Event based dialogue handling (#443)

* Event based dialogue handling

* better imo

* typo

* Small script example

new script by NexIsDumb

---------

Co-authored-by: ⍚~Nex <87421482+NexIsDumb@users.noreply.github.com>

assets/songs/test/dialogue.hx

@@ -0,0 +1,5 @@
+function next(event)
+	if (!event.playFirst) trace("-");
+
+function postNext(event)
+	trace(curLine.char + " says: " + curLine.text);

source/funkin/backend/scripting/events/dialogue/DialogueNextLineEvent.hx

@@ -0,0 +1,14 @@
+package funkin.backend.scripting.events.dialogue;
+
+/**
+ * CANCEL this event to prevent continuing with the next dialogue.
+ *
+ * **NOTE**: To access the current, past or next lines, use `curLine`, `lastLine` or also `dialogueLines` in the `DialogueCutscene` class (they're globals and can be accessed at any time as long as the Dialogue Cutscene is active)!
+ */
+final class DialogueNextLineEvent extends CancellableEvent
+{
+	/**
+	 * If the dialogue has just been opened.
+	 */
+	public var playFirst:Bool = false;
+}

source/funkin/game/cutscenes/DialogueCutscene.hx

@@ -3,7 +3,7 @@ package funkin.game.cutscenes;
 import funkin.backend.utils.FunkinParentDisabler;
 import funkin.backend.scripting.events.dialogue.*;
 import funkin.backend.scripting.events.CancellableEvent;
-import funkin.backend.scripting.events.DynamicEvent;
+import funkin.backend.scripting.events.dialogue.DialogueNextLineEvent;
 import funkin.backend.scripting.Script;
 import flixel.sound.FlxSound;
 import funkin.game.cutscenes.dialogue.*;
@@ -138,8 +138,8 @@ class DialogueCutscene extends Cutscene {
 	public var canProceed:Bool = true;
 
 	public function next(playFirst:Bool = false) {
-		var event = EventManager.get(DynamicEvent).recycle(playFirst);
-		dialogueScript.call("next", [playFirst]);
+		var event = EventManager.get(DialogueNextLineEvent).recycle(playFirst);
+		dialogueScript.call("next", [event]);
 		if(event.cancelled || !canProceed) return;
 
 		if ((curLine = dialogueLines.shift()) == null) {
@@ -154,7 +154,7 @@ class DialogueCutscene extends Cutscene {
 		}
 
 		if (curLine.callback != null)
-			dialogueScript.call(curLine.callback, [playFirst]);
+			dialogueScript.call(curLine.callback, [event.playFirst]);
 
 		for (k=>c in charMap)
 			if (k != curLine.char)
@@ -167,8 +167,8 @@ class DialogueCutscene extends Cutscene {
 			dialogueBox.popupChar(char, force);
 		}
 
-		var finalSuffix:String = playFirst && dialogueBox.hasAnimation(curLine.bubble + "-firstOpen") ? "-firstOpen" : dialogueBox.hasAnimation(curLine.bubble + "-open") ? "-open" : "";
-		dialogueBox.playBubbleAnim(curLine.bubble, finalSuffix, curLine.text, curLine.format, curLine.speed, curLine.nextSound, curLine.textSound != null ? [curLine.textSound] : null, finalSuffix == "-firstOpen" || finalSuffix == "-open", !playFirst);
+		var finalSuffix:String = event.playFirst && dialogueBox.hasAnimation(curLine.bubble + "-firstOpen") ? "-firstOpen" : dialogueBox.hasAnimation(curLine.bubble + "-open") ? "-open" : "";
+		dialogueBox.playBubbleAnim(curLine.bubble, finalSuffix, curLine.text, curLine.format, curLine.speed, curLine.nextSound, curLine.textSound != null ? [curLine.textSound] : null, finalSuffix == "-firstOpen" || finalSuffix == "-open", !event.playFirst);
 
 		if(curLine.playSound != null) curLine.playSound.play();
 		if(curLine.changeMusic != null) {
@@ -178,7 +178,7 @@ class DialogueCutscene extends Cutscene {
 			curMusic.fadeIn(1, 0, curMusic.volume);
 		} else if(curLine.musicVolume != null && curMusic != null) curMusic.volume = curLine.musicVolume;
 
-		dialogueScript.call("postNext", [playFirst]);
+		dialogueScript.call("postNext", [event]);
 	}
 
 	public override function close() {