1 | // |
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2 | // CSharpCompletionEngineBase.cs |
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3 | // |
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4 | // Author: |
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5 | // Mike Krüger <mkrueger@xamarin.com> |
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6 | // |
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7 | // Copyright (c) 2011 Xamarin Inc. (http://xamarin.com) |
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8 | // |
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9 | // Permission is hereby granted, free of charge, to any person obtaining a copy |
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10 | // of this software and associated documentation files (the "Software"), to deal |
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11 | // in the Software without restriction, including without limitation the rights |
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12 | // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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13 | // copies of the Software, and to permit persons to whom the Software is |
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14 | // furnished to do so, subject to the following conditions: |
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15 | // |
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16 | // The above copyright notice and this permission notice shall be included in |
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17 | // all copies or substantial portions of the Software. |
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18 | // |
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19 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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20 | // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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21 | // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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22 | // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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23 | // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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24 | // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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25 | // THE SOFTWARE. |
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26 | using System; |
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27 | using System.Collections.Generic; |
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28 | using System.Linq; |
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29 | using System.Text; |
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30 | |
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31 | using ICSharpCode.NRefactory.CSharp.Resolver; |
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32 | using ICSharpCode.NRefactory.Editor; |
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33 | using ICSharpCode.NRefactory.TypeSystem; |
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34 | using ICSharpCode.NRefactory.Semantics; |
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35 | using ICSharpCode.NRefactory.TypeSystem.Implementation; |
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36 | using ICSharpCode.NRefactory.CSharp.TypeSystem; |
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37 | |
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38 | namespace ICSharpCode.NRefactory.CSharp.Completion |
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39 | { |
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40 | /// <summary> |
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41 | /// Acts as a common base between code completion and parameter completion. |
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42 | /// </summary> |
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43 | public class CSharpCompletionEngineBase |
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44 | { |
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45 | protected IDocument document; |
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46 | protected int offset; |
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47 | protected TextLocation location; |
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48 | protected IUnresolvedTypeDefinition currentType; |
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49 | protected IUnresolvedMember currentMember; |
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50 | |
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51 | #region Input properties |
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52 | public CSharpTypeResolveContext ctx { get; private set; } |
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53 | |
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54 | public IProjectContent ProjectContent { get; private set; } |
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55 | |
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56 | ICompilation compilation; |
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57 | |
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58 | protected ICompilation Compilation { |
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59 | get { |
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60 | if (compilation == null) |
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61 | compilation = ProjectContent.Resolve (ctx).Compilation; |
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62 | return compilation; |
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63 | } |
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64 | } |
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65 | |
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66 | Version languageVersion = new Version (5, 0); |
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67 | public Version LanguageVersion { |
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68 | get { |
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69 | return languageVersion; |
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70 | } |
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71 | set { |
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72 | languageVersion = value; |
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73 | } |
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74 | } |
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75 | #endregion |
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76 | |
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77 | protected CSharpCompletionEngineBase(IProjectContent content, ICompletionContextProvider completionContextProvider, CSharpTypeResolveContext ctx) |
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78 | { |
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79 | if (content == null) |
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80 | throw new ArgumentNullException("content"); |
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81 | if (ctx == null) |
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82 | throw new ArgumentNullException("ctx"); |
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83 | if (completionContextProvider == null) |
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84 | throw new ArgumentNullException("completionContextProvider"); |
