Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / wpf / src / Framework / System / Windows / ResourcesChangeInfo.cs / 1 / ResourcesChangeInfo.cs
//---------------------------------------------------------------------------- // // File: ResourcesChangeInfo.cs // // Description: // This data-structure is used // 1. As the data that is passed around by the DescendentsWalker // during a resources change tree-walk. // // Copyright (C) by Microsoft Corporation. All rights reserved. // //--------------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Diagnostics; namespace System.Windows { ////// This is the data that is passed through the DescendentsWalker /// during a resources change tree-walk. /// internal struct ResourcesChangeInfo { #region Constructors ////// This constructor is used for notifying changes to individual /// entries in a ResourceDictionary /// internal ResourcesChangeInfo(object key) { _oldDictionaries = null; _newDictionaries = null; _key = key; _container = null; _flags = 0; } ////// This constructor is used for notifying changes in Application.Resources, /// [FE/FCE].Resources, ResourceDictionary.EndInit /// internal ResourcesChangeInfo(ResourceDictionary oldDictionary, ResourceDictionary newDictionary) { _oldDictionaries = null; if (oldDictionary != null) { _oldDictionaries = new List(1); _oldDictionaries.Add(oldDictionary); } _newDictionaries = null; if (newDictionary != null) { _newDictionaries = new List (1); _newDictionaries.Add(newDictionary); } _key = null; _container = null; _flags = 0; } /// /// This constructor is used for notifying changes in Style.Resources, /// Template.Resources, ThemeStyle.Resources /// internal ResourcesChangeInfo( ListoldDictionaries, List newDictionaries, bool isStyleResourcesChange, bool isTemplateResourcesChange, DependencyObject container) { _oldDictionaries = oldDictionaries; _newDictionaries = newDictionaries; _key = null; _container = container; _flags = 0; IsStyleResourcesChange = isStyleResourcesChange; IsTemplateResourcesChange = isTemplateResourcesChange; } #endregion Constructors #region Operations /// /// This is a static accessor for a ResourcesChangeInfo that is used /// for theme change notifications /// internal static ResourcesChangeInfo ThemeChangeInfo { get { ResourcesChangeInfo info = new ResourcesChangeInfo(); info.IsThemeChange = true; return info; } } ////// This is a static accessor for a ResourcesChangeInfo that is used /// for tree change notifications /// internal static ResourcesChangeInfo TreeChangeInfo { get { ResourcesChangeInfo info = new ResourcesChangeInfo(); info.IsTreeChange = true; return info; } } ////// This is a static accessor for a ResourcesChangeInfo that is used /// for system colors or settings change notifications /// internal static ResourcesChangeInfo SysColorsOrSettingsChangeInfo { get { ResourcesChangeInfo info = new ResourcesChangeInfo(); info.IsSysColorsOrSettingsChange = true; return info; } } ////// This is a static accessor for a ResourcesChangeInfo that is used /// for any ResourceDictionary operations that we aren't able to provide /// the precise 'key that changed' information /// internal static ResourcesChangeInfo CatastrophicDictionaryChangeInfo { get { ResourcesChangeInfo info = new ResourcesChangeInfo(); info.IsCatastrophicDictionaryChange = true; return info; } } // This flag is used to indicate that a theme change has occured internal bool IsThemeChange { get { return ReadPrivateFlag(PrivateFlags.IsThemeChange); } set { WritePrivateFlag(PrivateFlags.IsThemeChange, value); } } // This flag is used to indicate that a tree change has occured internal bool IsTreeChange { get { return ReadPrivateFlag(PrivateFlags.IsTreeChange); } set { WritePrivateFlag(PrivateFlags.IsTreeChange, value); } } // This flag is used to indicate that a style has changed internal bool IsStyleResourcesChange { get { return ReadPrivateFlag(PrivateFlags.IsStyleResourceChange); } set { WritePrivateFlag(PrivateFlags.IsStyleResourceChange, value); } } // This flag is used to