watched_signals.clear()
+
+# Returns a list of all the signal names that were emitted by the object.
+# If the object is not being watched then an empty list is returned.
+func get_signals_emitted(obj):
+ var emitted = []
+ if(is_watching_object(obj)):
+ for signal_name in _watched_signals[obj]:
+ if(_watched_signals[obj][signal_name].size() > 0):
+ emitted.append(signal_name)
+
+ return emitted