Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog.

[Unreleased]

Added

Changed

Fixed an issue where, on Windows, projects would fail to automatically update when a file that belonged to them was created or edited.

Removed

[2.4.2] 2024-02-24

Added

Added a Unity Project scoped settings that allows you to override some of the default behaviours of Yarn Spinner.
- Yarn Spinner settings are saved to the path ProjectSettings\Packages\dev.yarnspinner\YarnSpinnerProjectSettings.json.
- The settings be changed in the Project Settings window, by choosing Edit -> Project Settings -> Yarn Spinner.
- The setting currently supports three convenience features of Yarn Spinner:
  - Automatically associating assets with localisations
  - Automatically linking YarnCommand and YarnFunction attributed methods to the Dialogue Runner.
  - Generating a .ysls.json file that stores information about your Yarn attributed methods.
    - This file is saved to ProjectSettings\Packages\dev.yarnspinner\generated.ysls.json.
    - This is an experimental feature to support better editor integration down the line. As such, this feature defaults to 'off'.
- Enabling or disabling YarnCommand and YarnFunction linking, or .ysls generation, will cause your project to recompile.
- Enabling or disabling asset linking will cause a reimport of all yarnproject assets.
Yarn.Unity.ActionAnalyser.Action now has a MethodIdentifierName property, which is the short form of the method name.
DialogueAdvanceInput now supports Virtual Button names in addition to KeyCodes and Input Actions.
- This can be configured to work on button or key release or press. By default, the component works on release.
LineView now will add in line breaks when it encounters a self closing [br /] marker.
Yarn attributed Functions and Commands can now use constant values in addition to literals for their name.

Changed

Update the minimum Unity version to 2021.3.
Fixed a bug where line pauses could sometimes not happen when the user's framerate is low.
Fixed a bug where the Rounded Views sample wouldn't import correctly.
Fixed Minimal Dialogue Runner sample that was using obsolete methods.
Fixed a bug where TMPShim wasn't being detected.
Standard library functions (like random, dice, round_places, etc) have been moved to the core Yarn Spinner library.
Fixed a bug where the audio assets in the samples weren't being linked correctly resulting in playback errors.
Intro Sample: Moved the Character Color view to a new stand-alone object (it's easier to explain how to do this in a tutorial!)
Analyser no longer ignores non-public methods.
- This is now handled during codegen side so we can better log it.
ActionsGenerator will now generate C# warnings for non-private methods that are attributed as YarnFunction or YarnCommand.
ActionsGenerator still logs to a temporary location, but now into a dev.yarnspinner.logs folder inside the temporary location.
Auto-advancing LineViews will no longer attempt to advance dialogue that has been stopped.
Actions Registration now dumps generated code into the same temporary folder the logs live in
ActionsGenerator will now generate C# warnings for incorrectly named methods that are attributed as YarnFunction or YarnCommand.
Fixed a bug where AudioLineProvider didn't allow runtime changing of the text locale.
Fixed a bug where the Unity Localisation strings tables would have duplicate lines after tagging all lines in a project.

Removed

Remove certain items that were previously marked as obsolete:
- Obsolete method DialogueRunner.ResetDialogue
- Obsolete property YarnFunctionAttribute.FunctionName
- Obsolete property YarnCommandAttribute.CommandString
- Obsolete method YarnProject.GetProgram

[2.4.1] 2024-01-30

Version 2.4.1 is the first release of the paid version of Yarn Spinner on the Unity Asset Store and on itch.io. It's identical to v2.4.0.
Yarn Spinner is and will remain free and open source - we also make it available for purchase as an excellent way to support the team.
While you're reading, why not consider our paid add-ons, which add some fantastic and easy-to-customise dialogue views?

[2.4.0] 2023-11-15

Added

In-Line Pause Support

The built-in Line View now can now identify markup based pauses and insert pauses into the typewriter effect.
- To use this you can use the pause markup inside your lines:
```
Alice: wow this line now has a halt [pause=500 /] inside of it
```
  - This line will stop the typewriter for 500ms after the halt is shown. After the 500ms delay, the rest of the line will appear.
- Two new Unity events have also been added to be informed when pauses happen:
  - onPauseStarted
  - onPauseEnded
Added a new PausableTypewriter effect that works identically to the existing Typewriter effect, but supports arbitrary pauses. This effect can be used in your own custom line views to add support for the [pause/] markup.
To learn more about how the pause system works, take a look at the PausableTypewriter.GetPauseDurationsInsideLine method!

New Samples

Several new sample projects have been added:
- Shot Reverse Shot shows how you can use Cinemachine virtual cameras and custom dialogue views to make a shot-reverse-shot scene in your game.
- Sliced Views shows off a new alternative default line and option view prefab.
- Markup Palette demonstrates the new MarkupPalette system.
- User Input and Yarn shows how you can use blocking commands and TMP Input fields to get input into Yarn variables.
- Pausing the Typewriter howing how you can use the [pause/] marker to temporarily pause in the middle of a line.

New Saving Features

Added two new basic save methods on DialogueRunner that use the persistent data storage location as their save location:
- SaveStateToPersistentStorage saves all variables known to the Dialogue Runner to a named file in the Application.persistentDataPath folder.
  - These methods, SaveStateToPersistentStorage and LoadStateFromPersistentStorage are intended to replace the older PlayerPref based system for basic saves.
  - Note: For more complex games, we are still assuming you will need to craft your own bespoke save system.

