Fix audio player not resetting after wav finishes

(cherry picked from commit daa62ccaa3ba2174dc348ee09987547dbe24a24f)

editor/plugins/audio_stream_editor_plugin.cpp

@@ -109,6 +109,8 @@ void AudioStreamEditor::_changed_callback(Object *p_changed, const char *p_prop)
 void AudioStreamEditor::_play() {
 
 	if (_player->is_playing()) {
+		// '_pausing' variable indicates that we want to pause the audio player, not stop it. See '_on_finished()'.
+		_pausing = true;
 		_player->stop();
 		_play_button->set_icon(get_icon("MainPlay", "EditorIcons"));
 		set_process(false);
@@ -131,10 +133,13 @@ void AudioStreamEditor::_stop() {
 void AudioStreamEditor::_on_finished() {
 
 	_play_button->set_icon(get_icon("MainPlay", "EditorIcons"));
-	if (_current == _player->get_stream()->get_length()) {
+	if (!_pausing) {
 		_current = 0;
 		_indicator->update();
+	} else {
+		_pausing = false;
 	}
+	set_process(false);
 }
 
 void AudioStreamEditor::_draw_indicator() {
@@ -210,8 +215,6 @@ void AudioStreamEditor::_bind_methods() {
 AudioStreamEditor::AudioStreamEditor() {
 
 	set_custom_minimum_size(Size2(1, 100) * EDSCALE);
-	_current = 0;
-	_dragging = false;
 
 	_player = memnew(AudioStreamPlayer);
 	_player->connect("finished", this, "_on_finished");

editor/plugins/audio_stream_editor_plugin.h

@@ -42,17 +42,18 @@ class AudioStreamEditor : public ColorRect {
 	GDCLASS(AudioStreamEditor, ColorRect);
 
 	Ref<AudioStream> stream;
-	AudioStreamPlayer *_player;
-	ColorRect *_preview;
-	Control *_indicator;
-	Label *_current_label;
-	Label *_duration_label;
+	AudioStreamPlayer *_player = nullptr;
+	ColorRect *_preview = nullptr;
+	Control *_indicator = nullptr;
+	Label *_current_label = nullptr;
+	Label *_duration_label = nullptr;
 
-	ToolButton *_play_button;
-	ToolButton *_stop_button;
+	ToolButton *_play_button = nullptr;
+	ToolButton *_stop_button = nullptr;
 
-	float _current;
-	bool _dragging;
+	float _current = 0;
+	bool _dragging = false;
+	bool _pausing = false;
 
 protected:
 	void _notification(int p_what);