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Viewing changes to src/addins/AspNet/MonoDevelop.AspNet.Mvc/StateEngine/RazorCodeFragmentState.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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src/addins/AspNet/MonoDevelop.AspNet.Mvc/StateEngine/RazorCodeFragmentState.cs
 
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ļ»æ//
 
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// RazorCodeFragmentState.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.Text;
 
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using MonoDevelop.Xml.StateEngine;
 
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using MonoDevelop.AspNet.StateEngine;
 
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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 abstract class RazorCodeFragmentState : RazorState
 
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        {
 
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                protected const int NONE = 0;
 
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                protected const int BRACKET = 1;
 
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                protected const int SOLIDUS = 2;
 
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                protected const int INSIDE_PARENTHESES = 3;
 
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                protected const int TRANSITION = 4;
 
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                protected const int MAXCONST = TRANSITION;
 
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                char previousChar;
 
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                protected StringBuilder bracketsBuilder;
 
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                HtmlTagState htmlTagState;
 
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                HtmlClosingTagState htmlClosingTagState;
 
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                RazorCommentState razorCommentState;
 
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                RazorSpeculativeState speculativeState;
 
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                RazorExpressionState expressionState;
 
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                RazorCodeBlockState childBlockState;
 
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                public RazorCodeFragment CorrespondingBlock { get; set; }
 
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                public bool IsInsideParentheses { get; protected set; }
 
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                public bool IsInsideGenerics { get; protected set; }
 
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                public RazorCodeFragmentState ()
 
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                        : this (new HtmlTagState (true), new HtmlClosingTagState (true),
 
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                        new RazorCommentState (), new RazorExpressionState (), new RazorSpeculativeState ())
 
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                {
 
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                }
 
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                public RazorCodeFragmentState (HtmlTagState html, HtmlClosingTagState htmlClosing,
 
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                        RazorCommentState comment, RazorExpressionState expression, RazorSpeculativeState speculative)
 
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                {
 
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                        htmlTagState = html;
 
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                        htmlClosingTagState = htmlClosing;
 
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                        razorCommentState = comment;
 
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                        expressionState = expression;
 
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                        speculativeState = speculative;
 
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                        Adopt (htmlTagState);
 
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                        Adopt (htmlClosingTagState);
 
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                        Adopt (razorCommentState);
 
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                        Adopt (expressionState);
 
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                        Adopt (speculativeState);
 
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                        bracketsBuilder = new StringBuilder ();
 
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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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                        switch (context.StateTag) {
 
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                        case SOLIDUS:
 
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                                if (Char.IsLetter (c)) {
 
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                                        rollback = String.Empty;
 
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                                        return htmlClosingTagState;
 
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                                }
 
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                                context.StateTag = NONE;
 
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                                break;
 
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                        case BRACKET:
 
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                                if (Char.IsLetter (c)) {
 
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                                        rollback = String.Empty;
 
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                                        return htmlTagState;
 
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                                }
 
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                                else if (c == '/')
 
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                                        context.StateTag = SOLIDUS;
 
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                                else
 
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                                        context.StateTag = NONE;
 
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                                break;
 
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                        case TRANSITION:
 
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                                rollback = String.Empty;
 
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                                switch (c) {
 
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                                case '{':
 
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                                        return EnsureSetAndAdopted<RazorCodeBlockState> (ref childBlockState);
 
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                                case '*':
 
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                                        return razorCommentState;
 
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                                case '(':
 
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                                        return expressionState;
 
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                                default:
 
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                                        if (context.CurrentStateLength <= 2 || (!Char.IsLetterOrDigit (previousChar) 
 
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                                                        && (Char.IsLetter (c) || c == '_')))
 
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                                                return speculativeState;
 
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                                        else
 
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                                                context.StateTag = NONE;
 
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                                        break;
 
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                                }
 
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                                break;
 
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                        case INSIDE_PARENTHESES:
 
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                                if (c == '(')
 
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                                        context.KeywordBuilder.Append (c);
 
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                                else if (c == ')') {
 
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                                        if (context.KeywordBuilder.Length > 0)
 
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                                                context.KeywordBuilder.Remove (0, 1);
 
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                                        if (context.KeywordBuilder.Length == 0) {
 
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                                                context.StateTag = NONE;
 
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                                                IsInsideParentheses = false;
 
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                                        }
 
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                                }
 
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                                break;
 
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                        case NONE:
 
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                                switch (c) {
 
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                                case '(':
 
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                                        context.KeywordBuilder.Append (c);
 
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                                        context.StateTag = INSIDE_PARENTHESES;
 
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                                        IsInsideParentheses = true;
 
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                                        break;
 
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                                case '<':
 
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                                        if (context.Nodes.Peek () is XElement || !Char.IsLetterOrDigit (previousChar)) {
 
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                                                context.StateTag = BRACKET;
 
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                                                IsInsideGenerics = false;
 
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                                        } else
 
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                                                IsInsideGenerics = true;
 
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                                        break;
 
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                                case '>':
 
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                                        IsInsideGenerics = false;
 
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                                        break;
 
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                                case '@':
 
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                                        context.StateTag = TRANSITION;
 
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                                        break;
 
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                                default:
 
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                                        previousChar = c;
 
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                                        break;
 
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                                }
 
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                                break;
 
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                        }
 
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                        return null;
 
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                }
 
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                // ParseOpeningBracket and ParseClosingBracket can use simplified method of tracking brackets.
 
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                // It's fast, and works correctly when parsing char by char, but sometimes may incorrectly determine
 
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                // the end of a block in nested subblocks when we click inside the block from another one,
 
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                // because the parent block isn't parsed from end to end then.
 
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                // The simplified version is used mostly for testing. In real environment finding matching brackets
 
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                // precisely is necessary for code completion.
 
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                public virtual State ParseOpeningBracket (char c, IParseContext context)
 
180
                {
 
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                        var rootState = RootState as RazorFreeState;
 
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                        if (!rootState.UseSimplifiedBracketTracker && !CorrespondingBlock.FirstBracket.HasValue)
 
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                                CorrespondingBlock.FindFirstBracket (context.Location);
 
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                        else if (rootState.UseSimplifiedBracketTracker)
 
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                                bracketsBuilder.Append (c);
 
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                        return null;
 
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                }
 
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189
                public virtual State ParseClosingBracket<T> (char c, IParseContext context, State stateToReturn) where T : XNode
 
190
                {
 
191
                        bool isEnding = false;
 
192
                        var rootState = RootState as RazorFreeState;
 
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                        if (rootState.UseSimplifiedBracketTracker) {
 
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                                if (bracketsBuilder.Length > 0)
 
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                                        bracketsBuilder.Remove (0, 1);
 
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                                if (bracketsBuilder.Length == 0)
 
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                                        isEnding = true;
 
198
                        }
 
199
                        else if (!rootState.UseSimplifiedBracketTracker && CorrespondingBlock.IsEndingBracket (context.LocationMinus (1)))
 
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                                isEnding = true;
 
201
 
 
202
                        if (isEnding) {
 
203
                                StateEngineService.EndCodeFragment<T> (context);
 
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                                return stateToReturn;
 
205
                        }
 
206
 
 
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                        return null;
 
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                }
 
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        }
 
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}