Markup Palette System

The Line View and Options List View prefabs now support markup palettes, which allow you to customise the colours of your lines and options using Yarn Spinner's markup.
Markup Palettes let you associate a marker with a colour. When you use that marker in your dialogue, the text will be rendered using that colour.
For example, consider the following line:
```
I'm [excited]thrilled to be here[/excited]!
```
If you create a Markup Palette that links the word excited to the colour red, the words "thrilled to be here" will be red.
The built-in Line View and Options List View prefabs have support for Markup Palettes, as well as any custom Dialogue Views you build that use the LineView and OptionsListView classes.

Other Features

A new method (ClearLoadedAssets), which unloads all cached assets from the UnityLocalisedLineProvider, has been added.
- This method will forcibly unload all assets. Only call this method if you're very familiar with the Addressable Assets system and are comfortable with Yarn Spinner's internals!
Projects can now provide a list of line IDs within a node, using GetLineIDsForNodes.
- This is intended to be used to precache multiple nodes worth of assets, but might also be useful for debugging during development.
Newly created .yarnproject files now ignore any .yarn files that are in a folder whose name ends in '~', which follows Unity's behaviour.
- You can customise this behaviour by opening the .yarnproject file in a text editor and modifying the excludeFiles property.
Added MarkupPalette scriptable object and support for the palette inside of LineView and OptionsListView and associated OptionView.
- This is useful both as a standalone way to easily annotate your dialogue, but also as an example of the markup system.

Changed

Fixed a bug where YarnNode attributes would not display correctly in the Inspector when its property path is longer than 1.
Fixed a bug in the action registration source code generator that caused it to crash on certain files, which resulted in some commands not being registered at runtime.
Replaced the call to Yarn.Compiler.Utility.AddTagsToLines with Yarn.Compiler.Utility.TagLines.
Fixed incorrect order of generic parameter names for AddFunction methods. The usage of these functions is unchanged.
Fixed incorrect handling of line IDs inside the Unity Localised Line Provider preventing voice assets being loaded.
Fixed a crash where declaration statements without a value (<<declare $var>>) would crash the importer, leading to weird bugs.
Yarn Functions and Commands can now have up to 10 parameters if you need them. (Previously, the limit was 6.)
The hard dependency on Text Mesh Pro is now a soft one.
- This change will only affect projects that do not have TextMeshPro installed in their project. For most projects, this change won't be noticed.
Dialogue Runner will now better wait for line providers to be ready before requesting lines.
- This does have the potential issue of long load times for some larger nodes, in those cases we suggest you preload more lines using GetLineIDsForNodes on YarnProject
UnityLocalisedLineProvider can now have its default setting of removing unused assets disabled, this is useful when caching multiple nodes worth of assets
The "Add Assets to Asset Table Collection" wizard now correctly prepends line: to the key, to match the documented behaviour.
OptionsListView now deactivates child options when they are not needed instead of just making them transparent.
When using Unity Localization, line metadata is now stored on the shared entry for a line ID, rather than only on the base language's entry. (This caused an issue where, if the game was not running in the base language, line metadata would not be available.)
Fixed an issue with AudioLineProvider that would prevent audio assets being loaded
Fixed an issue with the Project editor that prevented audio assets loading when using Addressables.
The Yarn Project inspector window will now log errors when your inspector width is considered too small.
- We are pretty sure this is a bug in the UI code on Unity's end.
- In our testing it happens at widths less than 319 pixels, because, sure, why not!
- It also doesn't seem to happen in every version of Unity, so that's fun.
Setting a project on the dialogue runner will now also load the initial variables from this project, fixing this regression.
LineView now supports showing the character names as a standalone element.
- The existing behaviour is still the same with the default prefabs
OptionsListView now supports showing the character names as a standalone element.
LineView now uses the PausableTypewriter by default.
- If you don't use pauses, you won't need to change anything.
Effects.Typewriter now is a wrapper into the PausableTypewriter effect
- If you don't use pauses nothing will change
Yarn Projects that have no import data will no longer suggest to upgrade the project file.
- This solves an uncommon but very hard to debug error!
YarnProjectImporterEditor.CreateUpgradeUI is now private.
The Yarn Project editor 'upgrade' help link now correctly links to the upgrade page on the docs.

Removed

Deprecated SaveStateToPlayerPrefs and LoadStateFromPlayerPrefs.
- Please use SaveStateToPersistentStorage and LoadStateFromPersistentStorage instead.
The Actions class will no longer log every single time a command is registered.
Removed YarnLinesAsCanvasText class and associated elements, this didn't do anything and was using an approach that is no longer advisable.
- The MainMenu sample is now gone, this code was not in the package and didn't work, so it is unlikely anyone will notice this has been removed.
Removed the deprecated code inside YarnProjectImporterEditor.
The Addressable sample has been removed for now as it isn't well suited as an example of using Yarn Spinner and Addressables. It will return in a future release of Yarn Spinner.

[2.3.1] 2023-07-07

Added

Added the ability to add, modify, and delete source file patterns for Yarn projects in the Inspector.

Changed

Calling Stop on the Dialogue Runner will now also dismiss the LineView, OptionListView, and VoiceOverView.

