1 | // Copyright (c) 2010-2013 AlphaSierraPapa for the SharpDevelop Team |
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2 | // |
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3 | // Permission is hereby granted, free of charge, to any person obtaining a copy of this |
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4 | // software and associated documentation files (the "Software"), to deal in the Software |
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5 | // without restriction, including without limitation the rights to use, copy, modify, merge, |
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6 | // publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons |
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7 | // to whom the Software is furnished to do so, subject to the following conditions: |
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8 | // |
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9 | // The above copyright notice and this permission notice shall be included in all copies or |
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10 | // substantial portions of the Software. |
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11 | // |
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12 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, |
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13 | // INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR |
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14 | // PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE |
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15 | // FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR |
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16 | // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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17 | // DEALINGS IN THE SOFTWARE. |
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18 | |
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19 | using System; |
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20 | using System.Collections.Generic; |
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21 | using System.Diagnostics; |
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22 | using System.Linq; |
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23 | using ICSharpCode.NRefactory.CSharp.TypeSystem; |
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24 | using ICSharpCode.NRefactory.TypeSystem; |
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25 | using ICSharpCode.NRefactory.TypeSystem.Implementation; |
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26 | using ICSharpCode.NRefactory.Utils; |
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27 | |
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28 | namespace ICSharpCode.NRefactory.CSharp.TypeSystem |
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29 | { |
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30 | /// <summary> |
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31 | /// Represents a scope that contains "using" statements. |
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32 | /// This is either the file itself, or a namespace declaration. |
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33 | /// </summary> |
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34 | [Serializable] |
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35 | public class UsingScope : AbstractFreezable |
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36 | { |
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37 | readonly UsingScope parent; |
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38 | DomRegion region; |
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39 | string shortName = ""; |
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40 | IList<TypeOrNamespaceReference> usings; |
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41 | IList<KeyValuePair<string, TypeOrNamespaceReference>> usingAliases; |
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42 | IList<string> externAliases; |
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43 | |
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44 | protected override void FreezeInternal() |
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45 | { |
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46 | usings = FreezableHelper.FreezeList(usings); |
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47 | usingAliases = FreezableHelper.FreezeList(usingAliases); |
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48 | externAliases = FreezableHelper.FreezeList(externAliases); |
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49 | |
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50 | // In current model (no child scopes), it makes sense to freeze the parent as well |
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51 | // to ensure the whole lookup chain is immutable. |
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52 | if (parent != null) |
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53 | parent.Freeze(); |
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54 | |
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55 | base.FreezeInternal(); |
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56 | } |
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57 | |
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58 | /// <summary> |
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59 | /// Creates a new root using scope. |
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60 | /// </summary> |
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61 | public UsingScope() |
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62 | { |
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63 | } |
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64 | |
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65 | /// <summary> |
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66 | /// Creates a new nested using scope. |
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67 | /// </summary> |
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68 | /// <param name="parent">The parent using scope.</param> |
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69 | /// <param name="shortName">The short namespace name.</param> |
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70 | public UsingScope(UsingScope parent, string shortName) |
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71 | { |
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72 | if (parent == null) |
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73 | throw new ArgumentNullException("parent"); |
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74 | if (shortName == null) |
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75 | throw new ArgumentNullException("shortName"); |
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76 | this.parent = parent; |
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77 | this.shortName = shortName; |
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78 | } |
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79 | |
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80 | public UsingScope Parent { |
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81 | get { return parent; } |
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82 | } |
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83 | |
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84 | public DomRegion Region { |
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85 | get { return region; } |
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86 | set { |
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87 | FreezableHelper.ThrowIfFrozen(this); |
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88 | region = value; |
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89 | } |
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90 | } |
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91 | |
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92 | public string ShortNamespaceName { |
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93 | get { |
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94 | return shortName; |
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95 | } |
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96 | } |
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97 | |
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98 | public string NamespaceName { |
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99 | get { |
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100 | if (parent != null) |
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101 | return NamespaceDeclaration.BuildQualifiedName(parent.NamespaceName, shortName); |
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102 | else |
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103 | return shortName; |
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104 | } |
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105 | // set { |
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106 | // if (value == null) |
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107 | // throw new ArgumentNullException("NamespaceName"); |
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108 | // FreezableHelper.ThrowIfFrozen(this); |
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109 | // namespaceName = value; |
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110 | // } |
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111 | } |
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112 | |
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113 | public IList<TypeOrNamespaceReference> Usings { |
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114 | get { |
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115 | if (usings == null) |
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116 | usings = new List<TypeOrNamespaceReference>(); |
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117 | return usings; |
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118 | } |
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119 | } |
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120 | |
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121 | public IList<KeyValuePair<string, TypeOrNamespaceReference>> UsingAliases { |
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122 | get { |
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123 | if (usingAliases == null) |
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124 | usingAliases = new List<KeyValuePair<string, TypeOrNamespaceReference>>(); |
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125 | return usingAliases; |
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126 | } |
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127 | } |
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128 | |
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129 | public IList<string> ExternAliases { |
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130 | get { |
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131 | if (externAliases == null) |
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132 | externAliases = new List<string>(); |
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133 | return externAliases; |
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134 | } |
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135 | } |
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136 | |
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137 | // public IList<UsingScope> ChildScopes { |
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138 | // get { |
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139 | // if (childScopes == null) |
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140 | // childScopes = new List<UsingScope>(); |
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141 | // return childScopes; |
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142 | // } |
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143 | // } |
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144 | |
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145 | /// <summary> |
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146 | /// Gets whether this using scope has an alias (either using or extern) |
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147 | /// with the specified name. |
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148 | /// </summary> |
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149 | public bool HasAlias(string identifier) |
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150 | { |
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151 | if (usingAliases != null) { |
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152 | foreach (var pair in usingAliases) { |
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153 | if (pair.Key == identifier) |
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154 | return true; |
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155 | } |
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156 | } |
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157 | return externAliases != null && externAliases.Contains(identifier); |
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158 | } |
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159 | |
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160 | /// <summary> |
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161 | /// Resolves the namespace represented by this using scope. |
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162 | /// </summary> |
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163 | public ResolvedUsingScope Resolve(ICompilation compilation) |
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164 | { |
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165 | CacheManager cache = compilation.CacheManager; |
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166 | ResolvedUsingScope resolved = cache.GetShared(this) as ResolvedUsingScope; |
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167 | if (resolved == null) { |
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168 | var csContext = new CSharpTypeResolveContext(compilation.MainAssembly, parent != null ? parent.Resolve(compilation) : null); |
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169 | resolved = (ResolvedUsingScope)cache.GetOrAddShared(this, new ResolvedUsingScope(csContext, this)); |
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170 | } |
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171 | return resolved; |
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172 | } |
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173 | } |
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174 | } |
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