feature: Added a simple tools simplified text typer

Assets/Scripts/Messaging/TextUtility.cs

@@ -0,0 +1,94 @@
+using System.Collections.Generic;
+using System.Text.RegularExpressions;
+using UnityEngine;
+
+namespace Messaging {
+	public class DialogueUtility : MonoBehaviour {
+		private const string REMAINDER_REGEX = "(.*?((?=>)|(/|$)))";
+		private const string PAUSE_REGEX_STRING = "<p:(?<pause>" + REMAINDER_REGEX + ")>";
+		private static readonly Regex PauseRegex = new(PAUSE_REGEX_STRING);
+		private const string SPEED_REGEX_STRING = "<sp:(?<speed>" + REMAINDER_REGEX + ")>";
+		private static readonly Regex SpeedRegex = new(SPEED_REGEX_STRING);
+
+		private static readonly Dictionary<string, float> PauseDictionary = new() {
+			{ "tiny", .1f },
+			{ "short", .25f },
+			{ "normal", 0.666f },
+			{ "long", 1f },
+			{ "read", 2f },
+		};
+
+		public static List<DialogueCommand> ProcessInputString(string message, out string processedMessage) {
+			List<DialogueCommand> result = new();
+			processedMessage = message;
+
+			processedMessage = HandlePauseTags(processedMessage, result);
+			processedMessage = HandleSpeedTags(processedMessage, result);
+
+			return result;
+		}
+
+		private static string HandleSpeedTags(string processedMessage, List<DialogueCommand> result) {
+			MatchCollection speedMatches = SpeedRegex.Matches(processedMessage);
+			foreach (Match match in speedMatches) {
+				string stringVal = match.Groups["speed"].Value;
+				if (!float.TryParse(stringVal, out float val)) {
+					val = 150f;
+				}
+				result.Add(new DialogueCommand {
+					Position = VisibleCharactersUpToIndex(processedMessage, match.Index),
+					Type = DialogueCommandType.TextSpeedChange,
+					FloatValue = val
+				});
+			}
+			processedMessage = Regex.Replace(processedMessage, SPEED_REGEX_STRING, "");
+			return processedMessage;
+		}
+
+		private static string HandlePauseTags(string processedMessage, List<DialogueCommand> result) {
+			MatchCollection pauseMatches = PauseRegex.Matches(processedMessage);
+			foreach (Match match in pauseMatches) {
+				string val = match.Groups["pause"].Value;
+				string pauseName = val;
+				Debug.Assert(PauseDictionary.ContainsKey(pauseName), "no pause registered for '" + pauseName + "'");
+				result.Add(new DialogueCommand {
+					Position = VisibleCharactersUpToIndex(processedMessage, match.Index),
+					Type = DialogueCommandType.Pause,
+					FloatValue = PauseDictionary[pauseName]
+				});
+			}
+			processedMessage = Regex.Replace(processedMessage, PAUSE_REGEX_STRING, "");
+			return processedMessage;
+		}
+
+		private static int VisibleCharactersUpToIndex(string message, int index) {
+			int result = 0;
+			bool insideBrackets = false;
+			for (int i = 0; i < index; i++) {
+				if (message[i] == '<') {
+					insideBrackets = true;
+				} else if (message[i] == '>') {
+					insideBrackets = false;
+					result--;
+				}
+				if (!insideBrackets) {
+					result++;
+				} else if (i + 6 < index && message.Substring(i, 6) == "sprite") {
+					result++;
+				}
+			}
+			return result;
+		}
+	}
+
+	public struct DialogueCommand {
+		public int Position;
+		public DialogueCommandType Type;
+		public float FloatValue;
+	}
+
+	public enum DialogueCommandType {
+		Pause,
+		TextSpeedChange,
+	}
+}