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| 1 | +using System; |
| 2 | +using System.Collections.Generic; |
| 3 | +using System.Linq; |
| 4 | +using Rubberduck.VBEditor.SafeComWrappers; |
| 5 | +using Rubberduck.VBEditor.SafeComWrappers.Abstract; |
| 6 | + |
| 7 | +namespace Rubberduck.VBEditor.Events |
| 8 | +{ |
| 9 | + public sealed class VBEEvents : IVBEEvents |
| 10 | + { |
| 11 | + private static VBEEvents _instance; |
| 12 | + private static readonly object Lock = new object(); |
| 13 | + private readonly IVBProjects _projects; |
| 14 | + private readonly Dictionary<string, IVBComponents> _components; |
| 15 | + |
| 16 | + public static VBEEvents Initialize(IVBE vbe) |
| 17 | + { |
| 18 | + lock (Lock) |
| 19 | + { |
| 20 | + if (_instance == null) |
| 21 | + { |
| 22 | + _instance = new VBEEvents(vbe); |
| 23 | + } |
| 24 | + } |
| 25 | + |
| 26 | + return _instance; |
| 27 | + } |
| 28 | + |
| 29 | + public static void Terminate() |
| 30 | + { |
| 31 | + lock (Lock) |
| 32 | + { |
| 33 | + if (_instance == null) |
| 34 | + { |
| 35 | + return; |
| 36 | + } |
| 37 | + |
| 38 | + _instance.Dispose(); |
| 39 | + _instance = null; |
| 40 | + } |
| 41 | + } |
| 42 | + |
| 43 | + private VBEEvents(IVBE vbe) |
| 44 | + { |
| 45 | + _components = new Dictionary<string, IVBComponents>(); |
| 46 | + |
| 47 | + if (_projects != null) |
| 48 | + { |
| 49 | + return; |
| 50 | + } |
| 51 | + |
| 52 | + _projects = vbe.VBProjects; |
| 53 | + |
| 54 | + _projects.AttachEvents(); |
| 55 | + _projects.ProjectAdded += ProjectAddedHandler; |
| 56 | + _projects.ProjectRemoved += ProjectRemovedHandler; |
| 57 | + _projects.ProjectRenamed += ProjectRenamedHandler; |
| 58 | + _projects.ProjectActivated += ProjectActivatedHandler; |
| 59 | + foreach (var project in _projects) |
| 60 | + using (project) |
| 61 | + { |
| 62 | + { |
| 63 | + RegisterComponents(project); |
| 64 | + } |
| 65 | + } |
| 66 | + } |
| 67 | + |
| 68 | + private void RegisterComponents(IVBProject project) |
| 69 | + { |
| 70 | + if (project.IsWrappingNullReference || project.Protection != ProjectProtection.Unprotected) |
| 71 | + { |
| 72 | + return; |
| 73 | + } |
| 74 | + |
| 75 | + if (string.IsNullOrWhiteSpace(project.ProjectId)) |
| 76 | + { |
| 77 | + project.AssignProjectId(); |
| 78 | + } |
| 79 | + |
| 80 | + var components = project.VBComponents; |
| 81 | + _components.Add(project.ProjectId, components); |
| 82 | + |
| 83 | + components.AttachEvents(); |
| 84 | + components.ComponentAdded += ComponentAddedHandler; |
| 85 | + components.ComponentRemoved += ComponentRemovedHandler; |
| 86 | + components.ComponentRenamed += ComponentRenamedHandler; |
| 87 | + components.ComponentActivated += ComponentActivatedHandler; |
| 88 | + components.ComponentSelected += ComponentSelectedHandler; |
| 89 | + components.ComponentReloaded += ComponentReloadedHandler; |
| 90 | + } |
| 91 | + |
| 92 | + private void UnregisterComponents(string projectId) |
| 93 | + { |
| 94 | + if (!_components.ContainsKey(projectId)) |
| 95 | + { |
| 96 | + return; |
| 97 | + } |
| 98 | + |
| 99 | + using (var components = _components[projectId]) |
| 100 | + { |
| 101 | + components.ComponentAdded -= ComponentAddedHandler; |
| 102 | + components.ComponentRemoved -= ComponentRemovedHandler; |
| 103 | + components.ComponentRenamed -= ComponentRenamedHandler; |
| 104 | + components.ComponentActivated -= ComponentActivatedHandler; |
| 105 | + components.ComponentSelected -= ComponentSelectedHandler; |
| 106 | + components.ComponentReloaded -= ComponentReloadedHandler; |
| 107 | + components.DetachEvents(); |
| 108 | + |
| 109 | + _components.Remove(projectId); |
| 110 | + } |
| 111 | + } |
| 112 | + |
| 113 | + public event EventHandler<ProjectEventArgs> ProjectAdded; |
| 114 | + private void ProjectAddedHandler(object sender, ProjectEventArgs e) |
| 115 | + { |
| 116 | + if (!_components.ContainsKey(e.ProjectId)) |
| 117 | + { |
| 118 | + RegisterComponents(e.Project); |
| 119 | + } |
| 120 | + ProjectAdded?.Invoke(sender, e); |
| 121 | + } |
| 122 | + |
| 123 | + public event EventHandler<ProjectEventArgs> ProjectRemoved; |
