/// <summary>
/// Creates the new type of the variable based on the given parameters.
/// After getting all of the correct templates, they will be copied
/// into the folder specified by targetPath.
///
/// Some templates must be placed in an Editor folder. If one does not
/// exist, one might be created. However, this function will avoid
/// overwriting files. Once it is done, it will refresh the project.
///
/// Note that not all of the listen exceptions may get thrown. There
/// are others which may get thrown by the file IO methods.
/// </summary>
///
/// <exception cref="System.ArgumentOutOfRangeException">
/// Thrown if any of the arguments are invalid. (See each argument
/// for details.)
/// </exception>
///
/// <exception cref="System.IO.DirectoryNotFoundException">
/// If the targetPath is invalid.
/// </exception>
///
/// <exception cref="System.IO.IOException">
/// Thrown if the Editor folder cannot be created. Also thrown if any
/// of the files we run into a pre-existing file.
/// </exception>
///
/// <param name="metaData">
/// All of the data to use for the new scripts.
///
/// metaData.name: Must be a legal C# name, and must be legal
/// when used as a filename. The first character should be uppercase.
/// If any of the checks fail or if the name is already taken
/// by another variable object, then an ArgumentOutOfRangeException is
/// thrown.
///
/// metaData.type: The name of the pre-existing C# type to be represtented. If
/// the string fails the checks, then an ArgumentOutOfRangeException is thrown.
///
/// metaData.ParsedReferability: Whether the C# type refered to by typeName is
/// a class or a struct. If ReferabilityMode.Unknown is passed,
/// ArgumentOutOfRangeException is thrown.
/// </param>
///
/// <param name="targetPath">
/// Path used when attempting to create the new files. If this isn't a
/// valid path, a DirectoryNotFoundException is thrown. If the
/// target folder is nested in an Editor folder (or is an Editor folder
/// itself), a ArgumentOutOfRangeException is thrown instead.
/// </param>
///
/// <param name="overrideExisting">
/// If true, this will NOT check for scripts which already exist, and will
/// happilly override whatever it finds. This will NOT change GUIDs.
/// </param>
///
/// <returns>A list of all the files created.</returns>
public static List <string> CreateNewVariableType(
ScriptMetaData metaData,
string targetPath,
bool overrideExisting = false
)
{
// This is the path of the editor folder we'll use to dump our
// editor scripts into.
string editorPath = UnityPathUtils.GetEditorFolder(targetPath);
#region Error checking
if (!IsValidName(metaData.name))
{
throw new System.ArgumentOutOfRangeException(
"readableName",
"Either contains invalid characters or could conflict with" +
" a C# keyword."
);
}
else if (ScriptSetManager.IsNameTaken(metaData.name) && !overrideExisting)
{
throw new System.ArgumentOutOfRangeException(
"readableName",
"Is already taken by another VariableObject type."
);
}
else if (!IsValidName(metaData.type))
{
throw new System.ArgumentOutOfRangeException(
"typeName",
"Either contains invalid characters or could conflict with" +
" a C# keyword."
);
}
else if (metaData.ParsedReferability == ReferabilityMode.Unknown)
{
throw new System.ArgumentOutOfRangeException(
"referability",
"Must be something other than ReferabilityMode.unknown."
);
}
else if (!AssetDatabase.IsValidFolder(targetPath) && !Directory.Exists(targetPath))
{
// TODO This seems mildly buggy on Windows. I created a folder
// inside the folder-select prompt and it complained about
// it. Maybe, instead of using AssetDatabase, we should use
// normal C# checks?
throw new DirectoryNotFoundException(
"targetPath must be pointing to a pre-existing folder. If" +
" you want to create a new folder to put the scripts in," +
" you must do it before calling CreateNewVariableType." +
"(Trying to use: " + targetPath + ")"
);
}
else if (UnityPathUtils.IsInEditorAssembly(targetPath))
{
// If we tried putting all of our scripts in an Editor folder,
// it would be mostly pointless because then we cannot use our
// variable objects in the final build.
throw new System.ArgumentOutOfRangeException(
"targetPath",
"Must not be nested in an Editor folder."
);
}
else if (File.Exists(editorPath) && !AssetDatabase.IsValidFolder(editorPath))
{
throw new IOException(
editorPath + " exists as a file, so we cannot make a folder there!"
);
}
#endregion
/*
* At this point, everything is valid. Barring some kind of error
* when writting to the disk, everything should be good to go.
*
* The only thing we are not going to check is if the files already
* exist. We could check this before-hand, but this makes it a bit
* more complex overall. We don't even gain very much in doing this;
* we still need to handle an exception thrown by the file-writing
* code, which may require cleaning up files.
