/// <summary>
/// JavaScript callback. Reads the specified file content and returns it as string.
/// </summary>
public InternalHandle Read(
V8Engine engine,
bool isConstructCall,
InternalHandle self,
params InternalHandle[] args)
{
if (args.Length != 3)
{
this.TraceError("IEmmetFile read called with invalid number of arguments.");
return engine.CreateValue(false);
}
string targetFilePath = args[0].AsString;
int chunkSize = args[1].AsInt32;
ObjectHandle callback = args[2];
if (!File.Exists(targetFilePath))
{
this.TraceError($"Emmet requested file {targetFilePath} that does not exist.");
callback.StaticCall(engine.CreateValue(true), engine.CreateNullValue());
return engine.CreateValue(false);
}
char[] buf = new char[chunkSize];
FileStream stream = File.OpenRead(targetFilePath);
using (StreamReader reader = new StreamReader(stream))
{
chunkSize = reader.ReadBlock(buf, 0, chunkSize);
}
string retVal = new string(buf, 0, chunkSize);
callback.StaticCall(engine.CreateValue(false), engine.CreateValue(retVal));
return engine.CreateValue(true);
}
/// <summary>
/// JavaScript callback. Returns current editor's file path.
/// </summary>
public InternalHandle GetFilePath(
V8Engine engine,
bool isConstructCall,
InternalHandle self,
params InternalHandle[] args)
{
// As of version 1.3 this callback is required only for actions with external images that we don't
// support.
return engine.CreateNullValue();
}
/// <summary>
/// JavaScript callback. Asks user to enter something.
/// </summary>
public InternalHandle Prompt(
V8Engine engine,
bool isConstructCall,
InternalHandle self,
params InternalHandle[] args)
{
string input = _editor.Prompt();
if (string.IsNullOrWhiteSpace(input))
return engine.CreateNullValue();
return engine.CreateValue(input);
}
/// <summary>
/// JavaScript callback. Returns current output profile name (see profile module). In most cases,
/// this method should return <code>null</code> and let Emmet guess best profile name for current
/// syntax and user data. In case you’re using advanced editor with access to syntax scopes (like
/// Sublime Text 2), you can return syntax name for current scope. For example, you may return
/// `line` profile when editor caret is inside string of programming language.
/// </summary>
public InternalHandle GetProfileName(
V8Engine engine,
bool isConstructCall,
InternalHandle self,
params InternalHandle[] args)
{
// Let Emmet engine detect profile
return engine.CreateNullValue();
}