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Viewing changes to external/nrefactory/ICSharpCode.NRefactory.CSharp/Completion/ICompletionContextProvider.cs

  • Committer: Package Import Robot
  • Author(s): Jo Shields
  • Date: 2013-05-12 09:46:03 UTC
  • mto: This revision was merged to the branch mainline in revision 29.
  • Revision ID: package-import@ubuntu.com-20130512094603-mad323bzcxvmcam0
Tags: upstream-4.0.5+dfsg
ImportĀ upstreamĀ versionĀ 4.0.5+dfsg

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external/nrefactory/ICSharpCode.NRefactory.CSharp/Completion/ICompletionContextProvider.cs
 
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ļ»æ// 
 
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// IMemberProvider.cs
 
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//  
 
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// Author:
 
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//       Mike KrĆ¼ger <mkrueger@xamarin.com>
 
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// 
 
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// Copyright (c) 2012 Xamarin Inc.
 
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// 
 
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// Permission is hereby granted, free of charge, to any person obtaining a copy
 
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// of this software and associated documentation files (the "Software"), to deal
 
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// in the Software without restriction, including without limitation the rights
 
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 
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// copies of the Software, and to permit persons to whom the Software is
 
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// furnished to do so, subject to the following conditions:
 
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// 
 
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// The above copyright notice and this permission notice shall be included in
 
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// all copies or substantial portions of the Software.
 
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// 
 
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 
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// THE SOFTWARE.
 
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using System;
 
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using System.Collections.Generic;
 
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using ICSharpCode.NRefactory.TypeSystem;
 
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using ICSharpCode.NRefactory.Editor;
 
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using ICSharpCode.NRefactory.CSharp.TypeSystem;
 
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using System.Linq;
 
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using ICSharpCode.NRefactory.CSharp.Resolver;
 
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namespace ICSharpCode.NRefactory.CSharp.Completion
 
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{
 
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        public interface ICompletionContextProvider
 
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        {
 
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                IList<string> ConditionalSymbols {
 
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                        get;
 
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                }
 
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                void GetCurrentMembers (int offset, out IUnresolvedTypeDefinition currentType, out IUnresolvedMember currentMember);
 
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                Tuple<string, TextLocation> GetMemberTextToCaret(int caretOffset, IUnresolvedTypeDefinition currentType, IUnresolvedMember currentMember);
 
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                CSharpAstResolver GetResolver (CSharpResolver resolver, AstNode rootNode);
 
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        }
 
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        public class DefaultCompletionContextProvider : ICompletionContextProvider
 
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        {
 
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                readonly IDocument document;
 
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                readonly CSharpUnresolvedFile unresolvedFile;
 
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                readonly List<string> symbols = new List<string> ();
 
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                public IList<string> ConditionalSymbols {
 
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                        get {
 
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                                return symbols;
 
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                        }
 
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                }
 
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                public DefaultCompletionContextProvider (IDocument document, CSharpUnresolvedFile unresolvedFile)
 
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                {
 
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                        if (document == null)
 
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                                throw new ArgumentNullException("document");
 
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                        if (unresolvedFile == null)
 
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                                throw new ArgumentNullException("unresolvedFile");
 
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                        this.document = document;
 
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                        this.unresolvedFile = unresolvedFile;
 
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                }
 
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                public void AddSymbol (string sym)
 
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                {
 
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                        symbols.Add (sym);
 
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                }
 
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                public void GetCurrentMembers(int offset, out IUnresolvedTypeDefinition currentType, out IUnresolvedMember currentMember)
 
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                {
 
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                        //var document = engine.document;
 
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                        var location = document.GetLocation(offset);
 
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                        currentType = null;
 
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                        foreach (var type in unresolvedFile.TopLevelTypeDefinitions) {
 
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                                if (type.Region.Begin < location)
 
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                                        currentType = type;
 
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                        }
 
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                        currentType = FindInnerType (currentType, location);
 
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                        // location is beyond last reported end region, now we need to check, if the end region changed
 
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                        if (currentType != null && currentType.Region.End < location) {
 
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                                if (!IsInsideType (currentType, location))
 
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                                        currentType = null;
 
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                        }
 
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                        currentMember = null;
 
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                        if (currentType != null) {
 
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                                foreach (var member in currentType.Members) {
 
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                                        if (member.Region.Begin < location && (currentMember == null || currentMember.Region.Begin < member.Region.Begin))
 
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                                                currentMember = member;
 
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                                }
 
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                        }
 
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                        // location is beyond last reported end region, now we need to check, if the end region changed
 
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                        // NOTE: Enums are a special case, there the "last" field needs to be treated as current member
 