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85 | |
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86 | this.ProjectContent = content; |
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87 | this.CompletionContextProvider = completionContextProvider; |
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88 | this.ctx = ctx; |
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89 | } |
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90 | |
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91 | |
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92 | public ICompletionContextProvider CompletionContextProvider { |
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93 | get; |
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94 | private set; |
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95 | } |
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96 | |
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97 | public void SetOffset (int offset) |
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98 | { |
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99 | Reset (); |
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100 | |
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101 | this.offset = offset; |
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102 | this.location = document.GetLocation (offset); |
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103 | CompletionContextProvider.GetCurrentMembers (offset, out currentType, out currentMember); |
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104 | } |
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105 | |
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106 | public bool GetParameterCompletionCommandOffset (out int cpos) |
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107 | { |
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108 | // Start calculating the parameter offset from the beginning of the |
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109 | // current member, instead of the beginning of the file. |
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110 | cpos = offset - 1; |
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111 | var mem = currentMember; |
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112 | if (mem == null || (mem is IType) || IsInsideCommentStringOrDirective ()) { |
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113 | return false; |
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114 | } |
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115 | int startPos = document.GetOffset (mem.Region.BeginLine, mem.Region.BeginColumn); |
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116 | int parenDepth = 0; |
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117 | int chevronDepth = 0; |
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118 | Stack<int> indexStack = new Stack<int> (); |
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119 | while (cpos > startPos) { |
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120 | char c = document.GetCharAt (cpos); |
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121 | if (c == ')') { |
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122 | parenDepth++; |
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123 | } |
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124 | if (c == '>') { |
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125 | chevronDepth++; |
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126 | } |
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127 | if (c == '}') { |
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128 | if (indexStack.Count > 0) { |
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129 | parenDepth = indexStack.Pop (); |
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130 | } else { |
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131 | parenDepth = 0; |
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132 | } |
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133 | chevronDepth = 0; |
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134 | } |
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135 | if (indexStack.Count == 0 && (parenDepth == 0 && c == '(' || chevronDepth == 0 && c == '<')) { |
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136 | int p = GetCurrentParameterIndex (startPos, cpos + 1); |
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137 | if (p != -1) { |
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138 | cpos++; |
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139 | return true; |
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140 | } else { |
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141 | return false; |
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142 | } |
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143 | } |
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144 | if (c == '(') { |
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145 | parenDepth--; |
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146 | } |
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147 | if (c == '<') { |
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148 | chevronDepth--; |
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149 | } |
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150 | if (c == '{') { |
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151 | indexStack.Push (parenDepth); |
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152 | chevronDepth = 0; |
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153 | } |
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154 | cpos--; |
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155 | } |
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156 | return false; |
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157 | } |
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158 | |
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159 | public int GetCurrentParameterIndex(int triggerOffset, int endOffset) |
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160 | { |
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161 | List<string> list; |
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162 | return GetCurrentParameterIndex (triggerOffset, endOffset, out list); |
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163 | } |
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164 | |
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165 | public int GetCurrentParameterIndex (int triggerOffset, int endOffset, out List<string> usedNamedParameters) |
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166 | { |
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167 | usedNamedParameters =new List<string> (); |
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168 | var parameter = new Stack<int> (); |
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169 | var bracketStack = new Stack<Stack<int>> (); |
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170 | bool inSingleComment = false, inString = false, inVerbatimString = false, inChar = false, inMultiLineComment = false; |
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171 | var word = new StringBuilder (); |
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172 | bool foundCharAfterOpenBracket = false; |
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173 | for (int i = triggerOffset; i < endOffset; i++) { |
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174 | char ch = document.GetCharAt (i); |