[2.3.0-beta2] 2023-05-17

Added

The YarnScriptTemplate.txt now has a newline at the end of the file.
The .yarnproject importer has been updated to use new JSON-formatted Yarn Projects.
- JSON-formatted Yarn Projects replace the previous format, which stored all import data in Unity's .meta files.
- JSON-formatted Yarn Projects allow a single Yarn script to be used in multiple Yarn Projects, and also allow the Yarn Spinner compiler to support upcoming new features.
- Yarn scripts no longer need to be manually associated with a Yarn Project. If they are in the same folder, or a subfolder, of the Yarn Project, they will be included.
- When you update to 2.3.0-beta2, all Yarn scripts and Yarn Projects will be re-imported.
  - You will receive import errors on your existing Yarn Projects, telling you that your Yarn Project needs to be upgraded. To do this, follow the message's instructions: select the project, and click Upgrade Yarn Project in the Inspector.
  - After upgrading your projects, you will need to set up your localisations again by adding them in the Yarn Project's inspector and dragging in your strings file and asset file.
  - If your project uses any Yarn files that are not in the same folder, or subfolder, of the Yarn Project, you will need to move the Yarn files to the folder.
  - Your Yarn scripts, strings files, and localised assets will not be modified, and you won't need to change any objects in your scenes or prefabs. The only thing that will be changed is the Yarn Project file.
The Unity Localization integration is now available when the Localization package is installed.
- Prior to this change, the YARN_USE_EXPERIMENTAL_FEATURES scripting definition symbol needed to be added to the Player settings.
You can now add a Dialogue System prefab to your scene by opening the GameObject menu and choosing Yarn Spinner -> Dialogue Runner.
Added 'On Dialogue Start' event to Dialogue Runner. This event is called when the dialogue starts running. (@nrvllrgrs)

Changed

TextMeshPro dependency is now optional. Example dialogue views will not function properly without TMP. As of 2023.2.0a14 TMP has been merged into UGUI.
Added code to invalidate the Program cache on awake for Yarn Projects properly. This means your Yarn Projects will be correctly compiled and referenced in the editor.
Dialogue Runner will now report an error and stop early if you tell it to start running a node that isn't in the provided Yarn Project.
Dialogue Runner's 'On Dialogue Complete' event will now fire when you stop it via by calling the Stop() method.

Removed

[2.3.0-beta1] 2023-03-06

Added

Methods tagged with the YarnCommand and YarnFunction attribute are now discovered at compile time, rather than at run-time. This makes game start-up significantly faster.
- Yarn Spinner for Unity will search your source code for methods with the YarnCommand and YarnFunction attributes, and generate source code that registers these methods when the game starts up, or when you enter Play Mode in the editor.
  
  This is a change from previous versions of Yarn Spinner for Unity, which searched for commands and functions at run-time, which had performance and compatibility implications on certain platforms (notably, consoles).
  
  This search is done automatically in Unity 2021.2 and later. In earlier versions of Unity, you will need to manually tell Yarn Spinner for Unity to check your code, by opening the Window menu and choosing Yarn Spinner -> Update Yarn Commands.
In Unity 2021.2 and later, you can now see which commands have been registered using YarnCommand by opening the Window menu and choosing Yarn Spinner -> Commands...
DialogueReference objects can now be implicitly converted to strings.

The YarnNode attribute can be attached to a string property to turn it into a drop-down menu for choosing nodes in a Yarn Project.

 // A reference to a Yarn Project
public YarnProject project;

// A node in 'project'
[YarnNode(nameof(project))]
public string node1;

// Another node in 'project'
[YarnNode(nameof(project))]
public string node2;

The YarnProject.GetHeaders method has been added, which fetches all headers for a node.
The YarnProject.InitialValues property has been added, which fetches a dictionary containing the initial values for every variable in the project.

Changed

Fixed a compile error in the Minimal Viable Dialogue System sample in Unity 2019.

[2.2.4] 2023-01-27

Changed

Number pluralisation rules have been updated. The rules have now use CLDR version 42.0 (previously, 36.1)
Fixed an issue where pluralisation markup (i.e. the plural and ordinal tags) would not work correctly with country-specific locales (for example "en-AU").

[2.2.3] 2022-11-14

Changed

Dependency DLLs are now aliased to prevent compilation errors with Burst.
- In v2.2.2, Yarn Spinner's dependency DLLs were renamed to have the prefix Yarn. to prevent errors when two DLLs of the same name (e.g. Google.Protobuf.dll) are present in the same project.
- This fix solved the edit-time problem, but introduced a new error when the project used Unity's Burst compiler, which looks for DLL files based on their assembly name.
- When compiling with Burst, Unity looks for the DLL file based on the name of the assembly, so when it goes searching for (for example) Google.Protobuf, it will only look for the file Google.Protobuf.dll, and not the renamed file.
- With this change, the update_dlls.yml build script, which pulls in the latest version of Yarn Spinner and its dependencies, now uses the dotnet-assembly-alias tool to rename the DLLs and their assembly names.

[2.2.2] 2022-10-31

Added

The DialogueReference class, which stores a reference to a named node in a given project (and shows a warning in the Inspector if the reference can't be found) has been added. Thanks to @sttz for the contribution!
Initial work on support for the Unity Localization system has been added.
- These features are currently behind a feature flag. They are not yet considered ready for production use, and we aren't offering support for it yet.
- To access them, add the scripting define symbol YARN_ENABLE_EXPERIMENTAL_FEATURES. You should only do this if you know what this involves.
- Yarn Project importer now has initial support for Unity's Localization system.
- A new localised line provider subclass, UnityLocalisedLineProvider.cs has been added.

Changed

Fixed interrupt token handling in VoiceOverView that would cause it to permanently stop a Dialogue Runner's ability to progress through dialogue lines.
Fixed an issue where lines and options that contain invalid markup would cause an exception to be thrown, breaking dialogue. A warning message is now logged instead, and the original text of the line (with any invalid markup present) is delivered.
Fixed a compiler error that made Yarn Spinner fail to compile on Unity 2020.1.
The AddCommandHandler(string name, Delegate handler) and AddFunction(string name, Delegate handler) methods on DialogueRunner are now public.
- These methods allow you to register a Delegate object as a command or function.
  
