PythonResolver.cs :  » IDEs » MonoDevelop » PyBinding » Parser » C# / CSharp Open Source

// PythonResolver.cs
// 
// Copyright (c) 2009 Christian Hergert <chris@dronelabs.com>
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

using System;
using System.Collections.Generic;

using MonoDevelop.Projects.Dom;
using MonoDevelop.Projects.Dom.Parser;

using PyBinding;
using PyBinding.Parser.Dom;

namespace PyBinding.Parser{
  public class PythonResolver: IResolver
  {
    ProjectDom m_dom;
    string m_filename;
    
    public PythonResolver (ProjectDom dom, string filename)
    {
      m_filename = filename;
      m_dom = dom;
    }
    
    ResolveResult IResolver.Resolve (ExpressionResult expressionResult, DomLocation resolvePosition)
    {
      var expr = expressionResult as PythonExpressionResult;
      if (expr == null)
        return null;
      
      var doc = ProjectDomService.GetParsedDocument (m_dom, m_filename) as PythonParsedDocument;
      if (doc == null)
        return null;
      
      var unit = doc.CompilationUnit as PythonCompilationUnit;
      if (unit == null)
        return null;
      
      if (expr.Type == "def")
      {
        var type = unit.GetTypeAt (resolvePosition);
        if (type != null)
        {
          // resolving a method
          foreach (var func in type.Methods)
          {
            if (func.Name == expr.Word)
            {
              var l = new List<IMember> ();
              l.Add (func);
              return new MethodResolveResult (l);
            }
          }
        }
      }
      
      else if (expr.Type == "class")
      {
        var type = unit.GetTypeAt (resolvePosition);
        if (type != null && type.Name == expr.Word)
          return new MemberResolveResult (type);
      }
      
      else if (expr.Word == "self")
      {
        var type = unit.GetTypeAt (resolvePosition);
        if (type != null)
          return new MemberResolveResult (type);
      }
      
      else if (expr.Type == "self")
      {
        // looking for a member of self
        var type = unit.GetTypeAt (resolvePosition);
        if (type != null)
        {
          foreach (var attr in type.Fields)
          {
            if (attr.Name == expr.Word)
              return new MemberResolveResult (attr);
          }
          
          foreach (var method in type.Methods)
          {
            if (method.Name == expr.Word)
              return CreateMethodResult (method);
          }
        }
      }
      
      return null;
    }
    
    MethodResolveResult CreateMethodResult (IMethod method)
    {
      var l = new List<IMember> ();
      l.Add (method);
      return new MethodResolveResult (l);
    }
    
//    IBaseMember NearestTo (IEnumerable<IBaseMember> items, DomLocation location)
//    {
//      int lineOffset = -1, columnOffset = -1;
//      IBaseMember nearest = null;
//      
//      foreach (var member in items)
//      {
//        if (location < member.Location)
//          continue;
//        
//        DomRegion region = DomRegion.Empty;
//        
//        if (member is DomType)
//          region = (member as DomType).BodyRegion;
//        else if (member is DomMethod)
//          region = (member as DomMethod).BodyRegion;
//        
//        if (!region.IsEmpty && region.End < location)
//          continue;
//        
//        int curLineOffset = Math.Abs (member.Location.Line - location.Line);
//        int curColumnOffset = Math.Abs (member.Location.Column - location.Column);
//        
//        if (lineOffset == -1 || curLineOffset < lineOffset)
//        {
//          lineOffset = curLineOffset;
//          columnOffset = curColumnOffset;
//          nearest = member;
//        }
//        else if (columnOffset == -1 || (lineOffset == curLineOffset && curColumnOffset < columnOffset))
//        {
//          columnOffset = curColumnOffset;
//          nearest = member;
//        }
//      }
//      
//      return nearest;
//    }
  }
}