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175 | char nextCh = i + 1 < document.TextLength ? document.GetCharAt (i + 1) : '\0'; |
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176 | if (ch == ':') { |
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177 | usedNamedParameters.Add (word.ToString ()); |
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178 | word.Length = 0; |
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179 | } else if (char.IsLetterOrDigit (ch) || ch =='_') { |
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180 | word.Append (ch); |
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181 | } else if (char.IsWhiteSpace (ch)) { |
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182 | |
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183 | } else { |
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184 | word.Length = 0; |
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185 | } |
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186 | if (!char.IsWhiteSpace(ch) && parameter.Count > 0) |
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187 | foundCharAfterOpenBracket = true; |
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188 | |
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189 | switch (ch) { |
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190 | case '{': |
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191 | if (inString || inChar || inVerbatimString || inSingleComment || inMultiLineComment) { |
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192 | break; |
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193 | } |
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194 | bracketStack.Push (parameter); |
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195 | parameter = new Stack<int> (); |
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196 | break; |
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197 | case '[': |
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198 | case '(': |
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199 | if (inString || inChar || inVerbatimString || inSingleComment || inMultiLineComment) { |
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200 | break; |
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201 | } |
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202 | parameter.Push (0); |
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203 | break; |
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204 | case '}': |
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205 | if (inString || inChar || inVerbatimString || inSingleComment || inMultiLineComment) { |
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206 | break; |
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207 | } |
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208 | if (bracketStack.Count > 0) { |
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209 | parameter = bracketStack.Pop (); |
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210 | } else { |
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211 | return -1; |
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212 | } |
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213 | break; |
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214 | case ']': |
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215 | case ')': |
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216 | if (inString || inChar || inVerbatimString || inSingleComment || inMultiLineComment) { |
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217 | break; |
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218 | } |
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219 | if (parameter.Count > 0) { |
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220 | parameter.Pop (); |
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221 | } else { |
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222 | return -1; |
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223 | } |
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224 | break; |
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225 | case '<': |
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226 | if (inString || inChar || inVerbatimString || inSingleComment || inMultiLineComment) { |
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227 | break; |
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228 | } |
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229 | parameter.Push (0); |
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230 | break; |
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231 | case '=': |
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232 | if (nextCh == '>') { |
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233 | i++; |
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234 | continue; |
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235 | } |
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236 | break; |
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237 | case '>': |
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238 | if (inString || inChar || inVerbatimString || inSingleComment || inMultiLineComment) { |
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239 | break; |
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240 | } |
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241 | if (parameter.Count > 0) { |
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242 | parameter.Pop (); |
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243 | } |
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244 | break; |
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245 | case ',': |
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246 | if (inString || inChar || inVerbatimString || inSingleComment || inMultiLineComment) { |
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247 | break; |
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248 | } |
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249 | if (parameter.Count > 0) { |
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250 | parameter.Push (parameter.Pop () + 1); |
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251 | } |
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252 | break; |
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253 | case '/': |
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254 | if (inString || inChar || inVerbatimString) { |
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255 | break; |
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256 | } |
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257 | if (nextCh == '/') { |
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258 | i++; |
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259 | inSingleComment = true; |
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260 | } |
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261 | if (nextCh == '*') { |
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262 | inMultiLineComment = true; |
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263 | } |
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264 | break; |
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265 | case '*': |
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266 | if (inString || inChar || inVerbatimString || inSingleComment) { |
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267 | break; |
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268 | } |