  Note: We recommand that you use the pre-existing AddCommandHandler and AddFunction methods that take System.Action or System.Func parameters unless you have a very specific reason for using this, as the pre-existing methods allow the compiler to do type-checking on your command and function implementations.
Fixed an issue that would cause compilation errors if a Unity project using Yarn Spinner also used a DLL with the same name as one of Yarn Spinner's dependencies (for example Google Protocol Buffers).
- The dependency DLLs that come with Yarn Spinner (for example, Antlr.Runtime, Google.Probuf, and others) have been renamed to have the prefix Yarn., and the assembly definition files for Yarn Spinner have been updated to use the renamed files.
- Huge thanks to @Sygan for finding and describing the fix for this problem!
The YarnProject.GetProgram() method has been replaced with a property, Program.
- GetProgram() still exists, but has been marked as obsolete and will be removed in a future release of Yarn Spinner.
- YarnSpinner.Program has better performance, because it caches the result of de-serializing the compiled Yarn Program.

[2.2.1] 2022-06-14

Changed

Fixed an issue where Yarn projects that made use of the visited or visit_count functions could produce errors when re-importing the project.

[2.2.0] 2022-04-08

Added

A simple, built-in system for saving and loading Yarn variables to the built-in PlayerPrefs object has been added.
- Call DialogueRunner.SaveStateToPlayerPrefs to save all variables to the PlayerPrefs system, and DialogueRunner.LoadStateFromPlayerPrefs to load from PlayerPrefs into the variable storage.
- These methods do not write to file (except via PlayerPrefs, which handles disk writing on its own), and only work with variables (and not information like which line is currently being run.)
Metadata for each line is exposed through a Yarn Project. Metadata generally comes as hashtags similar to #line. They can be used to define line-specific behavior (no particular behavior is supported by default, each user will need to define their own).
When exporting Strings files, a Yarn Project will also export another CSV file with the line metadata (for each line with metadata).
LocalizedLines now contain a field for any metadata associated with the line.
YarnFunction tagged methods now appear in the inspector window for the project, letting you view their basic info.

Changed

YarnPreventPlayMode no longer uses WeakReference pointing to Unity.Object (this is unsupported by Unity).
ActionManager no longer logs every single command that it registers. (#165)
Line view should no longer have unusual interactions around enabling and disabling different effects (#161 and #153).
Improved the type inference system around the use of functions.
Fixed exception when viewing a Yarn Project in the inspector that contains no declarations, in Unity 2021.2 and earlier (#168)

This has two pieces, the first is in YarnSpinner Core and adds in support for partial backwards type inference. This means in many situations where either the l-value or r-value of an expression is known that can be used to provide a type to the other side of the equation. Additionally now functions tagged with the YarnFunction attribute are sent along to the compiler so that they can be used to inform values. The upside of this is in situations like <<set $cats = get_cats()>> if either $cats is declared or get_cats is tagged as a YarnFunction there won't be an error anymore.

Removed

The SerializeAllVariablesToJSON and DeserializeAllVariablesFromJSON methods have been removed.
- If you need a simple way to save all variables, use DialogueRunner.SaveStateToPlayerPrefs and DialogueRunner.LoadStateFromPlayerPrefs instead, which save directly to Unity's PlayerPrefs system and don't require reading or writing files.
- If your saving or loading needs are more complex, use the VariableStorageBehaviour class's GetAllVariables() and SetAllVariables() methods to get and set the value of all values at once, and handle the serialization and deserialization the way your game needs it.

[2.1.0] 2022-02-17

Dialogue View API Update

The API for creating new Dialogue Views has been updated.

Background: Dialogue Views are objects that receive lines and options from the Dialogue Runner, present them to the player, receive option selections, and signal when the user should see the next piece of content. They're subclasses of the DialogueViewBase class. All of our built-in Dialogue Views, such as LineView and OptionsListView, are examples of this.

Previously, line objects stored information about their current state, and as Dialogue Views reported that they had finished presenting or dismissing their line, all views would receive a signal that the line's state had changed, and respond to those changes by changing the way that the line was presented (such as by dismissing it when the line's state became 'Dismissed'). This meant that every Dialogue View class needed to implement fairly complex logic to handle these changes in state.

In this release, 'line state' is no longer a concept that Dialogue Views need to keep track of. Instead, Dialogue Views that present lines simply need to implement three methods:

RunLine is called when the Dialogue Runner wants to show a line to the player. It receives a line, as well as a completion handler to call when the line view has finished delivering the contents line.
InterruptLine is called when the Dialogue Runner wants all Dialogue Views to finish presenting their lines as fast as possible. It receives the line that's currently being presented, as well as a new completion handler to call when the presentation is finished (which this method should try and call as quickly as it can.)
DismissLine is called when all Dialogue Views have finished delivering their line (whether it was interrupted, or whether it completed normally). It receives a completion handler to call when the dismissal is complete.

The updated flow is this:

While running a Yarn script, the Dialogue Runner encounters a line of dialogue to show to the user.
It calls RunLine on all Dialogue Views, and waits for all of them to call their completion handler to indicate that they're done presenting the line.

At any point, a Dialogue View can call a method that requests that the current line be interrupted. When this happens, the Dialogue Runner calls InterruptLine on the Dialogue Views, and waits for them to call the new completion handler to indicate that they've finished presenting the line.

