private static async void HandleScriptModifiedAsync(string assetPath)
{
if (!Engine.Initialized || !(Engine.Behaviour is RuntimeBehaviour) || !configuration.HotReloadScripts ||
!ObjectUtils.IsValid(player.PlayedScript) || player.Playlist?.Count == 0)
{
return;
}
var scriptGuid = AssetDatabase.AssetPathToGUID(assetPath);
var scriptName = editorResources.GetRecordByGuid(scriptGuid)?.Name;
if (player.PlayedScript.Name != scriptName)
{
return;
}
var lastPlayedLineIndex = (player.PlayedCommand ?? player.Playlist.Last()).PlaybackSpot.LineIndex;
// Find the first modified line in the updated script (before the played line).
var rollbackIndex = -1;
for (int i = 0; i < lastPlayedLineIndex; i++)
{
if (!player.PlayedScript.Lines.IsIndexValid(i)) // The updated script ends before the currently played line.
{
rollbackIndex = player.Playlist.GetCommandBeforeLine(i - 1, 0)?.PlaybackSpot.LineIndex ?? 0;
break;
}
var oldLineHash = playedLineHashes[i];
var newLine = player.PlayedScript.Lines[i];
if (oldLineHash.EqualsFast(newLine.LineHash))
{
continue;
}
rollbackIndex = player.Playlist.GetCommandBeforeLine(i, 0)?.PlaybackSpot.LineIndex ?? 0;
break;
}
if (rollbackIndex > -1) // Script has changed before the played line.
// Rollback to the line before the first modified one.
{
await stateManager.RollbackAsync(s => s.PlaybackSpot.LineIndex == rollbackIndex);
}
// Update the playlist and play.
var resumeLineIndex = rollbackIndex > -1 ? rollbackIndex : lastPlayedLineIndex;
var playlist = new ScriptPlaylist(player.PlayedScript, scriptManager);
var playlistIndex = player.Playlist.FindIndex(c => c.PlaybackSpot.LineIndex == resumeLineIndex);
player.Play(playlist, playlistIndex);
if (player.WaitingForInput)
{
player.SetWaitingForInputEnabled(false);
}
}
/// <summary>
/// Performs hot-reload of the currently played script.
/// </summary>
public static async UniTask ReloadPlayedScriptAsync()
{
if (player?.Playlist is null || player.Playlist.Count == 0 || !player.PlayedScript)
{
Debug.LogError("Failed to perform hot reload: script player is not available or no script is currently played.");
return;
}
var requireReload = string.IsNullOrEmpty(AssetDatabase.GetAssetPath(player.PlayedScript));
if (requireReload) // In case the played script is stored outside of Unity project, force reload it.
{
var prevLineHashes = playedLineHashes; // Otherwise they're overridden when playing the loaded script below.
var scriptName = player.PlayedScript.Name;
scriptManager.UnloadScript(scriptName);
var script = await scriptManager.LoadScriptAsync(scriptName);
player.Play(script, player.PlaybackSpot.LineIndex, player.PlaybackSpot.InlineIndex);
playedLineHashes = prevLineHashes;
}
var lastPlayedLineIndex = (player.PlayedCommand ?? player.Playlist.Last()).PlaybackSpot.LineIndex;
// Find the first modified line in the updated script (before the played line).
var rollbackIndex = -1;
for (int i = 0; i < lastPlayedLineIndex; i++)
{
if (!player.PlayedScript.Lines.IsIndexValid(i)) // The updated script ends before the currently played line.
{
rollbackIndex = player.Playlist.GetCommandBeforeLine(i - 1, 0)?.PlaybackSpot.LineIndex ?? 0;
break;
}
var oldLineHash = playedLineHashes[i];
var newLine = player.PlayedScript.Lines[i];
if (oldLineHash.EqualsFast(newLine.LineHash))
{
continue;
}
rollbackIndex = player.Playlist.GetCommandBeforeLine(i, 0)?.PlaybackSpot.LineIndex ?? 0;
break;
}
if (rollbackIndex > -1) // Script has changed before the played line.
// Rollback to the line before the first modified one.
{
await stateManager.RollbackAsync(s => s.PlaybackSpot.LineIndex == rollbackIndex);
}
// Update the playlist and play.
var resumeLineIndex = rollbackIndex > -1 ? rollbackIndex : lastPlayedLineIndex;
var playlist = new ScriptPlaylist(player.PlayedScript, scriptManager);
var playlistIndex = player.Playlist.FindIndex(c => c.PlaybackSpot.LineIndex == resumeLineIndex);
player.Play(playlist, playlistIndex);
if (player.WaitingForInput)
{
player.SetWaitingForInputEnabled(false);
}
}