indicate that this resource change was triggered from a Template change internal bool IsTemplateResourcesChange { get {return ReadPrivateFlag(PrivateFlags.IsTemplateResourceChange); } set { WritePrivateFlag(PrivateFlags.IsTemplateResourceChange, value); } } // This flag is used to indicate that a system color or settings change has occured internal bool IsSysColorsOrSettingsChange { get {return ReadPrivateFlag(PrivateFlags.IsSysColorsOrSettingsChange); } set { WritePrivateFlag(PrivateFlags.IsSysColorsOrSettingsChange, value); } } // This flag is used to indicate that a catastrophic dictionary change has occured internal bool IsCatastrophicDictionaryChange { get {return ReadPrivateFlag(PrivateFlags.IsCatastrophicDictionaryChange); } set { WritePrivateFlag(PrivateFlags.IsCatastrophicDictionaryChange, value); } } // This flag is used to indicate if the current operation is an effective add operation internal bool IsResourceAddOperation { get { return _key != null || (_newDictionaries != null && _newDictionaries.Count > 0); } } // This member is used to identify the container when a style change happens internal DependencyObject Container { get { return _container; } } // Says if either the old or the new dictionaries contain the given key internal bool Contains(object key, bool isImplicitStyleKey) { if (IsTreeChange || IsCatastrophicDictionaryChange) { return true; } else if (IsThemeChange || IsSysColorsOrSettingsChange) { // Implicit Styles are not fetched from the Themes. // So we do not need to respond to theme changes. // This is a performance optimization. return !isImplicitStyleKey; } Debug.Assert(_oldDictionaries != null || _newDictionaries != null || _key != null, "Must have a dictionary or a key that has changed"); if (_key != null) { if (Object.Equals(_key, key)) { return true; } } if (_oldDictionaries != null) { for (int i=0; i<_oldDictionaries.Count; i++) { if (_oldDictionaries[i].Contains(key)) { return true; } } } if (_newDictionaries != null) { for (int i=0; i<_newDictionaries.Count; i++) { if (_newDictionaries[i].Contains(key)) { return true; } } } return false; } #endregion Operations #region PrivateMethods private void WritePrivateFlag(PrivateFlags bit, bool value) { if (value) { _flags |= bit; } else { _flags &= ~bit; } } private bool ReadPrivateFlag(PrivateFlags bit) { return (_flags & bit) != 0; } #endregion PrivateMethods #region PrivateDataStructures private enum PrivateFlags : byte { IsThemeChange = 0x01, IsTreeChange = 0x02, IsStyleResourceChange = 0x04, IsTemplateResourceChange = 0x08, IsSysColorsOrSettingsChange = 0x10, IsCatastrophicDictionaryChange = 0x20, } #endregion PrivateDataStructures #region Data private List_oldDictionaries; private List _newDictionaries; private object _key; private DependencyObject _container; private PrivateFlags _flags; #endregion Data } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved. //---------------------------------------------------------------------------- // // File: ResourcesChangeInfo.cs // // Description: // This data-structure is used // 1. As the data that is passed around by the DescendentsWalker // during a resources change tree-walk. // // Copyright (C) by Microsoft Corporation. All rights reserved. // //--------------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Diagnostics; namespace System.Windows { /// /// This is the data that is passed through the DescendentsWalker /// during a resources change tree-walk. /// internal struct ResourcesChangeInfo { #region Constructors ////// This constructor is used for notifying changes to individual /// entries in a ResourceDictionary /// internal ResourcesChangeInfo(object key) { _oldDictionaries = null; _newDictionaries = null; _key = key; _container = null; _flags = 0; } ////// This constructor is used for notifying changes in Application.Resources, /// [FE/FCE].Resources, ResourceDictionary.EndInit /// internal ResourcesChangeInfo(ResourceDictionary oldDictionary, ResourceDictionary newDictionary) { _oldDictionaries = null; if (oldDictionary != null) { _oldDictionaries = new List(1); _oldDictionaries.Add(oldDictionary); } _newDictionaries = null; if (newDictionary != null) { _newDictionaries = new List (1); _newDictionaries.Add(newDictionary); } _key = null; _container = null; _flags = 0; } /// /// This constructor is used for notifying changes in Style.Resources, /// Template.Resources, ThemeStyle.Resources /// internal ResourcesChangeInfo( ListoldDictionaries, List newDictionaries, bool isStyleResourcesChange, bool isTemplateResourcesChange, DependencyObject container) { _oldDictionaries = oldDictionaries; _newDictionaries = newDictionaries; _key = null; _container = container; _flags = 0; IsStyleResourcesChange = isStyleResourcesChange; IsTemplateResourcesChange = isTemplateResourcesChange; } #endregion Constructors #region Operations /// /// This is a static accessor for a ResourcesChangeInfo that is used /// for theme change notifications /// internal static ResourcesChangeInfo ThemeChangeInfo { get { ResourcesChangeInfo info = new ResourcesChangeInfo(); info.IsThemeChange = true; return info; } } ////// This is a static accessor for a ResourcesChangeInfo that is used /// for tree change notifications /// internal static ResourcesChangeInfo TreeChangeInfo { get { ResourcesChangeInfo info = new ResourcesChangeInfo(); info.IsTreeChange = true; return info; } } ////// This is a static accessor for a ResourcesChangeInfo that is used /// for system colors or settings change notifications /// internal static ResourcesChangeInfo SysColorsOrSettingsChangeInfo { get { ResourcesChangeInfo info = new ResourcesChangeInfo(); info.IsSysColorsOrSettingsChange = true; return info; } } ////// This is a static accessor for a ResourcesChangeInfo that is used /// for any ResourceDictionary operations that we aren't able to provide /// the precise 'key that changed' information /// internal static ResourcesChangeInfo CatastrophicDictionaryChangeInfo { get { ResourcesChangeInfo info = new ResourcesChangeInfo(); info.IsCatastrophicDictionaryChange = true; return info; } } // This flag is used to indicate that a theme change has occured internal bool IsThemeChange { get { return ReadPrivateFlag(PrivateFlags.IsThemeChange); } set { WritePrivateFlag(PrivateFlags.IsThemeChange, value); } } // This flag is used to indicate that a tree change has occured internal bool IsTreeChange { get { return ReadPrivateFlag(PrivateFlags.IsTreeChange); } set { WritePrivateFlag(PrivateFlags.IsTreeChange, value); } } // This flag is used to indicate that a style has changed internal bool IsStyleResourcesChange { get { return ReadPrivateFlag(PrivateFlags.IsStyleResourceChange); } set { WritePrivateFlag(PrivateFlags.IsStyleResourceChange, value); } } // This flag is used to indicate that this resource change was triggered from a Template change internal bool IsTemplateResourcesChange { get {return ReadPrivateFlag(PrivateFlags.IsTemplateResourceChange); } set { WritePrivateFlag(PrivateFlags.IsTemplateResourceChange, value); } } // This flag is used to indicate that a system color or settings change has occured internal bool IsSysColorsOrSettingsChange { get {return ReadPrivateFlag(PrivateFlags.IsSysColorsOrSettingsChange); } set { WritePrivateFlag(PrivateFlags.IsSysColorsOrSettingsChange, value); } } // This flag is used to indicate that a catastrophic dictionary change has occured internal bool IsCatastrophicDictionaryChange { get {return ReadPrivateFlag(PrivateFlags.IsCatastrophicDictionaryChange); } set { WritePrivateFlag(PrivateFlags.IsCatastrophicDictionaryChange, value); } } // This flag is used to indicate if the current operation is an effective add operation internal bool IsResourceAddOperation { get { return _key != null || (_newDictionaries != null && _newDictionaries.Count > 0); } } // This member is used to identify the container when a style change happens internal DependencyObject Container { get { return _container; } } // Says if either the old or the new dictionaries contain the given key internal bool Contains(object key, bool