Once all Dialogue Views have reported that they're done, the Dialogue Runner calls DismissLine on all Dialogue Views, and waits for them to call the completion handler to indicate that they're done dismissing the line.
The Dialogue Runner then moves on to the next piece of content.

This new flow significantly simplifies the amount of information that a Dialogue View needs to keep track of, as well as the amount of logic that a Dialogue View needs to have to manage this information.

Instead, it's a simpler model of: "when you're told to run a line, run it, and tell us when you're done. When you're told to interrupt the line, finish running it ASAP and tell us when you're done. Finally, when you're told to dismiss your line, do it and let us know when you're done."

We've also moved the user input handling code out of the built-in LineView class, and into a new class called DialogueAdvanceInput. This class lets you use either of the Unity Input systems to signal to a DialogueView that the user wants to advance the dialogue; by moving it out of our built-in view, it's a little easier for Dialogue View writers, who may not want to have to deal with input.

This hopefully alleviates some of the pain points in issues relating to how Dialogue Views work, like issue #95.

There are no changes to how options are handled in this new API.

Jump to Expressions

The <<jump>> statement can now take an expression.

<<set $myDestination = "Home">>
<<jump {$myDestination}>>

Previously, the jump statement required the name of a node. With this change, it can now also take an expression that resolves to the name of a node.
Jump expressions may be a constant string, a variable, a function call, or any other type of expression.
These expressions must be wrapped in curly braces ({ }), and must produce a string.

Added

Added a new component, DialogueAdvanceInput, which responds to user input and tells a Dialogue View to advance.
Added DialogueViewBase.RunLine method.
Added DialogueViewBase.InterruptLine method.
Added DialogueViewBase.DismissLine method.

Changed

Updated to Yarn Spinner Core 2.1.0.
Updated DialogueRunner to support a new, simpler API for Dialogue Views; lines no longer have a state for the Dialogue Views to respond to changes to, and instead only receive method calls that tell them what to do next.
Fixed a bug where changing a Yarn script asset in during Play Mode would cause the string table to become empty until the next import (#154)
Fixed a bug where Yarn functions outside the default assembly would fail to be loaded.

Removed

Removed LineStatus enum.
Removed DialogueViewBase.OnLineStatusChanged method.
Removed DialogueViewBase.ReadyForNextLine method.
Removed VoiceOverPlaybackFmod class. (This view was largely unmaintained, and we feel that it's best for end users to customise their FMOD integration to suit their own needs.)
Renamed VoiceOverPlaybackUnity to VoiceOverView.

[2.0.2] 2022-01-08

Added

You can now specify which assemblies you want Yarn Spinner to search for YarnCommand and YarnFunction methods in.
- By default, Yarn Spinner will search in your game's code, as well as every assembly definition in your code and your packages.
- You can choose to make Yarn Spinner only look in specific assembly definitions, which reduces the amount of time needed to search for commands and functions.
- To control how Yarn Spinner searches for commands and actions, turn off "Search All Assemblies" in the Inspector for a Yarn Project.
Added a Spanish translation to the Intro sample.

Changed

ActionManager now only searches for commands and actions in assemblies that Yarn Projects specify. This significantly reduces startup time and memory usage.
Improved error messages when calling methods defined via the YarnCommand attribute where the specified object can't be found.

[2.0.1] 2021-12-23

Added

The v1 to v2 language upgrader now renames node names that have a period (.) in their names to use underscores (_) instead. Jumps and options are also updated to use these new names.

Changed

Fixed a crash in the compiler when producing an error message about an undeclared function.
Fixed an error when a constant float value (such as in a <<declare>> statement) was parsed and the user's current locale doesn't use a period (.) as the decimal separator.

[2.0.0-rc1] 2021-12-13

Added

Command parameters can now be grouped with double quotes. eg. <<add-recipe "Banana Sensations"> and <<move "My Game Object" LocationName>> (@andiCR)
You can now add dialogue views to dialogue runner at any time.
The inspector for Yarn scripts now allows you to change the Project that the script belongs to. (@radiatoryang)
Yarn script compile errors will prevent play mode.
Default functions have been added for convenience.
- float random() - returns a number between 0 and 1, inclusive (proxies Unity's default prng)
- float random_range(float, float) - returns a number in a given range, inclusive (proxies Unity's default prng)
- int dice(int) - returns an integer in a given range, like a dice (proxies Unity's default prng)
  - For example, dice(6) + dice(6) to simulate two dice, or dice(20) for a D20 roll.
- int round(float) - rounds a number using away-from-zero rounding
- float round_places(float, int) - rounds a number to n digits using away-from-zero rounding
- int floor(float) - floors a number (towards negative infinity)
- int ceil(float) - ceilings a number (towards positive infinity)
- int int(float) - truncates the number (towards zero)
- int inc(float | int) - increments to the next integer
- int dec(float | int) - decrements to the previous integer
- int decimal(float) - gets the decimal portion of the float

The YarnFunction attribute has been added.

Simply add it to a static function, eg

[YarnFunction] // registers function under "example"
public static int example(int param) {
  return param + 1;
}

[YarnFunction("custom_name")] // registers function under "custom_name"
public static int example2(int param) {
  return param * param;
}

The YarnCommand attribute has been improved and made more robust for most use cases.

You can now leave the name blank to use the method name as the registration name.

[YarnCommand] // like in previous example with YarnFunction.
void example(int steps) {
  for (int i = 0; i < steps; i++) { ... }
}

[YarnCommand("custom_name")] // you can still provide a custom name if you want
void example2(int steps) {
  for (int i = steps - 1; i >= 0; i--) { ... }
}

It now recognizes static functions and does not attempt to use the first parameter as an instance variable anymore.

