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Diffstat (limited to 'addons/gut/signal_watcher.gd')
| -rw-r--r-- | addons/gut/signal_watcher.gd | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/addons/gut/signal_watcher.gd b/addons/gut/signal_watcher.gd new file mode 100644 index 0000000..e127421 --- /dev/null +++ b/addons/gut/signal_watcher.gd @@ -0,0 +1,166 @@ +# ############################################################################## +# 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 |