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269 | if (nextCh == '/') { |
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270 | i++; |
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271 | inMultiLineComment = false; |
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272 | } |
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273 | break; |
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274 | case '@': |
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275 | if (inString || inChar || inVerbatimString || inSingleComment || inMultiLineComment) { |
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276 | break; |
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277 | } |
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278 | if (nextCh == '"') { |
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279 | i++; |
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280 | inVerbatimString = true; |
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281 | } |
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282 | break; |
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283 | case '\\': |
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284 | if (inString || inChar) { |
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285 | i++; |
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286 | } |
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287 | break; |
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288 | case '"': |
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289 | if (inSingleComment || inMultiLineComment || inChar) { |
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290 | break; |
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291 | } |
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292 | if (inVerbatimString) { |
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293 | if (nextCh == '"') { |
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294 | i++; |
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295 | break; |
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296 | } |
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297 | inVerbatimString = false; |
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298 | break; |
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299 | } |
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300 | inString = !inString; |
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301 | break; |
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302 | case '\'': |
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303 | if (inSingleComment || inMultiLineComment || inString || inVerbatimString) { |
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304 | break; |
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305 | } |
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306 | inChar = !inChar; |
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307 | break; |
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308 | default: |
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309 | if (NewLine.IsNewLine(ch)) { |
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310 | inSingleComment = false; |
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311 | inString = false; |
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312 | inChar = false; |
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313 | } |
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314 | break; |
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315 | } |
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316 | } |
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317 | if (parameter.Count != 1 || bracketStack.Count > 0) { |
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318 | return -1; |
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319 | } |
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320 | if (!foundCharAfterOpenBracket) |
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321 | return 0; |
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322 | return parameter.Pop() + 1; |
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323 | } |
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324 | |
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325 | #region Context helper methods |
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326 | public class MiniLexer |
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327 | { |
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328 | readonly string text; |
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329 | |
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330 | public bool IsFistNonWs = true; |
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331 | public bool IsInSingleComment = false; |
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332 | public bool IsInString = false; |
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333 | public bool IsInVerbatimString = false; |
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334 | public bool IsInChar = false; |
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335 | public bool IsInMultiLineComment = false; |
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336 | public bool IsInPreprocessorDirective = false; |
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337 | |
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338 | public MiniLexer(string text) |
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339 | { |
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340 | this.text = text; |
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341 | } |
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342 | |
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343 | /// <summary> |
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344 | /// Parsing all text and calling act delegate on almost every character. |
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345 | /// Skipping begining of comments, begining of verbatim strings and escaped characters. |
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346 | /// </summary> |
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347 | /// <param name="act">Return true to abort parsing. Integer argument represent offset in text.</param> |
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348 | /// <returns>True if aborted.</returns> |
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349 | public bool Parse(Func<char, int, bool> act = null) |
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350 | { |
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351 | return Parse(0, text.Length, act); |
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352 | } |
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353 | |
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354 | |
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355 | /// <summary> |
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356 | /// Parsing text from start to start+length and calling act delegate on almost every character. |
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357 | /// Skipping begining of comments, begining of verbatim strings and escaped characters. |
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358 | /// </summary> |
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359 | /// <param name="start">Start offset.</param> |
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360 | /// <param name="length">Lenght to parse.</param> |