[YarnCommand] // use like so: <<example>>
static void example() => ...;

[YarnCommand] // still as before: <<example2 objectName>>
void example2() => ...;

You can also define custom getters for better performance.

[YarnStateInjector(nameof(GetBehavior))] // if this is null, the previous behavior of using GameObject.Find will still be available
class CustomBehavior : MonoBehaviour {
  static CustomBehavior GetBehavior(string name) {
    // e.g., it may only exist under a certain transform, or you have a custom cache...
    // or it's built from a ScriptableObject...
    return ...;
  }

  [YarnCommand] // the "this" will be as returned from GetBehavior
  void example() => Debug.Log(this);

  // special variation on getting behavior
  static CustomBehavior GetBehaviorSpecial(string name) => ...;

  [YarnCommand(Injector = nameof(GetBehaviorSpecial))]
  void example_special() => Debug.Log(this);
}

You can also define custom getters for Component parameters in the same vein.

class CustomBehavior : MonoBehaviour {
  static Animator GetAnimator(string name) => ...;

  [YarnCommand]
  void example([YarnParameter(nameof(GetAnimator))] Animator animator) => Debug.Log(animator);
}

You should continue to use manual registration if you want to make an instance function (ie where the "target" is defined) static.

Sample scenes now have a render pipeline detector gameobject that will warn when the sample scene materials won't look correct in the current render pipeline.
Variables declared inside Yarn scripts will now have the default values set into the variable storage.

Changed

Updated to support new error handling in Yarn Spinner.
- Yarn Spinner longer reports errors by throwing an exception, and instead provides a collection of diagnostic messages in the compiler result. In Unity, Yarn Spinner will now show all error messages that the compiler may produce.
The console will no longer report an error indicating that a command is "already defined" when a subclass of a MonoBehaviour that has YarnCommand methods exists.
LocalizedLine.Text's setter is now public, not internal.
DialogueRunner will now throw an exception if a dialogue view attempts to select an option on the same frame that options are run.
DialogueRunner.VariableStorage can now be modified at runtime.
Calling DialogueRunner.StartDialogue when the dialogue runner is already running will now result in an error being logged.
Line Views will now only enable and disable action references if the line view is also configured to use said action.
Yarn Project importer will now save variable declaration metadata on the first time

Removed

Support for Unity 2018 LTS has been dropped, and 2019 LTS (currently 2019.4.32f1) will be the minimum supported version. The support scheme for Yarn Spinner will be clarified in the CONTRIBUTING docs. If you still require support for 2018, please join our Discord!

[2.0.0-beta5] 2021-08-17

Added

InMemoryVariableStorage now throws an exception if you attempt to get or set a variable whose name doesn't start with $.
LineView now has an onCharacterTyped event that triggers for each character typed in the typewriter effect.

Changed

OptionsListView no longer throws a NullPointerException when the dialogue starts with options (instead of a line.)
When creating a new Yarn Project file from the Assets -> Create menu, the correct icon is now used.
Updated to use the new type system in Yarn Spinner 2.0-beta5.

Removed

Yarn Programs: The 'Convert Implicit Declarations' button has been temporarily removed, due to a required compatibility change related to the new type system. It will be restored before final 2.0 release.

[2.0.0-beta4] 2021-04-01

Yarn Spinner 2.0 Beta 4 is a hotfix release for Yarn Spinner 2.0 Beta 3.

Changed

Fixed an issue that caused Yarn Spinner to not compile on Unity 2018 or Unity 2019.

[2.0.0-beta3] 2021-03-27

Added

The dialogue runner can now be configured to log less to the console, reducing the amount of noise it generates there. (@radiatoryang)
Warning messages and errors now appear to help users diagnose two common problems: (1) not adding a Command properly, (2) can't find a localization entry for a line (either because of broken line tag or bad connection to Localization Database) (@radiatoryang)
Made options that have a line condition able to be presented to the player, but made unavailable.
This change was made in order to allow games to conditionally present, but disallow, options that the player can't choose. For example, consider the following script:

TD-110: Let me see your identification.
-> Of course... um totally not General Kenobi and the son of Darth Vader.
    Luke: Wait, what?!
    TD-110: Promotion Time!
-> You don't need to see his identification. <<if $learnt_mind_trick is true>>
    TD-110: We don't need to see his identification.

If the variable $learnt_mind_trick is false, a game may want to show the option but not allow the player to select it (i.e., show that this option could have been chosen if they'd learned how to do a mind trick.)
In previous versions of Yarn Spinner, if a line condition failed, the entire option was not delivered to the game. With this change, all options are delivered, and the OptionSet.Option.IsAvailable variable contains false if the condition was not met, and true if it was (or was not present.)
The DialogueUI component now has a "showUnavailableOptions" option that controls the display behaviour of unavailable options. If it's true, then unavailable options are presented, but not selectable; if it's false, then unavailable options are not presented at all (i.e. same as Yarn Spinner 1.0.)
Audio for lines in a Localization object can now be previewed in the editor. (@radiatoryang)
Lines can be added to a Localization object at runtime. They're only stored in memory, and are discarded when gameplay ends.
Commands that take a boolean parameter now support specifying that parameter by its name, rather than requiring the string true.
For example, if you have a command like this:

  [YarnCommand("walk")]
  void WalkToPoint(string destinationName, bool wait = false) {
    // ...
  }

Previously, you'd need to use this in your Yarn scripts:

<<walk MyObject MyDestination true>>

With this change, you can instead say this:

<<walk MyObject MyDestination wait>>

New icons for Yarn Spinner assets have been added.
New dialogue views, LineView and OptionListView, have been added. These are intended to replace the previous DialogueUI, make use of TextMeshPro for text display, and allow for easier customisation through prefabs.
DialogueRunners will now automatically create and use an InMemoryVariableStorage object if one isn't provided.
The Inspector for DialogueRunner has been updated, and is now easier to use.