*
* We shall build a list (see newFIlePaths, below) of all of the
* files which we create. That way, we can delete them if something
* goes wrong.
*
*
* Until calling AssetDatabase.Refresh in the finally block,
* we cannot rely on Unity's AssetDatabase class without risking
* the stability of Unity.
*
* If Unity begins a refresh (on its own accord), this process
* occurs asynchroniously. In other words, it may start refreshing
* right in the middle of this function execution.
*
* This is normally okay, but if we catch an exception, we need
* to delete all of the files we created. Deleting files during a
* refresh is risky, and may lead to errors and even lock up
* Unity's reloading mechanisms, halting the Unity Editor.
*
* Fortunately, C# has enough tools to get the job done. Still,
* it's a bit less robust than using the AssetDatabase. Also, we
* cannot set labels until the very end of the process.
*
* (Again, we can't just check ahead of time. There's always risk
* of an exception getting thrown while doing file IO.)
*/
// Used to track the new files we add so that we can clean them up
// if necessary. This is a stack so that the first most recent
// things we create get deleted first.
Stack <string> newFilePaths = new Stack <string>();
try {
// It's still possible that the editor folder doesn't exist.
// However, we are sure that there isn't a file with that name,
// so we can go ahead and create it if necessary.
//
// Note that we're doing this BEFORE locking the assemblies so
// we can still use the AssetDatabase class.
if (!AssetDatabase.IsValidFolder(editorPath))
{
editorPath = AssetDatabase.GUIDToAssetPath(
AssetDatabase.CreateFolder(targetPath, "Editor")
);
// We've created the folder, so it's one of the things
// we'll want to clean up if things go wrong.
newFilePaths.Push(editorPath);
}
EditorApplication.LockReloadAssemblies();
foreach (TemplateInfo template in TemplateFileManager.Templates)
{
string newScriptPath = CreateScriptFromTemplate(
metaData, template, targetPath, editorPath, overrideExisting
);
// CreateScriptFromTemplate CAN return an empty string if
// it chooses not to create a script, so we have to watch for this.
if (!string.IsNullOrEmpty(newScriptPath))
{
newFilePaths.Push(newScriptPath);
}
} // End foreach(TemplateInfo template in Files.Templates)
} // End try
catch (System.Exception e) {
foreach (string path in newFilePaths)
{
if ((File.GetAttributes(path) & FileAttributes.Directory) == FileAttributes.Directory)
{
Directory.Delete(path);
// Possible Unity created a meta file already.
if (File.Exists(path + ".meta"))
{
File.Delete(path + ".meta");
}
}
else
{
File.Delete(path);
}
}
throw e;
}
finally {
EditorApplication.UnlockReloadAssemblies();
AssetDatabase.Refresh();
}
string label = metaData.builtin ? ScriptSetManager.UnityLabel : ScriptSetManager.CustomLabel;
SetFileLabels(newFilePaths.ToArray(), label);
return(new List <string>(newFilePaths));
} // End CreateNewVariableType
private void OnWizardUpdate()
{
string errorMsg = "";
string helpMsg = "";
bool validName = false;
bool validType = false;
// We need to check for null, because the string is occasionally
// null upon wizard's creation
if (string.IsNullOrEmpty(humanReadableName))
{
helpMsg += "Please enter the Human Readable Name.";
}
else if (!VariableTypeBuilder.IsValidName(humanReadableName))
{
errorMsg +=
"The Human Readable Name is not a valid C# variable" +
" name!\n";
}
else if (ScriptSetManager.IsNameTaken(humanReadableName) &&
!(InEditMode && humanReadableName == editTarget.Name)
)
{
errorMsg +=
"The Human Readable Name conflicts with another," +
" already existing variable type!\n";
}
else
{
validName = true;
}
helpMsg += '\n'; // Force push the next line into a blank field.
if (string.IsNullOrEmpty(dataType))
{
helpMsg += "Please enter the Data Type.";
}
else if (!VariableTypeBuilder.IsValidName(dataType))
{
errorMsg += "The Data Type is not a valid C# variable name!";
}
else
{
validType = true;
}
helpMsg += '\n'; // Force push the next line into a blank field.
if (referability == ReferabilityMode.Unknown)
{
helpMsg += "Please choose a referability mode.";
}
// We use Trim here because having extra newlines looks ugly.
errorString = errorMsg.Trim();
helpString = helpMsg;
isValid = (
validName &&
validType &&
referability != ReferabilityMode.Unknown
);
}