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361 | /// <param name="act">Return true to abort parsing. Integer argument represent offset in text.</param> |
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362 | /// <returns>True if aborted.</returns> |
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363 | public bool Parse(int start, int length, Func<char, int, bool> act = null) |
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364 | { |
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365 | for (int i = start; i < length; i++) { |
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366 | char ch = text [i]; |
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367 | char nextCh = i + 1 < text.Length ? text [i + 1] : '\0'; |
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368 | switch (ch) { |
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369 | case '#': |
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370 | if (IsFistNonWs) |
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371 | IsInPreprocessorDirective = true; |
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372 | break; |
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373 | case '/': |
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374 | if (IsInString || IsInChar || IsInVerbatimString || IsInSingleComment || IsInMultiLineComment) |
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375 | break; |
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376 | if (nextCh == '/') { |
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377 | i++; |
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378 | IsInSingleComment = true; |
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379 | IsInPreprocessorDirective = false; |
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380 | } |
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381 | if (nextCh == '*' && !IsInPreprocessorDirective) { |
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382 | IsInMultiLineComment = true; |
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383 | i++; |
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384 | } |
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385 | break; |
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386 | case '*': |
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387 | if (IsInString || IsInChar || IsInVerbatimString || IsInSingleComment) |
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388 | break; |
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389 | if (nextCh == '/') { |
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390 | i++; |
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391 | IsInMultiLineComment = false; |
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392 | } |
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393 | break; |
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394 | case '@': |
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395 | if (IsInString || IsInChar || IsInVerbatimString || IsInSingleComment || IsInMultiLineComment) |
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396 | break; |
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397 | if (nextCh == '"') { |
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398 | i++; |
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399 | IsInVerbatimString = true; |
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400 | } |
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401 | break; |
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402 | case '\n': |
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403 | case '\r': |
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404 | IsInSingleComment = false; |
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405 | IsInString = false; |
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406 | IsInChar = false; |
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407 | IsFistNonWs = true; |
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408 | IsInPreprocessorDirective = false; |
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409 | break; |
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410 | case '\\': |
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411 | if (IsInString || IsInChar) |
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412 | i++; |
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413 | break; |
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414 | case '"': |
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415 | if (IsInSingleComment || IsInMultiLineComment || IsInChar) |
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416 | break; |
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417 | if (IsInVerbatimString) { |
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418 | if (nextCh == '"') { |
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419 | i++; |
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420 | break; |
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421 | } |
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422 | IsInVerbatimString = false; |
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423 | break; |
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424 | } |
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425 | IsInString = !IsInString; |
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426 | break; |
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427 | case '\'': |
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428 | if (IsInSingleComment || IsInMultiLineComment || IsInString || IsInVerbatimString) |
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429 | break; |
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430 | IsInChar = !IsInChar; |
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431 | break; |
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432 | } |
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433 | if (act != null) |
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434 | if (act (ch, i)) |
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435 | return true; |
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436 | IsFistNonWs &= ch == ' ' || ch == '\t' || ch == '\n' || ch == '\r'; |
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437 | } |
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438 | return false; |
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439 | } |
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440 | } |
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441 | |
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442 | |
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443 | protected bool IsInsideCommentStringOrDirective(int offset) |
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444 | { |
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445 | var lexer = new MiniLexer(document.Text); |
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446 | lexer.Parse(0, offset); |
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447 | return |
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448 | lexer.IsInSingleComment || |
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449 | lexer.IsInString || |
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450 | lexer.IsInVerbatimString || |
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451 | lexer.IsInChar || |
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452 | lexer.IsInMultiLineComment || |
