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//
// RazorCodeFragmentState.cs
//
// Author:
// Piotr Dowgiallo <sparekd@gmail.com>
//
// Copyright (c) 2012 Piotr Dowgiallo
//
// 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.Text;
using MonoDevelop.Xml.StateEngine;
using MonoDevelop.AspNet.StateEngine;
using MonoDevelop.AspNet.Mvc.Parser;
namespace MonoDevelop.AspNet.Mvc.StateEngine
{
public abstract class RazorCodeFragmentState : RazorState
{
protected const int NONE = 0;
protected const int BRACKET = 1;
protected const int SOLIDUS = 2;
protected const int INSIDE_PARENTHESES = 3;
protected const int TRANSITION = 4;
protected const int MAXCONST = TRANSITION;
char previousChar;
protected StringBuilder bracketsBuilder;
HtmlTagState htmlTagState;
HtmlClosingTagState htmlClosingTagState;
RazorCommentState razorCommentState;
RazorSpeculativeState speculativeState;
RazorExpressionState expressionState;
RazorCodeBlockState childBlockState;
public RazorCodeFragment CorrespondingBlock { get; set; }
public bool IsInsideParentheses { get; protected set; }
public bool IsInsideGenerics { get; protected set; }
public RazorCodeFragmentState ()
: this (new HtmlTagState (true), new HtmlClosingTagState (true),
new RazorCommentState (), new RazorExpressionState (), new RazorSpeculativeState ())
{
}
public RazorCodeFragmentState (HtmlTagState html, HtmlClosingTagState htmlClosing,
RazorCommentState comment, RazorExpressionState expression, RazorSpeculativeState speculative)
{
htmlTagState = html;
htmlClosingTagState = htmlClosing;
razorCommentState = comment;
expressionState = expression;
speculativeState = speculative;
Adopt (htmlTagState);
Adopt (htmlClosingTagState);
Adopt (razorCommentState);
Adopt (expressionState);
Adopt (speculativeState);
bracketsBuilder = new StringBuilder ();
}
public override State PushChar (char c, IParseContext context, ref string rollback)
{
switch (context.StateTag) {
case SOLIDUS:
if (Char.IsLetter (c)) {
rollback = String.Empty;
return htmlClosingTagState;
}
context.StateTag = NONE;
break;
case BRACKET:
if (Char.IsLetter (c)) {
rollback = String.Empty;
return htmlTagState;
}
else if (c == '/')
context.StateTag = SOLIDUS;
else
context.StateTag = NONE;
break;
case TRANSITION:
rollback = String.Empty;
switch (c) {
case '{':
return EnsureSetAndAdopted<RazorCodeBlockState> (ref childBlockState);
case '*':
return razorCommentState;
case '(':
return expressionState;
default:
if (context.CurrentStateLength <= 2 || (!Char.IsLetterOrDigit (previousChar)
&& (Char.IsLetter (c) || c == '_')))
return speculativeState;
else
context.StateTag = NONE;
break;
}
break;
case INSIDE_PARENTHESES:
if (c == '(')
context.KeywordBuilder.Append (c);
else if (c == ')') {
if (context.KeywordBuilder.Length > 0)
context.KeywordBuilder.Remove (0, 1);
if (context.KeywordBuilder.Length == 0) {
context.StateTag = NONE;
IsInsideParentheses = false;
}
}
break;
case NONE:
switch (c) {
case '(':
context.KeywordBuilder.Append (c);
context.StateTag = INSIDE_PARENTHESES;
IsInsideParentheses = true;
break;
case '<':
if (context.Nodes.Peek () is XElement || !Char.IsLetterOrDigit (previousChar)) {
context.StateTag = BRACKET;
IsInsideGenerics = false;
} else
IsInsideGenerics = true;
break;
case '>':
IsInsideGenerics = false;
break;
case '@':
context.StateTag = TRANSITION;
break;
default:
previousChar = c;
break;
}
break;
}
return null;
}
// ParseOpeningBracket and ParseClosingBracket can use simplified method of tracking brackets.
// It's fast, and works correctly when parsing char by char, but sometimes may incorrectly determine
// the end of a block in nested subblocks when we click inside the block from another one,
// because the parent block isn't parsed from end to end then.
// The simplified version is used mostly for testing. In real environment finding matching brackets
// precisely is necessary for code completion.
public virtual State ParseOpeningBracket (char c, IParseContext context)
{
var rootState = RootState as RazorFreeState;
if (!rootState.UseSimplifiedBracketTracker && !CorrespondingBlock.FirstBracket.HasValue)
CorrespondingBlock.FindFirstBracket (context.Location);
else if (rootState.UseSimplifiedBracketTracker)
bracketsBuilder.Append (c);
return null;
}
public virtual State ParseClosingBracket<T> (char c, IParseContext context, State stateToReturn) where T : XNode
{
bool isEnding = false;
var rootState = RootState as RazorFreeState;
if (rootState.UseSimplifiedBracketTracker) {
if (bracketsBuilder.Length > 0)
bracketsBuilder.Remove (0, 1);
if (bracketsBuilder.Length == 0)
isEnding = true;
}
else if (!rootState.UseSimplifiedBracketTracker && CorrespondingBlock.IsEndingBracket (context.LocationMinus (1)))
isEnding = true;
if (isEnding) {
StateEngineService.EndCodeFragment<T> (context);
return stateToReturn;
}
return null;
}
}
}
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