Changed

Certain private methods in DialogueUI have changed to protected, making it easier to subclass (@radiatoryang)
Fixed an issue where option buttons from previous option prompts could re-appear in later prompts (@radiatoryang)
Fixed an issue where dialogue views that are not enabled were still being waited for (@radiatoryang)
Upgrader tool now creates new files on disk, where needed (for example, .yarnproject files)
YarnProgram, the asset that stores references to individual .yarn files for compilation, has been renamed to YarnProject. Because this change makes Unity forget any existing references to "YarnProgram" assets, when upgrading to this version, you must set the Yarn Project field in your Dialogue Runners again.
Localization, the asset that mapped line IDs to localized data, is now automatically generated for you by the YarnProject.
- You don't create them yourselves, and you no longer need to manually refresh them.
- The YarnProject always creates at least one localization: the "Base" localization, which contains the original text found in your .yarn files.
- You can create more localizations in the YarnProject's inspector, and supply the language code to use and a .csv file containing replacement strings.
Renamed the 'StartHere' demo to 'Intro', because it's not actually the first step in installing Yarn Spinner.
Simplified the workflow for working with Addressable Assets.
- You now import the package, enable its use on your Yarn Project, and click the Update Asset Addresses button to ensure that all assets have an address that Yarn Spinner knows about.
The 3D, VisualNovel, and Intro examples have been updated to use the new LineView and OptionsListView components, rather than DialogueUI.
DialogueRunner.ResetDialogue is now marked as Obsolete (it had the same effect as just calling StartDialogue anyway.)
The LineStatus enum's values have been renamed, to better convey their purpose:
- Running is now Presenting.
- Interrupted remains the same.
- Delivered is now FinishedPresenting.
- Ended is now Dismissed .
The ResetDialogue() method now takes an optional parameter to restart from. If none is provided, the dialogue runner attempts to restart from the start node, followed by the current node, or else throws an exception.
DialogueViewBase.MarkLineComplete, the method for signalling that the user wants to interrupt or proceed to the next line, has been renamed to ReadyForNextLine.
DialogueRunner.continueNextLineOnLineFinished has been renamed to automaticallyContinueLines.

Removed

LocalizationDatabase, the asset that stored references to Localization assets and manages per-locale line lookups, has been removed. This functionality is now handled by YarnProject assets. You no longer supply a localization database to a DialogueRunner or to a LineProvider - the work is handled for you.
AddressableAudioLineProvider has been removed. AudioLineProvider now works with addressable assets, if the package is installed and your Yarn Project has been configured to use them.
You no longer specify a list of languages available to your project in the Preferences menu or in the project settings. This is now controlled from the Yarn Project.
The StartDialogue() method (with no parameters) has been removed. Instead, provide a node name to start from when calling StartDialogue(nodeName).

[2.0.0-beta2] 2021-01-14

Added

InMemoryVariableStorage now shows the current state of variables in the Inspector. (@radiatoryang)
InMemoryVariableStorage now supports saving variables to file, and to PlayerPrefs. (@radiatoryang)

Changed

Inline expressions (for example, One plus one is {1+1}) are now expanded.
Added Help URLs to various classes. (@radiatoryang)
The Upgrader window (Window -> Yarn Spinner -> Upgrade Scripts) now uses the updated Yarn Spinner upgrade tools. See Yarn Spinner 2.0.0-beta2 release notes for more information on the upgrader.
Fixed an issue where programs failed to import if a source script reference is invalid
Fixed an issue where the DialogueUI would show empty lines when showCharacterName is false and the line has no character name

Removed

The [[Destination]] and [[Option|Destination]] syntax has been removed from the language.
- This syntax was inherited from the original Yarn language, which itself inherited it from Twine.
- We removed it for four reasons:
  - it conflated jumps and options, which are very different operations, with too-similar syntax;
  - the Option-destination syntax for declaring options involved the management of non-obvious state (that is, if an option statement was inside an if branch that was never executed, it was not presented, and the runtime needed to keep track of that);
  - it was not obvious that options accumulated and were only presented at the end of the node;
  - finally, shortcut options provide a cleaner way to present the same behaviour.
- We have added a <<jump Destination>> command, which replaces the [[Destination]] jump syntax.
- No change to the bytecode is made here; these changes only affect the compiler.
- Instead of using [[Option|Destination]] syntax, use shortcut options instead. For example:

// Before
Kim: You want a bagel?
[[Yes, please!|GiveBagel]]
[[No, thanks!|DontWantBagel]]

// After
Kim: You want a bagel?
-> Yes, please!
  <<jump GiveBagel>>
-> No, thanks!
  <<jump DontWantBagel>>

InMemoryVariableStorage no longer manages 'default' variables (this concept has moved to the Yarn Program.) (@radiatoryang)

[2.0.0-beta1] 2020-10-19

Added

Added a 3D speech bubble sample, for dynamically positioning a speech bubble above a game character. (@radiatoryang)
Added a phone chat sample. (@radiatoryang)
Added a visual novel template. (@radiatoryang)
Added support for voice overs. (@Schroedingers-Cat)
Added a new API for presenting and managing lines of dialogue.
Added a new API for working with localizations.
Added an option to DialogueUI to allow hiding character names.
The Yarn Spinner Window (Window -> Yarn Spinner) now shows the current version of Yarn Spinner.