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453 | lexer.IsInPreprocessorDirective; |
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454 | } |
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455 | |
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456 | |
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457 | protected bool IsInsideCommentStringOrDirective() |
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458 | { |
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459 | var text = GetMemberTextToCaret(); |
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460 | var lexer = new MiniLexer(text.Item1); |
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461 | lexer.Parse(); |
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462 | return |
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463 | lexer.IsInSingleComment || |
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464 | lexer.IsInString || |
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465 | lexer.IsInVerbatimString || |
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466 | lexer.IsInChar || |
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467 | lexer.IsInMultiLineComment || |
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468 | lexer.IsInPreprocessorDirective; |
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469 | } |
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470 | |
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471 | protected bool IsInsideDocComment () |
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472 | { |
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473 | var text = GetMemberTextToCaret (); |
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474 | bool inSingleComment = false, inString = false, inVerbatimString = false, inChar = false, inMultiLineComment = false; |
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475 | bool singleLineIsDoc = false; |
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476 | |
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477 | for (int i = 0; i < text.Item1.Length - 1; i++) { |
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478 | char ch = text.Item1 [i]; |
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479 | char nextCh = text.Item1 [i + 1]; |
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480 | |
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481 | switch (ch) { |
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482 | case '/': |
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483 | if (inString || inChar || inVerbatimString) |
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484 | break; |
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485 | if (nextCh == '/') { |
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486 | i++; |
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487 | inSingleComment = true; |
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488 | singleLineIsDoc = i + 1 < text.Item1.Length && text.Item1 [i + 1] == '/'; |
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489 | if (singleLineIsDoc) { |
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490 | i++; |
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491 | } |
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492 | } |
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493 | if (nextCh == '*') |
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494 | inMultiLineComment = true; |
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495 | break; |
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496 | case '*': |
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497 | if (inString || inChar || inVerbatimString || inSingleComment) |
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498 | break; |
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499 | if (nextCh == '/') { |
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500 | i++; |
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501 | inMultiLineComment = false; |
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502 | } |
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503 | break; |
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504 | case '@': |
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505 | if (inString || inChar || inVerbatimString || inSingleComment || inMultiLineComment) |
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506 | break; |
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507 | if (nextCh == '"') { |
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508 | i++; |
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509 | inVerbatimString = true; |
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510 | } |
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511 | break; |
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512 | case '\n': |
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513 | case '\r': |
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514 | inSingleComment = false; |
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515 | inString = false; |
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516 | inChar = false; |
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517 | break; |
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518 | case '\\': |
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519 | if (inString || inChar) |
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520 | i++; |
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521 | break; |
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522 | case '"': |
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523 | if (inSingleComment || inMultiLineComment || inChar) |
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524 | break; |
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525 | if (inVerbatimString) { |
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526 | if (nextCh == '"') { |
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527 | i++; |
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528 | break; |
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529 | } |
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530 | inVerbatimString = false; |
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531 | break; |
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532 | } |
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533 | inString = !inString; |
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534 | break; |
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535 | case '\'': |
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536 | if (inSingleComment || inMultiLineComment || inString || inVerbatimString) |
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537 | break; |
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538 | inChar = !inChar; |
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539 | break; |
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540 | } |
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541 | } |
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542 | |
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543 | return inSingleComment && singleLineIsDoc; |
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544 | } |
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545 | |
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546 | protected CSharpResolver GetState () |
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547 | { |
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548 | return new CSharpResolver (ctx); |