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                        if (currentMember != null && currentMember.Region.End < location && currentType.Kind != TypeKind.Enum) {
 
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                                if (!IsInsideType (currentMember, location))
 
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                                        currentMember = null;
 
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                        }/*
 
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                        var stack = GetBracketStack (engine.GetMemberTextToCaret ().Item1);
 
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                        if (stack.Count == 0)
 
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                                currentMember = null;*/
 
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                }
 
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                IUnresolvedTypeDefinition FindInnerType (IUnresolvedTypeDefinition parent, TextLocation location)
 
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                {
 
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                        if (parent == null)
 
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                                return null;
 
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                        var currentType = parent;
 
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                        foreach (var type in parent.NestedTypes) {
 
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                                if (type.Region.Begin < location  && location < type.Region.End)
 
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                                        currentType = FindInnerType (type, location);
 
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                        }
 
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                        return currentType;
 
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                }
 
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                bool IsInsideType (IUnresolvedEntity currentType, TextLocation location)
 
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                {
 
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                        int startOffset = document.GetOffset (currentType.Region.Begin);
 
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                        int endOffset = document.GetOffset (location);
 
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                        //bool foundEndBracket = false;
 
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                        var bracketStack = new Stack<char> ();
 
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                        bool isInString = false, isInChar = false;
 
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                        bool isInLineComment = false, isInBlockComment = false;
 
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                        for (int i = startOffset; i < endOffset; i++) {
 
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                                char ch = document.GetCharAt (i);
 
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                                switch (ch) {
 
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                                        case '(':
 
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                                        case '[':
 
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                                        case '{':
 
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                                                if (!isInString && !isInChar && !isInLineComment && !isInBlockComment)
 
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                                                        bracketStack.Push (ch);
 
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                                                break;
 
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                                        case ')':
 
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                                        case ']':
 
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                                        case '}':
 
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                                                if (!isInString && !isInChar && !isInLineComment && !isInBlockComment)
 
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                                                if (bracketStack.Count > 0)
 
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                                                        bracketStack.Pop ();
 
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                                                break;
 
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                                        case '\r':
 
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                                        case '\n':
 
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                                                isInLineComment = false;
 
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                                                break;
 
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                                        case '/':
 
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                                                if (isInBlockComment) {
 
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                                                        if (i > 0 && document.GetCharAt (i - 1) == '*') 
 
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                                                                isInBlockComment = false;
 
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                                                } else if (!isInString && !isInChar && i + 1 < document.TextLength) {
 
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                                                        char nextChar = document.GetCharAt (i + 1);
 
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                                                        if (nextChar == '/')
 
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                                                                isInLineComment = true;
 
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                                                        if (!isInLineComment && nextChar == '*')
 
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                                                                isInBlockComment = true;
 
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                                                }
 
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                                                break;
 
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                                        case '"':
 
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                                                if (!(isInChar || isInLineComment || isInBlockComment)) 
 
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                                                        isInString = !isInString;
 
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                                                break;
 
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                                        case '\'':
 
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                                                if (!(isInString || isInLineComment || isInBlockComment)) 
 
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                                                        isInChar = !isInChar;
 
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                                                break;
 
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                                        default :
 
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                                                break;
 
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                                        }
 
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                                }
 
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                        return bracketStack.Any (t => t == '{');
 
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                }
 
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183
                public Tuple<string, TextLocation> GetMemberTextToCaret(int caretOffset, IUnresolvedTypeDefinition currentType, IUnresolvedMember currentMember)
 
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                {
 
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                        int startOffset;
 
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                        if (currentMember != null && currentType != null && currentType.Kind != TypeKind.Enum) {
 
187
                                startOffset = document.GetOffset(currentMember.Region.Begin);
 
188
                        } else if (currentType != null) {
 
189
                                startOffset = document.GetOffset(currentType.Region.Begin);
 
190
                        } else {
 
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                                startOffset = 0;
 
192
                        }
 
193
                        while (startOffset > 0) {
 
194
                                char ch = document.GetCharAt(startOffset - 1);
 
195
                                if (ch != ' ' && ch != '\t') {
 
196
                                        break;
 
197
                                }
 
198
                                --startOffset;
 
199
                        }
 
200
 
 
201
                        return Tuple.Create (document.GetText (startOffset, caretOffset - startOffset), document.GetLocation (startOffset));
 
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                }
 
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204
 
 
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                public CSharpAstResolver GetResolver (CSharpResolver resolver, AstNode rootNode)
 
206
                {
 
207
                        return new CSharpAstResolver (resolver, rootNode, unresolvedFile);
 
208
                }
 
209
 
 
210
 
 
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        }
 
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}
 
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