Changed

Individual .yarn scripts are now combined into a single 'Yarn Program', which is what you provide to your DialogueRunner. You no longer add multiple .yarn files to a DialogueRunner. To create a new Yarn Program, open the Asset menu, and choose Create -> Yarn Spinner -> Yarn Program. You can also create a new Yarn Program by selecting a Yarn Script, and clicking Create New Yarn Program.
Version 2 of the Yarn language requires variables to be declared. You can declare them in your .yarn scripts, or you can declare them in the Inspector for your Yarn Program.
- Variables must always have a defined type, and aren't allowed to change type. This means, for example, that you can't store a string inside a variable that was declared as a number.
- Variables also have a default value. As a result, variables are never allowed to be null.
- Variable declarations can be in any part of a Yarn script. As long as they're somewhere in the file, they'll be used.
- Variable declarations don't have to be in the same file as where they're used. If the Yarn Program contains a script that has a variable declaration, other scripts in that Program can use the variable.
- To declare a variable on a Yarn Program, select it, and click the + button to create the new variable.
- To declare a variable in a script, use the following syntax:

<<declare $variable_name = "hello">> // declares a string
<<declare $variable_name = 123>> // declares a number
<<declare $variable_name = true>> // declares a boolean

Nicer error messages when the localized text for a line of dialogue can't be found.
DialogueUI is now a subclass of DialogueViewBase.
Moved Yarn Spinner classes into the Yarn.Unity namespace, or one of its children, depending on its purpose.
Dialogue.AddFunction now uses functions that can take multiple parameters. You no longer use a single Yarn.Value[] parameter; you can now have up to 5, which can be strings, integers, floats, doubles, bools, or Yarn.Values.
Commands registered via the YarnCommand attribute can now take parameter types besides strings. Parameters can also be optional. Additionally, these methods are now cached, and are faster to call.

Removed

Commands registered via the YarnCommand attribute can no longer accept a params array of parameters. If your command takes a variable number of parameters, use optional parameters instead.

[1.2.7]

Changed

Backported check for Experimental status of AssetImporter (promoted in 2020.2)

[1.2.6]

Note: Versions 1.2.1 through 1.2.5 are identical to v1.2.0; they were version number bumps while we were diagnosing an issue in OpenUPM.

Changed

Fixed compiler issues in Unity 2019.3 and later by adding an explicit reference to YarnSpinner.dll in YarnSpinnerTests.asmdef

[1.2.0] 2020-05-04

This is the first release of v1.2.0 of Yarn Spinner for Unity as a separate project. Previously, this project's source code was part of the Yarn Spinner repository. Version 1.2.0 of Yarn Spinner contains an identical release to this.

Added

Yarn scripts now appear with Yarn Spinner icon. (@Schroedingers-Cat)
Documentation is updated to reflect the current version number (also to mention 2018.4 LTS as supported)
Added a button in the Inspector for .yarn files in Yarn Spinner for Unity, which updates localised .csv files when the .yarn file changes. (@stalhandske, YarnSpinnerTool/YarnSpinner#227)
Added handlers for when nodes begin executing (in addition to the existing handlers for when nodes complete.) (@arendhil, YarnSpinnerTool/YarnSpinner#222)
OptionSet.Option now includes the name of the node that an option will jump to if selected.
Added unit tests for Yarn Spinner for Unity (@Schroedingers-Cat)
Yarn Spinner for Unity: Added a menu item for creating new Yarn scripts (Assets -> Create -> Yarn Script)
Added Nuget package definitions for YarnSpinner and YarnSpinner.Compiler.

Changed

Fixed a crash in the compiler when parsing single-character commands (e.g. <<p>>) (YarnSpinnerTool/YarnSpinner#231)
Parse errors no longer show debugging information in non-debug builds.

Files

CHANGELOG.md

Latest commit

History

CHANGELOG.md

File metadata and controls

Changelog

[Unreleased]

Added

Changed

Removed

[2.4.2] 2024-02-24

Added

Changed

Removed

[2.4.1] 2024-01-30

[2.4.0] 2023-11-15

Added

In-Line Pause Support

New Samples

New Saving Features

Markup Palette System

Other Features

Changed

Removed

[2.3.1] 2023-07-07

Added

Changed

[2.3.0-beta2] 2023-05-17

Added

Changed

Removed

[2.3.0-beta1] 2023-03-06

Added

Changed

[2.2.4] 2023-01-27

Changed

[2.2.3] 2022-11-14

Changed

[2.2.2] 2022-10-31

Added

Changed

[2.2.1] 2022-06-14

Changed

[2.2.0] 2022-04-08

Added

Changed

Removed

[2.1.0] 2022-02-17

Dialogue View API Update

Jump to Expressions

Added

Changed

Removed

[2.0.2] 2022-01-08

Added

Changed

[2.0.1] 2021-12-23

Added

Changed

[2.0.0-rc1] 2021-12-13

Added

Changed

Removed

[2.0.0-beta5] 2021-08-17

Added

Changed

Removed

[2.0.0-beta4] 2021-04-01

Changed

[2.0.0-beta3] 2021-03-27

Added

Changed

Removed

[2.0.0-beta2] 2021-01-14

Added

Changed

Removed

[2.0.0-beta1] 2020-10-19

Added