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549 | /*var state = new CSharpResolver (ctx); |
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550 | |
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551 | state.CurrentMember = currentMember; |
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552 | state.CurrentTypeDefinition = currentType; |
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553 | state.CurrentUsingScope = CSharpUnresolvedFile.GetUsingScope (location); |
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554 | if (state.CurrentMember != null) { |
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555 | var node = Unit.GetNodeAt (location); |
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556 | if (node == null) |
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557 | return state; |
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558 | var navigator = new NodeListResolveVisitorNavigator (new[] { node }); |
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559 | var visitor = new ResolveVisitor (state, CSharpUnresolvedFile, navigator); |
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560 | Unit.AcceptVisitor (visitor, null); |
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561 | try { |
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562 | var newState = visitor.GetResolverStateBefore (node); |
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563 | if (newState != null) |
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564 | state = newState; |
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565 | } catch (Exception) { |
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566 | } |
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567 | } |
---|
568 | |
---|
569 | return state;*/ |
---|
570 | } |
---|
571 | #endregion |
---|
572 | |
---|
573 | #region Basic parsing/resolving functions |
---|
574 | static Stack<Tuple<char, int>> GetBracketStack (string memberText) |
---|
575 | { |
---|
576 | var bracketStack = new Stack<Tuple<char, int>> (); |
---|
577 | |
---|
578 | bool inSingleComment = false, inString = false, inVerbatimString = false, inChar = false, inMultiLineComment = false; |
---|
579 | |
---|
580 | for (int i = 0; i < memberText.Length; i++) { |
---|
581 | char ch = memberText [i]; |
---|
582 | char nextCh = i + 1 < memberText.Length ? memberText [i + 1] : '\0'; |
---|
583 | switch (ch) { |
---|
584 | case '(': |
---|
585 | case '[': |
---|
586 | case '{': |
---|
587 | if (inString || inChar || inVerbatimString || inSingleComment || inMultiLineComment) |
---|
588 | break; |
---|
589 | bracketStack.Push (Tuple.Create (ch, i)); |
---|
590 | break; |
---|
591 | case ')': |
---|
592 | case ']': |
---|
593 | case '}': |
---|
594 | if (inString || inChar || inVerbatimString || inSingleComment || inMultiLineComment) |
---|
595 | break; |
---|
596 | if (bracketStack.Count > 0) |
---|
597 | bracketStack.Pop (); |
---|
598 | break; |
---|
599 | case '/': |
---|
600 | if (inString || inChar || inVerbatimString) |
---|
601 | break; |
---|
602 | if (nextCh == '/') { |
---|
603 | i++; |
---|
604 | inSingleComment = true; |
---|
605 | } |
---|
606 | if (nextCh == '*') |
---|
607 | inMultiLineComment = true; |
---|
608 | break; |
---|
609 | case '*': |
---|
610 | if (inString || inChar || inVerbatimString || inSingleComment) |
---|
611 | break; |
---|
612 | if (nextCh == '/') { |
---|
613 | i++; |
---|
614 | inMultiLineComment = false; |
---|
615 | } |
---|
616 | break; |
---|
617 | case '@': |
---|
618 | if (inString || inChar || inVerbatimString || inSingleComment || inMultiLineComment) |
---|
619 | break; |
---|
620 | if (nextCh == '"') { |
---|
621 | i++; |
---|
622 | inVerbatimString = true; |
---|
623 | } |
---|
624 | break; |
---|
625 | case '\\': |
---|
626 | if (inString || inChar) |
---|
627 | i++; |
---|
628 | break; |
---|
629 | case '"': |
---|
630 | if (inSingleComment || inMultiLineComment || inChar) |
---|
631 | break; |
---|
632 | if (inVerbatimString) { |
---|
633 | if (nextCh == '"') { |
---|
634 | i++; |
---|
635 | break; |
---|
636 | } |
---|
637 | inVerbatimString = false; |
---|
638 | break; |
---|
639 | } |
---|
640 | inString = !inString; |
---|
641 | break; |
---|
642 | case '\'': |
---|
643 | if (inSingleComment || inMultiLineComment || inString || inVerbatimString) |
---|
644 | break; |
---|
645 | inChar = !inChar; |
---|
646 | break; |
---|
647 | default : |
---|
648 | if (NewLine.IsNewLine(ch)) { |
---|
649 | inSingleComment = false; |
---|
650 | inString = false; |
---|
651 | inChar = false; |
---|
652 | } |
---|
653 | break; |
---|
654 | } |
---|
655 | } |
---|
656 | return bracketStack; |
---|
657 | } |
---|
658 | |
---|
659 | public static void AppendMissingClosingBrackets (StringBuilder wrapper, bool appendSemicolon) |
---|
660 | { |
---|
661 | var memberText = wrapper.ToString(); |
---|
662 | var bracketStack = GetBracketStack(memberText); |
---|
663 | bool didAppendSemicolon = !appendSemicolon; |
---|
664 | //char lastBracket = '\0'; |
---|
665 | while (bracketStack.Count > 0) { |
---|
666 | var t = bracketStack.Pop (); |
---|
667 | switch (t.Item1) { |
---|
668 | case '(': |
---|
669 | wrapper.Append (')'); |
---|
670 | if (appendSemicolon) |
---|
671 | didAppendSemicolon = false; |
---|
672 | //lastBracket = ')'; |
---|
673 | break; |
---|
674 | case '[': |
---|
675 | wrapper.Append (']'); |
---|
676 | if (appendSemicolon) |
---|
677 | didAppendSemicolon = false; |
---|
678 | //lastBracket = ']'; |
---|
679 | break; |
---|
680 | case '<': |
---|
681 | wrapper.Append ('>'); |
---|
682 | if (appendSemicolon) |
---|
683 | didAppendSemicolon = false; |
---|
684 | //lastBracket = '>'; |
---|
685 | break; |
---|
686 | case '{': |
---|
687 | int o = t.Item2 - 1; |
---|
688 | if (!didAppendSemicolon) { |
---|
689 | didAppendSemicolon = true; |
---|
690 | wrapper.Append (';'); |
---|
691 | } |
---|
692 | |
---|
693 | bool didAppendCatch = false; |
---|
694 | while (o >= "try".Length) { |
---|
695 | char ch = memberText [o]; |
---|
696 | if (!char.IsWhiteSpace (ch)) { |
---|
697 | if (ch == 'y' && memberText [o - 1] == 'r' && memberText [o - 2] == 't' && (o - 3 < 0 || !char.IsLetterOrDigit(memberText [o - 3]))) { |
---|
698 | wrapper.Append ("} catch {}"); |
---|
699 | didAppendCatch = true; |
---|
700 | } |
---|
701 | break; |
---|
702 | } |
---|
703 | o--; |
---|
704 | } |
---|
705 | if (!didAppendCatch) |
---|
706 | wrapper.Append ('}'); |
---|
707 | break; |
---|
708 | } |
---|
709 | } |
---|
710 | if (!didAppendSemicolon) |
---|
711 | wrapper.Append (';'); |
---|
712 | } |
---|
713 | |
---|
714 | protected StringBuilder CreateWrapper(string continuation, bool appendSemicolon, string afterContinuation, string memberText, TextLocation memberLocation, ref int closingBrackets, ref int generatedLines) |
---|
715 | { |
---|
716 | var wrapper = new StringBuilder(); |
---|
717 | bool wrapInClass = memberLocation != new TextLocation(1, 1); |
---|
718 | if (wrapInClass) { |
---|
719 | wrapper.Append("class Stub {"); |
---|
720 | wrapper.AppendLine(); |
---|
721 | closingBrackets++; |
---|
722 | generatedLines++; |
---|
723 | } |
---|
724 | wrapper.Append(memberText); |
---|
725 | wrapper.Append(continuation); |
---|
726 | AppendMissingClosingBrackets(wrapper, appendSemicolon); |
---|
727 | wrapper.Append(afterContinuation); |
---|
728 | if (closingBrackets > 0) { |
---|
729 | wrapper.Append(new string('}', closingBrackets)); |
---|
730 | } |
---|
731 | return wrapper; |
---|
732 | } |
---|
733 | |
---|