isImplicitStyleKey) { if (IsTreeChange || IsCatastrophicDictionaryChange) { return true; } else if (IsThemeChange || IsSysColorsOrSettingsChange) { // Implicit Styles are not fetched from the Themes. // So we do not need to respond to theme changes. // This is a performance optimization. return !isImplicitStyleKey; } Debug.Assert(_oldDictionaries != null || _newDictionaries != null || _key != null, "Must have a dictionary or a key that has changed"); if (_key != null) { if (Object.Equals(_key, key)) { return true; } } if (_oldDictionaries != null) { for (int i=0; i<_oldDictionaries.Count; i++) { if (_oldDictionaries[i].Contains(key)) { return true; } } } if (_newDictionaries != null) { for (int i=0; i<_newDictionaries.Count; i++) { if (_newDictionaries[i].Contains(key)) { return true; } } } return false; } #endregion Operations #region PrivateMethods private void WritePrivateFlag(PrivateFlags bit, bool value) { if (value) { _flags |= bit; } else { _flags &= ~bit; } } private bool ReadPrivateFlag(PrivateFlags bit) { return (_flags & bit) != 0; } #endregion PrivateMethods #region PrivateDataStructures private enum PrivateFlags : byte { IsThemeChange = 0x01, IsTreeChange = 0x02, IsStyleResourceChange = 0x04, IsTemplateResourceChange = 0x08, IsSysColorsOrSettingsChange = 0x10, IsCatastrophicDictionaryChange = 0x20, } #endregion PrivateDataStructures #region Data private List_oldDictionaries; private List _newDictionaries; private object _key; private DependencyObject _container; private PrivateFlags _flags; #endregion Data } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- ICspAsymmetricAlgorithm.cs
- ThemeableAttribute.cs
- ServiceReference.cs
- Interlocked.cs
- BitmapEffectOutputConnector.cs
- ExpressionList.cs
- Byte.cs
- PropertyMap.cs
- SimpleApplicationHost.cs
- HtmlCommandAdapter.cs
- EtwTrace.cs
- MetadataPropertyvalue.cs
- UriExt.cs
- odbcmetadatacollectionnames.cs
- SerializationUtilities.cs
- RectangleGeometry.cs
- AttachedPropertyBrowsableForChildrenAttribute.cs
- RichTextBoxConstants.cs
- ScriptingJsonSerializationSection.cs
- HotSpot.cs
- SystemIPGlobalStatistics.cs
- Script.cs
- MultipleViewPatternIdentifiers.cs
- EncryptedXml.cs
- EventEntry.cs
- NativeMethodsOther.cs
- DoubleKeyFrameCollection.cs
- ListControl.cs
- GC.cs
- EventLogTraceListener.cs
- XmlQueryTypeFactory.cs
- NumericUpDownAccelerationCollection.cs
- sqlpipe.cs
- XmlAutoDetectWriter.cs
- XmlSchemaDatatype.cs
- OdbcEnvironment.cs
- Pair.cs
- StylusPointPropertyUnit.cs
- UnaryExpression.cs
- Image.cs
- ISFTagAndGuidCache.cs
- DataGridDetailsPresenterAutomationPeer.cs
- AssemblyHash.cs
- GridViewColumnHeader.cs
- LazyTextWriterCreator.cs
- HttpModulesSection.cs
- _SecureChannel.cs
- NullableDecimalAverageAggregationOperator.cs
- CodeMemberMethod.cs
- KeyGestureConverter.cs
- AtomContentProperty.cs
- ToolStripItemImageRenderEventArgs.cs
- SoapElementAttribute.cs
- ToolstripProfessionalRenderer.cs
- TemplatedEditableDesignerRegion.cs
- _WinHttpWebProxyDataBuilder.cs
- Rfc2898DeriveBytes.cs
- AspNetHostingPermission.cs
- SapiGrammar.cs
- SQLInt16Storage.cs
- ResourceManager.cs
- ScopelessEnumAttribute.cs
- ProtocolsConfiguration.cs
- UInt32Storage.cs
- AnonymousIdentificationModule.cs
- DetectEofStream.cs
- ButtonBase.cs
- CommentAction.cs
- LicenseException.cs
- SrgsGrammarCompiler.cs
- RuntimeEnvironment.cs
- DoubleMinMaxAggregationOperator.cs
- FontFamilyValueSerializer.cs
- CompilerState.cs
- SingleConverter.cs
- XamlStyleSerializer.cs
- EventLogLink.cs
- WebServiceErrorEvent.cs
- BindingMAnagerBase.cs
- HttpModuleCollection.cs
- Int16Converter.cs
- AttributeProviderAttribute.cs
- SetStateEventArgs.cs
- UpWmlPageAdapter.cs
- WindowsStartMenu.cs
- CompModSwitches.cs
- TranslateTransform3D.cs
- TraceSource.cs
- AuthenticatedStream.cs
- MexTcpBindingCollectionElement.cs
- StreamInfo.cs
- TriggerCollection.cs
- XmlLanguageConverter.cs
- BufferBuilder.cs
- SingleStorage.cs
- ToolStripTextBox.cs
- RecognizedWordUnit.cs
- OutputCacheProfile.cs
- SystemException.cs
- RecordsAffectedEventArgs.cs