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// Copyright (c) 2010 Joe Moorhouse
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using ICSharpCode.AvalonEdit.CodeCompletion;
using ICSharpCode.AvalonEdit;
using ICSharpCode.AvalonEdit.Editing;
using ICSharpCode.AvalonEdit.Document;
using Microsoft.Scripting.Hosting.Shell;
using Microsoft.Scripting.Hosting;
using Microsoft.Scripting;
using System.Threading;
using System.Reflection;
namespace PythonConsoleControl
{
/// <summary>
/// Provides code completion for the Python Console window.
/// </summary>
public class PythonConsoleCompletionDataProvider
{
CommandLine commandLine;
internal volatile bool AutocompletionInProgress = false;
bool excludeCallables;
public bool ExcludeCallables { get { return excludeCallables; } set { excludeCallables = value; } }
public PythonConsoleCompletionDataProvider(CommandLine commandLine)//IMemberProvider memberProvider)
{
this.commandLine = commandLine;
}
/// <summary>
/// Generates completion data for the specified text. The text should be everything before
/// the dot character that triggered the completion. The text can contain the command line prompt
/// '>>>' as this will be ignored.
/// </summary>
public ICompletionData[] GenerateCompletionData(string line)
{
List<PythonCompletionData> items = new List<PythonCompletionData>(); //DefaultCompletionData
string name = GetName(line);
// A very simple test of callables!
if (excludeCallables && name.Contains(')')) return null;
if (!String.IsNullOrEmpty(name))
{
System.IO.Stream stream = commandLine.ScriptScope.Engine.Runtime.IO.OutputStream;
try
{
AutocompletionInProgress = true;
// Another possibility:
//commandLine.ScriptScope.Engine.Runtime.IO.SetOutput(new System.IO.MemoryStream(), Encoding.UTF8);
//object value = commandLine.ScriptScope.Engine.CreateScriptSourceFromString(name, SourceCodeKind.Expression).Execute(commandLine.ScriptScope);
//IList<string> members = commandLine.ScriptScope.Engine.Operations.GetMemberNames(value);
Type type = TryGetType(name);
// Use Reflection for everything except in-built Python types and COM pbjects.
if (type != null && type.Namespace != "IronPython.Runtime" && (type.Name != "__ComObject"))
{
PopulateFromCLRType(items, type, name);
}
}
catch (ThreadAbortException tae)
{
if (tae.ExceptionState is Microsoft.Scripting.KeyboardInterruptException) Thread.ResetAbort();
}
catch
{
// Do nothing.
}
commandLine.ScriptScope.Engine.Runtime.IO.SetOutput(stream, Encoding.UTF8);
AutocompletionInProgress = false;
}
return items.ToArray();
}
protected Type TryGetType(string name)
{
string tryGetType = name + ".GetType()";
object type = null;
try
{
type = commandLine.ScriptScope.Engine.CreateScriptSourceFromString(tryGetType, SourceCodeKind.Expression).Execute(commandLine.ScriptScope);
}
catch (ThreadAbortException tae)
{
if (tae.ExceptionState is Microsoft.Scripting.KeyboardInterruptException) Thread.ResetAbort();
}
catch
{
// Do nothing.
}
return type as Type;
}
protected void PopulateFromCLRType(List<PythonCompletionData> items, Type type, string name)
{
List<string> completionsList = new List<string>();
MethodInfo[] methodInfo = type.GetMethods();
PropertyInfo[] propertyInfo = type.GetProperties();
FieldInfo[] fieldInfo = type.GetFields();
foreach (MethodInfo methodInfoItem in methodInfo)
{
if ((methodInfoItem.IsPublic)
&& (methodInfoItem.Name.IndexOf("get_") != 0) && (methodInfoItem.Name.IndexOf("set_") != 0)
&& (methodInfoItem.Name.IndexOf("add_") != 0) && (methodInfoItem.Name.IndexOf("remove_") != 0)
&& (methodInfoItem.Name.IndexOf("__") != 0))
completionsList.Add(methodInfoItem.Name);
}
foreach (PropertyInfo propertyInfoItem in propertyInfo)
{
completionsList.Add(propertyInfoItem.Name);
}
foreach (FieldInfo fieldInfoItem in fieldInfo)
{
completionsList.Add(fieldInfoItem.Name);
}
completionsList.Sort();
string last = "";
for (int i = completionsList.Count - 1; i > 0; --i)
{
if (completionsList[i] == last) completionsList.RemoveAt(i);
else last = completionsList[i];
}
foreach (string completion in completionsList)
{
items.Add(new PythonCompletionData(completion, name, commandLine, true));
}
}
/// <summary>
/// Generates completion data for the specified text. The text should be everything before
/// the dot character that triggered the completion. The text can contain the command line prompt
/// '>>>' as this will be ignored.
/// </summary>
public void GenerateDescription(string stub, string item, DescriptionUpdateDelegate updateDescription, bool isInstance)
{
System.IO.Stream stream = commandLine.ScriptScope.Engine.Runtime.IO.OutputStream;
string description = "";
if (!String.IsNullOrEmpty(item))
{
try
{
AutocompletionInProgress = true;
// Another possibility:
//commandLine.ScriptScope.Engine.Runtime.IO.SetOutput(new System.IO.MemoryStream(), Encoding.UTF8);
//object value = commandLine.ScriptScope.Engine.CreateScriptSourceFromString(item, SourceCodeKind.Expression).Execute(commandLine.ScriptScope);
//description = commandLine.ScriptScope.Engine.Operations.GetDocumentation(value);
string docCommand = "";
if (isInstance) docCommand = "type(" + stub + ")" + "." + item + ".__doc__";
else docCommand = stub + "." + item + ".__doc__";
object value = commandLine.ScriptScope.Engine.CreateScriptSourceFromString(docCommand, SourceCodeKind.Expression).Execute(commandLine.ScriptScope);
description = (string)value;
description = description?.Replace($"){item}", $")\r\n{item}");
AutocompletionInProgress = false;
}
catch (ThreadAbortException tae)
{
if (tae.ExceptionState is Microsoft.Scripting.KeyboardInterruptException) Thread.ResetAbort();
AutocompletionInProgress = false;
}
catch
{
AutocompletionInProgress = false;
// Do nothing.
}
commandLine.ScriptScope.Engine.Runtime.IO.SetOutput(stream, Encoding.UTF8);
updateDescription(description);
}
}
string GetName(string text)
{
text = text.Replace("\t", " ");
int startIndex = text.LastIndexOf(' ');
return text.Substring(startIndex + 1).Trim('.');
}
}
}
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