734 | protected SyntaxTree ParseStub(string continuation, bool appendSemicolon = true, string afterContinuation = null) |
---|
735 | { |
---|
736 | var mt = GetMemberTextToCaret(); |
---|
737 | if (mt == null) { |
---|
738 | return null; |
---|
739 | } |
---|
740 | |
---|
741 | string memberText = mt.Item1; |
---|
742 | var memberLocation = mt.Item2; |
---|
743 | int closingBrackets = 1; |
---|
744 | int generatedLines = 0; |
---|
745 | var wrapper = CreateWrapper(continuation, appendSemicolon, afterContinuation, memberText, memberLocation, ref closingBrackets, ref generatedLines); |
---|
746 | var parser = new CSharpParser (); |
---|
747 | foreach (var sym in CompletionContextProvider.ConditionalSymbols) |
---|
748 | parser.CompilerSettings.ConditionalSymbols.Add (sym); |
---|
749 | parser.InitialLocation = new TextLocation(memberLocation.Line - generatedLines, 1); |
---|
750 | var result = parser.Parse(wrapper.ToString ()); |
---|
751 | return result; |
---|
752 | } |
---|
753 | |
---|
754 | protected virtual void Reset () |
---|
755 | { |
---|
756 | memberText = null; |
---|
757 | } |
---|
758 | |
---|
759 | Tuple<string, TextLocation> memberText; |
---|
760 | protected Tuple<string, TextLocation> GetMemberTextToCaret() |
---|
761 | { |
---|
762 | if (memberText == null) |
---|
763 | memberText = CompletionContextProvider.GetMemberTextToCaret(offset, currentType, currentMember); |
---|
764 | return memberText; |
---|
765 | } |
---|
766 | |
---|
767 | protected ExpressionResult GetInvocationBeforeCursor(bool afterBracket) |
---|
768 | { |
---|
769 | SyntaxTree baseUnit; |
---|
770 | baseUnit = ParseStub("a", false); |
---|
771 | |
---|
772 | var section = baseUnit.GetNodeAt<AttributeSection>(location.Line, location.Column - 2); |
---|
773 | var attr = section != null ? section.Attributes.LastOrDefault() : null; |
---|
774 | if (attr != null) { |
---|
775 | return new ExpressionResult((AstNode)attr, baseUnit); |
---|
776 | } |
---|
777 | |
---|
778 | //var memberLocation = currentMember != null ? currentMember.Region.Begin : currentType.Region.Begin; |
---|
779 | var mref = baseUnit.GetNodeAt(location.Line, location.Column - 1, n => n is InvocationExpression || n is ObjectCreateExpression); |
---|
780 | AstNode expr = null; |
---|
781 | if (mref is InvocationExpression) { |
---|
782 | expr = ((InvocationExpression)mref).Target; |
---|
783 | } else if (mref is ObjectCreateExpression) { |
---|
784 | expr = mref; |
---|
785 | } else { |
---|
786 | baseUnit = ParseStub(")};", false); |
---|
787 | mref = baseUnit.GetNodeAt(location.Line, location.Column - 1, n => n is InvocationExpression || n is ObjectCreateExpression); |
---|
788 | if (mref is InvocationExpression) { |
---|
789 | expr = ((InvocationExpression)mref).Target; |
---|
790 | } else if (mref is ObjectCreateExpression) { |
---|
791 | expr = mref; |
---|
792 | } |
---|
793 | } |
---|
794 | |
---|
795 | if (expr == null) { |
---|
796 | // work around for missing ';' bug in mcs: |
---|
797 | baseUnit = ParseStub("a", true); |
---|
798 | |
---|
799 | section = baseUnit.GetNodeAt<AttributeSection>(location.Line, location.Column - 2); |
---|
800 | attr = section != null ? section.Attributes.LastOrDefault() : null; |
---|
801 | if (attr != null) { |
---|
802 | return new ExpressionResult((AstNode)attr, baseUnit); |
---|
803 | } |
---|
804 | |
---|
805 | //var memberLocation = currentMember != null ? currentMember.Region.Begin : currentType.Region.Begin; |
---|
806 | mref = baseUnit.GetNodeAt(location.Line, location.Column - 1, n => n is InvocationExpression || n is ObjectCreateExpression); |
---|
807 | expr = null; |
---|
808 | if (mref is InvocationExpression) { |
---|
809 | expr = ((InvocationExpression)mref).Target; |
---|
810 | } else if (mref is ObjectCreateExpression) { |
---|
811 | expr = mref; |
---|
812 | } |
---|
813 | } |
---|
814 | |
---|
815 | if (expr == null) { |
---|
816 | return null; |
---|
817 | } |
---|
818 | return new ExpressionResult ((AstNode)expr, baseUnit); |
---|
819 | } |
---|
820 | |
---|
821 | public class ExpressionResult |
---|
822 | { |
---|
823 | public AstNode Node { get; private set; } |
---|
824 | public SyntaxTree Unit { get; private set; } |
---|
825 | |
---|
826 | |
---|
827 | public ExpressionResult (AstNode item2, SyntaxTree item3) |
---|
828 | { |
---|
829 | this.Node = item2; |
---|
830 | this.Unit = item3; |
---|
831 | } |
---|
832 | |
---|
833 | public override string ToString () |
---|
834 | { |
---|
835 | return string.Format ("[ExpressionResult: Node={0}, Unit={1}]", Node, Unit); |
---|
836 | } |
---|
837 | } |
---|
838 | |
---|
839 | protected ExpressionResolveResult ResolveExpression (ExpressionResult tuple) |
---|
840 | { |
---|
841 | return ResolveExpression (tuple.Node); |
---|
842 | } |
---|
843 | |
---|
844 | protected class ExpressionResolveResult |
---|
845 | { |
---|
846 | public ResolveResult Result { get; set; } |
---|
847 | public CSharpResolver Resolver { get; set; } |
---|
848 | public CSharpAstResolver AstResolver { get; set; } |
---|
849 | |
---|
850 | public ExpressionResolveResult(ResolveResult item1, CSharpResolver item2, CSharpAstResolver item3) |
---|
851 | { |
---|
852 | this.Result = item1; |
---|
853 | this.Resolver = item2; |
---|
854 | this.AstResolver = item3; |
---|
855 | } |
---|
856 | } |
---|
857 | |
---|
858 | protected ExpressionResolveResult ResolveExpression(AstNode expr) |
---|
859 | { |
---|
860 | if (expr == null) { |
---|
861 | return null; |
---|
862 | } |
---|
863 | AstNode resolveNode; |
---|
864 | if (expr is Expression || expr is AstType) { |
---|
865 | resolveNode = expr; |
---|
866 | } else if (expr is VariableDeclarationStatement) { |
---|
867 | resolveNode = ((VariableDeclarationStatement)expr).Type; |
---|
868 | } else { |
---|
869 | resolveNode = expr; |
---|
870 | } |
---|
871 | try { |
---|
872 | var root = expr.AncestorsAndSelf.FirstOrDefault(n => n is EntityDeclaration || n is SyntaxTree); |
---|
873 | if (root == null) { |
---|
874 | return null; |
---|
875 | } |
---|
876 | var curState = GetState(); |
---|
877 | // current member needs to be in the setter because of the 'value' parameter |
---|
878 | if (root is Accessor) { |
---|
879 | var prop = curState.CurrentMember as IProperty; |
---|
880 | if (prop != null && prop.CanSet && (root.Role == IndexerDeclaration.SetterRole || root.Role == PropertyDeclaration.SetterRole)) |
---|
881 | curState = curState.WithCurrentMember(prop.Setter); |
---|
882 | } |
---|
883 | |
---|
884 | // Rood should be the 'body' - otherwise the state -> current member isn't correct. |
---|
885 | var body = root.Children.FirstOrDefault(r => r.Role == Roles.Body); |
---|
886 | if (body != null && body.Contains(expr.StartLocation)) |
---|
887 | root = body; |
---|
888 | |
---|
889 | var csResolver = CompletionContextProvider.GetResolver (curState, root); |
---|
890 | var result = csResolver.Resolve(resolveNode); |
---|
891 | var state = csResolver.GetResolverStateBefore(resolveNode); |
---|
892 | if (state.CurrentMember == null) |
---|
893 | state = state.WithCurrentMember(curState.CurrentMember); |
---|
894 | if (state.CurrentTypeDefinition == null) |
---|
895 | state = state.WithCurrentTypeDefinition(curState.CurrentTypeDefinition); |
---|
896 | if (state.CurrentUsingScope == null) |
---|
897 | state = state.WithCurrentUsingScope(curState.CurrentUsingScope); |
---|
898 | return new ExpressionResolveResult(result, state, csResolver); |
---|
899 | } catch (Exception e) { |
---|
900 | Console.WriteLine(e); |
---|
901 | return null; |
---|
902 | } |
---|
903 | } |
---|
904 | |
---|
905 | #endregion |
---|
906 | } |
---|
907 | } |
---|