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Viewing changes to src/addins/AspNet/MonoDevelop.AspNet.Mvc/StateEngine/RazorStatementState.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
Import upstream version 4.0.5+dfsg

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src/addins/AspNet/MonoDevelop.AspNet.Mvc/StateEngine/RazorStatementState.cs
 
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//
 
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// RazorStatementState.cs
 
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//
 
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// Author:
 
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//              Piotr Dowgiallo <sparekd@gmail.com>
 
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//
 
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// Copyright (c) 2012 Piotr Dowgiallo
 
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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 System.Linq;
 
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using MonoDevelop.Xml.StateEngine;
 
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using System.Diagnostics;
 
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using MonoDevelop.AspNet.Mvc.Parser;
 
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namespace MonoDevelop.AspNet.Mvc.StateEngine
 
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{
 
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        public class RazorStatementState : RazorCodeFragmentState
 
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        {
 
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                protected const int POSSIBLE_CONTINUATION = MAXCONST + 1;
 
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                protected const int ELSE = POSSIBLE_CONTINUATION + 1;
 
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                IEnumerable<String> keys;
 
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                RazorStatementState statementState;
 
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                public RazorStatement CorrespondingStatement {
 
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                        get { return CorrespondingBlock as RazorStatement; }
 
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                }
 
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                public override State PushChar (char c, IParseContext context, ref string rollback)
 
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                {
 
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                        if (context.CurrentStateLength == 1) {
 
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                                bracketsBuilder.Clear ();
 
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                                var stm = context.Nodes.FirstOrDefault (n => n is RazorStatement);
 
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                                if (stm == null) {
 
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                                        if (context.PreviousState is XmlClosingTagState && CorrespondingStatement != null)
 
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                                                context.Nodes.Push (CorrespondingStatement);
 
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                                        else {
 
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                                                Debug.Fail ("Statement should be pushed before changing the state to StatementState");
 
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                                                return Parent;
 
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                                        }
 
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                                } else
 
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                                        CorrespondingBlock = stm as RazorCodeFragment;
 
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                        }
 
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                        if (context.StateTag == POSSIBLE_CONTINUATION) {
 
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                                if (!Char.IsWhiteSpace (c))
 
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                                        context.KeywordBuilder.Append (c);
 
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                                string currentKey = context.KeywordBuilder.ToString ();
 
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                                if (!keys.Any (s => s.StartsWith (currentKey))) {
 
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                                        rollback = String.Empty;
 
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                                        var p = Parent;
 
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                                        while (!(p is RazorSpeculativeState))
 
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                                                p = p.Parent;
 
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                                        return p.Parent;
 
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                                }
 
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                                if (keys.Any (s => s == currentKey)) {
 
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                                        if (currentKey != "else")
 
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                                                return SwitchToContinuationStatement (context, currentKey);
 
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                                        else
 
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                                                context.StateTag = ELSE;
 
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                                }
 
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                                return null;
 
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                        }
 
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                        if (context.StateTag == ELSE) {
 
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                                if (c != ' ') {
 
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                                        string currentKey = context.KeywordBuilder.ToString ();
 
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                                        if (c == 'i' && currentKey.Trim () == "else")
 
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                                                currentKey = "else if";
 
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                                        return SwitchToContinuationStatement (context, currentKey);
 
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                                }
 
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                                context.KeywordBuilder.Append (c);
 
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                                return null;
 
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                        }
 
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                        switch (c) {
 
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                        case '{':
 
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                                if (context.StateTag != TRANSITION)
 
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                                        return ParseOpeningBracket (c, context);
 
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                                break;
 
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                        case '}':
 
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                                return ParseClosingBracket<RazorStatement> (c, context, Parent.Parent);
 
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                        }
 
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                        return base.PushChar (c, context, ref rollback);
 
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                }
 
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                State SwitchToContinuationStatement (IParseContext context, string key)
 
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                {
 
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                        string name = key.Trim ();
 
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                        int length = key.Length;
 
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                        if (name == "else if")
 
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                                length = key.Length - 1;
 
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                        else if (name == "else")
 
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                                length = key.Length + 1;
 
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                        var stm = new RazorStatement (context.LocationMinus (length)) { Name = name };
 
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                        context.Nodes.Push (stm);
 
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                        return EnsureSetAndAdopted<RazorStatementState> (ref statementState);
 
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                }
 
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                public override State ParseClosingBracket<T> (char c, IParseContext context, State stateToReturn)
 
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                {
 
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                        if (base.ParseClosingBracket<T> (c, context, stateToReturn) != null) {
 
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                                if (RazorSymbols.CanBeContinued (CorrespondingBlock.Name)) {
 
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                                        keys = RazorSymbols.PossibleKeywordsAfter (CorrespondingBlock.Name);
 
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                                        context.StateTag = POSSIBLE_CONTINUATION;
 
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                                } else
 
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                                        return stateToReturn;
 
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                        }
 
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                        return null;
 
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                }
 
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        }
 
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}