| 124 | + private void ProjectRemovedHandler(object sender, ProjectEventArgs e) |
| 125 | + { |
| 126 | + UnregisterComponents(e.ProjectId); |
| 127 | + ProjectRemoved?.Invoke(sender, e); |
| 128 | + } |
| 129 | + |
| 130 | + public event EventHandler<ProjectRenamedEventArgs> ProjectRenamed; |
| 131 | + private void ProjectRenamedHandler(object sender, ProjectRenamedEventArgs e) |
| 132 | + { |
| 133 | + ProjectRenamed?.Invoke(sender, e); |
| 134 | + } |
| 135 | + |
| 136 | + public event EventHandler<ProjectEventArgs> ProjectActivated; |
| 137 | + private void ProjectActivatedHandler(object sender, ProjectEventArgs e) |
| 138 | + { |
| 139 | + ProjectActivated?.Invoke(sender, e); |
| 140 | + } |
| 141 | + |
| 142 | + public event EventHandler<ComponentEventArgs> ComponentAdded; |
| 143 | + private void ComponentAddedHandler(object sender, ComponentEventArgs e) |
| 144 | + { |
| 145 | + ComponentAdded?.Invoke(sender, e); |
| 146 | + } |
| 147 | + |
| 148 | + public event EventHandler<ComponentEventArgs> ComponentRemoved; |
| 149 | + private void ComponentRemovedHandler(object sender, ComponentEventArgs e) |
| 150 | + { |
| 151 | + ComponentRemoved?.Invoke(sender, e); |
| 152 | + } |
| 153 | + |
| 154 | + public event EventHandler<ComponentRenamedEventArgs> ComponentRenamed; |
| 155 | + private void ComponentRenamedHandler(object sender, ComponentRenamedEventArgs e) |
| 156 | + { |
| 157 | + ComponentRenamed?.Invoke(sender, e); |
| 158 | + } |
| 159 | + |
| 160 | + public event EventHandler<ComponentEventArgs> ComponentActivated; |
| 161 | + private void ComponentActivatedHandler(object sender, ComponentEventArgs e) |
| 162 | + { |
| 163 | + ComponentActivated?.Invoke(sender, e); |
| 164 | + } |
| 165 | + |
| 166 | + public event EventHandler<ComponentEventArgs> ComponentSelected; |
| 167 | + private void ComponentSelectedHandler(object sender, ComponentEventArgs e) |
| 168 | + { |
| 169 | + ComponentSelected?.Invoke(sender, e); |
| 170 | + } |
| 171 | + |
| 172 | + public event EventHandler<ComponentEventArgs> ComponentReloaded; |
| 173 | + private void ComponentReloadedHandler(object sender, ComponentEventArgs e) |
| 174 | + { |
| 175 | + ComponentReloaded?.Invoke(sender, e); |
| 176 | + } |
| 177 | + |
| 178 | + public event EventHandler EventsTerminated; |
| 179 | + |
| 180 | + #region IDisposable |
| 181 | + |
| 182 | + private bool _disposed; |
| 183 | + /// <remarks> |
| 184 | + /// This is a not a true implementation of IDisposable pattern |
| 185 | + /// because the method is made private and is available only |
| 186 | + /// via the static method <see cref="Terminate"/> to provide |
| 187 | + /// a single point of entry for disposing the singleton class |
| 188 | + /// </remarks> |
| 189 | + private void Dispose(bool disposing) |
| 190 | + { |
| 191 | + if (!_disposed && _projects != null) |
| 192 | + { |
| 193 | + EventsTerminated?.Invoke(this, EventArgs.Empty); |
| 194 | + |
| 195 | + var projectIds = _components.Keys.ToArray(); |
| 196 | + foreach (var projectid in projectIds) |
| 197 | + { |
| 198 | + UnregisterComponents(projectid); |
| 199 | + } |
| 200 | + |
| 201 | + _projects.ProjectActivated -= ProjectActivatedHandler; |
| 202 | + _projects.ProjectRenamed -= ProjectRenamedHandler; |
| 203 | + _projects.ProjectRemoved -= ProjectRemovedHandler; |
| 204 | + _projects.ProjectAdded -= ProjectAddedHandler; |
| 205 | + _projects.DetachEvents(); |
| 206 | + _projects.Dispose(); |
| 207 | + |
| 208 | + _disposed = true; |
| 209 | + } |
| 210 | + } |
| 211 | + |
| 212 | + ~VBEEvents() |
| 213 | + { |
| 214 | + // Do not change this code. Put cleanup code in Dispose(bool disposing) above. |
| 215 | + Dispose(false); |
| 216 | + } |
| 217 | + |
| 218 | + // This code added to correctly implement the disposable pattern. |
| 219 | + private void Dispose() |
| 220 | + { |
| 221 | + // Do not change this code. Put cleanup code in Dispose(bool disposing) above. |
| 222 | + Dispose(true); |
| 223 | + GC.SuppressFinalize(this); |
| 224 | + } |
| 225 | + #endregion |
| 226 | + } |
| 227 | +} |
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